JP6938159B2 - AI-controlled centrifuge - Google Patents

Description

The present invention relates to a centrifuge that separates a treatment liquid derived from sewage containing sludge into a dehydrated cake and a separation liquid, and in particular, provides a control function of an artificial intelligence (AI) method to fully automate the centrifuge. Regarding technology to realize driving.

A centrifuge called a decanter is known as a device installed in a sewage treatment facility to solid-liquid separate a treatment liquid derived from sewage containing sludge into a dehydrated cake and a separation liquid. FIG. 4 schematically shows the basic structure of the decanter. The horizontal decanter 1 includes a bowl 11 and a screw conveyor 12 that rotate around a horizontal axis. Although not shown, a vertical decanter in which the bowl 11 and the screw conveyor 12 rotate around a vertical axis is also known.

The bowl 11 is formed of a cylindrical body having one end side or both ends formed in a conical shape. The screw conveyor 12 is a rotary conveyor provided with screw blades 12a for transporting the solid phase separated in the bowl 11. The screw conveyor 12 is hollow along the rotation center axis, and the processing liquid supply nozzle 13 to be centrifuged is inserted with a slight clearance so as not to come into contact with the screw conveyor 12. The processing liquid discharged from the tip of the supply nozzle 13 is supplied to the processing liquid chamber in the screw conveyor 12, is discharged from the supply hole 14 formed on the outer peripheral surface by the action of centrifugal force, and is supplied into the bowl 11. Will be done.

In such a configuration, the treatment liquid derived from sewage treated in a settling tank or the like in the sewage treatment facility is continuously supplied into the bowl 11, and when the bowl 11 is rotated at a predetermined rotation speed, it is centrifuged. The treatment liquid is separated into a solid phase and a liquid phase in the bowl 11 by the action of force. The solid phase is conveyed toward one end side of the bowl 11 by the screw conveyor 12, separates from the liquid phase at the conical portion, and is discharged as a dehydrated cake through the solid phase outlet 15. On the other hand, the liquid phase (separation liquid) overflows from the liquid phase outlet 16 on the opposite side and is discharged.

As a control method for obtaining a dehydrated cake having a desired water content with the decanter 1 described above, a method is known in which the torque value of the screw conveyor 12 is used as a control index and the differential speed is variably controlled so as to have a predetermined torque value. (See, for example, Patent Documents 1 and 2). That is, it is a control method focusing on the fact that the load of the screw conveyor 12 that conveys the solid phase in the bowl 11 toward the solid phase outlet 15 changes depending on the water content of the solid phase. Since there are few moisture content meters that can accurately measure the moisture content of the dehydrated cake discharged from the decanter 1, the above-mentioned torque control is an effective control method for obtaining a dehydrated cake having a desired moisture content. ..

However, for example, when operating the decanter 1, how much centrifugal force should be applied (that is, how much the rotation speed of the bowl should be set), how much the target torque value should be set, and so on. The control guideline usually inherits the operating conditions of the previous day, and may not always be set to appropriate operating conditions. This is because the properties of sewage flowing into sewage treatment facilities can vary greatly from day to day. In such a case, the dehydrated cake having a desired moisture content cannot be obtained under the operating conditions of the previous day, and the operator will improve the operating conditions later. However, even at this time, it often depends on the operator's feeling as to how much the change should be made.

Japanese Patent No. 5442099 Japanese Patent No. 5118262 Japanese Patent No. 3690169

The present invention has been made based on such circumstances, and an object of the present invention is to collect various information inside and outside the sewage treatment facility and utilize the collected information to obtain an appropriate operation pattern of the centrifuge. An object of the present invention is to provide an AI (artificial intelligence) control type centrifuge that enables fully automated operation by setting (or resetting).

A further object of the present invention is to collect various information even after the operation of the centrifuge is started, correct the operation pattern based on the collected information, and use it thereafter, thereby performing a more complete fully automated operation. It is an object of the present invention to provide an AI (artificial intelligence) control type centrifuge that makes it possible to realize the above.

