Control device, heating and dehydration system, control method, and program

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

[Technical Field]

[0001] The present invention relates to a control device, a heating and dehydration system, a control method, and a program. [Background technology]

[0002] Conventionally, in sludge dehydrators such as screw presses and centrifugal dehydrators, the moisture content of the sludge discharged from the sludge dehydrator (hereinafter also referred to as "dehydrated sludge") can be estimated based on the axial torque of the screw shaft. Attempts have been made to maintain a constant moisture content of the dehydrated sludge by performing constant torque control according to the estimated moisture content.

[0003] For example, Patent Document 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 multiple parameters include, for example, values related to the rotation of the bowl and screw, values related to the amount and solid concentration of sludge and separated water, and values related to the amount of coagulant, but do not include a value related to the temperature of the sludge. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2020-114569 Summary of the Invention [Problem to be solved by the invention]

[0005] The viscosity of sludge changes with changes in sludge temperature, and changes in sludge properties due to changes in sludge temperature also cause changes in viscosity. This change in sludge viscosity due to changes in sludge temperature also changes the relationship between the shaft torque of the sludge dehydrator and the moisture content of the dehydrated sludge. Therefore, when the sludge temperature changes in the sludge dehydrator, it is preferable to take the change in sludge temperature into consideration in order to maintain a constant moisture content of the dehydrated sludge. However, in the technology of Patent Document 1 described above, the change in sludge temperature is not taken into consideration. Therefore, when the sludge temperature changes in the sludge dehydrator, it is difficult to keep the water content of the dehydrated sludge discharged from the sludge dehydrator constant by the method of controlling the water content of the dehydrated sludge as in the technology of Patent Document 1.

[0006] In view of the above problems, an object of the present invention is to provide a control device, a heating and dehydration system, a control method, and a program capable of operating a sludge dehydrator so that dehydrated sludge with a stable water content is discharged even when the sludge temperature changes in the sludge dehydrator.

Means for Solving the Problems

[0007] In order to solve the above problems, a control device according to an aspect of the present invention includes an incinerator that incinerates dehydrated sludge dehydrated by a sludge dehydrator Either a target moisture content indicating a target value of the moisture content of the dewatered sludge desired at [location], or a target shaft torque indicating a target value of the shaft torque of the rotational drive unit of the sludge dehydrator necessary to obtain the dewatered sludge with the desired moisture content in the incinerator , a target value acquisition unit that acquires a first target value related to the control of the sludge dehydrator as , and a sludge information acquisition unit that acquires sludge information including at least the sludge temperature that is the temperature of the dehydrated sludge information indicating factors that affect the correlation between the moisture content and the shaft torque in the operation of the sludge dehydrator, , a target value determination unit, and a control unit that controls the control target according to the determined second target value. When the obtained first target value is the target moisture content, a target shaft torque determination unit that determines, based on the target moisture content and the sludge information, the target shaft torque that is in a correlation with the moisture content as a second target value for the control of the control target, or when the obtained first target value is the target shaft torque, a target operating parameter determination unit that determines, based on the target shaft torque and the sludge information, a target operating parameter that is a target value of an operating parameter other than the shaft torque that is in a correlation with the shaft torque in the operation of the sludge dehydrator as the second target value, comprising at least one of them , the control target is at least one of a controllable part of the sludge dehydrator or a pump that controls the supply to the sludge dehydrator, which requires control according to the first target value and the sludge information .

[0008] A heating and dehydration system according to an aspect of the present invention includes a control device.

[0009] A control method according to an aspect of the present invention includes a target value acquisition process in which a target value acquisition unit acquires an incinerator that incinerates dehydrated sludge dehydrated by a sludge dehydrator Either a target moisture content indicating a target value of the moisture content of the dewatered sludge desired at [location], or a target shaft torque indicating a target value of the shaft torque of the rotational drive unit of the sludge dehydrator necessary to obtain the dewatered sludge with the desired moisture content in the incinerator , a first target value related to the control of the sludge dehydrator as , a sludge information acquisition process in which a sludge information acquisition unit acquires sludge information including at least the sludge temperature that is the temperature of the dehydrated sludge information indicating factors that affect the correlation between the moisture content and the shaft torque in the operation of the sludge dehydrator, , a target value determination process, and a control process in which a control unit controls the control target according to the determined second target value. When the obtained first target value is the target moisture content, a target shaft torque determination process in which a target shaft torque determination unit determines, based on the target moisture content and the sludge information, the target shaft torque that is in a correlation with the moisture content as a second target value for the control of the control target, or when the obtained first target value is the target shaft torque, a target operating parameter determination process in which a target operating parameter determination unit determines, based on the target shaft torque and the sludge information, a target operating parameter that is a target value of an operating parameter other than the shaft torque that is in a correlation with the shaft torque in the operation of the sludge dehydrator as the second target value, including at least one of them See, the control target is at least one of a controllable part of the sludge dehydrator that requires control according to the first target value and the sludge information, or a pump that controls the supply to the sludge dehydrator .

[0010] A program according to one aspect of the present invention causes a computer to function as an incinerator that incinerates dehydrated sludge dehydrated by a sludge dehydrator Either a target moisture content indicating a target value of the moisture content of the dewatered sludge desired at [location], or a target shaft torque indicating a target value of the shaft torque of the rotary drive part of the sludge dehydrator required to obtain the dewatered sludge with the desired moisture content in the incinerator , a first target value related to the control of the sludge dehydrator as Target value acquisition means for acquiring information indicating a factor that affects the correlation between the moisture content and the shaft torque in the operation of 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 When the acquired first target value is the target moisture content, based on the target moisture content and the sludge information, determine the target shaft torque that is in a correlation with the moisture content as a second target value for controlling the control target, or when the acquired first target value is the target shaft torque, based on the target shaft torque and the sludge information, determine the target operating parameter, which is a target value of an operating parameter other than the shaft torque that is in a correlation with the shaft torque in the operation of the sludge dehydrator, as the second target value. Function as at least one of the target shaft torque determination means or the target operating parameter determination means Target value determination means, and control means for controlling the control target according to the determined second target value See, the control target is at least one of a controllable part of the sludge dehydrator that requires control according to the first target value and the sludge information, or a pump that controls the supply to the sludge dehydrator .

Effect of the Invention

[0011] According to the present invention, even when the sludge temperature changes in the sludge dehydrator, the sludge dehydrator can be operated so that dehydrated sludge with a stable moisture content is discharged.

Brief Description of the Drawings

[0012]

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Embodiments for Carrying Out the Invention

[0013] 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 in the sludge dehydrator.

[0014] In the following embodiments, the first target value is a target value related to the control of the sludge dehydrator, which is determined according to the operating state of an incinerator that incinerates the dehydrated sludge dehydrated by the sludge dehydrator. The first target value is, for example, the water content of the dewatered sludge, which is the desired water content of the dewatered sludge in the incinerator. Further, the first target value may be, for example, the shaft torque of the rotary drive unit of the sludge dehydrator, which is the shaft torque required to obtain dewatered sludge with the desired water content in the incinerator. The second target value is a target value regarding the control of a controlled object that has a correlation relationship with the first target value, based on the relationship between the first target value and the sludge information. For example, when the first target value is the water content of the dewatered sludge, the second target value is the shaft torque required to obtain dewatered sludge with that water content. Further, when the first target value is the shaft torque of the rotary drive unit of the sludge dehydrator, the second target value is an operating parameter of the sludge dehydrator other than the shaft torque of the rotary drive unit of the sludge dehydrator. The operating parameters are, for example, the addition rate of the flocculant, the press-in 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 chemical injection rate of the polymer flocculant, and the like.

[0015] The sludge information is information that includes at least the sludge temperature, which is the temperature of the sludge being dehydrated by the sludge dehydrator. In addition to the sludge temperature, the sludge information includes, for example, the sludge mixing ratio, the sludge supply amount, the chemical injection rate of the polymer flocculant, the viscosity of the polymer flocculant, the addition rate of the flocculant, and the like. The controlled object is, for example, in addition to the controllable part of the sludge dehydrator including the rotary drive unit, a pump that supplies sludge, a polymer flocculant, warm water, etc. to the sludge dehydrator.

[0016] In the present invention, the second target value is determined from the relationship between the first target value and the sludge information, and the control of the controlled object is performed according to the determined second target value. The determination of the second target value is performed using at least one of a target shaft torque determination model or a target operating parameter determination model.

[0017] The target shaft torque determination model is a model that uses the target water content of the dewatered sludge as the first target value and determines the target shaft torque, which is the target value of the shaft torque in the rotary drive unit of the sludge dehydrator, as the second target value from the target water content and the sludge information. The target operation parameter determination model is a model that uses the target shaft torque in the rotational drive unit of the sludge dewatering machine as the first target value, and determines the target operation parameters, which are the target values of the operation parameters of the sludge dewatering machine other than the shaft torque, from the target shaft torque and the sludge information as the second target value.

[0018] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0019] <<1. First Embodiment>> Referring to FIGS. 1 to 4, the first embodiment will be described. 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.

[0020] <1-1. Configuration of the Heating and Dewatering System> First, referring to FIG. 1, the configuration of the heating and dewatering system according to the first embodiment will be described. FIG. 1 is a diagram showing an example of the configuration of the heating and dewatering system according to the first embodiment. In the first embodiment, the heating and dewatering system 1 includes a flocculation device 10, a thickening device 20, a thickened sludge supply pump 30, a flocculant supply pump 40, a flocculant flow meter 45, a press-in pressure sensor 48, a heating and dewatering machine 50, a torque sensor 51, a thermo thermometer 52, a dewatered sludge hopper 55, a heat medium supply pump 60, a heat medium flow meter 65, a dewatered sludge supply pump 70, a sludge flow meter 78, an incineration facility 80, and a control panel 100.

[0021] The flocculation device 10 has a flocculation tank that adds a polymer flocculant B to the organic sludge A such as mixed raw sludge generated and supplied from a sewage treatment plant or the like and flocculates it. In the flocculation tank, there is a stirring function for stirring the organic sludge A and the polymer flocculant B. The organic sludge A and the polymer flocculant B are stirred and mixed and flocculated. The flocculation device 10 supplies the flocculated organic sludge A as flocculated sludge C to the thickening device 20.

[0022] The concentration device 20 concentrates the flocculated sludge C flocculated by the flocculation device 10. For example, the concentration device 20 has a concentration filtration screen inside, and separates and concentrates the moisture of the flocculated sludge C supplied from the flocculation device 10 by this concentration filtration screen. The concentrated sludge supply pump 30 supplies the concentrated sludge discharged from the concentration device 20 to the heating dehydrator 50 as concentrated sludge D.

