JP7236190B2 - AI-controlled centrifuge - Google Patents

Description

The present invention relates to a centrifugal separator that separates a treated liquid derived from sewage containing sludge into a dehydrated cake and a separated liquid, and in particular, provides a control function of the artificial intelligence (AI) method to fully automate the centrifugal separator. It relates to technology for realizing driving.

BACKGROUND ART A centrifugal separator called a decanter is known as a device installed in a sewage treatment facility for solid-liquid separation of a treated liquid derived from sewage containing sludge into a dehydrated cake and a separated liquid. FIG. 4 shows schematically the basic structure of the decanter. A horizontal decanter 1 has a bowl 11 rotating around a horizontal axis and a screw conveyor 12 . Although not shown, a vertical decanter in which the bowl 11 and the screw conveyor 12 rotate about a vertical axis is also known.

The bowl 11 is a cylindrical body having one end or both ends conical. The screw conveyor 12 is rotary conveying means with screw blades 12a for conveying the separated solid phase within the bowl 11 . The screw conveyor 12 is hollow along the central axis of rotation, and a supply nozzle 13 for the treatment liquid 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 in the outer peripheral surface by the action of centrifugal force, and is supplied into the bowl 11. be done.

In such a configuration, a treated liquid derived from sewage treated in a sedimentation 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 number of revolutions, the centrifugal The action of force separates the processing liquid into a solid phase and a liquid phase within the bowl 11 . The solid phase is conveyed toward one end of the bowl 11 by the screw conveyor 12, separated from the liquid phase at the conical portion, and discharged as a dehydrated cake through the solid phase outlet 15. On the other hand, the liquid phase (separated 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 moisture content in the decanter 1, 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 achieve a predetermined torque value. (See Patent Documents 1 and 2, for example). That is, this control method focuses on the fact that the load on the screw conveyor 12 that conveys the solid phase in the bowl 11 toward the solid phase outlet 15 varies 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 torque control described above is an effective control method for obtaining the desired moisture content of the dehydrated cake. .

However, when operating the decanter 1, for example, how much centrifugal force should be applied (that is, how much should be set for the rotational speed of the bowl), how much should be set for the target torque value, etc. The typical control guideline usually takes over the operating conditions of the previous day, and it may not always be said that appropriate operating conditions are set. This is because the properties of the sewage flowing into the sewage treatment facility may vary greatly from day to day. In such a case, the dehydrated cake having the desired moisture content cannot be obtained under the operating conditions of the previous day, and the operator subsequently improves the operating conditions. However, even at this time, the operator often relies on his intuition to determine how much the change should be made.

Japanese Patent No. 5442099 Japanese Patent No. 5118262 Japanese Patent No. 3690169 JP-A-11-226591 JP-A-04-171066 JP 2005-242524 A

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

A further object of the present invention is to collect various information even after starting the operation of the centrifugal separator, correct the operation pattern based on the collected information, and use it thereafter to achieve fully automated operation with a higher degree of perfection. To provide an AI (artificial intelligence) control type centrifuge capable of realizing

The gist of the present invention is as follows.
(1) The AI-controlled centrifugal separator of the present invention is a centrifugal separator that separates a treated liquid derived from sewage containing sludge into a dehydrated cake and a separated liquid, and the sewage collection target that is to be processed by the centrifugal separator. Information collecting means for selectively collecting predetermined information from environmental information of the area and/or past operation information of the sewage treatment facility where the centrifugal separator is installed, and a control method of the centrifugal separator are provided in advance. driving pattern storage means having a plurality of driving patterns; driving pattern selection/determining means for selecting at least one of the plurality of driving patterns based on the information collected by the information collecting means; and the driving pattern selection. and a fully automated operation control unit including operation control means for controlling the operation of the centrifugal separator according to the operation pattern selected by the determination means.
(2) Furthermore, while the centrifugal separator is being operated according to the operation pattern, information on the properties of the dehydrated cake and / or separated liquid, the load status of the incidental equipment of the centrifugal separator, centrifugal separation in the sewage treatment facility Operation information collection means for collecting predetermined information from the operation status of treatment equipment arranged in a process downstream of the apparatus, and determination of appropriateness of selection of an operation pattern based on the information collected by the operation information collection means. In addition, the fully automated control section may further include an operation pattern reselecting means for reselecting another operation pattern when the determination result is negative.
(3) In this case, the reselected driving pattern is newly stored in the driving pattern storage means in association with the predetermined information selected and collected by the information collecting means, and the driving pattern selecting/determining means If the combination of the predetermined information is obtained, the reselected driving pattern may be selected as the first candidate.
(4) In addition, during the operation of the centrifugal separator according to the operation pattern, information on the properties of the dehydrated cake and / or separated liquid, the load status of the incidental equipment of the centrifugal separator, centrifugal separation in the sewage treatment facility Operation information collection means for collecting predetermined information from the operation status of treatment equipment arranged in a process downstream of the equipment, and correcting the control method of the operation pattern based on the information collected by the operation information collection means. and an operation pattern correcting means for correcting the operation pattern.
(5) In this case, the corrected driving pattern is newly stored in the driving pattern storage means in association with the predetermined information selected and collected by the information collecting means, and the driving pattern selecting/determining means When a combination of predetermined information is obtained, the corrected driving pattern may be selected as the first candidate.

