JP7715549B2 - Control device, heating and dehydration system, control method, and program - Google Patents

Description

The present invention relates to a control device, a heating and dehydration system, a control method, and a program.

Conventionally, in sludge dehydrators such as screw presses and centrifugal dehydrators, the moisture content of the sludge discharged from the sludge dehydrator (hereinafter also referred to as "dehydrated sludge") can be estimated based on the axial torque of the screw shaft. Attempts have been made to maintain a constant moisture content in the dehydrated sludge by performing constant torque control according to the estimated moisture content.

For example, Patent Document 1 below discloses a technology for estimating the moisture content of dehydrated cake discharged from a centrifugal dehydrator using parameters other than axial torque. The multiple parameters include, for example, values related to the rotation of the bowl and screw, values related to the amount and solids concentration of sludge and separated water, and values related to the amount of coagulant, but do not include a value related to the temperature of the sludge.

Japanese Patent Application Laid-Open No. 2020-114569

The viscosity of sludge changes with changes in sludge temperature, and changes in sludge properties due to changes in sludge temperature also cause changes in viscosity. This change in sludge viscosity due to changes in sludge temperature also changes the relationship between the shaft torque of the sludge dehydrator and the moisture content of the dehydrated sludge. Therefore, when the sludge temperature changes in the sludge dehydrator, it is preferable to take the change in sludge temperature into consideration in order to maintain a constant moisture content of the dehydrated sludge.
However, the technology of Patent Document 1 does not take into consideration changes in sludge temperature. Therefore, when the sludge temperature changes in the sludge dehydrator, it is difficult to maintain a constant moisture content in the dehydrated sludge discharged from the sludge dehydrator using a method of controlling the moisture content of the dehydrated sludge as in the technology of Patent Document 1.

In view of the above-mentioned problems, the object of the present invention is to provide a control device, a heated dehydration system, a control method, and a program that can operate a sludge dehydrator so that dehydrated sludge with a stable moisture content is discharged even when the sludge temperature changes in the sludge dehydrator.

In order to solve the above-described problems, a control device according to one aspect of the present invention includes a target value acquisition unit that acquires, as a first target value for controlling the sludge dehydrator, either a target moisture content indicating a target value for the moisture content of dehydrated sludge desired in an incinerator that incinerates dehydrated sludge dehydrated in the sludge dehydrator, or a target shaft torque indicating a target value for the shaft torque of a rotary drive unit of the sludge dehydrator necessary to obtain dehydrated sludge with the desired moisture content in the incinerator; a sludge information acquisition unit that acquires sludge information indicating factors that affect the correlation between the moisture content and the shaft torque in operation of the sludge dehydrator, the sludge information including at least a sludge temperature that is the temperature of the dehydrated sludge; and, when the acquired first target value is the target moisture content, calculates a correlation between the moisture content and the shaft torque based on the target moisture content and the sludge information. the control object is at least one of a target shaft torque determination unit that determines the target shaft torque, which is correlated with the shaft torque, as a second target value for controlling the controlled object, and a target operating parameter determination unit that, when the acquired first target value is the target shaft torque, determines a target operating parameter, which is a target value of an operating parameter other than the shaft torque that is correlated with the shaft torque in operating the sludge dewatering machine, as the second target value based on the target shaft torque and the sludge information; and a control unit that controls the controlled object in accordance with the determined second target value, wherein the controlled object is at least one of a controllable part of the sludge dewatering machine that needs to be controlled in accordance with the first target value and the sludge information, or a pump that controls the supply to the sludge dewatering machine .

A heating and dehydration system according to one aspect of the present invention is equipped with a control device.

A control method according to one aspect of the present invention includes a target value acquisition step in which a target value acquisition unit acquires, as a first target value for controlling the sludge dehydrator, either a target moisture content indicating a target value for the moisture content of dehydrated sludge desired in an incinerator that incinerates dehydrated sludge dehydrated in the sludge dehydrator, or a target shaft torque indicating a target value for the shaft torque of a rotary drive unit of the sludge dehydrator necessary to obtain dehydrated sludge with the desired moisture content in the incinerator; a sludge information acquisition step in which a sludge information acquisition unit acquires sludge information indicating factors that affect the correlation between the moisture content and the shaft torque in operation of the sludge dehydrator, the sludge information including at least a sludge temperature which is the temperature of the dehydrated sludge; and when the acquired first target value is the target moisture content, a target shaft torque determination unit determines a torque that is correlated with the moisture content based on the target moisture content and the sludge information. The system includes a target value determination process including at least one of a target shaft torque determination process in which a certain target shaft torque is determined as a second target value for control of the controlled object, or a target operating parameter determination process in which, when the acquired first target value is the target shaft torque, a target operating parameter determination unit determines, as the second target value, a target operating parameter which is a target value of an operating parameter other than the shaft torque that is correlated with the shaft torque in operation of the sludge dewatering machine based on the target shaft torque and the sludge information, and a control process in which a control unit controls the controlled object in accordance with the determined second target value, wherein the controlled object is at least one of a controllable part of the sludge dewatering machine that needs to be controlled in accordance with the first target value and the sludge information, or a pump that controls the supply to the sludge dewatering machine .

A program according to one aspect of the present invention causes a computer to include target value acquisition means for acquiring, as a first target value for controlling the sludge dehydrator, either a target moisture content indicating a target value for the moisture content of dehydrated sludge desired in an incinerator that incinerates dehydrated sludge dehydrated by the sludge dehydrator, or a target shaft torque indicating a target value for the shaft torque of a rotary drive unit of the sludge dehydrator necessary to obtain dehydrated sludge with the desired moisture content in the incinerator; sludge information acquisition means for acquiring sludge information indicating factors that affect the correlation between the moisture content and the shaft torque in operation of the sludge dehydrator, the sludge information including at least a sludge temperature which is the temperature of the dehydrated sludge; and , when the acquired first target value is the target moisture content, acquiring, based on the target moisture content and the sludge information, a value of the moisture content that is correlated with the moisture content. The device functions as a target value determination means that functions as at least one of a target shaft torque determination means that determines a target shaft torque as a second target value for controlling the controlled object, or a target operating parameter determination means that, when the acquired first target value is the target shaft torque, determines a target operating parameter that is a target value of an operating parameter other than the shaft torque that is correlated with the shaft torque in operating the sludge dewatering machine as the second target value based on the target shaft torque and the sludge information, and a control means that controls the controlled object in accordance with the determined second target value, wherein the controlled object is at least one of a controllable part of the sludge dewatering machine that needs to be controlled in accordance with the first target value and the sludge information, or a pump that controls the supply to the sludge dewatering machine .

According to the present invention, a sludge dehydrator can be operated so that dehydrated sludge with a stable moisture content is discharged even when the sludge temperature changes.

1 is a diagram showing an example of the configuration of a heating dehydration system 1 according to a first embodiment. FIG. 2 is a block diagram showing an example of a functional configuration of a control panel 100 according to the first embodiment. FIG. 2 is a diagram illustrating an example of input and output in the control panel 100 according to the first embodiment. 4 is a flowchart showing an example of an operation of the control panel 100 according to the first embodiment. FIG. 10 is a block diagram showing an example of a functional configuration of a control panel 100a according to a second embodiment. FIG. 11 is a diagram illustrating an example of priorities of control targets according to the second embodiment. FIG. 10 is a diagram illustrating an example of inputs and outputs in a control panel 100a according to a second embodiment. 10 is a flowchart showing an example of the operation of a control panel 100a according to a second embodiment. FIG. 11 is a block diagram showing an example of a functional configuration of a control panel 100b according to a third embodiment. FIG. 10 is a diagram illustrating an example of inputs and outputs in a control panel 100b according to a third embodiment. 10 is a flowchart showing an example of the operation of a control panel 100b according to the third embodiment. FIG. 10 is a block diagram showing an example of the functional configuration of a control panel 100c according to a fourth embodiment. FIG. 10 is a diagram illustrating an example of inputs and outputs in a control panel 100c according to a fourth embodiment. 10 is a flowchart showing an example of the operation of a control panel 100c according to a fourth embodiment. FIG. 11 is a block diagram showing an example of the functional configuration of a control panel 100d according to a fifth embodiment. FIG. 11 is a diagram illustrating an example of inputs and outputs in a control panel 100d according to a fifth embodiment. 13 is a flowchart showing an example of the operation of a control panel 100d according to a fifth embodiment. FIG. 13 is a block diagram showing an example of the functional configuration of a control panel 100e according to a sixth embodiment. FIG. 13 is a diagram illustrating an example of inputs and outputs in a control panel 100e according to a sixth embodiment. 13 is a flowchart showing an example of the operation of a control panel 100e according to a sixth embodiment.

The present invention relates to a system for controlling the operation of a sludge dehydrator so that dehydrated sludge with a stable moisture content is discharged from the sludge dehydrator.

In the following embodiments, the first target value is a target value related to control of the sludge dewatering machine, which is determined according to the operating state of the incinerator that incinerates the dewatered sludge that has been dewatered by the sludge dewatering machine.
The first target value may be, for example, the moisture content of the dewatered sludge, which is the moisture content of the dewatered sludge desired in the incinerator, or the shaft torque of the rotary drive unit of the sludge dewatering machine, which is the shaft torque required to obtain dewatered sludge with the moisture content desired in the incinerator.
The second target value is a target value for controlling a control object that is correlated with the first target value based on the relationship between the first target value and sludge information. For example, if the first target value is the moisture content of dewatered sludge, the second target value is the shaft torque required to obtain dewatered sludge with that moisture content. Also, if the first target value is the shaft torque of the rotary drive unit of the sludge dewatering machine, the second target value is an operating parameter of the sludge dewatering machine other than the shaft torque of the rotary drive unit of the sludge dewatering machine. Examples of operating parameters include the flocculant addition rate, injection pressure, backpressure shutoff rate, differential speed, centrifugal acceleration, sludge supply rate, heat transfer medium temperature, heat transfer medium flow rate, and polymer flocculant injection rate.

The sludge information includes at least the sludge temperature, which is the temperature of the sludge being dewatered in the sludge dewatering machine. In addition to the sludge temperature, the sludge information includes, for example, the sludge mixing ratio, the sludge supply amount, the polymer flocculant dosing rate, the polymer flocculant viscosity, and the flocculant addition rate.
The controlled objects include, for example, controllable parts of the sludge dewatering machine including the rotary drive unit, as well as pumps that supply sludge, polymer flocculant, hot water, etc. to the sludge dewatering machine.

In this invention, a second target value is determined from the relationship between the first target value and sludge information, and the controlled object is controlled according to the determined second target value. The second target value is determined using at least one of a target shaft torque determination model or a target operating parameter determination model.

The target shaft torque determination model uses the target moisture content of the dewatered sludge as the first target value, and determines the target shaft torque, which is the target value of the shaft torque in the rotary drive unit of the sludge dewatering machine, as the second target value from the target moisture content and sludge information.
The target operating parameter determination model is a model that uses a target shaft torque in the rotary drive unit of the sludge dehydrator as a first target value, and determines a target operating parameter, which is a target value for an operating parameter of the sludge dehydrator other than the shaft torque, as a second target value from the target shaft torque and sludge information.

Embodiments of the present invention will be described in detail below with reference to the drawings.

<<1. First embodiment>>
A first embodiment will be described with reference to Figures 1 to 4. In the first embodiment, an example will be described in which only a target shaft torque determination model is used to determine the second target value.

<1-1. Configuration of heating and dehydration system>
First, the configuration of a heating and dehydration system according to a first embodiment will be described with reference to Fig. 1. Fig. 1 is a diagram showing an example of the configuration of a heating and dehydration system according to the first embodiment.
In the first embodiment, the heating and dehydration system 1 includes a flocculation device 10, a concentration device 20, a concentrated sludge supply pump 30, a flocculant supply pump 40, a flocculant flow meter 45, an injection pressure sensor 48, a heating and dehydration machine 50, a torque sensor 51, a thermometer 52, a dewatered sludge hopper 55, a heat transfer medium supply pump 60, a heat transfer medium flow meter 65, a dewatered sludge supply pump 70, a sludge flow meter 78, an incineration facility 80, and a control panel 100.