The gist of the present invention is as follows.
(1) The AI-controlled centrifuge of the present invention is a centrifuge that separates a treatment liquid derived from sewage containing sludge into a dehydrated cake and a separation liquid, and is a sewage recovery target to be treated by the centrifuge. An information collecting means for selectively collecting predetermined information from the environmental information of the area and / or the past operation information of the sewage treatment facility in which the centrifuge is installed, and a control method for the centrifuge are previously provided. An operation pattern storage means having a plurality of operation patterns, an operation pattern selection / determination means for selecting at least one from the plurality of operation patterns based on the information collected by the information collecting means, and the operation pattern selection. A feature is that the centrifuge is provided with an operation control means for controlling the operation of the centrifuge according to an operation pattern selected by the determination means, and a fully automated operation control unit including the operation control unit.
(2) Further, during the operation of the centrifuge according to the operation pattern, information on the properties of the dehydrated cake and / or the separation liquid, the load status of the equipment attached to the centrifuge, and the centrifugation in the sewage treatment facility. The operation information collecting means for collecting predetermined information from the operation status of the processing equipment arranged in the process downstream of the apparatus and the appropriateness of selecting the operation pattern are determined based on the information collected by the operation information collecting means. At the same time, the operation pattern reselection means for reselecting another operation pattern when the determination result is negative can be further provided in the fully automated control unit.
(3) In this case, the reselected operation pattern is newly stored in the operation pattern storage means in association with the predetermined information selected and collected by the information collecting means, and the operation pattern selection / determination means is used. When the combination of the predetermined information is obtained, the reselected operation pattern can be selected as the first candidate.
(4) In addition, during the operation of the centrifuge according to the operation pattern, information on the properties of the dehydrated cake and / or the separation liquid, the load status of the equipment attached to the centrifuge, and the centrifugation in the sewage treatment facility. The operation information collecting means for collecting predetermined information from the operation status of the processing equipment arranged in the process downstream of the apparatus and the operation pattern control method are corrected based on the information collected by the operation information collecting means. The operation pattern correction means to be performed can be further provided by the fully automated control unit.
(5) In this case, the corrected operation pattern is newly stored in the operation pattern storage means in association with the predetermined information selectively collected by the information collection means, and the operation pattern selection / determination means is the operation pattern selection / determination means. When a combination of predetermined information is obtained, the corrected operation pattern can be selected as the first candidate.

According to the present invention, in a centrifuge that separates a treatment liquid derived from sewage containing sludge into a dehydrated cake and a separation liquid, environmental information of the sewage recovery target area to be treated by the centrifuge and / or An operation pattern having a plurality of operation patterns in advance of an information collecting means for selectively collecting predetermined information from the past operation information of the sewage treatment facility in which the centrifuge is installed and a control method for the centrifuge. According to the storage means, the operation pattern selection / determination means for selecting at least one from the plurality of operation patterns based on the information collected by the information collection means, and the operation pattern selected by the operation pattern selection / determination means. By providing an operation control means for controlling the operation of the centrifuge and a fully automated operation control unit including the centrifuge, the centrifuge can be properly operated by utilizing the information collected inside and outside the sewage treatment facility. The pattern can be set (or reset) to make fully automated operation feasible.

Furthermore, during the operation of the centrifuge according to the above operation pattern, information on the properties of the dehydrated cake and / or the separation liquid, the load status of the ancillary equipment of the centrifuge, and the centrifuge in the sewage treatment facility An operation information collecting means that collects predetermined information from the operation status of the processing equipment arranged in the downstream process, and an operation pattern that corrects the control method of the operation pattern based on the information collected by the operation information collecting means. By further providing the correction means and the fully automated control unit, it is possible to realize a more complete fully automated operation.

It is a figure which shows the schematic structure of the sewage treatment facility which arranged the centrifuge according to the preferable embodiment of this invention, and the information network which collects information from inside and outside of a facility. It is a vertical cross-sectional block diagram of the said centrifuge device. It is a figure for demonstrating an example of the operation pattern of the said centrifuge device. It is a figure which shows the structure of the conventional centrifuge device.

