Membrane cleaning system

Abstract

The utility model discloses a membrane cleaning system which comprises a cleaning tank, a membrane group to be cleaned, a circulating pipeline and a flushing pump, the cleaning tank is communicated with the membrane group to be cleaned through a liquid inlet pipeline and a liquid return pipeline to form a circulation loop; the circulating pipeline is arranged between the liquid inlet pipeline and the liquid return pipeline; the output end of the flushing pump is respectively communicated with the cleaning tank and the liquid return pipeline; and the communicating part of the flushing pump and the liquid return pipeline is positioned between the circulating pipeline and the membrane module to be cleaned. Through the arrangement, when the membrane modules to be cleaned are backwashed, the pre-liquid-medicine mixing operation can be carried out on the next membrane module to be cleaned, namely, the backwashing operation and the liquid-medicine mixing operation can be synchronously carried out, so that the time consumed for cleaning the plurality of membrane modules to be cleaned is shortened, and the cleaning efficiency of the membrane modules to be cleaned is improved. The purpose of increasing the cleaning speed is achieved.

Description

Technical Field

[0001] This utility model relates to the field of membrane cleaning, and in particular to a membrane cleaning system. Background Technology

[0002] In modern industrial production, membrane separation technology, with its advantages of high efficiency and energy saving, is widely used in many fields such as chemical engineering, pharmaceuticals, food and beverage, and wastewater treatment. Among these, SWRO membrane modules, as key membrane separation components, inevitably accumulate various pollutants on their surfaces during long-term operation, such as microorganisms, colloids, organic matter, and inorganic matter. These pollutants lead to a decrease in membrane flux and a reduction in separation performance, seriously affecting production efficiency and product quality. Therefore, regular and effective cleaning of SWRO membrane modules is crucial, and the performance of the membrane cleaning system directly determines the cleaning effect and the continuity of production.

[0003] Currently, such as Figure 1 As shown, a typical membrane module cleaning system mainly includes a cleaning tank 101, a membrane module 201 to be cleaned, a circulation pipeline 301, and a flushing pump 401. Specifically, the cleaning tank 101 and the membrane module 201 to be cleaned are interconnected via an inlet pipeline 501 and a return pipeline 601, forming a circulation loop. A CIP pump 511 is installed on the inlet pipeline 501 to provide the power for liquid transport. The flushing pump 401 is connected to the cleaning tank 101 to transport water. The membrane module cleaning system typically involves three stages during cleaning of the membrane module 201: chemical mixing, rinsing, and backwashing, as described below. Figures 2 to 4 As shown, the three stages of operation are accomplished by opening or closing the valves on the inlet pipe 501, the return pipe 601, and the circulation pipe 301.

[0004] However, practical operation revealed certain shortcomings in the aforementioned system: for example, during the backwashing phase, if... Figure 4 As shown, the flow of the liquid requires not only the operation of the flushing pump 401, but also the synchronous operation of the CIP pump 511. This undoubtedly increases the energy consumption of the equipment, and due to the mixing stage of the system's liquid, such as Figure 2 As shown, the CIP pump 511 is required to complete the process, which means that during the backwashing stage, it is impossible to prepare cleaning solutions for other membrane modules 201 to be cleaned. This results in a longer overall cleaning time and a lower cleaning rate.

[0005] Therefore, a membrane cleaning system is needed to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a membrane cleaning system that allows for the simultaneous backwashing of the membrane group to be cleaned and the pre-mixing of cleaning solutions for the next membrane group to be cleaned. In other words, the backwashing operation and the cleaning solution mixing operation can be carried out synchronously, thereby shortening the time required to clean multiple membrane groups and improving the cleaning rate.

[0007] To solve the above-mentioned technical problems, this utility model provides a membrane cleaning system, including a cleaning tank, a membrane assembly to be cleaned, a circulation pipeline, and a flushing pump;

[0008] The cleaning tank and the membrane module to be cleaned are connected by an inlet pipe and a return pipe, forming a circulation loop;

[0009] The circulation pipeline is arranged between the inlet pipeline and the return pipeline;

[0010] The output end of the flushing pump is connected to the cleaning tank and the return liquid pipeline, respectively;

[0011] The connection between the flushing pump and the return pipeline is located between the circulation pipeline and the membrane assembly to be cleaned.

[0012] Furthermore, a CIP pump and an inlet valve are sequentially installed on the inlet pipeline;

[0013] The CIP pump is located between the circulation pipeline and the cleaning tank;

[0014] The inlet valve is located between the circulation pipeline and the membrane module to be cleaned.

[0015] Furthermore, the liquid inlet pipe is also connected to a row of liquid pipes;

[0016] The drain pipe is used to discharge waste liquid during backwashing of the membrane module to be cleaned.

