Concentrated concentrated solution supply filter flushing system

Abstract

The utility model relates to a centralized concentrated solution supply filter flushing system. The system comprises a filter element filter, a micron filter and an endotoxin filter, a first four-way electromagnetic valve is arranged between the filter element filter and the micron filter, a second four-way electromagnetic valve is arranged at the downstream of the endotoxin filter, and a filtering back-flushing pipeline is arranged between the first four-way electromagnetic valve and the second four-way electromagnetic valve; the second four-way electromagnetic valve is connected with a primary filtering liquid outlet pipeline, and the primary filtering liquid outlet pipeline is connected with a water inlet pipeline. According to the utility model, the technical problem that the existing endotoxin filter cannot be effectively washed daily can be solved, and the cleaning frequency of the filter in a concentrated solution supply system can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a centralized concentrated liquid supply filter flushing system. BACKGROUND

[0002] Referring to Figure 1 , the filter core flushing structure in the existing centralized concentrated liquid supply equipment includes: positive flushing and back flushing of the upper sending filter device 6a. When positive flushing, the process is: after water is filled in the liquid preparation tank 1a, the circulating pump 4a is opened and the second three-way valve 5a is opened, the pure water flows through the filter, and then returns to the liquid preparation tank 1a through the downstream liquid supply end closed third three-way ball valve 7a, the one-way ball valve 11a and the top closed first three-way ball valve 2a.

[0003] When back flushing, the process is: the water inlet valve 10a and the top opened first three-way ball valve 2a are opened, the pure water enters the filter in reverse after passing through the downstream liquid supply end closed third three-way ball valve 7a, and then flows through the second three-way valve 5a and the circulating pump 4a, and is drained through the two-way drain valve 3a in the opened state.

[0004] The endotoxin filter device 12a cannot be daily flushed.

[0005] The filter core flushing mode in the existing centralized concentrated liquid supply equipment has the following problems:

[0006] 1. The endotoxin filter device cannot be daily flushed.

[0007] 2. The endotoxin filter device needs to be cleaned separately, and all the concentrated liquid in the liquid storage tank and the liquid supply pipeline needs to be drained and pushed out before cleaning, so that the filter cleaning frequency is low. CONTENT OF THE INVENTION

[0008] The present application aims to provide a centralized concentrated liquid supply filter flushing system, which can solve the technical problem that the existing endotoxin filter cannot be effectively daily flushed, and can improve the cleaning frequency of the filter in the concentrated liquid supply system.

[0009] In order to achieve the above-mentioned purpose, the present application provides a centralized concentrated liquid supply filter flushing system, which comprises: a filter core filter, a micron filter and an endotoxin filter;

[0010] A first four-way electromagnetic valve is arranged between the filter core filter and the micron filter, a second four-way electromagnetic valve is arranged downstream of the endotoxin filter, and a filter back flushing pipeline is arranged between the first four-way electromagnetic valve and the second four-way electromagnetic valve.

[0011] The second four-way electromagnetic valve is connected with a primary filtration outlet pipeline, and the primary filtration outlet pipeline is connected with a water inlet pipeline.

[0012] In an optional embodiment, an inlet water electromagnetic valve is arranged upstream of the intersection of the inlet water pipeline and the primary filtrate pipeline, and an inlet water tee electric ball valve is connected to the inlet water pipeline.

[0013] In an optional embodiment, a solution preparation barrel is further included, one side of the inlet water tee electric ball valve is connected to the solution preparation barrel through a pipeline, and the other side is connected to an upward feeding pipeline, and an upward feeding electric ball valve is arranged on the upward feeding pipeline.

[0014] In an optional embodiment, a solution preparation circulating pump is connected to the bottom of the solution preparation barrel through a solution preparation barrel filtrate pipeline, and a solution preparation circulating filtrate pipeline is connected to the solution preparation circulating pump, and a filter cartridge filter is arranged on the solution preparation circulating filtrate pipeline.

[0015] In an optional embodiment, a solution preparation barrel drain pipeline is connected to the solution preparation barrel filtrate pipeline, and a solution preparation barrel drain valve is arranged on the solution preparation barrel drain pipeline.

