Filtering membrane bag with high sealing performance

Abstract

The utility model discloses a high leakproofness filtration membrane package, including at least one membrane package main body, the membrane package main body includes at least one liquid inlet unit and liquid outlet unit stacked with the liquid inlet unit, the periphery of the membrane package main body is provided with a glue sealing part, the liquid inlet unit includes a liquid inlet screen, and the liquid outlet unit includes a liquid outlet screen. The liquid inlet unit comprises a liquid inlet screen and a liquid outlet screen, the liquid outlet unit comprises a liquid outlet screen and a filter membrane, the liquid inlet screen, the liquid outlet screen and the filter membrane are provided with corresponding liquid inlets, liquid outlets and reflux inlets, the liquid inlet of the liquid outlet screen and the reflux inlets of the liquid outlet screen are respectively provided with a packaging part, and a liquid outlet clamping part is arranged at the edge of the liquid outlet screen. The liquid outlet clamping part is arranged in the thickness direction of the liquid outlet screen in a penetrating manner, and the liquid outlet clamping part is matched with the adjacent filtering membrane in a sealing manner. The utility model aims to effectively improve the peripheral sealing performance of the membrane bag main body, so as to ensure the integrity of the filtering membrane bag.

Description

Technical Field

[0001] The utility model belongs to the technical field of filtering equipment, and in particular relates to a high-sealability filtering membrane package. Background Art

[0002] The filter membrane package is a common tangential flow filtration device, which can also be used for vertical flow filtration according to the operation mode during filtration, and includes a filter membrane package body formed by stacking a liquid inlet unit and a liquid outlet unit, wherein the liquid inlet unit and the liquid outlet unit both include a screen, and the liquid outlet unit includes a filter membrane. The liquid inlet unit and the liquid outlet unit are both provided with a liquid inlet, a liquid outlet and a reflux port for materials to enter and exit the filter membrane package, wherein the periphery of the liquid outlet of the liquid inlet unit and the periphery of the liquid inlet of the liquid outlet unit are both sealed. After the material enters the filter membrane package along the liquid inlet, it is distributed along the liquid inlet unit, and then under the action of the filter membrane, the filtered permeate is obtained, which converges to the liquid outlet along the liquid outlet unit and is discharged from the filter membrane package.

[0003] The periphery of the filter membrane package body is sealed by the sealing part, but as the use time of the filter membrane package increases, the sealing part is washed by the material and becomes damaged, which directly affects the sealing effect of the periphery of the filter membrane package body. Although the filter membrane package needs to be clamped by an external clamping device during use, the periphery of the filter membrane package body is only sealed by the sealing part, and the clamping device has no obvious sealing effect on the periphery of the filter membrane package body. As a result, during the use of the filter membrane package, the integrity of the filter membrane package is affected due to the poor sealing effect of the periphery of the filter membrane package body. Utility Model Content

[0004] The utility model provides a high-sealability filtering membrane package, which can effectively improve the peripheral sealing performance of the membrane package body, thereby ensuring the integrity of the filtering membrane package.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A high-sealing filter membrane package comprises at least one membrane package main body, the membrane package main body comprises at least one liquid inlet unit and a liquid outlet unit stacked with the liquid inlet unit, a sealing portion is provided on the periphery of the membrane package main body, the liquid inlet unit comprises a liquid inlet screen, the liquid outlet unit comprises a liquid outlet screen and a filter membrane, the liquid inlet screen, the liquid outlet screen and the filter membrane are all provided with corresponding liquid inlets, liquid outlets and reflux ports, the liquid inlet of the liquid outlet screen and the reflux port of the liquid outlet screen are respectively provided with packaging portions, a liquid outlet clamping portion is provided at the edge of the liquid outlet screen, the liquid outlet clamping portion is arranged to penetrate along the thickness direction of the liquid outlet screen, and the liquid outlet clamping portion is sealed and matched with an adjacent filter membrane. The liquid outlet clamping part is arranged on the liquid outlet screen. When the membrane package body is clamped as a whole by an external clamping device, the liquid outlet clamping part can clamp the adjacent filter membrane and the liquid inlet screen, and seal the periphery of the membrane package body to prevent the permeate and the material from directly contacting the sealing part, thereby improving the sealing effect of the peripheral part of the membrane package body and ensuring the integrity of the filter membrane package.

