Flat sheet membrane cleaning system

Abstract

The utility model discloses a flat sheet membrane cleaning system which comprises a cleaning barrel, the cleaning barrel is connected with a first feed liquid barrel and a second feed liquid barrel in parallel; a flat sheet membrane pool is arranged at the output end of the cleaning barrel, and the output end of the flat sheet membrane pool is connected with the cleaning barrel, so that cleaning liquid is circulated; the concentration of the cleaning agent is adjusted and the retention rate of the membrane is calculated through the conductivity sensor, the membrane flux is calculated in real time through weight change, key parameters such as operation pressure, temperature, membrane flux and membrane retention rate can be automatically recorded according to operation parameters, the parameter change of the system is monitored, and the concentration of the cleaning agent is automatically controlled according to the conductivity. And the precise control of the concentration of the membrane cleaning agent and the precise dosage are realized, so that the membrane cleaning speed and efficiency are improved, the field CIP cleaning is simulated, and the application range is wide.

Description

Technical Field

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

[0002] Membrane filtration is a solid-liquid separation technology. Based on the size of particles retained in the raw water, filtration membranes can be classified into microfiltration (MF), ultrafiltration (UF), nanofiltration (NF), and reverse osmosis (RO). In the food industry, membrane filtration technology is commonly used to process milk in dairy processing. However, due to the accumulation of proteins, fats, minerals, and other components on the membrane surface or in the pores, the membrane's performance gradually declines during the processing of milk, whey, and other materials. Therefore, regular cleaning of the membrane using in-situ cleaning (CIP) methods is necessary. Specialized equipment can be used to test the cleaning effectiveness of different types of membranes under various temperature, pressure, and flow rate conditions, as well as the cleaning performance and compatibility of different cleaning agents.

[0003] Currently, most existing flat-sheet membrane experimental equipment uses the method of directly pouring clean water into the cleaning solution, resulting in low experimental efficiency and a tendency for inaccurate cleaning agent dosage. Furthermore, since the equipment is primarily designed for evaluating the performance of new membranes, inaccurate cleaning agent dosage, coupled with the failure to select appropriate cleaning agents and concentrations in subsequent use, can shorten the membrane's lifespan. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a flat membrane cleaning system.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a flat membrane cleaning system, comprising:

[0006] Cleaning bucket;

[0007] The first liquid tank and the second liquid tank are connected in parallel to the cleaning tank;

[0008] The output end of the cleaning tank is equipped with a flat plate membrane tank, and the output end of the flat plate membrane tank is connected to the cleaning tank to circulate the cleaning solution.

[0009] As a further description of the above technical solution: a first vent valve is provided at the bottom of the first liquid tank, and the output end of the first liquid tank is connected in sequence to a first ball valve, a first pump body, a first flow meter and a first flow sensor through a pipeline, and the output end of the first flow sensor is connected to the cleaning tank.

[0010] As a further description of the above technical solution: a first liquid level gauge is provided on the inner side of the first liquid tank.

[0011] As a further description of the above technical solution: a second drain valve is provided at the bottom of the second liquid tank, and the output end of the second liquid tank is connected in sequence to a second ball valve, a second pump body, a second flow meter and a second flow sensor through a pipeline, and the output end of the second flow sensor is connected to the cleaning tank.

[0012] As a further description of the above technical solution: a second liquid level gauge is provided on the inner side of the second liquid tank.

[0013] As a further description of the above technical solution: a water inlet pipe is provided at the upper end of the cleaning tank, a third drain valve is provided at the lower part of the cleaning tank, and a heater and a third level gauge are provided on the inner side of the cleaning tank.

[0014] As a further description of the above technical solution: the output end of the cleaning tank is connected in sequence to a third ball valve, a filter screen, a pH-temperature integrated meter, a first conductivity sensor, a third pump body, a pressure gauge, and a pressure sensor via a pipeline.

[0015] As a further description of the above technical solution: one side of the pressure sensor is connected to the fourth ball valve at the input end of the flat membrane tank via a pipeline.

[0016] As a further description of the above technical solution: a second conductivity sensor and a balance are provided on the flat membrane tank, and the other side of the balance is connected to the cleaning tank.

[0017] As a further description of the above technical solution: the output end of the flat membrane tank is connected in sequence to a regulating valve, a third flow meter and a third flow sensor through a pipeline, and the third flow sensor is connected to the cleaning tank through a fifth ball valve.

