TW202330085A - Medicament infusion system, pure water production system & pure water production method - Google Patents

Abstract

A medicament infusion system includes: a housing part in which a medication is accommodated; an infusion path for infusing the medicament in the housing part with respect to a flow path through which water to be treated flows, at an upstream side relative to a reverse osmosis membrane device provided in the flow path; and an imparting part provided at the infusion path, which imparts an impact to the medicament.

Description

Chemical injection system, pure water production system, and pure water production method

This case relates to a chemical injection system, a pure water manufacturing system and a pure water manufacturing method.

Japanese Patent Application Laid-Open No. 2021-126624 discloses an ultrapure water production system in which a slime control agent and an anti-scaling agent are injected through an injection pipe on the upstream side of a reverse osmosis membrane separation device in a pipe through which treated water flows.

The injection of slime control agent and anti-scaling agent is to dilute the slime control agent and anti-scaling agent in the tank, and inject it through the injection pipe. This method is mainly suitable for small pure water manufacturing systems. On the other hand, in a large-scale pure water production system, it is common to store the stock solution of the slime control agent and anti-scaling agent in the tank, and inject it with the injection pipe.

[Problem to be Solved by the Invention] In the ultrapure water production system disclosed in Japanese Patent Application Laid-Open No. 2021-126624, for the flow path where the water to be treated flows, with respect to the upstream side of the reverse osmosis membrane device installed in the flow path, the water is injected through the injection path. In the configuration of injecting the medicine, if the components contained in the medicine adhere to the injection path, the injection path may be blocked, and the medicine may not be injected. In particular, slime control agents and anti-fouling agents have high viscosity, and components contained in the agents may precipitate and easily adhere to the injection path.

The purpose of the present disclosure is to suppress clogging of the injection path in the case of injecting chemicals through the injection path on the upstream side of the reverse osmosis membrane device provided in the flow path where the water to be treated flows.

[Means to solve the problem] The chemical injection system of the present disclosure includes: a housing part, which accommodates the chemical agent; an injection path, for the flow path of the treated water, on the upstream side relative to the reverse osmosis membrane device arranged in the aforementioned flow path, to inject the aforementioned The said medicine of the accommodation part; and the application part, which is provided in the said injection path, and applies impact to the said medicine.

The pure water manufacturing method of the present disclosure includes: the step of injecting the agent through the injection path on the upstream side of the reverse osmosis membrane device installed in the flow path of the flow path of the water to be treated; and applying an impact to the aforementioned injection The steps of the aforementioned medicines in the route.

[Effect of Invention] Due to the above configuration, the present disclosure has the advantage of suppressing clogging of the injection path in the case of injecting chemicals through the injection path on the upstream side of the reverse osmosis membrane device provided in the flow path for the water to be treated. effect.

Hereinafter, an example of an embodiment of the present disclosure will be described with reference to the drawings.

(ultrapure water production system 10) The ultrapure water production system 10 related to this embodiment will be described below. FIG. 1 is a schematic diagram showing an example of an ultrapure water production system 10 according to this embodiment.

The ultrapure water production system 10 is an example of a pure water production system, and is a system for producing ultrapure water. This ultrapure water production system 10 includes a primary pure water device 12 and a secondary pure water device 112 as shown in FIG. 1 .

(Primary pure water device 12) As shown in Figure 1, the primary pure water device 12 is provided with a main channel 100, a treated water area (pit) 14, a first pump 18, a flow meter (FIQ) 20, a heat exchanger (HEX) 22, an activated carbon device ( AC) 24, an ultraviolet oxidation device (UV) 26, and a filter device 30. Furthermore, the primary pure water device 12 also includes a second pump 34, a first reverse osmosis membrane device (RO) 38, a deionized water area 40, an electrolytic deionization device (EDI) 42, an ion exchange resin device (MB ) 44, pure water tank 46.

The main channel 100 is an example of a channel, and is a path through which treated water flows. The main channel 100 is constituted by a pipe through which treated water flows. Next, from the upstream side of the flow direction of treated water in the main flow path 100 (hereinafter also referred to as "water flow direction") along the main flow path 100, the treated water area 14, the first pump 18, the flow rate Meter 20, heat exchanger 22, activated carbon device 24, and ultraviolet oxidizing device 26, filter device 30, second pump 34, first reverse osmosis membrane device 38, deionized water area 40, electrolytic deionization device 42 , ion exchange resin device 44, and pure water tank 46. Also, the first reverse osmosis membrane device 38 is an example of a reverse osmosis membrane device.

In addition, the primary pure water device 12 includes a second reverse osmosis membrane device (RO) 48 arranged in a branch flow path 102 branched from the first reverse osmosis membrane device 38 , and a chemical injection system 60 for injecting chemical into the main flow path 100 . The specific configuration of the drug injection system 60 is as follows.

Each device will be described below. The treated water area 14 stores treated water. The water to be treated refers to the water that has been subjected to various treatments for the production of ultrapure water, and is the raw water (water that becomes the raw material for the production of ultrapure water). As the water to be treated, for example, industrial water, tap water, ground water, river water and the like can be used. The first pump 18 is to store the treated water stored in the treated water area 14 and flow along the main channel 100 to the downstream side of the water flow direction.

The flow meter 20 measures the flow rate of the treated water flowing in the main channel 100 . The heat exchanger 22 adjusts the temperature of the treated water through heat exchange. The activated carbon device 24 removes natural organic matter, residual chlorine, trihalomethane, and the like from the water to be treated through adsorption treatment. The ultraviolet oxidizing device 26 decomposes bacteria, bacteria, etc. contained in the water to be treated through ultraviolet irradiation to perform sterilizing treatment.

The filter device 30 is provided with a filter (pre-filter, pre-filter) for filtering the water to be treated. Next, the filtering device 30 removes suspended matter such as residual chlorine, free chlorine, and particulates through filtering.

The second pump 34 is a high-pressure pump, and flows the treated water from which impurities have been removed through the filter device 30 to the first reverse osmosis membrane device 38 .

The first reverse osmosis membrane device 38 is provided with a reverse osmosis membrane through which the treated water permeates. The first reverse osmosis membrane device 38 is treated by the reverse osmosis membrane to separate the treated water from the permeated water and concentrated water that remove ions and salts. . In this way, when the water to be treated permeates the reverse osmosis membrane, scales such as silica and calcium that have not passed through the reverse osmosis membrane may adhere to the reverse osmosis membrane. In addition, there is a possibility that slime (fouling) generated by microorganisms such as bacteria and algae that have not passed through the reverse osmosis membrane will adhere to the reverse osmosis membrane. In addition, scale is precipitated from calcium or silicon dioxide dissolved in the water to be treated.

The deionized water area 40 temporarily stores the permeated water permeated through the reverse osmosis membrane of the first reverse osmosis membrane device 38 . The electrolytic deionization device 42 performs deionization while electrically regenerating the water to be treated (permeated water). The ion exchange resin device 44 removes inorganic ions from the water to be treated. The pure water tank 46 stores the primary pure water produced by the primary pure water device 12 .

