Filtering membrane bag

Abstract

The utility model discloses a filtering membrane bag and relates to the field of filtering equipment. The filter membrane bag comprises a rubber coating piece, a screen layer, a filter membrane layer and a cover plate. The rubber coating piece is arranged on the periphery of the filtering membrane bag; the filtering membrane layer and the screen mesh layer are arranged in a laminated mode, the cover plate is arranged on the outermost side of the filtering membrane bag in the thickness direction of the filtering membrane bag, and the cover plate comprises a structural part and a supporting part. In the integral forming process of the filtering membrane bag, the rubber coating piece can permeate into the supporting part, and after the rubber coating piece and the cover plate are connected and formed, limiting connection is formed between the rubber coating piece and the supporting part, so that the structural stability of the filtering membrane bag is improved, and a good sealing effect is achieved.

Description

Technical Field

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

[0002] According to the material flow direction, the filtration membrane separation technology can be divided into dead-end filtration and tangential flow filtration. In dead-end filtration, the material flow direction is the same as the material filtration direction. At this time, the material to be filtered is enriched on the surface of the filter membrane. As the filtration proceeds, a filter cake layer or gel layer is formed, which leads to a significant decrease in filtration efficiency and affects the service life of the filter membrane. In tangential flow filtration, the material flow direction is perpendicular to the filtration direction. At this time, the material continuously flushes the filter membrane surface, thereby flushing the filter membrane surface and increasing the service life of the filter membrane.

[0003] As one of the most common tangential flow filtration devices, the filter membrane package is formed by stacking an internal screen layer and a filter membrane. The screen layer and the filter membrane are respectively provided with corresponding liquid inlet channels, liquid outlet channels and exhaust channels. The material enters the filter membrane package through the liquid inlet channel, and under the filtering action of the filter membrane layer, the permeate is obtained and discharged through the liquid outlet channel. Before the specific filtration, the sealing ring arranged on the liquid inlet channel layer squeezes and seals the liquid inlet channel layer and the filter membrane layer, and the sealing ring arranged on the permeate channel layer connects and seals the permeate channel layer and the filter membrane layer. The overall sealing of the filter membrane package is achieved through the sealing ring and the rubber package arranged on the periphery of the filter membrane package. However, in order to ensure the overall sealing of the filter membrane package, the sealing ring is embedded in the filter membrane layer. The deformation of the filter membrane layer at the local position of the sealing ring is large, which will cause uneven force on the filter membrane layer, so that the local deformation of the filter membrane layer increases, and the filter membrane layer is prone to damage after the local deformation increases. Utility Model Content

[0004] The technical problem that the present invention is to solve or at least partially solve is that, in the related art, in order to improve the sealing performance of the filter membrane package, the height of the seal is continuously increased, resulting in an increase in the depth of the seal embedded in the filter membrane layer, which makes the local deformation of the filter membrane layer too large and causes damage. Although the local deformation of the filter membrane layer can be reduced by lowering the height of the seal, the sealing performance of the filter membrane package is reduced.

[0005] The utility model provides a filtration membrane package, comprising:

[0006] A rubber coating member, the rubber coating member is arranged on the periphery of the filter membrane package;

[0007] A screen layer and a filter membrane layer, wherein the filter membrane layer and the screen layer are stacked; the screen layer comprises a liquid inlet screen and a liquid outlet screen arranged at intervals, and the filter membrane layer is arranged between the liquid inlet screen and the liquid outlet screen;

[0008] and a cover plate, the cover plate being arranged at the outermost side of the filter membrane package along the thickness direction thereof;

[0009] The cover plate, the filter membrane layer, and the screen layer are all provided with corresponding liquid inlets, liquid outlets, and reflux ports;

[0010] A liquid inlet seal is provided at the periphery of the liquid outlet of the liquid inlet screen, and a liquid outlet seal is provided at the periphery of the liquid inlet and the reflux port of the liquid outlet screen;

[0011] Wherein, the cover plate includes a structural part and a supporting part, and the supporting parts are arranged on both sides of the structural part.

[0012] Optionally, the support portion is arranged to protrude relative to an outer edge of the structural portion, and a protruding width is 1-8 mm.

[0013] Optionally, the thickness of the structural part is 80-300 μm.