The flocculation device 10 has a flocculation tank in which a polymer flocculant B is added to organic sludge A, such as mixed raw sludge generated and supplied from a sewage treatment plant or the like, to flocculate the sludge. The flocculation tank has an agitation function that agitates the organic sludge A and polymer flocculant B. The organic sludge A and polymer flocculant B are agitated and mixed to flocculate. The flocculation device 10 supplies the flocculated organic sludge A to the concentration device 20 as flocculated sludge C.

The thickening device 20 thickens the flocculated sludge C flocculated by the flocculation device 10. For example, the thickening device 20 has a thickening filter screen inside, and the flocculated sludge C supplied from the flocculation device 10 is thickened by separating water from the flocculated sludge C using this thickening filter screen.
The thickened sludge supply pump 30 supplies the thickened sludge discharged from the thickening device 20 to the heating dehydrator 50 as thickened sludge D.

The output side of the flocculant supply pump 40 is connected to a path connecting the thickened sludge supply pump 30 and the heating dehydrator 50. The flocculant supply pump 40 supplies a flocculant to the thickened sludge D supplied from the thickened sludge supply pump 30 to the heating dehydrator 50. The flocculant supplied is at least one of a polymer flocculant and an inorganic flocculant. In the first embodiment, a case where an inorganic flocculant E is supplied will be described. This inorganic flocculant can be, for example, polyferric sulfate (PFS).
The flocculant flow meter 45 measures the amount of flocculant supplied from the flocculant supply pump 40 to the concentrated sludge D, and outputs the measurement result to the control panel 100.
The injection pressure sensor 48 detects the injection pressure of the concentrated sludge D supplied to the heating dehydrator 50 and outputs the detection result to the control panel 100 .

The heating dehydrator 50 is a sludge dehydrator having a function of heating sludge, and dehydrates the concentrated sludge D supplied from the concentrated sludge supply pump 30. When an inorganic coagulant is supplied to the concentrated sludge D by the coagulant supply pump 40, the heating dehydrator 50 dehydrates the concentrated sludge D after the inorganic coagulant has been injected.
In the first embodiment, the case where the heating dehydrator 50 is a vertical screw press is described, but any dehydrator that can dehydrate concentrated sludge may also be used, such as a horizontal screw press or a rotary press.

In the heated dehydrator 50, a filter screen 50B for filtering concentrated sludge D is disposed within the casing 50A. Of the multiple spaces within the casing 50A separated by this filter screen 50B, concentrated sludge D is supplied to the first space 50A1.

The heated dehydrator 50 also includes an inner filtration screen 50Ba, an outer filtration screen 50Bb, and a ribbon screw 50d. The inner filtration screen 50Ba serves as the second filtration screen 50B and is disposed within the casing 50A in a cylindrical or conical shape centered on a vertically extending axis coaxial with the casing 50A. The outer filtration screen 50Bb is disposed within the casing 50A in a cylindrical or conical shape coaxial with the inner filtration screen 50Ba and spaced apart from the outer side of the inner filtration screen 50Ba. The ribbon screw 50d is housed between the inner filtration screen 50Ba and the outer filtration screen 50Bb in a spiral shape twisting around the axis, and is rotated relative to the inner filtration screen 50Ba and the outer filtration screen 50Bb around the axis by a rotation drive unit 50c, such as a motor.

The casing 50A is cylindrical with a bottom and centered on the axis. The inner filtration screen 50Ba and the outer filtration screen 50Bb are formed of, for example, wedge wire or punched metal.
The space between the inner filtration screen 50Ba and the outer filtration screen 50Bb is the first space 50A1 into which the thickened sludge D is supplied.
The space outside the outer filtration screen 50Bb and on the inner circumferential side of the casing 50A is a second space 50A2.
The space inside the inner filtration screen 50Ba is a third space 50A3.

The heating unit 50A4 heats the concentrated sludge D in the heating dehydrator 50. For example, the heating unit 50A4 heats the storage unit containing the concentrated sludge D from the outer periphery. In this embodiment, the heating unit 50A4 supplies hot water H from the heat medium supply pump 60 to a space outside the outer filtration screen 50Bb and on the inner periphery of the casing 50A (i.e., the second space 50A2). This mixes the filtrate with the hot water H, raising the temperature of the filtrate and the temperature of the second space 50A2. This transfers heat to the concentrated sludge D via the outer filtration screen 50Bb, thereby heating the concentrated sludge D. In this manner, the storage unit is heated from the outer periphery.
Here, the case where the storage unit is the filter screen 50B will be described, but it is sufficient if it can heat the concentrated sludge D supplied from outside the heating dehydrator 50. As long as the storage unit can store concentrated sludge D, for example, the filter screen 50B may have a storage area in the axial direction where no filter screen is formed, and this storage area may be heated. Alternatively, both this storage area and the filter screen 50B may be heated.

The heating unit 50A4 may heat the entire storage unit, a partial area in the axial direction, or a partial area in the circumferential direction.

Furthermore, while the medium used to heat the storage section is explained as hot water H, other media may be used as long as they are capable of heating the storage section. A heater or the like may also be used.

The temperature of the hot water H may be any temperature higher than the temperature of the concentrated sludge D. The temperature of the hot water H is, for example, in the range of 50°C or higher and lower than 100°C, preferably in the range of 60°C or higher and 90°C or lower.
Here, if the temperature of the hot water H is less than 50°C, the effects of reducing the viscosity of the concentrated sludge D and separating water as described above cannot be fully obtained. Furthermore, if the temperature of the hot water H exceeds 100°C, handling becomes more difficult. Note that the higher the temperature of the hot water H, the more it can reduce the viscosity of the concentrated sludge D and promote water separation due to thermal denaturation of proteins. However, when the hot water used in the treatment equipment for organic sludge A as described above is used as the hot water H, a temperature range of 60°C or higher and 90°C or lower is realistic.

This hot water H is supplied from the bottom of the casing 50A to the second space 50A2 inside the casing 50A. The hot water H supplied to the second space 50A2 in this way heats the concentrated sludge D in the first space 50A1. As the concentrated sludge D is heated using the hot water H as a heat medium, the proteins in the concentrated sludge D are thermally denatured, causing the water content to separate. As the concentrated sludge D is heated using the hot water H as a heat medium, the viscosity of the concentrated sludge D decreases. The thickened sludge D is then filtered by the inner filtration screen 50Ba and the outer filtration screen 50Bb.
The filtrate is discharged as wastewater J from a drain pipe 50H rising from the second space 50A2. In addition, the hot water H cooled by heating the concentrated sludge D is discharged as wastewater J from the drain pipe 50H together with the filtrate.

The connecting plate 50e connects the bottom of the inner filtration screen 50Ba and the bottom of the outer filtration screen 50Bb. The connecting plate 50e has a circular ring shape. A supply pipe 50f is connected to the connecting plate 50e.
The supply pipe 50f supplies the thickened sludge D supplied from the thickened sludge supply pump 30 into the first space 50A1 from the bottom of the casing 50A. The thickened sludge D supplied from the supply pipe 50f is transported upward by the relative rotation of the ribbon screw 50d, and water is separated from the thickened sludge D by the inner filtration screen 50Ba and the outer filtration screen 50Bb. Here, a large filtration area can be ensured, thereby achieving more efficient filtration.

A circular plate-shaped base plate 50C is disposed in the upper portion of the casing 50A. The outer filtration screen 50Bb is attached and fixed to the inner periphery of the base plate 50C. A lid 50D is disposed in the upper opening of the casing 50A above the base plate 50C, and the inner filtration screen 50Ba is attached and fixed to the lid 50D.
The rotation drive unit 50c is disposed on the cover 50D and rotates the ribbon screw 50d via a cylindrical screw support that covers the upper part of the inner filtration screen 50Ba.
In the first embodiment, the inner filtration screen 50Ba and the outer filtration screen 50Bb are fixed to the casing as described above, and the ribbon screw 50d is rotated by the rotary drive unit 50c. However, conversely, the ribbon screw 50d may be fixed and the inner filtration screen 50Ba and the outer filtration screen 50Bb may be rotated, or the ribbon screw 50d and the inner filtration screen 50Ba and the outer filtration screen 50Bb may be rotated in opposite directions to each other.

Within the casing 50A, the upper space between the substrate 50C and the lid 50D is defined as a discharge chamber 50E, and the annular upper opening of the first space 50A1 in this discharge chamber 50E is defined as a discharge port 50F. A back pressure plate 50G having a truncated conical outer surface that extends upward toward the outer periphery and is centered on the axis is disposed in this discharge port 50F.
The dehydrated sludge I, which is transported upward through the first space 50A1 by the ribbon screw 50d and has water separated from the concentrated sludge D, flows out of the discharge outlet 50F into the discharge chamber 50E while being compressed by the back pressure plate 50G and is then discharged.
A back pressure plate drive unit is attached to the back pressure plate 50G. The back pressure plate drive unit moves the back pressure plate in the longitudinal direction of the axis so as to achieve an opening degree according to an instruction from the control panel 100.
The back pressure sensor 50Gs detects the opening degree of the back pressure plate.

The torque sensor 51 measures the shaft torque of the heating dehydrator 50. For example, the torque sensor 51 is configured to be able to measure the torque of the rotary drive unit 50c. The torque sensor 51 measures the torque of the rotary drive unit 50c as the shaft torque of the heating dehydrator 50 and outputs the measurement result to the control panel 100.

The thermometer 52 measures the temperature (sludge temperature) of the sludge dewatered by the heating dehydrator 50. For example, the thermometer 52 is installed so that it can measure the temperature of the dewatered sludge I that has been dewatered and discharged into the discharge chamber 50E. The thermometer 52 measures the sludge temperature of the dewatered sludge I that has been discharged into the discharge chamber 50E, and outputs the measurement result to the control panel 100.

The dewatered sludge hopper 55 temporarily stores the dewatered sludge I discharged from the heating dehydrator 50. The dewatered sludge I stored in the dewatered sludge hopper 55 is supplied to the incineration facility 80 by the dewatered sludge supply pump 70.
A weighing scale (not shown) is provided in the dewatered sludge hopper 55. The weighing scale provided in the dewatered sludge hopper 55 measures the weight of the dewatered sludge hopper 55 and outputs the measurement result to the control panel 100. For example, the weighing scale measures the weight of the dewatered sludge hopper 55 before the supply of dewatered sludge I begins, and the weight of the dewatered sludge hopper 55 in a state where the supply of dewatered sludge I has been temporarily stopped after the supply of dewatered sludge I has begun. The amount of dewatered sludge I supplied to the incineration facility 80 can be calculated from the difference between these weights.

The heat medium supply pump 60 supplies the heat medium heated by the heat obtained by burning the sludge discharged from the heating and dehydration system 1 to the heating and dehydration machine 50 (for example, the heating section 50A4).
The heat medium flow meter 65 measures the amount of hot water H supplied from the heat medium supply pump 60 to the heating section 50A4, and outputs the measurement result to the control panel 100.

The dewatered sludge supply pump 70 supplies the dewatered sludge I stored in the dewatered sludge hopper 55 to the incineration facility 80.
The sludge flow meter 78 measures the supply amount (sludge supply amount) of sludge (dewatered sludge I) supplied from the dewatered sludge supply pump 70 to the incineration facility 80 and outputs the measurement result to the control panel 100.

