Nanofiltration membrane performance testing device

Abstract

The utility model discloses a nanofiltration membrane performance testing device, which belongs to the technical field of nanofiltration membranes, and comprises a device main body, a liquid storage tank and a master control box, the device main body comprises a support seat, a plurality of testing through pipes, a liquid pipeline, a temperature controller, a gas pipeline and a pressurizing box; the test through pipe is arranged on the support seat, and the tubular nanofiltration membrane is mounted in the test through pipe for performance test; the liquid pipeline is used for liquid diversion; the temperature controller is arranged on the liquid pipeline and is used for regulating and controlling the liquid temperature during the performance test of the tubular nanofiltration membrane; the gas pipeline is connected with the pressurizing tank and the test through pipe; the pressurizing box is used for regulating and controlling the operation pressure during the performance test of the tubular nanofiltration membrane; the liquid storage tank is communicated with the test through pipe through a liquid pipeline; and the master control box is used for regulating and controlling the nanofiltration membrane performance testing process. The device disclosed by the utility model can meet the performance test requirements of nanofiltration membranes with different sizes or specifications, and the simultaneous test of a plurality of groups of nanofiltration membranes is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of nanofiltration membranes, and particularly relates to a nanofiltration membrane performance testing device. Background Art

[0002] Nanofiltration membrane is a functional semipermeable membrane widely used in liquid separation and purification technologies. It can effectively separate small molecules from large molecules and has high selectivity. Nanofiltration membrane is between reverse osmosis membrane and ultrafiltration membrane. It is mainly used to remove pollutants such as dissolved salts, organic matter, heavy metal ions and microorganisms in water. It is commonly used in water treatment, food processing and medicine. The working principle of nanofiltration membrane is based on size exclusion and charge repulsion (the charge on the membrane surface or in the pores can affect the ability of solutes to pass through) to achieve selective filtration or separation of specific substances. Compared with other membrane separation technologies, nanofiltration membrane has relatively low energy consumption and operating pressure, and is suitable for processing complex liquids containing multiple components.

[0003] In industrial production, sheet nanofiltration membranes are often made into roll membranes for use. The filtration performance and separation performance of nanofiltration membranes are closely related to water treatment and reuse processes. In order to ensure their effectiveness and reliability in practical applications, their performance must be systematically tested and evaluated.

[0004] Researchers have developed some nanofiltration membrane performance testing devices. For example, Chinese patent publication CN211602833U discloses a nanofiltration membrane performance testing device that includes a control system, a first storage tank, a pressure pump, a nanofiltration tank, a pressure sensor, a second storage tank, an electronic scale, and a first temperature sensor. This testing device can simulate the performance of the nanofiltration membrane under preset pressure and temperature conditions. Chinese patent publication CN205340593U discloses a single nanofiltration membrane performance testing device that includes a liquid storage tank to be separated, a pressurizing device, a first-stage nanofiltration membrane device, a second-stage nanofiltration membrane device, and a third-stage nanofiltration membrane device. The first-stage nanofiltration membrane device includes four nanofiltration membrane tubes, the second-stage nanofiltration membrane device includes two nanofiltration membrane tubes, and the third-stage nanofiltration membrane device includes one nanofiltration membrane tube. Each of the seven nanofiltration membrane tubes includes a tube body, a nanofiltration membrane, and an inlet end cap and an outlet end cap. This utility model relies on existing membrane separation devices to complete the performance test of a single nanofiltration membrane.

[0005] In order to meet the performance testing requirements of nanofiltration membranes of different sizes or specifications, realize the integrated design of the device and test multiple groups of nanofiltration membranes simultaneously, it is necessary to develop a new type of nanofiltration membrane performance testing device. Utility Model Content

[0006] In order to solve the deficiencies in the prior art, the utility model provides a nanofiltration membrane performance testing device.

