JP2023006327A - Control device, heat dewatering system, control method and program - Google Patents

Abstract

To provide a control device, a heat dewatering system, a control method and a program, even when a sludge temperature is changed in a sludge dewatering machine, capable of driving the sludge dewatering machine so that dewatered sludge having a stable water content is discharged.SOLUTION: A control device comprises: a target value acquisition part for acquiring a first target value regarding the control of a sludge dewatering machine, determined in accordance with the driving state of an incinerator incinerating dewatered sludge dewatered by the sludge dewatering machine; a sludge information acquisition part for acquiring sludge information including at least a sludge temperature as a temperature of the dewatered sludge; a target value determination part for determining a second target value regarding the control of a controlled object having a correlation with the first target value from a relation between the acquired first target value and the acquired sludge information; and a control part for controlling the controlled object in accordance with the determined second target value.SELECTED DRAWING: Figure 2

Description

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

Conventionally, in a sludge dehydrator such as a screw press or a centrifugal dehydrator, the water content of the sludge discharged from the sludge dehydrator (hereinafter also referred to as "dewatered sludge") is estimated based on the shaft torque of the screw shaft. is possible. Attempts have been made to keep the moisture content of the dewatered sludge constant by performing constant torque control according to the estimated moisture content.

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

JP 2020-114569 A

By the way, the viscosity of sludge changes due to changes in sludge temperature, and changes in sludge properties due to changes in sludge temperature. When the viscosity of the sludge changes due to the change in the sludge temperature, the relationship between the shaft torque of the sludge dehydrator and the water content of the dewatered sludge also changes. Therefore, when the sludge temperature changes in the sludge dehydrator, it is preferable to consider the change in the sludge temperature in order to keep the moisture content of the dehydrated sludge constant.
However, the technique of Patent Document 1 does not consider changes in sludge temperature. Therefore, when the sludge temperature changes in the sludge dewatering machine, the method of controlling the water content of the dewatered sludge, such as the technique of Patent Document 1, maintains the water content of the dewatered sludge discharged from the sludge dewatering machine constant. It is difficult.

In view of the above problems, the object of the present invention is to provide a control device capable of operating a sludge dehydrator so that dewatered sludge with a stable moisture content is discharged even when the sludge temperature changes in the sludge dehydrator, a heating It is to provide a dehydration system, a control method, and a program.

In order to solve the above-described problems, a control device according to an aspect of the present invention controls the sludge dehydrator, which is determined according to the operating state of an incinerator that incinerates dehydrated sludge dehydrated by the sludge dehydrator. a target value acquisition unit that acquires a first target value for the dehydrated sludge, a sludge information acquisition unit that acquires sludge information including at least a sludge temperature that is the temperature of the dehydrated sludge, and the acquired first target value and the acquisition a target value determination unit that determines a second target value related to control of a controlled object that is correlated with the first target value from the relationship of the sludge information that has been obtained; , and a control unit that controls the controlled object.

A heating dehydration system according to one aspect of the present invention includes a control device.

In a control method according to an aspect of the present invention, a target value acquisition unit is determined according to the operating state of an incinerator that incinerates dehydrated sludge dehydrated by the sludge dehydrator. a target value acquisition process of acquiring the target value of; a sludge information acquisition process in which the sludge information acquisition unit acquires sludge information including at least the sludge temperature that is the temperature of the dewatered sludge; A target value determination process for determining a second target value related to control of a controlled object correlated with the first target value from the relationship between the first target value and the acquired sludge information, and a control unit and a control process for controlling the controlled object according to the determined second target value.

A program according to an aspect of the present invention causes a computer to set a first target value related to control of the sludge dehydrator, which is determined according to the operating state of an incinerator that incinerates dehydrated sludge dehydrated by the sludge dehydrator. Target value acquiring means to acquire, sludge information acquiring means for acquiring sludge information including at least the sludge temperature which is the temperature of the dehydrated sludge, and the relationship between the acquired first target value and the acquired sludge information a target value determining means for determining a second target value relating to control of the controlled object correlated with the first target value; and controlling the controlled object according to the determined second target value. It functions as a control means.

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

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows an example of a structure of the heating dehydration system 1 which concerns on 1st Embodiment. 2 is a block diagram showing an example of the functional configuration of the control panel 100 according to the first embodiment; FIG. 4 is a diagram showing an example of input/output in the control panel 100 according to the first embodiment; FIG. 4 is a flow chart showing an example of the operation of the control panel 100 according to the first embodiment; FIG. 11 is a block diagram showing an example of the functional configuration of a control panel 100a according to the second embodiment; FIG. FIG. 11 is a diagram showing an example of priorities of controlled objects according to the second embodiment; FIG. FIG. 7 is a diagram showing an example of input/output in a control panel 100a according to the second embodiment; 9 is a flow chart showing an example of the operation of the control panel 100a according to the second embodiment; FIG. 13 is a block diagram showing an example of the functional configuration of a control panel 100b according to the third embodiment; FIG. FIG. 11 is a diagram showing an example of input/output in a control panel 100b according to the third embodiment; FIG. 11 is a flow chart showing an example of the operation of a control panel 100b according to the third embodiment; FIG. FIG. 14 is a block diagram showing an example of the functional configuration of a control panel 100c according to the fourth embodiment; FIG. FIG. 11 is a diagram showing an example of input/output in a control panel 100c according to the fourth embodiment; FIG. 14 is a flow chart showing an example of the operation of the control panel 100c according to the fourth embodiment; FIG. FIG. 14 is a block diagram showing an example of a functional configuration of a control panel 100d according to a fifth embodiment; FIG. FIG. 14 is a diagram showing an example of input/output in a control panel 100d according to the fifth embodiment; FIG. 14 is a flow chart showing an example of the operation of the control panel 100d according to the fifth embodiment; FIG. FIG. 14 is a block diagram showing an example of the functional configuration of a control panel 100e according to the sixth embodiment; FIG. FIG. 14 is a diagram showing an example of input/output in a control panel 100e according to the sixth embodiment; FIG. 14 is a flow chart showing an example of the operation of the control panel 100e according to the sixth embodiment; FIG.

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 dewaterer.

In the following embodiments, the first target value is a target value related to control of the sludge dehydrator, which is determined according to the operating state of the incinerator that incinerates the dewatered sludge dehydrated by the sludge dehydrator.
The first target value is, for example, the moisture content of the dehydrated sludge, which is the desired moisture content of the dewatered sludge in the incinerator. Further, the first target value is, for example, the shaft torque of the rotary drive unit of the sludge dewatering machine, and may be the shaft torque necessary to obtain dehydrated sludge with a desired moisture content in the incinerator. .
A 2nd target value is a target value regarding control of a controlled object with a correlation with a 1st target value from the relationship of a 1st target value and sludge information. For example, if the first target value is the water content of the dehydrated sludge, the second target value is the shaft torque required to obtain the dewatered sludge with that water content. Further, when the first target value is the axial torque of the rotary drive section of the sludge dehydrator, the second target value is an operating parameter of the sludge dehydrator other than the axial torque of the rotary drive section of the sludge dehydrator. The operating parameters are, for example, the addition rate of flocculant, injection pressure, back pressure closing rate, differential speed, centrifugal acceleration, sludge supply amount, heat medium temperature, heat medium flow rate, polymer flocculant dosing rate, and the like.

The sludge information is information including at least the sludge temperature, which is the temperature of the sludge dehydrated by the sludge dehydrator. In addition to the sludge temperature, the sludge information includes, for example, the sludge mixing ratio, the amount of sludge supplied, the polymer coagulant dosing rate, the polymer coagulant viscosity, and the coagulant addition rate.
The controlled object includes, for example, a controllable part of the sludge dehydrator including the rotary drive unit, and a pump that supplies sludge, a polymer coagulant, warm water, etc. to the sludge dehydrator.

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

The target shaft torque determination model uses the target water content of the dehydrated sludge as the first target value, and from the target water content and sludge information, the target shaft torque, which is the target value of the shaft torque in the rotary drive part of the sludge dewatering machine, is determined as the first target value. 2 is a model determined as a target value.
The target operating parameter determination model uses the target shaft torque in the rotary drive unit of the sludge dehydrator as the first target value, and uses the target shaft torque and the sludge information to determine the target value of the sludge dehydrator operating parameter other than the shaft torque. This model determines a certain target operating parameter as a second target value.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

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

<1-1. Configuration of heated dehydration system>
First, with reference to FIG. 1, the configuration of the thermal dehydration system according to the first embodiment will be described. FIG. 1 is a diagram showing an example of the configuration of a heated dehydration system according to the first embodiment.
In the first embodiment, the thermal dehydration system 1 includes a coagulator 10, a thickener 20, a thickened sludge supply pump 30, a coagulant supply pump 40, a coagulant flow meter 45, an injection pressure sensor 48, and a thermal dehydrator 50. , torque sensor 51 , thermo-thermometer 52 , dehydrated sludge hopper 55 , heat medium supply pump 60 , heat medium flow meter 65 , dehydrated sludge supply pump 70 , sludge flow meter 78 , incinerator 80 and 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 and flocculated. The coagulation tank has a stirring function for stirring the organic sludge A and the polymer flocculant B. Organic sludge A and polymer flocculant B are stirred and mixed to flocculate. The flocculation device 10 supplies the flocculated organic sludge A as flocculated sludge C to the thickening device 20 .