Hereinafter, an AI-controlled centrifuge according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. However, the technical scope of the present invention is not limited to any limitation by the embodiments described below.

(Explanation of the overall configuration)
FIG. 1 shows an overall schematic configuration of a sewage treatment facility 3 in which a decanter 2 is arranged as a preferable example of a centrifuge device, and an information network for collecting various information inside and outside the facility and operating the decanter 2 in a fully automated manner. An example is shown.

The sewage treatment facility 3 is roughly divided into a water treatment facility and a sludge treatment facility. The water treatment facility is composed of equipment such as a first settling tank 31, an aeration tank, and a final settling tank. The aeration tank, final settling tank, etc. are shown as "downstream process" for convenience of drawing. Then, for example, the sewage collected from the sewage collection target area partitioned so as to include a plurality of municipalities is first supplied to the settling tank 31 and solid-liquid separated into the supernatant and the first settled sludge. The supernatant is transferred to an aeration tank, and the initial sludge is sent to a sludge treatment facility. The supernatant from the first settling tank 31 supplied to the aeration tank is biologically treated with activated sludge in the aeration tank. A part of the generated activated sludge is supplied to the final settling tank and solid-liquid separated into the supernatant and the settled sludge. The supernatant is further detoxified and then discharged, part of the sedimented sludge is returned to the aeration tank, and the rest is sent to the sludge treatment facility as excess sludge.

The sludge treatment facility is a facility for treating sludge generated in the above-mentioned water treatment facility, and is composed of a concentration facility, a digestion facility, a dehydration facility, and the like. FIG. 1 shows an example of the separation and concentration type equipment. In this case, the first settling sludge from the first settling tank 31 is gravity-concentrated in the gravity type concentrating tank 32, and the excess sludge from the final settling tank is mechanically concentrated in the mechanical concentrator 33. The mechanical concentrator 33 is a belt type filtration concentrator or the like, and a decanter type centrifugal concentrator may be used. The sludge concentrated by the gravity type concentrating tank 32 and the mechanical concentrator 33 (concentrated sludge) is supplied from the concentrated sludge tank 34 to the decanter 2 as a dehydrator via a pump 35, or is digested and then transferred to the decanter 2. Supply. The decanter 2 solid-liquid separates the sludge (concentrated sludge), which is the treatment liquid, into the dehydrated cake and the separation liquid. Then, the dehydrated cake from the decanter 2 is supplied to the incinerator 37 via a transfer facility 36 such as a pressure pump or a conveyor, and is incinerated. Processing other than incinerator may be performed. The overall configuration of the sewage treatment facility 3 is an example, and other equipment configurations and treatment methods may be different except for the decanter 2 of the AI control method of the present embodiment.

Next, an information network in which the decanter 2 collects information in order to realize fully automated operation will be described with reference to FIG. First, looking at the information collected in the sewage treatment facility 3, one of the servers provided in the operation room 38 that centrally controls each facility (31 to 37) in the treatment facility 3 is the past of the treatment facility 3. The operation status of the above is readable and stored in a storage unit (for example, HDD). Information on the past operation status includes, for example, the operating status of each equipment (31 to 37) such as the decanter 2 and the incinerator 37, and incidental equipment such as a chemical injection facility for injecting a chemical solution such as a coagulant into sludge and a pump. Equipment load information, properties of sludge and liquid treated in each equipment (31-37), types of chemicals such as polymer and inorganic coagulants and chemical injection method, maintenance of each equipment (31-37) Contains information such as failure history. For this information, for example, a daily report format operation record in which various data are recorded at predetermined predetermined time may be used. An example of information used to realize fully automated operation is listed below. The information is used to preselect and determine an appropriate operation pattern when operating the decanter 2.

(A) Example of past operation information of sewage treatment facility ・ Record of operation status of decanter 2 For example, centrifugal force, differential speed, torque, power consumption, inverter frequency, chemical / chemical injection method, etc. Load record For example, discharge pressure of pump, motor current value, motor current value of conveyor, etc. ・ Record of operation status of inverter 37, for example, furnace temperature, fuel consumption, etc. Maintenance history For example, the cause of operation troubles and failures of each equipment, maintenance plan or past maintenance record, etc.

