Device for testing permeability of hollow fiber membrane for laboratory

By designing a laboratory hollow fiber membrane permeability test device, using ball valves to control cross-flow or dead end filtration, combined with fully transparent PU pipelines and electronic equipment, the problem of poor detection of hollow fiber membrane permeability in the prior art was solved. This enables simple, fast and accurate testing, reducing costs and reducing the impact of concentration polarization.

CN222131518UInactive Publication Date: 2024-12-10SHANGHAI BITOO BIOTECHNOLOGY CO LTD
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Patent Information

Application Number
CN202420820444.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-19
Publication Date
2024-12-10
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The prior art cannot effectively test the permeability of hollow fiber membranes, especially when reducing the concentration polarization phenomenon during the filtration of raw material liquid, resulting in poor detection effect and complex testing methods and high cost.

Method used

A laboratory hollow fiber membrane permeability test device is designed, including feeding components, reflow components and removable detection components. The ball valve opens and closes the cross-flow or dead end filtration method can reduce the concentration polarization, and use the Fully transparent PU pipelines and electronic devices realize real-time online inspection, supporting testing of films of different sizes and internal and external pressure water flux testing.

Benefits of technology

It realizes simple and fast penetration performance testing of hollow fiber membranes, reduces testing costs, improves detection accuracy, can detect permeability online in real time, and supports testing of films of different sizes, reducing the impact of concentration polarization.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a device for testing the permeability of a hollow fiber membrane for a laboratory, which belongs to the technical field of hollow fiber membranes and is characterized in that a testing component is connected with a data recording component through a pipeline; the testing assembly comprises a material conveying assembly, a backflow assembly and a detachable detection assembly; the material conveying assembly is connected with the backflow assembly through a pipeline; the detachable detection assembly is connected with the material conveying assembly and the backflow assembly through pipelines; the material conveying assembly comprises a feeding liquid container, a diaphragm pump, a first ball valve and a first pressure gauge. According to the mode, the cross-flow filtering mode or the dead-end filtering mode is switched by controlling opening and closing of the multiple sets of ball valves, and when the dead-end filtering mode is selected to test the water flux, the third ball valve and the fourth ball valve can be closed; when a cross-flow filtration mode is adopted for testing, the third ball valve and the fourth ball valve can be opened to reduce concentration polarization in a raw material liquid filtration process.
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Description

Technical Field

[0001] The utility model relates to the technical field of hollow fiber membranes, in particular to a test device for the permeability performance of hollow fiber membranes used in laboratories. Background Art

[0002] Membrane materials can be widely used in the separation of substances, detection of substances, controlled release of substances, and control and enhancement of reactions. Membrane separation technology has the advantages of room temperature operation, simple operation, low energy consumption, high efficiency, small footprint, and easy scale-up. Therefore, membrane separation technology is widely used in laboratory research and actual sewage treatment. Among them, the more common ones are flat membranes and hollow fiber membranes. Flat membranes are easy to operate and manage, have a firm membrane structure, and are stable for a long time. However, compared with hollow fiber membranes, the one-time investment is higher and the membrane area per unit volume is smaller. Since the preparation process of hollow fiber membranes has high requirements for equipment and site, there are generally few homemade hollow fiber membranes in laboratories. However, with the advancement of technology, the proportion of hollow fiber membrane research in laboratories has gradually increased. However, the relevant test characterization of hollow fiber membrane monofilaments, especially the permeability performance, is very important, but the test method is not perfect. It is often necessary to outsource the test or complete the test by casting the components by yourself, which is very time-consuming and financially costly.

[0003] Application No. CN201020688432 discloses a flat membrane flux tester, which can test the water flux or retention rate of a single flat membrane.

[0004] However, the device cannot solve the concentration polarization phenomenon generated during the filtration of the raw material liquid, making it difficult to achieve the best detection effect.

[0005] Therefore, in order to overcome the existing testing shortcomings, it is necessary to provide a simple and convenient laboratory hollow fiber membrane testing device. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the prior art, the utility model provides a test device for the permeability performance of a hollow fiber membrane for laboratory use.

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A test device for the permeability of a hollow fiber membrane for laboratory use, comprising a test component, wherein the test component is connected to a data recording component through a pipeline;

[0009] The test assembly includes a feeding assembly, a reflux assembly and a detachable detection assembly;

[0010] The material delivery component is connected to the reflux component through a pipeline;

[0011] The detachable detection component is connected to the feeding component and the reflux component through a pipeline;

[0012] The feeding assembly includes a feed liquid container, a diaphragm pump, a first ball valve and a first pressure gauge. Various connecting pipes between the feed liquid containers are connected by plastic hoses to form a water circulation pipe. The first ball valve is located on the transmission pipe from the feed liquid container to the diaphragm pump. The diaphragm pump is connected to the detachable detection assembly through a pipe, and a first pressure gauge is fixedly connected between the diaphragm pump and the detachable detection assembly.