The thickening device 20 thickens the flocculated sludge C flocculated by the flocculation device 10 . For example, the thickener 20 has a thickening filter screen inside, and the thickening filter screen concentrates the flocculated sludge C supplied from the flocculating device 10 by separating moisture.
The thickened sludge supply pump 30 supplies the thickened sludge discharged from the thickener 20 to the heating dehydrator 50 as the thickened sludge D. As shown in FIG.

The output side of the coagulant supply pump 40 is connected to a path connecting the thickened sludge supply pump 30 and the heating dehydrator 50 . The coagulant supply pump 40 supplies a coagulant to the thickened sludge D supplied from the thickened sludge supply pump 30 to the heating dehydrator 50 . The supplied flocculant is at least one of a polymer flocculant and an inorganic flocculant. In the first embodiment, the case where the inorganic flocculant E is supplied will be described. For this inorganic flocculant, for example, polyferric sulfate (PFS) can be used.
The coagulant flow meter 45 measures the amount of coagulant supplied from the coagulant supply pump 40 to the thickened sludge D, and outputs the measurement result to the control panel 100 .
The injection pressure sensor 48 detects the injection pressure of the thickened 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 thickened sludge D supplied from the thickened sludge supply pump 30 . When the inorganic coagulant is supplied to the thickened sludge D by the coagulant supply pump 40, the heating dehydrator 50 dehydrates the thickened sludge D after the inorganic coagulant is injected.
In the first embodiment, the case where the thermal dehydrator 50 is a vertical screw press will be described. good too.

In the heating dehydrator 50, a filter screen 50B for filtering the thickened sludge D is arranged in the casing 50A. Thickened sludge D is supplied.

The heating dehydrator 50 also includes an inner filtration screen 50Ba, an outer filtration screen 50Bb, and a ribbon screw 50d. The inner filter screen 50Ba, as the second filter screen 50B, is arranged in the casing 50A in a cylindrical or conical shape centered on a longitudinally extending axis coaxial with the casing 50A. The outer filter screen 50Bb has a cylindrical or conical shape coaxial with the inner filter screen 50Ba, and is arranged inside the casing 50A with a gap outside the inner filter screen 50Ba. The ribbon screw 50d is housed between the inner filter screen 50Ba and the outer filter screen 50Bb in a helical shape twisted around the axis, and is rotated around the axis by a rotary drive unit 50c such as a motor. and the outer filter screen 50Bb.

The casing 50A has a bottomed cylindrical shape centered on the axis. The inner filter screen 50Ba and the outer filter screen 50Bb are made of, for example, wedge wires or punching metal.
Thickened sludge D is supplied to the space between the inner filter screen 50Ba and the outer filter screen 50Bb as the first space 50A1.
The space outside the outer filter screen 50Bb and on the inner peripheral side of the casing 50A is the second space 50A2.
The space inside the inner filtration screen 50Ba is the third space 50A3.

The heating section 50A4 heats the thickened sludge D in the heating dehydrator 50. As shown in FIG. For example, the heating section 50A4 heats the storage section in which the thickened sludge D is stored from the outer peripheral side. In this embodiment, the heating unit 50A4 is supplied with hot water H from the heat medium supply pump 60 to the space outside the outer filter screen 50Bb and on the inner peripheral side of the casing 50A (that is, the second space 50A2). As a result, the filtrate is mixed with the hot water H, and as a result, the temperature of the filtrate rises and the temperature of the second space 50A2 rises, so heat is transferred to the thickened sludge D through the outer filtration screen 50Bb, and the thickened sludge D can be warmed. In this manner, the housing portion is heated from the outer peripheral side.
Here, a case where the storage unit is the filter screen 50B will be described, but it is sufficient if the thickened sludge D supplied from the outside of the heating dehydrator 50 can be heated. If the thickened sludge D is stored in the storage unit, for example, the filter screen 50B may be provided with a storage portion where no filter screen is formed in the axial direction, and the storage portion may be heated. Alternatively, both the containing portion and the filter screen 50B may be heated.

The heating section 50A4 may heat the entire housing section, may heat a partial area in the axial direction, or may heat a partial area in the circumferential direction. You may do so.

Moreover, although the hot water H is used as the medium for heating the storage portion, other media may be used as long as the storage portion can be heated. Alternatively, a heater or the like may be used.

The temperature of the hot water H should be higher than the temperature of the thickened 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 lowering the viscosity of the thickened sludge D and separating the moisture cannot be sufficiently obtained. Moreover, when the temperature of the hot water H exceeds 100° C., the degree of difficulty in handling increases. The higher the temperature of the hot water H, the lower the viscosity of the thickened sludge D and the more the moisture separation due to the heat denaturation of the protein can be promoted. When used as hot water H, a temperature range of 60° C. or higher and 90° C. or lower is practical.

Such 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 thus supplied to the second space 50A2 heats the thickened sludge D in the first space 50A1. By heating the thickened sludge D with the hot water H as a heat medium, the protein of the thickened sludge D is thermally denatured and the retained water is separated. The viscosity of the thickened sludge D is lowered by heating the thickened sludge D using the hot water H as a heat medium. The thickened sludge D is filtered by the inner filtration screen 50Ba and the outer filtration screen 50Bb.
The filtrate is discharged as waste water J from a drain pipe 50H raised from the second space 50A2. Moreover, the hot water H cooled by heating the thickened sludge D is discharged as the waste water J from the drain pipe 50H together with the filtrate.

The connecting plate 50e connects the bottoms of the inner filter screen 50Ba and the outer filter screen 50Bb. The shape of the connecting plate 50e is an annular plate 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 separated from water by the inner filtration screen 50Ba and the outer filtration screen 50Bb while being conveyed upward by the relative rotation of the ribbon screw 50d. Here, since a large filtration area can be secured, more efficient filtration can be achieved.

In addition, an annular plate-shaped substrate 50C is arranged in the upper part of the casing 50A. The outer filter screen 50Bb is attached and fixed to the inner periphery of this substrate 50C. Furthermore, a lid 50D is provided in the upper opening of the casing 50A above the substrate 50C, and the inner filter screen 50Ba is attached and fixed to the lid 50D.
The rotary drive unit 50c is arranged on the lid 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 filter screen 50Ba and the outer filter screen 50Bb are thus fixed to the casing, and the ribbon screw 50d is rotated by the rotation drive section 50c. Alternatively, the ribbon screw 50d and the inner and outer filter screens 50Ba and 50Bb may be rotated in directions opposite to each other.

In the casing 50A, an upper space between the substrate 50C and the lid body 50D serves as a discharge chamber 50E, and an annular upper opening of the first space 50A1 in the discharge chamber 50E serves as a discharge port 50F. be done. The discharge port 50F is provided with a back pressure plate 50G having an outer peripheral surface in the shape of a truncated cone centered on the above-described axis that extends upward toward the outer peripheral side.
The dehydrated sludge I, which is conveyed upward in the first space 50A1 by the ribbon screw 50d while being separated from the water content and dehydrated from the thickened sludge D, flows out from the discharge port 50F into the discharge chamber 50E while being compressed by the back pressure plate 50G. Ejected.
A back pressure plate driving portion is attached to the back pressure plate 50G. The back pressure plate driving section moves the back pressure plate in the longitudinal direction of the axis so that the opening degree is in accordance with the instruction from the control panel 100 .
The back pressure sensor 50Gs detects the degree of opening of the back pressure plate.

A torque sensor 51 measures the axial torque in the heating dehydrator 50 . For example, the torque sensor 51 is provided so as to be able to measure the torque of the rotation drive section 50c. The torque sensor 51 measures the torque of the rotary drive section 50c as the axial torque in the heating/dehydrating machine 50, and outputs the measurement result to the control panel 100. FIG.

The thermo-thermometer 52 measures the temperature of the sludge (sludge temperature) dehydrated by the heating dehydrator 50 . For example, the thermo-thermometer 52 is provided so as to be able to measure the temperature of the dehydrated sludge I that has been dehydrated and discharged into the discharge chamber 50E. The thermo-thermometer 52 measures the sludge temperature of the dehydrated sludge I discharged into the discharge chamber 50E and outputs the measurement result to the control panel 100. FIG.

The dehydrated sludge I discharged from the heating dehydrator 50 is temporarily stored in the dehydrated sludge hopper 55 . The dehydrated sludge I stored in the dehydrated sludge hopper 55 is supplied to the incineration facility 80 by the dehydrated sludge supply pump 70 .
The dehydrated sludge hopper 55 is provided with a weight scale (not shown). A weight scale provided in the dehydrated 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 starting the supply of the dewatered sludge I and the weight of the dewatered sludge hopper 55 in a state where the supply of the dewatered sludge I is temporarily stopped after the supply of the dehydrated sludge I is started. do. The amount of dewatered sludge I supplied to the incinerator 80 can be calculated from the weight difference.