[0007] Preferably, a gap is provided between the liquid outlet clamping portion and the edge of the liquid outlet screen. By providing the gap, space is reserved for the molding of the sealing portion on the periphery of the filter membrane package, so that the sealing portion can penetrate into the liquid outlet screen, thereby improving the overall structural stability of the filter membrane package.

[0008] Preferably, the liquid outlet clamping part and the packaging part of the liquid outlet screen overlap at least partially, so as to ensure the effective filtering area of ​​the filter membrane, reduce the dead angle area between the liquid outlet clamping part and the packaging part, and avoid material enrichment affecting the filtering efficiency.

[0009] Preferably, the edge of the liquid outlet screen is closely fitted or fixedly connected to the adjacent filter membrane through the liquid outlet clamping part. The liquid outlet clamping part is closely fitted or fixedly connected to the filter membrane, which can effectively ensure the sealing effect of the position where the liquid outlet clamping part is located.

[0010] Preferably, the width of the liquid outlet clamping portion is 2 to 8 mm. The liquid outlet clamping portion has a certain width to ensure the clamping effect of the liquid outlet clamping portion on the periphery of the sealing filter membrane package.

[0011] Preferably, the thickness of the liquid outlet screen is 250 to 600 μm, and the thickness of the liquid outlet screen is less than or equal to the thickness of the liquid inlet screen. The liquid outlet screen is provided with a certain thickness, which is conducive to forming a flow channel for the permeate, and at the same time provides support for the liquid outlet clamping part to prevent the liquid outlet clamping part and the screen from twisting and other deformations that damage the integrity of the filter membrane package during the preparation and use of the filter membrane package. Since the flow rate of the filtered permeate is less than that of the material at the liquid inlet unit, the thickness of the liquid outlet screen is smaller than that of the liquid inlet screen, which is conducive to improving the utilization rate of the filter membrane package.

[0012] Preferably, the thickness of the liquid outlet unit at the liquid outlet clamping portion is 500 to 1200 μm, and the thickness of the liquid outlet unit at the liquid outlet clamping portion is 1.8 to 3.2 times the thickness of the liquid outlet screen. The liquid outlet clamping portion protrudes from the liquid outlet screen, and squeezes the adjacent filter membrane and the liquid inlet screen, thereby sealing the periphery of the membrane package body and preventing the material from scouring the sealing portion outside the filter membrane package body.

[0013] Preferably, a liquid inlet clamping part is provided at the edge of the liquid inlet screen, and the liquid inlet clamping part is arranged through the thickness direction of the liquid outlet screen. When the filter membrane package is clamped, the liquid inlet clamping part and the liquid outlet clamping part squeeze each other, thereby further improving the sealing performance of the outer periphery of the membrane package body.

[0014] Preferably, the thickness of the liquid inlet unit at the liquid inlet clamping part is 1 to 1.5 times the thickness of the liquid inlet screen. When the thickness of the liquid inlet unit at the liquid inlet clamping part is appropriate, as the clamping effect is enhanced, the liquid inlet clamping part can be tightly clamped with the liquid outlet clamping part, thereby achieving sealing of the peripheral part of the filter membrane package body, while preventing the liquid inlet clamping part from being embedded in the filter membrane, thereby playing a certain protective role on the filter membrane.

[0015] Preferably, the liquid inlet clamping part and the liquid outlet clamping part at least partially overlap on the projection of the filter membrane, and the width of the overlapping area is at least 40% of the width of the liquid outlet clamping part. As the width of the overlapping area between the liquid inlet clamping part and the liquid outlet clamping part increases, sufficient clamping is formed between the liquid inlet clamping part and the liquid outlet clamping part, thereby sealing the outer periphery of the membrane package body and preventing the material from damaging the sealing part. At the same time, the spatial misalignment between the liquid inlet clamping part and the liquid outlet clamping part is avoided, which causes the filter membrane to fold and break.

[0016] Preferably, the liquid outlet clamping portion and / or the liquid inlet clamping portion is made of any one of polypropylene, polyethylene, silicone, epoxy resin and polyurethane.