As shown in FIG. 1 , the second reverse osmosis membrane device 48 is arranged in the middle of the branch flow path 102 branched from the first reverse osmosis membrane device 38 . The branch flow path 102 is a flow path through which the concentrated water separated by the first reverse osmosis membrane device 38 flows. One end is connected to the first reverse osmosis membrane device 38 and the other end is connected to the treated water area 14 . The branch flow path 102 is composed of pipes through which the treated water flows.

The second reverse osmosis membrane device 48 is provided with a reverse osmosis membrane through which the concentrated water permeates, and the second reverse osmosis membrane device 48 is treated by the reverse osmosis membrane to remove ions and salts from the concentrated water separated by the first reverse osmosis membrane device 38 The treated water is separated from the waste water (oxidized water). The waste water is stored in the waste water area 52 , and the treated water returns to the treated water area 14 .

Like this, when the concentrated water permeates through the reverse osmosis membrane of the second reverse osmosis membrane device 48, the reverse osmosis membrane of the second reverse osmosis membrane device 48 has scales such as silicon dioxide and calcium that have not passed through the reverse osmosis membrane. doubt. Furthermore, the reverse osmosis membrane of the second reverse osmosis membrane device 48 may adhere to slime (filth) generated by microorganisms such as bacteria and algae that have not passed through the reverse osmosis membrane.

(Secondary pure water device 112) The secondary pure water device 112 is arranged on the downstream side of the pure water tank 46 in the direction of water flow as shown in FIG. 1 .

In this configuration, the secondary pure water device 112 further removes impurities from the primary pure water. Next, the ultrapure water obtained through the secondary pure water device 112 is sent to the use point 120 of the use place. The ultrapure water sent to the point of use 120, the unused ultrapure water system is sent back to the pure water tank 46 unchanged, and stored in the pure water tank 46 together with the primary pure water.

(medicine injection system 60) The medicine injection system 60 is a system for injecting medicine into the main channel 100 . Specifically, as shown in FIG. 1 , the drug injection system 60 includes a branch channel 104 , a third pump 50 , a first injection unit 62 , a second injection unit 82 , and a control device 160 .

The branched channel 104 is a channel branched from the deionized water area 40 , and one end is connected to the deionized water area 40 . The branch channel 104 is a channel for taking out a part of the water to be treated stored in the deionized water area 40 . The branch flow path 104 is formed by a pipe through which the treated water flows. The third pump 50 is arranged in the branch channel 104 . The third pump 50 sends the water to be treated from the deionized water area 40 to the downstream of the branch channel 104 .

(first injection part 62) The first injection part 62 has a function of injecting the slime control agent into the main passage 100 . Specifically, the first injection unit 62 includes a first tank 70 , a first injection path 63 , a first ejector (ejector) 64 , a first flow meter (FIQ) 66 , and a first flow control valve (FCV) 68 .

The first tank 70 is an example of a container, and houses a liquid slime control agent. The slime control agent contained in the first tank 70 is an example of a chemical agent, and has a function of suppressing the generation of slime on the reverse osmosis membrane of the first reverse osmosis membrane device 38 and the reverse osmosis membrane of the second reverse osmosis membrane device 48 Function.

The use of the slime control agent is not particularly limited. Specifically, 2,2-dibromo-3-nitrilopropionamide (2,2-dibromo-3-nitrilopropionamide), 5-chloro-2-methyl- 4-isothiazolin-3-one (5-chloro-2-methyl-4-isothiazolin-3-one, C1-MIT), 2-methyl-4-isothiazolin-3-one (2-methyl- 4-isothiazolin-3-one, MIT), 4,5-dichloro-1,2-dithiolane-3-one (4,5-dichloro-1,2-dithiolane-3-one), 2- Bromo-2-nitropropane-1,3-diol (2-bromo-2-nitropropane-1,3-diol), benzisothiazoline-3-one (benzisothiazoline-3-one), glutaraldehyde (glutaraldehyde), chloramine (Chloramine), chloramine T, chloramine B, sulfamic acid, sulfamic acid and other sulfamic acid compounds, silver nitrate, silver sulfate and other silver compounds, copper sulfate, copper nitrate, etc. Nickel compounds such as copper compounds, nickel chloride, nickel sulfate, etc. Moreover, a stabilizer may be contained in a slime control agent. As this stabilizer, a pH adjuster, an inorganic salt, an oxidation inhibitor, etc. are mentioned.

The viscosity of the slime control agent at 25°C is preferably, for example, 10 mPa･s or more and 5000 mPa･s or less from the viewpoint of usability. More preferably, it is, for example, 100 mPa･s or more to 2000 mPa･s. In addition, in the case of the slime control agent, the main component is often an unstable substance, and there is a possibility that the first tank 70 gradually decomposes during storage. In addition, the stabilizer may exist in a high concentration in the slime control agent, and it may precipitate or the like, which may cause problems in the first injection path 63 .

The first injection path 63 is an example of the injection path, and is a flow path for injecting the slime control agent in the first tank 70 into the main flow path 100 . Specifically, the first injection path 63 has an injection channel 63A and an injection channel 63B.

One end of the injection flow path 63A is connected to the other end of the branch flow path 104 , and the other end is connected to the upstream side of the first reverse osmosis membrane device 38 on the main flow path 100 . Specifically, the other end of the injection channel 63A is on the main channel 100 and is connected to a portion between the filter device 30 and the second pump 34 . The injection flow path 63A is a flow path between the filter device 30 on the main flow path 100 and the second pump 34 from the other end of the branch flow path 104 .

One end of the injection channel 63B is connected to the first groove 70 , and the other end is connected to the suction port 64A of the first injector 64 . The injection channel 63B is a channel for flowing the slime control agent contained in the first tank 70 from the first tank 70 to the first injector 64 .

In the first injection path 63 , at least the flow path length of the injection flow path 63B is shorter than the flow path length of the main flow path 100 . Furthermore, in the first injection path 63, the injection flow path 63A is constituted by a pipe (injection pipe) through which the treated water flows, and the injection flow path 63B is constituted by a pipe (injection pipe) through which the slime control agent flows.

The first injector 64 is arranged in the injection channel 63A. The first injector 64 sucks the slime control agent flowing in the injection channel 63B through the suction port 64A, for example, through the suction force due to the pressure difference. Thereby, the slime control agent is supplied to the to-be-processed water which flows through 63 A of injection channels. Next, the treated water supplied with the slime control agent passes through the injection channel 63A and is injected into the main channel 100 between the filter device 30 and the second pump 34 .

The first flow meter 66 and the first flow rate adjustment valve 68 are arranged in this order in the injection channel 63B from the first tank 70 toward the first injector 64 .

The first flowmeter 66 is an example of a measuring part, and measures the flow rate of the slime control agent injected into the flow path 63B. Furthermore, the flow information of the slime control agent measured by the first flow meter 66 is sent to the control device 160 .

The first flow rate adjustment valve 68 is an example of an adjustment valve, and has an adjustment function for adjusting the flow rate of the slime control agent through an opening. The first flow rate adjustment valve 68 is also an example of an application unit, and also has a function of applying a shock to the slime control agent. The first flow rate adjustment valve 68 is described below, and its operation is controlled by the control device 160 . The first flow rate adjustment valve 68 is controlled by the control device 160 to perform the adjustment action of adjusting the flow rate of the slime control agent and the action of applying impact to the slime control agent. The specific adjustment action and application action through the first flow rate adjustment valve 68 are as follows.