[0023] The flocculant supply pump 40 has its output side connected to the path connecting the concentrated sludge supply pump 30 and the heating dehydrator 50. The flocculant supply pump 40 supplies a flocculant to the concentrated sludge D supplied from the concentrated 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. As this inorganic flocculant, for example, polyferric sulfate (PFS) can be used. The flocculant flow meter 45 measures the supply amount of the flocculant supplied from the flocculant supply pump 40 to the concentrated sludge D, and outputs the measurement result to the control panel 100. The press-in pressure sensor 48 detects the press-in pressure of the concentrated sludge D supplied to the heating dehydrator 50, and outputs the detection result to the control panel 100.

[0024] The heating dehydrator 50 is a sludge dehydrator having a function of heating sludge, and dehydrates the concentrated sludge D supplied from the concentrated sludge supply pump 30. When an inorganic flocculant is supplied to the concentrated sludge D by the flocculant supply pump 40, the heating dehydrator 50 dehydrates the concentrated sludge D after the inorganic flocculant is injected. In the first embodiment, the case where the heating dehydrator 50 is a vertical screw press will be described, but any dehydrator that can dehydrate the concentrated sludge may be a horizontal screw press or a rotary press.

[0025] In the heating dehydrator 50, a filtration screen 50B for filtering the concentrated sludge D is disposed within a casing 50A, and the concentrated sludge D is supplied to a first space 50A1 among a plurality of spaces within the casing 50A separated by this filtration screen 50B.

[0026] Further, the heating dehydrator 50 includes an inner filtration screen 50Ba, an outer filtration screen 50Bb, and a ribbon screw 50d. The inner filtration screen 50Ba, as the second filtration screen 50B, is disposed within the casing 50A in a cylindrical or conical shape centered on an axis extending in the longitudinal direction coaxial with the casing 50A. The outer filtration screen 50Bb is disposed within the casing 50A at an interval outside the inner filtration screen 50Ba in a cylindrical or conical shape coaxial with the inner filtration screen 50Ba. The ribbon screw 50d has a spiral shape twisted around the above axis and is accommodated between the inner filtration screen 50Ba and the outer filtration screen 50Bb, and is relatively rotated around the above axis with respect to the inner filtration screen 50Ba and the outer filtration screen 50Bb by a rotation drive unit 50c such as a motor.

[0027] The casing 50A is a bottomed cylindrical shape centered on the above axis. The inner filtration screen 50Ba and the outer filtration screen 50Bb are formed of, for example, wedge wire, punching metal, or the like. And the concentrated sludge D is supplied to the space between the inner filtration screen 50Ba and the outer filtration screen 50Bb as the first space 50A1. The space on the outer side of the outer filtration screen 50Bb and on the inner peripheral side of the casing 50A is a second space 50A2. The space inside the inner filtration screen 50Ba is a third space 50A3.

[0028] The heating unit 50A4 heats the concentrated sludge D in the heating and dehydrating machine 50. For example, the heating unit 50A4 heats the accommodating portion containing the concentrated sludge D from the outer peripheral side. In this embodiment, the heating unit 50A4 is located outside the outer filtration screen 50Bb and inside the inner peripheral side space of the casing 50A (i.e., the second space 50A2). Warm water H is supplied from the heat medium supply pump 60 to this space, so that the filtrate and the warm water H are mixed. As a result, the temperature of the filtrate rises, and the temperature of the second space 50A2 rises. Therefore, heat is transferred to the concentrated sludge D through the outer filtration screen 50Bb, and the concentrated sludge D can be heated. In this way, the accommodating portion is heated from the outer peripheral side. Here, the case where the accommodating portion is the filtration screen 50B will be described. However, it is only necessary to be able to heat the concentrated sludge D supplied from outside the heating and dehydrating machine 50. If the concentrated sludge D is accommodated in the accommodating portion, for example, an accommodating site where the filtration screen is not formed in the axial direction in the filtration screen 50B may be provided, and that accommodating site may be heated. Also, both that accommodating site and the filtration screen 50B may be heated.

[0029] Note that the heating unit 50A4 may heat the entire accommodating portion, or may heat a partial region in the axial direction, or may heat a partial region in the circumferential direction.

[0030] Also, the case where the medium for heating the accommodating portion is warm water H will be described. However, if the accommodating portion can be heated, other media may be used. Also, a heater or the like may be used.

[0031] The temperature of the warm water H only needs to be higher than the temperature of the concentrated sludge D. The temperature of the warm water H is, for example, in the range of 50°C or higher and less than 100°C, desirably in the range of 60°C or higher and 90°C or lower. Here, if the temperature of the warm water H is less than 50°C, the effects such as the reduction in the viscosity of the concentrated sludge D and the separation of water due to the above-described method cannot be fully obtained. Further, if the temperature of the warm water H exceeds 100°C, the difficulty of handling increases. Note that the higher the temperature of the warm water H, the more it can promote the reduction in the viscosity of the concentrated sludge D and the separation of water due to the thermal denaturation of proteins. However, when using the warm water used in the treatment facility for the organic sludge A as the warm water H as described above, a temperature range of 60°C or higher and 90°C or lower is realistic.

[0032] Such warm water H is supplied from the bottom of the casing 50A into the second space 50A2 within the casing 50A. The warm water H thus supplied into the second space 50A2 warms the concentrated sludge D within the first space 50A1. By using the warm water H as a heat medium and heating the concentrated sludge D, the water that had been retained due to the thermal denaturation of the proteins in the concentrated sludge D separates. By using the warm water H as a heat medium and heating the concentrated sludge D, the viscosity of the concentrated sludge D decreases. Then, the concentrated sludge D is filtered by the inner filtration screen 50Ba and the outer filtration screen 50Bb. The filtrate is discharged as drainage J from the drain pipe 50H that rises from the second space 50A2. Also, the warm water H cooled by heating the concentrated sludge D is discharged as drainage J from the drain pipe 50H together with the filtrate.

[0033] The connecting plate 50e connects the bottoms of the inner filtration screen 50Ba and the outer filtration screen 50Bb. The shape of the connecting plate 50e is an annular plate shape. A supply pipe 50f is connected to this connecting plate 50e. The supply pipe 50f supplies the concentrated sludge D supplied from the concentrated sludge supply pump 30 into the first space 50A1 from the bottom of the casing 50A. The concentrated sludge D supplied from the supply pipe 50f is conveyed upward by the relative rotation of the ribbon screw 50d, and water is separated by the inner filtration screen 50Ba and the outer filtration screen 50Bb. Here, since a large filtration area can be ensured, more efficient filtration can be achieved.

[0034] Also, an annular plate-shaped substrate 50C is disposed at the upper part inside the casing 50A. The outer filtration screen 50Bb is attached and fixed to the inner peripheral portion of this substrate 50C. Further, a lid body 50D is disposed at the upper opening of the casing 50A above this substrate 50C, and the inner filtration screen 50Ba is attached and fixed to this lid body 50D. The rotary drive unit 50c is disposed on this lid body 50D and rotates the ribbon screw 50d via a cylindrical screw support body that covers the upper part of the inner filtration screen 50Ba. In the first embodiment, the inner filtration screen 50Ba and the outer filtration screen 50Bb are fixed to the casing in this way, and the ribbon screw 50d is rotated by the rotary drive unit 50c. Conversely, the ribbon screw 50d may be fixed and the inner filtration screen 50Ba and the outer filtration screen 50Bb may be rotated, or the ribbon screw 50d and the inner filtration screen 50Ba and the outer filtration screen 50Bb may be rotated in opposite directions to each other.

[0035] Also, in the casing 50A, the upper space between the substrate 50C and the lid body 50D is defined as a discharge chamber 50E, and the annular upper opening of the first space 50A1 in this discharge chamber 50E is defined as a discharge port 50F. A back pressure plate 50G having a frustum-shaped outer peripheral surface centered on the above axis that slopes upward as it goes toward the outer peripheral side is disposed at this discharge port 50F. The dehydrated sludge I dehydrated from the concentrated sludge D with moisture separated while being conveyed upward in the first space 50A1 by the ribbon screw 50d flows out into the discharge chamber 50E while being squeezed by the back pressure plate 50G from the discharge port 50F and is discharged. A back pressure plate drive unit is attached to the back pressure plate 50G. The back pressure plate drive unit moves the back pressure plate in the longitudinal direction of the above axis to an opening degree corresponding to an instruction from the control panel 100. The back pressure sensor 50Gs detects the opening degree of the back pressure plate.

[0036] The torque sensor 51 measures the shaft 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 unit 50c. The torque sensor 51 measures the torque of the rotation drive unit 50c as the shaft torque in the heating dehydrator 50, and outputs the measurement result to the control panel 100.

[0037] The thermo thermometer 52 measures the temperature of the sludge dehydrated by the heating dehydrator 50 (sludge temperature). For example, the thermo thermometer 52 is provided so as to be able to measure the temperature of the dehydrated sludge I discharged into the discharge chamber 50E after being dehydrated. 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.

[0038] The dehydrated sludge hopper 55 temporarily stores the dehydrated sludge I discharged from the heating dehydrator 50. 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. A weighing scale (not shown) is provided in the dehydrated sludge hopper 55. The weighing scale provided in the dehydrated sludge hopper 55 measures the weight of the dehydrated sludge hopper 55, and outputs the measurement result to the control panel 100. For example, the weighing scale measures the weight of the dehydrated sludge hopper 55 before the start of the supply of the dehydrated sludge I and the weight of the dehydrated sludge hopper 55 in a state where the supply of the dehydrated sludge I has been temporarily stopped after the start of the supply of the dehydrated sludge I. From the difference between these weights, the supply amount of the dehydrated sludge I supplied to the incineration facility 80 can be calculated.

[0039] The heat medium supply pump 60 supplies a heat medium heated by the heat obtained by the combustion of the sludge discharged from the heating dehydration system 1 to the heating dehydrator 50 (for example, the heating unit 50A4). The heat medium flow meter 65 measures the amount of the warm water H supplied from the heat medium supply pump 60 to the heating unit 50A4, and outputs the measurement result to the control panel 100.

[0040] 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 flowmeter 78 measures the supply amount (sludge supply amount) of the sludge (dewatered sludge I) supplied from the dewatered sludge supply pump 70 to the incineration facility 80, and outputs the measurement result to the control panel 100.

[0041] The incineration facility 80 incinerates the dewatered sludge I discharged from the heating and dewatering machine 50. The incineration facility 80 includes an incinerator 81, a boiler 82, and a flue gas treatment tower 83. The incinerator 81 incinerates the dewatered sludge I supplied from the heating and dewatering machine 50. In the incinerator 81, if the moisture content of the dewatered sludge I can be operated so as to be near the auto-ignition point, the dewatered sludge I can be burned without using auxiliary fuel. Therefore, it is preferable that the fluctuation of the moisture content of the dewatered sludge I is small. Also, if the moisture content of the dewatered sludge I does not fluctuate from near the auto-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 or the like, and unnecessary dewatering (excessive reduction of the moisture content) can be suppressed.