According to the present invention, in a centrifugal separator that separates a sewage-derived treated liquid containing sludge into a dehydrated cake and a separated liquid, the environmental information of the sewage collection target area to be treated by the centrifugal separator, and / or Information collecting means for selectively collecting predetermined information from past operation information of the sewage treatment facility where the centrifugal separator is installed, and an operation pattern having a plurality of operation patterns in advance for the control method of the centrifugal separator. storage means; driving pattern selecting/determining means for selecting at least one of the plurality of driving patterns based on the information collected by the information collecting means; and a fully automated operation control unit including an operation control means for controlling the operation of the centrifugal separator, so that the centrifugal separator can be properly operated by utilizing information collected inside and outside the sewage treatment facility. Patterns can be set (or reset) to enable fully automated operation.

Furthermore, while the centrifugal separator is being operated according to the operation pattern, information on the properties of the dehydrated cake and / or separated liquid, the load status of the auxiliary equipment of the centrifugal separator, and the centrifugal separator in the sewage treatment facility An operation information collection means for collecting predetermined information from the operation status of treatment equipment arranged in a downstream process, and an operation pattern for correcting the control method of the operation pattern based on the information collected by the operation information collection means. By further including the correction means in the fully automated control section, fully automated operation with a higher degree of perfection can be realized.

1 is a diagram showing a schematic configuration of a sewage treatment facility in which a centrifugal separator according to a preferred embodiment of the present invention is arranged and an information network for collecting information from inside and outside the facility; FIG. It is a longitudinal section block diagram of the said centrifugal separator. It is a figure for demonstrating an example of the operation pattern of the said centrifugal separator. It is a figure which shows the structure of the conventional centrifugal separator.

BEST MODE FOR CARRYING OUT THE INVENTION An AI-controlled centrifuge according to a preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings. However, the technical scope of the present invention is not construed to be limited by the embodiments described below.

(Description of overall configuration)
FIG. 1 shows an overall schematic configuration of a sewage treatment facility 3 in which a decanter 2 is arranged as a preferred example of a centrifugal separator, and an information network for collecting various information inside and outside the facility and fully automated operation of the decanter 2. 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 facilities such as a primary sedimentation tank 31, an aeration tank, and a final sedimentation tank. The aeration tank, the final sedimentation tank, etc. are shown as "downstream process" for convenience of drawing. Then, sewage collected from a sewage collection target area partitioned to include, for example, a plurality of municipalities, etc., is supplied to the primary sedimentation tank 31 for solid-liquid separation into supernatant liquid and primary sedimentation sludge. The supernatant liquid is transferred to the aeration tank, and the initial sludge is sent to the sludge treatment facility. The supernatant liquid from the primary sedimentation 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 a final sedimentation tank and solid-liquid separated into a supernatant liquid and a settled sludge. The supernatant liquid is further detoxified and then discharged, part of the settled sludge is returned to the aeration tank, and the rest is sent to the sludge treatment facility as surplus sludge.

