Reverse osmosis microbial pollution treatment method and system

Abstract

The invention relates to the technical field of water treatment, in particular to a reverse osmosis microbial pollution treatment method and a reverse osmosis microbial pollution treatment system. The filter is controlled to be switched between the oxidation sterilization state and the reduction state, and meanwhile working information of the filter is monitored; and judging whether the filter element needs to be replaced according to the working information. According to the reverse osmosis microbial pollution treatment system and method provided by the invention, the security filter comprises two sets of independent filtering membrane shells, so that continuous operation of reverse osmosis equipment can be realized; oxidative chlorine-containing reverse osmosis inlet water passes through one set of security filter membrane shell and is in an oxidation sterilization state, no additional chemicals are needed, the microbial pollution condition of the security filter is effectively inhibited, and the quality of reverse osmosis water supply is ensured; a mode of adding a reducing agent after medium-pressure ultraviolet sterilization is adopted to replace a traditional non-oxidizing bactericide, so that the dosage of the reducing agent is reduced while sterilization is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment, and in particular to a reverse osmosis microbial contamination treatment method and system. Background Art

[0002] As the "blood" of thermal power units, water safety for the entire plant is of vital importance. Reverse osmosis is a common water treatment technology widely used in the power industry. However, many power plants currently have varying degrees of reverse osmosis membrane microbial contamination. On the one hand, it leads to problems such as a decrease in system desalination rate, increased water production pressure, and frequent membrane cleaning, which seriously threatens the water safety of the entire plant. On the other hand, it will also shorten the service life of the reverse osmosis membrane and the security filter element, and increase operating costs. The main reason for the frequent occurrence of membrane microbial contamination is that microorganisms reproduce rapidly and can revive and regenerate, and it is very easy to breed on the surface of the membrane and the security filter element to form biological slime, which is difficult to completely remove. In addition, organic matter can easily become nutrients for microbial reproduction.

[0003] In order to prevent reverse osmosis microbial contamination, power plants generally use the method of adding bactericides. By adding sodium hypochlorite before ultrafiltration, microbial contamination of the ultrafiltration system can be effectively prevented. Sodium hypochlorite is highly oxidizing and will cause irreversible oxidative damage to the reverse osmosis membrane, reducing the service life of the membrane. Therefore, it is necessary to add a reducing agent before reverse osmosis to remove the oxidizing residual chlorine in the water, and at the same time add a non-oxidizing bactericide. Non-oxidizing bactericides are expensive, complex in composition, easy to pollute water quality, and the bactericidal effect is far less than that of oxidizing bactericides. The reverse osmosis security filter is to prevent large particles of impurities in the water from entering the reverse osmosis and prevent them from clogging and contaminating the reverse osmosis membrane. The security filter generally adopts a stainless steel cylindrical integrated design with a filtration accuracy of 5um. When the pressure difference increases, the reverse osmosis must be stopped and the filter element must be removed and replaced, which cannot meet the needs of continuous operation of reverse osmosis. Adding a reducing agent before the security filter, the oxidizing bactericide cannot effectively sterilize it. Summary of the invention

[0004] In view of the problems existing in the above-mentioned existing reverse osmosis microbial contamination treatment methods, the present invention is proposed.

[0005] Therefore, the object of the present invention is to provide a method for treating reverse osmosis microbial contamination.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a method for treating reverse osmosis microbial contamination, comprising:

[0007] At least two filters are provided in parallel;

[0008] Control the filter to switch between oxidation sterilization and reduction states, and monitor the working information of the filter at the same time;

[0009] Determine whether the filter element needs to be replaced based on the working information.

[0010] As a preferred embodiment of the reverse osmosis microbial contamination treatment method of the present invention, the fluid is sterilized by medium-pressure ultraviolet before entering the filter; and a reducing agent is added to the fluid after the fluid is sterilized by medium-pressure ultraviolet.

