A filter membrane package with an open flow channel

Abstract

The utility model discloses a filter membrane package with an open flow channel, comprising a liquid inlet unit, a filter membrane layer, a filter unit and a rubber package located on the outside, wherein the filter unit and the filter membrane layer are provided with a liquid inlet, a liquid outlet and a reflux port for material flow, the liquid inlet unit comprises a gasket ring corresponding to the liquid outlet of the filter membrane layer, the gasket ring is provided with a gasket ring liquid outlet connected to the liquid outlet, and the gasket ring seals the outer periphery of the liquid outlet of the liquid inlet surface of the filter membrane layer. The utility model aims to form an open flow channel for the filter membrane package by setting the gasket ring in the liquid inlet unit, reduce the resistance to the material, and thus improve the filtration efficiency of the filter membrane package.

Description

Technical Field

[0001] The utility model belongs to the technical field of filter filtration, and in particular relates to a filter membrane package with an open flow channel. Background Art

[0002] The filtration membrane separation technology can be divided into dead-end filtration and tangential flow filtration according to the material flow direction. The filtration membrane package is the most common tangential flow filtration device, which is formed by stacking the internal filtration unit and the filtration membrane. The adjacent filtration membranes are arranged relative to each other, so that the liquid inlet surface or the liquid outlet surface of the filtration membrane are arranged relative to each other, and the adjacent liquid inlet surfaces form a liquid inlet channel, and the adjacent liquid outlet surfaces form a liquid outlet channel. The material flows through the liquid inlet of the filtration membrane package into the liquid inlet channel, is filtered by the filtration membrane, enters the liquid outlet channel, and is discharged from the filtration membrane package along the liquid outlet of the filtration membrane package.

[0003] For example, Chinese patent publication number: CN219764735U discloses a filter membrane package and a filter, which are composed of one or more stacked liquid inlet units and filter units. The liquid inlet unit and the filter unit of the filter membrane package use a screen as the main structure, which is sealed by a sealing ring arranged on the screen. When the material flows through the main body of the screen structure, the material is subjected to greater resistance, and the overall filtration efficiency of the filter membrane package is low. Utility Model Content

[0004] The utility model provides a filter membrane package with an open flow channel. By arranging a gasket ring in a liquid inlet unit, the filter membrane package forms an open flow channel, reduces the resistance of materials, and thus improves the filtration efficiency of the filter membrane package.

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

[0006] A filter membrane package with an open flow channel includes a liquid inlet unit, a filter membrane layer, a filter unit and a rubber package located on the outside, wherein the filter unit and the filter membrane layer are provided with a liquid inlet, a liquid outlet and a reflux port for material flow, and the liquid inlet unit includes a gasket corresponding to the liquid outlet of the filter membrane layer, the gasket is provided with a gasket outlet connected to the liquid outlet, and the gasket seals the outer periphery of the liquid outlet of the liquid inlet surface of the filter membrane layer. By setting the gasket, an open liquid inlet flow channel is formed, and the material can flow quickly between the filter membrane layers, which greatly improves the filtration efficiency of the filter membrane package. At the same time, the gasket acts as a sealing member to seal the filter membrane package, thereby ensuring the sealing effect of the filter membrane package.

[0007] Preferably, the gasket includes at least one sealing layer, and when the gasket includes two or more sealing layers, a support layer is provided between adjacent sealing layers. The support layer is located between the two sealing layers to improve the structural stability of the gasket.

[0008] Preferably, the filter unit is provided with a seal for sealing the corresponding liquid inlet and reflux port, and there is an overlapping area between the gasket and at least one of the seals on one side in the projection in the thickness direction of the filter membrane package. There is a certain contact area between the gasket and the seal, which can provide additional squeezing force to improve the sealing effect.

[0009] Preferably, the overlapping area between the gasket and the seal on one side occupies 5-30% of the total area of ​​the gasket. The overlapping area accounts for a moderate proportion, ensuring the squeezing effect between the gasket and the seal to improve the sealing performance. At the same time, the thickness difference between the gasket and the seal in the non-overlapping area on both sides and the overlapping area is not large, which can avoid damage to the filter membrane layer.