A sludge treatment facility is a facility for treating the sludge generated in the water treatment facility described above, and is composed of thickening equipment, digestion equipment, dehydration equipment, and the like. FIG. 1 shows an example of a separation/concentration system facility. In this case, the initial sedimentation sludge from the primary sedimentation tank 31 is gravity thickened in the gravity thickening tank 32 , and the excess sludge from the final sedimentation tank is mechanically thickened in the mechanical thickener 33 . The mechanical concentrator 33 is a belt-type filter concentrator or the like, and a decanter-type centrifugal concentrator may be used. Sludge (thickened sludge) thickened by the gravity thickening tank 32 and the mechanical thickener 33 is supplied from the thickened sludge tank 34 through the pump 35 to the decanter 2 as a dehydrator, or is digested and then sent to the decanter 2. supply. The decanter 2 solid-liquid separates the sludge (thickened sludge), which is the treated liquid, into a dehydrated cake and a separated liquid. The dehydrated cake from the decanter 2 is supplied to an incinerator 37 via transfer equipment 36 such as a pressure feed pump and a conveyor, and is incinerated. Treatment other than incineration may be used. The overall configuration of the sewage treatment facility 3 is an example, and other facility configurations and treatment methods may be different, except for the AI-controlled decanter 2 of the present embodiment.

Next, an information network for collecting information for the decanter 2 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 history of the treatment facility 3 The operation status of is freely read and stored in a storage unit (eg, HDD). The information on the past operation status is, for example, the operation status of each facility (31 to 37) such as the decanter 2 and the incinerator 37, the chemical injection equipment for injecting chemical liquids such as flocculants into the sludge, pressure pumps, etc. Equipment load information, properties of sludge and liquid treated by each equipment (31-37), types and chemical dosing methods of chemicals such as polymer and inorganic flocculants, maintenance of each equipment (31-37), Information such as failure history is included. For these information, for example, daily driving records in which various data are recorded at predetermined time intervals may be used. An example of information used to realize fully automated operation is listed below. This information is used to pre-select/determine an appropriate operation pattern for operating the decanter 2 .

(A) An example of past operation information of a sewage treatment facility ・Record of operation status of decanter 2, for example, centrifugal force, differential speed, torque, power consumption, inverter frequency, chemical/chemical dosing method, etc. ・Conveyance equipment for dehydrated cake Records of loads, such as discharge pressure and motor current values of pressure pumps, motor current values of conveyors, etc. Records of operating conditions of the incinerator 37, such as furnace temperature and amount of fuel used. Maintenance history For example, causes of operational troubles and failures of each facility, maintenance plans, past maintenance records, etc.

Furthermore, one of the servers provided in the operation room 38 is configured to be able to collect information outside the sewage treatment plant 3 through the Internet line 4 as a preferred example of an information network, for example. Of course, information networks other than the Internet may be included. Furthermore, an information network that replaces the Internet may be employed. An example of information outside the sewage treatment plant is listed below. Such information is various environmental information of the sewage collection target area to be processed by the facility, and is used to preselect and determine 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, such as the ratio of residences, commercial facilities, and factories in the area, collection methods such as separate and combined systems, etc. ・Each sewage collection target area Sewage inflow information that flows into the pumping station 41 For example, pump flow rate and sewage storage volume in each pumping station, sewage flow rate in major masses in the area, etc. Construction information on sewage-related facilities in sewage collection target areas For example, maintenance work at each pumping station , replacement work of sewage pipes and masses in the area, etc. ・Information on events held in the sewage collection target area For example, information on large events such as sports and concerts where people gather from outside the area

(C) An example of weather information for sewage collection target areas 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 of the day)
For example, information on the current state of the area divided by city, ward, town, etc.

(D) Examples of other information on sewage collection target areas ・Amount of river water flowing in the area, sedimentary sand discharged from dams, etc. ・Power generation status of electric power companies, etc.