The incineration equipment 80 incinerates the dewatered sludge I discharged from the heating dehydrator 50. The incineration equipment 80 includes an incinerator 81, a boiler 82, and a flue gas treatment tower 83. The incinerator 81 incinerates the dewatered sludge I supplied from the heating dehydrator 50. If the incinerator 81 can be operated so that the moisture content of the dewatered sludge I is near its spontaneous combustion point, the dewatered sludge I can be burned without using auxiliary fuel. Therefore, it is preferable that the moisture content of the dewatered sludge I fluctuate little. Furthermore, if the moisture content of the dewatered sludge I does not fluctuate from near its spontaneous combustion point, there is no need to use auxiliary fuel and there is no need to lower the temperature inside the incinerator 81 by spraying water, etc., which can also prevent unnecessary dehydration (excessive reduction in moisture content).

The boiler 82 uses the heat of the combustion exhaust gas from the incinerator 81 to heat the heat medium using a heat exchanger. For example, water supplied from the flue gas treatment tower 83 can be used as the heat medium. The water supplied from the flue gas treatment tower 83 is already heated in the flue gas treatment tower 83, and the boiler 82 further heats this water before supplying it to the heat medium supply pump 60. This allows the heat medium heated using the heat of the combustion exhaust gas to be supplied to the heating dehydrator 50.

The flue gas treatment tower 83 sprays water supplied from the outside to remove predetermined substances such as dust and impurities from the combustion exhaust gas supplied from the boiler 82, and exhausts the combustion exhaust gas from a chimney. The flue gas treatment tower 83 also heats the water supplied from the outside using the heat of the combustion exhaust gas and supplies it to the boiler 82.
The control panel 100 controls each part in the heating dehydration system 1. The control panel 100 is configured by a computer or the like.

<1-2. Control panel functional configuration>
The configuration of the heating dehydration system 1 according to the first embodiment has been described above. Next, the functional configuration of the control panel 100 according to the first embodiment will be described with reference to Fig. 2. Fig. 2 is a block diagram showing an example of the functional configuration of the control panel 100 according to the first embodiment.
As shown in FIG. 2 , the control panel 100 includes a communication unit 110 , a target value acquisition unit 120 , a sludge information acquisition unit 130 , a storage unit 140 , a target value determination unit 150 , and a control unit 160 .

(1) Communication unit 110
The communication unit 110 has a function of transmitting and receiving various types of information. For example, the communication unit 110 communicates with each unit of the heating and dehydration system 1.

(2) Target value acquisition unit 120
The target value acquisition unit 120 acquires a first target value for controlling the heating dehydrator 50, which is determined depending on the operating state of the incinerator 81 that incinerates the dehydrated sludge dehydrated by the heating dehydrator 50. For example, the target value acquisition unit 120 acquires, as the first target value, the moisture content of the dehydrated sludge desired in the incinerator 81 (hereinafter also referred to as the "target moisture content"). As an example, the target value acquisition unit 120 acquires the target moisture content output from a control device of the incineration equipment 80 or the like provided in the incineration equipment 80.

(3) Sludge information acquisition unit 130
The sludge information acquisition unit 130 acquires sludge information that includes at least the sludge temperature, which is the temperature of the sludge being dewatered in the heating dehydrator 50. For example, the sludge information acquisition unit 130 acquires the sludge temperature from the thermometer 52 as the sludge information.
The sludge information acquiring unit 130 may acquire information other than sludge temperature as sludge information. For example, the sludge information acquiring unit 130 may acquire the sludge mixing ratio, sludge supply amount, polymer flocculant dosing rate (pre-stage or post-stage), polymer flocculant viscosity, and flocculant (e.g., polyferric sulfate) addition rate as sludge information. The priority of the sludge information acquired by the sludge information acquiring unit 130 is, for example, sludge temperature = sludge mixing ratio > flocculant addition rate > polymer flocculant dosing rate (pre-stage and post-stage) > polymer flocculant viscosity > sludge supply amount.
The sludge mixing ratio acquired by the sludge information acquisition unit 130 is, for example, the mixing ratio of primary settling sludge, excess sludge, digested sludge, etc. for the sludge supplied to the heating dehydrator 50.
The sludge supply amount acquired by the sludge information acquisition unit 130 is, for example, the amount of sludge supplied to the heating dehydrator 50 .
The polymer flocculant dosing rate acquired by the sludge information acquisition unit 130 is, for example, the addition rate of polymer flocculant B supplied from a polymer flocculant supply device (not shown) to organic sludge A and concentrated sludge D. Here, the first part of the polymer flocculant dosing rate is, for example, the dosing rate to organic sludge A, and the second part of the polymer flocculant dosing rate is, for example, the dosing rate to concentrated sludge D.
The polymer flocculant viscosity acquired by the sludge information acquisition unit 130 is, for example, the viscosity of polymer flocculant B supplied to organic sludge A and concentrated sludge D from a polymer flocculant supply device (not shown).
The flocculant addition rate acquired by the sludge information acquisition unit 130 is, for example, the flocculant addition rate supplied to the concentrated sludge D (the ratio of the flocculant to the concentrated sludge D).

(4) Storage unit 140
The storage unit 140 has a function of storing various types of information. The storage unit 140 is configured by a storage medium, such as a hard disk drive (HDD), a network attached storage (NAS), a solid state drive (SSD), a flash memory, an electrically erasable programmable read-only memory (EEPROM), a random access read/write memory (RAM), a read-only memory (ROM), or any combination of these storage media.
As shown in FIG. 2, the storage unit 140 has a target shaft torque determination model 141 .

(4-1) Target shaft torque determination model 141
The target shaft torque determination model 141 determines the target shaft torque for the rotary drive unit 50c of the heating dehydrator 50 based on the target moisture content of the dehydrated sludge and the sludge information. The target shaft torque determination model 141 is, for example, a trained model that has been machine-learned to determine the relationship between the moisture content of the dehydrated sludge, the sludge information, and the shaft torque of the rotary drive unit 50c.
That is, when the moisture content of the dewatered sludge and sludge information are input as input data, the target shaft torque determination model 141 can output the shaft torque of the rotation drive unit 50c as output data.

The sludge information used as input data for the target shaft torque determination model 141 specifically includes sludge temperature, sludge mixing ratio, sludge supply amount, polymer flocculant dosing rate, polymer flocculant viscosity, flocculant addition rate, etc., and includes at least sludge temperature.

Any machine learning method may be applied to the target shaft torque determination model 141. Examples of the any machine learning method include linear regression, support vector machine regression, Gaussian process regression, decision tree, and neural network.
The target shaft torque determination model 141 is not limited to a trained model based on machine learning, and may be, for example, a regression model, a regression calculation formula, a classification model, or the like.

(5) Target value determination unit 150
The target value determination unit 150 determines a second target value for control of a control object that is correlated with the first target value based on the relationship between the first target value acquired by the target value acquisition unit 120 and the sludge information acquired by the sludge information acquisition unit 130.
As shown in FIG. 2, the target value determination unit 150 includes only a target shaft torque determination unit 151 .

(5-1) Target shaft torque determination unit 151
The target shaft torque determination unit 151 determines the target shaft torque from the relationship between the target moisture content (first target value) acquired by the target value acquisition unit 120 and the sludge information acquired by the sludge information acquisition unit 130. For example, the target shaft torque is determined using a target shaft torque determination model 141. In the first embodiment, the target shaft torque determination unit 151 uses the machine-learned target shaft torque determination model 141. Specifically, the target shaft torque determination unit 151 inputs the target moisture content and sludge information as input data to the target shaft torque determination model 141 and determines the shaft torque output as the target shaft torque.

(6) Control unit 160
The control unit 160 controls the shaft torque of the rotation drive unit 50c (torque control) by controlling the controlled object in accordance with the target shaft torque (second target value) determined by the target shaft torque determination unit 151. For example, the control unit 160 determines operating parameters such that the shaft torque of the rotation drive unit 50c of the heating dehydrator 50 becomes the target shaft torque, and controls the controlled object. As an example, the control unit 160 determines the flocculant addition rate (an example of an operating parameter) in accordance with the target shaft torque, and controls the flocculant supply pump 40 (an example of a controlled object).
Furthermore, the control unit 160 performs feedback control based on the result of controlling the flocculant addition rate of the controlled object in accordance with the target shaft torque. For example, if the flocculant addition rate after control of the flocculant supply pump 40 is not the target addition rate (determined operating parameter), the control unit 160 controls the flocculant supply pump 40 so that the flocculant addition rate after control approaches the target addition rate.
The control unit 160 performs feedback control using, for example, PID (Proportional Integral Differential) control or model predictive control.

<1-3. Input/output on the control panel>
The functional configuration of the control panel 100 according to the first embodiment has been described above. Next, inputs and outputs in the control panel 100 according to the first embodiment will be described with reference to Fig. 3. Fig. 3 is a diagram showing an example of inputs and outputs in the control panel 100 according to the first embodiment.

3, a target moisture content and sludge information are input to the target shaft torque determination model 141. The target moisture content is acquired by the target value acquisition unit 120. The sludge information is acquired by the sludge information acquisition unit 130.
Based on the input target moisture content of the dewatered sludge and sludge information, target shaft torque determination model 141 outputs a target shaft torque for rotation drive unit 50c of heating dehydrator 50. The target shaft torque output from target shaft torque determination model 141 is input to control unit 160.
The control unit 160 controls the shaft torque of the rotation drive unit 50c (torque control) by controlling, for example, the flocculant addition rate (operation parameter) in accordance with the input target shaft torque. In this case, the control target is specifically the amount of flocculant supplied from the flocculant supply pump 40.
The control unit 160 acquires the flocculant addition rate after the control of the controlled object and performs feedback control.

<1-4. Control panel operation>
The inputs and outputs in the control panel 100 according to the first embodiment have been described above. Next, the operation of the control panel 100 according to the first embodiment will be described with reference to Fig. 4. Fig. 4 is a flowchart showing an example of the operation of the control panel 100 according to the first embodiment.

As shown in FIG. 4, first, the target value acquisition unit 120 of the control panel 100 acquires the target moisture content (step S101). For example, the target value acquisition unit 120 acquires the target moisture content from the incineration equipment 80.

Next, the sludge information acquisition unit 130 of the control panel 100 acquires sludge information (step S102). For example, the sludge information acquisition unit 130 acquires sludge information that includes at least the sludge temperature measured by the thermometer 52.

Next, the target shaft torque determination unit 151 of the control panel 100 determines the target shaft torque (step S103). For example, the target shaft torque determination unit 151 determines the target shaft torque using the target shaft torque determination model 141 stored in the memory unit 140 of the control panel 100. Specifically, the target shaft torque determination unit 151 determines the shaft torque output from the target shaft torque determination model 141 using the target moisture content acquired by the target value acquisition unit 120 and the sludge information acquired by the sludge information acquisition unit 130 as input data, as the target shaft torque.

Next, the control unit 160 of the control panel 100 controls the control target (step S104). For example, the control unit 160 controls the amount of flocculant supplied from the flocculant supply pump 40 in accordance with the target shaft torque determined by the target shaft torque determination unit 151.

Next, the control unit 160 performs feedback control (step S105). For example, the control unit 160 acquires the amount of flocculant added measured by the flocculant flow meter after controlling the flocculant addition rate, and performs feedback control so that the flocculant addition rate approaches the target addition rate.

As described above, the control panel 100 (control device) according to the first embodiment includes the target value acquisition unit 120 , the sludge information acquisition unit 130 , the target value determination unit 150 , and the control unit 160 .
The target value acquisition unit 120 acquires a first target value for controlling the heating dehydrator 50 (sludge dehydrator), which is determined according to the operating state of the incinerator 81 that incinerates the dehydrated sludge dehydrated by the heating dehydrator 50. The sludge information acquisition unit 130 acquires sludge information including at least the sludge temperature, which is the temperature of the dehydrated sludge. The target value determination unit 150 determines a second target value for controlling the control object that is correlated with the first target value, based on the relationship between the acquired first target value and the acquired sludge information. The control unit 160 controls the control object according to the determined second target value.

With this configuration, the control panel 100 according to the first embodiment controls the operation of the heating and dehydrating machine 50 in response to changes in the sludge temperature in the heating and dehydrating machine 50, thereby maintaining a constant moisture content in the dehydrated sludge discharged from the heating and dehydrating machine 50.