[0010] Preferably, the minimum width between the outer edge of the gasket ring and the edge of the gasket ring liquid outlet is 2-9 mm. The gasket ring maintains its sealing effect on the filter membrane package while avoiding blocking the flow of materials in adjacent through holes.

[0011] Preferably, the gaskets on the same side of the liquid inlet unit are connected to form a whole, so that the gaskets on the same side have a higher integrity, thereby improving the positioning effect of the gaskets on the filter membrane layer and the filter unit.

[0012] Preferably, the thickness of the gasket is 0.1-0.8 mm. The reasonable thickness of the gasket allows a certain interval between the filter membrane layers to form a flow channel for the material, and the gasket can provide support and protection for the filter membrane layers.

[0013] Preferably, support bars are connected between the gaskets at both ends of the liquid inlet unit to support adjacent filter membrane layers of the liquid inlet unit to prevent the filter membrane layers from fitting together or between the filter membrane layers and the external fixture, thereby ensuring the effective filter area of ​​the filter membrane package.

[0014] Preferably, the support bar and the gasket are connected by welding, bonding or integral molding.

[0015] Preferably, the support bar is a screen, the mesh diameter of the screen is 0.2-0.5 mm, and the opening rate is 24-36%. The support bar with a screen structure can improve the fluidity of the material and avoid stratification of the material during flow. The support bar will not affect the normal flow of the material through the opening design, ensuring the filtration efficiency and filtration stability.

[0016] Preferably, the liquid inlet unit is provided with a connecting ring at a corresponding position of the peripheral area of ​​the filter membrane layer, and the connecting ring is integrally formed with the gasket ring. The connecting ring further improves the sealing performance of the peripheral area of ​​the filter membrane layer and can prevent the filter membrane layer on both sides of the filter membrane package where no gasket ring is provided from collapsing and damaging.

[0017] Preferably, the gasket is made of any one of PE, PA, rubber, PMMA and PP.

[0018] The beneficial effects of the present invention are: (1) by setting the gasket ring, a complete open flow channel is provided between the filter membrane layers, the material flow resistance is reduced, and the material can flow quickly between the filter membrane layers, thereby improving the filtration efficiency of the filter membrane package; (2) the gasket ring acts as a sealing member to ensure the sealing effect of the filter membrane package, and the sealing performance can be further improved by integrally forming the gasket ring, and the structural stability of the filter membrane layers at both ends of the filter membrane package can be improved; (3) support strips are provided between the gasket rings to provide support for the filter membrane layer at the center of the filter membrane package and prevent adjacent filter membrane layers from fitting together; (4) the entire periphery of the filter membrane layer is supported by the connecting ring, so as to avoid fitting of the filter membrane layer edges and improve the overall structural stability of the filter membrane package. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 It is a cross-sectional view of the liquid outlet position of the utility model;

[0021] Figure 3 This is a schematic structural diagram of a liquid inlet unit in Embodiment 1 of the present utility model;

[0022] Figure 4 It is a cross-sectional view of the gasket ring of the utility model;

[0023] Figure 5 It is a projection schematic diagram of the filter membrane layer of the utility model;

[0024] Figure 6 yes Figure 5 A partial enlarged view of the position of the middle liquid inlet;

[0025] Figure 7 This is a schematic structural diagram of a liquid inlet unit in Embodiment 2 of the present utility model;

[0026] Figure 8 This is a schematic structural diagram of a liquid inlet unit in Embodiment 3 of the present utility model;

[0027] Fig. 9 This is a schematic structural diagram of a liquid inlet unit in Embodiment 4 of the present utility model;

[0028] Fig.10 It is a structural schematic diagram of the liquid inlet unit of Example 5 of the utility model.

