High-stability filtering membrane bag

Abstract

The utility model discloses a high stability filter membrane package, including the filter main part, the filter main part includes the screen mesh and the filter membrane that are staggered and stacked arrangement, the filter main part is provided with the corresponding circulation hole and the sealing hole on the screen mesh, the screen mesh includes the screen mesh body and the sealing part on the screen mesh body, the sealing part is provided with the sealing hole, and the sealing part is provided with the circulation hole and the sealing hole. The sealing hole is formed in the sealing part in a penetrating mode, the circulation hole is communicated with a flow channel of the screen, and the portion, on the inner edge side of the sealing part, of the screen is provided with a flow blocking area. The utility model aims to reduce the impact on the inner side edge of the sealing part, prevent the sealing part from being separated from the screen, and ensure the stability and reliability of the filtering process.

Description

Technical Field

[0001] The utility model belongs to the technical field of filter filtration, and particularly relates to a high-stability filter membrane package. Background Art

[0002] A filter membrane package is a common tangential flow filtration device. The filter membrane package in the prior art is formed by stacking a sieve mesh and a filter membrane inside. Adjacent filter membranes are arranged oppositely, so that the liquid inlet surface or the liquid outlet surface of the filter membrane is arranged oppositely. An inlet liquid sieve mesh is arranged between adjacent liquid inlet surfaces to form an inlet liquid flow channel, and an outlet liquid sieve mesh is arranged between adjacent liquid outlet surfaces to form an outlet liquid flow channel. Materials enter the inlet liquid flow channel through the inlet of the filter membrane package, pass through the filtration of the filter membrane, enter the outlet liquid flow channel, and are discharged from the filter membrane package along the outlet of the filter membrane package. Inlet liquid ports, return ports and outlet ports are arranged on both the inlet liquid sieve mesh and the outlet liquid sieve mesh. Among them, the inlet liquid flow channel needs to be communicated with the inlet liquid port and the return port, and the outlet liquid flow channel is communicated with the outlet port. In order to prevent the mixing of the inlet liquid and the filtrate, usually the outlet port on the inlet liquid sieve mesh needs to be sealed, and the inlet liquid port and the return port on the outlet liquid sieve mesh are sealed. The sealing is realized by arranging a sealing part on the sieve mesh. The thickness of the sealing part is usually greater than that of the sieve mesh. A larger flow channel between the filter membrane and the sieve mesh can be ensured through the sealing part with a larger thickness, but the sealing effect of the sealing part will be affected. When impacted by a large-flow liquid, there is a risk that the sealing part will be separated from the sieve mesh, affecting the use stability of the filter membrane package. Summary of the Utility Model

[0003] The utility model provides a high-stability filter membrane package, which reduces the impact on the inner edge of the sealing part, prevents the sealing part from being separated from the sieve mesh, and ensures the stable and reliable filtration process.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A high-stability filter membrane package includes a filtration main body. The filtration main body includes a sieve mesh and a filter membrane that are arranged alternately and stacked. The filtration main body is provided with corresponding through holes and sealing holes on the sieve mesh. The sieve mesh includes a sieve mesh body and a sealing part arranged on the sieve mesh body. The sealing hole is arranged through the sealing part. The through hole is communicated with the flow channel of the sieve mesh. The sieve mesh is provided with a flow blocking area on the inner edge side of the sealing part. By arranging the liquid-impermeable flow blocking area on the sieve mesh, a buffer is formed at the inner edge of the sealing part, ensuring that the liquid flow will not directly impact the edge of the sealing part and reducing the risk of the sealing part being separated from the sieve mesh.

[0006] Preferably, the thickness of the flow-blocking area is less than that of the sealing part. When the height of the flow-blocking area is greater than the thickness of the sealing part, it will affect the sealing effect of the sealing part on the adjacent filter membrane. When the thickness of the flow-blocking area is lower than that of the sealing part, it is convenient for the flow-blocking area to form a certain slope, reducing the dead volume remaining inside the inner circumference of the sealing part, which is beneficial to improving the recovery rate of the feed liquid. At the same time, it also reduces the pressure loss of the feed liquid when flowing to the position of the sealing part and improves the filtration flux.

[0007] Preferably, the thickness of the flow-blocking area gradually decreases from the sealing part to the thickness of the screen mesh.

[0008] Preferably, the flow-blocking area is formed by welding a seal or curing an adhesive on the screen mesh, or the flow-blocking area is formed by hot-pressing the screen mesh body. By hot-pressing the screen mesh body, deforming the screen mesh body to form a liquid-impermeable flow-blocking area can simplify the process and improve production efficiency.

[0009] Preferably, the sealing part includes seals respectively arranged on both sides of the screen mesh body, and the screen mesh body and the seals are connected as a whole. The seals can be formed by welding with the screen mesh body, or the production and fusion processes of the two seals can be completed by one injection molding, without the need for multiple cuttings of the seals and subsequent multiple welding processes, effectively improving production efficiency, reducing production processes, and thus improving the product qualification rate.

