Cartridge cleaning system

Abstract

The utility model relates to the technical field of cleaning system, concretely relates to a filter core cleaning system, and the system includes: cleaning liquid groove (1) for preparing cleaning liquid, circulating pump (2) for delivering cleaning liquid, the security filter (4) of circulating pump (2) downstream is used for placing the filter core to be cleaned, the security filter (4) inside is provided with the turbulence generator (15), is used for changing the cleaning liquid direction to the filter core to be cleaned and carries out the cleaning, and circulating pump (2) and security filter (4) top, bottom are connected through the pipeline respectively, and security filter (4) top, bottom are connected through the pipeline with cleaning liquid groove (1) respectively, the filter core cleaning system of the utility model can complete the cleaning of multiple filter cores in single time, improves the cleaning efficiency, and does not damage the filter core.

Description

Technical Field

[0001] This utility model relates to the field of cleaning system technology, and specifically to a filter element cleaning system. Background Technology

[0002] Most existing cleaning methods rely on manual cleaning. For example, patent CN216963869U discloses a reverse osmosis security filter cartridge cleaning system that uses water and spray nozzles for rinsing. This method can only clean one filter cartridge at a time, resulting in low cleaning efficiency, incomplete cleaning with blind spots, and filter cartridge damage, making it difficult to implement in industrial applications. Therefore, there is an urgent need for a high-efficiency, low-cost cleaning device and method that does not damage the filter cartridge. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a filter element cleaning system to solve the problems of the existing cleaning technology. The filter element cleaning system of this utility model can clean multiple filter elements at one time, improve cleaning efficiency, and does not damage the filter elements.

[0004] To achieve the above objectives, this utility model provides a filter element cleaning system, which includes: A cleaning solution tank is used to prepare the cleaning solution. A circulating pump is used to deliver cleaning fluid; A security filter located downstream of the circulation pump is used to hold the filter element to be cleaned. The security filter is equipped with a turbulence generator to change the direction of the cleaning fluid to clean the filter element. The circulating pump is connected to the top and bottom of the security filter via pipes, and the top and bottom of the security filter are connected to the cleaning fluid tank via pipes.

[0005] Through the above technical solution, the filter cleaning system provided by this utility model can place multiple filter elements in the security filter. The turbulence generator set in the security filter can change the water flow direction and enhance the scouring force of the water flow on the surface of the filter element. Through the circulation backwash mode, multiple filter elements can be cleaned in one go, improving cleaning efficiency and without damaging the filter elements.

[0006] This invention can clean multiple filter elements in a single wash through backwashing and cyclic rinsing, greatly improving cleaning efficiency. It features high integration, strong practicality, and can avoid membrane damage, extending the service life of the filter elements. It is suitable for large-scale industrial applications and reduces the cost of frequent membrane filter element replacement.

[0007] The present invention achieves the following technical effects: 1. Immerse the membrane filter element in the cleaning solution for circulating backwashing. During the immersion process, the filter element is continuously flushed and backwashed, which can clean the outer surface, inner surface and pores of the membrane, accelerate the removal of impurities, and will not cause secondary damage to the membrane. The membrane flux recovery rate can reach more than 95%. 2. This utility model can achieve backwashing of the membrane filter element through the "physical backwashing + chemical cleaning" mode, combining physical and chemical methods to remove dirt and blockages from the microfiltration membrane filter element; 3. By adjusting the valve opening, the flushing pressure can be controlled, the flow rate of the cleaning fluid can be adjusted, and the cleaning effect of the filter element can be observed. 4. After the microfiltration membrane filter element is placed inside the security filter, no manual operation is required. It is directly backwashed by the circulation pump, which greatly improves the cleaning efficiency and frees up labor. 5. The cleaning device in this utility model has a simple structure and the cleaning method is easy to operate. It can clean multiple filter elements at the same time, which is conducive to its widespread promotion and is suitable for industrial-scale application. Attached Figure Description

[0008] Figure 1 A schematic diagram of a filter element cleaning system provided in one embodiment of this utility model; Figure 2 This is a structural schematic diagram of a security filter provided in one embodiment of the present invention; Figure 3 This is a scanning electron microscope (SEM) image of the microfiltration membrane in the microfiltration membrane filter element before cleaning in Example 1. Figure 4 This is a scanning electron microscope (SEM) image of the microfiltration membrane in the microfiltration membrane cartridge after cleaning in Example 1.