The heating medium supply pump 60 supplies the heating medium heated by the heat obtained by burning the sludge discharged from the heating dehydration system 1 to the heating dehydrator 50 (for example, the heating section 50A4).
The heat medium flowmeter 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. FIG.

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

The incinerator 80 incinerates the dehydrated sludge I discharged from the heating dehydrator 50 . The incineration facility 80 includes an incinerator 81 , a boiler 82 and a flue gas treatment tower 83 . The incinerator 81 incinerates the dehydrated sludge I supplied from the heating dehydrator 50 . If the incinerator 81 can be operated so that the moisture content of the dehydrated sludge I is close to the self-ignition point, the dehydrated sludge I can be burned without using auxiliary fuel. Therefore, it is preferable that the water content of the dehydrated sludge I fluctuate less. In addition, since the water content of the dewatered sludge I does not fluctuate from the vicinity of the self-ignition point, there is no need to use auxiliary fuel, and there is no need to lower the temperature in the incinerator 81 by spraying water, etc., and wasteful dehydration (water content too low) can be suppressed.

The boiler 82 uses the heat of the flue gas from the incinerator 81 to heat the heat medium with a heat exchanger. As the heat medium, for example, water supplied from the flue gas treatment tower 83 can be used. The water supplied from the flue gas treatment tower 83 is 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 . As a result, the heating medium heated by using the heat of the combustion exhaust gas can be supplied to the heating dehydrator 50 .

The flue gas treatment tower 83 removes predetermined substances such as dust and impurities from the flue gas supplied from the boiler 82 by spraying water supplied from the outside, and exhausts the flue gas from the chimney. Further, the flue gas treatment tower 83 heats the water supplied from the outside by the heat of the flue gas, and supplies the water 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. Functional configuration of the control panel>
The configuration of the thermal dehydration system 1 according to the first embodiment has been described above. Next, with reference to FIG. 2, the functional configuration of the control panel 100 according to the first embodiment will be described. 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 section 110 , a target value acquisition section 120 , a sludge information acquisition section 130 , a storage section 140 , a target value determination section 150 and a control section 160 .

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

(2) Target value acquisition unit 120
The target value acquiring unit 120 acquires a first target value related to the control of the heating dehydrator 50, which is determined according to the operating state of the incinerator 81 that incinerates the dewatered sludge dehydrated by the heating dehydrator 50. . For example, the target value acquiring unit 120 acquires the desired water content of the dewatered sludge in the incinerator 81 (hereinafter also referred to as “target water content”) as a first target value. As an example, the target value acquiring unit 120 acquires the target moisture content output from a control device or the like of the incineration facility 80 provided in the incineration facility 80 .

(3) Sludge information acquisition unit 130
The sludge information acquisition unit 130 acquires sludge information including at least the sludge temperature, which is the temperature of the sludge dehydrated by the heating dehydrator 50 . For example, the sludge information acquisition unit 130 acquires the sludge temperature from the thermometer 52 as sludge information.
The sludge information acquisition unit 130 may acquire information other than the sludge temperature as the sludge information. For example, the sludge information acquisition unit 130, sludge mixing ratio, sludge supply amount, polymer flocculant chemical injection rate (previous stage or latter stage), polymer flocculant viscosity, and addition rate of flocculant (for example, ferric polysulfate) may be acquired as sludge information. The priority of the sludge information acquired by the sludge information acquisition unit 130 is, for example, sludge temperature = sludge mixing ratio > coagulant addition rate > polymer coagulant chemical injection rate (previous stage and latter stage) > polymer coagulant viscosity > sludge. order of supply.
The sludge mixing ratio acquired by the sludge information acquisition unit 130 is, for example, the mixing ratio of initial settling sludge, surplus sludge, digested sludge, etc. in the sludge supplied to the heating/dehydrating machine 50 .
The sludge supply amount acquired by the sludge information acquisition unit 130 is, for example, the amount of sludge supplied to the heating and drying machine 50 .
The polymer flocculant feeding rate acquired by the sludge information acquisition unit 130 is, for example, the addition rate of the polymer flocculant B supplied to the organic sludge A or the thickened sludge D from a polymer flocculant supply device (not shown). is. Here, the former stage of the polymer flocculant chemical feeding rate is, for example, the chemical feeding rate to organic sludge A, and the latter stage of the polymer flocculant chemical feeding rate is, for example, the chemical feeding rate to thickened sludge D. .
The polymer flocculant viscosity acquired by the sludge information acquisition unit 130 is, for example, the viscosity of the polymer flocculant B supplied to the organic sludge A or thickened sludge D from a polymer flocculant supply device (not shown).
The coagulant addition rate acquired by the sludge information acquisition unit 130 is, for example, the addition rate of the coagulant supplied to the thickened sludge D (ratio of the coagulant to the thickened sludge D).

(4) Storage unit 140
The storage unit 140 has a function of storing various information. The storage unit 140 includes storage media such as HDD (Hard Disk Drive), NAS (Network Attached Storage), SSD (Solid State Drive), flash memory, EEPROM (Electrically Erasable Programmable Read Only Memory), RAM (Random Access read/write). write memory), ROM (Read Only Memory), or any combination of these storage media.
As shown in FIG. 2, the storage unit 140 has a target shaft torque determination model 141. As shown in FIG.

(4-1) Target Shaft Torque Determination Model 141
The target shaft torque determination model 141 determines the target shaft torque in the rotary drive section 50c of the heating and dehydrating machine 50 based on the target moisture content of the dehydrated sludge and sludge information. The target shaft torque determination model 141 is, for example, a learned model obtained by machine-learning the relationship between the moisture content of the dewatered sludge and the sludge information and the shaft torque of the rotary drive unit 50c.
That is, the target shaft torque determination model 141 can output the shaft torque of the rotation driving section 50c as output data when the moisture content of dehydrated sludge and sludge information are input as input data.

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

Any machine learning method may be applied to the target shaft torque determination model 141 . Arbitrary machine learning techniques include, for example, linear regression, support vector machine regression, Gaussian process regression, decision trees, neural networks, and the like.
Note that the target shaft torque determination model 141 is not limited to a machine-learned model. For example, the target shaft torque determination model 141 may be a regression model, a regression equation, a classification model, or the like.

(5) Target value determination unit 150
The target value determination unit 150 selects the control target 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. A second target value for control is determined.
As shown in FIG. 2 , the target value determining section 150 includes only the target shaft torque determining section 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 determination model 141 is used to determine the target shaft torque. In the first embodiment, the target shaft torque determination unit 151 uses the target shaft torque determination model 141 that has undergone machine learning. Specifically, the target shaft torque determination unit 151 determines the shaft torque output by inputting the target moisture content and the sludge information as input data to the target shaft torque determination model 141 as the target shaft torque.

(6) Control unit 160
The control unit 160 controls the shaft torque (torque control) of the rotation driving unit 50c by controlling the control target according to the target shaft torque (second target value) determined by the target shaft torque determination unit 151. . For example, the control unit 160 determines operation parameters such that the shaft torque of the rotary 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 coagulant addition rate (an example of an operating parameter) according to the target shaft torque, and controls the coagulant supply pump 40 (an example of a control target).
Further, the control unit 160 performs feedback control based on the result of controlling the addition rate of the coagulant to be controlled according to the target shaft torque. For example, if the coagulant addition rate after control of the coagulant supply pump 40 is not the target addition rate (determined operating parameter), the control unit 160 causes the coagulant addition rate after control to reach the target addition rate. Control the flocculant supply pump 40 to approach.
The control unit 160 performs feedback control by, for example, PID (Proportional Integral Differential) control or model predictive control.

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

As shown in FIG. 3, the target shaft torque determination model 141 is input with the target moisture content and sludge information. The target moisture content is obtained by the target value obtaining unit 120 . The sludge information is obtained by the sludge information obtaining section 130 .
The target shaft torque determination model 141 outputs a target shaft torque for the rotary drive unit 50c of the heating and dehydrating machine 50 based on the input target water content of the dehydrated sludge and sludge information. The target shaft torque output from the target shaft torque determination model 141 is input to the control section 160 .
The control unit 160 controls the axial torque (torque control) of the rotation driving unit 50c by controlling, for example, the addition rate (operating parameter) of the coagulant according to the inputted target axial torque. Specifically, the controlled object in this case is the supply amount of the coagulant supplied from the coagulant supply pump 40 .
The control unit 160 acquires the post-control addition rate of the coagulant to be controlled, and performs feedback control.

<1-4. Control panel operation>
Input/output in the control panel 100 according to the first embodiment has been described above. Next, operation of the control panel 100 according to the first embodiment will be described with reference to FIG. FIG. 4 is a flow chart 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 acquiring unit 120 of the control panel 100 acquires the target moisture content (step S101). For example, the target value acquiring 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 including at least the sludge temperature measured by the thermo-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 uses the target shaft torque determination model 141 stored in the storage unit 140 of the control panel 100 to determine the target shaft torque. Specifically, the target shaft torque determining unit 151 uses the target water content obtained by the target value obtaining unit 120 and the sludge information obtained by the sludge information obtaining unit 130 as input data, and is output from the target shaft torque determination model 141. The shaft torque is determined as the target shaft torque.