[0011] As a preferred scheme of the reverse osmosis microbial contamination control method of the present invention, wherein: the set value range of the operating pressure difference is 0.10-0.15MPa, and the working information is the operating pressure difference of the filter; the operating pressure difference is the difference between the fluid pressure at the inlet end and the fluid pressure at the outlet end of the filter. When the operating pressure difference is greater than the set value, it indicates that the filter element needs to be isolated and replaced.

[0012] The present invention also proposes a reverse osmosis microbial contamination treatment system, which adopts the above reverse osmosis microbial contamination treatment method; it comprises:

[0013] a filtration unit comprising at least two filters;

[0014] The water supply unit comprises a first water supply module and a second water supply module, wherein the first water supply module and the second water supply module are connected to each filter;

[0015] A water outlet unit, comprising a first water outlet module for delivering filtered liquid, a second water outlet module for discharging waste liquid, and a third water outlet module connected to the second water delivery module, wherein the first water outlet module, the second water outlet module, and the third water outlet module are connected to each filter;

[0016] The second water supply module is provided with a first pressure gauge, and the first water outlet module is provided with a second pressure gauge;

[0017] The second water delivery module is connected to a reducing agent adding module;

[0018] By controlling different water supply modules and different water outlet modules, the filter in the filter unit is controlled to switch between oxidation sterilization and reduction states.

[0019] As a preferred solution of the reverse osmosis microbial pollution control system of the present invention, it also includes a water pipeline, and the water pipeline is connected to the first water supply module and the second water supply module.

[0020] As a preferred solution of the reverse osmosis microbial pollution control system of the present invention, wherein: the first water supply module includes a first water supply trunk line and at least two first water supply branches connected to the first water supply trunk line;

[0021] The first water supply trunk line is provided with a first valve, the number of the first water supply branch lines is equal to the number of filters and is connected to the filters one by one, and each of the first water supply branch lines is provided with a valve.

[0022] As a preferred solution of the reverse osmosis microbial pollution control system of the present invention, wherein: the second water supply module includes a second water supply trunk line and at least two second water supply branches connected to the second water supply trunk line;

[0023] A fourth valve is arranged on the second water supply trunk line, the number of the second water supply branch lines is equal to the number of filters and is connected to the filters one by one, and each of the second water supply branch lines is arranged with a valve;

[0024] The reducing agent adding module is arranged on the second water supply trunk line.

[0025] As a preferred solution of the reverse osmosis microbial pollution control system of the present invention, wherein: the first water outlet module includes first water outlet branches equal in number to the number of filters and connected one by one, and a first water outlet trunk line connected to the first water outlet branches;

[0026] The first pressure gauge is arranged on the second water supply trunk line, and the second pressure gauge is arranged on the first water outlet trunk line.

[0027] As a preferred solution of the reverse osmosis microbial pollution control system of the present invention, the third water outlet module includes third water outlet branches, which are equal to the number of filters and connected one by one, and a third water outlet trunk line connected to the third water outlet branches;

[0028] The third water outlet trunk line is connected to the second water supply trunk line.

[0029] As a preferred solution of the reverse osmosis microbial pollution control system of the present invention, wherein: a first online residual chlorine meter is arranged on the second water supply trunk line, and a second online residual chlorine meter is arranged on the second water outlet module.

[0030] Beneficial effects of the present invention: Compared with the prior art, the reverse osmosis microbial contamination control system and method proposed in the present invention, the security filter includes two sets of independent filter membrane shells, which can realize the continuous operation of the reverse osmosis equipment; the reverse osmosis water containing oxidizing chlorine passes through one set of security filter membrane shells, so that it is in an oxidizing sterilization state, without the need to add additional chemicals, effectively inhibiting the microbial contamination of the security filter and ensuring the quality of reverse osmosis water supply; the method of adding a reducing agent after medium-pressure ultraviolet sterilization is adopted to replace traditional non-oxidizing sterilants, thereby ensuring sterilization while reducing the amount of reducing agent added. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0032] Figure 1 This is a structural diagram of each unit in the reverse osmosis microbial pollution control system of the present invention.

[0033] Figure 2 This is a structural diagram of each module in the reverse osmosis microbial pollution control system of the present invention.