[0010] Preferably, the seals are arranged at two opposite ends of the screen mesh body.

[0011] Preferably, the seals are arranged along the outer circumference of the screen mesh body.

[0012] Preferably, the width of the flow-blocking area is 0.3 - 2 mm. A flow-blocking area with a suitable width is beneficial to ensuring the buffer space for the feed liquid and the filtration area of the screen mesh.

[0013] Preferably, the thickness of the screen mesh is 0.3 - 3 mm, the diameter of the mesh holes of the screen mesh is 0.1 - 0.5 mm, the opening rate of the screen mesh is 24 - 36%, and the angle between the straight wires of the screen mesh and the long side of the screen mesh is 70° - 100°. The screen mesh is woven from bent wires and straight wires with different curling rates, and the curling rate of the bent wires is greater than that of the straight wires. When the feed liquid flows inside the filtration unit, through the above structural design of the screen mesh, the feed liquid can form a turbulent flow along the flow channel of the screen mesh, and the impurities in the feed liquid will not be blocked at a certain specific position, greatly improving the filtration efficiency.

[0014] The beneficial effects of the present utility model are as follows: (1) The flow-blocking area forms a buffer at the inner edge of the sealing part, which can effectively prevent the separation of the sealing part from the screen mesh and improve the stability and reliability of the filtration process; (2) The setting of the flow-blocking area can improve the connection strength of the edge of the sealing part, prevent the leakage of the liquid material at the sealing part, and enhance the sealing performance; (3) Reduce the forming difficulty of the sealing part, improve the production efficiency and the qualified rate of the finished products of the filtration membrane package. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present utility model;

[0016] Figure 2 is an exploded sectional structural view of the filtration main body of the present utility model;

[0017] Figure 3 is a schematic structural diagram of the liquid outlet screen mesh of the present utility model;

[0018] Figure 4 is a schematic structural diagram of the liquid inlet screen mesh of the present utility model;

[0019] Figure 5 is a sectional view of the screen mesh structure of Embodiment 1 of the present utility model;

[0020] Figure 6 is a sectional view of the screen mesh structure of Embodiment 2 of the present utility model;

[0021] Figure 7 is a sectional view of the screen mesh structure of Embodiment 3 of the present utility model;

[0022] In the figure: filtration main body 1, liquid outlet 2, liquid inlet 3, return port 4, rubber-coated part 5, screen mesh body 10a, flow-blocking area 10b, liquid outlet screen mesh 11, liquid inlet screen mesh 12, filtration membrane 13, sealing part 14, sealing member 14a. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] As Figure 1 and Figure 2 shown in the embodiments, a highly stable filtration membrane package includes a filtration main body 1, and a rubber-coated part 5 is coated on the outside of the filtration main body 1 to form a complete filtration membrane package. The filtration main body 1 includes a screen mesh and a filtration membrane 13 arranged in an alternating and stacked manner. In this embodiment, the screen mesh is divided into a liquid inlet screen mesh 12 and a liquid outlet screen mesh 11, and the filtration membrane 13 is arranged between the liquid inlet screen mesh 12 and the liquid outlet screen mesh 11. The filtration main body 1 is provided with corresponding flow holes and sealing holes on the screen mesh. The screen mesh includes a screen mesh body 10a and a sealing part 14 arranged on the screen mesh body 10a. The sealing holes penetrate through the sealing part 14, and the flow holes are communicated with the flow channels of the screen mesh. For the liquid outlet screen mesh 11, asFigure 3 As shown, the liquid inlet 3 and the reflux port of the liquid outlet screen 11 are sealed holes, and the liquid outlet 2 is a through hole; for the liquid inlet screen 12, as Figure 4 shown, the liquid outlet 2 is a sealed hole, and the liquid inlet 3 and the reflux port are through holes.

[0025] As Figure 3 and Figure 4 shown, the screen is cut by a knife die of a certain shape. The seal 14a is arranged at two opposite ends of the screen body 10a. The flow blocking area 10b is formed by welding the seal 14a or curing the adhesive on the screen. The screen body 10a and the seal 14a are connected as a whole. Taking the liquid inlet screen 12 as an example, the liquid inlet 3 and the reflux port of the liquid inlet screen 12 are through ports, and the liquid outlet 2 is a sealed hole. After the cut liquid inlet screen 12 is positioned and fixed at a specific position of a mold, the molten plastic is injected into the set cavities on both sides of the liquid inlet screen 12 under high pressure through the injection port. Then, after a period of pressure holding and cooling process, the molten plastic cools and solidifies into the seal 14a, which is completely fused with the liquid inlet screen 12 to form a liquid inlet unit. The liquid inlet unit produced in this form has high production efficiency. The production and fusion process of two seals 14a are completed in one injection molding, without the need for multiple cuts of the seal 14a and subsequent multiple welding processes. The production process is less, so the qualified rate will also be greatly improved. At the same time, the liquid inlet unit in this form has better sealing performance. Under the action of high temperature and high pressure, the material of the seal 14a can better fuse into the screen, avoiding the liquid material from passing through the cross section of the screen. Compared with the way of welding the seal part 14 on the screen, the risk of leakage is reduced. The seal 14a is made of one of PE, silica gel, epoxy resin, PA, rubber, PMMA and PP, and can be selected according to actual filtration requirements to meet the chemical compatibility of the liquid material.