[0013] Furthermore, the reflux assembly includes a third ball valve, a second pressure gauge and a second ball valve, the second pressure gauge is connected to the detachable detection assembly through a pipeline, the second pressure gauge is located between the detachable detection assembly and the feed liquid container, and the second ball valve is located between the second pressure gauge and the feed liquid container.

[0014] Furthermore, the detachable detection assembly includes a main body, a first threaded quick connector and a second threaded quick connector, and both ends of the main body are fixedly connected with the first threaded quick connector and the second threaded quick connector.

[0015] Furthermore, the detachable detection component also includes a homemade hollow fiber membrane pool, a connecting joint, a first quick joint and a second quick joint. The two ends of the homemade hollow fiber membrane pool are respectively fixedly connected with connecting joints, the connecting joint and the main body are made of the same material, the opposite end of the connecting joint is engaged with the sealing gasket through a thread and is connected to the main body, and the first quick joint and the second quick joint are respectively inserted at both ends of the connecting joint.

[0016] Furthermore, the first pressure gauge is fixedly connected to the first quick connector via a pipeline, and the second pressure gauge is fixedly connected to the second quick connector via a pipeline.

[0017] Furthermore, the data recording component includes a discharge liquid container, an electronic balance and a computer. The discharge liquid container is fixedly connected to the homemade hollow fiber membrane pool through a pipeline. A fourth ball valve is fixedly connected between the discharge liquid container and the homemade hollow fiber membrane pool. The inner cavity of the electronic balance is connected to the discharge liquid container through a pipeline. The electronic balance and the computer are connected through a data cable.

[0018] Furthermore, the bottom of the feed liquid container is fixedly connected to a magnetic

[0019] Furthermore, all the water inlet and outlet pipes are PU pipes, and the pipes are completely transparent.

[0020] The utility model has the following technical effects:

[0021] 1. When the utility model is working, the opening and closing of several groups of ball valves are controlled to switch the cross-flow filtration or dead-end filtration mode. When the dead-end filtration mode is selected to test the water flux, the third ball valve and the fourth ball valve can be closed; when the cross-flow filtration mode is used for testing, the third ball valve and the fourth ball valve can be opened to reduce the concentration polarization during the filtration process of the raw material liquid.

[0022] 2. When the utility model is working, the test device is connected through a number of fully transparent PU tubes, so that the operator can easily observe the cleanliness and aging of the pipeline, and timely update the pipeline and improve the accuracy of the test results; at the same time, the connection method is simple and the operation is easy to quickly perform the permeability performance test of the central control fiber membrane.

[0023] 3. When the utility model is working, the permeability performance test of the central control fiber membranes of different sizes can be completed by replacing needles of different diameters; at the same time, the permeability of the hollow fiber membrane can be detected online in real time by connecting electronic equipment.

[0024] 4. When the utility model is working, the hollow fiber membrane can be divided into external pressure type (the stock liquid enters from the outer wall, flows out from the inner wall and is collected as the permeate) and internal pressure type (the stock liquid enters from the inner wall, flows out from the outer wall and is collected as the permeate) according to different application modes. The internal pressure type ( Figure 4 ) and external pressure water flux test ( Figure 5 ). BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 This is a flow chart of a test device for the permeability of a hollow fiber membrane for laboratory use in the utility model;

[0027] Figure 2 This is a block diagram of a test assembly of a test device for testing the permeability of a hollow fiber membrane for laboratory use according to the utility model;

[0028] Figure 3 This is a block diagram of a detachable detection component of a laboratory hollow fiber membrane permeability testing device of the utility model;

[0029] Figure 4 It is a block diagram of a laboratory hollow fiber membrane permeability testing device of the utility model;

[0030] Figure 5 This is a diagram of a first connection mode of a test device for the permeability of a hollow fiber membrane for laboratory use according to the utility model;

[0031] Figure 6 This is a diagram of a second connection mode of a test device for the permeability of a hollow fiber membrane for laboratory use according to the utility model;

[0032] Figure 7 The utility model is a perspective view of a self-made hollow fiber membrane pool of a test device for the permeability performance of a hollow fiber membrane for laboratory use.