[0017] The beneficial effects of the utility model are as follows: (1) by arranging a liquid outlet clamping part on the liquid outlet screen, the sealing performance of the outer periphery of the membrane package body is improved, and the material is prevented from contacting and eroding the outer periphery of the sealing part when flowing inside the filter membrane package, thereby ensuring the integrity of the filter membrane package and improving the service life of the filter membrane package; (2) the liquid outlet clamping part has a certain width, which improves the sealing effect on the outer periphery of the membrane package body under the clamping action, and at the same time can improve the strength of the outer periphery of the membrane package body, reduce the deformation of the outer periphery of the membrane package body under the clamping action, and protect the filter membrane; (3) the liquid inlet clamping part and the liquid outlet clamping part at least partially overlap on the projection of the filter membrane, and the outer periphery of the membrane package body is fully sealed by the mutual clamping between the liquid inlet clamping part and the liquid outlet clamping part. At the same time, the overlapping arrangement can also avoid the liquid inlet clamping part and the liquid outlet clamping part from clamping multiple scattered areas on the filter membrane, thereby preventing the filter membrane from being folded and dislocated and damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the liquid outlet screen of the utility model;

[0020] Figure 3 It is a cross-sectional view of the liquid outlet unit of the utility model;

[0021] Figure 4 This is a schematic structural diagram of a liquid inlet unit in Embodiment 3 of the present utility model;

[0022] Figure 5 This is a schematic diagram of the projection of the liquid inlet clamping part and the liquid outlet clamping part on the filter membrane in Example 3 of the utility model;

[0023] Figure 6 yes Figure 5 A partial enlarged schematic diagram of the end portion;

[0024] Figure 7 It is a schematic structural diagram of the liquid outlet screen of Example 4 of the present utility model.

[0025] In the figure: membrane package body 1, liquid outlet 1a, liquid inlet 1b, reflux port 1c, liquid outlet unit 11, liquid outlet screen 111, liquid outlet clamping part 112, filter membrane 113, liquid inlet unit 12, liquid inlet screen 121, liquid inlet clamping part 122, packaging part 101, overlapping area 13, and glue sealing part 2. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0027] Example 1

[0028] like Figure 1 In the embodiment shown, a high-sealability filtration membrane package includes a membrane package body 1, the membrane package body 1 includes a liquid outlet unit 11 and liquid inlet units 12 located at the upper and lower sides of the liquid outlet unit 11, the liquid outlet unit 11 and the liquid inlet unit 12 are stacked to form the membrane package body 1, and the outer periphery of the membrane package body 1 is also provided with a sealing portion 2 for sealing. Among them, the liquid inlet unit 12 includes a liquid inlet screen 121, such as Figure 3As shown, the liquid outlet unit 11 includes a liquid outlet screen 111 and a filter membrane 113. The filter membrane 113 is respectively arranged on the upper and lower sides of the liquid outlet screen 111. The liquid inlet screen 121 and the liquid outlet screen 111 can select suitable screen structures and materials in the prior art to facilitate the flow of materials and permeate in the membrane package body 1. The filter membrane 113 can be made of suitable materials such as ultrafiltration membranes, nanofiltration membranes, etc. according to the actual pore size and interception requirements to achieve the interception of small particle impurities, bacteria and even viruses. The liquid inlet screen 121, the liquid outlet screen 111 and the filter membrane 113 are all provided with corresponding liquid inlet ports 1b, liquid outlet ports 1a and reflux ports 1c, thereby forming corresponding liquid inlet channels, liquid outlet channels and reflux channels on the membrane package body 1. As shown Figure 1 As shown, the liquid outlet 1a of the liquid inlet screen 121 is provided with a packaging portion 101, such as Figure 2 As shown, the liquid inlet 1b of the liquid outlet screen 111 and the reflux port 1c of the liquid outlet screen 111 are also respectively provided with a packaging portion 101, forming a seal at the liquid outlet 1a of the liquid inlet screen 121, the liquid inlet 1b of the liquid outlet screen 111 and the reflux port 1c of the liquid outlet screen 111, thereby ensuring the stable flow direction of the material and the permeate.

[0029] like Figure 2 , Figure 3 As shown, a liquid outlet clamping portion 112 made of polyethylene is provided at the edge of the liquid outlet screen 111, and the liquid outlet clamping portion 112 is arranged to penetrate along the thickness direction of the liquid outlet screen 111, and the liquid outlet clamping portion 112 is sealed with an adjacent filter membrane 113. The liquid outlet clamping portion 112 partially overlaps with the packaging portion 101 of the liquid outlet screen 111, thereby reducing the dead volume of the liquid outlet screen 111 and increasing the yield of the permeate.

