Manufacturing control device and manufacturing control method

Abstract

To provide a production control device and a production control method capable of suppressing the number of production devices for producing powder activated carbon.SOLUTION: Based on first correspondence information indicating a correspondence relationship between an injection amount of the powdered activated carbon and a particle diameter of the powdered activated carbon required to reduce the first concentration of the odor substance contained in the water to be treated to the second concentration, and second correspondence information indicating a correspondence relationship between a production amount of the powdered activated carbon in a production apparatus that produces the powdered activated carbon and the particle diameter of the powdered activated carbon, the control device includes a first calculation unit configured to calculate a first particle size of the powder activated carbon in a case where the injection amount and the production amount satisfy a predetermined condition, a second calculation unit configured to calculate a first supply amount of the activated carbon corresponding to the first particle size calculated by the first calculation unit based on third correspondence information indicating a correspondence relationship between the supply amount of the activated carbon to the production device and the particle size of the powder activated carbon, and a supply control unit configured to perform control so that the activated carbon corresponding to the first supply amount calculated by the second calculation unit is supplied to the production device.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a manufacturing control device and a manufacturing control method. [Background technology]

[0002] In water purification plants, for example, water purification equipment is installed to perform various operations on raw water (hereinafter also referred to as water to be treated), such as river water, well water, etc. Specifically, in such water purification equipment, for example, powdered activated carbon is injected into the water to be treated to remove odorous substances contained in the water to be treated (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-288309 Summary of the Invention [Problem to be solved by the invention]

[0004] In the water purification facilities described above, it is desirable to reduce the number of production devices that produce powdered activated carbon by pulverizing activated carbon, for example. [Means for solving the problem]

[0005] The production control device according to the present disclosure is a production control device that controls the production of powdered activated carbon by pulverizing activated carbon, and includes: a first calculation unit that calculates a first particle size of the powdered activated carbon when the injection amount and the production amount satisfy a predetermined condition, based on first correspondence information that indicates a correspondence relationship between an injection amount of the powdered activated carbon required to reduce a first concentration of odorous substances contained in water to be treated to a second concentration and the particle size of the powdered activated carbon, and second correspondence information that indicates a correspondence relationship between a production amount of the powdered activated carbon in a production device that produces the powdered activated carbon and the particle size of the powdered activated carbon; a second calculation unit that calculates a first supply amount of the activated carbon corresponding to the first particle size calculated by the first calculation unit, based on third correspondence information that indicates a correspondence relationship between a supply amount of the activated carbon to the production device and the particle size of the powdered activated carbon; and a supply control unit that controls the supply of the activated carbon to the production device to correspond to the first supply amount calculated by the second calculation unit. [Effects of the Invention]

[0006] According to the production control device and production control method of the present disclosure, it is possible to reduce the number of production devices for producing powdered activated carbon. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a diagram illustrating a configuration diagram of a water treatment system 100 according to the first embodiment. [Figure 2] FIG. 2 is a diagram showing the correspondence relationship between the particle size of powdered activated carbon and the amount of activated carbon slurry supplied to the pulverizer 5. As shown in FIG. [Figure 3] FIG. 3 is a diagram illustrating the hardware configuration of the control device 10. As shown in FIG. [Figure 4] FIG. 4 is a flowchart illustrating the manufacturing control process according to the first embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. However, such descriptions should not be interpreted in a limiting sense, and do not limit the subject matter described in the claims. Furthermore, various changes, substitutions, and modifications can be made without departing from the spirit and scope of the present disclosure. Furthermore, different embodiments can be combined as appropriate.

[0009] [Water treatment system 100 according to the first embodiment] First, a configuration example of a water treatment system 100 according to the first embodiment will be described. Fig. 1 is a diagram illustrating a configuration diagram of a water treatment system 100 according to the first embodiment. Note that the positions and numbers of pumps and lines (pipes) in the following example are merely examples and are not limited to these.

[0010] The water treatment system 100 is, for example, a water purification system installed in a water purification plant.

[0011] Specifically, the water treatment system 100 includes, for example, a contact basin 1, a mixing basin 2, a flocculation basin 3, an activated carbon dissolution tank 4, a pulverizer 5 (hereinafter also referred to as the manufacturing device 5), a flocculant storage tank 6, a pump P1, a pump P2, a pump P3, a pump P11, and a pump P12.