[0018] The above technical solution has the following advantages or beneficial effects:

[0019] The system adjusts the cleaning agent concentration and calculates the membrane rejection rate using a conductivity sensor. Membrane flux is calculated in real time based on weight changes. Key parameters such as operating pressure, temperature, membrane flux, and membrane rejection rate are automatically recorded based on operating parameters. The system monitors changes in various parameters and automatically controls the cleaning agent concentration based on conductivity, achieving precise control of the membrane cleaning agent concentration and dosage. This improves the membrane cleaning speed and efficiency, simulates on-site CIP cleaning, and has a wide range of applications. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the flat membrane cleaning system proposed in this utility model.

[0021] Legend:

[0022] 1. Cleaning tank; 101. Inlet pipe; 102. Third drain valve; 103. Heater; 104. Third level gauge; 105. Third ball valve; 106. Filter screen; 107. pH-temperature integrated meter; 108. First conductivity sensor; 109. Third pump body; 110. Pressure gauge; 111. Pressure sensor; 2. First feed tank; 201. First drain valve; 202. First ball valve; 203. First pump body; 204. First flow meter; 205. 1. First flow sensor; 206. First level gauge; 3. Second feed tank; 301. Second drain valve; 302. Second ball valve; 303. Second pump body; 304. Second flow meter; 305. Second flow sensor; 306. Second level gauge; 4. Flat plate membrane tank; 401. Fourth ball valve; 402. Second conductivity sensor; 403. Balance; 404. Regulating valve; 405. Third flow meter; 406. Third flow sensor; 407. Fifth ball valve. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Reference Figure 1 The present invention provides an embodiment of a flat sheet membrane cleaning system, comprising: a cleaning tank 1; a first feed tank 2 and a second feed tank 3 connected in parallel to the cleaning tank 1; a flat sheet membrane tank 4 provided at the output end of the cleaning tank 1, the output end of the flat sheet membrane tank 4 being connected to the cleaning tank 1 to circulate the cleaning solution.

[0025] In this embodiment, the cleaning agent concentration is adjusted and the membrane rejection rate is calculated using a conductivity sensor. The membrane flux is calculated based on weight changes. Key parameters such as operating pressure, temperature, membrane flux, and membrane rejection rate can be automatically recorded based on operating parameters. Changes in various system parameters are monitored. The cleaning agent concentration is automatically controlled based on conductivity, achieving precise control of the membrane cleaning agent concentration and dosage, thereby improving the membrane cleaning speed and efficiency. This simulates on-site CIP cleaning and has a wide range of applications.

[0026] The bottom of the first liquid tank 2 is provided with a first vent valve 201. The output end of the first liquid tank 2 is connected in sequence to a first ball valve 202, a first pump body 203, a first flow meter 204 and a first flow sensor 205 through a pipeline. The output end of the first flow sensor 205 is connected to the cleaning tank 1. The inner side of the first liquid tank 2 is provided with a first level gauge 206.

[0027] In this embodiment, the capacity of the cleaning agent inside the first liquid tank 2 is monitored by the first liquid level gauge 206, and the output amount of the cleaning agent in the first liquid tank 2 is controlled. After the first ball valve 202 is opened, the first pump body 203 delivers the cleaning agent to the inside of the cleaning tank 1. The output amount of the cleaning agent inside the first liquid tank 2 is monitored and adjusted by the first flow meter 204 and the first flow sensor 205, and it is mixed with the water in the cleaning tank 1 to clean the membrane material.

[0028] The bottom of the second liquid tank 3 is provided with a second vent valve 301. The output end of the second liquid tank 3 is connected in sequence to a second ball valve 302, a second pump body 303, a second flow meter 304, and a second flow sensor 305 through a pipeline. The output end of the second flow sensor 305 is connected to the cleaning tank 1. The inner side of the second liquid tank 3 is provided with a second level gauge 306.

[0029] In this embodiment, the capacity of the cleaning agent inside the second liquid tank 3 is monitored by the second level gauge 306, and the output amount of the cleaning agent in the second liquid tank 3 is controlled. After the second ball valve 302 is opened, the second pump body 303 delivers the cleaning agent to the inside of the cleaning tank 1. The output amount of the cleaning agent inside the second liquid tank 3 is monitored and adjusted by the second flow meter 304 and the second flow sensor 305, and it is mixed with the water in the cleaning tank 1 to clean the membrane material.

[0030] Different types or concentrations of cleaning agents are placed inside the first liquid tank 2 and the second liquid tank 3. They can be replaced as needed during cleaning and measurement. A first drain valve 201 is installed below the first liquid tank 2, and a second drain valve 301 is installed at the bottom of the second liquid tank 3. The residual cleaning agent can be discharged and replaced with a different cleaning agent.

[0031] A water inlet pipe 101 is provided at the upper end of the cleaning tank 1, a third drain valve 102 is provided at the lower end of the cleaning tank 1, and a heater 103 and a third level gauge 104 are provided on the inner side of the cleaning tank 1.