[0030] The thickness d of the liquid outlet screen 111 is 250 to 600 μm. In this embodiment, the thickness d of the liquid outlet screen 111 is 300 μm. By setting the liquid outlet screen 111 at a suitable height, a flow channel for the permeate is formed, and at the same time, support is provided for the liquid outlet clamping portion 112 to prevent the liquid outlet clamping portion 112 and the liquid outlet screen 111 from twisting and other deformations during the preparation and use of the filter membrane package, which is beneficial to maintaining the integrity of the filter membrane package. The thickness of the liquid outlet screen 111 is less than or equal to the thickness of the liquid inlet screen 121. Since the flow rate of the filtered permeate is less than that of the material at the liquid inlet unit 12, the thickness of the liquid outlet screen 111 is smaller than that of the liquid inlet screen 121, which is beneficial to improving the utilization rate of the filter membrane package.

[0031] The thickness c of the liquid outlet unit 11 at the liquid outlet clamping portion 112 is 500 to 1200 μm. In this embodiment, the thickness c of the liquid outlet unit 11 at the liquid outlet clamping portion 112 is 600 μm, and the thickness c of the liquid outlet unit 11 at the liquid outlet clamping portion 112 is twice the thickness of the liquid outlet screen 111. The liquid outlet clamping portion 112 protrudes from the upper and lower surfaces of the liquid outlet screen 111, and squeezes the adjacent filter membrane 113 and the liquid inlet screen 121, thereby sealing the periphery of the membrane package body 1 to prevent the material from scouring the sealing portion 2 outside the membrane package body 1. When the protrusion thickness of the liquid outlet clamping part 112 relative to the liquid outlet screen 111 is small, the buffer of the filter membrane 113 makes it impossible for the liquid outlet clamping part 112 to form a seal on the periphery of the membrane package body 1; when the protrusion thickness of the liquid outlet clamping part 112 relative to the liquid outlet screen 111 is large, the liquid outlet clamping part 112 fully clamps and seals the periphery of the membrane package body 1, but the excessively protruding liquid outlet clamping part 112 presses the filter membrane 113, which easily causes the filter membrane 113 to be damaged. In this embodiment, the edge of the liquid outlet screen 111 is tightly fitted with the adjacent filter membrane 113 through the liquid outlet clamping part 112 to achieve a sealing effect.

[0032] like Figure 2 As shown, the width a of the liquid outlet clamping portion 112 is 2 to 8 mm. In this embodiment, the width a of the liquid outlet clamping portion 112 is 5 mm. When the width of the liquid outlet clamping portion 112 is less than 2 mm, the filter membrane 113 and the liquid inlet unit 12 cannot be fully clamped during the clamping process of the filter membrane package in the external clamping device. At the same time, the liquid outlet clamping portion 112 with a width that is too small exerts too much pressure on the filter membrane 113, which can easily cause the filter membrane 113 to be damaged; when the width of the liquid outlet clamping portion 112 is greater than 8 mm, the liquid outlet clamping portion 112 can fully squeeze the filter membrane 113 and the liquid inlet unit 12 and ensure that the filter membrane 113 is not damaged. However, the width of the liquid outlet clamping portion 112 is too large, resulting in insufficient pressurization effect, resulting in insufficient sealing effect of the periphery of the filter membrane package under a high-intensity working environment; when the width of the liquid outlet clamping portion 112 is 2 to 8 mm, the liquid outlet clamping portion 112 can squeeze the filter membrane 113 and the periphery of the liquid inlet unit 12 to form a seal without damaging the filter membrane 113, thereby preventing the material from scouring the sealing portion 2 and causing damage or affecting the smoothness of the filtration.

[0033] like Figure 2 As shown, a gap b is provided between the liquid outlet clamping portion 112 and the edge of the liquid outlet screen 111. By providing the gap, the sealing portion 2 can penetrate into the liquid outlet screen 111, increase the connection between the sealing portion 2 and the liquid outlet screen 111, and thus improve the overall structural stability of the membrane package body 1. The gap b can be set according to the actual requirements such as the width of the sealing portion 2 and the sealing process, so as to ensure that the sealing portion 2 can penetrate smoothly and combine with the liquid outlet screen 111.