[0034] Figure 3 This is a detailed structural diagram of the reverse osmosis microbial pollution control system of the present invention.

[0035] Figure 4 This is a fluid flow diagram of the first safety filter in the oxidation and sterilization state of the present invention.

[0036] Figure 5 This is a fluid flow diagram of the first safety filter in the flushing state of the present invention.

[0037] Figure 6 This is a fluid flow diagram of the second safety filter in the oxidation and sterilization state of the present invention. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0040] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0041] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0042] Example 1 provides a method for treating reverse osmosis microbial contamination, comprising:

[0043] S1. Set at least two filters in parallel;

[0044] During application, the incoming water can be selected to enter the interior of any one of the matched filters. In this embodiment, the number of filters is two, and the incoming water can enter the interiors of the two filters respectively.

[0045] S2, control the filter to switch between oxidation sterilization and reduction states;

[0046] Under normal conditions, one of the two filters maintains an oxidizing and sterilizing state, while the other maintains a reducing state. The incoming water is controlled to first enter the inner side of the filter in the oxidizing and sterilizing state. After the fluid passes through this filter, a reducing agent is added and then transported to the interior of the filter in the reducing state.

[0047] Every 24 to 36 hours, the filter in the oxidation and sterilization state is switched to the reduction state, and the filter in the reduction state is switched to the oxidation and sterilization state. In this way, both sets of membrane shells can be oxidized and sterilized without stopping the machine to prevent the growth of microorganisms.

[0048] S3, simultaneously monitoring the working information of the filter; judging whether the filter element needs to be replaced according to the working information;

[0049] The working information is the operating pressure difference of the filter; the operating pressure difference is the difference between the fluid pressure at the inlet end and the fluid pressure at the outlet end of the filter. When the operating pressure difference is greater than the set value, it indicates that the filter element needs to be isolated and replaced. The setting value range of the operating pressure difference is 0.10~0.15MPa.

[0050] Before the fluid enters the filter, it is sterilized by medium-pressure ultraviolet sterilization; after the fluid is sterilized by medium-pressure ultraviolet sterilization, a reducing agent is added to the fluid. The method of adding a reducing agent after medium-pressure ultraviolet sterilization is adopted to replace the traditional non-oxidizing bactericide, thereby ensuring sterilization while reducing the amount of reducing agent added.

[0051] Example 2, reference Figures 1 to 6 , this embodiment is different from the first embodiment in that: this embodiment also proposes a reverse osmosis microbial contamination treatment system, which adopts the above-mentioned reverse osmosis microbial contamination treatment method; it includes a filtration unit 100, including at least two filters; Figure 2 In this embodiment, the filter unit 100 includes two security filters, namely a first security filter 101 and a second security filter 102 .

[0052] The reverse osmosis microbial contamination control system includes a water supply unit 200, including a first water supply module 201 and a second water supply module 202. The first water supply module 201 and the second water supply module 202 are connected to each filter; the first water supply module 201 and the second water supply module 202 can respectively transport water to the first security filter 101 and the second security filter 102.

[0053] The reverse osmosis microbial pollution control system includes a water outlet unit 300, including a first water outlet module 301 for conveying filtered liquid, a second water outlet module 302 for discharging waste liquid, and a third water outlet module 303 connected to the second water supply module 202. The first water outlet module 301, the second water outlet module 302, and the third water outlet module 303 are connected to each filter; the second water supply module 202 is provided with a first pressure gauge 700, and the first water outlet module 301 is provided with a second pressure gauge 800; the second water supply module 202 is connected to a reducing agent adding module 400; by controlling different water supply modules and different water outlet modules, the filter in the filter unit 100 is controlled to switch between oxidation sterilization and reduction states. Every 24 to 36 hours, the filter in the oxidation sterilization state is switched to the reduction state, and the filter in the reduction state is switched to the oxidation sterilization state. In this way, the two sets of membrane shells can be oxidized and sterilized without stopping the machine to prevent the growth of microorganisms.