[0012] Although the following description will be given of a case where the water treatment system 100 has one pulverizer 5, the water treatment system 100 may have a plurality of pulverizers 5, for example.

[0013] The pump P1 is disposed, for example, on a line L1 that connects a receiving well (not shown) and the contactor basin 1. The pump P1 supplies the water to be treated from the receiving well to the contactor basin 1, for example.

[0014] The activated carbon dissolving tank 4 stores, for example, a slurry (hereinafter also referred to as activated carbon slurry) produced by dissolving activated carbon in water.

[0015] The pulverizer 5 pulverizes the activated carbon contained in the activated carbon slurry supplied from the activated carbon dissolving tank 4, for example, to produce a slurry containing powdered activated carbon (hereinafter also referred to as powdered activated carbon slurry).

[0016] The pump P11 is disposed, for example, on a line L11 that connects the activated carbon dissolution tank 4 and the pulverizer 5. The pump P11 supplies the activated carbon slurry supplied from the activated carbon dissolution tank 4 via the line L11 to the pulverizer 5, and further supplies the powdered activated carbon slurry supplied from the pulverizer 5 via the line L12 to the contactor basin 1, thereby injecting the powdered activated carbon slurry into the water to be treated stored in the contactor basin 1.

[0017] The following description will be given assuming that the powdered activated carbon slurry is injected into the water to be treated in contactor basin 1, but this is not limiting. Specifically, the powdered activated carbon slurry may be injected into the water to be treated in equipment upstream of contactor basin 1 (e.g., line L1).

[0018] In the following, a case will be described in which the powdered activated carbon slurry supplied from the pulverizer 5 is directly supplied to the contact basin 1, but the present invention is not limited to this. Specifically, between the pulverizer 5 and the contact basin 1 on the line L12, for example, another storage tank (not shown) for temporarily storing the powdered activated carbon slurry supplied from the pulverizer 5 and another pump (not shown) for supplying the powdered activated carbon slurry stored in the storage tank to the contact basin 1 may be provided. The powdered activated carbon slurry supplied from the pulverizer 5 via the line L12 may be temporarily stored in the other storage tank and then supplied to the contact basin 1 by the other pump.

[0019] Contactor basin 1 brings the water to be treated, supplied via line L1, into contact with a powdered activated carbon slurry supplied via line L12. Contactor basin 1 then supplies the water to be treated after contact with the powdered activated carbon slurry to mixing basin 2 via line L2, which connects contactor basin 1 and mixing basin 2.

[0020] The pump P2 is disposed, for example, on the line L2, and supplies the water to be treated (the water to be treated after being contacted with the powdered activated carbon slurry) from the contactor basin 1 to the mixing basin 2, for example.

[0021] The pump P12 is disposed, for example, on a line L13 that connects the flocculant storage tank 6, which stores a flocculant, with the mixing basin 2. The pump P12 then injects the flocculant into the water to be treated that is stored in the mixing basin 2, for example, by supplying the flocculant stored in the flocculant storage tank 6 to the mixing basin 2.

[0022] The following description will be given assuming that the coagulant is injected into the water to be treated in the mixing basin 2, but this is not limiting. Specifically, the coagulant may be injected into the water to be treated in equipment upstream of the mixing basin 2 (e.g., line L2).

[0023] The mixing basin 2, for example, agitates the water to be treated supplied via line L2 and the flocculant supplied via line L13. The mixing basin 2 then supplies the agitated water to the flocculation basin 3 via line L3, which connects the mixing basin 2 and the flocculation basin 3.

[0024] The pump P3 is disposed, for example, on the line L3, and supplies the water to be treated (the water to be treated after being agitated in the mixing basin 2) from the mixing basin 2 to the flocculation basin 3, for example.

[0025] The flocculation basin 3 forms flocs by coagulating suspended solids contained in the water to be treated supplied via line L3, for example. The flocculation basin 3 then supplies the water to be treated after flocculation to downstream equipment via line L4, which connects the flocculation basin 3 with downstream equipment (for example, a sedimentation basin that separates flocs from the water to be treated by settling them).