[0042] The boiler 82 uses the heat of the combustion exhaust gas from the incinerator 81 to heat the heat medium by 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, but the boiler 82 further heats this water and then supplies it to the heat medium supply pump 60. Thereby, the heat medium heated by using the heat of the combustion exhaust gas can be supplied to the heating and dewatering machine 50.

[0043] The flue gas treatment tower 83 sprays water supplied from the outside to remove predetermined substances such as dust and impurities from the combustion exhaust gas supplied from the boiler 82, and exhausts the combustion exhaust gas from the chimney. Also, the flue gas treatment tower 83 heats the water supplied from the outside with the heat of the combustion exhaust gas and supplies it to the boiler 82. The control panel 100 controls each part in the heating and dewatering system 1. The control panel 100 is constituted by a computer or the like.

[0044] <1-2. Functional Configuration of Control Panel> The configuration of the heating and dehydration system 1 according to the first embodiment has been described above. Subsequently, 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 unit 110, a target value acquisition unit 120, a sludge information acquisition unit 130, a storage unit 140, a target value determination unit 150, and a control unit 160.

[0045] (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 part of the heating and dehydration system 1.

[0046] (2) Target value acquisition unit 120 The target value acquisition unit 120 acquires a first target value related to the control of the heating and dehydration machine 50, which is determined according to the operating state of the incinerator 81 that incinerates the dehydrated sludge dehydrated by the heating and dehydration machine 50. For example, the target value acquisition unit 120 acquires the water content rate of the dehydrated sludge desired in the incinerator 81 (hereinafter also referred to as the "target water content rate") as the first target value. As an example, the target value acquisition unit 120 acquires the target water content rate output from a control device or the like of the incineration facility 80 provided in the incineration facility 80.

[0047] (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 being dehydrated by the heating and dehydration machine 50. For example, the sludge information acquisition unit 130 acquires the sludge temperature from the thermo thermometer 52 as sludge information. Note that the sludge information acquisition unit 130 may acquire information other than the sludge temperature as sludge information. For example, the sludge information acquisition unit 130 may acquire the sludge mixing ratio, the sludge supply amount, the polymer coagulant injection rate (front stage or rear stage), the polymer coagulant viscosity, and the addition rate of the coagulant (for example, ferric polysulfate) as sludge information. The priority of the sludge information acquired by the sludge information acquisition unit 130 is, for example, in the order of sludge temperature = sludge mixing ratio > addition rate of coagulant > polymer coagulant injection rate (front stage and rear stage) > polymer coagulant viscosity > sludge supply amount. The sludge mixing ratio acquired by the sludge information acquisition unit 130 is, for example, the mixing ratio of primary sludge, excess sludge, digested sludge, etc. for the sludge supplied to the heating dehydrator 50. The sludge supply amount acquired by the sludge information acquisition unit 130 is, for example, the supply amount of the sludge supplied to the heating dehydrator 50. The polymer flocculant injection rate acquired by the sludge information acquisition unit 130 is, for example, the addition rate of the polymer flocculant B supplied from a polymer flocculant supply device (not shown) to the organic sludge A and the thickened sludge D. Here, the front stage of the polymer flocculant injection rate is, for example, the injection rate into the organic sludge A, and the rear stage of the polymer flocculant injection rate is, for example, the injection rate into the 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 from a polymer flocculant supply device (not shown) to the organic sludge A and the thickened sludge D. The addition rate of the flocculant acquired by the sludge information acquisition unit 130 is, for example, the addition rate of the flocculant supplied to the thickened sludge D (the ratio of the flocculant to the thickened sludge D).

[0048] (4) Memory unit 140 The memory unit 140 has a function of storing various information. The memory unit 140 is composed of a storage medium, for example, an 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 Memory), ROM (Read Only Memory), or an arbitrary combination of these storage media. As shown in FIG. 2, the memory unit 140 has a target axis torque determination model 141.

[0049] (4-1) Target axis torque determination model 141 The target axis torque determination model 141 determines the target axis torque in the rotation drive unit 50c of the heating dehydrator 50 based on the target moisture content of the dehydrated sludge and the sludge information. The target axis torque determination model 141 is, for example, a learned model obtained by machine learning the relationship between the moisture content of the dehydrated sludge, the sludge information, and the axis torque of the rotation drive unit 50c. That is, when the moisture content of the dehydrated sludge and the sludge information are input as input data, the target axis torque determination model 141 can output the axis torque of the rotation drive unit 50c as output data.

[0050] The sludge information used as the input data of the target axis torque determination model 141 is specifically the sludge temperature, sludge mixing ratio, sludge supply amount, polymer flocculant injection rate, polymer flocculant viscosity, addition rate of the flocculant, etc., and includes at least the sludge temperature.

[0051] Any machine learning method may be applied to the target axis torque determination model 141. Any machine learning method is, for example, linear regression, support vector machine regression, Gaussian process regression, decision tree, neural network, etc. Note that the target axis torque determination model 141 is not limited to a learned model obtained by machine learning. For example, the target axis torque determination model 141 may be a regression model, a regression formula, a classification model, etc.

[0052] (5) Target value determination unit 150 The target value determination unit 150 determines a second target value related to the control of the control target having a correlation with the first target value from the relationship between the first target value acquired by the target value acquisition unit 120 and the sludge information acquired by the sludge information acquisition unit 130. As shown in FIG. 2, the target value determination unit 150 includes only the target axis torque determination unit 151.

[0053] (5-1) Target axis torque determination unit 151 The target axis torque determination unit 151 determines the target axis torque based on the relationship between the target moisture content (the 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 axis torque determination model 141 is used to determine the target axis torque. In the first embodiment, it is assumed that the target axis torque determination unit 151 uses the machine-learned target axis torque determination model 141. Specifically, the target axis torque determination unit 151 inputs the target moisture content and the sludge information as input data into the target axis torque determination model 141, and determines the output axis torque as the target axis torque.

[0054] (6) Control unit 160 The control unit 160 controls the control target according to the target axis torque (the second target value) determined by the target axis torque determination unit 151, thereby controlling the axis torque of the rotation drive unit 50c (torque control). For example, the control unit 160 determines the operation parameters such that the axis torque of the rotation drive unit 50c of the heating and dehydration machine 50 becomes the target axis torque, and controls the control target. As an example, the control unit 160 determines the addition rate of the flocculant (an example of the operation parameter) according to the target axis torque, and controls the flocculant supply pump 40 (an example of the control target). In addition, the control unit 160 performs feedback control based on the result of controlling the addition rate of the flocculant of the control target according to the target axis torque. For example, when the addition rate of the flocculant after the control of the flocculant supply pump 40 does not reach the target addition rate (the determined operation parameter), the control unit 160 controls the flocculant supply pump 40 so that the addition rate of the flocculant after the control approaches the target addition rate. The control unit 160 performs feedback control by, for example, PID (Proportional Integral Differential) control or model predictive control.

[0055] <1-3. Input and output on the control panel> The functional configuration of the control panel 100 according to the first embodiment has been described above. Next, with reference to FIG. 3, the input and output on the control panel 100 according to the first embodiment will be described. FIG. 3 is a diagram showing an example of the input and output on the control panel 100 according to the first embodiment.

[0056] As shown in FIG. 3, the target shaft torque determination model 141 receives the target moisture content and sludge information as inputs. The target moisture content is obtained by the target value acquisition unit 120. The sludge information is obtained by the sludge information acquisition unit 130. Based on the input target moisture content of the dewatered sludge and the sludge information, the target shaft torque determination model 141 outputs the target shaft torque in the rotation drive unit 50c of the heating dehydrator 50. The target shaft torque output from the target shaft torque determination model 141 is input to the control unit 160. The control unit 160 controls the shaft torque of the rotation drive unit 50c (torque control) by, for example, controlling the addition rate of the flocculant (operation parameter) according to the input target shaft torque. The control target in this case is specifically the supply amount of the flocculant supplied from the flocculant supply pump 40. The control unit 160 acquires the addition rate of the flocculant after controlling the control target and performs feedback control.

[0057] <1-4. Operation of the control panel> The input and output in the control panel 100 according to the first embodiment have been described above. Next, with reference to FIG. 4, the operation of the control panel 100 according to the first embodiment will be described. FIG. 4 is a flowchart showing an example of the operation of the control panel 100 according to the first embodiment.

[0058] As shown in FIG. 4, first, the target value acquisition unit 120 of the control panel 100 acquires the target moisture content (step S101). For example, the target value acquisition unit 120 acquires the target moisture content from the incineration facility 80.

[0059] Next, the sludge information acquisition unit 130 of the control panel 100 acquires the sludge information (step S102). For example, the sludge information acquisition unit 130 acquires the sludge information including at least the sludge temperature measured by the thermo thermometer 52.

[0060] Next, the target axis torque determination unit 151 of the control panel 100 determines the target axis torque (step S103). For example, the target axis torque determination unit 151 determines the target axis torque using the target axis torque determination model 141 stored in the storage unit 140 of the control panel 100. Specifically, the target axis torque determination unit 151 determines the axis torque output from the target axis torque determination model 141 using the target moisture content acquired by the target value acquisition unit 120 and the sludge information acquired by the sludge information acquisition unit 130 as input data as the target axis torque.

[0061] Next, the control unit 160 of the control panel 100 performs control of the controlled object (step S104). For example, the control unit 160 controls the supply amount of the flocculant supplied from the flocculant supply pump 40 according to the target axis torque determined by the target axis torque determination unit 151.

[0062] Next, the control unit 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 addition rate of the flocculant, and performs feedback control so that the addition rate of the flocculant approaches the target addition rate.

[0063] As described above, the control panel 100 (control device) according to the first embodiment includes a target value acquisition unit 120, a sludge information acquisition unit 130, a target value determination unit 150, and a control unit 160. The target value acquisition 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 furnace 81 that incinerates the dehydrated sludge dehydrated by the heating dehydrator 50 (sludge dehydrator). 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 the control of the controlled object having a correlation with the first target value from the relationship between the acquired first target value and the acquired sludge information. The control unit 160 controls the controlled object according to the determined second target value.

[0064] With such a configuration, the control panel 100 according to the first embodiment controls the operation of the heating and dewatering machine 50 according to the change in the sludge temperature of the sludge in the heating and dewatering machine 50, so that the moisture content of the dehydrated sludge discharged from the heating and dewatering machine 50 can be kept constant.

[0065] Therefore, the control panel 100 according to the first embodiment enables the dehydrator to operate at a stable moisture content even when the sludge temperature changes.

[0066] Further, the control panel 100 according to the first embodiment includes a target axis torque determination unit 151 that determines the target axis torque using the target axis torque determination model 141. Thereby, the control panel 100 can accurately determine the target axis torque.

