High-sealing-performance deep-layer filtering unit and deep-layer filtering assembly

Abstract

The utility model discloses a deep layer filter unit and deep layer filter component with high leakproofness, comprising a deep layer filter medium and a frame arranged around the periphery of the deep layer filter medium, the frame is provided with a frame liquid inlet, a frame liquid outlet and a frame exhaust port, one side of the deep filtering medium is a liquid inlet side communicated with the frame liquid inlet and the frame exhaust port, the other side of the deep filtering medium is a liquid outlet side communicated with the frame liquid outlet, the sealing ring is arranged on the outer edge of the deep filtering medium, a mounting groove for clamping the outer edge of the deep filtering medium is formed in the inner circumference of the frame, and the sealing ring is arranged in the mounting groove. And at least one part of the sealing ring is arranged in the mounting groove. The utility model aims to reduce the leakage risk between the deep filtering medium and the frame and effectively improve the sealing effect of the deep filtering unit.

Description

Technical Field

[0001] The utility model belongs to the technical field of deep filtration, and in particular relates to a high-sealability deep filtration unit and a filtration component. Background Art

[0002] In the food industry and biopharmaceutical industry, in order to meet the industry's higher purity requirements and hygiene standards, it is necessary to remove small particle contaminants from the feed liquid. Unlike surface filtration (particles stay on the surface of the filter medium), deep filtration allows the fluid to penetrate deeper and use the entire thickness of the medium to increase the interception effect. This mechanism enables deep filter paperboard to effectively remove very small particles while maintaining a relatively high flow rate. Therefore, as a filter component that relies on internal deep filter media to filter materials, the deep filter component can be used for clarification of cell fluids and pre-filtration and impurity removal in virus removal filtration. Common deep filter media are generally composed of cellulose, filter aids and adhesives. Cellulose fiber is used as a base material to provide the basic structure and mechanical strength of the paperboard; common filter aids include diatomaceous earth and perlite. These natural mineral materials are added to the paperboard to enhance its filtration capacity and adsorption performance, especially the interception of fine particles; adhesives are used to increase the structural stability of the filter medium.

[0003] In the deep filter assembly in the prior art, the outer periphery of the deep filter medium forms a seal by cooperating with the mounting groove of the frame. However, since the material of the deep filter medium itself has the property of being compressed and the frame is made of a relatively hard plastic, during the use of the filter unit, the deep filter medium will undergo a certain degree of deformation due to the scouring of the material, causing the deep filter medium in the mounting groove to become loose, ultimately affecting the sealing effect of the deep filter assembly. Utility Model Content

[0004] The utility model provides a high-sealability deep filter unit and a deep filter assembly, which reduce the risk of leakage between the deep filter medium and the frame and effectively improve the sealing effect of the deep filter unit.

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

[0006] A high-sealability deep filter unit comprises a deep filter medium and a frame arranged around the outer periphery of the deep filter medium, wherein the frame is provided with a frame liquid inlet, a frame liquid outlet and a frame exhaust port, one side of the deep filter medium is a liquid inlet side connected to the frame liquid inlet and the frame exhaust port, and the other side of the deep filter medium is a liquid outlet side connected to the frame liquid outlet, and further comprises a sealing ring arranged at the outer edge of the deep filter medium, the inner periphery of the frame is provided with an installation groove for clamping the outer edge of the deep filter medium, and at least a part of the sealing ring is arranged in the installation groove. Compared with the deep filter medium, the sealing ring has an impermeable characteristic, which can effectively improve the sealing performance between the deep filter medium and the frame, and the sealing ring has a certain deformability, which can adapt to the deformation of the deep filter medium to ensure the fixing effect between the deep filter medium and the installation groove. By arranging a sealing ring in the installation groove, the sealing effect of the deep filter unit can be effectively improved.