[0009] Explanation of reference numerals in the attached figures 1-Cleaning fluid tank; 2-Circulation pump; 3-Flow meter; 4-Security filter; 5-Circulation pump outlet valve; 6-Forward wash inlet valve; 7-Backwash inlet valve; 8-Filter bottom drain valve; 9-Sampling port on backwash outlet pipe; 10-Backwash outlet valve; 11-Pressure gauge; 12-Security filter top vent valve; 13-Drain valve; 14-Filter element; 15-Turbulence generator; 16-Pressure plate; 17-Backwash inlet; 18-Forward wash outlet. Detailed Implementation

[0010] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0011] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0012] In this utility model, unless otherwise stated, the directional terms such as "upper," "lower," "top," and "bottom" used are generally based on the orientation shown in the accompanying drawings.

[0013] This utility model provides a filter element cleaning system, the system comprising: Cleaning solution tank 1, used for preparing cleaning solution; Circulation pump 2 is used to deliver cleaning fluid; The security filter 4, located downstream of the circulating pump 2, is used to hold the filter element to be cleaned. The security filter 4 is equipped with a turbulence generator 15, which is used to change the direction of the cleaning fluid to clean the filter element to be cleaned. The circulation pump 2 is connected to the top and bottom of the security filter 4 via pipes, and the top and bottom of the security filter 4 are connected to the cleaning fluid tank 1 via pipes.

[0014] Multiple filter cartridges can be placed inside the security filter. A turbulence generator is set up to change the direction of water flow and enhance the scouring force of water flow on the surface of the filter cartridges, making it easier to clean the filter cartridges more thoroughly.

[0015] According to one embodiment of the present invention, the turbulence generator 15 is a guide plate.

[0016] According to one embodiment of the present invention, the guide plate is placed horizontally along the radial direction of the security filter 4.

[0017] In this utility model, there is no particular limitation on the number of guide plates. The number can be set according to the number of filter elements to be cleaned. For example, there can be 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 plates. In this embodiment of the utility model, 4 guide plates are used as an example for illustration.

[0018] According to one embodiment of this utility model, the security filter 4 is further provided with a pressure plate 16 for fixing the filter element to be cleaned. This utility model does not have a particular limitation on the arrangement of the pressure plate, as long as it can fix the filter element to be cleaned.

[0019] According to one embodiment of the present invention, the filter element is one or more of a pleated microfiltration membrane filter element and a melt-blown microfiltration membrane filter element.

[0020] According to one embodiment of the present invention, the filter element cleaning system further includes a pressure gauge 11 disposed between the cleaning liquid tank 1 and the circulating pump 2.

[0021] According to one embodiment of the present invention, the filter cleaning system further includes a flow meter 3 disposed between the pressure gauge 11 and the security filter 4.

[0022] According to one embodiment of the present invention, a forward wash inlet valve 6 is provided on the pipe connecting the top of the circulating pump 2 and the security filter 4; a backwash inlet valve 7 is provided on the pipe connecting the bottom of the circulating pump 2 and the security filter 4; a backwash outlet valve 10 and a sampling port 9 are provided on the pipe connecting the top of the security filter 4 and the cleaning liquid tank 1; and a filter bottom drain valve 8 is provided on the pipe connecting the bottom of the security filter 4 and the cleaning liquid tank 1.

[0023] According to one embodiment of the present invention, the security filter 4 is provided with an exhaust valve 12 at the top.

[0024] According to one embodiment of the present invention, a drain valve 13 is provided at the bottom of the cleaning liquid tank 1.

[0025] According to one embodiment of the present invention, the circulating pump 2 is connected to the pressure gauge 11 through a pipeline, and the pipeline is provided with a circulating pump outlet valve 5.