[0016] In an optional embodiment, a solution preparation circulating electric ball valve is arranged upstream of the filter cartridge filter on the solution preparation circulating filtrate pipeline, and the filter cartridge filter is arranged between the solution preparation circulating electric ball valve and the first four-way electromagnetic valve.

[0017] In an optional embodiment, a cross-bridge short circuit pipeline is arranged between the first four-way electromagnetic valve and the second four-way electromagnetic valve, and the cross-bridge short circuit pipeline is used to deliver the solution preparation through the filter cartridge filter to the primary filtrate pipeline.

[0018] In an optional embodiment, a micrometer filter and an endotoxin filter are arranged in sequence on the filter backwashing pipeline, a liquid storage unit is arranged downstream of the upward feeding pipeline, the liquid storage unit is used to receive the concentrated solution after primary filtration, a precision filtration inlet liquid pipeline is connected to the first four-way electromagnetic valve, and the precision filtration inlet liquid pipeline can communicate with the filter backwashing pipeline through the first four-way electromagnetic valve.

[0019] In an optional embodiment, a precision filtration outlet liquid pipeline is connected to the second four-way electromagnetic valve, and the precision filtration outlet liquid pipeline is used to deliver the concentrated solution after precision filtration to a downstream dialysis machine concentrated solution pipeline.

[0020] In an optional embodiment, a control unit is further included, and the valves on different pipelines are electric control valves, and the electric control valves are electrically connected to the control unit.

[0021] By setting the first four-way electromagnetic valve between the filter cartridge filter and the micron filter, and setting the second four-way electromagnetic valve downstream of the endotoxin filter, and combining the filter backwashing pipeline between the first four-way electromagnetic valve and the second four-way electromagnetic valve, the filter cartridge filter, the micron filter and the endotoxin filter can be cleaned at the same time, and the series connection of different filters of forward flushing and backwashing can be compatible.

[0022] The primary filtrate pipeline connected with the second four-way electromagnetic valve can perform forward drainage of forward flushing and reverse liquid inlet of backwashing. By connecting the primary filtrate pipeline with the water inlet pipeline, reverse water inlet through the primary filtrate pipeline during backwashing can be realized. In combination with the series connection path formed by the two four-way electromagnetic valves and the filter backwashing pipeline, the filter cartridge filter, the micron filter and the endotoxin filter can be backwashed at the same time.

[0023] By the centralized concentrated liquid filter flushing system in the utility model, the open circuit flow direction of the first four-way electromagnetic valve and the second four-way electromagnetic valve and the opening and closing of the necessary water inlet and liquid outlet valves can be controlled, so that the mode switching of forward flushing and backwashing can be realized, and the filter cartridge filter, the micron filter and the endotoxin filter can be cleaned at the same time, so that the cleaning frequency of the filter is greatly improved, and the water consumption and the risk of secondary pollution to other structure pipelines are reduced.

[0024] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0026] Figure 1 It is a structural composition schematic view of the filter cartridge flushing structure in the existing centralized concentrated liquid equipment.

[0027] Figure 2 It is a structural composition schematic view of the filter flushing system of the centralized concentrated liquid filter in the present application.

[0028] Icon:

[0029] 1a-liquor preparation tank; 2a-first three-way ball valve; 3a-two-way drain valve; 4a-circulating pump; 5a-second three-way valve; 6a-upward sending filtration device; 7a-third three-way ball valve; 8a-liquid storage unit; 9a-dialysis machine concentrated liquid pipeline; 10a-water inlet valve; 11a-one-way ball valve; 12a-endotoxin filtration device;

[0030] 1 - water inlet solenoid valve; 2 - liquid preparation barrel; 3 - water inlet three-way electric ball valve; 4 - up sending electric ball valve; 5 - liquid preparation barrel drainage valve; 6 - liquid preparation circulating pump; 7 - liquid preparation circulating electric ball valve; 8 - filter cartridge filter; 9 - first four-way solenoid valve; 10 - micron filter; 11 - endotoxin filter; 12 - second four-way solenoid valve;

