Control device, water treatment system, control method and program

Abstract

To efficiently add chemicals. [Solution] The system includes a chemical information acquisition unit 110 that acquires chemical information indicating the amount of chemicals added to the water to be treated supplied to the water treatment device 200, a water quality value acquisition unit 120 that acquires the water quality value of the water to be treated to which the water treatment device 200 or water treatment device 300 has added chemicals, a condition water quality value acquisition unit 130 that acquires the water quality value that the treated water treated by the water treatment device 300 must satisfy, a required addition amount calculation unit 140 that calculates the amount of chemicals to be added to the water to be treated supplied to the water treatment device 300 based on the water quality value acquired by the water quality value acquisition unit 120 and the water quality value acquired by the condition water quality value acquisition unit 130, a difference calculation unit 150 that calculates the difference between the addition amount calculated by the required addition amount calculation unit 140 and the addition amount of chemicals acquired by the chemical information acquisition unit 110, and a presentation unit 160 that presents the addition amount calculated by the difference calculation unit 150 to the water treatment device 300.

Description

Technical Field

[0001] The present invention relates to a control device, a water treatment system, a control method, and a program.

Background Art

[0002] In recent years, in order to address the global water problem that is becoming more serious, effective utilization of water resources has been demanded. Therefore, industrial wastewater, sewage, seawater, etc. are treated and used as industrial water. Water treatment is performed at a place called a water recycling plant, and the produced industrial water is supplied to factories that use it. These waters may contain urea in the raw water and have a higher urea concentration than the tap water that was conventionally used. Urea removal treatment is performed not only in factories that use industrial water but also in water recycling plants. In addition, in water recycling plants, water quality analysis is performed on the treated water (recycled water) to check whether the recycled water meets the water quality standards set for each water recycling plant. When there is a water quality standard for urea concentration, the urea concentration is measured.

[0003] A pure water production device used for producing pure water from raw water such as tap water, groundwater, and industrial water is configured by combining, for example, a reverse osmosis device, an ion exchange device, an ultraviolet oxidation device, etc. Urea is a substance that is difficult to remove by any of the reverse osmosis device, the ion exchange device, and the ultraviolet oxidation device. Therefore, when urea is contained in the raw water, urea remains in the produced pure water, and the TOC (Total Organic Carbon) concentration of the pure water increases. When producing pure water with particularly high purity, that is, ultrapure water, for applications such as semiconductor manufacturing, the upper limit value of the TOC concentration in the obtained ultrapure water is strictly set. Therefore, as a pretreatment for the process of producing pure water or ultrapure water from raw water, a process for removing urea from the raw water is required. As a process for removing urea contained in the raw water, which is the water to be treated, a process of adding a bromide salt and a hypochlorite, specifically sodium bromide and sodium hypochlorite, to the water to be treated to generate hypobromous acid and decomposing urea with this hypobromous acid has been disclosed (see, for example, Patent Documents 1 to 3). [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Patent No. 3546548 [Patent Document 2] Patent No. 5678436 [Patent Document 3] Patent No. 6279295 [Overview of the project] [Problems that the invention aims to solve]

[0005] In the treatment process for decomposing urea contained in water to be treated, of the two chemicals added to the water to be treated, bromide salt and hypochlorite, bromide salt remains even after treatment. Therefore, when bromide salt is added to treated water in a water treatment device to further decompose urea in a subsequent water treatment device, if the amount of remaining bromide salt can be recognized, the amount of bromide salt added in the subsequent water treatment device can be reduced in order for the treated water from the subsequent water treatment device to meet the predetermined water quality value (urea concentration). However, measuring the concentration of bromide salt in the treated water supplied from the preceding water treatment device to the subsequent water treatment device is costly. Therefore, there is a problem in that it is difficult to add the appropriate amount of chemical.

[0006] The object of the present invention is to provide a control device, a water treatment system, a control method, and a program that enable efficient addition of chemicals. [Means for solving the problem]

[0007] The control device of the present invention is A chemical information acquisition unit acquires chemical information from the first water treatment device, which indicates the amount of chemicals added to the water to be treated supplied to the first water treatment device. A water quality value acquisition unit that acquires at least one of the water quality value of the water to be treated to which the chemical has been added by the first water treatment device, and the water quality value of the water to be treated to which the chemical has been added by the second water treatment device that treats the water to which the chemical has been added by the first water treatment device, A conditional water quality value acquisition unit acquires water quality values ​​that satisfy the conditions for treated water treated by the second water treatment device, Based on the water quality values ​​acquired by the water quality value acquisition unit and the water quality values ​​acquired by the conditional water quality value acquisition unit, the required amount of chemicals to be added by the second water treatment device to the water to be treated supplied from the first water treatment device is calculated by the required amount calculation unit. A difference calculation unit calculates the difference between the amount of additive calculated by the required additive amount calculation unit and the amount of additive indicated by the chemical information acquired by the chemical information acquisition unit. The system includes a display unit that displays the amount of additive calculated by the difference calculation unit to the second water treatment device.

[0008] Furthermore, the water treatment system of the present invention is It has a water supply device that processes water to be treated to which chemicals have been added, and a control device, The control device is A chemical information acquisition unit acquires chemical information from a water supply source device that supplies water to be treated, indicating the amount of chemicals added to the water to be treated supplied to the water to be treated, the water supply source device that supplies the water to be treated to the water to be treated destination device. A water quality value acquisition unit that acquires at least one of the water quality value indicating the water quality of the water to be treated to which the chemical has been added, obtained by the water supply source device for the water to be treated, and the water quality value of the water to which the chemical has been added, A water quality value acquisition unit that acquires water quality values ​​that satisfy the conditions for treated water treated by the treated water supply device, A required addition amount calculation unit calculates the amount of chemicals to be added by the treated water supply device to the treated water supplied from the treated water source device, based on the water quality values ​​acquired by the water quality value acquisition unit and the conditional water quality value acquisition unit. A difference calculation unit calculates the difference between the amount of additive calculated by the required additive amount calculation unit and the amount of additive indicated by the chemical information acquired by the chemical information acquisition unit. The system includes a display unit that displays the amount of additive calculated by the difference calculation unit to the treated water supply device, The water to be treated supply device adds the amount of chemicals indicated by the display unit to the water to be treated.