[0014] Optionally, the cover plates are provided on both outermost sides of the filter membrane package along the thickness direction thereof.

[0015] Optionally, the structural portion and the supporting portion are integrally formed.

[0016] Optionally, the support portion is a porous structure, the structural portion is configured as a planar plate structure, and the structural portion penetrates into the support portion.

[0017] Optionally, the supporting part is a non-woven fabric or a mesh structure.

[0018] Optionally, the structural part is set to any one of PE, PP, PVC, PET, silicone, polyurethane and epoxy resin.

[0019] Optionally, the seal on at least the outermost screen layer of the filter membrane package comprises a sealing protrusion, and a height h of the sealing protrusion is 50-300 μm.

[0020] Optionally, the outermost screen layer of the filter membrane package is a liquid inlet screen.

[0021] The technical solution provided by the utility model has the following advantages:

[0022] 1. The filter membrane package provided by the utility model includes a cover plate including a structural part and a supporting part, wherein the structural part is a planar plate structure, and the supporting part is protruding relative to the structural part. During the integral molding of the filter membrane package, the rubber-coated part can penetrate into the interior of the supporting part, and after the rubber-coated part is connected and molded with the cover plate, a position-limiting connection is formed between the rubber-coated part and the supporting part, thereby improving the structural stability of the filter membrane package and achieving a good sealing effect; wherein, the protruding setting of the supporting part relative to the outer edge of the structural part enables the structural part to play the role of clamping the liquid inlet seal, thereby forming an additional sealing effect, thereby improving the sealing of the peripheral area of ​​the filter membrane package.

[0023] 2. The filter membrane package provided by the utility model comprises a cover plate including a structural part and a supporting part. The structural parts are arranged on both sides of the supporting part. The cover plate provides a pre-clamping effect. After the rubber-coated part is connected and formed with the cover plate, the structural part pre-clamps the screen layer and the filter membrane layer inside the filter membrane package. As the thickness of the structural part continues to increase, the clamping effect of the filter membrane layer and the screen layer inside the filter membrane package is too large, resulting in the risk of damage to the edge area of ​​the corresponding position of the structural part. During the assembly and manufacturing process of the filter membrane package, the planar plate structure of the structural part provides an overall clamping effect on the filter membrane layer, avoiding excessive clamping effect of the seal on the local filter membrane layer, thereby protecting the structural integrity of the filter membrane layer.

[0024] 3. The filter membrane package provided by the utility model, the outermost screen layer seal includes a sealing protrusion, which is preferentially abutted against the cover plate to ensure that the sealing protrusion can fully abut against the cover plate, thereby improving the clamping effect of the internal screen layer and the filter membrane layer, and avoiding the situation when the height of the sealing protrusion is too small, the cover plate and the sealing protrusion cannot contact each other or the pre-clamping effect is not obvious after abutment; when the height of the sealing protrusion is too large, after the cover plate abuts against the sealing protrusion, the sealing protrusion excessively clamps the filter membrane package, causing the filter membrane layer to deform too much at the corresponding position of the sealing protrusion, thereby damaging the filter membrane layer. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0026] Figure 1 A schematic diagram of the structure of the filter membrane package provided by the utility model;

[0027] Figure 2 An exploded schematic diagram of the filter membrane package provided by the utility model;

[0028] Figure 3 A schematic diagram of the partial structure of the filtration membrane package provided by the utility model;

[0029] Figure 4 A schematic diagram of the structure of the liquid inlet screen in the flow filtration structure provided by the utility model;

[0030] Figure 5 A partial cross-sectional view of the filter membrane package provided by the utility model;

[0031] Figure 6 A schematic diagram of the structure of the cover plate in the flow filtering structure provided by the utility model;

[0032] Figure 7 A cross-sectional view of a cover plate in the flow filtering structure provided by the utility model;

[0033] Description of reference numerals:

[0034] 1-rubber coating; 2-liquid inlet screen; 3-filter membrane layer; 4-liquid outlet screen;

[0035] 5-cover plate; 51-structure part; 52-support part;

[0036] 61-liquid inlet; 62-liquid outlet; 63-reflux outlet;

[0037] 7-liquid inlet seal; 71-sealing protrusion; 8-liquid outlet seal. DETAILED DESCRIPTION

[0038] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments 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.