[0007] The specific technical solutions adopted are as follows:

[0008] A nanofiltration membrane performance testing device, comprising:

[0009] The device body 1 includes a support base, multiple test tubes 7, a liquid pipeline, a temperature controller 5, a gas pipeline and a pressurizing box 11; the test tube 7 is set on the support base, and the tubular nanofiltration membrane 8 is installed in the test tube 7 for performance testing; the liquid pipeline is used for liquid diversion; the temperature controller 5 is set on the liquid pipeline for regulating the liquid temperature during the performance test of the tubular nanofiltration membrane 8; the gas pipeline connects the pressurizing box 11 and the test tube 7; the pressurizing box 11 is used to regulate the operating pressure during the performance test of the tubular nanofiltration membrane 8;

[0010] It also includes a liquid storage tank 2 and a main control box 23. The liquid storage tank 2 and the test pipe 7 are connected through a liquid pipeline. The test liquid enters the test pipe 7 through the liquid pipeline for performance testing of the tubular nanofiltration membrane 8. After the test, the liquid flows back to the liquid storage tank 2 through the liquid pipeline. The liquid pipeline is provided with a post-test liquid collection point. The main control box 23 is used to regulate the nanofiltration membrane performance test process.

[0011] Furthermore, a water pump 3 is provided in the liquid storage tank 2 for delivering the test liquid; a T-shaped transmission pipe 4 is installed on the liquid storage tank 2, and a temperature controller 5 is installed on the transmission pipe 4.

[0012] Furthermore, the transmission pipe 4 is connected to the first connecting pipe 6, and a plurality of test pipes 7 are installed on the side of the first connecting pipe 6. The first connecting pipe 6 is connected to one end of the test pipe 7, and the other end of the test pipe 7 is connected to one end of the second connecting pipe 9. The other end of the second connecting pipe 9 is connected to the reflux pipe 10, and the reflux pipe 10 returns the liquid after the test to the liquid storage tank 2.

[0013] Specifically, the number of the test pipes 7 is ≥2, further 3, and interconnecting pipes 17 are installed between the test pipes 7 .

[0014] Specifically, a tube cover 24 is installed at the end of the reflux tube 10 , and the post-test liquid can be collected by opening the tube cover 24 .

[0015] Preferably, a thermometer 15 is installed on the side of the temperature controller 5.

[0016] Furthermore, a booster pump 12 is provided in the pressurizing box 11 . The booster pump 12 is connected to one end of a third connecting pipe 13 , and the other end of the third connecting pipe 13 is installed on a side of the test pipe 7 .

[0017] Preferably, a pressure gauge 14 is installed on the side of the third connecting pipe 13, and the booster pump 12 and the pressure gauge 14 are compatible.

[0018] The opening and closing of each test pipe 7 is controlled individually by the valve 16 on the liquid pipeline, and the flow rate of the test liquid is regulated.

[0019] The bracket seat is provided with multiple fixing plates 18, and a limiting groove 19 is opened in the fixing plate 18. A mounting sleeve 20 is installed on the side of the test tube 7. One end of the mounting sleeve 20 is provided with a limiting block 21 adapted to the limiting groove 19, and the other end of the mounting sleeve 20 is installed with a fixing bolt 22.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] (1) The utility model adopts a structural design. When the solution to be tested (test liquid) is transferred to the transmission pipe by a water pump, it enters the first connecting pipe through the transmission pipe and is then transferred to the test pipe to test the nanofiltration membrane. The transferred liquid is pressurized by starting the third connecting pipe, and the temperature controller is started to adjust the temperature of the test liquid. The performance of the tubular nanofiltration membrane is tested by simulating the preset temperature and pressure. Through automated data observation, users can better test the nanofiltration membrane that meets the requirements.