[0009] Furthermore, the control method of the present invention is A process to obtain chemical information from the first water treatment device, which indicates the amount of chemicals added to the water to be treated supplied to the first water treatment device, A process to obtain at least one of the water quality value of the water to be treated to which the first water treatment device has added the chemical, and the water quality value of the water to which the second water treatment device, which treats the water to be treated to which the first water treatment device has added the chemical, has added the chemical. A process in which the first water treatment device treats the water to be treated to which the chemical has been added, and a second water treatment device obtains from the second water treatment device the water quality value that satisfies the conditions of the treated water, A process to calculate the amount of chemical to be added by the second water treatment device to the water to be treated supplied from the first water treatment device, based on the water quality values ​​obtained from the first water treatment device and the water quality values ​​obtained from the second water treatment device, A process to calculate the difference between the amount of additive calculated above and the amount of additive indicated by the acquired chemical information above, The process involves presenting the calculated amount of additive to the second water treatment device.

[0010] Furthermore, the program of the present invention, On the computer, A procedure for obtaining chemical information from the first water treatment device, which indicates the amount of chemicals added to the water to be treated supplied to the first water treatment device, A procedure for obtaining at least one of the water quality values ​​of the treated water to which the first water treatment device has added the chemical, and the water quality values ​​of the treated water to which the second water treatment device, which treats the treated water to which the first water treatment device has added the chemical, has added the chemical; A procedure for obtaining from the second water treatment device the water to be treated, which is treated by the first water treatment device with the chemical added, the water quality value that satisfies the conditions of the treated water, A procedure for calculating the dosage of a chemical to be added by the second water treatment device to the water to be treated supplied from the first water treatment device based on the water quality values obtained from the first water treatment device and the water quality values obtained from the second water treatment device, A procedure for calculating the difference between the calculated dosage and the dosage of the chemical indicated by the obtained chemical information, A procedure for presenting the calculated dosage to the second water treatment device is executed.

Effect of the Invention

[0011] In the present invention, efficient addition of chemicals can be performed.

Brief Description of the Drawings

[0012] [Figure 1] It is a diagram showing a first embodiment of a water treatment system according to the present invention. [Figure 2] It is a diagram showing an example of the components included in the control device shown in FIG. 1. [Figure 3] It is a flowchart for explaining an example of a control method in the control device shown in FIG. 1. [Figure 4] It is a diagram showing a second embodiment of a water treatment system according to the present invention. [Figure 5] It is a diagram showing an example of the components included in the control device shown in FIG. 4. [Figure 6] It is a flowchart for explaining an example of a control method in the control device shown in FIG. 4. [Figure 7] It is a diagram showing a third embodiment of a water treatment system according to the present invention. [Figure 8] It is a diagram showing an example of the components included in the control device shown in FIG. 7. [Figure 9] It is a flowchart for explaining an example of a control method in the control device shown in FIG. 7. [Figure 10] It is a diagram showing a fourth embodiment of a water treatment system according to the present invention. [Figure 11]This figure shows an example of the components of the control device shown in Figure 10. [Figure 12] Figure 10 is a flowchart illustrating an example of a control method in the control device shown. [Modes for carrying out the invention]

[0013] Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment)

[0014] Figure 1 shows a first embodiment of the water treatment system according to the present invention. As shown in Figure 1, the water treatment system in this embodiment includes a control device 100 and water treatment devices 200 and 300. The control device 100 and the water treatment devices 200 and 300 are each connected to each other in a manner that allows them to communicate with one another.

[0015] The water treatment device 200 is a first water treatment device (water treatment source device) that adds predetermined chemicals to the supplied water to be treated and treats it, and supplies the treated water (hereinafter referred to as recycled water) to the water treatment device 300. The water treatment device 200 is a device installed, for example, in a tap water plant that supplies tap water or a recycled water plant that manufactures and supplies recycled water. The water treatment device 200 adds sodium bromide and hypochlorous acid to the supplied water to be treated and performs urea decomposition treatment to decompose the urea contained in the water to be treated. The water treatment device 200 notifies the control device 100 of the amount of chemicals added. At this time, the water treatment device 200 may also notify the control device 100 of the type of chemicals added. The water treatment device 200 also has a water quality meter 210. The water quality meter 210 periodically or continuously measures the water quality (urea concentration) of the recycled water after treatment. The water treatment device 200 notifies the control device 100 of the measured value measured by the water quality meter 210. The timing of notification of the measured values ​​may be predetermined, or it may be at the time the control device 100 requests the measured values; there are no specific restrictions.

[0016] The water treatment device 300 is a second water treatment device (a device that supplies treated water) that adds a predetermined chemical to recycled water (tap water or recycled water) supplied from the water treatment device 200. The water treatment device 300 notifies the control device 100 of the water quality value that the treated water processed by the water treatment device 300 must satisfy. This condition is the requirement that the water treatment device 300 must produce treated water of a certain quality. The amount of chemical to be added by the water treatment device 300 is indicated by the control device 100. The water treatment device 300 is installed, for example, in a supply plant that manufactures semiconductors, and the treated water processed by the water treatment device 300 is used in semiconductor manufacturing. The water treatment device 300 adds the amount of chemical indicated by the control device 100 to the tap water or recycled water supplied from the water treatment device 200. The water treatment device 300 may also notify the control device 100 of the water quality (urea concentration) of the treated water to which the chemical has been added.

[0017] The control device 100 calculates the amount of chemicals that the water treatment device 300 will add to the reclaimed water supplied from the water treatment device 200, based on the water quality values ​​and the amount of chemicals added obtained from the water treatment device 200, and the conditions obtained from the water treatment device 300.

[0018] Figure 2 shows an example of the components of the control device 100 shown in Figure 1. As shown in Figure 2, the control device 100 shown in Figure 1 includes a chemical information acquisition unit 110, a water quality value acquisition unit 120, a conditional water quality value acquisition unit 130, a required addition amount calculation unit 140, a difference calculation unit 150, and a display unit 160. Note that Figure 2 shows only the main components of the control device 100 shown in Figure 1 that are relevant to this embodiment.

[0019] The chemical information acquisition unit 110 acquires chemical information from the water treatment device 200, indicating the type of chemical and the amount of that chemical added. The type of chemical included in the chemical information acquired by the chemical information acquisition unit 110 is bromide salt (sodium bromide), which is added to the water to be treated in the water treatment device 200 for urea removal treatment and remains after treatment. The chemical information acquisition unit 110 notifies the difference calculation unit 150 of the acquired chemical information, indicating the type of chemical and the amount of that chemical added.

[0020] The water quality value acquisition unit 120 acquires the water quality value of the reclaimed water notified from the water treatment device 200. The water quality value acquisition unit 120 acquires the urea concentration value as the water quality value. In addition, if the water quality value acquisition unit 120 receives notification of the water quality value (urea concentration) from the water treatment device 300, it acquires the notified water quality value (urea concentration). The water quality value acquisition unit 120 notifies the required addition amount calculation unit 140 of the acquired urea concentration value.