[0033] The numbers in the figure represent:

[0034] 1. Diaphragm pump; 2. First pressure gauge; 3. Home-made hollow fiber membrane pool; 4. Second pressure gauge; 5. Discharge liquid container; 6. Electronic balance; 7. Computer; 8. Third ball valve; 9. First ball valve; 10. Second ball valve; 11. Feed liquid container; 12. Magnet; 13. Fourth ball valve; 20. Connecting joint; 21. First quick connector; 22. Second quick connector; 23. First threaded quick connector; 24. Second threaded quick connector; 25. Main body. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] The utility model is further described below in conjunction with embodiments.

[0037] Example 1

[0038] Please refer to the instruction manual Figure 1-7 , a test device for permeability of a hollow fiber membrane for laboratory use, comprising a test assembly, the test assembly being connected to a data recording assembly through a pipeline;

[0039] The test assembly includes a feeding assembly, a reflux assembly and a detachable detection assembly;

[0040] The material conveying component is connected to the return component through a pipeline;

[0041] The detachable detection component is connected with the material conveying component and the reflux component through a pipeline;

[0042] The feeding assembly includes a feed liquid container 11, a diaphragm pump 1, a first ball valve 9 and a first pressure gauge 2. Various connecting pipes between the feed liquid container 11 are connected by plastic hoses to form a water circulation pipe. The first ball valve 9 is located on the transmission pipe from the feed liquid container 11 to the diaphragm pump 1. The diaphragm pump 1 is connected to the detachable detection assembly through a pipe, and a first pressure gauge 2 is fixedly connected between the diaphragm pump 1 and the detachable detection assembly.

[0043] Controlling the opening and closing of the first ball valve 9 controls the opening and closing of the path for the liquid to flow from the feed liquid container 11 to the diaphragm pump 1. At the same time, the first pressure gauge 2 is connected on the path between the diaphragm pump 1 and the homemade hollow fiber membrane pool 3 to detect the pressure value therein for easy control.

[0044] The reflux assembly includes a third ball valve 8, a second pressure gauge 4 and a second ball valve 10. The second pressure gauge 4 is connected to the detachable detection assembly through a pipeline. The second pressure gauge 4 is located between the detachable detection assembly and the feed liquid container 11, and the second ball valve 10 is located between the second pressure gauge 4 and the feed liquid container 11.

[0045] Controlling the opening and closing of the third ball valve 8 controls the closing and opening of the path for the liquid to flow back to the feed liquid container 11 through the homemade hollow fiber membrane pool 3, and the second pressure gauge 4 is between the homemade hollow fiber membrane pool 3 and the feed liquid container 11 to detect the pressure value therein for easy control. The second ball valve 10 controls the opening and closing of the channel from the diaphragm pump 1 to the feed liquid container 11.

[0046] The detachable detection assembly comprises a main body 25, a first threaded quick connector 23 and a second threaded quick connector 24, and both ends of the main body 25 are fixedly connected with the first threaded quick connector 23 and the second threaded block connector 24 respectively.

[0047] The detachable detection component also includes a homemade hollow fiber membrane pool 3, a connecting joint 20, a first quick joint 21 and a second quick joint 22. The two ends of the homemade hollow fiber membrane pool 3 are respectively fixedly connected with the connecting joints 20. The connecting joints 20 and the main body 25 are made of the same material. The opposite end of the connecting joint 20 is engaged with the sealing gasket through a thread and is connected to the main body 25, and the first quick joint 21 and the second quick joint 22 are respectively inserted at both ends of the connecting joint 20.

[0048] The first pressure gauge 2 is fixedly connected to the first quick connector 21 through a pipeline, and the second pressure gauge 4 is fixedly connected to the second quick connector 22 through a pipeline.

[0049] The main body 25 is formed in one piece or in sections and then glued together. The two ends are respectively connected to a first threaded quick connector 23 and a second threaded quick connector 24 for connecting the inlet and outlet liquid pipelines. The material of the connecting connectors 20 at both ends of the homemade hollow fiber membrane pool 3 is the same as that of the main body 25. The main body 25 can be fully engaged and sealed with the main body 25 through threads and sealing pads. The two ends are respectively equipped with a first quick connector 21 and a second quick connector 22. This facilitates the replacement of needles of different diameters to complete the permeability performance test of hollow fiber membranes of different sizes.