[0031] 13 - filter backwash pipeline; 14 - primary filtrate pipeline; 15 - water inlet pipeline; 16 - up sending pipeline; 17 - liquid preparation barrel outlet pipeline; 18 - liquid preparation circulating outlet pipeline; 19 - liquid preparation barrel drainage pipeline; 20 - cross-bridge short circuit pipeline; 21 - fine filter inlet pipeline; 22 - fine filter outlet pipeline. DETAILED DESCRIPTION

[0032] To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0033] In the description of the present application, it should be noted that the positions or location relationships indicated by the terms "inner", "outer" and the like are based on the positions or location relationships shown in the drawings, or the positions or location relationships commonly placed when the products of the present application are used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated devices or elements must have a particular position, be constructed and operated in a particular position, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium, or can be connected inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0035] The centralized concentrated liquid filter flushing system in the present application is mainly used for flushing the filters in the centralized concentrated liquid system of the dialysis machine. Specifically, by setting necessary pipeline structures and valves, simultaneous cleaning of multiple filters on different flow paths during one flushing is realized.

[0036] Referring to Figure 2 , and in combination with Figure 1The centralized concentrated liquid supply filter flushing system in the utility model, including: filter core filter 8, micron filter 10 and endotoxin filter 11, the centralized concentrated liquid supply system is first filtered by filter core filter 8 during the liquid preparation process, and the prepared liquid after primary filtration is sent to Figure 1 The prepared liquid after primary filtration is stored in the liquid storage unit 8a shown, and then the prepared liquid after primary filtration is refined by micron filter 10 and endotoxin filter 11, and finally delivered to Figure 1 The dialysis machine concentrated liquid supply pipeline 9a shown.

[0037] In the application, the filter core filter 8, the micron filter 10 and the endotoxin filter 11 are mainly flushed, including two different processes of forward flushing and back flushing.

[0038] A first four-way electromagnetic valve 9 is arranged between the filter core filter 8 and the micron filter 10, and the first four-way electromagnetic valve 9 includes two different valve paths, one side of which is used for downstream delivery of the prepared liquid after primary filtration, and the other side is used for delivery of the prepared liquid in the liquid storage unit 8a to the micron filter 10 and the endotoxin filter 11.

[0039] Thus, the prepared liquid after primary filtration by the first four-way electromagnetic valve 9 is delivered, and the prepared liquid in the liquid storage unit 8a is refined and supplied to the micron filter 10 and the endotoxin filter 11.

[0040] A second four-way electromagnetic valve 12 is arranged downstream of the endotoxin filter 11, and similarly, the second four-way electromagnetic valve 12 includes two different valve paths, one side of which is used for downstream delivery of the concentrated liquid after refinement to the dialysis machine concentrated liquid supply pipeline 9a, and the other side is used for delivery of the prepared liquid after primary filtration to the liquid storage unit 8a.

[0041] Thus, the prepared liquid after primary filtration by the second four-way electromagnetic valve 12 is delivered, and the prepared liquid after primary filtration is delivered to the liquid storage unit 8a.

[0042] By arranging a filter back flushing pipeline 13 between the first four-way electromagnetic valve 9 and the second four-way electromagnetic valve 12, forward flushing and back flushing operations can be performed by changing the valve paths of the first four-way electromagnetic valve 9 and the second four-way electromagnetic valve 12. During forward flushing, the flushing pure water is diverted after passing through the filter core filter 8 relative to normal operation, so that the flushing pure water is delivered from the first four-way electromagnetic valve 9 to the micron filter 10 and the endotoxin filter 11, and then the flushing pure water is discharged through the second four-way electromagnetic valve 12 connected to the second four-way electromagnetic valve 12 via the primary filtration liquid pipeline 14.

[0043] The primary filtrate outlet pipeline 14 is connected with a water inlet pipeline 15, which can make the washing pure water in the process of positive washing pass through the primary filtrate outlet pipeline 14 into the water inlet pipeline 15, and then pass through the water inlet pipeline 15 into the solution preparation barrel 2 of the centralized concentrated solution supply system of the dialysis machine, and on the other hand, can introduce the washing pure water in the process of backwashing, so that the washing pure water in the water inlet pipeline 15 reversely enters the second four-way electromagnetic valve 12 after the valve route is turned.