Further, one of the servers provided in the operation room 38 is configured to be able to collect information outside the sewage treatment facility 3 through the Internet line 4, for example, as a preferable example of the information network. Of course, an information network other than the Internet may be included. Furthermore, an information network may be adopted instead of the Internet. Examples of information outside the sewage treatment facility are listed below. Such information is various environmental information of the sewage collection target area to be processed by the facility, and is used for preselecting and determining an appropriate operation pattern when operating the decanter 2.

(B) An example of sewage-related information in the sewage collection target area ・ Information on the sewage collection area For example, the ratio of residential / commercial facilities / factories in the area, collection methods such as diversion type and confluence type, etc. ・ Each of the sewage collection target areas Sewage inflow information flowing into the pump station 41 For example, pump flow rate and sewage storage amount in each pump station, sewage flow rate of major masses in the area, etc. , Replacement work of sewage pipes and masses in the area, etc. ・ Information on events held in the area subject to sewage collection For example, information on large events where people gather from outside the area such as sports and concerts.

(C) An example of weather information in the area subject to sewage collection ・ Weather, temperature, humidity, rainfall, etc. (forecast for the next day or several days ahead, etc.)
For example, forecast information that subdivides the area by city, ward, town, etc. ・ Weather, temperature, humidity, rainfall, etc. (Situation on the day)
For example, current information that subdivides the area by city, ward, town, etc.

(D) An example of other information on the area subject to sewage recovery ・ Amount of river water flowing in the area, discharge of sediment from dams, etc. ・ Power generation status of electric power companies, etc.

The above-mentioned information is collected by, for example, executing a program provided in the operation room 38 by searching (for example, using a search engine) through the Internet or the like at a predetermined time. It is desirable to do. As an example, link to a specific information site such as the homepage of the Japan Meteorological Agency, the homepage of the Waterworks Bureau, the homepage of the local government, the homepage of facilities such as arenas and concert halls, and the homepage of the electric power company. If there is no specific information site, for example, a dedicated line may be installed for a specific facility such as a pumping station 41 to obtain information. As the information, for example, the information obtained the day before the operation pattern of the decanter 2 is preselected / determined or the number of days before the predetermined number of days is used. Information may be obtained once a day, or may be obtained twice or more at a fixed time such as daytime and nighttime.

Furthermore, at least one of the servers provided in the operation room 38 has the current operating status of the sewage treatment facility 3 when the decanter 2 is being operated, for example, each facility such as the decanter 2 and the incinerator 37 (31). ~ 37) Operation status, load information of chemical injection equipment for injecting chemical liquid such as coagulant into sludge and incidental equipment such as pressure pump, properties of sludge and liquid treated by each equipment (31-37), Current actual information such as selected types of chemicals such as polymer-based and inorganic-based flocculants, chemical injection methods, maintenance of each equipment (31 to 37), and failure status is being collected. These actual information are collected by being transmitted from a control unit (for example, a control panel) 42 of each facility, or by being transmitted by an operator who patrols the site using a communication device 43. For such actual information, it is determined whether or not the operation pattern of the decanter 2 preselected / determined is appropriate by using the information collected from outside the facility, and if it is not appropriate, the operation pattern is reset. Used for Further, when it is determined that the operation pattern is not appropriate, it is used to correct the operation pattern itself. Examples of information used to reset or correct the operating pattern are listed below.

(E) An example of current operation information of a sewage treatment facility ・ Current operating status of decanter 2, for example, centrifugal force, differential speed, torque, power consumption, inverter frequency, chemical / chemical injection method, etc. Load For example, discharge pressure of pressure pump, motor current value, motor current value of conveyor, etc. ・ Operating status of inverter 37, for example, furnace temperature, fuel consumption, etc. ・ Operating troubles and failures of each equipment, for example. Occurrence of operational troubles and failures of each equipment and their causes, etc. (F) Example of current weather information in the area subject to sewage recovery ・ Current status such as weather, temperature, humidity, rainfall, etc. Actual information subdivided by ward unit, town unit, etc.