[0067] <<2. Second Embodiment>> The first embodiment has been described above. Subsequently, with reference to FIGS. 5 to 8, the second embodiment will be described. In the second embodiment, an example in which only the target operation parameter determination model is used to determine the second target value will be described. Note that hereinafter, descriptions overlapping with those in the first embodiment will be omitted as appropriate.

[0068] <2-1. Configuration of Heating and Dewatering System> Since the configuration of the heating and dewatering system according to the second embodiment is the same as the configuration of the heating and dewatering system 1 according to the first embodiment, overlapping descriptions will be omitted.

[0069] <2-2. Functional Configuration of Control Panel> The configuration of the heating and dewatering system according to the second embodiment has been described above. Subsequently, with reference to FIG. 5, the functional configuration of the control panel 100a according to the second embodiment will be described. 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 control target priority determination unit 170.

[0070] (1) Communication unit 110 Since the functions of the communication unit 110 according to the second embodiment are the same as those of the communication unit 110 according to the first embodiment, duplicate explanations are omitted.

[0071] (2) Target value acquisition unit 120a The target value acquisition unit 120a acquires, for example, the axial torque (hereinafter also referred to as "target axial torque") required to obtain dewatered sludge with a desired moisture content in the incinerator 81 as the first target value. As an example, the target value acquisition unit 120 acquires the target axial torque output from a control device or the like of the incineration facility 80 provided in the incineration facility 80.

[0072] (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, in the order of sludge temperature = sludge mixing ratio >> sludge supply amount.

[0073] (4) Storage unit 140a As shown in FIG. 5, the storage unit 140a has a target operation parameter determination model 142.

[0074] (4-1) Target operation parameter determination model 142 The target operation parameter determination model 142 determines target operation parameters based on the target axial torque of the rotation drive unit 50c of the heating and dewatering machine 50 and the sludge information. The target operation parameter determination model 142 is, for example, a learned model in which the relationship between the axial torque of the rotation drive unit 50c, the sludge information, and the operation parameters is machine-learned. That is, when the axial torque of the rotation drive unit 50c and the sludge information are input as input data, the target operation parameter determination model 142 can output operation parameters as output data.

[0075] The sludge information used as the input data for the target operation parameter determination model 142 specifically includes sludge temperature, sludge mixing ratio, sludge supply amount, etc., and includes at least the sludge temperature. The operation parameters include the addition rate of the flocculant, 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 flocculant injection rate, etc.

[0076] The operation parameters output by the target operation parameter determination model 142 are set according to, for example, the type of sludge dehydrator. For example, in general sludge dehydrators, the addition rate of the flocculant, the sludge supply amount, and the polymer flocculant injection rate are set to be output from the target operation parameter determination model 142. Also, when the sludge dehydrator is a metal filter medium type dehydrator, the injection pressure and the back pressure closing rate are set to be output from the target operation parameter determination model 142. Also, when the sludge dehydrator is a centrifugal dehydrator, the differential speed and the centrifugal acceleration are set to be output from the target operation 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 to be output from the target operation parameter determination model 142.

[0077] Any machine learning method may be applied to the target operation parameter determination model 142. Any machine learning method refers to, for example, linear regression, support vector machine regression, Gaussian process regression, decision tree, neural network, etc. Note that the target operation parameter determination model 142 is not limited to a machine-learned learned model. For example, the target operation parameter determination model 142 may be a regression model, a regression calculation formula, a classification model, etc.

[0078] (5) Target value determination unit 150a The target value determination unit 150a determines a second target value related to the control of the control target having a correlation with the first target value from the relationship between the first target value acquired by the target value acquisition unit 120a and the sludge information acquired by the sludge information acquisition unit 130a. As shown in FIG. 5, the target value determination unit 150a includes only the target operation parameter determination unit 152.

[0079] (5-1) Target operating parameter determination unit 152 The target operating parameter determination unit 152 determines the target operating parameters based on the relationship between the target shaft torque (the first target value) acquired by the target value acquisition unit 120a and the sludge information acquired by the sludge information acquisition unit 130a. For example, the target operating parameter determination model 142 is used to determine the target operating parameters. In the second embodiment, it is assumed that the target operating parameter determination unit 152 uses the machine-learned target operating parameter determination model 142. Specifically, the target operating parameter determination unit 152 inputs the target shaft torque and the sludge information as input data into the target operating parameter determination model 142 and determines the output operating parameters as the target operating parameters.

[0080] (6) Control unit 160a The control unit 160a controls the control target according to the target operating parameters (the second target value) determined by the target operating parameter determination unit 152, thereby controlling the shaft torque of the rotation drive unit 50c. For example, when the operating parameter includes the addition rate of the flocculant, the control unit 160a controls the flocculant supply pump 40 (the control target) to adjust the amount of the flocculant supplied from the flocculant supply pump 40, thereby adjusting the addition rate of the flocculant. Also, when the operating parameter includes the press-in pressure, the control unit 160a controls the rotation speed of the ribbon screw 50d (the control target) to adjust the press-in pressure. Also, when the operating parameter includes the back pressure closing rate, the control unit 160a controls the back pressure plate 50G (the control target) to adjust the opening degree of the back pressure plate 50G, thereby adjusting the back pressure closing rate. Also, when the operating parameter includes the differential speed, the control unit 160a controls the rotation speed of the screw conveyor (the control target) in the centrifuge to adjust the differential speed. Also, when the operating parameter includes the centrifugal acceleration, the control unit 160a controls the speed of the bowl (the control target) in the centrifuge to adjust the centrifugal acceleration. Also, when the sludge supply amount is included in the operation parameters, the control unit 160a adjusts the sludge supply amount by controlling the concentrated sludge supply pump 30 (control target) to adjust the amount of the concentrated sludge D supplied from the concentrated sludge supply pump 30. Also, when the heat medium temperature is included in the operation parameters, the control unit 160a adjusts the heat medium temperature by controlling, for example, the amount of the heat medium supplied from a heat medium supply facility (not shown, control target) to the boiler 82. Also, when the heat medium flow rate is included in the operation parameters, the control unit 160a adjusts the heat medium flow rate by controlling the heat medium supply pump 60 to adjust the amount of the heat medium (hot water H) supplied from the heat medium supply pump 60. Also, when the polymer flocculant dosing rate is included in the operation parameters, the control unit 160a adjusts the polymer flocculant dosing rate by controlling a polymer flocculant supply pump (not shown, control target) to adjust the amount of the polymer flocculant B supplied to the organic sludge A or the concentrated sludge D.

[0081] Also, the control unit 160a performs feedback control based on the result of controlling the control target according to the target operation parameters. As an example, when the addition rate of the flocculant after the control of the flocculant supply pump 40 does not reach the target operation parameters, the control unit 160a controls the flocculant supply pump 40 so that the addition rate of the flocculant after the control approaches the target operation parameters. The feedback control for other control targets is the same.

[0082] (7) Control target priority determination unit 170 When there are a plurality of determined target operation parameters, the control target priority determination unit 170 determines the priority for controlling the control targets corresponding to the respective target operation parameters.

[0083] Here, with reference to FIG. 6, the priority of the control target will be described. FIG. 6 is a diagram showing an example of the control of the priority of the control target according to the second embodiment. The vertical axis of the graph shown in FIG. 6 represents the control output of each control target, and the horizontal axis represents the control output of the control unit. Note that FIG. 6 shows an example in the case where the heating dehydrator 50 is a metal filter medium dehydrator and the operation parameters are the coagulant addition rate, the press-in pressure, and the back pressure closing rate.

[0084] As shown in FIG. 6, the priority of the control output (i.e., the priority of the control target) is set in order from the highest priority as the press-in pressure, the back pressure closing rate, and the coagulant addition rate. The priority is set in consideration of cost and controllability. When considering cost, 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 coagulant addition rate shown in FIG. 6, it is necessary to add a coagulant to increase the coagulant addition rate, but since the cost of the coagulant is high, the priority is set low. When considering controllability, the priority of a control output with high controllability is set high, and the priority of a control output with low controllability is set low. For example, a control output with high reproducibility of the relationship between the change in the control amount and the change in the torque of the control target, or a control output with a fast response is evaluated as having high controllability. The timing of the start and end of the operation of the control output of each control target, and the slope which is the change rate of the control amount are adjusted according to the characteristics of the equipment and the state of the target sludge. The control output at the start of control outputs an output suitable for the input target shaft torque by the target operation parameter determination model 142. The error due to the accuracy of the target operation parameter determination model 142 is adjusted by torque control (feedback control) by the control unit 160a. The target operation parameter determination unit 152 can instantaneously output an optimal control amount from past operation data and the know-how of the operator by using the target operation parameter determination model 142. Before automatic control by the control panel 100a, when manually operating each control amount separately, it is possible to switch to the 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.

[0085] <2-3. Input and Output in the Control Panel> As described above, the functional configuration of the control panel 100a according to the second embodiment has been described. Subsequently, with reference to FIG. 7, the input and output in the control panel 100a according to the second embodiment will be described. FIG. 7 is a diagram showing an example of input and output in the control panel 100a according to the second embodiment. Note that in FIG. 7, an example is shown in which the heating dehydrator 50 is a metal filter medium type dehydrator and the operation parameters are the addition rate of the flocculant, the pressure injection pressure, and the back pressure closing rate.

[0086] As shown in FIG. 7, the target operation parameter determination model 142 receives the target shaft torque and sludge information as inputs. The target shaft torque is obtained by the target value acquisition unit 120a. The sludge information is obtained by the sludge information acquisition unit 130a. The target operation parameter determination model 142 outputs the target operation parameters based on the input target shaft torque and sludge information. The target operation parameters output from the target operation parameter determination model 142 are input to the control target priority determination unit 170. The control target priority determination unit 170 inputs the target operation parameters to the control unit 160a according to the control target priority. The control unit 160a controls the control target according to the input target operation parameters. In addition, the control unit 160a acquires the measured values of the operation parameters measured at each control target after each control, and performs feedback control so that the measured values approach the target operation parameters.

[0087] <2-4. Operation of the Control Panel> The input and output of the control panel 100a according to the second embodiment have been described above. Next, the operation of the control panel 100a according to the second embodiment will be described with reference to Fig. 8. Fig. 8 is a flowchart showing an example of the operation of the control panel 100a according to the second embodiment.

[0088] 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 facility 80.

[0089] Next, the sludge information acquisition unit 130a of the control panel 100a acquires the sludge information (step S202). For example, the sludge information acquisition unit 130a acquires the sludge information including at least the sludge temperature measured by the thermometer 52.

[0090] Next, target operating parameter determination unit 152 of control panel 100a determines target operating parameters (step S203). For example, target operating parameter determination unit 152 determines the target operating parameters using target operating parameter determination model 142 stored in memory unit 140a of control panel 100. Specifically, target operating parameter determination unit 152 determines the target operating parameters to be the operating parameters output from target operating parameter determination model 142 using the target shaft torque acquired by target value acquisition unit 120a and the sludge information acquired by sludge information acquisition unit 130a as input data.