[0034] After the material enters the membrane package body 1 from the liquid inlet 1b, it diffuses along the liquid inlet screen 121 to achieve distribution of the material on the liquid inlet unit 12, and then under the filtering action of the filter membrane 113, filtered permeate is obtained, while impurities are retained by the filter membrane 113, and the permeate flows along the liquid outlet screen 111 to the liquid outlet 1a, and is discharged from the membrane package body 1 from the liquid outlet unit 11.

[0035] Example 2

[0036] The difference between Example 2 and Example 1 is that the liquid outlet screen 111 is fixedly connected to the filter membranes 113 on both sides through the liquid outlet clamping part 112, and the fixed connection method is preferably welding or bonding, which further enhances the sealing performance while improving the strength at the edge of the membrane package body, which is beneficial to reduce the torsional deformation after clamping by the external clamping device, thereby ensuring the integrity and filtration efficiency of the filter membrane package.

[0037] Example 3

[0038] The difference between Example 3 and Example 1 is that Figure 4 As shown, a polyethylene liquid inlet clamping portion 122 is provided at the edge of the liquid inlet screen 121, and the liquid inlet clamping portion 122 is arranged to penetrate along the thickness direction of the liquid outlet screen 111. The thickness of the liquid inlet unit 12 at the liquid inlet clamping portion 122 is 1 to 1.5 times the thickness of the liquid inlet screen 121. When the filter membrane package is clamped, the liquid inlet clamping portion 122 of the liquid inlet unit 12 and the liquid outlet clamping portion 112 squeeze each other to form a seal on the periphery of the membrane package body 1. When the thickness of the liquid inlet clamping portion 122 of the liquid inlet unit 12 is too small, during the clamping process of the filter membrane package, the liquid inlet clamping portion 122 and the liquid outlet clamping portion 112 cannot fully contact or directly clamp each other, resulting in the inability to seal the outer periphery of the membrane package body 1; and when the thickness of the liquid inlet clamping portion 122 of the liquid inlet unit 12 is too large, the liquid inlet clamping portion 122 protrudes excessively, resulting in the liquid inlet clamping portion 122 squeezing and sealing the adjacent liquid outlet unit 11 when the filter membrane package is not clamped, and with the increase of the clamping effect, the liquid inlet clamping portion 122 is embedded in the filter membrane 113, causing the filter membrane 113 to be damaged. In this embodiment, the thickness of the liquid inlet unit 12 at the liquid inlet clamping part 122 is 1.05 times the thickness of the liquid inlet screen 121. The liquid inlet clamping part 122 protrudes from the liquid inlet screen 121. During the use of the filtration membrane package, the liquid inlet clamping part 122 and the liquid outlet clamping part 112 can fully seal the outer periphery of the membrane package body 1.

[0039] The liquid inlet clamping portion 122 and the liquid outlet clamping portion 112 at least partially overlap on the projection of the filter membrane 113, and the width e of the overlapping area 13 is at least 40% of the width a of the liquid outlet clamping portion 112. When there is no overlap between the liquid inlet clamping portion 122 and the liquid outlet clamping portion 112, there is a misalignment between the liquid inlet clamping portion 122 and the liquid outlet clamping portion 112, which causes the filter membrane 113 to fold and be damaged, affecting the integrity of the filter membrane package; and when the width of the overlapping area 13 between the liquid inlet clamping portion 122 and the liquid outlet clamping portion 112 is small, the mutual clamping effect between the liquid inlet clamping portion 122 and the liquid outlet clamping portion 112 is not obvious, and the liquid inlet clamping portion 122 increases the height of the liquid inlet unit 12, which reduces the overall utilization rate of the filter membrane package. In this embodiment, Figure 5 , Figure 6 As shown, the width e of the liquid inlet clamping part 122 and the liquid outlet clamping part 112 in the filter membrane 113 is more than 50% of the width a of the liquid outlet clamping part 112. During the clamping process, the external clamping device acts on the filter membrane package, so that the liquid inlet clamping part 122 and the liquid outlet clamping part 112 are mutually clamped, which is conducive to reducing the design height of the liquid inlet clamping part 122 and the liquid outlet clamping part 112, improving the overall utilization rate of the filter membrane package, and reducing the probability of damage to the filter membrane 113.