[0054] The first water outlet module 301 is used to transport the treated water to the subsequent water supply pipeline, the third water outlet module 303 is used to construct a circulation channel in the system, and the second water outlet module 302 can discharge waste water.

[0055] Specifically, it also includes a water pipe 900, which is connected to the first water supply module 201 and the second water supply module 202. Figure 2 The water pipe 900 is provided with a water inlet valve 901 and a medium-pressure ultraviolet sterilization device 902. The water inlet valve 901 is used to transport water into the system, and the medium-pressure ultraviolet sterilization device 902 can sterilize the water.

[0056] Furthermore, the first water supply module 201 includes a first water supply trunk line 201a and at least two first water supply branches 201b connected to the first water supply trunk line 201a; a first valve 201c is arranged on the first water supply trunk line 201a, the number of first water supply branches 201b is equal to the number of filters and is connected to the filters one by one, and each first water supply branch line 201b is arranged with a valve.

[0057] like Figure 3There are two first water supply branches 201b, and valves are provided on the two first water supply branches 201b. The second valve 201d is installed on the first water supply branch 201b connected to the first safety filter 101, and the third valve 201e is installed on the first water supply branch 201b connected to the second safety filter 102.

[0058] Furthermore, the second water supply module 202 includes a second water supply trunk line 202a and at least two second water supply branches 202b connected to the second water supply trunk line 202a; a fourth valve 202c is arranged on the second water supply trunk line 202a, the number of second water supply branches 202b is equal to the number of filters and is connected to the filters one by one, and each second water supply branch line 202b is provided with a valve; the reductant adding module 400 is arranged on the second water supply trunk line 202a, wherein a fifth valve 202d is installed on the second water supply branch line 202b connected to the first safety filter 101, and a sixth valve 202e is installed on the second water supply branch line 202b connected to the second safety filter 102.

[0059] Furthermore, the first water outlet module 301 includes first water outlet branches 301a, which are equal to the number of filters and connected one by one, and a first water outlet trunk line 301b connected to the first water outlet branch lines 301a; the first pressure gauge 700 is arranged on the second water supply trunk line 202a, and the second pressure gauge 800 is arranged on the first water outlet trunk line 301b, wherein the first water outlet branch line 301a connected to the first safety filter 101 is installed with an eighth valve 301c, and the first water outlet branch line 301a connected to the second safety filter 102 is installed with an eleventh valve 301d.

[0060] Furthermore, the third water outlet module 303 includes third water outlet branches 303a, which are equal to the number of filters and connected one by one, and a third water outlet trunk line 303b connected to the third water outlet branches 303a; the third water outlet trunk line 303b is connected to the second water supply trunk line 202a.

[0061] Among them, the seventh valve 303c is installed on the third water outlet branch line 303a connected to the first safety filter 101, and the tenth valve 303d is installed on the third water outlet branch line 303a connected to the second safety filter 102. In addition, the second water outlet module 302 also includes two second water outlet branches 302a connected to the first safety filter 101 and the second safety filter 102 respectively, the second water outlet branch line 302a connected to the first safety filter 101 is installed with a ninth valve 302b, and the second water outlet branch line 302a connected to the second safety filter 102 is installed with a twelfth valve 302c.

[0062] Furthermore, a first online residual chlorine meter 500 is provided on the second water supply trunk line 202a, a second online residual chlorine meter 600 is provided on the second water outlet module 302, an online ORP meter 202g is also installed on the second water supply trunk line 202a, and a pipeline mixer 202f is also provided on the second water supply trunk line 202a after the reductant addition module 400, wherein all valves are electric valves.