[0021] The conditional water quality value acquisition unit 130 acquires the water quality value, which is the condition for the treated water of the water treatment device 300, as notified by the water treatment device 300. The conditional water quality value acquisition unit 130 acquires the urea concentration value as the water quality value. This condition is predetermined in the water treatment device 300. For example, this condition is the water quality standard that a semiconductor factory using the treated water treated by the water treatment device 300 requires. The conditional water quality value acquisition unit 130 notifies the required addition amount calculation unit 140 of the acquired urea concentration value.

[0022] The required amount calculation unit 140 calculates the amount of chemicals to be added by the water treatment device 300 to the reclaimed water supplied from the water treatment device 200, based on the water quality values ​​notified by the water quality value acquisition unit 120 and the water quality values ​​notified by the conditional water quality value acquisition unit 130. At this time, the required amount calculation unit 140 calculates the amount of bromide salt to be added by the water treatment device 300 to the reclaimed water supplied from the water treatment device 200, based on the urea concentration value notified by the water quality value acquisition unit 120 and the urea concentration value notified by the conditional water quality value acquisition unit 130. Specifically, for example, the required amount calculation unit 140 calculates how much chemical (bromide salt) should be added to the reclaimed water with the urea concentration notified by the water quality value acquisition unit 120 so that the urea concentration of the water to be treated becomes the urea concentration notified by the conditional water quality value acquisition unit 130. The required amount calculation unit 140 notifies the difference calculation unit 150 of the value indicating the calculated amount of additive.

[0023] The difference calculation unit 150 calculates the difference between the amount of additive notified by the required additive amount calculation unit 140 and the amount of additive of the chemical (bromide salt) indicated by the chemical information notified by the chemical information acquisition unit 110. At this time, the difference calculation unit 150 calculates the difference if the amount of additive notified by the required additive amount calculation unit 140 is greater than the amount of additive of the chemical (bromide salt) indicated by the chemical information notified by the chemical information acquisition unit 110. On the other hand, if the amount of additive notified by the required additive amount calculation unit 140 is less than or equal to the amount of additive of the chemical (bromide salt) indicated by the chemical information notified by the chemical information acquisition unit 110, the difference calculation unit 150 calculates the difference as "0". The difference calculation unit 150 notifies the presentation unit 160 of the calculated difference (amount of additive). It goes without saying that the difference calculation unit 150 calculates the difference in the amount of additive when the chemical added by the water treatment device 200 and the chemical added by the water treatment device 300 are the same chemical.

[0024] The presentation unit 160 presents the amount of additive notified by the difference calculation unit 150 to the water treatment device 300. The presentation method can be any format that allows the water treatment device 300 to add the amount of chemical notified by the difference calculation unit 150 to the regenerated water. For example, the presentation unit 160 may send a control signal indicating the amount of additive notified by the difference calculation unit 150 to the water treatment device 300.

[0025] The control method for the control device 100 shown in Figure 1 will be described below. Figure 3 is a flowchart illustrating an example of the control method for the control device 100 shown in Figure 1.

[0026] First, the chemical information acquisition unit 110 acquires chemical information from the water treatment device 200, indicating the type of chemical and the amount of chemical added (step S1). Here, the chemical is a bromide salt. Next, the water quality value acquisition unit 120 acquires the water quality value of the reclaimed water from the water treatment device 200 (step S2). Here, the water quality value acquired by the water quality value acquisition unit 120 is the urea concentration value. Next, the condition water quality value acquisition unit 130 acquires the water quality value that is the condition for the treated water of the water treatment device 300, as notified by the water treatment device 300 (step S3). Here, the condition acquired by the condition water quality value acquisition unit 130 is the urea concentration value.

[0027] Next, the required addition amount calculation unit 140 calculates the amount of chemical (bromide salt) to be added by the water treatment device 300 to the reclaimed water supplied from the water treatment device 200 to the water treatment device 300, based on the water quality value (urea concentration value) acquired by the water quality value acquisition unit 120 and the condition water quality value acquisition unit 130 (step S4). The specific calculation method is as described above. Then, the difference calculation unit 150 calculates the difference between the addition amount calculated by the required addition amount calculation unit 140 and the addition amount of chemical (bromide salt) indicated by the chemical information acquired by the chemical information acquisition unit 110 (step S5). The presentation unit 160 presents the difference addition amount calculated by the difference calculation unit 150 to the water treatment device 300 (step S6).

[0028] In this configuration, the control device 100 acquires water quality values ​​measured for recycled water treated by the water treatment device 200, such as a recycled water plant, as well as information on added chemicals and the amount of chemicals. Based on the information acquired by the control device 100, the operating conditions of the water treatment device 300 installed at the supply destination plant are determined. By acquiring water quality information for the recycled water treated by the water treatment device 200, the water treatment device 300 does not need to perform water quality measurements again. The control device 100 also acquires information on the chemicals added by the water treatment device 200 and the amount added. This allows the amount of bromide salt remaining in the recycled water treated by the water treatment device 200 to be determined and used in determining the operating conditions. Alternatively, the control device 100 may acquire information indicating the flow rate of the recycled water treated by the water treatment device 200 and calculate the chemical concentration in the water treatment device 300.

[0029] Furthermore, when the same chemical (residual chemical) is added to both the water treatment device 200 and the water treatment device 300, as in this embodiment, by obtaining the amount added by the water treatment device 200, the amount of chemical to be added can be calculated from the difference between the obtained amount and the amount of chemical added by the water treatment device 300 that satisfies the required water quality standards, thereby reducing the amount of chemical added by the water treatment device 300.

[0030] When urea removal treatment is performed in the water treatment device 200, water-soluble bromide salt and hypochlorite are added in the water treatment device 200. The hypochlorite is reduced over time by the urea removal reaction and other reactions. On the other hand, the water-soluble bromide salt remains. Therefore, the amount of water-soluble bromide salt added in the water treatment device 300 can be reduced. Measuring the concentration of water-soluble bromide salt using ion chromatography or other methods to measure bromide ion concentrations is costly. Since the amount of water-soluble bromide salt added fluctuates in accordance with the fluctuations in urea concentration, the water treatment device 200 is equipped with a device to continuously measure the bromide ion concentration, thereby reducing the installation cost.

[0031] Furthermore, ammonia combines with hypochlorite to produce chloramine. Since hypochlorite is consumed by the production of chloramine, the control device 100 may obtain the ammonia concentration in the regenerated water measured by the water treatment device 200, and take into account the amount of hypochlorite consumed by chloramine production to determine the amount of hypochlorite to be added by the water treatment device 200. (Second Embodiment)

[0032] Figure 4 shows a second embodiment of the water treatment system according to the present invention. As shown in Figure 4, the water treatment system in this embodiment includes a control device 101 and water treatment devices 200 and 301. The control device 101 and the water treatment devices 200 and 301 are each connected to each other in a manner that allows for communication. The water treatment device 200 is the same as that in the first embodiment.