[0022] (2) The present invention provides a mounting sleeve and a limit block, etc. When it is necessary to test nanofiltration membranes of different sizes or specifications, the clamping of the test tube can be canceled by rotating the fixing bolt, and one or more test tubes can be removed. According to the radius of the test tube to be installed, the limit block is slid in the limit groove, and the two mounting sleeves are driven to move closer to each other by rotating the fixing bolt to clamp and fix the side of the test tube. The present invention device can test multiple groups of nanofiltration membranes at the same time. By adjusting the valve to open or close the flow of liquid in each test tube, it is convenient for users to better test a certain test tube, thereby improving the applicability of the device body. The flow rate of the test liquid can be regulated by adjusting the valve, which is convenient for testing the use effect of the nanofiltration membrane under different parameters and comprehensively evaluating its performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of the nanofiltration membrane performance testing device in the first direction of the present invention;

[0024] Figure 2 This is a schematic diagram of the three-dimensional structure of the nanofiltration membrane performance testing device in the second direction of the present invention;

[0025] Figure 3 This is a schematic diagram of a (partial) cross-sectional structure of a nanofiltration membrane performance testing device in the present invention;

[0026] Figure 4 This is a schematic diagram of the internal structure of the device body and the liquid storage tank in the nanofiltration membrane performance testing device of the present invention;

[0027] Figure 5 for Figure 3 Enlarged view of point A in the middle.

[0028] Figure markings: 1. Device body; 2. Liquid storage tank; 3. Water pump; 4. Transmission pipe; 5. Temperature controller; 6. First connecting pipe; 7. Test pipe; 8. Tubular nanofiltration membrane; 9. Second connecting pipe; 10. Reflux pipe; 11. Pressurization tank; 12. Booster pump; 13. Third connecting pipe; 14. Pressure gauge; 15. Thermometer; 16. Valve; 17. Intercommunication pipe; 18. Fixing plate; 19. Limiting groove; 20. Mounting sleeve; 21. Limiting block; 22. Fixing bolt; 23. Main control box; 24. Pipe cover. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Example 1

[0031] like Figure 1-Figure 5 As shown, the nanofiltration membrane performance testing device provided by the present invention includes a device body 1, a liquid storage tank 2 and a main control box 23; the device body 1 includes a bracket seat, multiple test tubes 7, a liquid pipeline, a temperature controller 5, a gas pipeline and a pressurizing box 11; the test tube 7 is arranged on the bracket seat, and the tubular nanofiltration membrane 8 is installed in the test tube 7 for performance testing; the liquid pipeline is used for liquid diversion; the temperature controller 5 is arranged on the liquid pipeline, and is used to regulate the liquid temperature during the performance test of the tubular nanofiltration membrane 8; the gas pipeline connects the pressurizing box 11 and the test tube 7; the pressurizing box 11 is used to regulate the operating pressure during the performance test of the tubular nanofiltration membrane 8; the liquid storage tank 2 and the test tube 7 are connected through the liquid pipeline, and the test liquid enters the test tube 7 through the liquid pipeline for performance testing of the tubular nanofiltration membrane 8. After the test, the liquid flows back to the liquid storage tank 2 through the liquid pipeline, and the liquid pipeline is provided with a post-test liquid collection point; the main control box 23 is used to regulate the nanofiltration membrane performance testing process.

[0032] Specifically, a liquid storage tank 2 is installed at one end of the device body 1, and a water pump 3 is provided in the liquid storage tank 2 for transporting the test liquid; a T-shaped transmission tube 4 is installed on the liquid storage tank 2, and the transmission tube 4 is adapted to the water pump 3. A temperature controller 5 is installed on the side of the transmission tube 4, and the transmission tube 4 is connected to the first connecting tube 6. Three test tubes 7 are installed on the side of the first connecting tube 6, and an interconnecting tube 17 is installed between the test tubes 7. The first connecting tube 6 is connected to one end of the test tube 7, and the other end of the test tube 7 is connected to one end of the second connecting tube 9. The other end of the second connecting tube 9 is connected to the reflux pipe 10. The reflux pipe 10 returns the tested liquid to the liquid storage tank 2, and the reflux pipe 10 is adapted to the liquid storage tank 2; a pipe cover 24 is provided at the end of the reflux pipe 10, and the post-test liquid can be collected by opening the pipe cover 24.