[0007] Preferably, the deep filter medium comprises at least one layer of deep filter paperboard, and a sealing ring is provided between the deep filter paperboard and at least one side wall of the installation groove and / or between adjacent deep filter paperboards. The sealing ring can improve the sealing effect and support strength of the deep filter medium at the liquid inlet side and / or the liquid outlet side, or the sealing ring can provide support and sealing effect between the layers of the deep filter paperboard, and at the same time adapt to the deformation between the layers of the deep filter paperboard to prevent the layers of the deep filter paperboard from loosening.

[0008] Preferably, the downstream side of the deep filter medium further comprises a retention layer, and the edge of the retention layer is arranged in the installation groove.

[0009] Preferably, the thickness of the sealing ring is 0.6-2 mm. The sealing ring with appropriate thickness can effectively solve the deformation difference of the deep filter medium and provide good supporting performance, thereby ensuring the sealing of the deep filter medium.

[0010] Preferably, the sealing ring includes an extrusion area located in the mounting groove and a support area protruding from the frame, and the width of the extrusion area is 10-50% of the overall width of the sealing ring. The extrusion area and the frame are arranged to overlap, and the sealing ring is fixed by the extrusion area, while improving the sealing of the sealing ring to the peripheral area of ​​the deep filter medium. The extrusion area accounts for an appropriate proportion of the entire sealing ring, which effectively avoids warping of the support area and ensures that the sealing ring is fully fixed.

[0011] Preferably, the width of the extrusion area is 1-10 mm; and / or the width of the support area is 2-10 mm. The appropriate width of the extrusion area ensures sufficient connection between the frame and the extrusion area, while ensuring the effective filtration area of ​​the deep filter medium as much as possible; the appropriate width of the support area fully supports the deep filter medium, while being conducive to controlling the warping amount of the support area and ensuring the integrity of the deep filter medium.

[0012] Preferably, the sealing ring is a thermoplastic elastomer, and the hardness of the sealing ring is 50-90D.

[0013] Preferably, the interception layer includes a filter membrane and / or non-woven fabric. The filter membrane and non-woven fabric have a small pore size, which can effectively intercept fibers and finer particles that may fall off the deep filter medium, ensure the cleanliness of the final filtrate, and improve the safety and reliability of the filtration process while ensuring the filtration efficiency.

[0014] Preferably, a support layer is provided on the upstream side and / or downstream side of the deep filter medium, the sealing ring is located on the outside or inside of the support layer, and the edge of the support layer is arranged in the mounting groove. The support layer can protect the deep filter medium and the retention layer, and prevent the deep filter medium from becoming loose and damaged as the filtration proceeds.

[0015] Preferably, the support layer is a screen with an opening rate greater than 20%. A support layer with a larger opening rate can reduce the impact on the filtering performance of the deep filter medium.

[0016] Preferably, a plurality of support parts are provided inside the frame, and the support parts are at least provided on the liquid outlet side. The support parts can further improve the stability of the connection between the deep filter medium and the frame.

[0017] A deep filter assembly comprises two end plates and at least one deep filter unit located between the two end plates, wherein the deep filter units are stacked between the two end plates, and the end plates are provided with an end plate liquid inlet, an end plate liquid outlet and an end plate exhaust port which are correspondingly connected to a frame liquid inlet, a frame liquid outlet and a frame exhaust port.

[0018] Preferably, the liquid inlet sides of the deep filtration units are arranged opposite to each other, and the liquid outlet sides of the deep filtration units are arranged opposite to each other.

[0019] The beneficial effects of the utility model are as follows: (1) the sealing ring has the property of being impermeable relative to the deep filter medium, thereby reducing the risk of leakage between the deep filter medium and the frame and improving the sealing effect of the deep filter unit; (2) the sealing ring has a certain deformability and can fully adapt to the deformation of the deep filter medium to prevent it from loosening; (3) the sealing ring has a certain supporting strength and deformation ability, thereby alleviating the tearing between the deep filter paperboard and the hard frame and improving the structural strength and sealing effect; (4) the sealing ring includes an extrusion area overlapping with the frame and a supporting area protruding from the frame, thereby improving the stability between the deep filter medium and the frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1This is a structural schematic diagram of Embodiment 1 of the present utility model;