As mentioned above, the first injection part 62 injects the slime control agent into the main flow path 100, on the upstream side of the first reverse osmosis membrane device 38 (specifically, between the filter device 30 and the second pump 34). . In this embodiment, as an example, the concentration of the sludge control agent in the water to be treated flowing in the main channel 100 is injected into the main channel 100 at a concentration of not less than 1 ppm and not more than 100 ppm.

Still, in this embodiment, the slime control agent is injected into the main flow path 100 through the injection flow path 63A after being diluted by the first injector 64, but the first injector 64 is arranged in the main flow path 100 without passing through the injection flow path. 63A to inject the composition is also possible.

Furthermore, the sludge control agent injected into the water to be treated flows through the main channel 100 and reaches the first reverse osmosis membrane device 38 . The slime control agent that reaches the first reverse osmosis membrane device 38 does not permeate through the reverse osmosis membrane of the first reverse osmosis membrane device 38 , is contained in the concentrated water, and flows in the branch flow channel 102 . Here, the concentration of the slime control agent contained in the concentrated water without passing through the reverse osmosis membrane of the first reverse osmosis membrane device 38 is the same as the concentration of the slime control agent in the state before reaching the first reverse osmosis membrane device 38. ratio becomes higher.

Furthermore, the concentrated water containing the slime control agent having a high concentration flows through the branch flow channel 102 and reaches the second reverse osmosis membrane device 48 . The slime control agent that has reached the second reverse osmosis membrane device 48 is contained in the wastewater without permeating through the reverse osmosis membrane of the second reverse osmosis membrane device 48 , and is discharged to the wastewater region 52 .

Also, in this embodiment, the injection channel 63B is considered as an example of the injection channel, and the main channel 100, the branch channel 104, and the injection channel 63A may be considered as an example of the channel. In this case, the first injection part 62 can be understood as a component part that injects the slime control agent into the injection channel 63A.

(second injection part 82) The second injection part 82 has a function of injecting the anti-fouling agent into the main passage 100 . Specifically, the second injection unit 82 includes a second tank 90 , a second injection path 83 , a second injector 84 , a second flow meter (FIQ) 86 , and a second flow control valve (FCV) 88 .

The second tank 90 is an example of an accommodating part, and accommodates a liquid antifouling agent. The anti-scaling agent contained in the second tank 90 is an example of a chemical agent, and has a function of suppressing the generation of scale on the reverse osmosis membrane of the first reverse osmosis membrane device 38 and the reverse osmosis membrane of the second reverse osmosis membrane device 48 .

Antifouling agents are mainly classified into phosphonic acid-based, polycarboxylic acid-based, acrylic acid-based, etc. based on the type of main components. Specifically, examples of antifouling agents include "ORPERSION" series manufactured by Organo Co., Ltd., "Flocon (registered trademark)" series manufactured by BWA Water Additives, "PermaTreat (registered trademark)" series manufactured by Nalco, The "Hypersperse (registered trademark)" series manufactured by Singularity Corporation, and the "KURIVERTE (registered trademark)" series manufactured by Kurita Industry Co., Ltd. Antiscalants may contain stabilizers. As this stabilizer, a pH adjuster, an inorganic salt, an oxidation inhibitor, etc. are mentioned.

The viscosity of the antifouling agent at 25°C is preferably, for example, 1 mPa･s or more and 5000 mPa･s or less from the viewpoint of usability. More preferably, it is, for example, 100 mPa･s or more to 2000 mPa･s. Like this, the viscosity of the antiscalant is at least higher than that of the treated water. Generally speaking, the anti-scaling agent contains a high concentration, depending on the situation, the concentration of the main component close to the saturation solubility is often the case, so there is a possibility of precipitation when it is injected into the second injection path 83 .

The second injection path 83 is an example of the injection path, and is a flow path for injecting the antiscalant agent of the second tank 90 into the main flow path 100 . Specifically, the second injection path 83 has an injection channel 83A and an injection channel 83B.

One end of the injection flow path 83A is connected to the other end of the branch flow path 104 , and the other end is connected to the upstream side of the first reverse osmosis membrane device 38 on the main flow path 100 . Specifically, the other end of the injection channel 83A is on the main channel 100 and is connected to a part between the filter device 30 and the second pump 34 . The injection flow path 83A is a flow path between the filter device 30 on the main flow path 100 and the second pump 34 from the other end of the branch flow path 104 .

One end of the injection channel 83B is connected to the second tank 90 , and the other end is connected to the suction port 84A of the second injector 84 . The injection channel 83B is a channel through which the antiscalant agent accommodated in the second tank 90 flows from the second tank 90 to the second injector 84 .

In the second injection path 83 , at least the flow path length of the injection flow path 83B is shorter than the flow path length of the main flow path 100 . Furthermore, in the second injection path 83, the injection flow path 83A is constituted by a pipe (injection pipe) through which the water to be treated flows, and the injection flow path 83B is constituted by a pipe (injection pipe) through which the antiscalant agent flows.

The second injector 84 is arranged in the injection channel 83A. The second injector 84 sucks the anti-fouling agent flowing in the injection flow path 83B through the suction port 84A, for example, through the suction force due to the pressure difference. Thereby, the anti-scaling agent is supplied to the water to be treated flowing in the injection channel 83A. Next, the water to be treated to which the antiscalant is supplied passes through the injection channel 83A and is injected into the main channel 100 between the filter device 30 and the second pump 34 .

The second flow meter 86 and the second flow rate adjustment valve 88 are arranged in this order in the injection channel 83B from the second tank 90 toward the second injector 84 .

The second flow meter 86 is an example of a measuring unit, and measures the flow rate of the anti-scaling agent injected into the flow path 83B. Furthermore, the flow information of the anti-fouling agent measured by the second flow meter 86 is sent to the control device 160 .

The second flow rate adjustment valve 88 is an example of an adjustment valve, and has an adjustment function for adjusting the flow rate of the anti-scaling agent through the opening degree. The second flow rate adjustment valve 88 is also an example of an application unit, and also has a function of applying a shock to the anti-scaling agent. The operation of the second flow rate adjustment valve 88 is controlled through the control device 160 as described below. The second flow adjustment valve 88 is controlled by the control device 160 to perform the adjustment action of adjusting the flow rate of the anti-fouling agent and the action of applying impact to the anti-fouling agent. The specific adjustment action and application action through the second flow rate adjustment valve 88 are as follows.

As mentioned above, the second injection part 82 injects the anti-fouling agent into the main flow path 100 , on the upstream side relative to the first reverse osmosis membrane device 38 (specifically, between the filter device 30 and the second pump 34 ). In this embodiment, as an example, the antiscalant agent is injected into the main channel 100 so that the concentration of the antiscalant agent in the water to be treated flowing in the main channel 100 is not less than 1 ppm and not more than 100 ppm.

Still, in this embodiment, after the anti-fouling agent is diluted by the second injector 84, it is injected into the main flow path 100 through the injection flow path 83A, but the second injector 84 is arranged in the main flow path 100 without passing through the injection flow path 83A. The composition of injection is also possible.