[0044] The washing pure water in the process of backwashing passes through the second four-way electromagnetic valve 12, then flows through the filtration backwashing pipeline 13 and reversely washes the endotoxin filter 11 and the micron filter 10 in the direction from right to left, Figure 2 and finally reversely washes the filter core filter 8 through the first four-way electromagnetic valve 9 after the valve route is turned, and then reaches the solution preparation barrel drainage pipeline 19 of the solution preparation circulating pump 6 to be externally discharged through the solution preparation barrel drainage valve 5.

[0045] In one specific embodiment, the water inlet pipeline 15 is provided with a water inlet electromagnetic valve 1 upstream of the intersection point with the primary filtrate outlet pipeline 14, and the water inlet pipeline 15 is connected with a water inlet three-way electric ball valve 3.

[0046] Further, the centralized concentrated solution supply filter washing system further comprises the solution preparation barrel 2, one side of the water outlet end of the water inlet three-way electric ball valve 3 is connected with the solution preparation barrel 2 through a pipeline, and the other side of the water outlet end is connected with an upward pipeline 16, and the upward pipeline 16 is provided with an upward electric ball valve 4.

[0047] The water inlet electromagnetic valve 1 is mainly used to provide the supply of washing pure water in the process of positive washing and backwashing, and the water inlet three-way electric ball valve 3 is used to control whether the washing pure water is supplied into the solution preparation barrel 2.

[0048] During the process of positive washing, the washing pure water needs to be first introduced into the solution preparation barrel 2, and the solution preparation circulating pump 6 connected with the bottom of the solution preparation barrel 2 is used to raise the pressure of the washing pure water, so that the positive washing described above can be carried out under a certain pressure state, and the washing waste liquid after the positive washing is finally discharged through the solution preparation barrel drainage pipeline 19.

[0049] Specifically, the bottom of the solution preparation barrel 2 is connected with the solution preparation circulating pump 6 through a solution preparation barrel outlet pipeline 17, which is used to provide the washing pure water to the solution preparation circulating pump 6.

[0050] The solution preparation circulating pump 6 is connected with a solution preparation circulating outlet pipeline 18, and during the process of backwashing, the solution preparation circulating pump 6 is in a stop state. The filter core filter 8 is arranged on the solution preparation circulating outlet pipeline 18, which can reversely wash the filter core filter 8 through the washing pure water after the pressure is raised, and can make the washing pure water in the process of backwashing pass through the filter core filter 8 in the reverse direction and then pass through the solution preparation circulating pump 6 into the solution preparation barrel drainage pipeline 19.

[0051] Based on the discharge needs of the flushing waste liquid, the liquid preparation barrel discharge pipeline 19 is connected to the liquid preparation barrel outlet pipeline 17, the liquid preparation barrel discharge valve 5 is arranged on the liquid preparation barrel discharge pipeline 19, the opening and closing of the liquid preparation barrel discharge valve 5 can be controlled to control the on-off of the liquid preparation barrel discharge pipeline 19, preferably, the positive flushing process is preferably the state of circulating flushing of the flushing pure water in the liquid preparation barrel 2, the liquid preparation circulating pump 6 and the filter, when the flushing waste water is introduced into the liquid preparation barrel 2 after completing the positive flushing, the pump is stopped, and the liquid preparation barrel discharge valve 5 is opened to discharge the flushing waste liquid.

[0052] And in the backwashing process, the pump is stopped, and the liquid preparation barrel discharge valve 5 is in the normally open state, the flushing waste water is reversely introduced into the second four-way electromagnetic valve 12 through the water inlet pressure of the water inlet pipeline 15 to perform the backwashing operation, until the backwashing waste water is discharged through the liquid preparation barrel discharge pipeline 19.

[0053] The liquid preparation circulating electric ball valve 7 is arranged on the upstream of the filter element filter 8 of the liquid preparation circulating outlet pipeline 18, which can control the on-off of the liquid preparation circulating outlet pipeline 18, thereby facilitating the control of the delivery of the bidirectional flow flushing pure water and the backflow.