[0063] Under normal operation: two sets of security filters operate simultaneously, one set maintains oxidation sterilization state filtering, and the other set maintains reduction state pre-reverse osmosis filtering. Taking the first security filter 101 in oxidation sterilization state and the second security filter in reduction state as an example, the system keeps the first valve 201c, the second valve 201d, the sixth valve 202e, the seventh valve 303c, and the eleventh valve 301d open, and the third valve 201e, the fourth valve 202c, the fifth valve 202d, the eighth valve 301c, the ninth valve 302b, the tenth valve 303d, and the twelfth valve 302c closed. Figure 4 The water inlet process is: incoming water pipeline 900 → medium-pressure ultraviolet sterilization device 902 → first valve 201c → second valve 201d → first safety filter 101 → seventh valve 303c → adding reducing agent after fourth valve 202c → pipeline mixer 202f → first online residual chlorine meter 500 → online ORP meter 202g → first pressure gauge 700 → sixth valve 202e → second safety filter 102 → eleventh valve 301d → second pressure gauge 800 → first water outlet module 301.

[0064] After the medium-pressure ultraviolet sterilization, the reducing agent is added to the water pipe 900. The amount of reducing agent added is automatically adjusted according to the measurement data of the first online residual chlorine meter 500 and the online ORP meter 202g to ensure that the relevant measurement indicators meet the water quality requirements of the water pipe 900, and then fully mixed after passing through the pipeline mixer 202f. The difference between the first pressure gauge 700 and the second pressure gauge 800 is the operating pressure difference of the security filter. When the pressure difference reaches 0.10-0.15MPa or more, it needs to be isolated and replaced online.

[0065] Switching process: The system will regularly switch the two sets of security filters, once every 24 to 36 hours, to ensure that both sets of membrane shells can be oxidized and sterilized to prevent the growth of microorganisms. Taking the switching of the second security filter 102 to the oxidation and sterilization state as an example, it is necessary to isolate it online first. First, based on the above steps, open the fourth valve 202c, the fifth valve 202d, and the ninth valve 302b, and close the first valve 201c and the second valve 201d.

[0066] like Figure 5, water inlet process: water pipeline 900→medium pressure ultraviolet sterilization device 902→fourth valve 202c→add reducing agent→pipeline mixer 202f→first online residual chlorine meter 500→online ORP meter 202g→first pressure gauge 700, and then it is divided into two routes; one route is the fifth valve 202d→first safety filter 101→ninth valve 302b→second online residual chlorine meter 600→drainage; the other route is the sixth valve 202e→second safety filter 102→eleventh valve 301d→second pressure gauge 800→first water outlet module 301, first flush the first safety filter 101, and when the indication value of the second online residual chlorine meter 600 is less than 0.05mg / L, the flushing is qualified.

[0067] At this time, open the eighth valve 301c, close the ninth valve 302b, and the water from the first safety filter 101 enters the first water outlet module 301. Then close the sixth valve 202e and the eleventh valve 301d to complete the online isolation and exit of the second safety filter 102. At this time, the first safety filter 101 operates alone. If the pressure difference of the second safety filter 102 does not exceed the control range, it will be switched to the oxidation and sterilization state, open the first valve 201c, the third valve 201e, and the tenth valve 303d, and close the fourth valve 202c to complete the switch. Figure 6 The water inlet process is: water pipeline 900 → medium-pressure ultraviolet sterilization device 902 → first valve 201c → third valve 201e → second safety filter 102 → tenth valve 303d → add reducing agent after fourth valve 202c → pipeline mixer 202f → first online residual chlorine meter 500 → online ORP meter 202g → first pressure gauge 700 → fifth valve 202d → first safety filter 101 → eighth valve 301c → second pressure gauge 800 → first water outlet module 301.

[0068] Compared with the traditional method, it can realize the continuous operation of the reverse osmosis equipment, and effectively control the microbial contamination of the security filter by regularly switching the online oxidation sterilization state. There is no need to add additional agents. The medium-pressure ultraviolet sterilization is followed by the addition of a reducing agent. The medium-pressure ultraviolet sterilization device 902 inactivates the microorganisms in the water while decomposing a part of the residual chlorine and organic matter, reducing the TOC content in the water. The reduction of residual chlorine is also conducive to reducing the amount of reducing agent added.

[0069] The rest of the structure is the same as that of Example 1.