[0050] The data recording component includes a discharge liquid container 5, an electronic balance 6 and a computer 7. The discharge liquid container 5 is fixedly connected to the homemade hollow fiber membrane pool 3 through a pipeline. A fourth ball valve 13 is fixedly connected between the discharge liquid container 5 and the homemade hollow fiber membrane pool 3. The inner cavity of the electronic balance 6 is connected to the discharge liquid container 5 through a pipeline. The electronic balance 6 and the computer 7 are connected through a data cable.

[0051] A magnet 12 is fixedly connected to the bottom of the feed liquid container 11 .

[0052] All water inlet and outlet pipes are PU pipes, and the pipes are completely transparent.

[0053] The inner cavity of the electronic balance 6 is connected to the discharge liquid container 5, which is used to receive pure water or raw material liquid and weigh and record the filtrate of the flat membrane. At the same time, the electronic balance 6 is connected to the computer 7 to transmit the measured weight value to the computer 7. The existing formula in the computer 7 and the input membrane area can be used to automatically process and display the permeation flux result, and the real-time change value of the flux can be obtained to improve the test efficiency of the hollow fiber membrane.

[0054] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A test device for the permeability of a hollow fiber membrane for laboratory use, comprising a test assembly, characterized in that: The test component is connected to the data recording component through a pipeline; The test assembly includes a feeding assembly, a reflux assembly and a detachable detection assembly; The material delivery component is connected to the reflux component through a pipeline; The detachable detection component is connected to the feeding component and the reflux component through a pipeline; The feeding assembly comprises a feed liquid container (11), a diaphragm pump (1), a first ball valve (9) and a first pressure gauge (2); various connecting pipes between the feed liquid containers (11) are connected by plastic hoses to form a water circulation pipe; the first ball valve (9) is located on the transmission pipe from the feed liquid container (11) to the diaphragm pump (1); the diaphragm pump (1) is connected to the detachable detection assembly via a pipe, and a first pressure gauge (2) is fixedly connected between the diaphragm pump (1) and the detachable detection assembly.

2. The test device for the permeability of hollow fiber membranes for laboratory use according to claim 1, characterized in that: The reflux component comprises a third ball valve (8), a second pressure gauge (4) and a second ball valve (10), wherein the second pressure gauge (4) is connected to the detachable detection component via a pipeline, the second pressure gauge (4) is located between the detachable detection component and the feed liquid container (11), and the second ball valve (10) is located between the second pressure gauge (4) and the feed liquid container (11).

3. The test device for the permeability of hollow fiber membranes for laboratory use according to claim 2, characterized in that: The detachable detection assembly comprises a main body (25), a first threaded quick connector (23) and a second threaded quick connector (24); the first threaded quick connector (23) and the second threaded quick connector (24) are respectively fixedly connected at both ends of the main body (25).

4. The test device for the permeability of hollow fiber membranes for laboratory use according to claim 3, characterized in that: The detachable detection component also includes a self-made hollow fiber membrane pool (3), a connecting joint (20), a first quick joint (21) and a second quick joint (22), wherein the two ends of the self-made hollow fiber membrane pool (3) are respectively fixedly connected with the connecting joint (20), the connecting joint (20) and the main body (25) are made of the same material, the opposite end of the connecting joint (20) is connected to the main body (25) by engaging with a sealing gasket through a thread, and the first quick joint (21) and the second quick joint (22) are respectively inserted at the two ends of the connecting joint (20).

5. The test device for the permeability of hollow fiber membranes for laboratory use according to claim 4, characterized in that: The first pressure gauge (2) is fixedly connected to the first quick connector (21) via a pipeline, and the second pressure gauge (4) is fixedly connected to the second quick connector (22) via a pipeline.

6. The test device for the permeability of hollow fiber membranes for laboratory use according to claim 5, characterized in that: The data recording component comprises a discharge liquid container (5), an electronic balance (6) and a computer (7); the discharge liquid container (5) is fixedly connected to the self-made hollow fiber membrane pool (3) via a pipeline; a fourth ball valve (13) is fixedly connected between the discharge liquid container (5) and the self-made hollow fiber membrane pool (3); the inner cavity of the electronic balance (6) is connected to the discharge liquid container (5) via a pipeline; and the electronic balance (6) and the computer (7) are connected via a data cable.

7. The test device for the permeability of hollow fiber membranes for laboratory use according to claim 6, characterized in that: A magnet (12) is fixedly connected to the bottom end of the feed liquid container (11).

8. The test device for the permeability of hollow fiber membranes for laboratory use according to claim 7, characterized in that: All the water inlet and outlet pipes are PU pipes, and the pipes are completely transparent.