[0026] This invention provides a cleaning method based on the filter element cleaning system described herein, the method comprising the following steps: 1) Place the microfiltration membrane filter element inside the high-flow security filter and close the top vent valve and bottom drain valve of the filter; 2) Prepare cleaning solution: Mix the bactericide and water at a volume ratio of 0.1-5:100 to prepare cleaning solution 1. Once the cleaning solution is ready, confirm that the drain valve at the bottom of the cleaning tank is closed. 3) Open the inlet and outlet valves of the circulation pump, and the cleaning solution I flows into the security filter, immersing the filter element in the cleaning solution I to ensure that the cleaning solution is in full contact with the dirt on the filter membrane; 4) Open the filter backwashing process, ensuring side inlet and middle outlet. Start the circulation pump via the control box button. The circulation pump outlet valve can control the flushing flow rate. Backwash for a certain period of time. 5) Replace cleaning solution II. Mix alkaline agent with clean water at a volume ratio of 1-10:100 to form cleaning solution II. Immerse the filter element in cleaning solution II and maintain the backwashing process. Start the circulation pump and backwash for a certain period of time. 6) Replace the cleaning solution III. Mix the acidic agent with clean water at a volume ratio of 0.05-0.5:100 to form the cleaning solution III. Immerse the filter element in the cleaning solution III and maintain the backwashing process. Start the circulation pump and backwash for a certain period of time. 7) After cleaning with chemical cleaning solution, rinse the filter element with clean water.

[0027] According to one embodiment of this utility model, the entry and exit of the cleaning fluid in the security filter 4 can be switched via a valve, simultaneously realizing the filter element circulation backwashing process and the normal operation process of the filter element, which is simple to operate. For example, in such Figure 1 The cleaning process is carried out in the cleaning system shown, and includes the following steps: Place the microfiltration membrane filter element into the high-flow security filter 4, and close the top exhaust valve 12 and the bottom exhaust valve 8 of the security filter 4. Prepare the cleaning solution in cleaning solution tank 1: Mix the bactericide and water at a volume ratio of 0.1-5:100 to form cleaning solution I. Once the cleaning solution is ready, confirm that the drain valve 13 at the bottom of the cleaning tank is closed. Open the inlet and outlet valves 5 of the circulation pump, and the cleaning solution I flows into the security filter 4, so that the filter element is immersed in the cleaning solution I, ensuring that the cleaning solution is in full contact with the dirt on the filter membrane; Open the backwashing process of security filter 4, ensuring side inlet and middle outlet, start circulation pump 2, circulation pump outlet valve 4 can control the flushing flow, backwash for a certain period of time; Replace with cleaning solution II. Mix alkaline agent with clean water at a volume ratio of 1-10:100 to form cleaning solution II. Immerse the filter element in cleaning solution II and maintain the backwashing process. Start circulation pump 2 and backwash for a certain period of time. Replace with cleaning solution III. Mix acidic agent and clean water at a volume ratio of 0.05-0.5:100 to form cleaning solution III. Immerse the filter element in cleaning solution III and maintain the backwashing process. Start circulation pump 2 and backwash for a certain period of time. The cleaning process is considered complete by taking samples from the sampling port on the outlet pipeline of the security filter. After the above chemical cleaning solution is used, rinse the filter element with clean water.

[0028] Preferably, the rinsing flow rate of the cleaning fluid or clean water is 1-40 m³ / h. 3 / h, preferably 15-30m 3 / h; the flushing pressure is 0-0.1MPa, preferably 0.05-0.1MPa; the flushing time is 0-2h, preferably 0.5-1h.

[0029] In this invention, the pure water flow rate of the filter element can be obtained through a forward washing process after the filter element cleaning is completed.