[0026] In the above example, the contact basin 1, mixing basin 2, and other facilities are connected by lines, and the treated water is transported between the facilities by pumps installed on the lines. However, this is not limiting. Specifically, the treated water may be transported between the facilities by gravity, for example, without using lines or pumps.

[0027] The control device 10 controls the amount of activated carbon slurry supplied to the pulverizer 5, for example, to thereby control the amount of powdered activated carbon produced in the pulverizer 5 (hereinafter also referred to as production control process).

[0028] Specifically, the control device 10 calculates a first particle size of the powdered activated carbon when the first injection amount and the first production amount satisfy a predetermined condition, based on information indicating a correspondence relationship between the injection amount (hereinafter also referred to as the first injection amount) of powdered activated carbon (powdered activated carbon containing powdered activated carbon slurry) required to reduce a first concentration of odorous substances contained in the water to be treated to a second concentration and the particle size of the powdered activated carbon (hereinafter also referred to as the first correspondence information), and information indicating a correspondence relationship between the production amount (hereinafter also referred to as the first production amount) of the powdered activated carbon in the pulverizer 5 and the particle size of the powdered activated carbon (hereinafter also referred to as the second correspondence information). Examples of odorous substances include 2-methylisoborneol (2-MIB) and geosmin. The first concentration is, for example, a measured value of the concentration of the odorous substances contained in the water to be treated. The second concentration is, for example, a target value of the concentration of the odorous substances contained in the water to be treated. Further, the predetermined condition is, for example, that the first injection amount per unit time and the first production amount per unit time are the same, or that the difference between the first injection amount per unit time and the first production amount per unit time is within a predetermined range.

[0029] Then, the control device 10 calculates the supply amount of activated carbon slurry (hereinafter also referred to as the first supply amount) corresponding to the calculated first particle size, for example, based on information (hereinafter also referred to as the third correspondence information) indicating the correspondence relationship between the supply amount of activated carbon slurry to the pulverizers 5 (supply amount per pulverizer) and the particle size of the powdered activated carbon.

[0030] Thereafter, the control device 10 controls the pump P11 so that the activated carbon slurry corresponding to the calculated first supply amount is supplied to the pulverizer 5, for example.

[0031] 2, the particle size of the powdered activated carbon produced in the pulverizer 5 (hereinafter also referred to as the particle size after pulverization) increases as the amount of activated carbon slurry supplied to the pulverizer 5 (hereinafter also referred to as the pulverization flow rate) increases due to performance constraints of the pulverizer 5. The adsorption performance of the powdered activated carbon (performance of removing odorous substances contained in the water to be treated) decreases, for example, as the particle size of the powdered activated carbon increases.

[0032] Therefore, in the control device 10 of this embodiment, when the first concentration exceeds a predetermined threshold, for example, an increase in the particle size of the powdered activated carbon produced in the pulverizer 5 (a decrease in the adsorption performance of each powdered activated carbon) is permitted, while the amount of powdered activated carbon supplied to the water to be treated (amount of activated carbon supplied to the pulverizer 5) is increased, thereby suppressing a decrease in the amount of removed odorous substances contained in the water to be treated (a decrease in the overall adsorption performance of the powdered activated carbon supplied to the water to be treated).

[0033] In this regard, in the water treatment system, for example, by preparing in advance a number of pulverizers 5 that can sufficiently treat water to be treated even when the water to be treated has a previously estimated maximum concentration of odorous substances (first concentration), it is possible to sufficiently remove odorous substances contained in the water to be treated while suppressing an increase in the particle size of the powdered activated carbon produced by each pulverizer 5.

[0034] In other words, in the water treatment system, for example, by preparing a sufficient number of pulverizers 5 in advance, it becomes possible to keep the amount of activated carbon supplied to each pulverizer 5 constant, and further, it becomes possible to fix the particle size of the powdered activated carbon produced by each pulverizer 5. Therefore, in this case, in the water treatment system, for example, by adjusting the amount of powdered activated carbon supplied to the water to be treated from a storage tank (not shown) that temporarily stores the powdered activated carbon (powdered activated carbon supplied from the pulverizers 5) according to the first concentration, it becomes possible to sufficiently remove odorous substances contained in the water to be treated.