[0029] In the figure: reflux port 1, rubber coating 2, liquid inlet unit 3, gasket 3a, gasket liquid outlet 301, connecting strip 3b, connecting ring 3c, support strip 3d, sealing layer 31, support layer 32, liquid inlet 4, liquid outlet 5, filter membrane layer 6, liquid inlet surface 6a, liquid outlet surface 6b, filter unit 7, sealing member 8, overlapping area 9. DETAILED DESCRIPTION

[0030] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0031] Example 1

[0032] like Figure 1 In the embodiment shown, an open-channel filtration membrane package includes a liquid inlet unit 3, a filtration membrane layer 6, a filtration unit 7, and a rubber package 2 located on the outside. The filtration unit 7 and the filtration membrane layer 6 are provided with a liquid inlet 4, a liquid outlet 5, and a reflux port 1 for material flow. Figure 2 As shown, after the liquid inlet unit 3, the filter membrane layer 6 and the filter unit 7 are stacked, the filter membrane package is formed. A plurality of such stacked structures can also be arranged in a single filter membrane package, and finally the complete filter membrane package is fixed by the rubber package 2. The filter membrane layer 6 includes at least one layer of filter membrane, and the filter membrane includes any one of a cellulose filter membrane, a polyethersulfone filter membrane, a polytetrafluoroethylene filter membrane and a polyvinylidene fluoride filter membrane.

[0033] like Figure 2 , Figure 3 As shown, the liquid inlet unit 3 includes a gasket 3a corresponding to the liquid outlet 5 of the filter membrane layer 6, and the gasket 3a is provided with a gasket liquid outlet 301 connected to the liquid outlet 5. The side of the filter membrane layer 6 close to the gasket 3a is the liquid inlet surface 6a, and the side of the filter membrane layer 6 close to the filter unit 7 is the liquid outlet surface 6b. The gasket 3a seals the outer periphery of the liquid outlet 5 of the liquid inlet surface of the filter membrane layer 6, and the sealing method includes extrusion sealing, or bonding sealing and welding sealing. When the filter membrane package is clamped by an external clamp during use, an open liquid inlet channel can be formed between the relative filter membrane layers 6 in the filter membrane package and between adjacent filter membrane packages. When the material enters from the liquid inlet 4, the material can flow quickly between the filter membrane layers 6, thereby improving the filtration efficiency of the filter membrane package. The gasket 3a is made of any one of PE, PA, rubber, PMMA and PP. The above materials can meet the chemical compatibility of the feed liquid, and the most suitable material can be selected in different usage scenarios.

[0034] The outer ring of the gasket 3a is circular, or, due to limitations such as production technology, the gasket 3a is approximately circular. The minimum width a between the outer edge of the gasket 3a and the edge of the gasket liquid outlet 301 is 2-9mm. When the minimum width a of the gasket 3a is less than 2mm, when the filter unit 7 and the filter membrane layer 6 are squeezed and sealed, the sealing effect of the gasket 3a is insufficient, and the material is easy to leak along the position where the width of the gasket 3a is too small; when the minimum width of the gasket 3a is greater than 9mm, the width of the gasket 3a is too large, blocking the flow of materials in adjacent through holes; when the minimum width of the gasket 3a is 2-9mm, the gasket 3a maintains its sealing effect on the filter membrane package, and at the same time, avoids blocking the flow of materials in adjacent through holes.

[0035] The thickness h of the gasket 3a is 0.1-0.8mm. When the thickness h of the gasket 3a is less than 0.1mm, the filter membrane layers 6 are attached to each other, so that the flow channel between the filter membrane layers 6 becomes narrower or even disappears, the filtration resistance of the filter membrane package increases, and the filtration efficiency of the filter membrane layer 6 decreases; when the thickness h of the gasket 3a is greater than 0.8mm, after the gasket 3a supports the adjacent filter membrane layers 6, a wider flow channel is formed between the filter membrane layers 6, and the filter membrane layers 6 are prone to collapse or even damage due to the impact of the material; when the thickness h of the gasket 3a is 0.1-0.8mm, there is a certain interval between the filter membrane layers 6, forming a flow channel for the material, and the gasket 3a can provide support for the filter membrane layer 6, while protecting the filter membrane layer 6 from damage.