[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0022] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0023] Figure 4 It is a partial enlarged view of the support part of the utility model;

[0024] Figure 5 It is a structural schematic diagram of Embodiment 2 of the present utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the liquid inlet side of Embodiment 3 of the present utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the liquid outlet side of Example 3 of the utility model;

[0027] Figure 8 It is a schematic diagram of the structural decomposition of Embodiment 3 of the present utility model;

[0028] Fig. 9 This is a structural diagram of embodiment 4 of the utility model

[0029] Fig.10 It is a schematic diagram of the structural decomposition of Embodiment 4 of the present utility model;

[0030] Fig.11 It is a structural schematic diagram of embodiment 5 of the present utility model.

[0031] In the figure: deep filter unit 1, frame 10, frame liquid inlet 11, frame exhaust port 12, frame liquid outlet 13, support portion 14, mounting groove 1a, sealing ring 2, extrusion area 2a, support area 2b, deep filter medium 3, deep filter paperboard 3a, retention layer 3b, liquid inlet side 301, liquid outlet side 302, support layer 4, end plate 5, end plate liquid inlet 51, end plate exhaust port 52, end plate liquid outlet 53. DETAILED DESCRIPTION

[0032] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0033] Example 1

[0034] like Figure 1In the illustrated embodiment, a high-sealability deep filter unit includes a deep filter medium 3 and a frame 10 arranged around the outer periphery of the deep filter medium 3. One side of the deep filter medium 3 is a liquid inlet side 301, and the other side is a liquid outlet side 302, wherein the frame 10 is provided with a frame liquid inlet 11 and a frame exhaust port 12 connected to the liquid inlet side 301, so as to facilitate the liquid inlet and reflux exhaust. When the liquid enters from the frame liquid inlet 11 of the liquid inlet side 301, it is filtered by the deep filter medium 3 to form a permeate, and the frame 10 is provided with a frame liquid outlet 13 connected to the liquid outlet side 302, so as to discharge the permeate.

[0035] A sealing ring 2 is also provided on the outer edge of the deep filter medium 3. The sealing ring 2 is a thermoplastic elastomer with a hardness of 50-90D. Figure 2 , Figure 3 As shown, the inner periphery of the frame 10 is provided with a mounting groove 1a for clamping the outer edge of the deep filter medium 3, and the deep filter medium 3 and the frame 10 are fixedly connected, and the fixed connection is any one of hot melt welding and ultrasonic welding. In this embodiment, a sealing ring 2 is provided between the deep filter medium 3 and the side wall of the mounting groove 1a facing the liquid outlet surface of the deep filter medium 3, and the sealing ring 2 seals the edge of the liquid outlet surface of the deep filter medium 3.

[0036] At least a portion of the sealing ring 2 is disposed in the mounting groove 1a. Figure 3 As shown, the sealing ring 2 includes a squeezing area 2a located in the mounting groove 1a and a supporting area 2b protruding from the frame 10. The deep filter medium 3 includes two layers of deep filter paperboard 3a. The deep filter paperboard 3a in the prior art is usually made of cellulose. Since cellulose fibers undergo a swelling process, that is, after absorbing water or other solvents, the volume of cellulose fibers increases but the chemical structure does not change, this process is due to the large number of hydroxyl groups (-OH) in the cellulose molecules forming hydrogen bonds with water molecules, causing the amorphous region in the fiber structure to absorb water and swell. Cellulose itself is not soluble in water, but the hydrogen bonds between its macromolecular chains can be broken by the intervention of water molecules, thereby expanding the fiber volume, which will cause the thickness of the deep filter paperboard 3a inside the mounting groove 1a and its adjacent paperboard outside to change suddenly during use, and the deep filter paperboard 3a here is close to the frame 10, and the pulling force it is subjected to is relatively large, so that the deep filter medium 3 at this location is very easy to break, which in turn causes leakage, thereby reducing the filtering effect of the deep filter unit 1. In the present application, the sealing ring 2 of the extrusion area 2a is arranged inside the mounting groove 1a, which can be used to improve the sealing performance of the deep filtration unit 1. At the same time, the stability of the deep filter paperboard 3a can be improved by setting the supporting area 2b of the protruding frame 10 by the sealing ring 2. The use of a sealing ring 2 with a certain supporting strength and deformation ability can be used to alleviate the tearing between the deep filter paperboard 3a and the hard frame 10, thereby improving the structural strength and sealing effect.