[0035] However, in this case, for example, in the water treatment system, there will be pulverizers 5 that do not need to be operated during times when the first concentration is not elevated (i.e., during normal operation), which will reduce the availability of the pulverizers 5. Furthermore, in this case, for example, the costs required for introducing and maintaining each pulverizer 5 will increase in the water treatment system.

[0036] In contrast to this, the control device 10 in this embodiment, as described above, allows an increase in the particle size of the powdered activated carbon produced in the pulverizer 5, while increasing the amount of powdered activated carbon supplied to the water to be treated, thereby suppressing a decrease in the amount of removed odorous substances contained in the water to be treated.

[0037] As a result, water treatment system 100 in this embodiment can stably remove odorous substances contained in the water to be treated while, for example, reducing the number of pulverizers 5 that manufacture powdered activated carbon. Therefore, water treatment system 100 in this embodiment can stably remove odorous substances contained in the water to be treated while reducing, for example, the costs required for introducing and maintaining each pulverizer 5.

[0038] In the above example, a case is described in which activated carbon slurry is supplied to the pulverizer 5 and powdered activated carbon slurry is supplied from the pulverizer 5, but the present invention is not limited to this. Specifically, for example, solid activated carbon may be supplied to the pulverizer 5. In this case, for example, the pulverizer 5 may pulverize the solid activated carbon to produce solid powdered activated carbon.

[0039] Furthermore, in this case, the third correspondence information may be, for example, information indicating the correspondence relationship between the supply amount of activated carbon (solid activated carbon) to the pulverizer 5 (one pulverizer 5) and the particle size of powdered activated carbon. In this case, the control device 10 may calculate, for example, the supply amount of activated carbon (solid activated carbon) corresponding to the first particle size as the first supply amount.

[0040] [Control device 10 in the first embodiment] Next, the configuration of the control device 10 in the first embodiment will be described. Figure 3 is a diagram illustrating the hardware configuration of the control device 10.

[0041] The control device 10 is, for example, an electronic device having an electronic circuit. Specifically, as shown in Fig. 3, the control device 10 is, for example, a computer device having a CPU 101 which is a processor, a memory 102, a communication device 103, and a storage medium 104. Each unit is connected to each other via, for example, a bus 105.

[0042] The storage medium 104 has, for example, a program storage area (not shown) that stores a program 110 for performing the manufacturing control process. The storage medium 104 also has, for example, an information storage area 130 that stores information used when performing the manufacturing control process. The storage medium 104 may be, for example, a hard disk drive (HDD) or a solid state drive (SSD).

[0043] The CPU 101 performs manufacturing control processing by executing a program 110 loaded from the storage medium 104 to the memory 102, for example.

[0044] The communication device 103 accesses the pump P11, an operation terminal (not shown) through which an operator inputs necessary information, and the like, via a network (not shown) such as the Internet, for example.

[0045] The control device 10 may include, for example, a field programmable gate array (FPGA) or an application specific integrated circuit (ASIC), and the manufacturing control process may be executed in, for example, the FPGA or the ASIC.

[0046] Furthermore, although the following description will be given of a case where the water treatment system 100 has one control device 10, the water treatment system 100 may have, for example, a plurality of control devices 10. The manufacturing control process may be performed, for example, in a distributed manner among the plurality of control devices 10.

[0047] Furthermore, hereinafter, among the functions by which the control device 10 realizes the manufacturing control process, the function of calculating the first particle size will also be referred to as the first calculation unit, the function of calculating the first supply amount will also be referred to as the second calculation unit, and the function of controlling the supply of activated carbon slurry to the pulverizer 5 (for example, the function of controlling the pump P11) will also be referred to as the supply control unit.