[0032] In this embodiment, the water inlet pipe 101 is connected to an external device for water sampling. A heater 103 is provided inside the cleaning tank 1 to control the temperature of the liquid. The third level gauge 104 is used to monitor the total amount of water and cleaning agent after they have been mixed.

[0033] The output end of the cleaning tank 1 is connected in sequence via pipeline to a third ball valve 105, a filter screen 106, a pH-temperature integrated meter 107, a first conductivity sensor 108, a third pump body 109, a pressure gauge 110, and a pressure sensor 111.

[0034] In this embodiment, the third ball valve 105 outputs the mixed cleaning solution, the filter screen 106 filters out large particulate impurities in the water to prevent damage to the pump and other instruments, and the pH-temperature integrated meter 107 monitors the real-time temperature and pH of the liquid. The first conductivity sensor 108 is used to determine and calculate the membrane rejection rate and control the cleaning agent concentration, the third pump body 109 is used to adjust the test pressure, and the pressure gauge 110 and pressure sensor 111 are used to display the real-time pressure and monitor and feedback the real-time pressure to the PLV controller.

[0035] One side of the pressure sensor 111 is connected to the fourth ball valve 401 at the input end of the flat membrane tank 4 via a pipeline.

[0036] In this embodiment, the flat membrane tank 4 can be used to place various membrane materials for subsequent membrane experiments, and the output cleaning solution can be used for cleaning and testing.

[0037] The flat sheet membrane tank 4 is equipped with a second conductivity sensor 402 and a balance 403. The other side of the balance 403 is connected to the cleaning tank 1. The output end of the flat sheet membrane tank 4 is connected in sequence to a regulating valve 404, a third flow meter 405 and a third flow sensor 406 through pipelines. The third flow sensor 406 is connected to the cleaning tank 1 through a fifth ball valve 407.

[0038] In this embodiment, the second conductivity sensor 402 is used to measure the conductivity of the dialysis flow rate to calculate the rejection rate, the balance 403 is used to calculate the membrane flux, the regulating valve 404 is used to regulate the effluent flow rate, the third flow meter 405 and the third flow sensor 406 are used to record the pipeline flow rate, and the fifth ball valve 407 is used to control the pipeline switch to allow the cleaning solution to flow back to the cleaning tank 1 for recycling.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A flat sheet membrane cleaning system characterized by, Include: The cleaning bucket (1); The first liquid tank (2) and the second liquid tank (3) are connected in parallel on the cleaning bucket (1); The output end of the cleaning bucket (1) is provided with a flat plate membrane pool (4), and the output end of the flat plate membrane pool (4) is connected with the cleaning bucket (1), so that the cleaning liquid circulates; The bottom of the first liquid tank (2) is provided with a first emptying valve (201), and the output end of the first liquid tank (2) is sequentially connected with a first ball valve (202), a first pump body (203), a first flow meter (204) and a first flow sensor (205) through a pipeline, and the output end of the first flow sensor (205) is connected with the cleaning bucket (1); The inside of the first liquid tank (2) is provided with a first liquid level meter (206); The bottom of the second liquid tank (3) is provided with a second emptying valve (301), and the output end of the second liquid tank (3) is sequentially connected with a second ball valve (302), a second pump body (303), a second flow meter (304) and a second flow sensor (305) through a pipeline, and the output end of the second flow sensor (305) is connected with the cleaning bucket (1); The inside of the second liquid tank (3) is provided with a second liquid level meter (306); The upper end of the cleaning bucket (1) is provided with a water inlet pipe (101), the lower side of the cleaning bucket (1) is provided with a third emptying valve (102), and the inside of the cleaning bucket (1) is provided with a heater (103) and a third liquid level meter (104).

2. The flat sheet membrane cleaning system of claim 1, wherein: The output end of the cleaning bucket (1) is sequentially connected with a third ball valve (105), a filter screen (106), a PH-temperature integrated meter (107), a first conductivity sensor (108), a third pump body (109), a pressure gauge (110) and a pressure sensor (111) through a pipeline.

3. The flat sheet membrane cleaning system of claim 2, wherein: One side of the pressure sensor (111) is connected with a fourth ball valve (401) of the input end of the flat plate membrane pool (4) through a pipeline.

4. The flat sheet membrane cleaning system of claim 1, wherein: The flat plate membrane pool (4) is provided with a second conductivity sensor (402) and a balance (403), and the other side of the balance (403) is communicated with the cleaning bucket (1).

5. The flat sheet membrane cleaning system of claim 1, wherein: The output end of the flat plate membrane pool (4) is sequentially connected with an adjusting valve (404), a third flow meter (405) and a third flow sensor (406) through a pipeline, and the third flow sensor (406) is communicated with the cleaning bucket (1) through a fifth ball valve (407).

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