Still, the antiscalant injected into the water to be treated flows through the main channel 100 and reaches the first reverse osmosis membrane device 38 . The anti-scaling agent that reaches the first reverse osmosis membrane device 38 does not permeate through the reverse osmosis membrane of the first reverse osmosis membrane device 38 , is contained in the concentrated water, and flows in the branch flow channel 102 . Here, the concentration of the antiscaling agent contained in the concentrated water without permeating through the reverse osmosis membrane of the first reverse osmosis membrane device 38 is changed compared with the concentration of the antiscaling agent in the state before reaching the first reverse osmosis membrane device 38. higher.

Furthermore, the concentrated water containing the antiscalant at a high concentration flows through the branch flow channel 102 and reaches the second reverse osmosis membrane device 48 . The anti-scaling agent that has reached the second reverse osmosis membrane device 48 is contained in the wastewater without permeating through the reverse osmosis membrane of the second reverse osmosis membrane device 48 , and is discharged to the wastewater region 52 .

Furthermore, in this embodiment, the injection channel 83B is considered as an example of the injection channel, and the main channel 100, the branch channel 104, and the injection channel 83A may be considered as an example of the channel. In this case, the second injection part 82 is understood as a constituent part that injects the anti-scaling agent into the injection channel 83A.

(control device 160) The control device 160 has a control function of controlling the operations of the first flow rate adjustment valve 68 and the second flow rate adjustment valve 88 . Specifically, the control device 160 has a processor 161 , a memory 162 , a storage 163 , and a timer 164 as shown in FIG. 2 .

As the processor 161, for example, a CPU (Central Processing Unit) that is a general-purpose processor is used. Furthermore, as an example of a processor, it may be a special-purpose processor constituted by a dedicated circuit designed to execute a specific process.

The memory 163 stores various programs including the control program 163A (see FIG. 3 ), and various data. Specifically, the storage 163 is realized via recording devices such as HDD (Hard Disk Drive), SSD (Solid State Drive), and flash memory.

The memory 162 is an operating area for the processor 161 to execute various programs, and when the processor 161 executes processing, various programs or various data are temporarily recorded. The processor 161 reads various programs of the control program 163A from the storage 163 to the memory 162, and executes the programs using the memory 162 as a work area. The timer 164 is a measuring unit for measuring time such as the operating time of the ultrapure water production system 10 .

In the control device 160, the processor 161 realizes various functions by executing the control program 163A. Hereinafter, the functional structure realized by the cooperation of the processor 161 as a hardware resource and the control program 163A as a software resource will be described. FIG. 3 is a block diagram showing the functional configuration of the processor 161. As shown in FIG.

As shown in FIG. 3 , in the control device 160 , the processor 161 functions as an acquisition unit 161A, a flow rate control unit 161B, and an application control unit 161C by executing a control program 163A.

The acquisition part 161A acquires the information of the flow rate of the slime control agent measured by the 1st flowmeter 66 (it is called 1st flow rate information hereafter). In addition, the obtaining unit 161A obtains information on the flow rate of the anti-fouling agent measured by the second flow meter 86 (hereinafter referred to as second flow rate information). Furthermore, the acquisition unit 161A acquires time information (hereinafter referred to as time information) such as the operation time of the ultrapure water production system 10 measured by the timer 164 .

The flow control unit 161B controls the opening of the first flow adjustment valve 68 in a manner to maintain the flow of the slime control agent injected into the flow path 63B at a preset flow rate according to the first flow information obtained by the obtaining unit 161A. In other words, the flow control unit 161B controls the opening of the first flow meter 66 according to the measurement result of the first flow meter 66 to maintain the flow of the slime control agent injected into the flow path 63B at a preset flow.

Moreover, the flow control unit 161B controls the opening of the second flow regulating valve 88 in a manner to maintain the flow of the anti-fouling agent injected into the channel 83B at a preset flow rate according to the second flow information obtained by the obtaining unit 161A. In other words, the flow control unit 161B controls the opening of the second flow meter 86 according to the measurement result of the second flow meter 86 to maintain the flow rate of the anti-scaling agent injected into the flow path 83B at a preset flow rate.

The application control unit 161C controls (hereinafter, referred to as application control) the application of the slime control agent impacted into the injection channel 63B with respect to the first flow rate adjustment valve 68 . As a result, the first flow rate adjustment valve 68 executes an operation of applying a shock to the slime control agent injected into the flow path 63B (hereinafter, referred to as an application operation). The slime control agent to which the impact is applied includes sediments in which the components contained in the slime control agent precipitate, and a slime control agent with a high viscosity (in other words, one that hinders the flow in the injection channel 63B).

In this embodiment, the first flow rate adjustment valve 68 performs the applying action by changing between the fully closed state and the fully open state. The first flow rate adjustment valve 68 is changed to a fully closed state and a fully open state, and the moving components such as the valve body collide with the slime control agent or other components, and the impact (specifically, vibration) generated thereby is applied. For slime control agent. In this embodiment, the first flow rate adjustment valve 68 also applies impact (specifically, vibration) to the injection channel 63B and the piping (injection pipe) constituting the injection channel 63B.

Here, even if the components contained in the slime control agent do not precipitate, the high-viscosity slime control agent will stay in the injection flow path 63B, especially the first flow rate adjustment valve 68, and flow path blockage may occur ( stenosis) in the case of the problem. When this problem arises, since the flow rate of the injection flow path 63B is generally low, the problematic substance cannot be washed away, and the clogging of the flow path will worsen at this position. The place where flow path blockage is likely to occur is the flow path where the raw liquid of the drug flows, especially the position where the flow path of the first flow rate adjustment valve 68 and the like is narrowed. Therefore, the flow path where the stock solution of the slime control agent is supplied (in other words, the portion where the stock solution of the slime control agent contacts), especially the location where the first flow rate adjustment valve 68 is placed, is preferable as the location where the impact is applied.

In this embodiment, when a shock is applied through the opening and closing of the first flow rate adjustment valve 68, foreign matter adhering to the first flow rate adjustment valve 68 can be directly removed through the opening and closing action, so it is most effective. The reason for this is that the foreign matter from the slime control agent is not a simple particle, but may be sticky and form, for example, a paste-like substance. Still, although the foreign matter removed through the opening and closing action will finally flow into the main flow path 100, it will be removed by the prefilter (not shown) or the first reverse osmosis membrane device 38, which will not affect the produced pure water or ultrapure water. water.

Specifically, the first flow rate adjustment valve 68 performs an application operation by alternately and continuously changing to a fully closed state and a fully open state a plurality of times. For example, the first flow rate adjustment valve 68 is switched between the fully closed state and the fully open state within a short period of time (for example, more than 0 seconds and less than 5 seconds), and continuously changes to the fully closed state and the fully open state. In addition, the first flow rate adjustment valve 68 changes to the fully closed state from the fully open state at first, and executes the application operation.

Furthermore, in the present embodiment, the application control unit 161C controls the application of the first flow rate adjustment valve 68 when the opening degree of the first flow rate adjustment valve 68 is greater than or equal to a preset opening degree. As an example, the preset opening degree is set to a preset value within a range of 70% to 90%.