[0048] [Manufacturing Control Process in the First Embodiment] Next, the production control process in the first embodiment will be described. FIG. 4 is a flowchart illustrating the production control process in the first embodiment. Hereinafter, the production control process will be described as being performed by the control device 10; however, the production control process may be performed manually by an operator, for example. Hereinafter, the case where 2-MIB contained in the water to be treated is the substance to be removed (hereinafter simply referred to as the target substance) will be described. Hereinafter, the case where the first correspondence information is an equation (hereinafter also referred to as the first equation) showing the correspondence relationship between the amount of powdered activated carbon to be injected (the amount injected per unit time) required to reduce a first concentration of odorous substances contained in the water to be treated to a second concentration and the particle size of the powdered activated carbon will be described. Hereinafter, the case where the second correspondence information is an equation (hereinafter also referred to as the second equation) showing the correspondence relationship between the amount of powdered activated carbon to be produced in the pulverizer 5 (the amount produced per unit time) and the particle size of the powdered activated carbon will be described. In addition, the following describes a case where the third correspondence information is an equation (hereinafter also referred to as the third equation) showing the correspondence relationship between the amount of activated carbon slurry supplied to the pulverizers 5 (the amount supplied per pulverizer 5) and the particle size of the powdered activated carbon.

[0049] The control device 10, for example, acquires a first formula stored in the information storage area 130 (step S1 in FIG. 4). Note that the first formula may be stored in advance in the information storage area 130 by, for example, an operator. A specific example of the first formula will be described below.

[0050] [Example of Formula 1] The first formula is, for example, the following (Formula 4), which is derived by using the following (Formula 1) to (Formula 3).

[0051]

number

[0052]

number

[0053]

number

[0054]

number

[0055] In the above (Equation 1) to (Equation 3), q represents the adsorption efficiency of odorous substances by powdered activated carbon, C0 represents the initial concentration (i.e., the first concentration) of the target substance in the treated water, and C i indicates the target concentration (i.e., the second concentration) of the target substance in the treated water, and C C indicates the injection rate of powdered activated carbon, d50 indicates the particle size of powdered activated carbon, and K, n, B1 and B2 each indicate a coefficient.

[0056] In addition, in the above (Equation 4), Q w indicates the amount of water to be treated, and M1 indicates the injection amount (ie, the first injection amount) of powdered activated carbon (powdered activated carbon contained in the powdered activated carbon slurry) to be injected into the water to be treated.

[0057] Returning to Fig. 3, the control device 10 acquires, for example, the second formula stored in the information storage area 130 (step S2 in Fig. 4). Note that the second formula may be stored in advance in the information storage area 130 by, for example, an operator. A specific example of the second formula will be described below.

[0058] [Example of formula 2] The second equation is, for example, the following (Equation 7), which is derived by using the following (Equation 5) and (Equation 6).

[0059]

number

[0060]

number

[0061]

number

[0062] In the above (Equation 5) to (Equation 7), Q c indicates the supply amount of activated carbon slurry supplied to the pulverizer 5 (i.e., the first supply amount), α indicates the concentration of activated carbon contained in the activated carbon slurry, β indicates the number of pulverizers 5 that can be operated in parallel, M2 indicates the production amount of powdered activated carbon (powdered activated carbon contained in the powdered activated carbon slurry) in the pulverizer 5 (i.e., the first production amount), and A1 and A2 each indicate a coefficient.

[0063] Returning to Fig. 3, the control device 10, for example, acquires the third formula stored in the information storage area 130 (step S3 in Fig. 4). Note that the third formula may be stored in advance in the information storage area 130 by, for example, an operator. Furthermore, the control device 10 may, for example, perform step S3 before step S2.

[0064] Specifically, in step S3, the control device 10 acquires, for example, (Equation 5) as the third equation.

[0065] Then, the control device 10 calculates the first particle size of the powdered activated carbon based on, for example, the first formula obtained in step S1 and the second formula obtained in step S2 (step S4 in FIG. 4).

[0066] Specifically, the control device 10 calculates d50 when M1 in (Equation 4) and M2 in (Equation 7) match, for example, as in the following (Equation 8).

[0067]

number

[0068] That is, in step S4, the control device 10 calculates the particle size of the powdered activated carbon required to reduce the concentration of odorous substances contained in the treated water from the first concentration to the second concentration, for example, by calculating the particle size (first particle size) of the powdered activated carbon when the first injection amount and the first production amount are the same.

[0069] Then, the control device 10 calculates a first supply amount of activated carbon slurry corresponding to the first particle size calculated in step S4 based on, for example, the third formula obtained in step S3 (step S5 in FIG. 4).