[0037] The width of the extrusion zone 2 a is 10-50% of the overall width of the sealing ring 2 . When the width of the extrusion zone 2a is less than 10% of the overall width of the sealing ring 2, the proportion of the extrusion zone 2a to the entire sealing ring 2 is small, and the support zone 2b is prone to warping and deformation, causing damage to the deep filter medium 3 of the adjacent filter unit when combined into a deep filter assembly, or causing damage to the deep filter medium 3 due to extrusion between the end plate. At the same time, the width of the extrusion zone 2a is insufficient, and the sealing ring 2 is prone to loosening, causing the deep filter medium 3 to fall off or the retention layer 3b to be misplaced, affecting the filtration stability; when the width of the extrusion zone 2a is greater than 50% of the overall width of the sealing ring 2, although the sealing ring 2 is fully fixed, the width of the support zone 2b is insufficient, resulting in the inner edge of the sealing ring 2 close to the center of the deep filter medium 3 at a faster filtration flow rate. The deep filter medium 3 is easily damaged. Although the proportion of the support zone 2b can be increased by increasing the overall width of the sealing ring 2, the sealing ring 2 with an excessively large width reduces the effective filtration area of ​​the deep filtration assembly. At the same time, an excessively long support zone 2b will also affect the filtration stability of the deep filtration assembly.

[0038] The thickness of the sealing ring 2 is 0.6-2mm. The sealing ring 2 of appropriate thickness can effectively solve the difference in deformation amount and support performance of the deep filter medium 3, thereby ensuring the sealing of the deep filter medium 3. When the thickness of the sealing ring 2 is less than 0.6mm, the thickness of the sealing ring 2 is insufficient, and the correction of the deformation amount of the deep filter medium 3 is insufficient. When the sealing ring 2 protrudes from the frame 10, the support capacity of the deep filter medium 3 is also weak, resulting in insufficient sealing at the edge of the deep filter medium 3; when the thickness of the sealing ring 2 is greater than 2mm, especially when there are multiple sealing rings 2, the overall thickness of the deep filter unit 1 will increase significantly, which will affect the number of deep filter units 1 in the deep filter assembly, and further affect the filtration efficiency.

[0039] like Figure 4 As shown, the width c of the squeeze zone 2a is 1-10mm. The squeeze zone 2a and the frame 10 are overlapped, and the seal ring 2 is fixed by the squeeze zone 2a, while the seal of the seal ring 2 to the peripheral area of ​​the deep filter medium 3 is improved. When the width of the squeeze zone 2a is less than 1mm, the connection between the frame 10 and the squeeze zone 2a is insufficient, and the high filtration flow rate easily causes the connection between the seal ring 2 and the frame 10 to loosen and fall off, causing the deep filter medium 3 to fall off due to the falling of the seal ring 2; when the width of the squeeze zone 2a is greater than 10mm, the squeeze zone 2a is too large, causing the width of the frame 10 to be larger, resulting in a reduction in the effective filtration area of ​​the deep filter medium 3.

[0040] The width b of the support area 2b is 2-10mm. When the width of the support area 2b is less than 2mm, the support area 2b cannot fully support the deep filter medium 3, and the inner edge of the support area 2b near the center of the filter unit is prone to damage the deep filter medium 3, affecting the filtering performance of the deep filter unit 1; when the width of the support area 2b is greater than 10mm, when the filter unit is formed, the support area 2b that is not pressed is prone to warping due to the pressing of the extrusion area 2a by the frame 10, and the warping amount of the support area 2b with too large width is large, affecting the adjacent deep filter unit 1 or causing damage to the deep filter medium 3 of the deep filter unit 1 under the extrusion of the end plate.