[0033] The water treatment device 301 includes a flow meter 311 in addition to the functions of the water treatment device 300 in the first embodiment. The flow meter 311 measures the cumulative flow rate of reclaimed water supplied from the water treatment device 200 to the water treatment device 301. The flow meter 311 notifies the control device 101 of the measured flow rate value. The timing of the notification is not specifically defined.

[0034] In addition to the functions of the control device 100 in the first embodiment, the control device 101 has a function that takes into account the time it takes for the reclaimed water from the water treatment device 200 to reach the water treatment device 301.

[0035] Figure 5 shows an example of the components of the control device 101 shown in Figure 4. As shown in Figure 5, the control device 101 shown in Figure 4 includes a chemical information acquisition unit 110, a water quality value acquisition unit 120, a conditional water quality value acquisition unit 130, a required addition amount calculation unit 140, a difference calculation unit 150, a display unit 161, a flow rate value acquisition unit 171, and an arrival time calculation unit 181. The chemical information acquisition unit 110, water quality value acquisition unit 120, conditional water quality value acquisition unit 130, required addition amount calculation unit 140, and difference calculation unit 150 are the same as those in the first embodiment. Note that Figure 5 shows only the main components of the control device 101 shown in Figure 4 that are relevant to this embodiment.

[0036] The flow rate acquisition unit 171 acquires the flow rate value notified from the flow meter 311. The flow rate acquisition unit 171 notifies the arrival time calculation unit 181 of the acquired flow rate value.

[0037] The arrival time calculation unit 181 calculates the time it takes for the reclaimed water from the water treatment device 200 to reach the water treatment device 301, based on the volume of the piping through which the reclaimed water flows from the water treatment device 200 to the water treatment device 301 and the flow rate value notified by the flow rate value acquisition unit 171. The arrival time calculation unit 181 may also calculate the time by adding the volume of the reaction tank in which the reclaimed water is stored after chemicals are added in the water treatment device 200, in addition to the volume of the piping from the water treatment device 200 to the water treatment device 301. Alternatively, the arrival time calculation unit 181 may also calculate the time it takes for the reclaimed water to reach the water treatment device 301 from the water treatment device 200 based on the volume of the piping through which the reclaimed water flows from the water treatment device 200 to the water treatment device 301 and a pre-set planned water volume. Furthermore, the arrival time calculation unit 181 may calculate the time it takes for the reclaimed water to reach the water treatment device 301 from the water treatment device 200 based on the volume of the piping through which the reclaimed water flows from the water treatment device 200 to the water treatment device 301 and the instantaneous flow rate of the flow meter for any given period. Alternatively, the time calculation unit 181 may calculate the time it takes for the reclaimed water to reach the water treatment device 301 from the water treatment device 200 based on the time when a water quality fluctuation (e.g., a peak value) is detected in the water treatment device 200 and the time when a similar water quality fluctuation is detected in the water treatment device 301. The arrival time calculation unit 181 notifies the presentation unit 161 of the calculated time.

[0038] The presentation unit 161 presents the amount of additive notified by the difference calculation unit 150 to the water treatment device 300 after the time notified by the arrival time calculation unit 181. The presentation method may be the same as the method performed by the presentation unit 160 in the first embodiment.

[0039] The control method for the control device 101 shown in Figure 4 will be described below. Figure 6 is a flowchart illustrating an example of the control method for the control device 101 shown in Figure 4.

[0040] First, the flow rate acquisition unit 171 acquires the flow rate measured by the flow meter 311 (step S11). Next, the arrival time calculation unit 181 calculates the time it takes for the reclaimed water from the water treatment device 200 to reach the water treatment device 301, based on the volume of the piping through which the reclaimed water flows from the water treatment device 200 to the water treatment device 301 and the flow rate acquired by the flow rate acquisition unit 171 (step S12).

[0041] Furthermore, the chemical information acquisition unit 110 acquires chemical information indicating the type of chemical and the amount of chemical added, which has been notified from the water treatment device 200 (step S13). Here, this chemical is a bromide salt. Also, the water quality value acquisition unit 120 acquires the water quality value of the reclaimed water, which has been notified from the water treatment device 200 (step S14). Here, the water quality value acquired by the water quality value acquisition unit 120 is the urea concentration value. Also, the condition water quality value acquisition unit 130 acquires the water quality value that is the condition of the treated water from the water treatment device 301, which has been notified from the water treatment device 301 (step S15). Here, the condition acquired by the condition water quality value acquisition unit 130 is the urea concentration value.

[0042] Next, the required addition amount calculation unit 140 calculates the amount of chemical (bromide salt) to be added by the water treatment device 301 to the reclaimed water supplied from the water treatment device 200 to the water treatment device 301, based on the water quality value (urea concentration value) acquired by the water quality value acquisition unit 120 and the water quality value (urea concentration value) acquired by the condition water quality value acquisition unit 130 (step S16). The specific calculation method may be the same as the method in the first embodiment. Then, the difference calculation unit 150 calculates the difference between the amount of addition calculated by the required addition amount calculation unit 140 and the amount of chemical (bromide salt) to be added indicated by the chemical information acquired by the chemical information acquisition unit 110 (step S17).

[0043] The processes in steps S11-S12 and steps S13-S17 can be performed in any order.

[0044] The display unit 161 waits for the time calculated by the arrival time calculation unit 181 in step S12 (step S18). Once the time calculated by the arrival time calculation unit 181 has elapsed, the display unit 161 displays the difference in the amount to be added, calculated by the difference calculation unit 150, to the water treatment device 301 (step S19).

[0045] Thus, in this embodiment, in addition to the first embodiment, the amount to be added is presented to the water treatment device 301, taking into account the time it takes for the regenerated water from the water treatment device 200 to reach the water treatment device 301. This allows the water treatment device 301 to add chemicals in amounts that correspond to fluctuations in urea concentration and amount added due to time variations. (Third embodiment)

[0046] Figure 7 shows a third embodiment of the water treatment system according to the present invention. As shown in Figure 7, the water treatment system in this embodiment includes a control device 102 and water treatment devices 200 and 302. The control device 102 and the water treatment devices 200 and 302 are each connected to each other in a manner that allows for communication. The water treatment device 200 is the same as that in the first embodiment.

[0047] The water treatment device 302 includes a water quality meter 322 in addition to the functions of the water treatment device 300 in the first embodiment. The water quality meter 322 measures the water quality (urea concentration) of the reclaimed water supplied from the water treatment device 200 to the water treatment device 302. The water quality meter 322 notifies the control device 102 of the value of the water quality (urea concentration) of the reclaimed water. The timing of the notification is not specifically defined.