[0070] Specifically, the control device 10 calculates Q by substituting the first particle size calculated in step S4 for d50 in (Equation 5), for example. C is calculated as the first supply amount.

[0071] Thereafter, the control device 10 controls the pump P11 so that the amount of activated carbon slurry corresponding to the first supply amount calculated in step S5 is supplied to the pulverizer 5 (step S6 in FIG. 4), for example.

[0072] Specifically, the control device 10 controls the supply of activated carbon slurry to the pulverizer 5 in an amount corresponding to the first supply amount calculated in step S5, for example, by adjusting the frequency of an inverter (not shown) attached to the pump P11.

[0073] In this manner, the control device 10 in the present embodiment calculates a first particle size of powdered activated carbon when the first injection amount and the first production amount satisfy a predetermined condition, based on, for example, first correspondence information indicating a correspondence relationship between a first injection amount of powdered activated carbon required to reduce a first concentration of odorous substances contained in the water to be treated to a second concentration and the particle size of the powdered activated carbon, and second correspondence information indicating a correspondence relationship between a first production amount of powdered activated carbon in the pulverizer 5 and the particle size of the powdered activated carbon. Then, the control device 10 in the present embodiment calculates a first supply amount of activated carbon slurry corresponding to the calculated first particle size, based on, for example, third correspondence information indicating a correspondence relationship between a supply amount of activated carbon slurry to the pulverizer 5 and the particle size of the powdered activated carbon. Thereafter, the control device 10 in the present embodiment controls, for example, the pump P11 so that activated carbon slurry corresponding to the calculated first supply amount is supplied to the pulverizer 5.

[0074] Specifically, the control device 10 in this embodiment calculates, for example, the first particle size of the powdered activated carbon when the first injection amount per unit time and the first production amount per unit time are equal.

[0075] As a result, water treatment system 100 in this embodiment can stably remove odorous substances contained in the water to be treated while, for example, reducing the number of pulverizers 5 that produce activated carbon slurry. Therefore, water treatment system 100 in this embodiment can stably remove odorous substances contained in the water to be treated while reducing, for example, the costs required for introducing and maintaining each pulverizer 5.

[0076] Specifically, in the water treatment system 100 of the present embodiment, it is possible to continuously remove odorous substances contained in the water to be treated, even if, for example, the first concentration of odorous substances contained in the water to be treated flowing into the water treatment system 100 exceeds the concentration expected at the time of construction of the water treatment system 100. That is, in the water treatment system 100 of the present embodiment, even in this case, it is possible to continuously remove odorous substances contained in the water to be treated, for example, by using only the existing crusher 5, in other words, without installing a new crusher 5.

[0077] Furthermore, in the water treatment system 100 of the present embodiment, even when the water treatment system 100 is newly constructed, it is possible to reduce the number of pulverizers 5 that need to be introduced.

[0078] The control device 10 in this embodiment may measure the concentration of odorous substances contained in the water to be treated flowing through the line L1 or the like at predetermined timings, such as periodically, using a measuring device (not shown) provided in the line L1 or the like. The control device 10 in this embodiment may perform the production control process in this embodiment, for example, when the first concentration is equal to or greater than a predetermined threshold value (hereinafter also referred to as a specific threshold value). The control device 10 in this embodiment may perform, instead of the production control process in this embodiment, a process of adjusting the amount of powdered activated carbon supplied to the water to be treated by adjusting the operating time of the pulverizer 5 while keeping the particle size of the powdered activated carbon produced in the pulverizer 5 (the amount of activated carbon slurry supplied to the pulverizer 5) constant, for example, when the first concentration is less than the specific threshold value.

[0079] That is, the control device 10 may perform the production control process in this embodiment when, for example, the concentration of odorous substances contained in the water to be treated cannot be reduced from the first concentration to the second concentration unless an increase in the particle size of the powdered activated carbon is allowed. Hereinafter, among the functions of the control device 10 that realize the production control process, the function of measuring the first concentration will also be referred to as the concentration measurement unit.

[0080] As a result, the water treatment system 100 in this embodiment can, for example, reduce the amount of powdered activated carbon supplied to the water to be treated, and can reduce the amount of activated carbon slurry that needs to be supplied to the pulverizer 5.