Next, the control unit 160 of the control panel 100 performs controlled object control (step S104). For example, the control unit 160 controls the amount of coagulant supplied from the coagulant supply pump 40 according to the target shaft torque determined by the target shaft torque determination unit 151 .

Next, the controller 160 performs feedback control (step S105). For example, the control unit 160 acquires the addition amount of the flocculant 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. conduct.

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 acquiring unit 120 is determined according to the operating state of the incinerator 81 that incinerates the dewatered sludge dehydrated by the heating dehydrator 50 (sludge dehydrator), and is the first value related to the control of the heating dehydrator 50. Get the target value. 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 related to control of the controlled object, which is correlated with the first target value, from the relationship between the acquired first target value and the acquired sludge information. Control unit 160 controls the controlled object according to the determined second target value.

With such a configuration, the control panel 100 according to the first embodiment controls the operation of the heating dehydrator 50 according to the change in the sludge temperature of the sludge in the heating dehydrator 50. The moisture content of the discharged dewatered sludge can be kept constant.

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

Further, the control panel 100 according to the first embodiment includes a target shaft torque determination section 151 that determines the target shaft torque using the target shaft torque determination model 141 . Thereby, the control panel 100 can 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. FIG. In the second embodiment, an example will be described in which only the target operating parameter determination model is used to determine the second target value. It should be noted that, hereinafter, explanations that overlap with the explanations in the first embodiment will be omitted as appropriate.

<2-1. Configuration of heated dehydration system>
Since the configuration of the heated dehydration system according to the second embodiment is the same as the configuration of the heated dehydration system 1 according to the first embodiment, redundant description will be omitted.

<2-2. Functional configuration of the control panel>
The configuration of the thermal 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. 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 storage unit 140a, a target value determination unit 150a, a control unit 160a, and a controlled object priority determination unit 170. Prepare.

(1) Communication unit 110
Since the function of the communication unit 110 according to the second embodiment is the same as the function of the communication unit 110 according to the first embodiment, redundant description will be omitted.

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

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

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

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

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

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, in sludge dewatering machines in general, the target operating parameter determination model 142 is set to output the flocculant addition rate, the sludge supply amount, and the polymer flocculant chemical feeding rate. Also, when the sludge dehydrator is a metal filter medium dehydrator, the injection pressure and the back pressure closing rate are set so as to be output from the target operating parameter determination model 142 . Also, when 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 . Also, when the sludge dehydrator is a heating dehydrator, the heat medium temperature and the heat medium flow rate are set so as to be output from the target operating parameter determination model 142 .

Any machine learning technique may be applied to the target driving parameter determination model 142 . Arbitrary machine learning techniques include, for example, linear regression, support vector machine regression, Gaussian process regression, decision trees, neural networks, and the like.
Note that the target driving parameter determination model 142 is not limited to a machine-learned model. For example, the target driving parameter determination model 142 may be a regression model, a regression equation, a classification model, or the like.

(5) Target value determination unit 150a
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, the target value determination unit 150a selects a controlled object correlated with the first target value. A second target value for control is determined.
As shown in FIG. 5, the target value determination unit 150a includes only the target operating parameter determination unit 152. As shown in FIG.

(5-1) Target operating parameter determination unit 152
The target operating parameter determining unit 152 determines target operating parameters based on the relationship between the target shaft torque (first target value) acquired by the target value acquiring unit 120a and the sludge information acquired by the sludge information acquiring unit 130a. For example, the target operating parameter determination model 142 is used to determine target operating parameters. In the second embodiment, the target operating parameter determination unit 152 uses the target operating parameter determination model 142 that has undergone machine learning. Specifically, the target operating parameter determining unit 152 determines, as target operating parameters, the operating parameters that are input to the target operating parameter determination model 142 with the target shaft torque and the sludge information as input data and are output.

(6) Control unit 160a
The control unit 160a controls the shaft torque of the rotation driving unit 50c by controlling the controlled object according to the target operating parameter (second target value) determined by the target operating parameter determining unit 152.
For example, when the operating parameters include the addition rate of the coagulant, the control unit 160a controls the coagulant supply pump 40 (controlled object) to adjust the amount of coagulant supplied from the coagulant supply pump 40. to adjust the flocculant addition rate.
Moreover, when the press-fitting pressure is included in the operating parameters, the control unit 160a adjusts the press-fitting pressure by controlling the rotation speed of the ribbon screw 50d (controlled object).
When the operating parameter includes the back pressure closing rate, the control unit 160a controls the back pressure plate 50G (controlled object) to adjust the opening degree of the back pressure plate 50G to adjust the back pressure closing rate.
Moreover, when the differential speed is included in the operating parameters, the control unit 160a adjusts the differential speed by controlling the rotation speed of the screw conveyor (controlled object) in the centrifugal dehydrator.
Further, when centrifugal acceleration is included in the operating parameters, the control unit 160a adjusts the centrifugal acceleration by controlling the speed of the bowl (controlled object) in the centrifugal dehydrator.
Further, when the operation parameter includes the sludge supply amount, the control unit 160a controls the thickened sludge supply pump 30 (controlled object) to adjust the amount of the thickened sludge D supplied from the thickened sludge supply pump 30. to adjust the amount of sludge supplied.
Further, when the heating medium temperature is included in the operating parameters, the control unit 160a controls the amount of heating medium supplied to the boiler 82 from, for example, a heating medium supply facility (not shown, controlled object), thereby increasing the heating medium temperature. adjust.
Further, when the heating medium flow rate is included in the operating parameters, the control unit 160a controls the heating medium supply pump 60 to adjust the amount of the heating medium (hot water H) supplied from the heating medium supply pump 60. Adjust the heat medium flow rate.
In addition, when the operating parameter includes the polymer flocculant chemical feeding rate, the control unit 160a controls the polymer flocculant supply pump (not shown, controlled object) so that the organic sludge A or the thickened sludge D The amount of polymer flocculant B to be supplied is adjusted to adjust the polymer flocculant dosing rate.

Further, the control unit 160a performs feedback control based on the result of controlling the controlled object according to the target operating parameter. As an example, if the controlled flocculant addition rate of the flocculant supply pump 40 is not the target operating parameter, the control unit 160a controls the flocculation so that the controlled flocculant addition rate approaches the target operating parameter. control the agent supply pump 40; Feedback control for other controlled objects is the same.

(7) Controlled object priority determining unit 170
When there are a plurality of determined target operating parameters, the controlled object priority determining unit 170 determines the priority of controlling the controlled object corresponding to each target operating parameter.

Here, with reference to FIG. 6, the priority of the control target will be described. FIG. 6 is a diagram illustrating an example of control of the priority of controlled objects according to the second embodiment. The vertical axis of the graph shown in FIG. 6 indicates the control output of each controlled object, and the horizontal axis indicates the control output of the control unit. FIG. 6 shows an example in which the heating dehydrator 50 is a metal filter medium type dehydrator, and the operation parameters are the flocculant addition rate, the injection pressure, and the back pressure closing rate.

As shown in FIG. 6, the priority of the control output (that is, the priority of the controlled object) is set to the injection pressure, the back pressure closing rate, and the addition rate of the coagulant in descending order of priority.
Priority is set in consideration of cost and controllability. When the cost is taken into consideration, a control output with a high cost is set with a low priority, and a control output with a low cost is set with a high priority. For example, in the case of the flocculant addition rate shown in FIG. 6, it is necessary to add the flocculant in order to increase the flocculant addition rate, but the flocculant costs are high, so the priority is set low. When considering controllability, a high priority is set for a control output with high controllability, and a low priority is set for a control output with low controllability. For example, a control output with high reproducibility of the relationship between a change in the controlled variable and a change in the torque of the controlled object or a control output with a quick response is evaluated as having high controllability.
The timing of starting and ending the operation of the control output of each controlled object and the slope, 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 output by the target operating parameter determination model 142, which is suitable for the input target shaft torque. An error due to the accuracy of the target driving parameter determination model 142 is adjusted by torque control (feedback control) by the control unit 160a.
By using the target operating parameter determination model 142, the target operating parameter determining unit 152 can instantaneously output the optimum control amount based on the past operating data and the operator's know-how.
If the control variables are manually manipulated separately before the automatic control by the control panel 100a, it is possible to switch to standard operation by starting the automatic control by the control panel 100a. Note that the control shown in FIG. 6 may be conditionally branched like an IF/THEN rule.

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

As shown in FIG. 7, the target shaft torque and sludge information are input to the target operating parameter determination model 142 . The target shaft torque is obtained by the target value obtaining section 120a. The sludge information is obtained by the sludge information obtaining section 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 controlled object priority determination unit 170 .
The controlled object priority determination unit 170 inputs the target operating parameter to the control unit 160a according to the controlled object priority.
The control unit 160a controls the controlled object according to the inputted target operating parameter. In addition, the control unit 160a acquires the measured value of the operating parameter measured in each controlled object after each control, and performs feedback control so that the measured value approaches the target operating parameter.