[0040] Example 4

[0041] The difference between Example 4 and Example 3 is that Figure 7 As shown, the packaging part 101 and the liquid outlet clamping part 112 on the liquid outlet screen 111 are independent components and there is no overlap between them. For the case where the membrane package main body 1 is larger in size or the liquid outlet 1a is far from the edge of the liquid outlet screen 111, the packaging part 101 and the liquid outlet clamping part 112 do not overlap, which can effectively guarantee the effective filtration area of ​​the filter membrane 113 while ensuring the sealing performance.

[0042] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A high-sealing filtration membrane package, comprising at least one membrane package body (1), the membrane package body (1) comprising at least one liquid inlet unit (12) and a liquid outlet unit (11) stacked and arranged with the liquid inlet unit (12), a sealing portion (2) being provided on the periphery of the membrane package body (1), the liquid inlet unit (12) comprising a liquid inlet screen (121), the liquid outlet unit (11) comprising a liquid outlet screen (111) and a filtration membrane (113), the liquid inlet screen (121), the liquid outlet screen (111) and the filtration membrane (113) being provided with corresponding liquid inlets (1b), liquid outlets (1a) and reflux ports (1c), the liquid inlet (1b) of the liquid outlet screen (111) and the reflux port (1c) of the liquid outlet screen (111) being provided with packaging portions (101), characterized in that: A liquid outlet clamping portion (112) is provided at the edge of the liquid outlet screen (111), and the liquid outlet clamping portion (112) is arranged to penetrate the liquid outlet screen (111) in the thickness direction, and the liquid outlet clamping portion (112) is sealed and matched with an adjacent filter membrane (113).

2. A high-sealability filtration membrane package according to claim 1, characterized in that: A gap is provided between the liquid outlet clamping portion (112) and the edge of the liquid outlet screen (111).

3. A high-sealability filtration membrane package according to claim 1, characterized in that: The liquid outlet clamping portion (112) at least partially overlaps with the packaging portion (101) of the liquid outlet screen (111).

4. A high-sealability filtration membrane package according to claim 1, characterized in that: The edge of the liquid outlet screen (111) is tightly fitted or fixedly connected to the adjacent filter membrane (113) via the liquid outlet clamping portion (112).

5. A high-sealability filtration membrane package according to any one of claims 1 to 4, characterized in that: The width of the liquid outlet clamping portion (112) is 2 to 8 mm.

6. A high-sealability filtration membrane package according to any one of claims 1 to 4, characterized in that: The thickness of the liquid outlet screen (111) is 250 to 600 μm, and the thickness of the liquid outlet screen (111) is less than or equal to the thickness of the liquid inlet screen (121).

7. A high-sealability filtration membrane package according to any one of claims 1 to 4, characterized in that: The thickness of the liquid outlet unit (11) at the liquid outlet clamping portion (112) is 500 to 1200 μm, and the thickness of the liquid outlet unit (11) at the liquid outlet clamping portion (112) is 1.8 to 3.2 times the thickness of the liquid outlet screen (111).

8. The high-sealability filtration membrane package according to claim 1, characterized in that: A liquid inlet clamping portion (122) is provided at the edge of the liquid inlet screen (121), and the liquid inlet clamping portion (122) is arranged to penetrate along the thickness direction of the liquid outlet screen (111).

9. A high-sealability filtration membrane package according to claim 8, characterized in that: The thickness of the liquid inlet unit (12) at the liquid inlet clamping portion (122) is 1 to 1.5 times the thickness of the liquid inlet screen (121).

10. A high-sealability filtration membrane package according to claim 8, characterized in that: The liquid inlet clamping portion (122) and the liquid outlet clamping portion (112) at least partially overlap on the projection of the filter membrane (113), and the width of the overlapping area is at least 40% of the width of the liquid outlet clamping portion (112).

11. A high-sealability filtration membrane package according to any one of claims 8 to 10, characterized in that: The material of the liquid outlet clamping portion (112) and / or the liquid inlet clamping portion (122) is any one of polypropylene, polyethylene, silicone, epoxy resin and polyurethane.

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