[0033] A pressurizing tank 11 is also installed in the device body 1, and a booster pump 12 is installed in the pressurizing tank 11. The booster pump 12 is connected to one end of a third connecting pipe 13, and the other end of the third connecting pipe 13 is installed on the side of the test pipe 7. A pressure gauge 14 is installed on the side of the third connecting pipe 13, and the booster pump 12 and the pressure gauge 14 are compatible.

[0034] A thermometer 15 is mounted on the side of the temperature controller 5 .

[0035] A valve 16 is installed on the side of the test tube 7 to control the opening and closing of each test tube 7 and regulate the flow rate of the test liquid.

[0036] When it is necessary to test the nanofiltration membrane, the temperature and pressure during the test are adjusted by adjusting the temperature controller 5 and the booster pump 12. Different usage scenarios are accurately adjusted and simulated through preset operations. The solution to be tested is added to the liquid storage tank 2, and the water pump 3 mobilizes the solution to be tested and transmits it to the transmission pipe 4. The temperature of the solution is adjusted by the temperature controller 5. After it is transmitted to the first connecting pipe 6, the valve 16 is adjusted according to the number of nanofiltration membranes to be tested, so that the test liquid enters the test pipe 7. The pressure is adjusted by the booster pump 12 so that the solution passes through the tubular nanofiltration membrane 8 for testing. The solution flowing out after the test is transmitted to the reflux pipe 10 through the second connecting pipe 9. The solution can be collected by opening the pipe cover 24, or the solution can be returned to the liquid storage tank 2 for the next test. The test data is observed and recorded through the main control box 23, and the performance parameters of various nanofiltration membranes are summarized and compared with the expected data to improve the accuracy of the test.

[0037] like Figure 3 and Figure 5As shown, one end of the device body 1 is equipped with multiple fixing plates 18, and two limiting grooves 19 are provided in the fixing plate 18. A mounting sleeve 20 is installed on the side of the test tube 7, and one end of the mounting sleeve 20 is equipped with a limiting block 21 adapted to the limiting groove 19. One end of the mounting sleeve 20 is equipped with two fixing bolts 22. When it is necessary to test nanofiltration membranes of different sizes or specifications, the clamping of the test tube 7 can be canceled by rotating the fixing bolts 22, and one or more test tubes 7 can be removed. According to the radius of the test tube to be installed, the limiting block 21 is slid in the limiting groove 19, and the two mounting sleeves 20 are driven to move closer to each other by rotating the fixing bolts 22 to clamp and fix the side of the test tube 7. At the same time, multiple groups of nanofiltration membranes are tested, and the flow of liquid in each test tube 7 is opened or closed by adjusting the valve 16, so that the user can better test one or more test tubes 7. The remaining features are the same as those in Example 1.

[0038] The working principle of the nanofiltration membrane performance testing device of the present invention is as follows: when the nanofiltration membrane needs to be tested, the temperature and pressure during the test are adjusted by adjusting the temperature controller 5 and the booster pump 12, and different usage scenarios are accurately adjusted through preset operations to simulate different usage scenarios. The solution to be tested is added to the liquid storage tank 2, and the water pump 3 mobilizes the solution to be tested and transmits it to the transmission pipe 4. The temperature of the solution is adjusted by the temperature controller 5. After it is transmitted to the first connecting pipe 6, the valve 16 is adjusted according to the number of nanofiltration membranes to be tested, so that the solution enters the test pipe 7. After the pressure is adjusted by the booster pump 12, the solution passes through the tubular nanofiltration membrane 8 for testing. The tested solution is transmitted to the reflux pipe 10 through the second connecting pipe 9, and the solution can be collected by opening the pipe cover 24. Or the solution returns to the liquid storage tank 2 for the next test. When it is necessary to test nanofiltration membranes of different sizes or specifications, the clamping of the test tube 7 can be canceled by rotating the fixing bolt 22, and one or more test tubes 7 can be removed. According to the radius of the test tube to be installed, the limit block 21 is slid in the limit groove 19, and the two mounting sleeves 20 are driven to move closer to each other by rotating the fixing bolt 22 to clamp and fix the side of the test tube 7. At the same time, multiple groups of nanofiltration membranes are tested, and the flow of liquid in each test tube 7 is opened or closed by adjusting the valve 16, so that the user can better test one or more test tubes 7. The test data is observed and recorded through the main control box 23, and the performance parameters of various nanofiltration membranes are summarized and compared with the expected data to improve the accuracy of the test.