[0048] In addition to the functions of the control device 100 in the first embodiment, the control device 102 also has a function to compare the water quality (urea concentration) value notified by the water quality meter 210 of the water treatment device 200 with the water quality (urea concentration) value notified by the water quality meter 322 of the water treatment device 302.

[0049] Figure 8 shows an example of the components of the control device 102 shown in Figure 7. As shown in Figure 8, the control device 102 shown in Figure 7 includes a chemical information acquisition unit 110, a water quality value acquisition unit 122, a conditional water quality value acquisition unit 130, a required addition amount calculation unit 140, a difference calculation unit 150, a display unit 160, a measured water quality value acquisition unit 192, and an alarm output unit 193. The chemical information acquisition unit 110, the conditional water quality value acquisition unit 130, the required addition amount calculation unit 140, the difference calculation unit 150, and the display unit 160 are the same as those in the first embodiment. Note that Figure 8 shows only the main components of the control device 102 shown in Figure 7 that are relevant to this embodiment.

[0050] In addition to the functions of the water quality value acquisition unit 120 in the first embodiment, the water quality value acquisition unit 122 also has the function of notifying the alarm output unit 193 of the acquired water quality values.

[0051] The water quality measurement unit 192 acquires the water quality (urea concentration) value of the reclaimed water that has been notified by the water quality meter 322 installed in the water treatment device 302. The water quality measurement unit 192 notifies the alarm output unit 193 of the acquired water quality (urea concentration) value of the reclaimed water.

[0052] The alarm output unit 193 compares the difference between the water quality value notified by the water quality value acquisition unit 122 and the water quality value notified by the measured water quality value acquisition unit 192 with a predetermined threshold. If the difference between the water quality value notified by the water quality value acquisition unit 122 and the water quality value notified by the measured water quality value acquisition unit 192 exceeds the predetermined threshold, an alarm is output to the water treatment device 200 and the water treatment device 302. The output method of this alarm may also be the transmission of a warning signal and is not specifically defined.

[0053] The control method for the control device 102 shown in Figure 7 will be described below. Figure 9 is a flowchart illustrating an example of the control method for the control device 102 shown in Figure 7. Here, the processing performed by the additional functions from the first embodiment will be described.

[0054] First, the water quality value acquisition unit 122 acquires the measured value from the water quality meter 210 (step S21). Then, the measured water quality value acquisition unit 192 acquires the measured value from the water quality meter 322 (step S22). The order in which the process in step S21 and the process in step S22 are performed does not matter.

[0055] Then, the alarm output unit 193 determines whether the difference between the measurement value acquired by the water quality value acquisition unit 122 in step S21 and the measurement value acquired by the water quality value acquisition unit 192 in step S22 exceeds a threshold (step S23). If the difference exceeds the threshold, the alarm output unit 193 outputs an alarm to the water treatment device 200 and the water treatment device 302 (step S24).

[0056] In this embodiment, in addition to the first embodiment, water quality meters are installed on both the side supplying and receiving the recycled water, and an alarm notification is issued when the difference between the values ​​measured by the two water quality meters exceeds a predetermined range. This allows for rapid detection of abnormalities in the water quality meters. Furthermore, if the difference between the values ​​measured by the two water quality meters exceeds a predetermined range, the measurement value with the smaller fluctuation from the immediately preceding measurement may be used to calculate the amount to be added. This prevents the addition of incorrect amounts of chemicals corresponding to abnormal water quality values. (Fourth embodiment)

[0057] Figure 10 shows a fourth embodiment of the water treatment system according to the present invention. As shown in Figure 10, the water treatment system in this embodiment includes a control device 103, water treatment devices 203-1, 203-2, 303-1 to 303-3, and water flow control devices 403-1 to 403-3, 503-1 to 503-3. The control device 103 and the water treatment devices 203-1, 203-2 and 303-1 to 303-3 are each connected to each other in a manner that allows for communication. The control device 103 also instructs the water flow control devices 403-1 to 403-3 and 503-1 to 503-3 to control the flow of water.

[0058] The water treatment device 203-1 is a first water treatment device having the same functions as the water treatment device 200 in the first embodiment. The water treatment device 203-1 is, for example, a device installed in a water treatment plant that supplies tap water. The water treatment device 203-1 also has a water quality meter 213-1. The water quality meter 213-1 periodically or continuously measures the water quality (urea concentration) of the treated tap water. The water treatment device 203-1 notifies the control device 103 of the measured values ​​measured by the water quality meter 213-1. The timing of the notification of the measured values ​​may be at a predetermined timing or at the timing when the control device 103 requests the measured values, and is not particularly specified.

[0059] The water treatment device 203-2 is a first water treatment device that has the same functions as the water treatment device 200 in the first embodiment. The water treatment device 203-2 is a device installed, for example, in a recycled water plant that produces and supplies recycled water. The water treatment device 203-2 also has a water quality meter 213-2. The water quality meter 213-2 periodically or continuously measures the water quality (urea concentration) of the recycled water after treatment. The water treatment device 203-2 notifies the control device 103 of the measured values ​​measured by the water quality meter 213-2. The timing of the notification of the measured values ​​may be at a predetermined timing or at the timing when the control device 103 requests the measured values, and is not particularly specified.

[0060] Each of the water treatment devices 303-1 to 303-3 is a second water treatment device that adds predetermined chemicals to tap water or recycled water supplied from water treatment devices 203-1 and 203-2 for treatment. Each of the water treatment devices 303-1 to 303-3 notifies the control device 103 of the water quality value that the treated water produced by each of the water treatment devices 303-1 to 303-3 must satisfy. This condition is the requirement that each of the water treatment devices 303-1 to 303-3 must produce treated water of a certain quality. The amount of chemicals to be added by each of the water treatment devices 303-1 to 303-3 is indicated by the control device 103. Each of the water treatment devices 303-1 to 303-3 is installed, for example, in a customer factory that manufactures semiconductors, and the treated water produced by each of the water treatment devices 303-1 to 303-3 is used in the manufacture of semiconductors.