[0041] like Figure 4 As shown, a plurality of support portions 14 are provided inside the frame 10 of the deep filter unit 1, and the support portion 14 is provided at least on the liquid outlet side 302. The support portion 14 is used to improve the stability of the connection between the deep filter medium 3 and the frame 10. In this embodiment, the support portion 14 is provided on both the liquid outlet side 302 and the liquid inlet side 301 of the deep filter medium 3, thereby improving the supporting and stabilizing effect of the connection between the deep filter medium 3 and the frame 10 as much as possible.

[0042] Example 2

[0043] The difference between Example 2 and Example 1 is that Figure 5 As shown, a support layer 4 is provided on the downstream side of the deep filter medium 3, and the sealing ring 2 is located outside the support layer 4, so that the support layer 4 is located between the deep filter medium 3 and the sealing ring 2, and the edge of the support layer 4 is arranged in the mounting groove 1a, and the support layer 4 adopts a screen with an opening rate greater than 20%. The support layer 4 with a larger opening rate can minimize the impact on the filtering performance of the deep filter unit 1, and at the same time has a good protective effect on the deep filter medium 3, preventing the deep filter medium 3 from becoming loose and damaged as the filtering proceeds.

[0044] Example 3

[0045] The difference between Example 3 and Example 2 is that Figure 6 , Figure 7 and Figure 8As shown, the downstream side of the deep filter medium 3 also includes a retention layer 3b, the edge of which is arranged in the mounting groove 1a, and the retention layer 3b is located between the downstream side of the deep filter medium 3 and the sealing ring 2. At the same time, a support layer 4 is arranged on the outside of the sealing ring 2, and the support layer 4 is made of a screen with an opening rate greater than 20%. The retention layer 3b can be made of materials such as filter membranes and non-woven fabrics. Although the deep filter paperboard 3a is designed to capture larger particles and microorganisms, during the filtration process, especially when used for a long time or when handling high-load fluids, the fibers in the paperboard may sometimes fall off. If these fallen fibers are not captured, they may enter the downstream process and affect the quality of the final product, especially for the fields of medicine, food or precision electronic chemicals that require extremely high purity. By arranging the retention layer 3b on the upstream and downstream sides of the deep filter paperboard 3a, the fibers or tiny particles that may fall off are further removed to ensure the purity of the final product.

[0046] Example 4

[0047] A depth filter assembly, such as Fig. 9 , Fig.10 As shown, it includes two end plates 5 and a deep filter unit 1 located between the two end plates 5, and the end plate 5 is provided with an end plate liquid inlet 51, an end plate liquid outlet 53 and an end plate exhaust port 52 correspondingly connected with the frame liquid inlet 11, the frame liquid outlet 13 and the frame exhaust port 12. A liquid inlet channel is formed between the frame liquid inlet 11 and the end plate liquid inlet 51, and a liquid outlet channel is formed between the frame liquid outlet 13 and the end plate liquid outlet 53. The end plate 5 is provided with a protrusion corresponding to the frame 10 of the deep filter unit 1 for welding to form a deep filter assembly.

[0048] During actual filtration, the feed liquid flows in through the end plate liquid inlet 51, enters the liquid inlet surface of the deep filter medium 3 through the liquid inlet channel, flows out from the liquid outlet surface after being filtered by the deep filter medium 3, and is discharged from the end plate liquid outlet 53 after passing through the liquid outlet channel.

[0049] Example 5

[0050] The difference between Example 5 and Example 4 is that Fig.11As shown, a plurality of deep filter units 1 are arranged between the two end plates 5, and the deep filter units 1 are stacked and arranged between the two end plates 5. The end plates 5 and the deep filter units 1 and the deep filter units 1 are fixed by welding, so as to form a deep filter assembly. The liquid inlet sides 301 of the deep filter units 1 are arranged relative to each other, and the liquid outlet sides 302 of the deep filter units 1 are arranged relative to each other, so that the end plate liquid inlet 51 and the frame liquid inlet 11 of the deep filter unit 1 between the two end plates 5 form a liquid inlet channel, and the end plate liquid outlet 53 and the frame liquid outlet 13 of the deep filter unit 1 between the two end plates form a liquid outlet channel. During actual filtration, the feed liquid flows in through the end plate liquid inlet 51, enters the liquid inlet surface of the deep filter medium 3 of each deep filter unit 1 through the liquid inlet channel, flows out from the liquid outlet surface after being filtered by the deep filter medium 3, and is discharged from the end plate liquid outlet 53 after passing through the liquid outlet channel.