[0036] The gasket 3a includes at least one sealing layer 31. In this embodiment, Figure 4 As shown, the gasket 3a includes two sealing layers 31, and a support layer 32 is provided between adjacent sealing layers 31. The support layer 32 can provide additional support effect for the sealing layers 31 on both sides, thereby improving the structural stability of the gasket 3a.

[0037] like Figure 5 As shown, the filter unit 7 is provided with a sealing member 8, which is arranged at the liquid inlet 4 and the reflux port 1. The sealing member 8 is annular or substantially annular and is used to seal the corresponding liquid inlet 4 and the reflux port 1. Figure 6As shown, there is an overlapping area 9 between the gasket 3a and at least one of the seals 8 on one side in the projection in the thickness direction of the filter membrane package. The overlapping area 9 indicates that there is a certain contact area between the gasket 3a and the seal 8. The overlapping area 9 between the gasket 3a and one of the seals 8 on one side occupies 5-30% of the total area of ​​the gasket 3a. When the area of ​​the overlapping region 9 accounts for less than 5%, the contact area between the gasket 3a and the seal 8 is too small, resulting in insufficient extrusion effect between the gasket 3a and the seal 8, and the material is easy to flow along the gap or overlapping region 9 between the gasket 3a and the seal 8, causing the filter membrane package to lose its filtering effect; when the area of ​​the overlapping region 9 accounts for more than 30%, the thickness between the overlapping region 9 between the gasket 3a and the seal 8 increases, while the thickness of the non-overlapping region 9 is relatively small. During the use of the filter membrane package, there is a risk of leakage in the non-overlapping regions 9 on both sides, and the material is easy to flow along the non-overlapping regions 9. In addition, the filter membrane layer 6 at the junction of the overlapping region 9 and the non-overlapping region 9 is also prone to damage due to the sudden change in thickness; when the area of ​​the overlapping region 9 accounts for 5-30%, the sealing of the overlapping region 9 is improved, and the thickness difference between the gasket 3a and the seal 8 and the overlapping region 9 of the non-overlapping regions 9 on both sides is not large, which can avoid damage to the filter membrane layer 6.

[0038] Example 2

[0039] The difference between Example 2 and Example 1 is that Figure 7 As shown, the gaskets 3a on the same side of the liquid inlet unit 3 are connected by a connecting strip 3b, and the connecting strip 3b corresponds to the outer side of the liquid inlet unit 3. Therefore, the gaskets 3a on the same side of the liquid inlet unit 3 are connected to each other to form a whole. The gaskets 3a on the same side are positioned in an integrated manner by the connecting strip 3b, thereby improving the positioning accuracy between the gasket 3a and the filter membrane layer 6 and the filter unit 7.

[0040] Example 3

[0041] The difference between Example 3 and Example 1 is that Figure 8 As shown, the liquid inlet unit 3 is provided with a connecting ring 3c at a corresponding position of the peripheral area of ​​the filter membrane layer 6, and the connecting ring 3c is integrally formed with the gasket ring 3a. The connecting ring 3c is arranged at the periphery of the filter membrane layer 6, and the overall annular structure of the connecting ring 3c further improves the sealing performance of the peripheral area of ​​the filter membrane layer 6. At the same time, the connecting ring 3c connects the gasket rings 3a on both sides to prevent the filter membrane layer 6 where the gasket ring 3a is not provided in the filter membrane package from collapsing and being damaged, and plays a role in supporting and positioning the filter membrane layer 6.

[0042] Example 4

[0043] The difference between Example 4 and Example 2 is that Fig. 9As shown, support bars 3d are connected between the gasket rings 3a at both ends of the liquid inlet unit 3. The support bars 3d support the filter membrane layers 6 adjacent to the liquid inlet unit 3, preventing the filter membrane layers 6 from sticking to each other or between the filter membrane layers 6 and the external fixture, which is beneficial to ensure the effective filter area of ​​the filter membrane package.