[0026] As Figure 3 shown, in the liquid outlet screen 11 of this embodiment, the seal 14a is arranged at two opposite ends of the screen body 10a. As Figure 4 shown, in the liquid inlet screen 12 of this embodiment, the seal 14a is arranged along the outer periphery of the screen body 10a. The flow blocking area 10b is provided on the inner edge side of the seal part 14 of the screen, and the thickness of the flow blocking area 10b is less than the thickness of the seal part 14. The width of the flow blocking area 10b is 0.3 - 2 mm to reduce the dead volume at the edge of the seal 14a and meet the stability requirements at the same time.

[0027] The thickness of the screen is 0.3 - 3 mm, the diameter of the mesh holes of the screen is 0.1 - 0.5 mm, the aperture ratio of the screen is 24 - 36%, and the angle between the straight wire of the screen and the long side of the screen is 70° - 100°. The screen does not affect the flow of the material and does not directly participate in the filtration of the material, avoiding affecting the stability of filtration due to the presence of the screen. The structure of the screen enables the liquid to flow along the flow channel inside the screen to form a turbulent flow, so that the impurities in the liquid do not get blocked at a specific position, improving the filtration efficiency.

[0028] Example 2

[0029] The difference between Example 2 and Example 1 is that, as Figure 6 shown, when the sealing part 14 is formed, the thickness of the flow blocking area 10b gradually decreases from the sealing part 14 to the thickness of the screen, forming a flow blocking area 10b with a certain slope, thereby further reducing the dead volume inside the inner circumference of the seal 14a and also further reducing the pressure loss of the liquid when flowing to the position of the seal 14a, improving the filtration flux.

[0030] Example 3

[0031] The difference between Example 3 and Example 1 is that, as Figure 7 shown, the flow blocking area 10b is formed by hot pressing the screen body 10a. The hot pressing of the screen body 10a deforms the screen to obtain an impermeable flow blocking area 10b, thereby further improving the buffering performance of the inner edge of the sealing part 14, being applicable to the filtration of liquid with a larger flow rate, reducing the impact of the liquid on the edge of the sealing part 14, and further improving the filtration stability of the filter membrane package.

[0032] The above has introduced the embodiments of the present invention in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A high-stability filter membrane package, comprising a filter main body (1), the filter main body (1) including a sieve mesh and a filter membrane (13) arranged in an alternating stacked manner, the filter main body (1) being provided with corresponding flow holes and sealing holes on the sieve mesh, characterized in that, The screen includes a screen body (10a) and a sealing portion (14) provided on the screen body (10a). The sealing holes are provided through the sealing portion (14). The circulation holes communicate with the flow channels of the screen. The screen is provided with a flow blocking area (10b) on the inner edge side of the sealing portion (14).

2. The high-stability filter membrane package according to claim 1, characterized in that, The thickness of the flow blocking area (10b) is less than the thickness of the sealing portion (14).

3. The high-stability filter membrane package according to claim 2, characterized in that, The thickness of the flow blocking area (10b) gradually decreases from the sealing portion (14) to the thickness of the screen.

4. The high-stability filter membrane package according to claim 2, characterized in that, The thickness of the flow blocking area (10b) is less than the thickness of the screen body (10a).

5. A highly stable filter membrane package according to claim 1, characterized in that, The flow blocking area (10b) is formed by welding a seal (14a) or curing an adhesive on the screen. Alternatively, the flow blocking area (10b) is formed by hot pressing the screen body (10a).

6. A highly stable filter membrane package according to claim 1, characterized in that, The sealing portion (14) includes seals (14a) provided on both sides of the screen body (10a). The screen body (10a) and the seals (14a) are connected as a whole.

7. The high-stability filter membrane package according to claim 6, characterized in that, The seals (14a) are provided at two opposite ends of the screen body (10a).

8. The high-stability filter membrane package according to claim 6, characterized in that, The seals (14a) are arranged along the outer periphery of the screen body (10a).

9. A highly stable filter membrane package according to any one of claims 1-8, characterized in that, The width of the flow blocking area (10b) is 0.3 - 2 mm.

10. A highly stable filter membrane package according to any one of claims 1-8, characterized in that, The thickness of the screen is 0.3 - 3 mm, the diameter of the mesh holes of the screen is 0.1 - 0.5 mm, the opening ratio of the screen is 24 - 36%, and the angle between the straight wires of the screen and the long side of the screen is 70° - 100°.

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