[0017] Furthermore, the drain pipe is located between the inlet valve and the membrane assembly to be cleaned, and a drain valve is provided on the drain pipe.

[0018] Furthermore, a first return valve and a second return valve are sequentially installed on the return pipeline;

[0019] The first return valve is located between the circulation pipeline and the membrane assembly to be cleaned;

[0020] The second return valve is located between the circulation pipeline and the cleaning tank.

[0021] Furthermore, the connection point between the flushing pump and the return pipeline is located between the first return valve and the membrane assembly to be cleaned.

[0022] Furthermore, a control valve is installed on the pipeline between the flushing pump and the cleaning tank;

[0023] A backwash valve is installed on the pipeline between the flushing pump and the return liquid pipeline.

[0024] Furthermore, a circulation valve is installed on the circulation pipeline.

[0025] Compared with the prior art, the present invention has at least the following beneficial effects:

[0026] By connecting the flushing pump to the cleaning tank and the return pipeline, when backwashing of the membrane module to be cleaned is required, the flushing pump can drive the water directly into the return pipeline to backwash the membrane module. At the same time, the flushing pump can also input the water into the cleaning tank, and with the cooperation of the valve components on the inlet pipeline, circulation pipeline and return pipeline, the chemical solution is mixed. This allows the backwashing operation and the chemical solution mixing operation to be carried out simultaneously and without interference. While completing the backwashing function of the membrane module to be cleaned, it also completes the preparatory work for the next membrane module to be cleaned. Therefore, it can effectively shorten the time required for the overall cleaning process and achieve the goal of improving the cleaning rate. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a membrane cleaning system in one embodiment of the prior art;

[0028] Figure 2 A liquid flow diagram of a membrane cleaning system during drug mixing operation in an embodiment of the prior art;

[0029] Figure 3 A liquid flow diagram of a membrane cleaning system during the cleaning of a membrane assembly in an embodiment of the prior art;

[0030] Figure 4 A liquid flow diagram of a membrane cleaning system during backwashing of the membrane assembly to be cleaned, as described in an embodiment of the prior art.

[0031] Figure 5 This is a schematic diagram of the membrane cleaning system in one embodiment of the present invention.

[0032] Reference numerals: 1. Cleaning tank; 2. Membrane module to be cleaned; 3. Circulation pipeline; 31. Circulation valve; 4. Flushing pump; 5. Inlet pipeline; 51. CIP pump; 52. Inlet valve; 53. Drain pipeline; 531. Drain valve; 6. Return pipeline; 61. First return valve; 62. Second return valve; 7. Control valve; 8. Backwash valve. Detailed Implementation

[0033] The membrane cleaning system of this utility model will now be described in more detail with reference to the schematic diagrams, which illustrate preferred embodiments of this utility model. It should be understood that those skilled in the art can modify the utility model described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the utility model.

[0034] The present invention will be described in more detail below by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0035] like Figure 5 As shown in the figure, this utility model embodiment proposes a membrane cleaning system, including a cleaning tank 1, a membrane assembly to be cleaned 2, a circulation pipeline 3, and a flushing pump 4.

[0036] The cleaning tank 1 and the membrane module 2 to be cleaned are connected by an inlet pipe 5 and a return pipe 6, forming a circulation loop to complete the function of cleaning the membrane module 2 to be cleaned.

[0037] The circulation pipeline 3 is located between the inlet pipeline 5 and the return pipeline 6, and works with the valve assemblies on the inlet pipeline 5 and the return pipeline 6 to complete the function of mixing the medicine in the cleaning tank 1 in preparation for cleaning the membrane assembly 2 to be cleaned.

[0038] It should be noted that a circulation valve 31 is provided on the circulation pipeline 3 to control the opening or closing of the circulation pipeline 3.

[0039] The output end of the flushing pump 4 is connected to the cleaning tank 1 and the return pipeline 6, respectively.

[0040] The connection between the flushing pump 4 and the return pipeline 6 is located between the circulation pipeline 3 and the membrane assembly 2 to be cleaned.

[0041] By connecting the flushing pump 4 to the cleaning tank 1 and the return line 6, when backwashing of the membrane module 2 to be cleaned is required, the flushing pump 4 can drive the water directly into the return line 6 to backwash the membrane module 2 to be cleaned. This eliminates the need for the CIP pump 51 installed on the inlet line 5, effectively reducing energy consumption.