[0044] The support bar 3d is connected to the gasket 3a by welding, bonding or integral molding. In this embodiment, the support bar 3d is made of a screen, the mesh diameter of the screen is 0.2-0.5mm, and the opening rate is 24-36%. When the material flows along the support bar 3d and the interval between the support bar 3d, the support bar 3d can improve the fluidity of the material and avoid stratification of the material during the flow. At the same time, due to the larger opening design in the screen structure, the support bar 3d will not affect the flow of the material, nor will it directly participate in the filtration of the material, thereby avoiding the influence of the filtration efficiency and filtration stability due to the design of the support bar 3d.

[0045] Example 5

[0046] The difference between Example 5 and Example 4 is that Fig.10 As shown, the liquid inlet unit 3 is provided with a connecting ring 3c at a corresponding position of the peripheral area of ​​the filter membrane layer 6, and the connecting ring 3c is integrally formed with the gasket ring 3a. The connecting ring 3c is arranged at the periphery of the filter membrane layer 6, and the overall annular structure of the connecting ring 3c further improves the sealing performance of the peripheral area of ​​the filter membrane layer 6. At the same time, the connecting ring 3c connects the gasket rings 3a on both sides to prevent the filter membrane layer 6 where the gasket ring 3a is not provided in the filter membrane package from collapsing and being damaged, and plays a role in supporting and positioning the filter membrane layer 6.

[0047] 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 filter membrane package with an open flow channel, comprising a liquid inlet unit (3), a filter membrane layer (6), a filter unit (7) and a rubber package (2) located on the outside, characterized in that: The filtration unit (7) and the filtration membrane layer (6) are provided with a liquid inlet (4), a liquid outlet (5) and a reflux port (1) for material flow; the liquid inlet unit (3) comprises a gasket (3a) corresponding to the liquid outlet (5) of the filtration membrane layer (6); the gasket (3a) is provided with a gasket liquid outlet (301) connected to the liquid outlet (5); the gasket (3a) seals the outer periphery of the liquid outlet (5) at the liquid inlet surface of the filtration membrane layer (6); the gasket (3a) comprises at least one sealing layer (31); when the gasket (3a) comprises two or more sealing layers (31), a support layer (32) is provided between adjacent sealing layers (31).

2. The filter membrane package with an open flow channel according to claim 1, characterized in that: The filter unit (7) is provided with a sealing member (8) for sealing the corresponding liquid inlet (4) and the reflux port (1), and an overlapping area (9) exists between the gasket (3a) and at least one side of the sealing member (8) in the projection in the thickness direction of the filter membrane package.

3. The filter membrane package with an open flow channel according to claim 2, characterized in that: The overlapping area (9) between the gasket (3a) and one of the side seals (8) occupies 5-30% of the total area of ​​the gasket (3a).

4. The filter membrane package with an open flow channel according to claim 1, characterized in that: The minimum width between the outer edge of the gasket ring (3a) and the edge of the gasket ring liquid outlet (301) is 2-9 mm.

5. The filter membrane package with an open flow channel according to claim 1, characterized in that: The gasket rings (3a) on the same side of the liquid inlet unit (3) are connected to each other to form a whole.

6. The filter membrane package with an open flow channel according to claim 1, characterized in that: The thickness of the gasket ring (3a) is 0.1-0.8 mm.

7. The filter membrane package with an open flow channel according to claim 1, characterized in that: Support bars (3d) are connected between the gaskets (3a) at both ends of the liquid inlet unit (3).

8. The filter membrane package with an open flow channel according to claim 7, characterized in that: The support bar (3d) and the gasket ring (3a) are connected by welding, bonding or integral molding.

9. The filter membrane package with an open flow channel according to claim 7 or 8, characterized in that: The support bar (3d) is a screen, the mesh diameter of the screen is 0.2-0.5 mm, and the opening rate is 24-36%.

10. The filter membrane package with an open flow channel according to claim 1, characterized in that: The liquid inlet unit (3) is provided with a connecting ring (3c) at a corresponding position of the peripheral area of ​​the filter membrane layer (6), and the connecting ring (3c) and the gasket ring (3a) are integrally formed.

11. The filter membrane package with an open flow channel according to claim 1, characterized in that: The gasket (3a) is made of any one of PE, PA, rubber, PMMA and PP.

Images