<2-4. Control panel operation>
The input/output in the control panel 100a according to the second embodiment has been described above. Next, operation of the control panel 100a according to the second embodiment will be described with reference to FIG. FIG. 8 is a flow chart 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. FIG.

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 including at least the sludge temperature measured by the thermo-thermometer 52. FIG.

Next, the target operating parameter determining unit 152 of the control panel 100a determines target operating parameters (step S203). For example, the target operating parameter determining unit 152 uses the target operating parameter determination model 142 stored in the storage unit 140a of the control panel 100 to determine target operating parameters. Specifically, the target operating parameter determining unit 152 outputs the target shaft torque acquired by the target value acquiring unit 120a and the sludge information acquired by the sludge information acquiring unit 130a as input data from the target operating parameter determining model 142. The operating parameters are determined as target operating parameters.

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

Next, the control unit 160a of the control panel 100a controls the control target (step S205). For example, the control unit 160 a controls each controlled object according to the target operating parameter determined by the target operating parameter determining unit 152 according to the priority determined by the controlled object priority determining unit 170 .

Next, the controller 160a performs feedback control (step S206). For example, the control unit 160a acquires a measured value measured in each controlled object after each control, and performs feedback control so that the measured value approaches the target operating parameter.

As described above, the control panel 100a (control device) according to the second embodiment includes the target value acquisition section 120a, the sludge information acquisition section 130a, the target value determination section 150a, and the control section 160a.
The target value acquisition unit 120a determines the first value related to the control of the heating dehydrator 50 (sludge dehydrator), which is determined according to the operating state of the incinerator 81 that incinerates the dewatered sludge dehydrated by the heating dehydrator 50 (sludge dehydrator). Get the target value. 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 determining unit 150a determines a second target value related to control of the controlled object, which is correlated with the first target value, from the relationship between the acquired first target value and the acquired sludge information. Control unit 160a controls the controlled object according to the determined second target value.

With such a configuration, the control panel 100a according to the second embodiment controls the operation of the heating dehydrator 50 according to the change in the sludge temperature of the sludge in the heating dehydrator 50. The moisture content of the discharged dewatered sludge can be kept constant.

Therefore, the control panel 100a according to the second embodiment enables the dehydrator to be operated with 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 determining unit 152 that determines target operating parameters using the target operating parameter determination model 142. FIG. As a result, the control panel 100a can shorten the time until the shaft torque reaches 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. FIG. In the third embodiment, an example in which the target shaft torque determination model 141 and the target driving parameter determination model 142 are used to determine the second target value will be described. It should be noted that, hereinafter, explanations that overlap with the explanations in the first and second embodiments will be omitted as appropriate.

<3-1. Configuration of heated dehydration system>
Since the configuration of the heated dehydration system according to the third embodiment is the same as the configuration of the heated dehydration system 1 according to the first embodiment, redundant description will be omitted.

<3-2. Functional configuration of the control panel>
The configuration of the thermal dehydration system according to the third embodiment has been described above. Next, with reference to FIG. 9, the functional configuration of the control panel 100b according to the third embodiment will be described. 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 storage unit 140b, a target value determination unit 150b, a control unit 160b, and a controlled object priority determination unit 170. Prepare.

(1) Communication unit 110
Since the function of the communication unit 110 according to the third embodiment is the same as the function of the communication unit 110 according to the first embodiment, redundant description will be omitted.

(2) Target value acquisition unit 120
Since the function of the target value acquisition unit 120 according to the third embodiment is the same as the function of the target value acquisition unit 120 according to the first embodiment, redundant 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. Therefore, overlapping explanations are omitted.

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

(4-1) Target Shaft Torque Determination Model 141
The functions of the target shaft torque determination model 141 according to the third embodiment are the same as the functions of the target shaft torque determination model 141 according to the first embodiment, so overlapping descriptions will be omitted.

(4-2) Target operating parameter determination model 142
Since the functions of the target driving parameter determination model 142 according to the third embodiment are the same as those of the target driving parameter determination model 142 according to the second embodiment, overlapping descriptions will be omitted.
Note that the target driving parameter determination model 142 according to the third embodiment does not use the target shaft torque acquired by the target value acquisition unit 120 as input data. The target driving parameter determination model 142 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.

(5) Target value determination unit 150b
The target value determination unit 150b selects a controlled object 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. A second target value for control is determined.
As shown in FIG. 9 , the target value determining section 150 b includes a target shaft torque determining section 151 and a target operating parameter determining section 152 .

(5-1) Target Shaft Torque Determination Unit 151
Since the function of the target shaft torque determining section 151 according to the third embodiment is the same as the function of the target shaft torque determining section 151 according to the first embodiment, redundant description will be omitted.

(5-2) Target operating parameter determination unit 152
Since the function of the target operating parameter determining unit 152 according to the third embodiment is the same as the function of the target operating parameter determining unit 152 according to the second embodiment, redundant description will be omitted.
Note that the target driving 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 driving parameter determination model 142 . The target driving parameter determination unit 152 according to the third embodiment inputs 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 into the target driving parameter determination model 142. used as data.

(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. Therefore, overlapping explanations are omitted.

(7) Controlled object priority determining unit 170
The function of the controlled object priority determining unit 170 according to the third embodiment is the same as the function of the controlled object priority determining unit 170 according to the second embodiment, so redundant description will be omitted.

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

As shown in FIG. 10, the target shaft torque determination model 141 is input with the target moisture content and sludge information. The target moisture content is obtained by the target value obtaining unit 120 . The sludge information is obtained by the sludge information obtaining section 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. FIG. The sludge information is obtained by the sludge information obtaining section 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 controlled object priority determination unit 170 .
The controlled object priority determining unit 170 inputs the target operating parameter to the control unit 160b according to the controlled object priority.
The control unit 160b controls the controlled object according to the input target operating parameters. In addition, the control unit 160b acquires the measured value of the operating parameter measured in each controlled object after each control, and performs feedback control so that the measured value approaches the target operating parameter.

<3-4. Control panel operation>
The input/output in the control panel 100b according to the third embodiment has been described above. Next, operation of the control panel 100b according to the third embodiment will be described with reference to FIG. FIG. 11 is a flow chart 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 acquiring unit 120 of the control panel 100b acquires the target moisture content (step S301). For example, the target value acquiring 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 including at least the sludge temperature measured by the thermo-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 storage unit 140b of the control panel 100b. Specifically, the target shaft torque determination unit 151 uses the target water content obtained by the target value obtaining unit 120 and the sludge information obtained by the sludge information obtaining unit 130b as input data, and is output from the target shaft torque determination model 141. The shaft torque is determined as the target shaft torque.

Next, the target operating parameter determining unit 152 of the control panel 100b determines target operating parameters (step S304). For example, the target operating parameter determining unit 152 determines target operating parameters using the target operating parameter determination model 142 stored in the storage unit 140b of the control panel 100b. Specifically, the target driving parameter determination unit 152 outputs 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 from the target driving parameter determination model 142. determined to be target operating parameters.

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

Next, the control unit 160b of the control panel 100b controls the control target (step S306). For example, the control unit 160b controls each controlled object according to the target operating parameter determined by the target operating parameter determining unit 152 according to the priority determined by the controlled object priority determining unit 170.

Next, the controller 160b performs feedback control (step S307). For example, the control unit 160b acquires a measured value measured in each controlled object after each control, and performs feedback control so that the measured value approaches the target operating parameter.

As described above, the control panel 100b (control device) according to the third embodiment includes the target value acquisition section 120, the sludge information acquisition section 130b, the target value determination section 150b, and the control section 160b.
The target value acquiring unit 120 is determined according to the operating state of the incinerator 81 that incinerates the dewatered sludge dehydrated by the heating dehydrator 50 (sludge dehydrator), and is the first value related to the control of the heating dehydrator 50. Get the target value. 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 related to control of the controlled object, which is correlated with the first target value, from the relationship between the acquired first target value and the acquired sludge information. Control unit 160b controls the controlled object according to the determined second target value.

With such a configuration, the control panel 100b according to the third embodiment controls the operation of the heating dehydrator 50 according to the change in the sludge temperature of the sludge in the heating dehydrator 50. The moisture content of the discharged dewatered sludge can be kept constant.

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

In addition, the control panel 100b according to the third embodiment uses the target shaft torque determination unit 151 that determines the target shaft torque using the target shaft torque determination model 141 and the target driving parameter determination model 142 to determine the target driving parameters. A target operating parameter determination unit 152 is provided. As a result, the control panel 100b controls not only the shaft torque but also the operating parameters, as compared with the control panel 100 according to the first embodiment and the control panel 100a according to the second embodiment. The moisture content of the dehydrated sludge discharged from the hot dehydrator 50 can be controlled with higher accuracy.

<<4. Fourth Embodiment>>
The third embodiment has been described above. Next, a fourth embodiment will be described with reference to FIGS. 12 to 14. FIG. In the fourth embodiment, when only the target shaft torque determination model 141 is used to determine the second target value, the operation of the controlled object is determined based on the result of controlling the shaft torque by adjusting the operating parameter of the controlled object. An example of readjusting parameters will be described. In the following description, explanations overlapping with the explanations in the first to third embodiments will be omitted as appropriate.