(Explanation of the configuration of Decanter 2)
Subsequently, an example of the configuration of the decanter 2 will be described with reference to FIG. As shown in FIG. 2, the decanter 2 is centrifuged in a casing 2 in which a solid phase outlet 20 and a liquid phase outlet 21 are formed on the lower surface side, a bowl 5 arranged in the casing, and a bowl 5. It is provided with a screw conveyor 6 for transporting the solid phase and a supply nozzle 7 for supplying the treatment liquid derived from sewage sent from the concentrated sludge tank 34 into the bowl 5. Both shafts of the bowl 5 are supported by a bearing mechanism 22 such as a bearing arranged outside the casing 2, for example. Further, both shafts of the screw conveyor 6 are supported by a bearing mechanism 23 such as a conveyor bearing. Reference numeral 24 is a partition wall for partitioning the space in the casing 2.

Then, when the power of the main motor 25, which is a drive mechanism, is transmitted to the pulley 25b on the bowl 5 side via the rotating belt 25a, the bowl 5 rotates, and the gearbox 26 and the spline shaft 26a, which are differential speed generators, are further rotated. Rotational power is transmitted to the screw conveyor 6 through, whereby the bowl 5 and the screw conveyor 6 rotate with a relative differential speed. As an example of normal operation, the bowl 5 is rotated at a predetermined rotation speed selected in the range of 500 to 8000 rpm, and the screw conveyor 6 is rotated with a differential speed of 0.5 to 50 rpm with respect to the bowl 5 to centrifuge. I do.

A motor called a back drive motor 27 is connected to the gearbox 26 via a rotary belt 27a and a pulley 27b. The back drive motor 27 is for braking the screw conveyor 6 so that it rotates slower than the bowl 5. The regenerative power generated in the back drive motor 27 by applying the brake can be supplied to the main motor 25. However, the back drive motor 27 does not necessarily have to be provided. Reference numeral 28 is a support frame for the decanter 2, and reference numeral 29 is a support member for supporting the supply nozzle 5.

The bowl 5 has a conical portion 51 formed on one end side of a cylindrical body portion, and a disk-shaped member called a front hub 52 is provided on the other end side. The body portion of the bowl 5 forms a pool (liquid pool) portion of the treatment liquid supplied into the bowl 5. On the other hand, the conical portion 51 forms a beach portion where the solid phase conveyed by the screw conveyor 6 separates from the liquid phase, and a solid phase discharge port 53 for discharging the dehydrated cake, which is dehydrated sludge, is formed at the end thereof. It is provided. Further, the front hub 52 is provided with a liquid phase discharge port 54 in which the liquid phase, which is a separation liquid, overflows and is discharged. The liquid phase discharge port 54 is a circular opening hole penetrating the front hub 52.

On the outer peripheral surface of the screw conveyor 6, screw blades 61 for conveying the solid phase in the bowl 5 are spirally provided. Further, a supply hole 62 is provided on the outer peripheral surface of the screw conveyor 6. The supply hole 62 communicates with the liquid supply chamber 63 formed inside the tip side of the screw conveyor 6.

The supply nozzle 7 is approached or inserted into the liquid supply chamber 63 so as not to come into contact with the rotating bowl 5 and the screw conveyor 6. A pipe from a liquid feeding means (not shown in FIG. 2) such as a pump 35 is connected to the base end side of the supply nozzle 7. The processing liquid sent by the liquid feeding means is discharged from the tip of the supply nozzle 7 into the liquid supply chamber 63, and the processing liquid supplied into the liquid supply chamber 63 is the centrifugal force of the rotating screw conveyor 6. By the action, it is discharged from the supply hole 62 and supplied into the bowl 5, and by the action described above, it is separated into the dehydrated cake and the separation liquid and discharged.