Therefore, the control panel 100 according to the first embodiment enables the dehydrator to operate at a stable moisture content even when the sludge temperature changes.

The control panel 100 according to the first embodiment also includes a target shaft torque determination unit 151 that determines the target shaft torque using the target shaft torque determination model 141. This allows the control panel 100 to accurately determine the target shaft torque.

<<2. Second embodiment>>
The first embodiment has been described above. Next, a second embodiment will be described with reference to Figs. 5 to 8. In the second embodiment, an example will be described in which only a target operating parameter determination model is used to determine the second target value. Note that, hereinafter, descriptions that overlap with the description of the first embodiment will be omitted as appropriate.

<2-1. Configuration of heating and dehydration system>
The configuration of the heating and dehydration system according to the second embodiment is similar to the configuration of the heating and dehydration system 1 according to the first embodiment, and therefore, a duplicated description will be omitted.

<2-2. Control panel functional configuration>
The configuration of the heating dehydration system according to the second embodiment has been described above. Next, the functional configuration of the control panel 100a according to the second embodiment will be described with reference to Fig. 5. Fig. 5 is a block diagram showing an example of the functional configuration of the control panel 100a according to the second embodiment.
As shown in FIG. 5, the control panel 100a includes a communication unit 110, a target value acquisition unit 120a, a sludge information acquisition unit 130a, a memory unit 140a, a target value determination unit 150a, a control unit 160a, and a control object priority determination unit 170.

(1) Communication unit 110
The functions of the communication unit 110 according to the second embodiment are similar to those of the communication unit 110 according to the first embodiment, and therefore, a duplicated description will be omitted.

(2) Target value acquisition unit 120a
The target value acquiring unit 120a acquires, as a first target value, for example, a shaft torque (hereinafter also referred to as a "target shaft torque") required to obtain dewatered sludge with a desired moisture content in the incinerator 81. As an example, the target value acquiring unit 120 acquires the target shaft torque output from a control device of the incineration equipment 80 or the like provided in the incineration equipment 80.

(3) Sludge information acquisition unit 130a
The sludge information acquiring unit 130a acquires, as sludge information, for example, sludge temperature, sludge mixing ratio, sludge supply amount, etc. The priority of the sludge information acquired by the sludge information acquiring unit 130a is, for example, sludge temperature = sludge mixing ratio >> sludge supply amount.

(4) Storage unit 140a
As shown in FIG. 5, the storage unit 140 a includes a target operating parameter determination model 142 .

(4-1) Target operating parameter determination model 142
The target operating parameter determination model 142 determines the target operating parameters based on the target shaft torque and sludge information of the rotary drive unit 50c of the heating dehydrator 50. The target operating parameter determination model 142 is, for example, a trained model that has been machine-learned to determine the relationship between the shaft torque of the rotary drive unit 50c, the sludge information, and the operating parameters.
That is, when the shaft torque of the rotary drive unit 50c and sludge information are input as input data, the target operating parameter determination model 142 can output operating parameters as output data.

The sludge information used as input data for the target operational parameter determination model 142 specifically includes the sludge temperature, sludge mixing ratio, sludge supply amount, etc., and includes at least the sludge temperature.
The operating parameters include the flocculant addition rate, injection pressure, back pressure shutoff rate, differential speed, centrifugal acceleration, sludge supply rate, heat medium temperature, heat medium flow rate, and polymer flocculant dosing rate.

The operating parameters output by the target operating parameter determination model 142 are set, for example, according to the type of sludge dehydrator. For example, for sludge dehydrators in general, the coagulant addition rate, sludge supply amount, and polymer coagulant injection rate are set to be output from the target operating parameter determination model 142. Furthermore, if the sludge dehydrator is a metal filter media type dehydrator, the injection pressure and back pressure shutoff rate are set to be output from the target operating parameter determination model 142. Furthermore, if the sludge dehydrator is a centrifugal dehydrator, the differential speed and centrifugal acceleration are set to be output from the target operating parameter determination model 142. Furthermore, if the sludge dehydrator is a heating dehydrator, the heat transfer medium temperature and heat transfer medium flow rate are set to be output from the target operating parameter determination model 142.

Any machine learning method may be applied to the target operating parameter determination model 142. Examples of the any machine learning method include linear regression, support vector machine regression, Gaussian process regression, decision tree, and neural network.
The target operating parameter determination model 142 is not limited to a trained model based on machine learning. For example, the target operating parameter determination model 142 may be a regression model, a regression calculation formula, a classification model, or the like.

(5) Target value determination unit 150a
The target value determination unit 150a determines a second target value for control of a control object that is correlated with the first target value based on the relationship between the first target value acquired by the target value acquisition unit 120a and the sludge information acquired by the sludge information acquisition unit 130a.
As shown in FIG. 5, the target value determining unit 150 a includes only a target operating parameter determining unit 152 .

(5-1) Target operating parameter determination unit 152
The target operating parameter determination unit 152 determines the target operating parameters from the relationship between the target shaft torque (first target value) acquired by the target value acquisition unit 120a and the sludge information acquired by the sludge information acquisition unit 130a. For example, the target operating parameters are determined using the target operating parameter determination model 142. In the second embodiment, the target operating parameter determination unit 152 uses the machine-learned target operating parameter determination model 142. Specifically, the target operating parameter determination unit 152 inputs the target shaft torque and sludge information as input data to the target operating parameter determination model 142 and determines the operating parameters output as the target operating parameters.

(6) Control unit 160a
The control unit 160a controls the controlled object in accordance with the target operating parameters (second target values) determined by the target operating parameter determination unit 152, thereby controlling the shaft torque of the rotation drive unit 50c.
For example, if the operating parameters include the flocculant addition rate, the control unit 160a controls the flocculant supply pump 40 (the controlled object) to adjust the amount of flocculant supplied from the flocculant supply pump 40 and thereby adjust the flocculant addition rate.
Furthermore, when the operating parameters include the press-fitting pressure, the control unit 160a adjusts the press-fitting pressure by controlling the rotation speed of the ribbon screw 50d (the control target).
Furthermore, when the operating parameters include a back pressure closing rate, the control unit 160a controls the back pressure plate 50G (control target) to adjust the opening degree of the back pressure plate 50G and thereby adjust the back pressure closing rate.
Furthermore, when the operation parameters include a differential speed, the control unit 160a adjusts the differential speed by controlling the rotation speed of the screw conveyor (the object to be controlled) in the centrifugal dehydrator.
Furthermore, when the operating parameters include centrifugal acceleration, the control unit 160a adjusts the centrifugal acceleration by controlling the speed of the bowl (the object to be controlled) in the centrifugal dehydrator.
In addition, when the operating parameters include a sludge supply amount, the control unit 160a adjusts the amount of concentrated sludge D supplied from the concentrated sludge supply pump 30 by controlling the concentrated sludge supply pump 30 (the object to be controlled), thereby adjusting the sludge supply amount.
Furthermore, when the operating parameters include the heat medium temperature, the control unit 160a adjusts the heat medium temperature by, for example, controlling the amount of heat medium supplied to the boiler 82 from a heat medium supply facility (not shown, controlled object).
In addition, when the operating parameters include the heat medium flow rate, the control unit 160a controls the heat medium supply pump 60 to adjust the amount of heat medium (hot water H) supplied from the heat medium supply pump 60, thereby adjusting the heat medium flow rate.
In addition, when the operating parameters include the polymer flocculant dosing rate, the control unit 160a adjusts the polymer flocculant dosing rate by controlling the polymer flocculant supply pump (not shown, controlled object) to adjust the amount of polymer flocculant B supplied to the organic sludge A or concentrated sludge D.

The control unit 160a also performs feedback control based on the results of controlling the controlled object in accordance with the target operating parameters. As an example, if the flocculant addition rate after control of the flocculant supply pump 40 does not match the target operating parameters, the control unit 160a controls the flocculant supply pump 40 so that the flocculant addition rate after control approaches the target operating parameters. Feedback control for other controlled objects is similar.

(7) Control Object Priority Determination Unit 170
When a plurality of target operating parameters are determined, the control object priority determination unit 170 determines the priority for controlling the control object corresponding to each target operating parameter.

Here, the priority of the control object will be explained with reference to Figure 6. Figure 6 is a diagram showing an example of control of the priority of the control object according to the second embodiment. The vertical axis of the graph shown in Figure 6 shows the control output of each control object, and the horizontal axis shows the control output of the control unit. Note that Figure 6 shows an example in which the heating dehydrator 50 is a metal filter media dehydrator, and the operating parameters are the flocculant addition rate, injection pressure, and back pressure shut-off rate.

As shown in FIG. 6, the priority of the control output (i.e., the priority of the controlled object) is set as follows, in descending order of priority: injection pressure, back pressure shutoff rate, and flocculant addition rate.
The priority is set taking into consideration cost and controllability. When cost is taken into consideration, a control output with a high cost is set to a low priority, and a control output with a low cost is set to a high priority. For example, in the case of the flocculant addition rate shown in Figure 6, it is necessary to add flocculant to increase the flocculant addition rate, but since the cost of flocculant is high, the priority is set to a low priority. When controllability is taken into consideration, a control output with high controllability is set to a high priority, and a control output with low controllability is set to a low priority. For example, a control output with high reproducibility of the relationship between changes in the controlled variable and changes in the torque of the controlled object, or a control output with fast response, is evaluated as having high controllability.
The timing of the start and end of the control output of each control target and the gradient, which is the rate of change of the controlled variable, are adjusted according to the characteristics of the equipment and the condition of the target sludge.
The control output at the start of control is appropriate for the input target shaft torque according to the target operating parameter determination model 142. Errors due to the accuracy of the target operating parameter determination model 142 are adjusted by torque control (feedback control) by the control unit 160a.
By using the target operating parameter determination model 142, the target operating parameter determination unit 152 can instantaneously output optimal control variables based on past operating data and operator know-how.
If each control variable is manually operated separately before automatic control by the control panel 100a is initiated, it is possible to switch to standard operation by starting automatic control by the control panel 100a. Note that the control shown in Figure 6 may be conditionally branched as in an IF-THEN rule.

<2-3. Input/output on the control panel>
The functional configuration of the control panel 100a according to the second embodiment has been described above. Next, inputs and outputs of the control panel 100a according to the second embodiment will be described with reference to Fig. 7. Fig. 7 is a diagram showing an example of inputs and outputs of the control panel 100a according to the second embodiment. Note that Fig. 7 shows an example in which the heating dehydrator 50 is a metal filter media dehydrator, and the operating parameters are the flocculant addition rate, injection pressure, and back pressure shut-off rate.

7, a target shaft torque and sludge information are input to the target operating parameter determination model 142. The target shaft torque is acquired by the target value acquisition unit 120a. The sludge information is acquired by the sludge information acquisition unit 130a.
The target operating parameter determination model 142 outputs target operating parameters based on the input target shaft torque and sludge information. The target operating parameters output from the target operating parameter determination model 142 are input to the control object priority determination unit 170.
The control object priority determination unit 170 inputs target operating parameters to the control unit 160a in accordance with the control object priorities.
The control unit 160a controls the control target in accordance with the input target operating parameters. The control unit 160a also acquires the measured values of the operating parameters measured for each control target after each control, and performs feedback control so that the measured values approach the target operating parameters.

<2-4. Control panel operation>
The inputs and outputs of the control panel 100a according to the second embodiment have been described above. Next, the operation of the control panel 100a according to the second embodiment will be described with reference to Fig. 8. Fig. 8 is a flowchart showing an example of the operation of the control panel 100a according to the second embodiment.

As shown in FIG. 8, first, the target value acquisition unit 120a of the control panel 100a acquires the target shaft torque (step S201). For example, the target value acquisition unit 120a acquires the target shaft torque from the incineration equipment 80.