<4-1. Configuration of heated dehydration system>
Since the configuration of the heated dehydration system according to the fourth embodiment is the same as the configuration of the heated dehydration system 1 according to the first embodiment, redundant description will be omitted.

<4-2. Functional configuration of the control panel>
The configuration of the thermal dehydration system according to the fourth embodiment has been described above. Next, with reference to FIG. 12, the functional configuration of the control panel 100c according to the fourth embodiment will be described. 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 storage unit 140, a target value determination unit 150, a control unit 160c, and a controlled object priority determination unit 170. Prepare.

(1) Communication unit 110
Since the function of the communication unit 110 according to the fourth embodiment is the same as the function of the communication unit 110 according to the first embodiment, redundant description will be omitted.

(2) Target value acquisition unit 120
Since the function of the target value acquisition unit 120 according to the fourth embodiment is the same as the function of the target value acquisition unit 120 according to the first embodiment, redundant description will be omitted.

(3) Sludge information acquisition unit 130
Since the function of the sludge information acquisition unit 130 according to the fourth embodiment is the same as the function of the sludge information acquisition unit 130 according to the first embodiment, redundant description will be omitted.

(4) Storage unit 140
Since the function of the storage unit 140 according to the fourth embodiment is the same as the function of the storage unit 140 according to the first embodiment, redundant 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. As shown in FIG.

(4-1) Target Shaft Torque Determination Model 141
The functions of the target shaft torque determination model 141 according to the fourth embodiment are the same as the functions of the target shaft torque determination model 141 according to the first embodiment, so overlapping descriptions will be omitted.

(5) Target value determination unit 150
Since the function of the target value determination unit 150 according to the fourth embodiment is the same as the function of the target value determination unit 150 according to the first embodiment, redundant description will be omitted.
As shown in FIG. 12 , the target value determining section 150 according to the fourth embodiment includes a target shaft torque determining section 151. As shown in FIG.

(5-1) Target Shaft Torque Determination Unit 151
Since the function of the target shaft torque determining section 151 according to the fourth embodiment is the same as the function of the target shaft torque determining section 151 according to the first embodiment, redundant description will be omitted.

(6) Control unit 160c
The control unit 160c has the same functions as those of the control units in the first to third embodiments, so redundant description will be omitted.

The control unit 160c readjusts the operating parameters to be controlled based on the results of control so that the shaft torque of the rotary drive unit 50c becomes the determined target shaft torque by adjusting the operating parameters to be controlled. It further has a function of performing feedback control of That is, when the shaft torque does not reach the target shaft torque by the torque control based on the target shaft torque, the control unit 160c brings the shaft torque closer to the target shaft torque by adjusting the operating parameters by the feedback control of the torque control. control. Thereby, the control unit 160c can shorten the time until the shaft torque reaches the target shaft torque.
The control unit 160c performs feedback control by PID control or model predictive control, for example.
The operating parameters controlled by the feedback control of the control unit 160c are, for example, the addition rate of the coagulant, the injection pressure, the back pressure closing rate, the differential speed, the centrifugal acceleration, the sludge supply amount, the heat medium temperature, the heat medium flow rate, the polymer Such as flocculant dosage rate.

(7) Controlled object priority determining unit 170
The function of the controlled object priority determining unit 170 according to the fourth embodiment is the same as the function of the controlled object priority determining unit 170 according to the second embodiment, so redundant description will be omitted.
Note that the controlled object priority determination unit 170 according to the fourth embodiment determines the priority of the controlled object based on the target operating parameter determined by the control unit 160c.

<4-3. Input/output in the control panel>
The functional configuration of the control panel 100c according to the fourth embodiment has been described above. Next, input/output in the control panel 100c according to the fourth embodiment will be described with reference to FIG. FIG. 13 is a diagram showing an example of input/output in the control panel 100c according to the fourth embodiment. FIG. 13 shows an example in which the heating dehydrator 50 is a metal filter medium type dehydrator, and the operation parameters are the flocculant addition rate, the injection pressure, and the back pressure closing rate.

As shown in FIG. 13, the target shaft torque determination model 141 is input with the target moisture content and sludge information. The target moisture content is obtained by the target value obtaining unit 120 . The sludge information is obtained by the sludge information obtaining section 130 .
The target shaft torque determination model 141 outputs a target shaft torque for the rotary drive unit 50c of the heating and dehydrating machine 50 based on the input target water content of the dehydrated sludge and sludge information. The target shaft torque output from the target shaft torque determination model 141 is input to the control section 160c.
The control unit 160c outputs a target driving parameter 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 160 c are input to the controlled object priority determination unit 170 .
The controlled object priority determination unit 170 inputs the target operating parameter to the control unit 160c according to the controlled object priority.
The control unit 160c performs torque control by controlling the control target according to the inputted target operating parameter. The control unit 160c acquires the measured value of the post-control shaft torque of the controlled object, and performs feedback control.

<4-4. Control panel operation>
Input/output in the control panel 100c according to the fourth embodiment has been described above. Next, operation of the control panel 100c according to the fourth embodiment will be described with reference to FIG. FIG. 14 is a flow chart showing an example of the operation of the control panel 100c according to the fourth embodiment.

Since the processing from step S401 to step S403 shown in FIG. 14 is the same as the processing from step S101 to step S103 described with reference to FIG. 4, 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 target operating parameters based on the target shaft torque.

Next, the controlled object priority determination unit 170 of the control panel 100c determines the priority of controlling the controlled object 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 target (step S406). For example, the control unit 160c controls each controlled object according to the target operating parameter determined by the control unit 160c according to the priority determined by the controlled object priority determining unit 170. FIG.

Next, the controller 160c performs feedback control (step S407). For example, the control unit 160b acquires measured values measured in each controlled 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 section 120, the sludge information acquisition section 130, the target value determination section 150, and the control section 160c.
The target value acquiring unit 120 is determined according to the operating state of the incinerator 81 that incinerates the dewatered sludge dehydrated by the heating dehydrator 50 (sludge dehydrator), and is the first value related to the control of the heating dehydrator 50. Get the target value. 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 related to control of the controlled object, which is correlated with the first target value, from the relationship between the acquired first target value and the acquired sludge information. Control unit 160c controls the controlled object according to the determined second target value.

With such a configuration, the control panel 100c according to the fourth embodiment controls the operation of the heating dehydrator 50 according to the change in the sludge temperature of the sludge in the heating dehydrator 50. The moisture content of the discharged dewatered sludge can be kept constant.

Therefore, the control panel 100c according to the fourth embodiment makes it possible to operate the dehydrator with a stable moisture content even when the sludge temperature changes.

Further, 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 required 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 the 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. FIG. In the fifth embodiment, when only the target operating parameter determination model 142 is used to determine the second target value, the operation of the controlled object is determined based on the result of controlling the shaft torque by adjusting the operating parameter of the controlled object. An example of readjusting (correcting) parameters will be described. In the following, explanations overlapping with those in the first to fourth embodiments will be omitted as appropriate.

<5-1. Configuration of heated dehydration system>
Since the configuration of the heated dehydration system according to the fifth embodiment is the same as the configuration of the heated dehydration system 1 according to the first embodiment, redundant description will be omitted.

<5-2. Functional configuration of the control panel>
The configuration of the thermal dehydration system according to the fifth embodiment has been described above. Next, with reference to FIG. 15, the functional configuration of the control panel 100d according to the fifth embodiment will be described. FIG. 15 is a block diagram showing an example of the functional configuration of a 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 storage unit 140d, a target value determination unit 150d, a control unit 160d, and a controlled object priority determination unit 170. Prepare.

(1) Communication unit 110
Since the function of the communication unit 110 according to the fifth embodiment is the same as the function of the communication unit 110 according to the first embodiment, redundant description will be omitted.

(2) Target value acquisition unit 120d
Since the function of the target value acquisition unit 120d according to the fifth embodiment is the same as the function of the target value acquisition unit 120a according to the second embodiment, redundant description will be omitted.

(3) Sludge information acquisition unit 130
Since the function of the sludge information acquisition unit 130 according to the fifth embodiment is the same as the function of the sludge information acquisition unit 130 according to the first embodiment, redundant description will be omitted.

(4) Storage unit 140d
Since the function of the storage unit 140d according to the fifth embodiment is the same as the function of the storage unit 140 according to the first embodiment, redundant description will be omitted.
As shown in FIG. 15, a storage unit 140d according to the fifth embodiment has a target driving parameter determination model 142. As shown in FIG.

(4-1) Target operating parameter determination model 142
Since the functions of the target driving parameter determination model 142 according to the fifth embodiment are the same as those of the target driving parameter determination model 142 according to the second embodiment, overlapping descriptions will be omitted.

(5) Target value determination unit 150d
Since the function of the target value determination unit 150d according to the fifth embodiment is the same as the function of the target value determination unit 150a according to the second embodiment, redundant description will be omitted.
As shown in FIG. 15 , the target value determining section 150d according to the fifth embodiment includes a target operating parameter determining section 152. FIG.