[0039] The embodiments described above provide a detailed description of the technical solutions of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, supplements or similar substitutions made within the scope of the principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A nanofiltration membrane performance testing device, characterized in that: include: The device body (1) comprises a support seat, a plurality of test tubes (7), a liquid pipeline, a temperature controller (5), a gas pipeline and a pressurizing box (11); the test tube (7) is arranged on the support seat, and the tubular nanofiltration membrane (8) is installed in the test tube (7) for performance testing; the liquid pipeline is used for liquid diversion; the temperature controller (5) is arranged on the liquid pipeline and is used to control the liquid temperature during the performance test of the tubular nanofiltration membrane (8); The gas pipeline connects the pressurizing box (11) and the test tube (7); the pressurizing box (11) is used to regulate the operating pressure during the performance test of the tubular nanofiltration membrane (8); The invention also includes a liquid storage tank (2) and a main control box (23); the liquid storage tank (2) and the test tube (7) are connected via a liquid pipeline, the test liquid enters the test tube (7) via the liquid pipeline, and the liquid after the test flows back to the liquid storage tank (2) via the liquid pipeline, and the liquid pipeline is provided with a post-test liquid collection point; the main control box (23) is used to control the nanofiltration membrane performance test process.

2. The nanofiltration membrane performance testing device according to claim 1, characterized in that: A water pump (3) is provided in the liquid storage tank (2) for conveying the test liquid; a transmission pipe (4) is installed on the liquid storage tank (2), and a temperature controller (5) is installed on the transmission pipe (4).

3. The nanofiltration membrane performance testing device according to claim 1, characterized in that: The transmission pipe (4) is connected to the first connecting pipe (6), and a plurality of test pipes (7) are installed on the side of the first connecting pipe (6). The first connecting pipe (6) is connected to one end of the test pipe (7), and the other end of the test pipe (7) is connected to one end of the second connecting pipe (9). The other end of the second connecting pipe (9) is connected to the return pipe (10), and the return pipe (10) returns the tested liquid to the liquid storage tank (2).

4. The nanofiltration membrane performance testing device according to claim 1, characterized in that: The number of the test pipes (7) is ≥2, and interconnecting pipes (17) are installed between the test pipes (7).

5. The nanofiltration membrane performance testing device according to claim 1, characterized in that: The end of the reflux pipe (10) is provided with a pipe cover (24), and the post-test liquid can be collected by opening the pipe cover (24).

6. The nanofiltration membrane performance testing device according to claim 1, characterized in that: A thermometer (15) is installed on the side of the temperature controller (5).

7. The nanofiltration membrane performance testing device according to claim 1, characterized in that: A booster pump (12) is provided in the pressurizing box (11), the booster pump (12) is connected to one end of a third connecting pipe (13), and the other end of the third connecting pipe (13) is installed on the side of the test pipe (7).

8. The nanofiltration membrane performance testing device according to claim 7, characterized in that: A pressure gauge (14) is installed on the side of the third connecting pipe (13), and the booster pump (12) and the pressure gauge (14) are adapted to each other.

9. The nanofiltration membrane performance testing device according to claim 1, characterized in that: The opening and closing of each test pipe (7) is controlled individually by a valve (16) on the liquid pipeline, and the flow rate of the test liquid is regulated.

10. The nanofiltration membrane performance testing device according to claim 1, characterized in that: The bracket seat is provided with a plurality of fixing plates (18), a limiting groove (19) is provided in the fixing plate (18), a mounting sleeve (20) is installed on the side of the test tube (7), one end of the mounting sleeve (20) is provided with a limiting block (21) adapted to the limiting groove (19), and the other end of the mounting sleeve (20) is installed with a fixing bolt (22).

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