Next, the sludge information acquisition unit 130a of the control panel 100a acquires sludge information (step S202). For example, the sludge information acquisition unit 130a acquires sludge information that includes at least the sludge temperature measured by the thermometer 52.

Next, the target operating parameter determination unit 152 of the control panel 100a determines the target operating parameters (step S203). For example, the target operating parameter determination unit 152 determines the target operating parameters using the target operating parameter determination model 142 stored in the memory unit 140a of the control panel 100. Specifically, the target operating parameter determination unit 152 determines the operating parameters output from the target operating parameter determination model 142 using the target shaft torque acquired by the target value acquisition unit 120a and the sludge information acquired by the sludge information acquisition unit 130a as input data, as the target operating parameters.

Next, the control object priority determination unit 170 of the control panel 100a determines the priority for controlling the control object corresponding to each target operating parameter (step S204).

Next, the control unit 160a of the control panel 100a controls the control objects (step S205). For example, the control unit 160a controls each control object according to the target operating parameters determined by the target operating parameter determination unit 152, in accordance with the priorities determined by the control object priority determination unit 170.

Next, the control unit 160a performs feedback control (step S206). For example, the control unit 160a acquires the measurement values measured for each control object after each control, and performs feedback control so that the measurement values approach the target operating parameters.

As described above, the control panel 100a (control device) according to the second embodiment includes a target value acquisition unit 120a, a sludge information acquisition unit 130a, a target value determination unit 150a, and a control unit 160a.
The target value acquisition unit 120a acquires a first target value for controlling the heating dehydrator 50 (sludge dehydrator), which is determined according to the operating state of the incinerator 81 that incinerates the dehydrated sludge dehydrated by the heating dehydrator 50. The sludge information acquisition unit 130a acquires sludge information including at least the sludge temperature, which is the temperature of the dehydrated sludge. The target value determination unit 150a determines a second target value for controlling a control object that is correlated with the first target value, based on the relationship between the acquired first target value and the acquired sludge information. The control unit 160a controls the control object according to the determined second target value.

With this configuration, the control panel 100a according to the second embodiment controls the operation of the heating and dehydrating machine 50 in response to changes in the sludge temperature in the heating and dehydrating machine 50, thereby maintaining a constant moisture content in the dehydrated sludge discharged from the heating and dehydrating machine 50.

Therefore, the control panel 100a according to the second embodiment enables the dehydrator to operate at a stable moisture content even when the sludge temperature changes.

The control panel 100a according to the second embodiment also includes a target operating parameter determination unit 152 that determines target operating parameters using a target operating parameter determination model 142. This enables the control panel 100a to reduce the time it takes for the shaft torque to reach the target shaft torque by controlling the operating parameters.

<<3. Third embodiment>>
The second embodiment has been described above. Next, a third embodiment will be described with reference to Figs. 9 to 11. In the third embodiment, an example will be described in which a target shaft torque determination model 141 and a target operating parameter determination model 142 are used to determine the second target value. Note that, in the following, descriptions that overlap with the descriptions in the first and second embodiments will be omitted as appropriate.

<3-1. Configuration of heating and dehydration system>
The configuration of the heating and dehydration system according to the third embodiment is similar to the configuration of the heating and dehydration system 1 according to the first embodiment, and therefore, a duplicated description will be omitted.

<3-2. Control panel functional configuration>
The configuration of the heating dehydration system according to the third embodiment has been described above. Next, the functional configuration of the control panel 100b according to the third embodiment will be described with reference to Fig. 9. Fig. 9 is a block diagram showing an example of the functional configuration of the control panel 100b according to the third embodiment.
As shown in FIG. 9, the control panel 100b includes a communication unit 110, a target value acquisition unit 120, a sludge information acquisition unit 130b, a memory unit 140b, a target value determination unit 150b, a control unit 160b, and a control object priority determination unit 170.

(1) Communication unit 110
The functions of the communication unit 110 according to the third embodiment are similar to those of the communication unit 110 according to the first embodiment, and therefore, a duplicated description will be omitted.

(2) Target value acquisition unit 120
The function of the target value acquisition unit 120 according to the third embodiment is similar to the function of the target value acquisition unit 120 according to the first embodiment, and therefore a duplicated description will be omitted.

(3) Sludge information acquisition unit 130b
The sludge information acquisition unit 130b has, for example, the functions of the sludge information acquisition unit 130 according to the first embodiment and the functions of the sludge information acquisition unit 130a according to the second embodiment, and therefore, overlapping descriptions will be omitted.

(4) Storage unit 140b
As shown in FIG. 9, the storage unit 140 b has a target shaft torque determination model 141 and a target operating parameter determination model 142 .

(4-1) Target shaft torque determination model 141
The function of the target shaft torque determination model 141 according to the third embodiment is similar to the function of the target shaft torque determination model 141 according to the first embodiment, and therefore a duplicated description will be omitted.

(4-2) Target operating parameter determination model 142
The function of the target operating parameter determination model 142 according to the third embodiment is similar to the function of the target operating parameter determination model 142 according to the second embodiment, and therefore a duplicated description will be omitted.
The target operating parameter determination model 142 according to the third embodiment does not use, as input data, the target shaft torque acquired by the target value acquisition unit 120. The target operating parameter determination model 142 according to the third embodiment uses, as input data, the target shaft torque determined by the target shaft torque determination model 141 and the sludge information acquired by the sludge information acquisition unit 130b.

(5) Target value determination unit 150b
The target value determination unit 150b determines a second target value for control of a control object that is correlated with the first target value based on the relationship between the first target value acquired by the target value acquisition unit 120 and the sludge information acquired by the sludge information acquisition unit 130b.
As shown in FIG. 9, the target value determination unit 150 b includes a target shaft torque determination unit 151 and a target operating parameter determination unit 152 .

(5-1) Target shaft torque determination unit 151
The function of the target shaft torque determiner 151 according to the third embodiment is similar to the function of the target shaft torque determiner 151 according to the first embodiment, and therefore a duplicated description will be omitted.

(5-2) Target operating parameter determination unit 152
The function of the target operating parameter determination unit 152 according to the third embodiment is similar to the function of the target operating parameter determination unit 152 according to the second embodiment, and therefore a duplicated description will be omitted.
The target operating parameter determination unit 152 according to the third embodiment does not use the target shaft torque acquired by the target value acquisition unit 120 as input data for the target operating parameter determination model 142. The target operating parameter determination unit 152 according to the third embodiment uses the target shaft torque determined by the target shaft torque determination model 141 and the sludge information acquired by the sludge information acquisition unit 130b as input data for the target operating parameter determination model 142.

(6) Control unit 160b
The control unit 160b has, for example, the functions of the control unit 160 according to the first embodiment and the functions of the control unit 160a according to the second embodiment, so redundant description will be omitted.

(7) Control Object Priority Determination Unit 170
The function of the control object priority determination unit 170 according to the third embodiment is similar to the function of the control object priority determination unit 170 according to the second embodiment, and therefore a duplicated description will be omitted.

<3-3. Input/output on the control panel>
The functional configuration of the control panel 100b according to the third embodiment has been described above. Next, inputs and outputs of the control panel 100b according to the third embodiment will be described with reference to Fig. 10. Fig. 10 is a diagram showing an example of inputs and outputs of the control panel 100b according to the third embodiment. Note that Fig. 10 shows an example in which the heating dehydrator 50 is a metal filter media dehydrator, and the operating parameters are the flocculant addition rate, injection pressure, and back pressure shut-off rate.

10, a target moisture content and sludge information are input to the target shaft torque determination model 141. The target moisture content is acquired by the target value acquisition unit 120. The sludge information is acquired by the sludge information acquisition unit 130b.
The target shaft torque and sludge information are input to the target operating parameter determination model 142. The target shaft torque is determined by the target shaft torque determination model 141. The sludge information is acquired by the sludge information acquisition unit 130b.
The target operating parameter determination model 142 outputs target operating parameters based on the input target shaft torque and sludge information. The target operating parameters output from the target operating parameter determination model 142 are input to the control object priority determination unit 170.
The control object priority determination unit 170 inputs target operating parameters to the control unit 160b in accordance with the control object priorities.
The control unit 160b controls the control target in accordance with the input target operating parameters. The control unit 160b also acquires the measured values of the operating parameters measured in each control target after each control, and performs feedback control so that the measured values approach the target operating parameters.

<3-4. Control panel operation>
The inputs and outputs of the control panel 100b according to the third embodiment have been described above. Next, the operation of the control panel 100b according to the third embodiment will be described with reference to Fig. 11. Fig. 11 is a flowchart showing an example of the operation of the control panel 100b according to the third embodiment.

As shown in FIG. 11, first, the target value acquisition unit 120 of the control panel 100b acquires the target moisture content (step S301). For example, the target value acquisition unit 120 acquires the target moisture content from the incineration equipment 80.

Next, the sludge information acquisition unit 130b of the control panel 100b acquires sludge information (step S302). For example, the sludge information acquisition unit 130b acquires sludge information that includes at least the sludge temperature measured by the thermometer 52.

Next, the target shaft torque determination unit 151 of the control panel 100b determines the target shaft torque (step S303). For example, the target shaft torque determination unit 151 determines the target shaft torque using the target shaft torque determination model 141 stored in the memory unit 140b of the control panel 100b. Specifically, the target shaft torque determination unit 151 determines the shaft torque output from the target shaft torque determination model 141 using the target moisture content acquired by the target value acquisition unit 120 and the sludge information acquired by the sludge information acquisition unit 130b as input data as the target shaft torque.

Next, the target operating parameter determination unit 152 of the control panel 100b determines the target operating parameters (step S304). For example, the target operating parameter determination unit 152 determines the target operating parameters using the target operating parameter determination model 142 stored in the memory unit 140b of the control panel 100b. Specifically, the target operating parameter determination unit 152 determines the target operating parameters to be the operating parameters output from the target operating parameter determination model 142 using the target shaft torque determined by the target shaft torque determination model 141 and the sludge information acquired by the sludge information acquisition unit 130b as input data.

Next, the control object priority determination unit 170 of the control panel 100b determines the priority for controlling the control object corresponding to each target operating parameter (step S305).

Next, the control unit 160b of the control panel 100b controls the control objects (step S306). For example, the control unit 160b controls each control object according to the target operating parameters determined by the target operating parameter determination unit 152, in accordance with the priorities determined by the control object priority determination unit 170.

Next, the control unit 160b performs feedback control (step S307). For example, the control unit 160b acquires the measurement values measured for each control object after each control, and performs feedback control so that the measurement values approach the target operating parameters.

As described above, the control panel 100b (control device) according to the third embodiment includes the target value acquisition unit 120, the sludge information acquisition unit 130b, the target value determination unit 150b, and the control unit 160b.
The target value acquisition unit 120 acquires a first target value for controlling the heating dehydrator 50 (sludge dehydrator), which is determined according to the operating state of the incinerator 81 that incinerates the dehydrated sludge dehydrated by the heating dehydrator 50. The sludge information acquisition unit 130b acquires sludge information including at least the sludge temperature, which is the temperature of the dehydrated sludge. The target value determination unit 150b determines a second target value for controlling the control object that is correlated with the first target value, based on the relationship between the acquired first target value and the acquired sludge information. The control unit 160b controls the control object according to the determined second target value.

With this configuration, the control panel 100b according to the third embodiment controls the operation of the heating and dehydrating machine 50 in response to changes in the sludge temperature in the heating and dehydrating machine 50, thereby maintaining a constant moisture content in the dehydrated sludge discharged from the heating and dehydrating machine 50.

Therefore, the control panel 100b according to the third embodiment enables the dehydrator to operate at a stable moisture content even when the sludge temperature changes.

The control panel 100b according to the third embodiment also includes a target shaft torque determination unit 151 that determines the target shaft torque using a target shaft torque determination model 141, and a target operating parameter determination unit 152 that determines the target operating parameters using a target operating parameter determination model 142. As a result, compared to the control panel 100 according to the first embodiment and the control panel 100a according to the second embodiment, the control panel 100b controls the operating parameters in addition to the shaft torque, thereby enabling more accurate control of the moisture content of the dewatered sludge discharged from the heating dehydrator 50.