In addition, the application control unit 161C performs application control on the first flow rate adjustment valve 68 when the operation time of the ultrapure water production system 10 has reached the preset time. In other words, the application control unit 161C controls the application of the first flow rate adjustment valve 68 when the slime control agent in the first tank 70 is injected into the main channel 100 through the first injection channel 63 for a preset time. The preset time is shorter than the time when the injection channel 63B is clogged due to the injection of the slime control agent, and as an example, it is set as a preset value within the range of 24 hours to 500 hours. The preset time is preferably not less than 24 hours and not more than 500 hours, more preferably not less than 100 hours and not more than 200 hours.

In addition, the application control unit 161C controls the second flow rate adjustment valve 88 to apply the anti-scaling agent impacted into the injection channel 83B (hereinafter referred to as application control). As a result, the second flow rate adjustment valve 88 performs an operation of applying a shock to the anti-scaling agent in the injection channel 83B (hereinafter referred to as an application operation). The antiscalant to which the impact is applied includes sediments in which components contained in the antiscalant precipitate, and an antiscalant with a high viscosity (in other words, one that hinders the flow in the injection channel 83B).

In this embodiment, the second flow rate adjustment valve 88 performs the applying action by changing between the fully closed state and the fully open state. The second flow rate adjustment valve 88 is changed into a fully closed state and a fully open state, and the components of the movement of the valve body and the like collide with the anti-fouling agent or other components, and the impact (specifically, vibration) generated thereby is applied to the valve body. Antiscalant. In this embodiment, the second flow rate adjustment valve 88 also applies impact (specifically, vibration) to the injection channel 83B and the piping (injection pipe) constituting the injection channel 83B.

Here, even if the components contained in the antiscalant agent do not precipitate, the antiscalant agent with high viscosity will stay in the injection flow path 83B, especially the second flow rate adjustment valve 88, and the flow path may be clogged (narrowed). ) in the case of the problem. When this problem arises, since the flow rate of the injection flow path 83B is generally low, the problematic substance cannot be washed away, and the clogging of the flow path will worsen at this position. The place where the blockage of the flow path is likely to occur is the flow path where the raw solution of the drug flows, especially the position where the flow path of the second flow rate adjustment valve 88 and the like is narrowed. Therefore, as a location where the impact is applied, the flow path where the stock solution of the antiscalant agent is supplied (in other words, the portion where the stock solution of the antiscalant agent contacts), especially the location where the second flow rate adjustment valve 88 is disposed, is preferable.

In this embodiment, when a shock is applied through the opening and closing of the second flow rate adjustment valve 88, the foreign matter adhering to the second flow rate adjustment valve 88 can be directly removed through the opening and closing action, so it is most effective. The reason for this is that the foreign matter from the antifouling agent is not a simple particle, but may be sticky and form, for example, a paste-like substance. Still, although the foreign matter removed through the opening and closing action will finally flow into the main flow path 100, it will be removed by the prefilter (not shown) or the first reverse osmosis membrane device 38, which will not affect the produced pure water or ultrapure water. water.

Specifically, the second flow rate adjustment valve 88 performs an application operation by alternately and continuously changing to a fully closed state and a fully open state a plurality of times. For example, the second flow rate adjustment valve 88 is switched between the fully closed state and the fully open state within a short period of time (for example, more than 0 seconds and less than 5 seconds), and continuously changes to the fully closed state and the fully open state. In addition, the second flow rate adjustment valve 88 changes from the fully open state to the fully closed state at first, and executes the application operation.

Furthermore, in the present embodiment, the application control unit 161C controls the application of the second flow rate adjustment valve 88 when the opening degree of the second flow rate adjustment valve 88 is greater than or equal to a preset opening degree. As an example, the preset opening degree is set to a preset value within a range of 70% to 90%.

In addition, the application control unit 161C performs application control on the second flow rate adjustment valve 88 when the operation time of the ultrapure water production system 10 reaches the preset time. In other words, the application control unit 161C controls the application of the second flow rate adjustment valve 88 when the anti-fouling agent in the second tank 90 is injected into the main channel 100 through the second injection channel 83 for a preset time. The preset time is shorter than the time when the injection channel 83B is clogged by the injection of the antiscalant agent, and is set as a preset value within a range of 100 hours to 200 hours, for example.

Still, in this embodiment, the action of applying via the first flow rate adjustment valve 68 and the second flow rate adjustment valve 88 is performed during the operation of the ultrapure water production system 10 . In other words, without stopping the operation of the ultrapure water production system 10 , the application operation via the first flow rate adjustment valve 68 and the second flow rate adjustment valve 88 is executed.

In addition, depending on the user of the ultrapure water production system 10, the above-mentioned preset opening degree and preset time may be changed through an operation portion such as an operation panel.

In addition, the opening of the first flow rate adjustment valve 68, the flow rate measured by the first flow meter 66, and the concentration of the injection channel 63A of the slime control agent or the concentration of the main channel 100 are displayed to the user if abnormal values are displayed. In the configuration of the warning action, the warning action may be canceled during the action and within a preset period after the action is executed. The reason is that the opening, the flow rate, and the concentration may become abnormal values during the application operation and a predetermined period after the application operation is performed.

Furthermore, the opening degree of the second flow rate adjustment valve 88, the flow rate measured by the second flow meter 86, and the concentration of the injection channel 83A of the antiscalant agent or the concentration of the main channel 100 are displayed to the user when abnormal values are displayed. In the configuration of the warning action, the warning action may be canceled during the action and within a preset period after the action is executed. The reason is that the opening, the flow rate, and the concentration may become abnormal values during the application operation and a predetermined period after the application operation is performed.

(Control processing of this embodiment) Next, an example of control processing related to this embodiment will be described. FIG. 4 is a flowchart showing an example of the flow of control processing executed via the control device 160 . Still, FIG. 4 shows the control process in the first injection unit 62. Although the control process in the first injection unit 62 will be described below, the same control process as the first injection unit 62 is also executed in the second injection unit 82. .

This control process is performed by the processor 161 reading the control program 163A from the memory 163 and executing it. This control process is executed when the operation of the ultrapure water production system 10 is started, as an example.

As shown in FIG. 4 , the processor 161 starts the injection of the slime control agent in the first injection unit 62 when starting this control process (step S101 ), and then proceeds to step 102 . During the injection of the slime control agent, the processor 161 controls the first flow adjustment valve 68 according to the measurement result of the first flow meter 66 to maintain the flow rate of the slime control agent in the injection channel 63B at a preset flow rate. The opening.

In step S102, the processor 161 determines whether the operation time of the ultrapure water manufacturing system 10 has passed a preset time (step S102). As mentioned above, the preset time is shorter than the time when the injection channel 63B is clogged due to the injection of the slime control agent. For example, it is set to a preset value within the range of 100 hours to 200 hours.

When the processor 161 judges that the operating time of the ultrapure water production system 10 has passed the preset time (step S102: YES), the application of the slime control agent that impacts the injection flow path 63B is performed on the first flow regulating valve 68 Action (step S104), and reset the measurement of the running time of the ultrapure water manufacturing system 10 (step S106), and return to step S102.

When the processor 161 judges that the operation time of the ultrapure water production system 10 has not passed the preset time (step S102: NO), it moves to step S108.

In step S108 , the processor 161 determines whether the opening of the first flow regulating valve 68 is greater than or equal to a preset opening. As mentioned above, the preset opening degree is set to a preset value in the range of 70% to 90% as an example.