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

Furthermore, at least one of the servers provided in the operation room 38 stores the current operation status of the sewage treatment facility 3 when the decanter 2 is in operation, for example, each facility (31 ~ 37) operating status, chemical injection equipment for injecting chemicals such as flocculants into sludge, load information on ancillary equipment such as pressure feed pumps, properties of sludge and liquid treated by each facility (31 ~ 37), Current actual information such as selected types of chemicals such as polymer and inorganic flocculants, chemical dosing methods, maintenance and failure status of each facility (31 to 37) can be collected. These actual information are collected by being transmitted from a control section (for example, a control panel) 42 of each piece of equipment, or transmitted by an operator patrolling the site using a communication device 43 . Such actual information also utilizes information collected from outside the facility to determine whether or not the preselected/determined operation pattern of the decanter 2 was appropriate, and if not appropriate, the operation pattern is reset. used for Furthermore, it is used to correct the driving pattern itself when it is determined that the driving pattern is not appropriate. An example of information used to reset or correct the driving pattern is 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 dosing method, etc. ・Conveyance equipment for dehydrated cake Load For example, the discharge pressure and motor current value of the pressure feed pump, the motor current value of the conveyor, etc. ・Operating conditions of the incinerator 37, for example, furnace temperature, fuel consumption, etc. ・Occurrence of operating troubles and failures of each facility, for example, Occurrence of operational troubles and failures of each facility and their causes, etc. (F) An example of current weather information in the sewage collection target area ・Current conditions such as weather, temperature, humidity, rainfall, etc. Actual information subdivided by ward unit, town unit, etc.

(Description of the configuration of the decanter 2)
Next, an example of the configuration of the decanter 2 will be described with reference to FIG. The decanter 2, as shown in FIG. A screw conveyor 6 for conveying a solid phase and a supply nozzle 7 for supplying a treated liquid derived from sewage sent from a thickened sludge tank 34 into the bowl 5 are provided. Both shafts of the bowl 5 are supported by a bearing mechanism 22 such as a bearing arranged outside the casing 2 . Furthermore, the screw conveyor 6 is supported at both shafts by a bearing mechanism 23 such as a conveyor bearing. Reference numeral 24 denotes a partition wall that partitions the space inside the casing 2. As shown in FIG.

When the power of the main motor 25, which is the driving mechanism, is transmitted to the pulley 25b on the bowl 5 side through the rotating belt 25a, the bowl 5 rotates, and the gear box 26 and the spline shaft 26a, which are the differential speed generating device. Rotational power is transmitted to the screw conveyor 6 through the shaft 5, 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 within the range of 500 to 8000 rpm, and the screw conveyor 6 is rotated at a differential speed of 0.5 to 50 rpm with respect to the bowl 5 to perform centrifugal separation. I do.

A motor called a back drive motor 27 is connected to the gearbox 26 via a rotating belt 27a and a pulley 27b. The back drive motor 27 is for braking so that the screw conveyor 6 rotates slower than the bowl 5 . Regenerative power generated in the backdrive motor 27 by braking can be supplied to the main motor 25 . However, the back drive motor 27 may not necessarily be provided. Reference numeral 28 denotes a support stand for the decanter 2, and reference numeral 29 denotes a support member for supporting the supply nozzle 5. As shown in FIG.

The bowl 5 is formed with a conical portion 51 at one end of a cylindrical body, and a disk-shaped member called a front hub 52 is provided at the other end. A body portion of the bowl 5 forms a pool (liquid pool) portion for the processing liquid to be 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 a dehydrated cake, which is dewatered sludge, is formed at the end of the conical portion 51 . is provided. Further, the front hub 52 is provided with a liquid phase discharge port 54 through which the liquid phase, which is the separated liquid, overflows and is discharged. The liquid phase outlet 54 is a circular opening that penetrates the front hub 52 .

Screw blades 61 for conveying the solid phase in the bowl 5 are spirally provided on the outer peripheral surface of the screw conveyor 6 . Furthermore, a supply hole 62 is provided on the outer peripheral surface of the screw conveyor 6 . The supply hole 62 communicates with a 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 contact the rotating bowl 5 and screw conveyor 6 . A pipe from liquid feeding means (not shown in FIG. 2) such as a pump 35 is connected to the proximal end of the supply nozzle 7 . The processing liquid sent by the liquid feeding means is discharged into the liquid supply chamber 63 from the tip of the supply nozzle 7, and the processing liquid supplied into the liquid supply chamber 63 is subjected to the centrifugal force of the rotating screw conveyor 6. It is discharged from the supply hole 62 by the action and supplied into the bowl 5, and is separated into the dehydrated cake and the separated liquid by the action described above and discharged.

The decanter 2 is provided with a control unit 8 that selects and determines an operation pattern in advance and controls the operation of each component of the decanter 2 such as the main motor 25 and incidental equipment such as chemical injection equipment and pressure pumps according to the operation pattern. 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, or the like. A computer system includes, for example, a CPU, a memory, and a storage unit (eg, HDD), etc., and implements desired processing functions by reading programs stored in the storage unit and executing the programs by the CPU. That is, by these computer systems, information collection means, driving pattern storage means, driving pattern selection/determining means, operation control means, driving information collecting means, driving pattern re-selecting means, and driving pattern correction means for executing the AI control method is configured.

