Membrane package clamp and filtering device comprising membrane package clamp

Abstract

The utility model provides a membrane package clamp and a filtering device comprising the membrane package clamp, and relates to the field of filtering devices.The membrane package clamp is used for clamping a membrane package, and the membrane package comprises a liquid inlet unit at least comprising a layer of liquid inlet screen; the filtrate unit at least comprises a filtrate screen and a filter layer, the membrane package clamp comprises a runner plate and a clamping plate, and the runner plate and the clamping plate are used for clamping a membrane package; the runner plate comprises a clamping surface, a circulating groove communicated with the second through hole and a second clamp through hole are formed in the clamping surface, and the second clamp through hole is communicated with the first through hole; a supporting part and a liquid inlet area which is at least partially overlapped with the projection of the first through hole or the second through hole on the circulating groove are arranged in the circulating groove, and the supporting part comprises a supporting surface; the inner wall of the circulation groove is provided with a third clamp through hole communicated with fluid in the liquid inlet area, at the moment, the supporting surface firmly abuts against the membrane bag part corresponding to the circulation groove, good supporting is formed, it is guaranteed that the membrane bag has good integrity and effective filtering capacity in the whole filtering process, and it is guaranteed that the resistance of a flow channel in the membrane bag is not affected.

Description

Technical Field

[0001] The utility model relates to the field of filtering devices, in particular to a membrane package fixture and a filtering device containing the membrane package fixture. Background Art

[0002] In the process steps of biopharmaceuticals such as cell perfusion culture, concentration, and virus removal filtration, the membrane package is an important part of realizing these processes.

[0003] The membrane package is composed of an inlet liquid unit and a filtrate unit stacked alternately. The inlet liquid unit and the filtrate unit are respectively provided with a feed hole and a filtrate hole. Glue is injected around the feed hole of the filtrate unit to prevent the unfiltered liquid from entering the filtrate unit through the feed hole and contaminating the filtered liquid, and glue is injected around the filter hole of the inlet liquid unit to prevent the filtered liquid from entering the inlet liquid unit through the filter hole and being contaminated.

[0004] When the membrane package is in use and verification, a fixture is needed to fix and seal it. The membrane package fixtures in the prior art usually include a flow channel plate and a clamping plate. The membrane package is placed between the flow channel plate and the clamping plate for use. A flow channel and a fixture through hole are provided on the clamping surface of the flow channel plate to respectively receive the unfiltered liquid flowing out of the feed hole and the filtered liquid flowing out of the filtrate hole. During the whole use process, the membrane package is closely attached to the flow channel plate and the clamping plate to ensure that the liquid does not leak from the gap between the membrane package and the flow channel plate and the clamping plate. However, when using a filtering device composed of a membrane package and a membrane package fixture, when the membrane package is closely attached and sealed to the clamping surface, since the flow channel is recessed downward, the corresponding part of the membrane package will also deform under pressure and sink into the flow channel, causing the filter layer in the membrane package to be squeezed and sheared and damaged, resulting in filter failure; at the same time, the sunken membrane package will also fill the flow channel, causing poor fluid flow in the flow channel. In the case of serious deformation of the membrane package, it may even cause direct blockage of the flow channel, hindering the filtering process. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a membrane package fixture with good support for the membrane package and excellent sealing performance and a filtering device composed thereof.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] Provide a membrane package fixture for clamping a membrane package, the membrane package includes,

[0008] An inlet liquid unit, including at least one layer of inlet liquid screen;

[0009] A filtrate unit, including at least a filtrate screen and a filter layer, the filter layer is arranged on both sides of the filtrate screen;

[0010] The liquid inlet unit and the filtrate unit are alternately stacked along the thickness direction of the membrane package;

[0011] Both the liquid inlet unit and the filtrate unit have a first through-hole and a second through-hole;

[0012] The side of the filter layer close to the liquid inlet screen is the liquid inlet surface, and a first liquid flow channel is formed between the liquid inlet surfaces of adjacent filter layers, and the first liquid flow channel communicates with the first through-hole;

[0013] The side of the filter layer close to the filtrate screen is the liquid outlet surface, and a second liquid flow channel is formed between the liquid outlet surfaces of adjacent filter layers, and the second liquid flow channel communicates with the second through-hole;

[0014] The membrane package clamp includes: a flow channel plate and a clamping plate, and the flow channel plate and the clamping plate are used to clamp the membrane package;

[0015] The flow channel plate includes a clamping surface, and the clamping surface abuts against the membrane package;

[0016] The clamping surface is provided with a flow-through groove communicating with the first through-hole and a first clamp through-hole, and the first clamp through-hole communicates with the second through-hole;

[0017] Or the clamping surface is provided with a flow-through groove communicating with the second through-hole and a second clamp through-hole, and the second clamp through-hole communicates with the first through-hole;

[0018] The flow-through groove is provided with a support portion and a liquid inlet area at least partially overlapping with the projection of the first through-hole or the second through-hole on the flow-through groove. The support portion includes a support surface, and the support surface is used to support and abut against the membrane package;

[0019] A third clamp through-hole is opened on the inner wall of the flow-through groove, and the third clamp through-hole is in fluid communication with the liquid inlet area.