[0042] Furthermore, at this time, water can be introduced into the cleaning tank 1 through the flushing pump 4, so that the chemical solution can be mixed in cooperation with the valve components on the inlet pipe 5, circulation pipe 3 and return pipe 6. That is, the backwashing operation and the chemical solution mixing operation can be carried out simultaneously without interference. Therefore, compared with the membrane cleaning system set in the prior art, this system can complete the backwashing function of the membrane group 2 to be cleaned, and also complete the pre-cleaning work before the next membrane group 2 to be cleaned, thereby effectively shortening the time required in the overall cleaning process and achieving the purpose of improving the cleaning rate.

[0043] It should be noted that, in this embodiment, the liquid inlet pipeline 5 is sequentially equipped with a CIP pump 51 and a liquid inlet valve 52, which are used to provide power for the liquid transport and control the liquid output path, respectively.

[0044] The CIP pump 51 is located between the circulation pipeline 3 and the cleaning tank 1, while the inlet valve 52 is located between the circulation pipeline 3 and the membrane assembly to be cleaned 2, so that the CIP pump 51 can meet the application requirements of the circulation of medicine liquid on the circulation pipeline 3.

[0045] In a further embodiment, the inlet pipe 5 is also connected to a drain pipe 53, which is used to discharge waste liquid during backwashing of the membrane module 2 to be cleaned.

[0046] It should also be noted that the drain pipe 53 is located between the inlet valve 52 and the membrane assembly 2 to be cleaned, and the drain pipe 53 is provided with a drain valve 531, so that when the inlet valve 52 is open and the drain valve 531 is closed, the liquid can circulate and clean the membrane assembly 2 to be cleaned along the inlet pipe 5 and the return pipe 6.

[0047] In other embodiments, a first return valve 61 and a second return valve 62 are sequentially provided on the return pipeline 6.

[0048] The first return valve 61 is located between the circulation pipeline 3 and the membrane assembly 2 to be cleaned, and the second return valve 62 is located between the circulation pipeline 3 and the cleaning tank 1. This ensures that when the first return valve 61 is closed and the second return valve 62 is open, the mixing of the medicine solution in the cleaning tank 1 can be completed with the cooperation of the circulation pipeline 3, thus ensuring that the system can function normally.

[0049] It should also be noted that the connection between the flushing pump 4 and the return pipeline 6 is located between the first return valve 61 and the membrane module 2 to be cleaned, so that the backwashing operation and the chemical mixing operation can be separated under the action of the first return valve 61, so as to ensure that the two can operate independently and without interference, thereby shortening the cleaning time required for the membrane module 2 to be cleaned.

[0050] In other embodiments, a control valve 7 is provided on the pipeline between the flushing pump 4 and the cleaning tank 1, and a backwash valve 8 is provided on the pipeline between the flushing pump 4 and the return pipeline 6, for controlling the flow direction of the water.

[0051] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A membrane cleaning system characterized by, The cleaning tank, the membrane group to be cleaned, the circulation pipeline and the flushing pump are included. The cleaning tank and the membrane group to be cleaned are communicated through the liquid inlet pipeline and the liquid return pipeline, and a circulation loop is formed. The circulation pipeline is arranged between the liquid inlet pipeline and the liquid return pipeline. The output end of the flushing pump is communicated with the cleaning tank and the liquid return pipeline respectively. The communication part of the flushing pump and the liquid return pipeline is located between the circulation pipeline and the membrane group to be cleaned.

2. The membrane cleaning system of claim 1, wherein, The CIP pump and the liquid inlet valve are arranged on the liquid inlet pipeline in sequence. The CIP pump is located between the circulation pipeline and the cleaning tank. The liquid inlet valve is located between the circulation pipeline and the membrane group to be cleaned.

3. The membrane cleaning system of claim 2, wherein, The liquid inlet pipeline is further connected with a liquid discharge pipeline. The liquid discharge pipeline is used for discharging waste liquid when the membrane group to be cleaned is backwashed.

4. The membrane cleaning system of claim 3, wherein, The liquid discharge pipeline is located between the liquid inlet valve and the membrane group to be cleaned, and a liquid discharge valve is arranged on the liquid discharge pipeline.

5. The membrane cleaning system of claim 1, wherein, The first liquid return valve and the second liquid return valve are arranged on the liquid return pipeline in sequence. The first liquid return valve is located between the circulation pipeline and the membrane group to be cleaned. The second liquid return valve is located between the circulation pipeline and the cleaning tank.

6. The membrane cleaning system of claim 5, wherein, The communication part of the flushing pump and the liquid return pipeline is located between the first liquid return valve and the membrane group to be cleaned.

7. The membrane cleaning system of claim 1, wherein, A control valve is arranged on the pipeline between the flushing pump and the cleaning tank. A backwashing valve is arranged on the pipeline between the flushing pump and the liquid return pipeline.

8. The membrane cleaning system of claim 1, wherein, A circulation valve is arranged on the circulation pipeline.

Images