[0091] Next, the controlled object priority determination unit 170 of the control panel 100a determines the priority for controlling the controlled object corresponding to each target operating parameter (step S204).

[0092] Next, the control unit 160a of the control panel 100a controls the control objects (step S205). For example, the control unit 160a controls each control object according to the target operating parameters determined by the target operating parameter determination unit 152, in accordance with the priorities determined by the control object priority determination unit 170.

[0093] Next, the control unit 160a performs feedback control (step S206). For example, the control unit 160a acquires a measurement value measured for each control target after each control, and performs feedback control so that the measurement value approaches the target operation parameter.

[0094] As described above, the control panel 100a (control device) according to the second embodiment includes a target value acquisition unit 120a, a sludge information acquisition unit 130a, a target value determination unit 150a, and a control unit 160a. The target value acquisition unit 120a acquires a first target value related to the control of the heating and dehydration machine 50, which is determined according to the operating state of the incinerator 81 that incinerates the dehydrated sludge dehydrated by the heating and dehydration machine 50 (sludge dehydrator). The sludge information acquisition unit 130a acquires sludge information including at least the sludge temperature, which is the temperature of the dehydrated sludge. The target value determination unit 150a determines a second target value related to the control of the control target having a correlation with the first target value from the relationship between the acquired first target value and the acquired sludge information. The control unit 160a controls the control target according to the determined second target value.

[0095] With such a configuration, the control panel 100a according to the second embodiment can keep the moisture content of the dehydrated sludge discharged from the heating and dehydration machine 50 constant by controlling the operation of the heating and dehydration machine 50 according to the change in the sludge temperature of the sludge in the heating and dehydration machine 50.

[0096] Therefore, the control panel ********** is capable of operating the dehydrator at a stable moisture content even when the sludge temperature changes.

[0097] Further, the control panel 100a according to the second embodiment includes a target operation parameter determination unit 152 that determines a target operation parameter using the target operation parameter determination model 142. Thereby, the control panel 100a can shorten the time until the shaft torque reaches the target shaft torque by controlling the operation parameter.

[0098] <<3. Third Embodiment>> It should be noted that there is an unclear part in the original text at line 15 where "**********" is left. You may need to check and correct it if necessary.The above described the second embodiment. Subsequently, referring to FIGS. 9 to 11, a third embodiment will be described. In the third embodiment, an example will be described in which the target axis torque determination model 141 and the target operation parameter determination model 142 are used to determine the second target value. Note that hereinafter, descriptions overlapping with those in the first and second embodiments will be omitted as appropriate.

[0099] <3-1. Configuration of Heating and Dehydration System> Since the configuration of the heating and dehydration system according to the third embodiment is the same as that of the heating and dehydration system 1 according to the first embodiment, overlapping descriptions will be omitted.

[0100] <3-2. Functional Configuration of Control Panel> The above described the configuration of the heating and dehydration system according to the third embodiment. Subsequently, referring 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 control target priority determination unit 170.

[0101] (1) Communication Unit 110 Since the function of the communication unit 110 according to the third embodiment is the same as that of the communication unit 110 according to the first embodiment, overlapping descriptions will be omitted.

[0102] (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 that of the target value acquisition unit 120 according to the first embodiment, overlapping descriptions will be omitted.

[0103] (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 sludge information acquisition unit 130a according to the second embodiment. Therefore, overlapping descriptions will be omitted.

[0104] (4) Memory unit 140b As shown in FIG. 9, the memory unit 140b has a target axis torque determination model 141 and a target operation parameter determination model 142.

[0105] (4-1) Target axis torque determination model 141 Since the function of the target axis torque determination model 141 according to the third embodiment is the same as the function of the target axis torque determination model 141 according to the first embodiment, duplicate explanations are omitted.

[0106] (4-2) Target operation parameter determination model 142 Since the function of the target operation parameter determination model 142 according to the third embodiment is the same as the function of the target operation parameter determination model 142 according to the second embodiment, duplicate explanations are omitted. Note that the target operation parameter determination model 142 according to the third embodiment does not use the target axis torque acquired by the target value acquisition unit 120 as input data. The target operation parameter determination model 142 according to the third embodiment uses the target axis torque determined by the target axis torque determination model 141 and the sludge information acquired by the sludge information acquisition unit 130b as input data.

[0107] (5) Target value determination unit 150b The target value determination unit 150b determines a second target value related to the control of the control target having a correlation with the first target value from the relationship between the first target value acquired by the target value acquisition unit 120 and the sludge information acquired by the sludge information acquisition unit 130b. As shown in FIG. 9, the target value determination unit 150b includes a target axis torque determination unit 151 and a target operation parameter determination unit 152.

[0108] (5-1) Target axis torque determination unit 151 Since the function of the target axis torque determination unit 151 according to the third embodiment is the same as the function of the target axis torque determination unit 151 according to the first embodiment, duplicate explanations are omitted.

[0109] (5-2) Target operation parameter determination unit 152 Since the function of the target operation parameter determination unit 152 according to the third embodiment is the same as that of the target operation parameter determination unit 152 according to the second embodiment, duplicate explanations are omitted. Note that the target operation 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 operation parameter determination model 142. The target operation parameter determination unit 152 according to the third embodiment uses the target shaft torque determined by the target shaft torque determination model 141 and the sludge information acquired by the sludge information acquisition unit 130b as input data for the target operation parameter determination model 142.

[0110] (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 control unit 160a according to the second embodiment. Therefore, duplicate explanations are omitted.

[0111] (7) Control target priority determination unit 170 Since the function of the control target priority determination unit 170 according to the third embodiment is the same as that of the control target priority determination unit 170 according to the second embodiment, duplicate explanations are omitted.

[0112] <3-3. Input / Output on the Control Panel> The functional configuration of the control panel 100b according to the third embodiment has been described above. Next, with reference to FIG. 10, the input / output on the control panel 100b according to the third embodiment will be described. FIG. 10 is a diagram showing an example of the input / output on the control panel 100b according to the third embodiment. Note that in FIG. 10, the heating dehydrator 50 is a metal filter element type dehydrator, and an example in the case where the operation parameters are the coagulant addition rate, the press-in pressure, and the back pressure closing rate is shown.

[0113] As shown in FIG. 10, the target shaft torque determination model 141 receives the target moisture content and sludge information. The target moisture content is obtained by the target value acquisition unit 120. The sludge information is obtained by the sludge information acquisition unit 130b. The target operation parameter determination model 142 receives the target shaft torque and sludge information. The target shaft torque is determined by the target shaft torque determination model 141. The sludge information is obtained by the sludge information acquisition unit 130b. Based on the input target shaft torque and sludge information, the target operation parameter determination model 142 outputs target operation parameters. The target operation parameters output from the target operation parameter determination model 142 are input to the control target priority determination unit 170. The control target priority determination unit 170 inputs the target operation parameters to the control unit 160b according to the control target priority. The control unit 160b controls the control target according to the input target operation parameters. In addition, the control unit 160b acquires the measured values of the operation parameters measured at each control target after each control, and performs feedback control so that the measured values approach the target operation parameters.

[0114] <3-4. Operation of the control panel> The input and output in the control panel 100b according to the third embodiment have been described above. Subsequently, with reference to FIG. 11, the operation of the control panel 100b according to the third embodiment will be described. FIG. 11 is a flowchart showing an example of the operation of the control panel 100b according to the third embodiment.

[0115] As shown in FIG. 11, first, the target value acquisition unit 120 of the control panel 100b acquires the target moisture content (step S301). For example, the target value acquisition unit 120 acquires the target moisture content from the incineration facility 80.

[0116] Next, the sludge information acquisition unit 130b of the control panel 100b acquires the 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.

[0117] Next, the target axis torque determination unit 151 of the control panel 100b determines the target axis torque (step S303). For example, the target axis torque determination unit 151 determines the target axis torque using the target axis torque determination model 141 stored in the storage unit 140b of the control panel 100b. Specifically, the target axis torque determination unit 151 determines the axis torque output from the target axis torque determination model 141 using the target moisture content acquired by the target value acquisition unit 120 and the sludge information acquired by the sludge information acquisition unit 130b as input data as the target axis torque.

[0118] Next, the target operation parameter determination unit 152 of the control panel 100b determines the target operation parameters (step S304). For example, the target operation parameter determination unit 152 determines the target operation parameters using the target operation parameter determination model 142 stored in the storage unit 140b of the control panel 100b. Specifically, the target operation parameter determination unit 152 determines the operation parameters output from the target operation parameter determination model 142 using the target axis torque determined by the target axis torque determination model 141 and the sludge information acquired by the sludge information acquisition unit 130b as input data as the target operation parameters.

[0119] Next, the control target priority determination unit 170 of the control panel 100b determines the priority for controlling the control targets corresponding to the respective target operation parameters (step S305).

[0120] Next, the control unit 160b of the control panel 100b controls the control targets (step S306). For example, the control unit 160b controls each control target according to the target operation parameters determined by the target operation parameter determination unit 152 according to the priority determined by the control target priority determination unit 170.

[0121] Next, the control unit 160b performs feedback control (step S307). For example, the control unit 160b acquires the measured values measured at each control target after each control, and performs feedback control so that the measured values approach the target operation parameters.

[0122] As described above, the control panel 100b (control device) according to the third embodiment includes a target value acquisition unit 120, a sludge information acquisition unit 130b, a target value determination unit 150b, and a control unit 160b. The target value acquisition unit 120 acquires a first target value related to the control of the heating and dewatering machine 50, which is determined according to the operating state of the incinerator 81 that incinerates the dewatered sludge dewatered by the heating and dewatering machine 50 (sludge dewatering machine). The sludge information acquisition unit 130b acquires sludge information including at least the sludge temperature, which is the temperature of the dewatered sludge. The target value determination unit 150b determines a second target value related to the control of the control target having a correlation with the first target value from the relationship between the acquired first target value and the acquired sludge information. The control unit 160b controls the control target according to the determined second target value.

[0123] With such a configuration, the control panel 100b according to the third embodiment can keep the moisture content of the dewatered sludge discharged from the heating and dewatering machine 50 constant by controlling the operation of the heating and dewatering machine 50 according to the change in the sludge temperature of the sludge in the heating and dewatering machine 50.

[0124] Therefore, the control panel 100b according to the third embodiment can operate the dewatering machine with a stable moisture content even when the sludge temperature changes.

[0125] Further, the control panel 100b according to the third embodiment includes a target shaft torque determination unit 151 that determines the target shaft torque using the target shaft torque determination model 141 and a target operation parameter determination unit 152 that determines the target operation parameters using the target operation parameter determination model 142. Thereby, compared with the control panel 100 according to the first embodiment and the control panel 100a according to the second embodiment, the control panel 100b can control the operation parameters in addition to the control of the shaft torque, so that the moisture content of the dewatered sludge discharged from the heating and dewatering machine 50 can be controlled with higher accuracy.