(5-1) Target operating parameter determination unit 152
Since the function of the target operating parameter determining unit 152 according to the fifth embodiment is the same as the function of the target operating parameter determining unit 152 according to the second embodiment, redundant description will be omitted.

(6) Control section 160d
The control unit 160d has functions similar to those of the respective control units in the first to fourth embodiments, so redundant description will be omitted.
The control unit 160d further has a function of performing feedback control for adjusting (correcting) the target operating parameter determined by the target operating parameter determination model 142 based on the control result of the controlled object according to the target shaft torque. That is, when the torque control based on the target shaft torque does not achieve the target shaft torque, the control unit 160d adjusts the operating parameters by the feedback control of the torque control to bring the shaft torque closer to the target shaft torque. control. As a result, the control unit 160d can shorten the time until the shaft torque reaches the target shaft torque.
The control unit 160d performs feedback control by PID control or model predictive control, for example.
The operating parameters controlled by the feedback control of the control unit 160d are, for example, the addition rate of the coagulant, the injection pressure, the back pressure closing rate, the differential speed, the centrifugal acceleration, the sludge supply amount, the heat medium temperature, the heat medium flow rate, the polymer Such as flocculant dosage rate.

(7) Controlled object priority determining unit 170
The function of the controlled object priority determining unit 170 according to the fifth embodiment is the same as the function of the controlled object priority determining unit 170 according to the second embodiment, so redundant description will be omitted.
Note that the controlled object priority determination unit 170 according to the fifth embodiment determines the controlled object based on the target operating parameters after the target operating parameters determined by the target operating parameter determination model 142 are corrected by the control unit 160d. Determine your priorities.

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

As shown in FIG. 16, the control unit 160d controls the torque to be controlled (torque control) according to the inputted target shaft torque.
The target shaft torque and sludge information are input to the target operating parameter determination model 142 . The target shaft torque is obtained by the target value obtaining section 120d. The sludge information is obtained by the sludge information obtaining section 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 post-control shaft torque of the controlled object, and performs feedback control. The control unit 160d acquires correction values for correcting the target operating parameters determined by the target operating parameter determination model 142 through the feedback control. The control unit 160 d inputs the target operating parameters corrected with the acquired correction values to the controlled object priority determining unit 170 .
The controlled object priority determination unit 170 inputs the target operating parameter to the control unit 160d according to the controlled object priority.
The control unit 160d controls the controlled object according to the input target shaft torque and target operating parameters. The control unit 160d acquires the measured value of the post-control shaft torque of the controlled object, and performs feedback control.

<5-4. Control panel operation>
The input/output in the control panel 100d according to the fifth embodiment has been described above. Next, operation of the control panel 100d according to the fifth embodiment will be described with reference to FIG. FIG. 17 is a flow chart showing an example of the operation of the control panel 100d according to the fifth embodiment.

Since the processing from step S501 to step S503 shown in FIG. 17 is the same as the processing from step S201 to step S203 described with reference to FIG. 8, redundant description will be omitted.

Since the processing from step S504 to step S506 shown in FIG. 17 is the same as the processing from step S405 to step S407 described with reference to FIG. 14, redundant description will be omitted.

Next, the control unit 160d corrects the target operating parameters (step S507). For example, the control unit 160d acquires correction values for target operating parameters determined by the target operating parameter determination model 142 through feedback control. The control unit 160d corrects the target operating parameter with the acquired correction value. Then, the control unit 160 d inputs the corrected target operating parameter to the controlled object priority determining unit 170 .

As described above, the control panel 100d (control device) according to the fifth embodiment includes the target value acquisition section 120d, the sludge information acquisition section 130, the target value determination section 150d, and the control section 160d.
The target value acquiring unit 120d determines the first value related to the control of the heating dehydrator 50 (sludge dehydrator), which is determined according to the operating state of the incinerator 81 that incinerates the dewatered sludge dehydrated by the heating dehydrator 50 (sludge dehydrator). Get the target value. 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 related to control of the controlled object, which is correlated with the first target value, from the relationship between the acquired first target value and the acquired sludge information. Control unit 160d controls the controlled object according to the determined second target value.

With such a configuration, the control panel 100d according to the fifth embodiment controls the operation of the heating dehydrator 50 according to the change in the sludge temperature of the sludge in the heating dehydrator 50. The moisture content of the discharged dewatered sludge can be kept constant.

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

Further, 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 result of feedback control of torque control. As a result, the control panel 100d can reduce the time required for the shaft torque to reach the target shaft torque through torque control, and can 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. FIG. In the sixth embodiment, when the target shaft torque determination model 141 and the target driving parameter determination model 142 are used to determine the second target value, the shaft torque is controlled by adjusting the driving parameter to be controlled. Based on this, an example of readjusting (correcting) the operating parameters to be controlled will be described. In the following, explanations overlapping with those in the first to fifth embodiments will be omitted as appropriate.

<6-1. Configuration of heated dehydration system>
Since the configuration of the heated dehydration system according to the sixth embodiment is the same as the configuration of the heated dehydration system 1 according to the first embodiment, redundant description will be omitted.

<6-2. Functional configuration of the control panel>
The configuration of the thermal dehydration system according to the sixth embodiment has been described above. Next, with reference to FIG. 18, the functional configuration of the control panel 100e according to the sixth embodiment will be described. FIG. 18 is a block diagram showing an example of the functional configuration of a 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 storage unit 140e, a target value determination unit 150e, a control unit 160e, and a controlled object priority determination unit 170. Prepare.

(1) Communication unit 110
Since the function of the communication unit 110 according to the sixth embodiment is the same as the function of the communication unit 110 according to the first embodiment, redundant description will be omitted.

(2) Target value acquisition unit 120
Since the function of the target value acquisition unit 120 according to the sixth embodiment is the same as the function of the target value acquisition unit 120 according to the first embodiment, redundant description will be omitted.

(3) Sludge information acquisition unit 130e
Since the function of the sludge information acquisition unit 130e according to the sixth embodiment is the same as the function of the sludge information acquisition unit 130b according to the third embodiment, redundant description will be omitted.

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

(4-1) Target Shaft Torque Determination Model 141
The functions of the target shaft torque determination model 141 according to the sixth embodiment are the same as the functions of the target shaft torque determination model 141 according to the third embodiment, so overlapping descriptions will be omitted.

(4-2) Target operating parameter determination model 142
The functions of the target driving parameter determination model 142 according to the sixth embodiment are the same as those of the target driving parameter determination model 142 according to the third embodiment, and redundant description will be omitted.

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

(5-1) Target Shaft Torque Determination Unit 151
Since the function of the target shaft torque determining section 151 according to the sixth embodiment is the same as the function of the target shaft torque determining section 151 according to the third embodiment, redundant description will be omitted.

(5-2) Target operating parameter determination unit 152
Since the function of the target operating parameter determining unit 152 according to the sixth embodiment is the same as the function of the target operating parameter determining unit 152 according to the third embodiment, redundant description will be omitted.

(6) Control unit 160e
The control unit 160e has functions similar to those of the respective control units in the first to fifth embodiments, so redundant description will be omitted.
The control unit 160e further has a function of performing feedback control for adjusting (correcting) the target operating parameter determined by the target operating parameter determination model 142 based on the control result of the controlled object according to the target shaft torque. That is, when the torque control based on the target shaft torque fails to achieve the target shaft torque, the control unit 160e adjusts the operating parameters by the feedback control of the torque control to bring the shaft torque closer to the target shaft torque. control. As a result, the control unit 160e can shorten the time until the shaft torque reaches the target shaft torque.
The control unit 160e performs feedback control by PID control or model predictive control, for example.
The operating parameters controlled by the feedback control of the control unit 160e are, for example, the addition rate of the coagulant, the injection pressure, the back pressure closing rate, the differential speed, the centrifugal acceleration, the sludge supply amount, the heat medium temperature, the heat medium flow rate, the polymer Such as flocculant dosage rate.

(7) Controlled object priority determining unit 170
The function of the controlled object priority determining unit 170 according to the sixth embodiment is the same as the function of the controlled object priority determining unit 170 according to the second embodiment, so redundant description will be omitted.
Note that the controlled object priority determination unit 170 according to the sixth embodiment determines the controlled object based on the target operating parameters after the target operating parameters determined by the target operating parameter determination model 142 are corrected by the control unit 160e. Determine your priorities.

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

As shown in FIG. 19, the target shaft torque determination model 141 is input with the target moisture content and sludge information. The target moisture content is obtained by the target value obtaining unit 120 . The sludge information is obtained by the sludge information obtaining section 130e. The target shaft torque determination model 141 outputs the target shaft torque from the input target moisture content and sludge information. The target shaft torque is input to the control unit 160 e and the target operating parameter determination model 142 .
The control unit 160e controls the torque to be controlled (torque control) according to the inputted target shaft 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. FIG. The sludge information is obtained by the sludge information obtaining section 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 post-control shaft torque of the controlled object, and performs feedback control. The control unit 160e acquires correction values for correcting the target operating parameters determined by the target operating parameter determination model 142 through the feedback control. The control unit 160 e inputs the target operating parameters corrected with the acquired correction values to the controlled object priority determining unit 170 .
The controlled object priority determining unit 170 inputs the target operating parameter to the control unit 160e according to the controlled object priority.
The control unit 160e controls the controlled object according to the input target shaft torque and target operating parameters. The control unit 160e acquires the measured value of the post-control shaft torque of the controlled object, and performs feedback control.