<<4. Fourth embodiment>>
The third embodiment has been described above. Next, a fourth embodiment will be described with reference to FIGS. 12 to 14. In the fourth embodiment, an example will be described in which, when only the target shaft torque determination model 141 is used to determine the second target value, the operating parameters of the controlled object are readjusted based on the results of controlling the shaft torque by adjusting the operating parameters of the controlled object. Note that, hereinafter, descriptions that overlap with the descriptions of the first to third embodiments will be omitted as appropriate.

<4-1. Configuration of heating and dehydration system>
The configuration of the heating and dehydration system according to the fourth embodiment is similar to the configuration of the heating and dehydration system 1 according to the first embodiment, and therefore, a duplicated description will be omitted.

<4-2. Control panel functional configuration>
The configuration of the heating dehydration system according to the fourth embodiment has been described above. Next, the functional configuration of the control panel 100c according to the fourth embodiment will be described with reference to Fig. 12. Fig. 12 is a block diagram showing an example of the functional configuration of the control panel 100c according to the fourth embodiment.
As shown in FIG. 12, the control panel 100c includes a communication unit 110, a target value acquisition unit 120, a sludge information acquisition unit 130, a memory unit 140, a target value determination unit 150, a control unit 160c, and a control object priority determination unit 170.

(1) Communication unit 110
The functions of the communication unit 110 according to the fourth embodiment are similar to those of the communication unit 110 according to the first embodiment, and therefore, a duplicated description will be omitted.

(2) Target value acquisition unit 120
The function of the target value acquisition unit 120 according to the fourth embodiment is similar to the function of the target value acquisition unit 120 according to the first embodiment, and therefore a duplicated description will be omitted.

(3) Sludge information acquisition unit 130
The function of the sludge information acquisition unit 130 according to the fourth embodiment is similar to the function of the sludge information acquisition unit 130 according to the first embodiment, and therefore a duplicated description will be omitted.

(4) Storage unit 140
The function of the storage unit 140 according to the fourth embodiment is similar to the function of the storage unit 140 according to the first embodiment, and therefore a duplicated description will be omitted.
As shown in FIG. 12, the storage unit 140 according to the fourth embodiment has a target shaft torque determination model 141 .

(4-1) Target shaft torque determination model 141
The function of the target shaft torque determination model 141 according to the fourth embodiment is similar to the function of the target shaft torque determination model 141 according to the first embodiment, and therefore a duplicated description will be omitted.

(5) Target value determination unit 150
The function of the target value determination unit 150 according to the fourth embodiment is similar to the function of the target value determination unit 150 according to the first embodiment, and therefore a duplicated description will be omitted.
As shown in FIG. 12 , the target value determination unit 150 according to the fourth embodiment includes a target shaft torque determination unit 151 .

(5-1) Target shaft torque determination unit 151
The function of the target shaft torque determiner 151 according to the fourth embodiment is similar to the function of the target shaft torque determiner 151 according to the first embodiment, and therefore a duplicated description will be omitted.

(6) Control unit 160c
The control unit 160c has the same functions as the control units in the first to third embodiments, and therefore a duplicated description will be omitted.

The control unit 160c further has a function of performing feedback control to readjust the operating parameters of the controlled object based on the results of control performed to adjust the shaft torque of the rotation drive unit 50c to the determined target shaft torque by adjusting the operating parameters of the controlled object. That is, when the shaft torque does not reach the target shaft torque through torque control based on the target shaft torque, the control unit 160c adjusts the operating parameters through feedback control of the torque control to control the shaft torque so that it approaches the target shaft torque. This allows the control unit 160c to shorten the time it takes for the shaft torque to reach the target shaft torque.
The control unit 160c performs feedback control using, for example, PID control or model predictive control.
The operating parameters controlled by the feedback control of the control unit 160c include, for example, the flocculant addition rate, injection pressure, back pressure closure rate, differential speed, centrifugal acceleration, sludge supply rate, heat medium temperature, heat medium flow rate, and polymer flocculant injection rate.

(7) Control Object Priority Determination Unit 170
The function of the control object priority determination unit 170 according to the fourth embodiment is similar to the function of the control object priority determination unit 170 according to the second embodiment, and therefore a duplicated description will be omitted.
The control object priority determination unit 170 according to the fourth embodiment determines the priority of the control object based on the target operating parameters determined by the control unit 160c.

<4-3. Input/output on the control panel>
The functional configuration of the control panel 100c according to the fourth embodiment has been described above. Next, inputs and outputs of the control panel 100c according to the fourth embodiment will be described with reference to Fig. 13. Fig. 13 is a diagram showing an example of inputs and outputs of the control panel 100c according to the fourth embodiment. Note that Fig. 13 shows an example in which the heating dehydrator 50 is a metal filter media dehydrator, and the operating parameters are the flocculant addition rate, injection pressure, and back pressure shut-off rate.

13 , a target moisture content and sludge information are input to the target shaft torque determination model 141. The target moisture content is acquired by the target value acquisition unit 120. The sludge information is acquired by the sludge information acquisition unit 130.
Based on the input target moisture content of the dewatered sludge and sludge information, target shaft torque determination model 141 outputs a target shaft torque for rotation drive unit 50c of heating dehydrator 50. The target shaft torque output from target shaft torque determination model 141 is input to control unit 160c.
The control unit 160c outputs target operating parameters based on at least one of the target shaft torque input from the target shaft torque determination model 141 and the shaft torque measured after controlling the controlled object. The target operating parameters output from the control unit 160c are input to the controlled object priority determination unit 170.
The control object priority determination unit 170 inputs target operating parameters to the control unit 160c in accordance with the control object priorities.
The control unit 160c performs torque control by controlling the controlled object in accordance with the input target operating parameters. The control unit 160c acquires a measured value of the shaft torque after controlling the controlled object and performs feedback control.

<4-4. Control panel operation>
The inputs and outputs of the control panel 100c according to the fourth embodiment have been described above. Next, the operation of the control panel 100c according to the fourth embodiment will be described with reference to Fig. 14. Fig. 14 is a flowchart showing an example of the operation of the control panel 100c according to the fourth embodiment.

The processing from steps S401 to S403 shown in Figure 14 is the same as the processing from steps S101 to S103 described with reference to Figure 4, so redundant description will be omitted.

After step S403, the control unit 160c of the control panel 100c determines target operating parameters (step S404). For example, the control unit 160c determines the target operating parameters based on the target shaft torque.

Next, the control object priority determination unit 170 of the control panel 100c determines the priority for controlling the control objects corresponding to each target operating parameter determined by the control unit 160c (step S405).

Next, the control unit 160c of the control panel 100c controls the control objects (step S406). For example, the control unit 160c controls each control object according to the target operating parameters determined by the control unit 160c, in accordance with the priorities determined by the control object priority determination unit 170.

Next, the control unit 160c performs feedback control (step S407). For example, the control unit 160b acquires the measured values measured for each control object after each control, and performs feedback control so that the measured values approach the target shaft torque and target operating parameters.

As described above, the control panel 100c (control device) according to the fourth embodiment includes the target value acquisition unit 120, the sludge information acquisition unit 130, the target value determination unit 150, and the control unit 160c.
The target value acquisition unit 120 acquires a first target value for controlling the heating dehydrator 50 (sludge dehydrator), which is determined according to the operating state of the incinerator 81 that incinerates the dehydrated sludge dehydrated by the heating dehydrator 50. The sludge information acquisition unit 130 acquires sludge information including at least the sludge temperature, which is the temperature of the dehydrated sludge. The target value determination unit 150 determines a second target value for controlling the control object that is correlated with the first target value, based on the relationship between the acquired first target value and the acquired sludge information. The control unit 160c controls the control object according to the determined second target value.

With this configuration, the control panel 100c according to the fourth embodiment controls the operation of the heating and dehydrating machine 50 in response to changes in the sludge temperature in the heating and dehydrating machine 50, thereby maintaining a constant moisture content in the dehydrated sludge discharged from the heating and dehydrating machine 50.

Therefore, the control panel 100c according to the fourth embodiment enables the dehydrator to operate at a stable moisture content even when the sludge temperature changes.

Furthermore, the control unit 160c of the control panel 100c according to the fourth embodiment performs feedback control based on the shaft torque measured after adjusting the operating parameters based on the target shaft torque determined by the target shaft torque determination model 141. As a result, the control panel 100c can shorten the time it takes for the shaft torque to reach the target shaft torque by readjusting the operating parameters based on the measured value of the shaft torque after torque control.

<<5. Fifth embodiment>>
The fourth embodiment has been described above. Next, a fifth embodiment will be described with reference to FIGS. 15 to 17. In the fifth embodiment, an example will be described in which, when only the target operating parameter determination model 142 is used to determine the second target value, the operating parameters of the controlled object are readjusted (corrected) based on the results of controlling the shaft torque by adjusting the operating parameters of the controlled object. Note that, hereinafter, descriptions that overlap with the descriptions of the first to fourth embodiments will be omitted as appropriate.

<5-1. Configuration of heating and dehydration system>
The configuration of the heating and dehydration system according to the fifth embodiment is similar to the configuration of the heating and dehydration system 1 according to the first embodiment, and therefore, a duplicated description will be omitted.

<5-2. Control panel functional configuration>
The configuration of the heating dehydration system according to the fifth embodiment has been described above. Next, the functional configuration of the control panel 100d according to the fifth embodiment will be described with reference to Fig. 15. Fig. 15 is a block diagram showing an example of the functional configuration of the control panel 100d according to the fifth embodiment.
As shown in FIG. 15, the control panel 100d includes a communication unit 110, a target value acquisition unit 120d, a sludge information acquisition unit 130, a memory unit 140d, a target value determination unit 150d, a control unit 160d, and a control object priority determination unit 170.

(1) Communication unit 110
The functions of the communication unit 110 according to the fifth embodiment are similar to those of the communication unit 110 according to the first embodiment, and therefore, a duplicated description will be omitted.

(2) Target value acquisition unit 120d
The function of the target value acquisition unit 120d according to the fifth embodiment is similar to the function of the target value acquisition unit 120a according to the second embodiment, and therefore a duplicated description will be omitted.

(3) Sludge information acquisition unit 130
The function of the sludge information acquisition unit 130 according to the fifth embodiment is similar to the function of the sludge information acquisition unit 130 according to the first embodiment, and therefore a duplicated description will be omitted.

(4) Storage section 140d
The function of the storage unit 140d according to the fifth embodiment is similar to the function of the storage unit 140 according to the first embodiment, and therefore a duplicated description will be omitted.
As shown in FIG. 15, a storage unit 140 d according to the fifth embodiment includes a target operating parameter determination model 142 .

(4-1) Target operating parameter determination model 142
The function of the target operating parameter determination model 142 according to the fifth embodiment is similar to the function of the target operating parameter determination model 142 according to the second embodiment, and therefore a duplicated description will be omitted.

(5) Target value determination unit 150d
The function of the target value determination unit 150d according to the fifth embodiment is similar to the function of the target value determination unit 150a according to the second embodiment, and therefore a duplicated description will be omitted.
As shown in FIG. 15, a target value determination unit 150 d according to the fifth embodiment includes a target operating parameter determination unit 152 .

(5-1) Target operating parameter determination unit 152
The function of the target operating parameter determination unit 152 according to the fifth embodiment is similar to the function of the target operating parameter determination unit 152 according to the second embodiment, and therefore a duplicated description will be omitted.