[0126] <<4. Fourth Embodiment>> The above described the third embodiment. Subsequently, with reference to FIGS. 12 to 14, a fourth embodiment will be described. In the fourth embodiment, when only the target axis torque determination model 141 is used to determine the second target value, an example of readjusting the operation parameters of the control target based on the result of controlling the axis torque by adjusting the operation parameters of the control target will be described. Note that hereinafter, descriptions overlapping with those in the first to third embodiments will be omitted as appropriate.

[0127] <4-1. Configuration of Heating and Dewatering System> Since the configuration of the heating and dewatering system according to the fourth embodiment is the same as that of the heating and dewatering system 1 according to the first embodiment, overlapping descriptions are omitted.

[0128] <4-2. Functional Configuration of Control Panel> The above described the configuration of the heating and dewatering system according to the fourth embodiment. Subsequently, 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 control target priority determination unit 170.

[0129] (1) Communication Unit 110 Since the function of the communication unit 110 according to the fourth embodiment is the same as that of the communication unit 110 according to the first embodiment, overlapping descriptions are omitted.

[0130] (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 that of the target value acquisition unit 120 according to the first embodiment, overlapping descriptions are omitted.

[0131] (3) Sludge Information Acquisition Unit 130 The function of the sludge information acquisition unit 130 according to the fourth embodiment is similar to the function of the sludge information acquisition unit 130 according to the first embodiment, and therefore a duplicated description will be omitted.

[0132] (4) Storage section 140 The function of the storage unit 140 according to the fourth embodiment is similar to the function of the storage unit 140 according to the first embodiment, and therefore a duplicated description will be omitted. As shown in FIG. 12, the storage unit 140 according to the fourth embodiment has a target shaft torque determination model 141.

[0133] (4-1) Target shaft torque determination model 141 The function of the target shaft torque determination model 141 according to the fourth embodiment is similar to the function of the target shaft torque determination model 141 according to the first embodiment, and therefore a duplicated description will be omitted.

[0134] (5) Target value determination unit 150 The function of the target value determination section 150 according to the fourth embodiment is similar to the function of the target value determination section 150 according to the first embodiment, and therefore a duplicated description will be omitted. As shown in FIG. 12, the target value determination unit 150 according to the fourth embodiment includes a target shaft torque determination unit 151.

[0135] (5-1) Target shaft torque determination unit 151 The function of the target shaft torque determination unit 151 according to the fourth embodiment is similar to the function of the target shaft torque determination unit 151 according to the first embodiment, and therefore a duplicated description will be omitted.

[0136] (6) Control unit 160c The control unit 160c has the same functions as the control units in the first to third embodiments, and therefore a duplicated description will be omitted.

[0137] The control unit 160c further has a function of performing feedback control for readjusting the operation parameters of the control target based on the result of control such that the shaft torque of the rotation drive unit 50c becomes the determined target shaft torque by adjusting the operation parameters of the control target. That is, when the shaft torque does not become the target shaft torque by torque control based on the target shaft torque, the control unit 160c performs control to bring the shaft torque closer to the target shaft torque by adjusting the operation parameters by feedback control of the torque control. Thereby, the control unit 160c can shorten the time until the shaft torque becomes the target shaft torque. The control unit 160c performs feedback control, for example, by PID control or model predictive control. The operation parameters controlled by the feedback control of the control unit 160c are, for example, the addition rate of the flocculant, 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 chemical injection rate of the polymer flocculant, and the like.

[0138] (7) Control target priority determination unit 170 Since the function of the control target priority determination unit 170 according to the fourth embodiment is the same as the function of the control target priority determination unit 170 according to the second embodiment, duplicate explanations are omitted. Note that the control target priority determination unit 170 according to the fourth embodiment determines the priority of the control target based on the target operation parameters determined by the control unit 160c.

[0139] <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. Subsequently, with reference to FIG. 13, the input / output in the control panel 100c according to the fourth embodiment will be described. FIG. 13 is a diagram showing an example of the input / output in the control panel 100c according to the fourth embodiment. Note that in FIG. 13, the heating dehydrator 50 is a metal filter medium type dehydrator, and an example in the case where the operation parameters are the addition rate of the flocculant, the injection pressure, and the back pressure closing rate is shown.

[0140] As shown in FIG. 13, the target shaft torque determination model 141 receives the target moisture content and sludge information. The target moisture content is obtained by the target value acquisition unit 120. The sludge information is obtained by the sludge information acquisition unit 130. Based on the input target moisture content of the dewatered sludge and the sludge information, the target shaft torque determination model 141 outputs the target shaft torque in the rotation drive unit 50c of the heating dehydrator 50. The target shaft torque output from the target shaft torque determination model 141 is input to the control unit 160c. Based on at least either the target shaft torque input from the target shaft torque determination model 141 or the shaft torque measured after the control of the control target, the control unit 160c outputs the target operation parameters. The target operation parameters output from the control unit 160c are input to the control target priority determination unit 170. The control target priority determination unit 170 inputs the target operation parameters to the control unit 160c according to the control target priority. The control unit 160c performs torque control by controlling the control target according to the input target operation parameters. The control unit 160c acquires the measured value of the shaft torque after the control of the control target and performs feedback control.

[0141] <4-4. Operation of the control panel> The input and output in the control panel 100c according to the fourth embodiment have been described above. Subsequently, with reference to FIG. 14, the operation of the control panel 100c according to the fourth embodiment will be described. FIG. 14 is a flowchart showing an example of the operation of the control panel 100c according to the fourth embodiment.

[0142] The processes from step S401 to step S403 shown in FIG. 14 are the same as the processes from step S101 to step S103 described with reference to FIG. 4, so the overlapping explanations are omitted.

[0143] After step S403, the control unit 160c of the control panel 100c determines the target operation parameters (step S404). For example, the control unit 160c determines the target operation parameters based on the target shaft torque.

[0144] Next, the control target priority determination unit 170 of the control panel 100c determines the priority for controlling the control targets corresponding to the respective target operation parameters determined by the control unit 160c (step S405).

[0145] Next, the control unit 160c of the control panel 100c controls the control targets (step S406). For example, the control unit 160c controls each control target according to the target operation parameters determined by the control unit 160c in accordance with the priority determined by the control target priority determination unit 170.

[0146] Next, the control unit 160c performs feedback control (step S407). For example, the control unit 160b acquires the measured values measured at each control target after each control, and performs feedback control so that the measured values approach the target shaft torque and the target operation parameters.

[0147] As described above, the control panel 100c (control device) according to the fourth embodiment includes a target value acquisition unit 120, a sludge information acquisition unit 130, a target value determination unit 150, and a control unit 160c. The target value acquisition unit 120 acquires a first target value related to the control of the heating and dewatering machine 50, which is determined according to the operating state of the incinerator 81 that incinerates the dewatered sludge dewatered by the heating and dewatering machine 50 (sludge dewatering machine). The sludge information acquisition unit 130 acquires sludge information including at least the sludge temperature, which is the temperature of the dewatered sludge. The target value determination unit 150 determines a second target value related to the control of the control target having a correlation with the first target value from the relationship between the acquired first target value and the acquired sludge information. The control unit 160c controls the control target according to the determined second target value.

[0148] With such a configuration, the control panel 100c according to the fourth embodiment can keep the moisture content of the dewatered sludge discharged from the heating and dewatering machine 50 constant by controlling the operation of the heating and dewatering machine 50 according to the change in the sludge temperature of the sludge in the heating and dewatering machine 50.

[0149] Therefore, the control panel 100c according to the fourth embodiment enables the dehydrator to operate at a stable moisture content even when the sludge temperature changes.

[0150] Also, 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 operation 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 until the shaft torque reaches the target shaft torque by readjusting the operation parameters based on the measured value of the shaft torque after torque control.

[0151] <<5. Fifth Embodiment>> The fourth embodiment has been described above. Subsequently, with reference to FIGS. 15 to 17, the fifth embodiment will be described. In the fifth embodiment, an example of readjusting (correcting) the operation parameters of the control target based on the result of controlling the shaft torque by adjusting the operation parameters of the control target when only the target operation parameter determination model 142 is used to determine the second target value will be described. Note that hereinafter, descriptions overlapping with those in the first to fourth embodiments will be omitted as appropriate.

[0152] <5-1. Configuration of the Heating and Dehydration System> Since the configuration of the heating and dehydration system according to the fifth embodiment is the same as that of the heating and dehydration system 1 according to the first embodiment, duplicate descriptions will be omitted.

[0153] <5-2. Functional Configuration of the Control Panel> The configuration of the heating and dehydration system according to the fifth embodiment has been described above. Subsequently, 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 the control panel 100d according to the fifth embodiment. As shown in FIG. 15, the control panel 100d includes a communication unit 110, a target value acquisition unit 120d, a sludge information acquisition unit 130, a storage unit 140d, a target value determination unit 150d, a control unit 160d, and a control target priority determination unit 170.

[0154] (1) Communication unit 110 Since the function of the communication unit 110 according to the fifth embodiment is the same as that of the communication unit 110 according to the first embodiment, duplicate explanations are omitted.

[0155] (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 that of the target value acquisition unit 120a according to the second embodiment, duplicate explanations are omitted.

[0156] (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 that of the sludge information acquisition unit 130 according to the first embodiment, duplicate explanations are omitted.

[0157] (4) Storage unit 140d Since the function of the storage unit 140d according to the fifth embodiment is the same as that of the storage unit 140 according to the first embodiment, duplicate explanations are omitted. As shown in FIG. 15, the storage unit 140d according to the fifth embodiment has a target operation parameter determination model 142.

[0158] (4-1) Target operation parameter determination model 142 Since the function of the target operation parameter determination model 142 according to the fifth embodiment is the same as that of the target operation parameter determination model 142 according to the second embodiment, duplicate explanations are omitted.

[0159] (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 that of the target value determination unit 150a according to the second embodiment, duplicate explanations are omitted. As shown in FIG. 15, the target value determination unit 150d according to the fifth embodiment includes a target operation parameter determination unit 152.

[0160] (5-1) Target operation parameter determination unit 152 The function of the target operation parameter determination unit 152 according to the fifth embodiment is the same as that of the target operation parameter determination unit 152 according to the second embodiment, so overlapping explanations are omitted.