[0020] During the filtration verification or use process, the membrane package plays a filtering role. On the one hand, the membrane package fixture is used to clamp the membrane package. On the other hand, it can guide the flow of the feed liquid, enabling better distribution and collection of the feed liquid entering and leaving the membrane package. During the filtration process, the membrane packages can be used individually or stacked and clamped between the flow channel plate and the clamping plate. The flow-through groove can converge and guide the feed liquid, enabling the feed liquid entering and leaving the membrane package through the first through-hole and the second through-hole to be separated from each other on the flow channel plate, making it easier to collect them separately. Specifically, there are two design forms for the flow channel plate in the present utility model: 1. The flow-through groove on the clamping surface of the flow channel plate is communicated with the first through-hole of the membrane package, and the first fixture through-hole is communicated with the second through-hole. At this time, during use, the feed liquid flows into the flow-through groove from the third fixture through-hole and enters the first through-hole of the membrane package through the flow-through groove. After being filtered by the membrane package, the permeate flows out from the second through-hole of the membrane package and flows into the first fixture through-hole, and is collected after convergence; 2. The flow-through groove on the clamping surface of the flow channel plate is communicated with the second through-hole of the membrane package, and the second fixture through-hole is communicated with the first through-hole. At this time, during use, the feed liquid flows into the first through-hole of the membrane package from the second fixture through-hole of the flow channel plate. After being filtered by the membrane package, the permeate flows out from the second through-hole of the membrane package and flows into the flow-through groove, and flows out from the third fixture through-hole after convergence to complete the collection.

[0021] Meanwhile, the present utility model is provided with a support portion inside the flow-through groove. When the membrane package is clamped by the membrane package fixture, the surface of the membrane package will firmly abut against the clamping surface. At this time, the support surface of the support portion will also firmly abut against the part of the membrane package corresponding to the flow-through groove, forming a good support. In this way, it can prevent the membrane package from sinking into the flow-through groove under the action of the clamping force. At the same time, the degree of sinking of the part not supported by the support surface can also be effectively alleviated. On the one hand, it effectively reduces the possibility of damage to the filter layer caused by the sinking deformation of the membrane package, ensuring that the membrane package also has good integrity and effective filtering ability during the entire filtration process, and at the same time preventing the deformation of the membrane package in the thickness direction and ensuring that the flow resistance inside the membrane package is not affected; on the other hand, it can also reduce the filling of the flow-through groove space due to the sinking deformation of the membrane package, prevent the flow-through groove from being blocked during the filtration process, or the reduction of the flow path of the feed liquid in the flow-through groove, and avoid the increase of the flow resistance of the feed liquid in the flow-through groove. Moreover, the form of the support portion in the present utility model can be diverse. It can be in the form of a support plate or a support column. It can be continuously extended or segmented. No matter which form, the third fixture through-hole in the flow-through groove must be in fluid communication with the liquid inlet area to prevent the support portion from blocking the feed liquid in the flow-through groove.

[0022] Further, the distance from the support surface to the clamping surface in the direction of membrane package abutment is L, and the width of the flow-through groove is W, and L:W≤0.4.

[0023] In the present utility model, the distance between the support surface and the clamping surface in the direction of membrane package abutment is L, where L is the absolute value of the distance difference. That is, when the support surface protrudes from the clamping surface, L is the protruding distance, and when the support surface is recessed from the clamping surface, L is the recessed distance. In the present utility model, in order to ensure that the membrane package can closely adhere to the clamping surface, a relatively large extrusion sealing force is used. If L:W > 0.4, that is, the support surface protrudes from the clamping surface too much or is recessed from the clamping surface too much in the direction of membrane package abutment. When the protruding distance is too much, on the one hand, the protruding part of the support portion will be embedded into the membrane package, causing extrusion of the filter layer in the membrane package, damaging the membrane package, and resulting in filtration failure. On the other hand, it will cause the membrane package to not be able to closely fit on the clamping surface, resulting in a lack of sealing during the filtration process. When the recessed distance is too much, the membrane package can only be supported when it is recessed to a certain extent in the flow channel, and even the support portion cannot generate a supporting force on the membrane package in the corresponding area of the flow channel. At this time, the part of the membrane package embedded in the flow channel deforms too much, causing the filter layer to deform and break, resulting in filtration failure. In the above technical solution of the present utility model, L:W ≤ 0.4, which can not only ensure that the membrane package and the clamping surface can closely fit, so that there is no gap between the membrane package and the clamping surface of the membrane package fixture, and the feed liquid will not leak from the gap between the membrane package and the clamping surface, but also ensure that the support portion can have sufficient supporting force on the membrane package provided in the corresponding area of the flow channel. The membrane package does not have to be recessed to a certain extent in the flow channel to be supported by the support portion, and at the same time, the integrity of the filter layer is ensured, preventing it from being damaged by extrusion or excessive deformation.