The decanter 2 includes a control unit 8 that preselects and determines an operation pattern, controls each component of the decanter 2 such as the main motor 25, and controls the operation of ancillary equipment such as a chemical injection facility and a pump. ing. The control unit 8 is composed of a computer system provided in the control panel 42 of the decanter 2 and / or a computer system provided in the operation room 38. A computer system includes, for example, a CPU, a memory, and a storage unit (for example, an HDD), and realizes a desired processing function by reading a program stored in the storage unit and executing the program by the CPU. That is, the information collecting means, the operation pattern storage means, the operation pattern selection / determination means, the operation control means, the operation information collection means, the operation pattern reselection means, and the operation pattern correction means for executing the AI control method by these computer systems. Is configured.

As for the operation pattern, for example, as schematically shown in FIG. 3, the correlation between the torque (Nm) of the screw conveyor and the water content (%) of the dehydrated cake with various centrifugal forces (G) as parameters is set to ". As an example, there are three patterns, "standard operation model", "operation model after rainfall", and "treatment amount increase model when the amount of sewage is large". Information on these plurality of operation patterns is readable by the control unit 8 and stored in a storage unit (for example, HDD). It should be noted that these three operation patterns are basic forms prepared in advance, and as described below as a preferable example, the number of operation patterns increases and / or the patterns become complicated by the artificial intelligence function each time the operation is repeated. By making more operation patterns applicable, a more complete fully automated operation will be realized. Therefore, the default number of basic pattern patterns does not have to be three, and any number of one or more can be provided.

As an example of other operation patterns, it is possible to adopt an operation condition in which the model / specification of the decanter 2 and the property of the treatment liquid are associated with each other, and an operation condition in which the differential speed-the property of the treatment liquid-the injection amount of the chemical solution is associated with each other. It can be patterned into, for example, a "standard operation model", a "operation model after rainfall", and a "processing amount increase model when the amount of sewage is large". Of course, it is not limited to the classification of "standard", "after rainfall", and "when the amount of sewage is large".

Subsequently, an example of the fully automated operation of the decanter 2 will be described.
For example, on the morning of the operation day, the server in the operation room 38 reads the operation status data of the sewage treatment facility 3 on the previous day from the storage unit, and the operation conditions of the decanter 2 on the previous day are "standard operation model" and "operation after rainfall". It is determined whether the model is used as a model or a model for increasing the amount of treated water when the amount of sewage inflow is large. At that time, the decanter 2 may be stopped before starting or may be in operation. Here, as an example, it is assumed that it rained the day before yesterday and the day before yesterday was driven according to the "driving model after rain".

On the other hand, for example, if the weather forecast for the day of driving announced on the previous day via the Internet line 4 is a forecast that the season is summer (July to August), the weather is fine, the temperature is 30 ° C, and the humidity is 70%, the control unit 8 , The candidate is to drive with the "standard operation model" from the operation patterns. However, for example, if a large event is scheduled to be held in the environmental information obtained through the Internet line 4, the amount of sewage inflow will increase as a large number of people gather from outside the area. Another candidate is the "model for increasing the amount of processing when processing". Furthermore, for example, if a part of a plurality of pumping stations 41 is scheduled to be temporarily suspended due to maintenance work, the amount of sewage sent to the sewage treatment facility 3 will be reduced accordingly, and the "standard operation model" will be used. Decide to select. However, the centrifugal force (G) will be set higher in consideration of the increase in sewage caused by the event. Furthermore, when the season is summer, the centrifugal force is set higher because the cohesiveness deteriorates due to the corrosion deterioration of sludge.

In other words, when the weather is sunny, the basic form is to select the "standard operation model", but since the conditions of "season is summer"-"event available"-"construction available" are combined. Finally, the torque value (control value) of the screw conveyor 6 is 32 Nm in order to set the initial setting of the centrifugal force to 1800 G, which is the highest in the "standard operation model", and to obtain a dehydrated cake with a desired moisture content of 71%. Decide to drive so that In this example, the driving pattern is selected / determined based on the four environmental information of season, weather, event, and construction, but of course, the driving pattern may be selected / determined based on other information to be collected. Furthermore, with respect to each environmental information, the timing may be taken into consideration, such as the one in which the impact appears the next day or the one in which the impact appears the day after next.