[0070] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0071] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0072] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0073] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for treating reverse osmosis microbial contamination, characterized in that: include, At least two filters are provided in parallel; Control the filter to switch between oxidation sterilization and reduction states, and monitor the working information of the filter at the same time; Determine whether the filter element needs to be replaced based on the working information.

2. The reverse osmosis microbial pollution control method according to claim 1, characterized in that: Before the fluid enters the filter, the fluid is sterilized by medium-pressure UV; After the fluid is sterilized by medium pressure UV, a reducing agent is added to the fluid.

3. The reverse osmosis microbial pollution control method according to claim 2, characterized in that: The working information is the operating pressure difference of the filter; The operating pressure difference is the difference between the fluid pressure at the inlet end and the fluid pressure at the outlet end of the filter. When the operating pressure difference is greater than the set value, it indicates that the filter element needs to be isolated and replaced. The setting value range of the operating pressure difference is 0.10 to 0.15 MPa.

4. A reverse osmosis microbial pollution control system, characterized in that: A reverse osmosis microbial contamination treatment method according to any one of claims 1 to 3; These include, A filtration unit (100) comprising at least two filters; The water supply unit (200) comprises a first water supply module (201) and a second water supply module (202), wherein the first water supply module (201) and the second water supply module (202) are connected to each filter; The water outlet unit (300) comprises a first water outlet module (301) for conveying filtered liquid, a second water outlet module (302) for discharging waste liquid, and a third water outlet module (303) connected to the second water delivery module (202), wherein the first water outlet module (301), the second water outlet module (302), and the third water outlet module (303) are connected to each filter; The second water supply module (202) is provided with a first pressure gauge (700), and the first water outlet module (301) is provided with a second pressure gauge (800); The second water supply module (202) is connected to a reducing agent adding module (400); By controlling different water supply modules and different water outlet modules, the filter in the filter unit (100) is controlled to switch between the two states of oxidation sterilization and reduction.

5. The reverse osmosis microbial pollution control system according to claim 4, characterized in that: It also includes a water supply pipeline (900), wherein the water supply pipeline (900) is connected to the first water supply module (201) and the second water supply module (202).

6. The reverse osmosis microbial pollution control system according to claim 4 or 5, characterized in that: The first water supply module (201) comprises a first water supply trunk line (201a) and at least two first water supply branch lines (201b) connected to the first water supply trunk line (201a); A first valve (201c) is provided on the first water supply trunk line (201a), the number of the first water supply branch lines (201b) is equal to the number of filters and is connected to the filters one by one, and each of the first water supply branch lines (201b) is provided with a valve.

7. The reverse osmosis microbial pollution control system according to claim 6, characterized in that: The second water supply module (202) comprises a second water supply trunk line (202a) and at least two second water supply branch lines (202b) connected to the second water supply trunk line (202a); A fourth valve (202c) is provided on the second water supply trunk line (202a); the number of the second water supply branch lines (202b) is equal to the number of filters and is connected to the filters one by one; and each of the second water supply branch lines (202b) is provided with a valve; The reducing agent adding module (400) is arranged on the second water supply trunk line (202a).

8. The reverse osmosis microbial pollution control system according to claim 7, characterized in that: The first water outlet module (301) comprises first water outlet branches (301a) whose number is equal to the number of filters and which are connected one by one, and a first water outlet trunk line (301b) connected to the first water outlet branches (301a); The first pressure gauge (700) is arranged on the second water supply trunk line (202a), and the second pressure gauge (800) is arranged on the first water outlet trunk line (301b).

9. The reverse osmosis microbial pollution control system according to claim 8, characterized in that: The third water outlet module (303) comprises third water outlet branches (303a) whose number is equal to the number of filters and which are connected one by one, and a third water outlet trunk line (303b) connected to the third water outlet branches (303a); The third water outlet trunk line (303b) is connected to the second water supply trunk line (202a).

10. The reverse osmosis microbial pollution control system according to claim 8 or 9, characterized in that: The second water supply trunk line (202a) is provided with a first online residual chlorine meter (500), and the second water outlet module (302) is provided with a second online residual chlorine meter (600).

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