[0061] The water flow control device 403-1 controls the flow of tap water from the water treatment device 203-1 to the water treatment device 303-1 based on a control signal from the control device 103. The water flow control device 403-2 controls the flow of tap water from the water treatment device 203-1 to the water treatment device 303-2 based on a control signal from the control device 103. The water flow control device 403-3 controls the flow of tap water from the water treatment device 203-1 to the water treatment device 303-3 based on a control signal from the control device 103. The water flow control device 503-1 controls the flow of reclaimed water from the water treatment device 203-2 to the water treatment device 303-1 based on a control signal from the control device 103. The water flow control device 503-2 controls the flow of reclaimed water from the water treatment device 203-2 to the water treatment device 303-2 based on a control signal from the control device 103. The water flow control device 503-3 controls the flow of reclaimed water from the water treatment device 203-2 to the water treatment device 303-3 based on a control signal from the control device 103. Water flow control devices 403-1 to 403-3 and 503-1 to 503-3 may each be equipped with on / off valves or opening degree adjustment valves.

[0062] In addition to the functions of the control device 100 in the first embodiment, the control device 103 has the function of selecting a source water treatment device from among the water treatment devices 203-1 and 203-2, and a destination water treatment device from among the water treatment devices 303-1 to 303-3.

[0063] Figure 11 shows an example of the components of the control device 103 shown in Figure 10. As shown in Figure 11, the control device 103 shown in Figure 10 includes a chemical information acquisition unit 113, a water quality value acquisition unit 123, a conditional water quality value acquisition unit 133, a required addition amount calculation unit 143, a difference calculation unit 153, a presentation unit 163, and a selection unit 194. Note that Figure 11 shows only the main components of the control device 103 shown in Figure 10 that are relevant to this embodiment.

[0064] The chemical information acquisition unit 113 acquires chemical information indicating the amount of chemicals added, which has been notified by the water treatment devices 203-1 and 203-2, respectively. If the water treatment devices 203-1 and 203-2 have notified the chemical information including the type of chemical, the chemical information acquisition unit 113 acquires the type of chemical. The type of chemical included in the chemical information acquired by the chemical information acquisition unit 113 is bromide salt (sodium bromide), which is added to the water to be treated for urea removal treatment in the water treatment devices 203-1 and 203-2, respectively, and remains after treatment. The chemical information acquisition unit 113 notifies the difference calculation unit 153 of the chemical information indicating the acquired type of chemical and the amount of chemical added.

[0065] The water quality acquisition unit 123 acquires the water quality values ​​of tap water or recycled water notified by the water treatment devices 203-1 and 203-2, respectively. The water quality acquisition unit 123 acquires the urea concentration value as the water quality value. The water quality acquisition unit 123 notifies the required addition amount calculation unit 143 of the acquired urea concentration value.

[0066] The conditional water quality value acquisition unit 133 acquires the water quality values ​​that are the conditions for the treated water of each water treatment device 303-1 to 303-3, which have been notified by each water treatment device 303-1 to 303-3. The conditional water quality value acquisition unit 133 acquires the urea concentration value as the water quality value. These conditions are predetermined for each water treatment device 303-1 to 303-3. For example, these conditions are the water quality standards required by semiconductor factories that use the treated water treated by each water treatment device 303-1 to 303-3. The conditional water quality value acquisition unit 133 notifies the required addition amount calculation unit 143 of the acquired urea concentration value.

[0067] The required additive amount calculation unit 143 calculates, for each combination, the amount of chemicals to be added by each of the water treatment devices 303-1 to 303-3 to the tap water or recycled water supplied from each of the water treatment devices 203-1 and 203-2 to each of the water treatment devices 303-1 to 303-3, based on the water quality values ​​notified by the water quality value acquisition unit 123 and the water quality values ​​notified by the conditional water quality value acquisition unit 133. In other words, the required additive amount calculation unit 143 calculates the amount of chemicals to be added by water treatment device 303-1 to the tap water supplied from water treatment device 203-1 to water treatment device 303-1, the amount of chemicals to be added by water treatment device 303-2 to the tap water supplied from water treatment device 203-1 to water treatment device 303-2, the amount of chemicals to be added by water treatment device 303-3 to the tap water supplied from water treatment device 203-1 to water treatment device 303-3, the amount of chemicals to be added by water treatment device 303-1 to the reclaimed water supplied from water treatment device 203-2 to water treatment device 303-2, and the amount of chemicals to be added by water treatment device 303-3 to the reclaimed water supplied from water treatment device 203-2 to water treatment device 303-3. At this time, the required addition amount calculation unit 143 calculates the amount of bromide salt to be added to the tap water or recycled water supplied by water treatment devices 203-1 and 203-2, respectively, for each of the water treatment devices 303-1 to 303-3, based on the urea concentration value notified by the water quality value acquisition unit 123 and the urea concentration value notified by the condition water quality value acquisition unit 133. Specifically, for example, the required addition amount calculation unit 143 calculates how much chemical (bromide salt) should be added to the water to be treated, which has the urea concentration notified by the water quality value acquisition unit 123, so that the urea concentration of the water to be treated becomes the urea concentration notified by the condition water quality value acquisition unit 133. The required addition amount calculation unit 143 notifies the difference calculation unit 153 of the value indicating the calculated addition amount.

[0068] The difference calculation unit 153 calculates the difference between the amount of additive notified by the required additive amount calculation unit 143 and the amount of additive of the chemical (bromide salt) indicated by the chemical information notified by the chemical information acquisition unit 113, for each of the above combinations. At this time, the difference calculation unit 153 calculates the difference for combinations in which the amount of additive notified by the required additive amount calculation unit 143 is greater than the amount of additive of the chemical (bromide salt) indicated by the chemical information notified by the chemical information acquisition unit 113. On the other hand, for combinations in which the amount of additive notified by the required additive amount calculation unit 143 is less than or equal to the amount of additive of the chemical (bromide salt) indicated by the chemical information notified by the chemical information acquisition unit 113, the difference calculation unit 153 calculates the difference as "0". The difference calculation unit 153 notifies the presentation unit 163 and the selection unit 194 of the calculated difference (amount of additive) for each combination. It goes without saying that the difference calculation unit 153 calculates the difference in the amount of chemicals added when the chemicals added by water treatment devices 203-1 and 203-2 are the same chemicals as those added by water treatment devices 303-1 to 303-3.

[0069] The selection unit 194 selects a source water treatment device from among water treatment devices 203-1 and 203-2. The selection unit 194 also selects a destination water treatment device from among water treatment devices 303-1 to 303-3. At this time, the selection unit 194 selects the combination of water treatment device 203-1 or 203-2 with the smallest difference notified by the difference calculation unit 153 and one of the water treatment devices 303-1 to 303-3 as the combination of source water treatment device and destination water treatment device. The selection unit 194 notifies the presentation unit 163 of the selected combination of source water treatment device and destination water treatment device. The selection unit 194 also controls the opening and closing or opening degree of the water flow control devices 403-1 to 403-3 and 503-1 to 503-3 respectively so that tap water or recycled water from the selected source water treatment device flows to the selected destination water treatment device.