When the operation of the decanter 2 is started and a predetermined time (for example, several hours) elapses in this way, the control unit 8 collects information from inside and outside the facility and determines the suitability of the selected operation pattern. For example, as for the properties of the dehydrated cake, a large amount of sand is contained, and therefore, when the torque value is set to 32 Nm, the water content is too low, and the load of the pressure pump as the transfer equipment 36 for transporting the dehydrated cake is increased. Suppose. For the load of the pressure feed pump, for example, a threshold value of the discharge pressure is set in advance, and when the threshold value is exceeded, it is determined that the load is in an increased state. Judgment using the threshold value can be performed for other information as well. In this case, even if the weather forecast is sunny, the control unit 8 changes (reselects) to the "driving model after rainfall" according to the amount of rainfall when it rains the day before yesterday, and continues the operation. To. Specifically, even if the forecast for the day is sunny, it is assumed that it is raining more than the preset threshold value (for example, 200 mm) the day before yesterday, and the model is changed to the "driving model after rainfall". For example, the same applies when a guerrilla thunderstorm occurs in a part of the area.

Furthermore, the control unit 8 changes the selection method of the future operation pattern, and in the case of the combination of "season is summer"-"weather is sunny"-"event is available"-"construction is available", "standard operation model" is used. The first candidate is "season is summer"-"weather is sunny"-"but there is rainfall above the threshold the day before yesterday"-"event is available"-"construction is available" in the case of a combination of "after rainfall" Make sure to select "Driving model". In this way, the AI control function can be improved by subdividing the combination of information that is an option of the operation pattern each time the operation is repeated. As an example, the control unit 8 executes a control function by creating (updating) a database in which a combination of information and an operation pattern to be selected are arranged in a matrix. The selection of the operation pattern includes the selection of various settings (centrifugal force, chemicals, etc.) within the pattern as described above.

Furthermore, the rain the day before yesterday was a short period of rain, such as the evening rain, and when operated with the "operation model after rainfall", the water content gradually increased, and the fuel consumption of the incinerator 37 increased. Suppose. In this case, the control unit 8 determines that the currently aligned operation patterns cannot be used, and generates a new operation pattern. The determination can be made, for example, by setting a threshold value. Specifically, for example, a new "operation model after short-term rainfall" is generated and stored in which the slope of the correlation curve between torque and water content is set to an intermediate position between the "standard operation model" and the "operation model after rainfall". Save to the department. In the future, for the combination of "season is summer"-"weather is fine"-"but there is" short-term "rainfall above the threshold value the day before yesterday"-"event is available"-"construction is available", "after short-term rainfall" Make sure to select "Driving model". In this way, the AI control function can be further improved by increasing the number of selectable operation patterns each time the operation is repeated so that fine control can be performed.

In addition to the information used in the above control example, for example, information on the ratio of residential / commercial facilities / factories in the area reflects, for example, weekday and weekend sewage flow rates and changes in properties in the control. It can be used as information, and the information on the collection method such as the split flow type and the merge type can be used to parameterize the degree of influence of rainfall (large, medium, small). In addition, the weather information subdivided into areas such as city units, ward units, and town units can be used for control by generating a distribution map that affects sewage while repeatedly using it for the above control. good. For example, when the collection area is composed of cities A to D, a large amount of rainfall in cities A and C has a large effect.

Regarding the power generation status of electric power companies, for example, when the amount of electricity used in the power transmission area increases due to intense heat, for example, select a model with an increased processing flow rate at night and operate with a model with a reduced processing flow rate during the day to decanter. It can be used to perform operation with reduced power consumption of 2. That is, it realizes fully automated operation that contributes to power saving.

Furthermore, the history of operation troubles and failures of each equipment is stored in a storage unit as information (database) associated with the environmental conditions and operation conditions at that time, and is used to avoid operation troubles and failures. be able to. That is, for example, when the environmental conditions are the combination of "season is summer"-"weather is fine"-"event available"-"construction available", under certain operating conditions (centrifugal force, torque, chemical injection method, etc.) If there is a history of driving troubles, the control unit 8 does not select the operating conditions. As a result, it is possible to realize fully automated operation that avoids equipment operation troubles and failures.