[0161] (6) Control unit 160d Since the control unit 160d has the same functions as those of the control units in the first to fourth embodiments, overlapping explanations are omitted. The control unit 160d further has a function of performing feedback control for adjusting (correcting) the target operation parameters determined by the target operation parameter determination model 142 based on the control result of the control target according to the target shaft torque. That is, when the shaft torque does not become the target shaft torque by the torque control based on the target shaft torque, the control unit 160d performs control to bring the shaft torque closer to the target shaft torque by adjusting the operation parameters by the feedback control of the torque control. Thereby, the control unit 160d can shorten the time until the shaft torque becomes the target shaft torque. The control unit 160d performs feedback control by, for example, PID control or model predictive control. The operation parameters controlled by the feedback control of the control unit 160d are, for example, the addition rate of the flocculant, 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 chemical injection rate of the polymer flocculant, and the like.

[0162] (7) Control target priority determination unit 170 The function of the control target priority determination unit 170 according to the fifth embodiment is the same as that of the control target priority determination unit 170 according to the second embodiment, so overlapping explanations are omitted. Note that the control target priority determination unit 170 according to the fifth embodiment determines the priority of the control target based on the target operation parameters after the target operation parameters determined by the target operation parameter determination model 142 are corrected by the control unit 160d.

[0163] <5-3. Input and output on the control panel> The functional configuration of the control panel 100d according to the fifth embodiment has been described above. Subsequently, with reference to FIG. 16, the input / output in the control panel 100d according to the fifth embodiment will be described. FIG. 16 is a diagram showing an example of the input / output in the control panel 100d according to the fifth embodiment. Note that in FIG. 16, an example is shown in which the heating and dehydrating machine 50 is a metal filter medium type dehydrating machine and the operation parameters are the coagulant addition rate, the press-in pressure, and the back pressure closing rate.

[0164] As shown in FIG. 16, the control unit 160d controls the torque of the control target (torque control) according to the input target shaft torque. The target operation parameter determination model 142 receives the target shaft torque and sludge information as inputs. The target shaft torque is obtained by the target value acquisition unit 120d. The sludge information is obtained by the sludge information acquisition unit 130. The target operation parameter determination model 142 outputs target operation parameters based on the input target shaft torque and sludge information. The control unit 160d acquires the measured value of the shaft torque after control of the control target and performs feedback control. The control unit 160d obtains a correction value for correcting the target operation parameters determined by the target operation parameter determination model 142 by means of the feedback control. The control unit 160d inputs the target operation parameters corrected by the obtained correction value to the control target priority determination unit 170. The control target priority determination unit 170 inputs the target operation parameters to the control unit 160d according to the control target priority. The control unit 160d controls the control target according to the input target shaft torque and target operation parameters. The control unit 160d acquires the measured value of the shaft torque after control of the control target and performs feedback control.

[0165] <5-4. Operation of the control panel> The input / output in the control panel 100d according to the fifth embodiment has been described above. Subsequently, with reference to FIG. 17, the operation of the control panel 100d according to the fifth embodiment will be described. FIG. 17 is a flowchart showing an example of the operation of the control panel 100d according to the fifth embodiment.

[0166] 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, so duplicate explanations are omitted.

[0167] 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, so duplicate explanations are omitted.

[0168] Next, the control unit 160d corrects the target operation parameter (step S507). For example, the control unit 160d obtains a correction value of the target operation parameter determined by the target operation parameter determination model 142 by feedback control. The control unit 160d corrects the target operation parameter with the obtained correction value. Then, the control unit 160d inputs the corrected target operation parameter to the control target priority determination unit 170.

[0169] As described above, the control panel 100d (control device) according to the fifth embodiment includes a target value acquisition unit 120d, a sludge information acquisition unit 130, a target value determination unit 150d, and a control unit 160d. The target value acquisition unit 120d acquires a first target value related to the control of the heating and dehydration machine 50, which is determined according to the operating state of the incinerator 81 that incinerates the dehydrated sludge dehydrated by the heating and dehydration machine 50 (sludge dehydrator). 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 the control of the control target having a correlation with the first target value from the relationship between the acquired first target value and the acquired sludge information. The control unit 160d controls the control target according to the determined second target value.

[0170] With such a configuration, the control panel 100d according to the fifth embodiment can keep the moisture content of the dehydrated sludge discharged from the heating and dehydration machine 50 constant by controlling the operation of the heating and dehydration machine 50 according to the change in the sludge temperature of the sludge in the heating and dehydration machine 50.

[0171] Therefore, the control panel 100d according to the fifth embodiment enables the dehydrator to be operated at a stable water content even when the sludge temperature changes.

[0172] In addition, the control unit 160d of the control panel 100d according to the fifth embodiment corrects the target operation parameter determined by the target operation parameter determination model 142 based on the result of the feedback control of the torque control. As a result, the control panel 100d can shorten the time until the shaft torque reaches the target shaft torque by torque control and perform torque control with higher accuracy.

[0173] <<6. Sixth Embodiment>> As described above, the fifth embodiment has been described. Subsequently, with reference to FIGS. 18 to 20, the sixth embodiment will be described. In the sixth embodiment, when the target axis torque determination model 141 and the target operation parameter determination model 142 are used to determine the second target value, an example of readjusting (correcting) the operation parameter of the control target based on the result of controlling the axis torque by adjusting the operation parameter of the control target will be described. Note that hereinafter, descriptions overlapping with those in the first to fifth embodiments will be omitted as appropriate.

[0174] [[ID=1'style='color:red;'>15]] <6-1. Configuration of Heating and Dehydration System> Since the configuration of the heating and dehydration system according to the sixth embodiment is the same as the configuration of the heating and dehydration system 1 according to the first embodiment, overlapping descriptions are omitted.

[0175] <6-2. Functional Configuration of Control Panel> As described above, the configuration of the heating and dehydration system according to the sixth embodiment has been described. Subsequently, 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 the control panel 100e according to the sixth embodiment. As shown in FIG. 18, the control panel 100e includes a communication unit 110, a target value acquisition unit 120, a sludge information acquisition unit 130e, a storage unit 140e, a target value determination unit 150e, a control unit 160e, and a control target priority determination unit 170.

[0176] (1) Communication unit 110 Since the function of the communication unit 110 according to the sixth embodiment is the same as that of the communication unit 110 according to the first embodiment, duplicate explanations are omitted.

[0177] (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 that of the target value acquisition unit 120 according to the first embodiment, duplicate explanations are omitted.

[0178] (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 that of the sludge information acquisition unit 130b according to the third embodiment, duplicate explanations are omitted.

[0179] (4) Storage unit 140e Since the function of the storage unit 140e according to the sixth embodiment is the same as that of the storage unit 140b according to the third embodiment, duplicate explanations are omitted. As shown in FIG. 18, the storage unit 140e according to the sixth embodiment has a target axis torque determination model 141 and a target operation parameter determination model 142.

[0180] (4-1) Target axis torque determination model 141 Since the function of the target axis torque determination model 141 according to the sixth embodiment is the same as that of the target axis torque determination model 141 according to the third embodiment, duplicate explanations are omitted.

[0181] (4-2) Target operation parameter determination model 142 Since the function of the target operation parameter determination model 142 according to the sixth embodiment is the same as that of the target operation parameter determination model 142 according to the third embodiment, duplicate explanations are omitted.

[0182] (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 that of the target value determination unit 150b according to the third embodiment, duplicate explanations are omitted. As shown in FIG. 18, the target value determination unit 150e according to the sixth embodiment includes a target axis torque determination unit 151 and a target operation parameter determination unit 152.

[0183] (5-1) Target axis torque determination unit 151 Since the function of the target axis torque determination unit 151 according to the sixth embodiment is the same as that of the target axis torque determination unit 151 according to the third embodiment, duplicate explanations are omitted.

[0184] (5-2) Target operation parameter determination unit 152 Since the function of the target operation parameter determination unit 152 according to the sixth embodiment is the same as that of the target operation parameter determination unit 152 according to the third embodiment, duplicate explanations are omitted.

[0185] (6) Control unit 160e Since the control unit 160e has the same functions as the control units of the first to fifth embodiments, duplicate explanations are omitted. The control unit 160e further has a function of performing feedback control for adjusting (correcting) the target operation parameters determined by the target operation parameter determination model 142 based on the control result of the control target according to the target axis torque. That is, when the axis torque does not become the target axis torque by the torque control based on the target axis torque, the control unit 160e adjusts the operation parameters by the feedback control of the torque control to perform control to bring the axis torque closer to the target axis torque. Thereby, the control unit 160e can shorten the time until the axis torque becomes the target axis torque. The control unit 160e performs feedback control by, for example, PID control or model predictive control. The operating parameters controlled by the feedback control of the control unit 160e are, for example, the coagulant addition rate, 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 coagulant injection rate, and the like.

[0186] (7) Control target priority determination unit 170 Since the function of the control target priority determination unit 170 according to the sixth embodiment is the same as the function of the control target priority determination unit 170 according to the second embodiment, overlapping explanations are omitted. Note that the control target priority determination unit 170 according to the sixth embodiment determines the priority of the control target based on the target operating parameter after the target operating parameter determined by the target operating parameter determination model 142 is corrected by the control unit 160e.

[0187] <6-3. Input and output on 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, the input and output on the control panel 100e according to the sixth embodiment will be described. FIG. 19 is a diagram showing an example of the input and output on the control panel 100e according to the sixth embodiment. Note that in FIG. 19, the heating and dehydrating machine 50 is a metal filter medium type dehydrating machine, and an example in the case where the operating parameters are the coagulant addition rate, the injection pressure, and the back pressure closing rate is shown.

[0188] As shown in FIG. 19, the target shaft torque determination model 141 receives the target moisture content and the sludge information as inputs. The target moisture content is obtained by the target value acquisition unit 120. The sludge information is obtained by the sludge information acquisition unit 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 160e and the target operating parameter determination model 142. The control unit 160e controls the torque of the control target (torque control) according to the input target shaft torque. The target operation parameter determination model 142 receives the target shaft torque and sludge information as inputs. The target shaft torque is determined by the target shaft torque determination model 141. The sludge information is acquired by the sludge information acquisition unit 130e. The target operation parameter determination model 142 outputs target operation parameters based on the input target shaft torque and sludge information. The control unit 160e acquires the measured value of the shaft torque after control of the control target and performs feedback control. The control unit 160e obtains a correction value for correcting the target operation parameters determined by the target operation parameter determination model 142 through the feedback control. The control unit 160e inputs the target operation parameters corrected with the obtained correction value to the control target priority determination unit 170. The control target priority determination unit 170 inputs the target operation parameters to the control unit 160e according to the control target priority. The control unit 160e controls the control target according to the input target shaft torque and target operation parameters. The control unit 160e acquires the measured value of the shaft torque after control of the control target and performs feedback control.

[0189] <6-4. Operation of the control panel> The input and output in the control panel 100e according to the sixth embodiment have been described above. Subsequently, with reference to FIG. 20, the operation of the control panel 100e according to the sixth embodiment will be described. FIG. 20 is a flowchart showing an example of the operation of the control panel 100e according to the sixth embodiment.