When the processor 161 judges that the opening degree of the first flow regulating valve 68 is greater than the preset opening degree (step S108: YES), the first flow regulating valve 68 is executed to inject the slime control agent into the injection channel 63B. (step S104), and reset the measurement of the running time of the ultrapure water manufacturing system 10 (step S106), and return to step S102.

When the processor 161 judges that the opening degree of the first flow regulating valve 68 is smaller than the preset opening degree (step S108: NO), it returns to step S102 without going through steps S104 and S106.

Also, in this embodiment, when the operation of the ultrapure water production system 10 is stopped, this control process is terminated regardless of whether any step is being executed. The above-mentioned procedure of this control process is an example, and various procedures can be used as this control process. In this control process, for example, only one of the determination in step S102 and the determination in step S108 may be performed.

(Pharmaceutical injection method in pure water production method) In this embodiment, by executing the aforementioned control process, the chemical injection method in the pure water production method for producing pure water is performed as follows. This chemical injection method constitutes a part of the pure water production method, and has an injection process and an application process.

In the injection process, for the main channel 100 where the water to be treated flows, on the upstream side relative to the first reverse osmosis membrane device 38 arranged in the main channel 100, the medicament is injected through the first injection path 63 and the second injection path 83 ( slime control agent and anti-fouling agent). During the injection of the medicine, the first flow rate adjustment valve 68 is controlled in such a way that the flow rate of the medicine in the injection channels 63B, 83B is maintained at a preset flow rate based on the measurement results of the first flowmeter 66 and the second flowmeter 86 And the opening degree of the second flow regulating valve 88.

In the application process, the action of applying the chemicals (sludge control agent and anti-fouling agent) impacted in the first injection path 63 and the second injection path 83 is performed. In this embodiment, the first flow rate adjustment valve 68 and the second flow rate adjustment valve 88 are changed into a fully closed state and a fully open state, as described above, to perform the applying operation.

(Efficacy of this embodiment) As mentioned above, if through the drug injection system 60 of this embodiment, the main channel 100 is on the upstream side relative to the first reverse osmosis membrane device 38, and the drug (viscosity) is injected through the first injection channel 63 and the second injection channel 83. mud control agent and anti-fouling agent). Next, in the chemical injection system 60 , the first flow regulating valve 68 and the second flow regulating valve 88 apply impact to the chemical (sludge control agent and anti-fouling agent) in the first injection path 63 and the second injection path 83 . Thereby, even when a component of the drug adheres to the first injection path 63 and the second injection path 83 , the component is easily peeled off from the first injection path 63 and the second injection path 83 . Therefore, clogging of the first injection path 63 and the second injection path 83 can be suppressed.

In addition, in the chemical injection system 60, the first flow rate adjustment valve 68 and the second flow rate adjustment valve 88 are changed to a fully closed state and a fully open state to apply impact to the chemical agent (sludge control agent and anti-fouling agent). Thereby, the number of parts can be reduced in the first flow rate adjustment valve 68 and the second flow rate adjustment valve 88 compared with the structure in which the application part which applies impact to the medicine is respectively provided.

In addition, in the medicine injection system 60, the first flow rate adjustment valve 68 and the second flow rate adjustment valve 88 alternately and continuously change to the fully closed state and the fully open state multiple times, so compared with the first flow rate adjustment valve 68 and the second flow rate When the adjustment valve 88 is changed to the fully closed state and the fully open state at one time, an effective impact can be applied to the chemicals (sludge control agent and anti-fouling agent).

Also, in the chemical injection system 60, since the first flow regulating valve 68 and the second flow regulating valve 88 are fully open initially, the chemical (sludge control agent and anti-fouling agent) can initially flow through the first injection path 63 and the second flow regulating valve. Second, the flow rate of the injection path 83 is relatively large. Thereby, even when a component of the drug adheres to the first injection path 63 and the second injection path 83 , the component is easily peeled off from the first injection path 63 and the second injection path 83 . Therefore, clogging of the first injection path 63 and the second injection path 83 can be suppressed.

In addition, in the medicine injection system 60, when the opening degrees of the first flow rate regulating valve 68 and the second flow rate regulating valve 88 are greater than or equal to the preset opening degrees, the first flow rate regulating valve 68 and the second flow rate regulating valve 88 are applied. Impact on the application control of chemicals (slime control agent and anti-fouling agent).

In this way, when the first flow rate adjustment valve 68 and the second flow rate adjustment valve 88 start to be clogged and the openings of the injection channels 63B and 83B become larger, an impact is applied to the chemicals (sludge control agent and antifouling agent). , which suppresses the blockage.

In addition, in the chemical injection system 60, when the operating time of the ultrapure water production system 10 is set for a predetermined time, the first flow rate adjustment valve 68 and the second flow rate adjustment valve 88 are impacted on the chemical agent (slime control). agent and antiscalant) application control.

Thereby, when the chemicals (sludge control agent and anti-scaling agent) are injected through the injection paths 63 and 83 and clogging of the injection flow paths 63B and 83B starts to occur over time, impact can be applied to the chemicals to suppress the clogging.

In addition, in the drug injection system 60 , the flow path length of at least the injection flow path 63B of the first injection path 63 is smaller than the flow path length of the main path 100 . In addition, in the second injection path 83 , at least the flow path length of the injection flow path 83B is smaller than the flow path length of the main flow path 100 .

In this way, the flow path length of the injection flow paths 63B and 83B is shorter than the flow path length of the main flow path 100, and in the configuration in which the injection flow paths 63B and 83B are prone to clogging, an impact is applied to the chemicals (sludge control agent and anti-fouling agent). ), can suppress the clogging of injection channel 63B, 83B.

As described above, in the ultrapure water production system 10 , in the chemical injection system 60 , the clogging of the injection channels 63B and 83B can be suppressed by applying an impact to the chemical. As a result, the chemical is appropriately injected into the main flow path 100, and it is possible to suppress the deterioration of the quality of pure water.

(evaluate) In this evaluation, the evaluation of "the effect of suppressing the clogging of the injection channel 63B, 83B" of the following Example 1 and Comparative Example 1 was performed.

(Example 1) In Embodiment 1, the operation of the ultrapure water production system 10 is performed while executing the aforementioned control processing as shown in FIG. 4 . In Embodiment 1, the preset time in step S102 is 168 hours. The preset opening degree in step S108 is 90% opening degree. In Embodiment 1, the applying operation is performed by alternately and continuously changing the first flow rate adjustment valve 68 and the second flow rate adjustment valve 88 to the fully closed state and the fully open state ten times. At this time, each of the fully closed state and the fully open state is switched every three seconds.

(comparative example 1) In Comparative Example 1, the operation of the ultrapure water production system 10 was performed without executing the aforementioned control process as shown in FIG. 4 . Therefore, in Comparative Example 1, the application operation of the first flow rate adjustment valve 68 and the second flow rate adjustment valve 88 was not performed.

(Evaluation results) In Example 1, the operation of the ultrapure water production system 10 was carried out. For at least three years, there was no problem of clogging in the injection channels 63B, 83B, the first flow regulating valve 68, and the second flow regulating valve 88.