The operation pattern is, for example, as schematically shown in FIG. As an example, there are three patterns of "standard operation model", "post-rain operation model", and "increase treatment amount model when the amount of sewage is large". The information of these multiple operation patterns is stored in a storage unit (for example, HDD) so that the control unit 8 can freely read it. These three driving patterns are basic forms prepared in advance, and as a preferred example is explained below, the number of driving patterns increases and/or the patterns become more complicated as the driving is repeated by the artificial intelligence function. By making it possible to apply more operation patterns, fully automated operation with a higher degree of perfection 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 operating patterns, it is possible to adopt operating conditions in which the type and specifications of the decanter 2 are associated with the properties of the treatment liquid, and operating conditions in which the differential speed - properties of the treatment liquid - chemical injection amount are associated. Each model can be patterned into, for example, a "standard operation model", "post-rain operation model", "increase treatment amount model when sewage volume is large", and the like. Of course, the classification is not limited to "standard", "after rainfall", and "when the amount of sewage is large".

Next, an example of fully automated operation of the decanter 2 will be described.
For example, on the morning of the day of operation, the server in the operation room 38 reads the data of the operation status of the sewage treatment facility 3 from the storage unit on the previous day, and the operating conditions of the decanter 2 on the previous day are the "standard operation model" and the "operation after rainfall". model” or “model of increase in treatment amount when 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 that the vehicle was driven according to the "driving model after rainfall" the day before.

On the other hand, for example, if the weather forecast for the day of driving announced the day before through the Internet line 4 is for the summer season (July to August), sunny weather, a temperature of 30° C., and a humidity of 70%, the control unit 8 , driving with the "standard driving model" is a candidate. 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 flow will increase due to the large number of people who gather from outside the area. Another candidate is the increased processing amount model. Furthermore, for example, if some of the pumping stations 41 are scheduled to temporarily stop operation due to maintenance work, the amount of sewage sent to the sewage treatment facility 3 will be reduced accordingly. decide to choose. However, the centrifugal force (G) is 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 of the sludge deteriorates due to corrosion and deterioration of the sludge.

In other words, in the case of "clear weather", the basic model is to select the "standard operation model". Finally, in the "standard operation model", the initial centrifugal force is set to the highest 1800 G, and the torque value (control value) of the screw conveyor 6 is set to 32 N m in order 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 the season, the weather, the event, and the construction work. Of course, the driving pattern may be selected/determined based on other information to be collected. Furthermore, for each piece of environmental information, the timing may be taken into account, such as the influence of the next day or the day after next.

After a predetermined period of time (for example, several hours) has elapsed since the operation of the decanter 2 was started, the control unit 8 collects information from inside and outside the facility and determines whether the selected operation pattern is appropriate. For example, the dehydrated cake contains a lot of sand, so if the torque value is set to 32 N·m, the moisture content is too low, and the load on the pressure feed pump as the transfer equipment 36 for conveying the dehydrated cake is increased. Suppose For the load of the compressing pump, for example, a discharge pressure threshold value is set in advance, and when the threshold value is exceeded, it is determined that the load is in an increased state. Other information can also be determined using a threshold. In this case, even if the weather forecast is sunny, if it rained the day before yesterday, the control unit 8 changes (reselects) to the "post-rain driving model" according to the amount of rain, for example, and continues driving. to Specifically, even if the forecast for the day is sunny, it is assumed that it rained more than a preset threshold value (for example, 200 mm) the day before yesterday, and the model is changed to the "driving model after rain". For example, the same applies when a guerrilla thunderstorm occurs in a part of the area.

Furthermore, the control unit 8 changes the method of selecting future operation patterns, and selects the "standard operation model" in the case of a combination of "summer season" - "sunny weather" - "with events" - "with construction". This is the first candidate, but as an exception, in the case of a combination of "season is summer" - "weather is fine" - "there was rainfall exceeding the threshold the day before yesterday" - "event" - "construction", "after rain" driving model”. In this way, the AI control function can be improved by subdividing the combinations of information that serve as options for the driving pattern each time the vehicle is driven. As an example, the control unit 8 executes control functions by creating (updating) a database in which combinations of information and driving patterns to be selected are arranged in a matrix form. Selection of the operation pattern includes selection of various settings (centrifugal force, chemicals, etc.) within the pattern as described above.