<6-4. Control panel operation>
The input/output in the control panel 100e according to the sixth embodiment has been described above. Next, operation of the control panel 100e according to the sixth embodiment will be described with reference to FIG. FIG. 20 is a flow chart showing an example of the operation of the control panel 100e according to the sixth embodiment.

Since 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, redundant description will be omitted.
Since 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, redundant description will be omitted.

As described above, the control panel 100e (control device) according to the sixth embodiment includes the target value acquisition section 120, the sludge information acquisition section 130e, the target value determination section 150e, and the control section 160e.
The target value acquiring unit 120 is determined according to the operating state of the incinerator 81 that incinerates the dewatered sludge dehydrated by the heating dehydrator 50 (sludge dehydrator), and is the first value related to the control of the heating dehydrator 50. Get the target value. 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 related to control of the controlled object, which is correlated with the first target value, from the relationship between the acquired first target value and the acquired sludge information. Control unit 160e controls the controlled object according to the determined second target value.

With such a configuration, the control panel 100e according to the sixth embodiment controls the operation of the heating dehydrator 50 according to the change in the sludge temperature of the sludge in the heating dehydrator 50. The moisture content of the discharged dewatered sludge can be kept constant.

Therefore, the control panel 100e according to the sixth embodiment makes it possible to operate the dehydrator with a stable moisture content even when the sludge temperature changes.

Further, the control unit 160d of the control panel 100e according to the sixth embodiment feeds back the target driving parameters determined by the target driving parameter determining model 142 based on the target shaft torque determined by the target shaft torque determining model 141. Compensate based on control results. As a result, the control panel 100e can reduce the time required for the shaft torque to reach the target shaft torque through torque control, and can perform torque control with higher accuracy.

The embodiments of the present invention have been described above. Part or all of the control panel 100 and 100a to 100e (control devices) in the above-described embodiments may be realized by a computer. In that case, a program for realizing this function may be recorded in a computer-readable recording medium, and the program recorded in this recording medium may be read into a computer system and executed. It should be noted that the "computer system" referred to here includes hardware such as an OS and peripheral devices. The term "computer-readable recording medium" refers to portable media such as flexible discs, magneto-optical discs, ROMs and CD-ROMs, and storage devices such as hard discs incorporated in computer systems. Furthermore, "computer-readable recording medium" means a medium that dynamically retains a program for a short period of time, like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. It may also include something that holds the program for a certain period of time, such as a volatile memory inside a computer system that serves as a server or client in that case. Further, the program may be for realizing a part of the functions described above, or may be capable of realizing the functions described above in combination with a program already recorded in the computer system. It may be implemented using a programmable logic device such as an FPGA (Field Programmable Gate Array).

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configurations are not limited to those described above, and various design changes can be made without departing from the gist of the present invention. It is possible to

DESCRIPTION OF SYMBOLS 1... Thermal dehydration system, 10... Aggregator, 20... Concentrator, 30... Thickened sludge supply pump, 40... Flocculant supply pump, 45... Flocculant flow meter, 48... Injection pressure sensor, 50... Thermal dehydrator , 50A... casing, 50A1... first space, 50A2... second space, 50A3... third space, 50A4... heating section, 50B... filter screen, 50Ba... inner filter screen, 50Bb... outer filter screen, 50c 50C: substrate 50d: ribbon screw 50D: cover body 50e: connection plate 50E: discharge chamber 50f: supply pipe 50F: discharge port 50G: back pressure plate 50Gs: back pressure sensor 50H... Drain pipe, 51... Torque sensor, 52... Thermo thermometer, 55... Dehydrated sludge hopper, 60... Heat medium supply pump, 65... Heat medium flow meter, 70... Dehydrated 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, 140a, 140b, 140d, 140e... Storage unit 141... Target shaft torque determination model 142... Target operating parameter determination model 150, 150a, 150b, 150d, 150e... Target value determination Section 151 Target shaft torque determination section 152 Target operating parameter determination section 160, 160a to 160e Control section 170 Controlled object priority determination section

Claims (19)

a target value acquisition unit that acquires a first target value related to control of the sludge dehydrator, which is determined according to the operating state of an incinerator that incinerates dewatered sludge dehydrated by the sludge dehydrator;
a sludge information acquisition unit that acquires sludge information including at least a sludge temperature that is the temperature of the dehydrated sludge;
A target value determination unit that determines a second target value related to control of a controlled object that is correlated with the first target value from the relationship between the acquired first target value and the acquired sludge information;
a control unit that controls the controlled object according to the determined second target value;
A control device comprising: The target value determination unit uses the target moisture content of the dewatered sludge as the first target value, and sets the target shaft torque, which is a target value of the shaft torque in the rotary drive unit of the sludge dewatering machine, as the second target value. A target shaft torque determination unit determined as a value or a target shaft torque in a rotation drive unit of the sludge dehydrator is used as the first target value, and the target value of the operating parameter of the sludge dehydrator other than the shaft torque is at least one of a target operating parameter determining unit that determines a certain target operating parameter as the second target value;
A control device according to claim 1 . The target value determination unit includes only the target shaft torque determination unit,
The target value acquiring unit acquires the target moisture content,
The target shaft torque determination unit determines the target shaft torque from the relationship between the acquired target moisture content and the acquired sludge information.
3. A control device according to claim 2. The control unit performs feedback control for adjusting the operating parameters of the sludge dehydrator based on the result of controlling the shaft torque of the rotary drive unit so that it becomes the determined target shaft torque.
4. A control device according to claim 3. The control unit adjusts the addition rate of the flocculant injected into the sludge dehydrated by the sludge dehydrator as the operating parameter,
5. A control device according to claim 4. The control unit performs the feedback control by model predictive control.
The control device according to claim 4 or 5. 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 determining unit determines the target operating parameter from the relationship between the acquired target shaft torque and the acquired sludge information.
3. A control device according to claim 2. The control unit performs feedback control for adjusting the determined target operating parameter based on a control result of the controlled object according to the acquired target shaft torque.
A control device according to claim 7 . The target value determination unit includes the target shaft torque determination unit and the target operating parameter determination unit,
The target value acquiring unit acquires the target moisture content,
The target shaft torque determination unit determines the target shaft torque from the relationship between the acquired target moisture content and the acquired sludge information,
The target operating parameter determining unit determines the target operating parameter from the relationship between the determined target shaft torque and the acquired sludge information.
3. A control device according to claim 2. The target operating parameter determining unit determines, as the target operating parameter, a target value for the addition rate of the flocculant injected into the sludge dehydrated by the sludge dehydrator.
A control device according to claim 9 . The control unit performs feedback control for adjusting 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 9 or 10. The control unit adjusts the addition rate of the flocculant injected into the sludge dehydrated by the sludge dehydrator as the determined target operating parameter.
Control device according to claim 11 . The control unit performs the feedback control by model predictive control.
13. A control device according to claim 11 or 12. The target shaft torque determination unit determines the target shaft torque using a learned model obtained by machine-learning the relationship between the moisture content of the dewatered sludge, the sludge information of the dewatered sludge, and the shaft torque of the rotary drive unit. do,
14. A control device according to any one of claims 2 to 6 and 9 to 13. The target operating parameter determining unit determines the target operating parameter using a learned model obtained by machine-learning the relationship between the shaft torque of the rotary drive unit and the sludge information of the dewatered sludge and the operating parameter.
15. A control device according to any one of claims 2 and 7-14. A controlled object priority determination unit that determines a priority for controlling a controlled object corresponding to each target operating parameter when there are a plurality of determined target operating parameters;
11. A control device according to any one of claims 7 to 10, further comprising: A heated dehydration system comprising the control device according to any one of claims 1 to 16. a target value acquisition process in which a target value acquisition unit acquires a first target value related to control of the sludge dehydrator, which is determined according to the operating state of an incinerator that incinerates dewatered sludge dehydrated by the sludge dehydrator; ,
a sludge information acquisition step in which the sludge information acquisition unit acquires sludge information including at least the sludge temperature, which is the temperature of the dehydrated sludge;
A target value determination unit determines a second target value related to control of a controlled object correlated with the first target value from the relationship between the acquired first target value and the acquired sludge information. a target value determination process;
a control process in which the control unit controls the controlled object according to the determined second target value;
Control method including. the computer,
target value acquisition means for acquiring a first target value related to control of the sludge dehydrator, which is determined according to the operating state of an incinerator that incinerates dewatered sludge dehydrated by the sludge dehydrator;
Sludge information acquisition means for acquiring sludge information including at least the sludge temperature, which is the temperature of the dehydrated sludge;
Target value determination means for determining a second target value related to control of a controlled object correlated with the first target value from the relationship between the acquired first target value and the acquired sludge information;
Control means for controlling the controlled object according to the determined second target value;
A program to function as

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