On the other hand, in Comparative Example 1, the operation of the ultrapure water production system 10 was carried out for about three months. The clogging of any one position requires maintenance of at least one of the first flow rate adjustment valve 68 and the second flow rate adjustment valve 88 .

(Modification) In the present embodiment, the first flow rate adjustment valve 68 and the second flow rate adjustment valve 88 function as an example of an application unit that applies impact to the medicine, but this is not limiting. As an example of an application part, you may have the application part provided separately from the 1st flow rate adjustment valve 68 and the 2nd flow rate adjustment valve 88, for example. As the application unit, for example, a generator that generates vibrations such as ultrasonic waves, or a device in which members are in close contact with pipes constituting the injection channels 63B and 83B, or the like can be used. This generator or machine is connected, for example, to the pipes constituting the injection channels 63B, 83B.

Also, in this embodiment, the action of applying impact to the chemicals (sludge control agent and anti-fouling agent) is performed at the first flow rate adjustment valve 68 and the second flow rate adjustment valve 88, but this is not limiting. For example, the user of the ultrapure water production system 10 may perform the application operation by manually tapping the pipes constituting the injection channels 63B and 83B. Still, in these methods, although it is not expected to directly unblock through the opening and closing of the first flow rate adjustment valve 68 and the second flow rate adjustment valve 88, it can be removed by vibrating chemicals or sediment.

Also, in this embodiment, the chemical injection system 60 is used as an example of the chemical to inject the slime control agent and anti-fouling agent, but it is not limiting. For example, the chemical injection system 60 may be configured to inject one of the slime control agent and the anti-fouling agent. The chemical injection system 60 may be configured to inject at least one of the sludge control agent and the anti-fouling agent, or to inject other chemical agents (for example, a pH adjuster) instead. When injecting other medicines, the same configuration as that of the first injection part 62 and the second injection part 82 can also be used.

Also, in this embodiment, the first flow rate regulating valve 68 and the second flow rate regulating valve 88 alternately and continuously change to the fully closed state and the fully open state multiple times to perform the application operation, but this is not restrictive. The first flow rate adjustment valve 68 and the second flow rate adjustment valve 88 may be changed to a fully closed state and a fully open state at one time, for example, to execute the application operation, as long as the impact can be applied to the medicine.

Also, in this embodiment, the first flow rate adjustment valve 68 and the second flow rate adjustment valve 88 are initially fully open and then changed to a fully closed state to perform the application operation, but this is not restrictive. For example, the first flow rate adjustment valve 68 and the second flow rate adjustment valve 88 may be initially fully closed and then changed to a fully open state to perform the application operation, as long as the impact can be applied to the medicine.

Also, in this embodiment, the other end of the first injection path 63A is the part between the filter device 30 and the second pump 34 on the main flow path 100 , but it is not limited thereto. The other end of the injection channel 63A may be connected to the upstream side of the first reverse osmosis membrane device 38 on the main channel 100 . In other words, the first injection part 62 may be configured to inject the slime control agent at least upstream of the first reverse osmosis membrane device 38 .

Also, in this embodiment, the second injection path 83 is the part where the other end of the injection flow path 83A is on the main flow path 100 and connected between the filter device 30 and the second pump 34 , but it is not limiting. The other end of the injection channel 83A may be connected to the upstream side of the first reverse osmosis membrane device 38 on the main channel 100 . In other words, the second injection part 82 may be at least as long as it injects the anti-fouling agent on the upstream side with respect to the first reverse osmosis membrane device 38 .

The technology disclosed in this disclosure is not limited to the above-mentioned embodiments, and various modifications, changes, and improvements are possible within the range not departing from the gist thereof. For example, the modified examples shown above may be combined appropriately or plurally configured.

The disclosure of Japanese Patent Application No. 2021-168348 filed on October 13, 2021 is incorporated herein by reference in its entirety. All documents, patent applications, and technical specifications contained in this specification are included in this specification by reference, as they are specifically and separately described in each document, patent application, and technical specification.

The chemical injection system of the first aspect includes a container part for containing the chemical agent; for the flow channel where the water to be treated flows, on the upstream side relative to the reverse osmosis membrane device installed in the aforementioned flow channel, the aforementioned an injection path of the medicine; and an application part arranged in the injection path and applying impact to the medicine.

In the chemical injection system of the first aspect, the chemical is injected through the injection path on the upstream side of the reverse osmosis membrane device provided in the flow path in which the water to be treated flows. Next, in the drug injection system of the first aspect, the impact is applied to the drug by the application portion provided in the injection path. Thereby, even if a component of the medicine adheres to the injection path, the component is easily peeled off from the injection path. Therefore, clogging of the injection path can be suppressed.

In the second aspect of the drug injection system, in the first aspect, the aforementioned application part is provided in the aforementioned injection path, and the adjustment valve that adjusts the flow rate of the aforementioned drug through the opening degree can be changed into a fully closed state and a fully open state. A shock is applied to the aforementioned dose.

In the second aspect, the adjustment valve, which is an application part that adjusts the flow rate of the medicine through the opening degree, is changed between a fully closed state and a fully open state to apply a shock to the medicine. Thereby, the adjustment valve can reduce the number of parts compared with the structure which separately provided the application part.

In the medicine injection system according to a third aspect, in the second aspect, the application unit alternately and continuously changes to the fully closed state and the fully opened state multiple times to apply impact to the medicine.

Like this, in the third aspect, since the application part alternately and continuously changes to the fully closed state and the fully open state a plurality of times, compared with the case where the application part changes to the fully closed state and the fully open state once, it is possible to apply the medicine. effective shock.

In the drug injection system according to a fourth aspect, in the second aspect or the third aspect, the application unit is initially in the fully open state and then changes to the fully closed state to apply an impact to the drug.

In the fourth aspect, since the applicator is initially fully opened, the initial flow of the medicine in the injection path is large. Thereby, even if a component of the medicine adheres to the injection path, the component is easily peeled off from the injection path. Therefore, clogging of the injection path can be suppressed.

The drug injection system of the fifth aspect, in any one of the second to fourth aspects, further includes a measurement unit for measuring the flow rate of the aforementioned drug in the aforementioned injection path; according to the measurement of the aforementioned measurement unit As a result, the flow control unit that controls the opening of the regulating valve to maintain the flow of the medicament in the injection path at a preset flow rate; An application control unit for controlling the application of impact to the aforementioned medicine.

According to the fifth aspect, when the opening of the injection flow path starts to be blocked in the regulating valve as the application unit, the drug can be impacted to suppress the blockage.

The drug injection system of the sixth aspect, in any one of the first aspect to the fifth aspect, further includes performing injection of the aforementioned drug in the aforementioned accommodating portion through the aforementioned injection path into the aforementioned flow path at a predetermined time. In the case of , an application control unit that controls the application of an impact on the drug to the application unit.

According to the sixth aspect, when the medicine is injected through the injection channel and clogging of the injection channel starts to occur over time, the clogging can be suppressed by applying an impact to the medicine.

In the drug injection system of the seventh aspect, in any one of the first aspect to the sixth aspect, the flow path length of the injection path is shorter than the flow path length of the flow path.

As in the seventh aspect, the flow path length of the injection path is smaller than the flow path length of the flow path, and in a configuration in which the injection path is prone to clogging, the clogging can be suppressed by applying an impact to the medicine.