[0070] The presentation unit 163 presents the amount of additive that the selected water treatment device will add to the water treatment device selected by the selection unit 194 from the amount of additive notified by the difference calculation unit 153. The presentation method may be the same as the presentation method performed by the presentation unit 160 in the first embodiment.

[0071] The control method for the control device 103 shown in Figure 10 will be described below. Figure 12 is a flowchart illustrating an example of the control method for the control device 103 shown in Figure 10.

[0072] First, the chemical information acquisition unit 113 acquires chemical information indicating the type of chemical and the amount of chemical added, as notified by the water treatment devices 203-1 and 203-2 respectively (step S31). Here, the chemical is a bromide salt. Next, the water quality value acquisition unit 123 acquires the water quality value of tap water or recycled water, as notified by the water treatment devices 203-1 and 203-2 respectively (step S32). Here, the water quality value acquired by the water quality value acquisition unit 123 is the urea concentration value. Next, the condition water quality value acquisition unit 133 acquires the water quality value that is the condition for the treated water of each water treatment device 303-1 to 303-3, as notified by the water treatment devices 303-1 to 303-3 respectively (step S33). Here, the condition acquired by the condition water quality value acquisition unit 133 is the urea concentration value.

[0073] Next, the required addition amount calculation unit 143 calculates the amount of chemical (bromide salt) to be added by each of the water treatment devices 303-1 to 303-3 to the tap water or recycled water supplied from each of the water treatment devices 203-1 and 203-2 to each of the water treatment devices 303-1 to 303-3, based on the water quality values ​​(urea concentration values) acquired by the water quality value acquisition unit 123 and the water quality values ​​(urea concentration values) acquired by the conditional water quality value acquisition unit 133, for each combination of water treatment devices 203-1 and 203-2 and each of the water treatment devices 303-1 to 303-3 (step S34). The specific calculation method is as described above. The difference calculation unit 153 then calculates the difference between the amount of additive calculated by the required additive amount calculation unit 143 and the amount of additive of the chemical (bromide salt) indicated by the chemical information acquired by the chemical information acquisition unit 113, for each combination of water treatment devices 203-1, 203-2 and each of water treatment devices 303-1 to 303-3 (step S35). The selection unit 194 selects the combination of water treatment device 203-1, 203-2 and water treatment devices 303-1 to 303-3 that has the smallest difference calculated by the difference calculation unit 153 as the combination of the source water treatment device and the destination water treatment device (step S36). The selection unit 194 controls the opening and closing or opening degree of the water flow control devices 403-1 to 403-3 and 503-1 to 503-3 so that tap water or recycled water from the selected source water treatment device flows to the selected destination water treatment device. The presentation unit 163 presents the amount of additive to be added by the destination water treatment device selected by the selection unit 194 from the difference amount of additive calculated by the difference calculation unit 153 (step S37).

[0074] The selection unit 194 may, based on the difference calculated by the difference calculation unit 153, select both water treatment device 203-1 and water treatment device 203-2 as the source water treatment device, select multiple water treatment devices 303-1 to 303-3 as destination water treatment devices, calculate the ratio of tap water to recycled water to be supplied to the multiple selected destination water treatment devices, and control the opening and closing or opening degree of the water flow control devices 403-1 to 403-3 and 503-1 to 503-3 respectively according to the calculated ratio. In this case, the selection unit 194 may calculate the ratio based on the difference calculated by the difference calculation unit 153, using the ratio of tap water from water treatment device 203-1 to recycled water from water treatment device 203-2 to satisfy the conditions (water quality values) required by each of the multiple selected destination water treatment devices.

[0075] In this configuration, where multiple water treatment devices are provided to supply raw water, in addition to the first embodiment, the combination that minimizes the amount of chemicals added is selected for each combination. This further reduces the amount of chemicals added. The selection unit 194 may also fix the source water treatment device and select the destination water treatment device, or fix the destination water treatment device and select the source water treatment device. Furthermore, if there are any circumstances with respect to water treatment devices 203-1, 203-2, 303-1 to 303-3, the selection unit 194 may also take those circumstances into account when making a selection. For example, such circumstances include the expectation that the amount of tap water supplied from water treatment device 203-1 will be insufficient.

[0076] Each of the control devices 100 to 103 described above may be an independent device, or it may be located in one of the water treatment devices.

[0077] The above explanation describes how each component is assigned a specific function (process), but this assignment is not limited to those described above. Furthermore, the configuration of the components described above is merely an example and is not limited to it.

[0078] The processing performed by each of the control devices 100 to 103 described above may be carried out by logic circuits created according to their respective purposes. Alternatively, a computer program (hereinafter referred to as "program") describing the processing content as a procedure may be recorded on a recording medium readable by each of the control devices 100 to 103, and the program recorded on this recording medium may be read and executed by each of the control devices 100 to 103. The recording medium readable by each of the control devices 100 to 103 refers to portable recording media such as floppy disks, magneto-optical disks, DVDs (Digital Versatile Discs), CDs (Compact Discs), Blu-ray Discs, USB (Universal Serial Bus) memory, and SD cards, as well as memory such as ROM (Read Only Memory), RAM (Random Access Memory), and HDDs (Hard Disc Drives) built into each of the control devices 100 to 103. The program recorded on this recording medium is read by a CPU (not shown) provided in each of the control devices 100 to 103, and the same processing as described above is performed under the control of the CPU. Here, the CPU operates as a computer that executes the program read from the recording medium on which the program is recorded. [Explanation of Symbols]

[0079] 100-103 Control device 110,113 Drug Information Acquisition Department 120, 122, 123 Water quality value acquisition unit 130,133 Conditional water quality value acquisition unit 140,143 Required addition amount calculation section 150,153 Difference calculation part 160,161,163 Presentation part 171 Flow rate value acquisition unit 181 Arrival time calculation section 192 Water quality measurement value acquisition unit 193 Alarm output section 194 Selection Section 200, 203-1, 203-2, 300~302, 303-1~303-3 Water treatment equipment 210,213-1,213-2,322 Water quality meter 311 Flow meter 403-1~403-3, 503-1~503-3 Water flow control device

Claims

1. A chemical information acquisition unit acquires chemical information from the first water treatment device, which indicates the amount of chemicals added to the water to be treated supplied to the first water treatment device. A water quality value acquisition unit that acquires at least one of the water quality value of the water to be treated to which the chemical has been added by the first water treatment device, and the water quality value of the water to which the chemical has been added by the second water treatment device that treats the water to which the chemical has been added by the first water treatment device, A conditional water quality value acquisition unit acquires water quality values ​​that satisfy the conditions for treated water treated by the second water treatment device, Based on the water quality values ​​acquired by the water quality value acquisition unit and the water quality values ​​acquired by the conditional water quality value acquisition unit, the required amount of chemicals to be added by the second water treatment device to the water to be treated supplied from the first water treatment device is calculated by the required amount calculation unit. A difference calculation unit calculates the difference between the amount of additive calculated by the required additive amount calculation unit and the amount of additive indicated by the chemical information acquired by the chemical information acquisition unit. A control device having a display unit that displays the amount of additive calculated by the difference calculation unit to the second water treatment device.