[0039] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connection", "connected", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0042] Example

[0043] This embodiment provides a filtration membrane package suitable for performing permeation, filtration, concentration and other treatments on biopharmaceutical solutions. Figures 1 to 7 The filter membrane package includes a rubber coating 1, a screen layer, a filter membrane layer 3 and a cover plate 5. The rubber coating 1 is arranged on the periphery of the filter membrane package; the filter membrane layer 3 and the screen layer are stacked, and the cover plate 5 is arranged on the outermost side of the filter membrane package along the thickness direction thereof.

[0044] See also Figure 1 The cover plate 5 is suitable for being integrally formed or fixedly arranged with the rubber-coated component 1. The cover plate 5 plays a protective role on the screen layer and the filter membrane layer 3, and the cover plate 5 and the liquid inlet screen 2 are relatively fixedly arranged.

[0045] See also Figure 2 The screen layer includes a liquid inlet screen 2 and a liquid outlet screen 4 which are arranged at intervals, and the filter membrane layer 3 is arranged between the liquid inlet screen 2 and the liquid outlet screen 4.

[0046] In some embodiments, see Figure 2 There are two cover plates 5, which are arranged at intervals, and the screen layer and the filter membrane layer 3 are stacked and assembled between the two cover plates 5. The two cover plates 5 are respectively arranged on both sides of the outermost side of the filter membrane package along the thickness direction. The outermost screen layer of the filter membrane package is set as the liquid inlet screen 2.

[0047] In this embodiment, see Figures 2 to 4 The cover plate 5, the filter membrane layer 3 and the screen layer are all provided with a liquid inlet 61, a liquid outlet 62 and a reflux port 63 at corresponding positions; a liquid inlet seal 7 is provided on the periphery of the liquid outlet 62 of the liquid inlet screen 2, and a liquid outlet seal 8 is provided on the periphery of the liquid inlet 61 and the reflux port 63 of the liquid outlet screen 4.

[0048] In this embodiment, see Figure 6 and Figure 7The cover plate 5 includes a structural portion 51 and a supporting portion 52. The structural portion 51 is arranged on both sides of the supporting portion 52; the supporting portion 52 is arranged to protrude relative to the structural portion 51. The width of the supporting portion 52 protruding relative to the structural portion 51 is 1-8 mm. In a specific embodiment, the structural portion 51 can be arranged as a planar plate structure.

[0049] In some embodiments, the support portion 52 is configured as an annular structure connected end to end.

[0050] The filter membrane package provided in the present embodiment has the function of allowing the rubber-coated component 1 to penetrate into the interior of the support portion 52 during the overall molding of the filter membrane package. After the rubber-coated component 1 is connected and solidified with the cover plate 5, a limiting connection is formed between the rubber-coated component 1 and the support portion 52, thereby improving the structural stability of the filter membrane package and achieving a good sealing effect. The support portion 52 is protruded relative to the outer edge of the structural portion 51, so that the structural portion 51 can clamp the liquid inlet seal 7, thereby forming an additional sealing effect, thereby improving the sealing of the peripheral area of ​​the filter membrane package.

[0051] In a specific implementation, the structure portion 51 and the support portion 52 are integrally formed.

[0052] The support portion 52 may be configured as a porous structure, the structural portion 51 may be configured as a planar plate structure, and the structural portion 51 may penetrate into the support portion 52 .

[0053] The filter membrane package provided in this embodiment, the cover plate 5 includes a structural part 51 and a supporting part 52, the structural parts 51 are arranged on both sides of the supporting part 52, and the cover plate 5 provides a pre-clamping effect. The thickness of the structural part 51 is 80-300μm. After the rubber coating 1 and the cover plate 5 are connected and formed, the structural part 51 pre-clamps the screen layer and the filter membrane layer 3 inside the filter membrane package. As the thickness of the structural part 51 continues to increase, the clamping effect of the filter membrane layer 3 and the screen layer inside the filter membrane package is too large, resulting in the risk of damage to the edge area of ​​the corresponding position of the structural part 51; during the assembly and manufacturing process of the filter membrane package, the planar plate structure of the structural part 51 provides an overall clamping effect on the filter membrane layer 3, avoiding excessive clamping effect of the seal on the local filter membrane layer 3, thereby protecting the structural integrity of the filter membrane layer 3.