The pure water production system of the eighth aspect includes a flow channel for flowing water to be treated; a reverse osmosis membrane device installed in the aforementioned flow channel; The medicine injection system described in any one of the first aspect to the seventh aspect of the medicine mentioned above.

In the eighth aspect, in the drug injection system, by applying an impact to the drug, it is possible to suppress clogging of the injection path. As a result, the chemical agent is appropriately injected into the flow path, and it is possible to suppress the deterioration of the quality of pure water.

The pure water production method of the ninth aspect includes the steps of injecting a chemical agent through the injection path on the upstream side of the reverse osmosis membrane device installed in the flow path of the flow path of the water to be treated; and applying impact to the aforementioned flow path. The step of injecting the aforementioned medicines in the path.

According to the pure water production method of the ninth aspect, the chemical agent is injected through the injection path on the upstream side with respect to the reverse osmosis membrane device provided in the flow path through which the water to be treated flows. Then, an impact is applied to the medicine in the injection path. Thereby, even if a component of the medicine adheres to the injection path, the component is easily peeled off from the injection path. Therefore, clogging of the injection path can be suppressed.

The components of several embodiments are outlined above, so that those skilled in the art of the present invention can better understand the concepts of the embodiments of the present invention. Those with ordinary knowledge in the technical field of the present invention should understand that the embodiments of the present invention can be used as a basis to design or modify other processes and structures to achieve the same purpose and/or achieve the same as the embodiments described herein. the benefits of. Those skilled in the art to which the present invention pertains should understand that these equivalent constructions do not depart from the spirit and scope of the present invention, and that various modifications can be made herein without departing from the spirit and scope of the present invention. Changes, substitutions and other options. Therefore, the scope of protection of the present invention should be defined by the scope of the appended patent application.

10: Ultrapure water manufacturing system (an example of a pure water manufacturing system) 12: Primary pure water device 14: Treated water area 18: The first pump 20: flow meter 22: Heat exchanger 24: Activated carbon device 26: Ultraviolet oxidation device 30: Filtration device 34:Second pump 38: The first reverse osmosis membrane device (an example of a reverse osmosis membrane device) 40: Deionized water area 42: Electrolytic deionization device 44: Ion exchange resin device 46: pure sink 48: The second reverse osmosis membrane device 50: The third pump 52: Waste water area 60: Drug injection system 62: The first injection part 63: The first injection path (an example of the injection path) 63A: injection flow path 63B: injection flow path 64: The first injector 64A: suction port 66: The first flowmeter (an example of the measurement department) 68: First flow rate adjustment valve (an example of an application part, an example of an adjustment valve) 70: the first tank (an example of accommodating part) 82: The second injection part 83: Second injection path (an example of injection path) 83A: injection flow path 83B: injection flow path 84:Second injector 84A: suction port 86: The second flow meter (an example of the measurement part) 88: Second flow rate adjustment valve (an example of an application part, an example of an adjustment valve) 90: Second tank (an example of accommodating part) 100: main flow 102: branch flow path 104: branch flow path 112: Secondary pure water device 120: point of use 160: Control device 161: Processor 161A: Acquisition Department 161B: Flow Control Department 161C: Applied control part 162: Memory 163: Storage 163A: Control program 164: timer

The details of one or more implementations of the subject matter described in this specification are set forth in the accompanying drawings and the description below. Other features, aspects and advantages of the subject matter of this specification will be apparent from the description, drawings and claims, wherein: [ Fig. 1 ] is a schematic diagram showing an ultrapure water production system according to this embodiment. [FIG. 2] It is a block diagram which shows an example of the control apparatus of the ultrapure water manufacturing system of this embodiment. [FIG. 3] It is a block diagram which shows an example of the structure of the processing function in the control apparatus of the ultrapure water manufacturing system of this embodiment. [ Fig. 4 ] is a flowchart showing an example of the flow of control processing executed by the control device of the present embodiment.

10: Ultrapure water manufacturing system (an example of a pure water manufacturing system)

12: Primary pure water device

14: Treated water area

18: The first pump

20: flow meter

22: Heat exchanger

24: Activated carbon device

26: Ultraviolet oxidation device

30: Filtration device

34:Second pump

38: The first reverse osmosis membrane device (an example of a reverse osmosis membrane device)

40: Deionized water area

42: Electrolytic deionization device

44: Ion exchange resin device

46: pure sink

48: The second reverse osmosis membrane device

50: The third pump

52: Waste water area

60: Drug injection system

62: The first injection part

63: The first injection path (an example of the injection path)

63A: injection flow path

63B: injection flow path

64: The first injector

64A: suction port

66: The first flowmeter (an example of the measurement department)

68: First flow rate adjustment valve (an example of an application part, an example of an adjustment valve)

70: the first tank (an example of accommodating part)

82: The second injection part

83: Second injection path (an example of injection path)

83A: injection flow path

83B: injection flow path

84:Second injector

84A: suction port

86: The second flow meter (an example of the measurement part)

88: Second flow rate adjustment valve (an example of an application part, an example of an adjustment valve)

90: Second tank (an example of accommodating part)

100: main flow

102: branch flow path

104: branch flow path

112: Secondary pure water device

120: point of use

160: Control device

Claims (9)

A medicament injection system comprising: a housing part, which accommodates medicine; An injection path for injecting the chemical agent into the accommodating part on the upstream side of the reverse osmosis membrane device provided in the flow path for the flow path of the water to be treated; and The applying part is arranged in the injection path and applies impact to the medicine. The drug injection system according to claim 1, wherein the applying part is installed in the injection path, and the adjustment valve that adjusts the flow rate of the drug through the opening is changed to a fully closed state and a fully open state to apply an impact to the aforementioned potion. The drug injection system according to claim 2, wherein the application unit applies an impact to the drug by changing alternately and continuously to the fully closed state and the fully opened state a plurality of times. The drug injection system according to claim 2 or 3, wherein the application unit is initially in the fully open state and then changes to the fully closed state to apply an impact to the drug. The drug injection system as described in claim 2 or 3, further comprising: a measuring unit, which measures the flow rate of the aforementioned medicament in the aforementioned injection path; a flow control unit, which controls the opening of the adjustment valve according to the measurement result of the measurement unit, so as to maintain the flow of the medicament in the injection path at a preset flow; The application control unit controls the application unit to apply an impact to the medicine when the opening degree is equal to or greater than a preset opening degree. The drug injection system as described in any one of claim items 1-3, further comprising: The application control unit controls the application unit to apply an impact to the medicine when the medicine in the storage unit is injected into the flow path through the injection path at a predetermined time. The drug injection system according to any one of claims 1 to 3, wherein the flow path length of the injection path is smaller than the flow path length of the flow path. A pure water production system comprising: a flow path through which the treated water flows; A reverse osmosis membrane device installed in the aforementioned flow path; and The agent injection system according to any one of claims 1 to 3, wherein the agent is injected into the accommodating part on the upstream side relative to the reverse osmosis membrane device in the flow path. A method for producing pure water, comprising: For the flow path where the water to be treated flows, on the upstream side relative to the reverse osmosis membrane device provided in the aforementioned flow path, the step of injecting the chemical agent through the injection path; and A step of applying an impact to the aforementioned medicament in the aforementioned injection path.