(6) Control unit 160d
The control unit 160d has the same functions as the control units in the first to fourth embodiments, and therefore a duplicated description will be omitted.
The control unit 160d further has a function of performing feedback control to adjust (correct) the target operating parameters determined by the target operating parameter determination model 142 based on the control results of the control object according to the target shaft torque. That is, when the shaft torque does not reach the target shaft torque through torque control based on the target shaft torque, the control unit 160d performs control to bring the shaft torque closer to the target shaft torque by adjusting the operating parameters through feedback control of the torque control. In this way, the control unit 160d can shorten the time it takes for the shaft torque to reach the target shaft torque.
The control unit 160d performs feedback control using, for example, PID control or model predictive control.
The operating parameters controlled by the feedback control of the control unit 160d include, for example, the flocculant addition rate, injection pressure, back pressure closure rate, differential speed, centrifugal acceleration, sludge supply rate, heat medium temperature, heat medium flow rate, and polymer flocculant injection rate.

(7) Control Object Priority Determination Unit 170
The function of the control object priority determination unit 170 according to the fifth embodiment is similar to the function of the control object priority determination unit 170 according to the second embodiment, and therefore a duplicated description will be omitted.
In addition, the control object priority determination unit 170 according to the fifth embodiment determines the priority of the control object based on the target operating parameters determined by the target operating parameter determination model 142 after the target operating parameters have been corrected by the control unit 160d.

<5-3. Input/output on the control panel>
The functional configuration of the control panel 100d according to the fifth embodiment has been described above. Next, inputs and outputs of the control panel 100d according to the fifth embodiment will be described with reference to Fig. 16. Fig. 16 is a diagram showing an example of inputs and outputs of the control panel 100d according to the fifth embodiment. Note that Fig. 16 shows an example in which the heating dehydrator 50 is a metal filter media dehydrator, and the operating parameters are the flocculant addition rate, injection pressure, and back pressure shut-off rate.

As shown in FIG. 16, the control unit 160d controls the torque of the controlled object (torque control) in accordance with the input target axial torque.
The target shaft torque and sludge information are input to the target operating parameter determination model 142. The target shaft torque is acquired by the target value acquisition unit 120d. The sludge information is acquired by the sludge information acquisition unit 130.
The target operating parameter determination model 142 outputs target operating parameters based on the input target shaft torque and sludge information.
The control unit 160d acquires the measured value of the shaft torque after control of the control object and performs feedback control. The control unit 160d acquires, through the feedback control, a correction value for correcting the target operating parameter determined by the target operating parameter determination model 142. The control unit 160d inputs the target operating parameter corrected with the acquired correction value to the control object priority determination unit 170.
The control object priority determination unit 170 inputs target operating parameters to the control unit 160d in accordance with the control object priorities.
The control unit 160d controls the controlled object in accordance with the input target shaft torque and target operating parameters. The control unit 160d acquires a measured value of the shaft torque after the controlled object is controlled, and performs feedback control.

<5-4. Control panel operation>
The inputs and outputs of the control panel 100d according to the fifth embodiment have been described above. Next, the operation of the control panel 100d according to the fifth embodiment will be described with reference to Fig. 17. Fig. 17 is a flowchart showing an example of the operation of the control panel 100d according to the fifth embodiment.

The processing from steps S501 to S503 shown in Figure 17 is the same as the processing from steps S201 to S203 described with reference to Figure 8, so redundant explanations will be omitted.

The processing from steps S504 to S506 shown in Figure 17 is the same as the processing from steps S405 to S407 described with reference to Figure 14, so redundant explanation will be omitted.

Next, the control unit 160d corrects the target operating parameters (step S507). For example, the control unit 160d obtains the correction values of the target operating parameters determined by the target operating parameter determination model 142 through feedback control. The control unit 160d corrects the target operating parameters using the obtained correction values. The control unit 160d then inputs the corrected target operating parameters to the control object priority determination unit 170.

As described above, the control panel 100d (control device) according to the fifth embodiment includes a target value acquisition unit 120d, a sludge information acquisition unit 130, a target value determination unit 150d, and a control unit 160d.
The target value acquisition unit 120d acquires a first target value for controlling the heating dehydrator 50 (sludge dehydrator), which is determined according to the operating state of the incinerator 81 that incinerates the dehydrated sludge dehydrated by the heating dehydrator 50. The sludge information acquisition unit 130 acquires sludge information including at least the sludge temperature, which is the temperature of the dehydrated sludge. The target value determination unit 150d determines a second target value for controlling the control object that is correlated with the first target value, based on the relationship between the acquired first target value and the acquired sludge information. The control unit 160d controls the control object according to the determined second target value.

With this configuration, the control panel 100d according to the fifth embodiment controls the operation of the heating and dehydrating machine 50 in accordance with changes in the sludge temperature in the heating and dehydrating machine 50, thereby maintaining a constant moisture content in the dehydrated sludge discharged from the heating and dehydrating machine 50.

Therefore, the control panel 100d according to the fifth embodiment enables the dehydrator to operate at a stable moisture content even when the sludge temperature changes.

In addition, the control unit 160d of the control panel 100d according to the fifth embodiment corrects the target operating parameters determined by the target operating parameter determination model 142 based on the results of feedback control of the torque control. This enables the control panel 100d to shorten the time it takes for the shaft torque to reach the target shaft torque through torque control, and to perform torque control with higher accuracy.

<<6. Sixth Embodiment>>
The fifth embodiment has been described above. Next, a sixth embodiment will be described with reference to FIGS. 18 to 20. In the sixth embodiment, an example will be described in which, when a target shaft torque determination model 141 and a target operating parameter determination model 142 are used to determine the second target value, the operating parameters of the controlled object are readjusted (corrected) based on the results of controlling the shaft torque by adjusting the operating parameters of the controlled object. Note that, hereinafter, descriptions that overlap with the descriptions of the first to fifth embodiments will be omitted as appropriate.

<6-1. Configuration of heating and dehydration system>
The configuration of the heating and dehydration system according to the sixth embodiment is similar to the configuration of the heating and dehydration system 1 according to the first embodiment, and therefore, a duplicated description will be omitted.

<6-2. Control panel functional configuration>
The configuration of the heating dehydration system according to the sixth embodiment has been described above. Next, the functional configuration of the control panel 100e according to the sixth embodiment will be described with reference to Fig. 18. Fig. 18 is a block diagram showing an example of the functional configuration of the control panel 100e according to the sixth embodiment.
As shown in FIG. 18, the control panel 100e includes a communication unit 110, a target value acquisition unit 120, a sludge information acquisition unit 130e, a memory unit 140e, a target value determination unit 150e, a control unit 160e, and a control object priority determination unit 170.

(1) Communication unit 110
The functions of the communication unit 110 according to the sixth embodiment are similar to those of the communication unit 110 according to the first embodiment, and therefore, a duplicated description will be omitted.

(2) Target value acquisition unit 120
The function of the target value acquisition unit 120 according to the sixth embodiment is similar to the function of the target value acquisition unit 120 according to the first embodiment, and therefore a duplicated description will be omitted.

(3) Sludge information acquisition unit 130e
The function of the sludge information acquisition unit 130e according to the sixth embodiment is similar to the function of the sludge information acquisition unit 130b according to the third embodiment, and therefore a duplicated description will be omitted.

(4) Storage unit 140e
The function of the storage unit 140e according to the sixth embodiment is similar to the function of the storage unit 140b according to the third embodiment, and therefore a duplicated description will be omitted.
As shown in FIG. 18, a storage unit 140 e according to the sixth embodiment has a target shaft torque determination model 141 and a target operating parameter determination model 142 .

(4-1) Target shaft torque determination model 141
The function of the target shaft torque determination model 141 according to the sixth embodiment is similar to the function of the target shaft torque determination model 141 according to the third embodiment, and therefore a duplicated description will be omitted.

(4-2) Target operating parameter determination model 142
The function of the target operating parameter determination model 142 according to the sixth embodiment is similar to the function of the target operating parameter determination model 142 according to the third embodiment, and therefore a duplicated description will be omitted.

(5) Target value determination unit 150e
The function of the target value determination unit 150e according to the sixth embodiment is similar to the function of the target value determination unit 150b according to the third embodiment, and therefore a duplicated description will be omitted.
As shown in FIG. 18, a target value determination unit 150 e according to the sixth embodiment includes a target shaft torque determination unit 151 and a target operating parameter determination unit 152 .

(5-1) Target shaft torque determination unit 151
The function of the target shaft torque determiner 151 according to the sixth embodiment is similar to the function of the target shaft torque determiner 151 according to the third embodiment, and therefore a duplicated description will be omitted.

(5-2) Target operating parameter determination unit 152
The function of the target operating parameter determination unit 152 according to the sixth embodiment is similar to the function of the target operating parameter determination unit 152 according to the third embodiment, and therefore a duplicated description will be omitted.

(6) Control unit 160e
The control unit 160e has the same functions as the control units in the first to fifth embodiments, and therefore a duplicated description will be omitted.
The control unit 160e further has a function of performing feedback control to adjust (correct) the target operating parameters determined by the target operating parameter determination model 142 based on the control results of the control object according to the target shaft torque. That is, when the shaft torque does not reach the target shaft torque through torque control based on the target shaft torque, the control unit 160e performs control to bring the shaft torque closer to the target shaft torque by adjusting the operating parameters through feedback control of the torque control. In this way, the control unit 160e can shorten the time it takes for the shaft torque to reach the target shaft torque.
The control unit 160e performs feedback control using, for example, PID control or model predictive control.
The operating parameters controlled by the feedback control of the control unit 160e include, for example, the flocculant addition rate, injection pressure, back pressure closure rate, differential speed, centrifugal acceleration, sludge supply rate, heat medium temperature, heat medium flow rate, and polymer flocculant injection rate.

(7) Control Object Priority Determination Unit 170
The function of the control object priority determination unit 170 according to the sixth embodiment is similar to the function of the control object priority determination unit 170 according to the second embodiment, and therefore a duplicated description will be omitted.
In addition, the control object priority determination unit 170 according to the sixth embodiment determines the priority of the control object based on the target operating parameters determined by the target operating parameter determination model 142 after the target operating parameters have been corrected by the control unit 160e.

<6-3. Input/output on the control panel>
The functional configuration of the control panel 100e according to the sixth embodiment has been described above. Next, inputs and outputs of the control panel 100e according to the sixth embodiment will be described with reference to Fig. 19. Fig. 19 is a diagram showing an example of inputs and outputs of the control panel 100e according to the sixth embodiment. Note that Fig. 19 shows an example in which the heating dehydrator 50 is a metal filter media dehydrator, and the operating parameters are the flocculant addition rate, injection pressure, and back pressure shut-off rate.

As shown in Fig. 19, a target moisture content and sludge information are input to a target shaft torque determination model 141. The target moisture content is acquired by a target value acquisition unit 120. The sludge information is acquired by a sludge information acquisition unit 130e. The target shaft torque determination model 141 outputs a target shaft torque from the input target moisture content and sludge information. The target shaft torque is input to a control unit 160e and a target operating parameter determination model 142.
The control unit 160e controls the torque of the controlled object (torque control) in accordance with the input target axial torque.
The target shaft torque and sludge information are input to the target operating parameter determination model 142. The target shaft torque is determined by the target shaft torque determination model 141. The sludge information is acquired by the sludge information acquisition unit 130e. The target operating parameter determination model 142 outputs target operating parameters based on the input target shaft torque and sludge information.
The control unit 160e acquires the measured value of the shaft torque after control of the control object and performs feedback control. The control unit 160e acquires, through the feedback control, a correction value for correcting the target operating parameter determined by the target operating parameter determination model 142. The control unit 160e inputs the target operating parameter corrected with the acquired correction value to the control object priority determination unit 170.
The control object priority determination unit 170 inputs target operating parameters to the control unit 160e in accordance with the control object priorities.
The control unit 160e controls the controlled object in accordance with the input target shaft torque and target operating parameters. The control unit 160e acquires a measured value of the shaft torque after the controlled object is controlled, and performs feedback control.