[0054] The filter element filter 8 is arranged between the liquid preparation circulating electric ball valve 7 and the first four-way electromagnetic valve 9, which can perform normal liquid preparation preliminary filtration and positive flushing on one hand, and can realize the flow of flushing pure water in the backwashing state on the other hand.

[0055] The cross-bridge short circuit pipeline 20 is arranged between the first four-way electromagnetic valve 9 and the second four-way electromagnetic valve 12, which is used for delivering the preliminary filtered liquid preparation through the filter element filter 8 to the preliminary filtration outlet pipeline 14, and then into the liquid preparation barrel 2 through the water inlet pipeline 15.

[0056] The micron filter 10 and the endotoxin filter 11 are arranged on the filter backwashing pipeline 13 in sequence, the filter backwashing pipeline 13 mainly plays three roles, one is to deliver the preliminary filtered liquid preparation in the liquid storage unit 8a into the micron filter 10 and the endotoxin filter 11, the second is to supply the flushing pure water from the first four-way electromagnetic valve 9 to the second four-way electromagnetic valve 12 during the positive flushing, and the third is to supply the flushing pure water from the second four-way electromagnetic valve 12 to the first four-way electromagnetic valve 9 during the reverse flushing.

[0057] The downstream of the upward pipeline 16 is provided with a liquid storage unit 8a, which is used for receiving the preliminary filtered concentrated liquid, the first four-way electromagnetic valve 9 is connected with a fine filtration inlet pipeline 21, the fine filtration inlet pipeline 21 can communicate with the filter backwashing pipeline 13 through the first four-way electromagnetic valve 9, and is used for realizing the effective operation of normal filtration, positive flushing and backwashing.

[0058] The second four-way electromagnetic valve 12 is connected with a fine filtration outlet pipeline 22, which is used for conveying the concentrated liquid after fine filtration to the downstream dialysis machine concentrated liquid supply pipeline 9a.

[0059] The centralized concentrated liquid filter flushing system further comprises a control unit, the valves on different pipelines are electric control valves, all the electric control valves are electrically connected with the control unit, and preferably, the control unit comprises a PLC control unit, and automatic operation of normal filtration, forward flushing and back flushing can be realized through writing of a program control step.

[0060] During operation, filter flushing can be performed before and after work every day, and the filter cleaning process comprises:

[0061] The forward flushing process is as follows: after water is supplied to the liquid preparation barrel 2 through the water inlet electromagnetic valve 1 and the water inlet three-way electric ball valve 3, the liquid preparation circulating electric ball valve 7, the first four-way electromagnetic valve 9 and the second four-way electromagnetic valve 12 are opened, and the liquid preparation circulating pump 6 is started to perform forward flushing on the filter core filter 8, the micron filter 10 and the endotoxin filter 11.

[0062] The back flushing process is as follows: the water inlet three-way electric ball valve 3 is opened, the upper delivery electric ball valve 4 is kept in a closed state, the liquid preparation circulating pump 6 is stopped, the first four-way electromagnetic valve 9 and the second four-way electromagnetic valve 12 after turning are opened, the liquid preparation circulating electric ball valve 7 and the liquid preparation barrel drain valve 5 are opened, then the water inlet electromagnetic valve 1 is opened, and flushing pure water enters the second four-way electromagnetic valve 12 from the primary filtration outlet pipeline 14 to perform back flushing on the endotoxin filter 11 and the micron filter 10 in turn, then back flushing is performed on the filter core filter 8 after flowing through the first four-way electromagnetic valve 9, and finally the flushing waste water is discharged through the liquid preparation barrel drain valve 5.

[0063] Through the centralized concentrated liquid filter flushing system, filter cleaning can be performed before and after work every day, only the first four-way electromagnetic valve 9, the second four-way electromagnetic valve 12 and necessary pipeline valves need to be controlled, flushing waste water will not enter the liquid storage and supply system, and the cleaning frequency can be greatly improved.

[0064] The filter core filter 8, the micron filter 10 and the endotoxin filter 11 can be cleaned at the same time, and repeated waste of flushing pure water is avoided.