Furthermore, if the rain the day before yesterday was a short-term rainfall, such as a shower, and the operation was performed under the "operation model after rain", the water content gradually increased, and the amount of fuel used in the incinerator 37 increased. Suppose In this case, the control unit 8 determines that the current operating pattern cannot cope with the situation, and generates a new operating pattern. Determination can be made by setting a threshold value, for example. Specifically, for example, a new "driving model after short-term rainfall" is generated and stored by setting the slope of the correlation curve between torque and moisture content to an intermediate position between the "standard driving model" and the "driving model after rainfall". save to the From now on, for the combination of "summer season" - "clear weather" - "short-term rainfall exceeding the threshold the day before yesterday" - "event" - "construction", "after a short-term rainfall" 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 and enabling fine control to be performed.

In addition to the information used in the above example of control, for example, information on the ratio of housing, commercial facilities, and factories in the area, for example, changes in the flow rate and properties of sewage on weekdays and weekends on a weekly basis are reflected in the control. It can be used as information, and information on collection methods such as the separate flow system and the combined system can be used to parameterize the degree of influence of rainfall (high, medium, low). In addition, the weather information that subdivides the area by city unit, ward unit, town unit, etc. can be repeatedly used for the above control, and a distribution map that affects sewage can be generated and used for control. good. For example, if the collection area is composed of A city to D city, if the amount of rainfall in A city and C city is large, the effect is large.

In addition, regarding the power generation situation of the electric power company, for example, when the amount of power used in the power transmission area increases due to extreme heat, for example, a model with an increased processing flow rate is selected at night and a model with a reduced processing flow rate is operated during the daytime. 2 can be used for low power operation. In other words, fully automated operation that contributes to power saving is realized.

In addition, the history of operational troubles and failures of each facility is stored in the storage unit as information (database) associated with the environmental conditions and operating conditions at that time, for example, and used to avoid operational troubles and failures. be able to. That is, for example, in the case of a combination of the above environmental conditions "summer season" - "clear weather" - "event" - "construction", under certain operating conditions (centrifugal force, torque, chemical injection method, etc.) If there is a history of operational trouble, the control unit 8 will not select that operational condition. This makes it possible to realize fully automated operation that avoids operational troubles and failures of equipment.

According to the above-described embodiment, predetermined information is selectively 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, it is possible to set (or reset) an appropriate operation pattern of the decanter 2 by utilizing information collected inside and outside the sewage treatment plant 3. Automated driving can be made feasible. 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 selectively collected information, as described in detail above. It is meant to perform method control. For example, even if an operation by an operator such as an operation for starting the apparatus or an operation for adjusting the flow rate is involved, if the control by the decanter 2 is performed, it is included in the fully automated operation.

Furthermore, during the operation of the decanter 2 according to the operation pattern, information on the properties of the dehydrated cake and / or the separated liquid, the load status of the auxiliary equipment of the decanter 2, the operation status of the treatment equipment such as the incinerator 37 By collecting predetermined information from the system and correcting the driving pattern based on the collected information, fully automated driving with a higher degree of perfection can be realized.

Although the present invention has been described in detail with reference to specific embodiments, various substitutions, modifications, changes, etc. in terms of form and details may be made within the scope of the present invention as defined by the scope of the claims. It will be clear to those of ordinary skill in the art that things can be done without departing from the spirit and scope.

2 decanter 3 sewage treatment plant 38 operation room 4 internet connection 5 bowl 6 screw conveyor 8 control unit

Claims (5)