[0051] 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-sealability deep filter unit, comprising a deep filter medium (3) and a frame (10) arranged around the outer periphery of the deep filter medium (3), the frame (10) being provided with a frame liquid inlet (11), a frame liquid outlet (13) and a frame air outlet (12), one side of the deep filter medium (3) being provided as a liquid inlet side (301) communicating with the frame liquid inlet (11) and the frame air outlet (12), and the other side of the deep filter medium (3) being provided as a liquid outlet side (302) communicating with the frame liquid outlet (13), wherein: It also includes a sealing ring (2) arranged on the outer edge of the deep filter medium (3); the inner periphery of the frame (10) is provided with a mounting groove (1a) for clamping the outer edge of the deep filter medium (3); at least a portion of the sealing ring (2) is arranged in the mounting groove (1a).

2. A high-sealing deep filter unit according to claim 1, characterized in that: The deep filter medium (3) comprises at least one layer of deep filter paperboard (3a), and a sealing ring (2) is provided between the deep filter paperboard (3a) and at least one side wall of the installation groove (1a) and / or between adjacent deep filter paperboards (3a).

3. A high-sealing deep filter unit according to claim 1, characterized in that: The downstream side of the deep filter medium (3) further comprises a retention layer (3b), and the edge of the retention layer (3b) is arranged in the installation groove (1a).

4. A high-sealing deep filter unit according to claim 1, characterized in that: The thickness of the sealing ring (2) is 0.6-2 mm.

5. A high-sealing deep filter unit according to claim 1, characterized in that: The sealing ring (2) comprises an extrusion area (2a) located in the installation groove (1a) and a support area (2b) protruding from the frame (10); the width of the extrusion area (2a) is 10-50% of the overall width of the sealing ring (2).

6. A high-sealing deep filter unit according to claim 5, characterized in that: The width of the extrusion zone (2a) is 1-10 mm; and / or the width of the support zone (2b) is 2-10 mm.

7. A high-sealing depth filter unit according to claim 1, characterized in that: The sealing ring (2) is a thermoplastic elastomer, and the hardness of the sealing ring (2) is 50-90D.

8. A high-sealing deep filter unit according to claim 3, characterized in that: The retention layer (3b) comprises a filter membrane and / or a nonwoven fabric.

9. A high-sealing deep filter unit according to claim 1, characterized in that: A support layer (4) is provided on the upstream side and / or downstream side of the deep filter medium (3), the sealing ring (2) is located on the outside or inside of the support layer (4), and the edge of the support layer (4) is arranged in the installation groove (1a).

10. A high-sealing depth filter unit according to claim 9, characterized in that: The support layer (4) is a screen with an opening rate greater than 20%.

11. A high-sealing deep filter unit according to claim 1, characterized in that: A plurality of support portions (14) are provided on the inner side of the frame (10), and the support portions (14) are at least arranged on the liquid outlet side (302).

12. A deep filter assembly comprising two end plates (5) and at least one deep filter unit (1) according to any one of claims 1 to 11 located between the two end plates (5), characterized in that: The deep filter unit (1) is stacked between two end plates (5), and the end plates (5) are provided with an end plate liquid inlet (51), an end plate liquid outlet (53) and an end plate air outlet (52) which are connected to the frame liquid inlet, the frame liquid outlet (13) and the frame air outlet (12) respectively.

13. A deep filter assembly according to claim 12, characterized in that: The liquid inlet sides (301) of the deep filtration units (1) are arranged relative to each other, and the liquid outlet sides (302) of the deep filtration units (1) are arranged relative to each other.

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