[0190] The processes from step S601 to step S603 shown in FIG. 20 are the same as the processes from step S101 to step S103 described with reference to FIG. 4, so duplicate explanations are omitted. The processes from step S604 to step S608 shown in FIG. 2 are the same as the processes from step S503 to step S507 described with reference to FIG. 17, so duplicate explanations are omitted.

[0191] As described above, the control panel 100e (control device) according to the sixth embodiment includes a target value acquisition unit 120, a sludge information acquisition unit 130e, a target value determination unit 150e, and a control unit 160e. The target value acquisition unit 120 acquires a first target value related to the control of the heating and dewatering machine 50, which is determined according to the operating state of the incinerator 81 that incinerates the dewatered sludge dewatered by the heating and dewatering machine 50 (sludge dewatering machine). The sludge information acquisition unit 130e acquires sludge information including at least the sludge temperature, which is the temperature of the dewatered sludge. The target value determination unit 150e determines a second target value related to the control of the control target having a correlation with the first target value from the relationship between the acquired first target value and the acquired sludge information. The control unit 160e controls the control target according to the determined second target value.

[0192] With such a configuration, the control panel 100e according to the sixth embodiment can keep the moisture content of the dewatered sludge discharged from the heating and dewatering machine 50 constant by controlling the operation of the heating and dewatering machine 50 according to the change in the sludge temperature of the sludge in the heating and dewatering machine 50.

[0193] Therefore, the control panel 100e according to the sixth embodiment can operate the dewatering machine with a stable moisture content even when the sludge temperature changes.

[0194] Also, the control unit 160d of the control panel 100e according to the sixth embodiment corrects the target operation parameter determined by the target operation parameter determination model 142 based on the target axis torque determined by the target axis torque determination model 141 according to the result of the feedback control of the torque control. Thereby, the control panel 100e can shorten the time until the shaft torque reaches the target axis torque by torque control and perform torque control with higher accuracy.

[0195] The embodiments of the present invention have been described above. Note that part or all of the control panels 100 and 100a to 100e (control devices) in the above-described embodiments may be implemented by a computer. In that case, a program for realizing this function may be recorded on a computer-readable recording medium, and the program recorded on this recording medium may be read into a computer system and executed to realize it. Here, the "computer system" is assumed to include hardware such as an OS and peripheral devices. Also, the "computer-readable recording medium" refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, a CD-ROM, etc., and a storage device such as a hard disk incorporated in a computer system. Furthermore, the "computer-readable recording medium" refers to something that dynamically holds a program for a short 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, and may also include something that holds a program for a certain period of time, like a volatile memory inside a computer system that serves as a server or a client in that case. Also, the above program may be for realizing a part of the aforementioned functions, and may further be realizable in combination with a program already recorded in the computer system for the aforementioned functions, and may also be realized using a programmable logic device such as an FPGA (Field Programmable Gate Array).

[0196] As described above, the embodiments of this invention have been explained in detail with reference to the drawings. However, the specific configuration is not limited to the above, and various design changes and the like can be made without departing from the gist of this invention.

Explanation of Reference Numerals

[0197] 1… Heating and dehydration system, 10… Aggregation device, 20… Concentration device, 30… Concentrated sludge supply pump, 40… Flocculant supply pump, 45… Flocculant flow meter, 48… Injection pressure sensor, 50… Heating and 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… Rotation drive section, 50C… Substrate, 50d… Ribbon screw, 50D… Cover, 50e… Connecting 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… Thermometer, 55… Dewatered sludge hopper, 60… Heat medium supply pump, 65… Heat medium flow meter, 70… Dewatered sludge supply pump, 78… Sludge flow meter, 81… Incinerator, 82… Boiler, 83… Flue gas treatment tower, 100, 100a~100e… Control panel, 110… Communication section, 120… Target value acquisition section, 120a, 120b… Target value acquisition section, 130, 130a, 130b, 130e… Sludge information acquisition section, 140, 140a, 140b, 140d, 140e… Memory section, 141… Target shaft torque determination model, 142… Target operation parameter determination model, 150, 150a, 150b, 150d, 150e… Target value determination section, 151… Target shaft torque determination section, 152… Target operation parameter determination section, 160, 160a~160e… Control section, 170… Control target priority determination section

Claims

1. A target value acquisition unit that acquires, as a first target value related to the control of the sludge dehydrator, either a target water content rate indicating a target value of the water content rate of the dewatered sludge desired to be incinerated in an incinerator that incinerates the dewatered sludge dehydrated by the sludge dehydrator, or a target shaft torque indicating a target value of the shaft torque of the rotational drive unit of the sludge dehydrator necessary to obtain the dewatered sludge having a desired water content rate in the incinerator; A sludge information acquisition unit that acquires sludge information that is information indicating a factor affecting the correlation between the water content rate and the shaft torque in the operation of the sludge dehydrator and includes at least the sludge temperature, which is the temperature of the dewatered sludge; A target value determination unit including at least one of a target shaft torque determination unit that determines, as a second target value related to the control of a control target, the target shaft torque that is in a correlation with the water content rate based on the target water content rate and the sludge information when the acquired first target value is the target water content rate, or a target operation parameter determination unit that determines, as the second target value, a target value of an operation parameter other than the shaft torque that is in a correlation with the shaft torque in the operation of the sludge dehydrator based on the target shaft torque and the sludge information when the acquired first target value is the target shaft torque; A control unit that controls the control target according to the determined second target value; Comprising: The control target is at least one of a controllable part of the sludge dehydrator or a pump that controls the supply to the sludge dehydrator, which requires control according to the first target value and the sludge information. A control device.

2. The target value determination unit includes only the target shaft torque determination unit. The target value acquisition unit acquires the target water content rate. The target shaft torque determination unit determines the target shaft torque from the relationship between the acquired target water content rate and the acquired sludge information. The control device according to Claim 1.

3. The control unit performs feedback control for adjusting the operation parameters of the sludge dehydrator based on the result of being controlled such that the shaft torque of the rotational drive unit becomes the determined target shaft torque. The control device according to Claim 2.

4. The control unit adjusts the addition rate of the flocculant injected into the sludge dehydrated by the sludge dehydrator as the operation parameter. The control device according to Claim 3.

5. The control unit performs the feedback control by model predictive control. The control device according to claim 3 or claim 4.

6. The target value determination unit includes only the target operation parameter determination unit, The target value acquisition unit acquires the target shaft torque, The target operation parameter determination unit determines the target operation parameter from the relationship between the acquired target shaft torque and the acquired sludge information, The control device according to claim 1.

7. The control unit performs feedback control for adjusting the determined target operation parameter based on the control result of the control target according to the acquired target shaft torque, The control device according to claim 6.

8. The target value determination unit includes the target shaft torque determination unit and the target operation parameter determination unit, The target value acquisition 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 operation parameter determination unit determines the target operation parameter from the relationship between the determined target shaft torque and the acquired sludge information, The control device according to claim 1.

9. The target operation parameter determination unit determines, as the target operation parameter, the target value of the addition rate of the flocculant injected into the sludge dewatered by the sludge dehydrator, The control device according to claim 8.

10. The control unit performs feedback control for adjusting the determined target operation parameter based on the control result of the control target according to the determined target shaft torque, The control device according to claim 8 or claim 9.

11. The control unit adjusts the addition rate of the flocculant injected into the sludge dewatered by the sludge dehydrator as the determined target operation parameter, The control device according to claim 10.

12. The control unit performs the feedback control by model predictive control, The control device according to claim 10 or claim 11.

13. 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, The control device according to any one of claims 1 to 5 and claims 8 to 12.

14. The target operation parameter determination unit determines the target operation parameters by using a learned model obtained by machine learning the relationship between the shaft torque of the rotary drive unit and the sludge information and operation parameters of the dewatered sludge. The control device according to any one of claims 1 and 6 to 13.

15. When there are a plurality of the determined target operation parameters, a control target priority determination unit that determines the priority of controlling the control targets corresponding to the respective target operation parameters. The control device according to any one of claims 6 to 9, further comprising:

16. A heating and dewatering system including the control device according to any one of claims 1 to 15.

17. A target value acquisition process in which a target value acquisition unit acquires, as a first target value related to the control of the sludge dehydrator, either a target water content indicating a target value of the water content of the dewatered sludge desired in an incinerator that incinerates the dewatered sludge dewatered by the sludge dehydrator, or a target shaft torque indicating a target value of the shaft torque of the rotary drive unit of the sludge dehydrator necessary to obtain the dewatered sludge having a desired water content in the incinerator; A sludge information acquisition process in which a sludge information acquisition unit acquires sludge information including at least a sludge temperature, which is information indicating a factor that affects the correlation between the water content and the shaft torque in the operation of the sludge dehydrator; A target value determination process including at least one of a target shaft torque determination process in which, when the acquired first target value is the target water content, a target shaft torque determination unit determines, based on the target water content and the sludge information, a target shaft torque that is in a correlation relationship with the water content, as a second target value related to the control of the control target, or a target operation parameter determination process in which, when the acquired first target value is the target shaft torque, a target operation parameter determination unit determines, based on the target shaft torque and the sludge information, a target value of an operation parameter other than the shaft torque that is in a correlation relationship with the shaft torque in the operation of the sludge dehydrator, as the second target value; A control process in which a control unit controls the control target according to the determined second target value; Including The control target is at least one of a controllable part of the sludge dehydrator or a pump that controls the supply to the sludge dehydrator, which requires control according to the first target value and the sludge information. Control method.

18. A computer, A target value acquisition means for acquiring, as a first target value related to the control of the sludge dehydrator, either a target water content indicating a target value of the water content of the dehydrated sludge desired to be incinerated in an incinerator that incinerates the dehydrated sludge dehydrated by the sludge dehydrator, or a target shaft torque indicating a target value of the shaft torque of the rotational drive unit of the sludge dehydrator necessary to obtain the dehydrated sludge having the desired water content in the incinerator; Sludge information acquisition means for acquiring sludge information which is information indicating a factor that affects the correlation between the water content and the shaft torque in the operation of the sludge dehydrator and includes at least the sludge temperature which is the temperature of the dehydrated sludge; A target value determination means that functions as at least one of a target shaft torque determination means for determining, as a second target value related to the control of a control target, the target shaft torque that is in a correlation with the water content based on the target water content and the sludge information when the acquired first target value is the target water content, or a target operation parameter determination means for determining, as the second target value, a target value of an operation parameter other than the shaft torque that is in a correlation with the shaft torque in the operation of the sludge dehydrator based on the target shaft torque and the sludge information when the acquired first target value is the target shaft torque; Control means for controlling the control target according to the determined second target value; Function as, The control target is at least one of a controllable part of the sludge dehydrator that requires control according to the first target value and the sludge information, or a pump that controls the supply to the sludge dehydrator. Program.

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