[0054] The outermost screen layer seal includes a sealing protrusion 71. For details, see Figure 5The liquid inlet seal 7 is provided with the sealing protrusion 71, and the sealing protrusion 71 is preferentially abutted with the cover plate 5, and the height h of the sealing protrusion 71 is 50-300 μm, so as to ensure that the sealing protrusion 71 can fully abut with the cover plate 5, improve the clamping effect of the internal screen layer and the filter membrane layer 3, and avoid that when the height of the sealing protrusion 71 is too small, the cover plate 5 and the sealing protrusion 71 cannot contact each other or the pre-clamping effect is not obvious after abutment, and when the height of the sealing protrusion 71 is too large, after the cover plate 5 abuts against the sealing protrusion 71, the sealing protrusion 71 excessively clamps the filter membrane package, causing the filter membrane layer 3 to be excessively deformed at the corresponding position of the sealing protrusion 71, thereby damaging the filter membrane layer 3. Preferably, the height h of the sealing protrusion 71 is 30-150 μm.

[0055] In some embodiments, the structure portion 51 is configured to be any one of PE, PP, PVC, PET, silicone, polyurethane and epoxy resin.

[0056] In some embodiments, the support portion 52 is a non-woven fabric or mesh structure. During the molding process of the cover plate 5, the structural portion 51 can penetrate into the support portion 52, which is beneficial to improving the self-connection strength of the cover plate 5 and enhancing the sealing of the structure.

[0057] The rubber-coated component 1 and the filter membrane layer 3 are sealed and connected, and the sealing method is set to be one or more of welding sealing, adhesive sealing, fusion sealing and rubber-coated sealing.

[0058] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A filtration membrane package, characterized in that: include: A rubber coating member (1), the rubber coating member (1) being arranged on the periphery of the filter membrane package; A screen layer and a filter membrane layer (3), wherein the filter membrane layer (3) and the screen layer are stacked; the screen layer comprises a liquid inlet screen (2) and a liquid outlet screen (4) arranged at intervals, and the filter membrane layer (3) is arranged between the liquid inlet screen (2) and the liquid outlet screen (4); and a cover plate (5), wherein the cover plate (5) is arranged at the outermost side of the filter membrane package along the thickness direction thereof; The cover plate (5), the filter membrane layer (3) and the screen layer are all provided with a liquid inlet (61), a liquid outlet (62) and a reflux port (63) at corresponding positions; A liquid inlet seal (7) is provided on the periphery of the liquid outlet (62) of the liquid inlet screen (2), and a liquid outlet seal (8) is provided on the periphery of the liquid inlet (61) and the reflux port (63) of the liquid outlet screen (4); The cover plate (5) comprises a structural portion (51) and a supporting portion (52), and the supporting portion (52) is arranged on both sides of the structural portion (51).

2. The filtration membrane package according to claim 1, characterized in that The support portion (52) is arranged to protrude relative to the outer edge of the structural portion (51), and the protruding width is 1-8 mm.

3. The filtration membrane package according to claim 1, characterized in that The thickness of the structural part (51) is 80-300 μm.

4. The filtration membrane package according to claim 1, characterized in that The cover plates (5) are arranged on both sides of the outermost sides of the filter membrane package along the thickness direction.

5. The filtration membrane package according to claim 1, characterized in that: The structural part (51) and the supporting part (52) are integrally formed.

6. The filtration membrane package according to claim 5, characterized in that: The support portion (52) is a porous structure, the structural portion (51) is configured as a planar plate structure, and the structural portion (51) penetrates into the support portion (52).

7. The filtration membrane package according to any one of claims 1 to 6, characterized in that: The supporting part (52) is a non-woven fabric or a mesh structure.

8. The filtration membrane package according to any one of claims 1 to 6, characterized in that: The structural part (51) is configured to be any one of PE, PP, PVC, PET, silicone, polyurethane and epoxy resin.

9. The filtration membrane package according to any one of claims 1 to 6, characterized in that: The sealing element on at least the outermost screen layer of the filter membrane package comprises a sealing protrusion (71), and the height h of the sealing protrusion (71) is 50-300 μm.

10. The filtration membrane package according to any one of claims 1 to 6, characterized in that: The outermost screen layer of the filter membrane package is the liquid inlet screen (2).

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