<6-4. Control panel operation>
The inputs and outputs of the control panel 100e according to the sixth embodiment have been described above. Next, the operation of the control panel 100e according to the sixth embodiment will be described with reference to Fig. 20. Fig. 20 is a flowchart showing an example of the operation of the control panel 100e according to the sixth embodiment.

The processing from step S601 to step S603 shown in FIG. 20 is the same as the processing from step S101 to step S103 described with reference to FIG. 4, and therefore a duplicated description will be omitted.
The processing from step S604 to step S608 shown in FIG. 20 is the same as the processing from step S503 to step S507 described with reference to FIG. 17, and therefore a duplicated description will be omitted.

As described above, the control panel 100e (control device) according to the sixth embodiment includes the target value acquisition unit 120, the sludge information acquisition unit 130e, the target value determination unit 150e, and the control unit 160e.
The target value acquisition unit 120 acquires a first target value for controlling the heating dehydrator 50 (sludge dehydrator), which is determined according to the operating state of the incinerator 81 that incinerates the dehydrated sludge dehydrated by the heating dehydrator 50. The sludge information acquisition unit 130e acquires sludge information including at least the sludge temperature, which is the temperature of the dehydrated sludge. The target value determination unit 150e determines a second target value for controlling the control object that is correlated with the first target value, based on the relationship between the acquired first target value and the acquired sludge information. The control unit 160e controls the control object according to the determined second target value.

With this configuration, the control panel 100e according to the sixth embodiment controls the operation of the heating and dehydrating machine 50 in response to changes in the sludge temperature in the heating and dehydrating machine 50, thereby maintaining a constant moisture content in the dehydrated sludge discharged from the heating and dehydrating machine 50.

Therefore, the control panel 100e according to the sixth embodiment enables the dehydrator to operate at a stable moisture content even when the sludge temperature changes.

In addition, the control unit 160d of the control panel 100e according to the sixth embodiment corrects the target operating parameters determined by the target operating parameter determination model 142 based on the target shaft torque determined by the target shaft torque determination model 141, based on the results of feedback control of the torque control. This enables the control panel 100e to shorten the time it takes for the shaft torque to reach the target shaft torque through torque control, and to perform torque control with higher accuracy.

The above describes an embodiment of the present invention. Note that some or all of the control panels 100 and 100a-100e (control devices) in the above-described embodiment may be implemented by a computer. In this case, a program for implementing this function may be recorded on a computer-readable recording medium, and the program may be loaded into a computer system and executed. Note that the term "computer system" here includes hardware such as an OS and peripheral devices. Furthermore, "computer-readable recording medium" refers to portable media such as flexible disks, optical magnetic disks, ROMs, and CD-ROMs, as well as storage devices such as hard disks built into a computer system. Furthermore, "computer-readable recording medium" may also include media that dynamically store programs for a short period of time, such as communication lines used when transmitting programs via networks such as the Internet or telephone lines, or media that store programs for a fixed period of time, such as volatile memory within the computer systems that serve as the server or client in such cases. Furthermore, the above program may be designed to realize some of the functions described above, or may be capable of realizing the functions described above in combination with a program already stored in the computer system, or may be realized using a programmable logic device such as an FPGA (Field Programmable Gate Array).

The above describes in detail an embodiment of the present invention with reference to the drawings, but the specific configuration is not limited to that described above, and various design modifications can be made without departing from the spirit of the present invention.

1...heating dehydration system, 10...flocculation device, 20...concentration device, 30...thickened sludge supply pump, 40...flocculant supply pump, 45...flocculant flow meter, 48...pressure pressure sensor, 50...heating dehydrator, 50A...casing, 50A1...first space, 50A2...second space, 50A3...third space, 50A4...heating section, 50B...filtration screen, 50Ba...inner filtration screen, 50Bb...outer filtration screen, 50c...rotation drive section, 50C...base plate, 50d...ribbon screw, 50D...lid body, 50e...connecting plate, 50E...discharge chamber, 50f...supply pipe, 50F...discharge outlet, 50G...back pressure plate, 50Gs...back pressure sensor, 50H...drain pipe, 51...torque sensor, 52...thermo-thermometer, 55...dewatered sludge hopper, 6 0...heat medium supply pump, 65...heat medium flow meter, 70...dewatered sludge supply pump, 78...sludge flow meter, 81...incinerator, 82...boiler, 83...flue gas treatment tower, 100, 100a to 100e...control panel, 110...communication unit, 120...target value acquisition unit, 120a, 120b...target value acquisition unit, 130, 130a, 130b, 130e...sludge information acquisition unit, 140, 14 140a, 140b, 140d, 140e...Memory unit, 141...Target shaft torque determination model, 142...Target operating parameter determination model, 150, 150a, 150b, 150d, 150e...Target value determination unit, 151...Target shaft torque determination unit, 152...Target operating parameter determination unit, 160, 160a-160e...Control unit, 170...Control object priority determination unit

Claims (18)

a target value acquisition unit that acquires, as a first target value for controlling the sludge dehydrator, either a target moisture content indicating a target value for the moisture content of dehydrated sludge desired in an incinerator that incinerates the dehydrated sludge dehydrated by the sludge dehydrator, or a target shaft torque indicating a target value for the shaft torque of a rotary drive unit of the sludge dehydrator that is necessary to obtain dehydrated sludge with the desired moisture content in the incinerator;
a sludge information acquisition unit that acquires sludge information indicating factors that affect the correlation between the moisture content and the shaft torque during operation of the sludge dewatering machine, the sludge information including at least a sludge temperature that is the temperature of the dewatered sludge;
a target value determination unit including at least one of a target shaft torque determination unit that, when the acquired first target value is the target moisture content, determines the target shaft torque, which is correlated with the moisture content, as a second target value for control of a controlled object, based on the target moisture content and the sludge information, or a target operating parameter determination unit that, when the acquired first target value is the target shaft torque, determines a target operating parameter, which is a target value of an operating parameter other than the shaft torque, which is correlated with the shaft torque in operation of the sludge dewatering machine, as the second target value, based on the target shaft torque and the sludge information ;
a control unit that controls the controlled object in accordance with the determined second target value;
Equipped with
the control target is at least one of a controllable part of the sludge dewatering machine and a pump that controls supply to the sludge dewatering machine, which needs to be controlled in accordance with the first target value and the sludge information;
Control device. the target value determination unit includes only the target shaft torque determination unit,
the target value acquisition unit acquires the target moisture content,
the target shaft torque determination unit determines the target shaft torque based on a relationship between the acquired target moisture content and the acquired sludge information.
The control device according to claim 1 . the control unit performs feedback control to adjust operation parameters of the sludge dewatering machine based on a result of controlling the shaft torque of the rotation drive unit to the determined target shaft torque.
The control device according to claim 2 . The control unit adjusts, as the operation parameter, an addition rate of a flocculant injected into the sludge being dewatered by the sludge dewatering machine.
The control device according to claim 3 . The control unit performs the feedback control by model predictive control.
The control device according to claim 3 or 4 . the target value determination unit includes only the target operating parameter determination unit,
the target value acquisition unit acquires the target shaft torque,
the target operating parameter determination unit determines the target operating parameters based on a relationship between the acquired target shaft torque and the acquired sludge information.
The control device according to claim 1 . the control unit performs feedback control to adjust the determined target operating parameter based on a control result of the controlled object according to the acquired target shaft torque.
The control device according to claim 6 . the target value determination unit includes the target shaft torque determination unit and the target operating parameter determination unit,
the target value acquisition unit acquires the target moisture content,
the target shaft torque determination unit determines the target shaft torque based on a relationship between the acquired target moisture content and the acquired sludge information;
the target operating parameter determination unit determines the target operating parameters based on a relationship between the determined target shaft torque and the acquired sludge information.
The control device according to claim 1 . the target operating parameter determination unit determines, as the target operating parameter, a target value of an addition rate of a flocculant to be injected into the sludge being dewatered by the sludge dewatering machine;
The control device according to claim 8 . the control unit performs feedback control to adjust the determined target operating parameter based on a control result of the controlled object according to the determined target shaft torque.
The control device according to claim 8 or 9 . The control unit adjusts the addition rate of the flocculant injected into the sludge being dewatered by the sludge dewatering machine as the determined target operating parameter.
The control device according to claim 10 . The control unit performs the feedback control by model predictive control.
The control device according to claim 10 or 11 . the target shaft torque determination unit determines the target shaft torque using a trained model that has been machine-learned to define a relationship between the moisture content of the dewatered sludge, sludge information about the dewatered sludge, and the shaft torque of the rotation drive unit.
The control device according to any one of claims 1 to 5 and claims 8 to 12 . the target operating parameter determination unit determines the target operating parameters using a trained model that has been machine-learned to understand the relationship between the shaft torque of the rotation drive unit and the sludge information of the dewatered sludge and the operating parameters.
The control device according to any one of claims 1 and 6 to 13 . a control object priority determination unit that determines a priority for controlling a control object corresponding to each of the target operating parameters when there are a plurality of the determined target operating parameters;
The control device according to any one of claims 6 to 9 , further comprising: A heating and dehydration system comprising the control device according to any one of claims 1 to 15 . a target value acquisition step in which a target value acquisition unit acquires, as a first target value for controlling the sludge dehydrator, either a target moisture content indicating a target value for the moisture content of dehydrated sludge desired in an incinerator that incinerates the dehydrated sludge dehydrated by the sludge dehydrator, or a target shaft torque indicating a target value for the shaft torque of a rotary drive unit of the sludge dehydrator necessary to obtain dehydrated sludge with the desired moisture content in the incinerator;
a sludge information acquisition step in which a sludge information acquisition unit acquires sludge information indicating factors that affect the correlation between the water content and the shaft torque during operation of the sludge dewatering machine, the sludge information including at least a sludge temperature that is the temperature of the dewatered sludge;
a target value determination process including at least one of a target shaft torque determination process in which, when the acquired first target value is the target moisture content, a target shaft torque determination unit determines, based on the target moisture content and the sludge information, the target shaft torque which is correlated with the moisture content, as a second target value for control of a controlled object, or a target operating parameter determination process in which, when the acquired first target value is the target shaft torque, a target operating parameter determination unit determines, based on the target shaft torque and the sludge information, a target operating parameter which is a target value of an operating parameter other than the shaft torque which is correlated with the shaft torque in operation of the sludge dewatering machine, as the second target value;
a control step in which a control unit controls the controlled object in accordance with the determined second target value;
Including,
the control target is at least one of a controllable part of the sludge dewatering machine and a pump that controls supply to the sludge dewatering machine, which needs to be controlled in accordance with the first target value and the sludge information;
Control method. Computer,
a target value acquiring means for acquiring, as a first target value for controlling the sludge dehydrator, either a target moisture content indicating a target value for the moisture content of the dehydrated sludge desired in an incinerator that incinerates the dehydrated sludge dehydrated by the sludge dehydrator, or a target shaft torque indicating a target value for the shaft torque of a rotary drive unit of the sludge dehydrator that is necessary to obtain the dehydrated sludge with the desired moisture content in the incinerator;
a sludge information acquiring means for acquiring sludge information indicating factors that affect the correlation between the moisture content and the shaft torque during operation of the sludge dewatering machine, the sludge information including at least a sludge temperature, which is the temperature of the dewatered sludge;
a target value determination means that functions as at least one of a target shaft torque determination means that, when the acquired first target value is the target moisture content, determines the target shaft torque, which is correlated with the moisture content, as a second target value for control of a controlled object, based on the target moisture content and the sludge information, or a target operating parameter determination means that, when the acquired first target value is the target shaft torque, determines a target operating parameter, which is a target value of an operating parameter other than the shaft torque, which is correlated with the shaft torque in operation of the sludge dewatering machine, as the second target value, based on the target shaft torque and the sludge information;
a control means for controlling the controlled object in accordance with the determined second target value;
It functions as
the control target is at least one of a controllable part of the sludge dewatering machine and a pump that controls supply to the sludge dewatering machine, which needs to be controlled in accordance with the first target value and the sludge information;
program.