2. In the control device according to claim 1, The chemical information acquisition unit acquires chemical information from the first water treatment apparatus indicating that the type of chemical added to the treated water is a bromide salt and the amount of the bromide salt added. The water quality value acquisition unit and the conditional water quality value acquisition unit each acquire the urea concentration value as the water quality value. The required addition amount calculation unit is a control device that calculates the amount of bromide salt to be added by the second water treatment device to the water to be treated supplied from the first water treatment device, based on the urea concentration value obtained by the water quality value acquisition unit and the urea concentration value obtained by the condition water quality value acquisition unit.

3. In the control device according to claim 1 or claim 2, The difference calculation unit is a control device that calculates the difference when the amount of additive calculated by the required additive amount calculation unit is greater than the amount of additive indicated by the drug information acquired by the drug information acquisition unit.

4. In the control device according to claim 1 or claim 2, It has a delivery time calculation unit that calculates the time it takes for the water to be treated from the first water treatment device to reach the second water treatment device, The display unit is a control device that displays the amount of additive calculated by the difference calculation unit to the second water treatment device after the time calculated by the arrival time calculation unit.

5. In the control device according to claim 1 or claim 2, The water quality value acquisition unit acquires the water quality value measured by the water quality meter provided in the second water treatment device, A control device having an alarm output unit that outputs an alarm to the first water treatment device and the second water treatment device when the difference between the water quality value acquired by the water quality value acquisition unit and the water quality value acquired by the measured water quality value acquisition unit exceeds a predetermined value.

6. In the control device according to claim 1 or claim 2, When there are multiple first water treatment devices and multiple second water treatment devices, the system has a selection unit that selects a source water treatment device from among the multiple first water treatment devices and a destination water treatment device from among the multiple second water treatment devices. The chemical information acquisition unit acquires the chemical information from each of the multiple first water treatment devices, The conditional water quality value acquisition unit acquires the water quality values ​​from each of the plurality of second water treatment devices, The required additive amount calculation unit calculates the amount of additive in each of the multiple second water treatment devices based on the water quality values ​​obtained by the condition water quality value acquisition unit from each of the multiple second water treatment devices. The selection unit is a control device that selects the source water treatment device and the destination water treatment device based on the chemical information acquired by the chemical information acquisition unit and the amount of additive calculated by the required additive amount calculation unit.

7. In the control device according to claim 6, The difference calculation unit calculates the difference between the multiple amounts of additives calculated by the required additive amount calculation unit and the amounts of additives of the multiple chemicals indicated by each of the multiple chemical information obtained by the chemical information acquisition unit. The selection unit is a control device that selects the combination of the first water treatment device and the second water treatment device that has the smallest difference calculated by the difference calculation unit as the combination of the source water treatment device and the destination water treatment device.

8. In the control device according to claim 6, The selection unit is a control device that, when it selects a plurality of first water treatment devices as the source water treatment devices and a plurality of second water treatment devices as the destination water treatment devices, calculates the proportion of treated water supplied from each of the plurality of source water treatment devices to each of the selected destination water treatment devices based on the difference calculated by the difference calculation unit.

9. It has a water supply device that processes water to be treated to which chemicals have been added, and a control device, The control device is A chemical information acquisition unit acquires chemical information from a water supply source device that supplies water to be treated, indicating the amount of chemicals added to the water to be treated supplied to the water to be treated, the water supply source device that supplies the water to be treated to the water to be treated destination device. A water quality value acquisition unit that acquires at least one of the water quality value indicating the water quality of the water to be treated to which the chemical has been added, obtained by the water supply source device for the water to be treated, and the water quality value of the water to which the chemical has been added, A water quality value acquisition unit that acquires water quality values ​​that satisfy the conditions for treated water treated by the treated water supply device, A required addition amount calculation unit calculates the amount of chemicals to be added by the treated water supply device to the treated water supplied from the treated water source device, based on the water quality values ​​acquired by the water quality value acquisition unit and the conditional water quality value acquisition unit. A difference calculation unit calculates the difference between the amount of additive calculated by the required additive amount calculation unit and the amount of additive indicated by the chemical information acquired by the chemical information acquisition unit. The system includes a display unit that displays the amount of additive calculated by the difference calculation unit to the treated water supply device, The water treatment supply device is a water treatment system that adds the amount of chemicals indicated by the display unit to the water treatment.

10. A process for obtaining chemical information from the first water treatment device, which indicates the amount of chemicals added to the water to be treated supplied to the first water treatment device, A process to obtain at least one of the water quality value of the water to be treated to which the first water treatment device has added the chemical, and the water quality value of the water to which the second water treatment device, which treats the water to be treated to which the first water treatment device has added the chemical, has added the chemical. A process in which the first water treatment device treats the water to be treated to which the chemical has been added, and a second water treatment device obtains from the second water treatment device the water quality value that satisfies the conditions of the treated water, A process to calculate the amount of chemical to be added by the second water treatment device to the water to be treated supplied from the first water treatment device, based on the water quality values ​​obtained from the first water treatment device and the water quality values ​​obtained from the second water treatment device, A process to calculate the difference between the amount of additive calculated above and the amount of additive indicated by the acquired chemical information above, A control method that performs the process of presenting the calculated amount of additive to the second water treatment device.

11. On the computer, A procedure for obtaining chemical information from the first water treatment device, which indicates the amount of chemicals added to the water to be treated supplied to the first water treatment device, A procedure for obtaining at least one of the water quality values ​​of the treated water to which the first water treatment device has added the chemical, and the water quality values ​​of the treated water to which the second water treatment device, which treats the treated water to which the first water treatment device has added the chemical, has added the chemical; A procedure for obtaining from the second water treatment device the water to be treated, which is treated by the first water treatment device with the chemical added, the water quality value that satisfies the conditions of the treated water, A procedure for calculating the amount of chemicals to be added by the second water treatment device to the treated water supplied from the first water treatment device, based on the water quality values ​​obtained from the first water treatment device and the water quality values ​​obtained from the second water treatment device, A procedure for calculating the difference between the amount of additive calculated above and the amount of additive indicated by the acquired chemical information, A program for causing the second water treatment device to perform the procedure of presenting the calculated amount of additive to the second water treatment device.

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