[0030] In the following embodiments, cleaning is performed as follows: Figure 1 The cleaning is performed in the system shown, which includes: The cleaning fluid tank 1, circulation pump 2, pressure gauge 11, flow meter 3, and security filter 4 are connected in sequence by pipes. The flow meter 3 is connected to the top and bottom of the security filter 4 through pipes respectively. The pipe connected to the top is equipped with a valve 6, and the pipe connected to the bottom is equipped with a valve 7. The bottom of the cleaning fluid tank 1 is equipped with a drain valve 13; The top and bottom of the security filter 4 are connected to the cleaning liquid tank 1 through pipes respectively. The pipe connected to the bottom is equipped with a filter bottom drain valve 8, and the pipe connected to the top is equipped with a backwash outlet valve 10 and a sampling port 9 set on the backwash outlet pipe. A circulation pump outlet valve 5 is installed on the pipeline connecting the circulation pump 2 and the pressure gauge 11; The security filter 4 is equipped with an exhaust valve 12 at its top, and also with a pressure gauge PG2; such as Figure 2 As shown, the guide plate is horizontally arranged radially inside the security filter 4. Along the vertical direction of the security filter 4, four turbulence generators 15 are alternately arranged opposite each other. The turbulence generators are guide plates. The bottom guide plate is 50 mm above the backwash inlet 17 of the security filter, and the top guide plate is 50 mm below the forward wash outlet 18 of the security filter. The other two guide plates are evenly distributed between the bottom and top guide plates.

[0031] During cleaning, filter element 14 is placed inside security filter 4.

[0032] Example 1 (1) Place 8 microfiltration membrane filter elements into the high-flow security filter 4, and close the top exhaust valve 12 and bottom exhaust valve 8 of the security filter 4; (2) NaClO was selected as the bactericidal agent and mixed with water at a volume ratio of 0.8:100 to form cleaning solution I at 0.1wt%. (3) Close the drain valve 13 at the bottom of the cleaning solution tank 1, open the inlet and outlet valves 5 of the circulation pump, and let the cleaning solution flow into the security filter 4, so that the filter element is immersed in the cleaning solution I for 10 minutes to ensure that the cleaning solution and the dirt on the filter membrane are in full contact. (4) Open the circulating pump outlet valve 5, valve 7, and backwash water circulation return backwash outlet valve 10 in sequence to open the filter backwash process; (5) Start the circulation pump through the control box. The cleaning liquid I enters the middle outlet from the side of the filter element in the security filter 4 and is discharged. Through the circulation of the pump, the filter element can be flushed and backwashed multiple times. After backwashing for 30 minutes, open the bottom drain valve 8 to drain the cleaning liquid I. (6) Close the bottom drain valve 8, and use NaOH as an alkaline agent and water in a volume ratio of 5:100 to form cleaning solution II, and use CA as an acidic agent and water in a volume ratio of 0.2:100 to form cleaning solution III. Circulate steps (2)-(5) to perform alkaline washing and acid washing. (7) During the cleaning process, the cleaning solution is sampled through the sampling port on the outlet pipeline of the security filter to determine the end of the cleaning; after the cleaning is completed, the filter element is cleaned with clean water.

[0033] (8) After cleaning with the cleaning solution, rinse the filter element with clean water for 10 minutes and test the membrane flux.

[0034] In this embodiment, the opening degree of the circulating pump outlet valve 5 is controlled to ensure that the flushing flow rate of the cleaning fluid is 25m³. 3 The flushing pressure was 0.1 MPa per hour. Scanning electron microscope (SEM) images of the microfiltration membrane before and after cleaning are shown below. Figure 3 , Figure 4 As shown, after cleaning, the filter element has only scattered and dispersed contaminants remaining, demonstrating excellent cleaning performance. Furthermore, its microstructure remains intact, with clear fiber structure and no deformation or collapse. This structural integrity ensures the filter element continues to perform its high-efficiency filtration function after cleaning, accurately intercepting impurities and particulate contaminants in subsequent use, maintaining relatively stable filtration efficiency and throughput, and effectively guaranteeing the reliability and safety of the system operation.

[0035] Example 2 The method of Example 1 differs in that cleaning solution II is a cleaning solution formed by mixing KOH as an alkaline agent with water in a volume ratio of 3:100; and cleaning solution III is a cleaning solution formed by mixing HCl as an acidic agent with water in a volume ratio of 0.2:100.