In a centrifugal separator that separates a treated liquid derived from sewage containing sludge into a dehydrated cake and a separated liquid,
Information collecting means for selectively collecting a plurality of types of information from the operation information of the sewage treatment facility in which the centrifugal separator is installed, and an operation pattern storage having a plurality of operation patterns in advance for the control method of the centrifugal separator. driving pattern selecting/determining means for selecting at least one of the plurality of driving patterns based on the plurality of types of information collected by the information collecting means; and driving pattern selecting/determining means selected by the driving pattern selecting/determining means. Operation control means for controlling the operation of the centrifugal separator according to the operation pattern, the properties of the dehydrated cake and/or the separated liquid when the centrifugal separator is operated according to the operation pattern, and ancillary equipment of the centrifugal separator. operation information collection means for collecting predetermined information from the load status of the sewage treatment facility, the operation status of the treatment equipment arranged in the process downstream of the centrifugal separator in the sewage treatment facility, and the information collected by the operation information collection means A fully automated operation control unit including an operation pattern reselection means for determining whether the selection of the operation pattern is appropriate based on the judgment result, and reselecting another operation pattern when the determination result is negative ,
The reselected driving pattern is newly stored in the driving pattern storage means in association with the plurality of types of information selectively collected by the information collection means,
The driving pattern selecting/determining means selects the reselected driving pattern as a first candidate when the information selectively collected by the information collecting means is a combination of the plurality of types of information. AI-controlled centrifugal separator. In a centrifugal separator that separates a treated liquid derived from sewage containing sludge into a dehydrated cake and a separated liquid,
Information collecting means for selectively collecting a plurality of types of information from the operation information of the sewage treatment facility in which the centrifugal separator is installed, and an operation pattern storage having a plurality of operation patterns in advance for the control method of the centrifugal separator. driving pattern selecting/determining means for selecting at least one of the plurality of driving patterns based on the plurality of types of information collected by the information collecting means; and driving pattern selecting/determining means selected by the driving pattern selecting/determining means. Operation control means for controlling the operation of the centrifugal separator according to the operation pattern, the properties of the dehydrated cake and/or the separated liquid when the centrifugal separator is operated according to the operation pattern, and ancillary equipment of the centrifugal separator. operation information collection means for collecting predetermined information from the load status of the sewage treatment facility, the operation status of the treatment equipment arranged in the process downstream of the centrifugal separator in the sewage treatment facility, and the information collected by the operation information collection means A fully automated operation control unit including an operation pattern correction means for correcting the control method of the operation pattern based on
The corrected driving pattern is newly stored in the driving pattern storage means in association with the plurality of types of information selectively collected by the information collection means,
The driving pattern selecting/determining means selects the corrected driving pattern as a first candidate when the information selectively collected by the information collecting means is a combination of the plurality of types of information. AI-controlled centrifugal separator. In a centrifugal separator that separates a treated liquid derived from sewage containing sludge into a dehydrated cake and a separated liquid,
Information collecting means for selectively collecting a plurality of types of information from the operation information of the sewage treatment facility in which the centrifugal separator is installed, and an operation pattern storage having a plurality of operation patterns in advance for the control method of the centrifugal separator. driving pattern selecting/determining means for selecting at least one of the plurality of driving patterns based on the plurality of types of information collected by the information collecting means; and driving pattern selecting/determining means selected by the driving pattern selecting/determining means. A fully automated operation control unit including an operation control means for controlling the centrifuge to operate according to an operation pattern,
The operation pattern includes the properties of the dehydrated cake and/or the separated liquid when the centrifugal separator is actually operated, the load status of the incidental equipment of the centrifugal separator, and the process downstream of the centrifugal separator in the sewage treatment facility. An operation pattern in which a computer system sets operating conditions so that a dehydrated cake having a desired water content is obtained based on predetermined information collected from the operating conditions of the treated treatment equipment, wherein the operating conditions are the treatment 1. An AI-controlled centrifugal separation device characterized by including two or more set values of centrifugal force, torque, differential speed, and liquid injection amount associated with liquid properties. 2. The information selectively collected by said information collecting means includes any one of an operating condition of said centrifugal separator, a load of said dehydrated cake conveying equipment, and an operating condition of said dehydrated cake incinerator. 4. The AI-controlled centrifugal separator according to any one of 1 to 3 . The operation pattern includes the properties of the dehydrated cake and/or the separated liquid when the centrifugal separator is actually operated, the load status of the incidental equipment of the centrifugal separator, and the process downstream of the centrifugal separator in the sewage treatment facility. An operation pattern in which a computer system sets operating conditions so that a dehydrated cake having a desired water content is obtained based on predetermined information collected from the operating conditions of the treated treatment equipment, wherein the operating conditions are the treatment 3. The AI-controlled centrifugal separator according to claim 1 or 2, comprising two or more set values of centrifugal force, torque, differential speed, and chemical solution injection amount associated with liquid properties.

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