[0065] The forward flushing preliminarily cleans the pipeline, the liquid preparation barrel 2 and the filter, and when the filter is back flushed, impurities are directly discharged from the liquid preparation barrel drain valve 5 below the liquid preparation barrel 2, so that secondary pollution of the pipeline and the liquid preparation barrel 2 is avoided.

[0066] The filter back flushing is increased, flushing pure water enters from the outlet of the filter and exits from the inlet of the filter, so that the impurities on the filter core in the filter can be more easily flushed and removed.

[0067] The endotoxin filter 11 can be cleaned without affecting the concentration of the concentrated solution in the storage and supply system, and the forward flushing and back flushing can be performed respectively.

[0068] It should be noted that the features of the embodiments in the present application can be combined with each other without conflict.

[0069] The above only describes the preferred embodiments of the present application and is not used to limit the present application. Various modifications and changes can be made by those skilled in the art based on the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A centralized concentrated liquid filter flush system, characterized by, It comprises: a filter core filter, a micron filter and an endotoxin filter; a first four-way electromagnetic valve is arranged between the filter core filter and the micron filter, a second four-way electromagnetic valve is arranged downstream of the endotoxin filter, and a filter backwashing pipeline is arranged between the first four-way electromagnetic valve and the second four-way electromagnetic valve; The second four-way electromagnetic valve is connected with a primary filtrate pipeline, and the primary filtrate pipeline is connected with a water inlet pipeline.

2. The centralized concentrated liquid filter flush system of claim 1, wherein, An inlet water electromagnetic valve is arranged upstream of the intersection point of the water inlet pipeline and the primary filtrate pipeline, and an inlet water three-way electric ball valve is connected to the water inlet pipeline.

3. The centralized concentrated liquid filter flush system of claim 2, wherein, It also includes a solution preparation barrel, one side of the inlet water three-way electric ball valve is connected to the solution preparation barrel through a pipeline, and the other side is connected with an upward pipeline, and an upward electric ball valve is arranged on the upward pipeline.

4. The centralized concentrated liquid filter flush system of claim 3, wherein, A solution preparation circulating pump is connected to the bottom of the solution preparation barrel through a solution preparation barrel outlet pipeline, and the solution preparation circulating pump is connected with a solution preparation circulating outlet pipeline, and the filter core filter is arranged on the solution preparation circulating outlet pipeline.

5. The centralized concentrated liquid filter flush system of claim 4, wherein, A solution preparation barrel drainage pipeline is connected to the solution preparation barrel outlet pipeline, and a solution preparation barrel drainage valve is arranged on the solution preparation barrel drainage pipeline.

6. The centralized concentrated liquid filter flush system of claim 4, wherein, A solution preparation circulating electric ball valve is arranged upstream of the filter core filter on the solution preparation circulating outlet pipeline, and the filter core filter is arranged between the solution preparation circulating electric ball valve and the first four-way electromagnetic valve.

7. The centralized concentrated liquid filter flush system of claim 1, wherein, A cross-bridge short circuit pipeline is arranged between the first four-way electromagnetic valve and the second four-way electromagnetic valve, which is used to deliver the solution preparation through the filter core filter to the primary filtrate pipeline.

8. The centralized concentrated liquid filter flush system of claim 4, wherein, The micron filter and the endotoxin filter are arranged in sequence on the filter backwashing pipeline, a liquid storage unit is arranged downstream of the upward pipeline, which is used to receive the concentrated solution after primary filtration, and a precision filtration inlet pipeline is connected to the first four-way electromagnetic valve, which can be communicated with the filter backwashing pipeline through the first four-way electromagnetic valve.

9. The centralized concentrated liquid filter flush system of claim 1, wherein, The second four-way electromagnetic valve is connected with a precision filtration outlet pipeline, which is used to deliver the concentrated solution after precision filtration to the downstream dialysis machine for concentrated solution pipeline.

10. The centralized concentrated liquid filter flush system of claim 1, wherein, It also includes a control unit, and the valves on different pipelines are electrically controlled valves, which are electrically connected with the control unit.

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