According to the above-described embodiment, predetermined information is selected and collected from the environmental information of the sewage collection target area and / or the past operation information of the sewage treatment facility 3, and the operation pattern is selected based on the collected information. -By controlling the decanter 2 according to the determined and selected operation pattern, the appropriate operation pattern of the decanter 2 can be set (or reset) by utilizing the information collected inside and outside the sewage treatment facility 3. Automated operation can be made feasible. As described in detail so far, the fully automated operation referred to here is artificial intelligence (AI) in which the decanter 2 itself sets (including resetting and correcting) an appropriate operation pattern based on the selected and collected information. Means to perform method control. For example, even an operation by an operator or the like such as starting work and flow regulating SeiMisao operation of the apparatus was involved, control by the decanter 2 is included in the fully automatic operation if we row.

Further, during the operation of the decanter 2 according to the operation pattern, the information on the properties of the dehydrated cake and / or the separation liquid, the load status of the auxiliary equipment of the decanter 2, and the operating status of the processing equipment such as the incinerator 37 By collecting predetermined information from the above and correcting the operation pattern based on the collected information, it is possible to realize a more complete fully automated operation.

Although the present invention has been described in detail above in accordance with specific embodiments, the present invention in which various substitutions, modifications, changes, etc. regarding the form and details are defined by the description of the claims. It is clear to those with ordinary knowledge in the art that it can be done without departing from the spirit and scope.

2 Decanter 3 Sewage treatment facility 38 Operation room 4 Internet line 5 Bowl 6 Screw conveyor 8 Control unit

Claims (5)

In a centrifuge that separates a treatment liquid derived from sewage containing sludge into a dehydrated cake and a separation liquid.
Has been in advance a plurality of driving patterns and information collecting means for selecting collecting a plurality of types of information, the control method of the centrifuge from the environmental information of the sewage collection target area so that the said centrifugal separator is treated An operation pattern storage means, an operation pattern selection / determination means for selecting at least one from the plurality of operation patterns based on the plurality of types of information collected by the information collecting means, and the operation pattern selection / determination means. An AI control type centrifuge device comprising a fully automated operation control unit including an operation control means for controlling the operation of the centrifuge device according to an operation pattern selected by. While operating the centrifuge according to the above operation pattern, information on the properties of the dehydrated cake and / or the separation liquid, the load status of the equipment attached to the centrifuge, and downstream of the centrifuge in the sewage treatment facility. Based on the operation information collecting means that collects predetermined information from the operation status of the processing equipment arranged in the process and the information collected by the operation information collecting means, the suitability of selecting the operation pattern is determined, and the determination result is obtained. The AI control type centrifuge according to claim 1, further comprising an operation pattern reselection means for reselecting another operation pattern in the case of a failure, and the fully automated control unit. The reselected operation pattern is newly stored in the operation pattern storage means in association with the plurality of types of information selectively collected by the information collecting means.
The operation pattern selection / determination means is characterized in that when the information selected and collected by the information collection means is a combination of the plurality of types of information, the reselected operation pattern is selected as the first candidate. The AI control type centrifuge according to claim 2. While operating the centrifuge according to the above operation pattern, information on the properties of the dehydrated cake and / or the separation liquid, the load status of the equipment attached to the centrifuge, and downstream of the centrifuge in the sewage treatment facility. An operation information collecting means that collects predetermined information from the operation status of the processing equipment arranged in the process, and an operation pattern correction means that corrects the operation pattern control method based on the information collected by the operation information collecting means. The AI control type centrifuge according to claim 1, further comprising the fully automated control unit. The corrected operation pattern is newly stored in the operation pattern storage means in association with the plurality of types of information selectively collected by the information collection means.
The claim for the operation pattern selection / determination means selects the corrected operation pattern as a first candidate when the information selected and collected by the information collection means is a combination of the plurality of types of information. Item 4. The AI control type centrifuge according to item 4.

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