[0081] [Manufacturing Control Process in the First Modification] Next, a modified example of the manufacturing control process in the first embodiment (hereinafter also simply referred to as a first modified example) will be described.

[0082] In the water treatment system 100, for example, when the concentration (first concentration) of odorous substances contained in the water to be treated increases, even if an increase in the particle size of the powdered activated carbon (a decrease in the adsorption performance of the powdered activated carbon) is allowed and the amount of powdered activated carbon injected into the water to be treated is increased, it may not be possible to sufficiently reduce the concentration of odorous substances contained in the water to be treated.

[0083] Therefore, the control device 10 in this modification may, for example, when the first particle size calculated in step S4 is equal to or larger than a predetermined threshold, output information regarding the addition of the number of crushers 5 to an operation terminal (not shown) viewable by an operator. The information regarding the addition of the number of crushers 5 is, for example, information indicating that a state exists in which the number of crushers 5 needs to be added.

[0084] In addition, the control device 10 in this modified example may, for example, output information regarding the addition of the number of crushers 5 to an operation terminal that can be viewed by an operator when the first supply amount calculated in step S5 is equal to or greater than a predetermined threshold value.

[0085] This allows the control device 10 in this modified example to prompt the worker to take measures such as adding a pulverizer 5 that produces powdered activated carbon. [Explanation of symbols]

[0086] 1: Contact pond 2: Mixing pond 3: Flocculation pond 4: Activated carbon dissolution tank 5: Crusher 6: Flocculant storage tank 10: Control device 100: Water treatment system 101:CPU 102:Memory 103: Communication device 104: Storage medium 105: Bus 110: Program 130: Information storage area L1: Line L2: Line L3: Line L4: Line L11: Line L12: Line L13: Line P1: Pump P2: Pump P3: Pump P11: Pump P12: Pump

Claims

1. A production control device for controlling the production of powdered activated carbon by pulverizing activated carbon, a first calculation unit that calculates a first particle size of the powdered activated carbon when the injection amount and the production amount satisfy a predetermined condition, based on first correspondence information that indicates a correspondence relationship between the injection amount of the powdered activated carbon required to reduce a first concentration of odorous substances contained in the water to be treated to a second concentration and the particle size of the powdered activated carbon, and second correspondence information that indicates a correspondence relationship between the injection amount of the powdered activated carbon in a production device that produces the powdered activated carbon and the particle size of the powdered activated carbon; a second calculation unit that calculates a first supply amount of the activated carbon corresponding to the first particle size calculated by the first calculation unit based on third correspondence information that indicates a correspondence relationship between a supply amount of the activated carbon to the manufacturing apparatus and a particle size of the powdered activated carbon; a supply control unit that controls the activated carbon to be supplied to the manufacturing apparatus in an amount corresponding to the first supply amount calculated by the second calculation unit.

2. The production control device according to claim 1 , wherein the first calculation unit calculates a first particle size of the powdered activated carbon when the injection amount per unit time and the production amount per unit time are equal.

3. further comprising a concentration measuring unit for measuring the first concentration, The manufacturing control device according to claim 1 , wherein the first calculation unit calculates the first particle size when the first concentration measured by the concentration measurement unit is equal to or greater than a threshold value.

4. A method for controlling the production of powdered activated carbon by pulverizing activated carbon, comprising: calculating a first particle size of the powdered activated carbon when the injection amount and the production amount satisfy a predetermined condition based on first correspondence information indicating a correspondence relationship between the injection amount of the powdered activated carbon into the water to be treated required to reduce a first concentration of odorous substances contained in the water to be treated to a second concentration and the particle size of the powdered activated carbon, and second correspondence information indicating a correspondence relationship between the production amount of the powdered activated carbon in a production device that produces the powdered activated carbon and the particle size of the powdered activated carbon; calculating a first supply amount of the activated carbon corresponding to the calculated first particle size based on third correspondence information indicating a correspondence relationship between a supply amount of the activated carbon to the manufacturing apparatus and a particle size of the powdered activated carbon; a control method for controlling the supply of the activated carbon to the manufacturing apparatus so as to correspond to the calculated first supply amount;

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