[0036] Example 3 The method of Example 1 differs in that cleaning solution I is a cleaning solution formed by mixing H2O2 as a bactericidal agent with water at a volume ratio of 0.5:100; cleaning solution II is a cleaning solution formed by mixing NaOH as an alkaline agent with water at a volume ratio of 2:100; and cleaning solution III is a cleaning solution formed by mixing CA as an acidic agent with water at a volume ratio of 0.1:100.

[0037] Example 4 The method of Example 1 differs in that cleaning solution II is a cleaning solution formed by mixing NaOH as an alkaline agent with water in a volume ratio of 3:100; and cleaning solution III is a cleaning solution formed by mixing CA as an acidic agent with water in a volume ratio of 0.3:100.

[0038] Example 5 The method of Example 3 differs in that the cleaning solution I is a cleaning solution formed by mixing H2O2 as a bactericidal agent with water in a volume ratio of 0.6:100.

[0039] The membrane flux of the cleaned filter cartridges from Examples 1-5 was tested, and the membrane flux recovery rate is shown in Table 1.

[0040] Table 1

[0041] As can be seen from the results in Table 1, the microfiltration membrane filter cartridge multi-group combined cleaning equipment and cleaning method provided by this utility model have a good cleaning effect. That is, the filter cartridge cleaning method provided by this utility model can restore the membrane flux of the filter cartridge to a large extent after cleaning, and has the performance of being reusable, while ensuring that the filter cartridge structure is not damaged.

[0042] The preferred embodiments of this utility model have been described in detail above; however, this utility model is not limited thereto. Within the scope of the technical concept of this utility model, various simple modifications can be made to the technical solution of this utility model, including combining the various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed by this utility model and are all within the protection scope of this utility model.

Claims

1. A filter element cleaning system, characterized in that, The system includes: Cleaning solution tank (1), used for preparing cleaning solution; Circulation pump (2) is used to deliver cleaning fluid; The security filter (4) located downstream of the circulating pump (2) is used to place the filter element to be cleaned. The security filter (4) is equipped with a turbulence generator (15) to change the direction of the cleaning fluid to clean the filter element to be cleaned. The top and bottom of the circulating pump (2) and the security filter (4) are connected by pipes, and the top and bottom of the security filter (4) are connected by pipes to the cleaning liquid tank (1).

2. The filter element cleaning system according to claim 1, characterized in that, The turbulence generator (15) is a guide plate.

3. The filter element cleaning system according to claim 2, characterized in that, The guide plate is set horizontally along the radial direction of the security filter (4).

4. The filter element cleaning system according to claim 1 or 2, characterized in that, The security filter (4) is also equipped with a pressure plate (16) for fixing the filter element to be cleaned.

5. The filter element cleaning system according to claim 1 or 2, characterized in that, Filter cartridges: pleated microfiltration membrane cartridges and / or melt-blown microfiltration membrane cartridges.

6. The filter element cleaning system according to claim 1 or 2, characterized in that, The filter cleaning system also includes a pressure gauge (11) located between the cleaning liquid tank (1) and the circulation pump (2).

7. The filter element cleaning system according to claim 6, characterized in that, The filter cleaning system also includes a flow meter (3) disposed between the pressure gauge (11) and the security filter (4).

8. The filter element cleaning system according to claim 1 or 2, characterized in that, A forward wash inlet valve (6) is provided on the pipe connecting the top of the circulation pump (2) and the security filter (4); a backwash inlet valve (7) is provided on the pipe connecting the bottom of the circulation pump (2) and the security filter (4). The security filter (4) is equipped with a backwash outlet valve (10) and a sampling port (9) on the pipe connecting the top of the security filter (4) to the cleaning liquid tank (1); the security filter (4) is equipped with a filter bottom drain valve (8) on the pipe connecting the bottom of the security filter (4) to the cleaning liquid tank (1).

9. The filter element cleaning system according to claim 1 or 2, characterized in that, The security filter (4) is equipped with an exhaust valve (12) on top; and / or The bottom of the cleaning fluid tank (1) is equipped with a drain valve (13).

10. The filter element cleaning system according to claim 6, characterized in that, The circulating pump (2) is connected to the pressure gauge (11) through a pipeline, and the pipeline is equipped with a circulating pump outlet valve (5).

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