[0024] Further, the area ratio of the flow channel to the support surface is 4 - 7:1.

[0025] When the area ratio of the flow channel to the support surface < 4, that is, the proportion of the support surface in the flow channel is too large, only a small amount of feed liquid can flow in the flow channel, which is likely to cause the feed liquid to accumulate and stagnate in the flow channel, resulting in an increase in the filtration resistance of the membrane package. When the area ratio of the flow channel to the support surface > 7, the area of the flow channel is too large, resulting in an increase in the projected area of the membrane package falling on the flow channel in the support direction, that is, the area of the membrane package sinking into the flow channel becomes larger. At the same time, the area of the support surface becomes smaller, and the supporting force on the membrane package sinking into the flow channel becomes smaller, unable to effectively support the membrane package. In the above technical solution, the area ratio of the flow channel to the support surface is 4 - 7:1, which can not only ensure that there is enough flow space in the flow channel to accommodate the feed liquid, but also ensure that there is enough supporting force to support the membrane package.

[0026] Further, the liquid inlet area overlaps with the projection of the first through hole or the second through hole of the membrane package on the flow channel, and the support portion includes at least a hole peripheral support section outside the liquid inlet area, and the hole peripheral support section is adjacent to or intersects with the projection of the liquid inlet area in the support direction.

[0027] The liquid inlet area in the present utility model refers to the part of the flow channel that overlaps with the projection of the first through hole or the second through hole on the membrane package. When the membrane package and the membrane package fixture are in abutting and sealing contact, the area around the first through hole or the second through hole that is not supported is more likely to deform under the influence of the extrusion sealing force, resulting in damage to the inner membrane formation in this area or affecting the sealing performance of the membrane package flow channel.

[0028] In the technical solution of the present utility model, a hole peripheral support section is provided, and the hole peripheral support section is connected or intersects with the projection in the support direction. Herein, connection means that the hole peripheral support section exactly fits the outer edge of the liquid inlet area, and there is no more hole peripheral support section extending into the liquid inlet area, while intersection means that the hole peripheral support section extends into the liquid inlet area; the setting of the hole peripheral support section can support the membrane package area around the first through hole or the second through hole, thereby preventing the deformation of the membrane package in this area. When the hole peripheral support section extends into the liquid inlet area, it can reserve a section that can still provide good support for the periphery of the hole even if a certain misalignment occurs when the membrane package and the fixture are clamped.

[0029] Further, the support part is a support plate, the support plate is arranged above the bottom surface of the flow channel groove, and both ends of the support plate extend parallel to both ends of the flow channel.

[0030] In the present utility model, the form of a continuously extending support plate is adopted as the support part. Compared with other forms, the form of the support plate can provide better support for the membrane package and is convenient for the preparation or processing of the mold; at the same time, in the present utility model, the support plate is continuously arranged and both ends extend parallel to both ends of the flow channel. This is because if it is arranged in segments, there will be many intervals between adjacent support parts. On the one hand, too many intervals may lead to a reduction in the support for the membrane package, and the segmented setting has more edge parts, and the edge parts will produce more extrusion deformation when the membrane package abuts; on the other hand, too many intervals will lead to a more complex flow path of the liquid in the flow channel and more dead corners for liquid residue, which is not conducive to the entire filtration process. By adopting the above technical solution, the support part is arranged at the bottom of the flow channel and is in the form of a support plate, and at the same time extends parallel to both ends of the flow channel, which can not only ensure the support force provided by the support part to the greatest extent, prevent excessive extrusion deformation of the support part on the membrane package during the support process, ensure the integrity of the membrane package, but also enable the liquid in the flow channel to flow more smoothly and reduce the possibility of generating dead corners, which is more conducive to filtration and cleaning.

[0031] Further, the support plate is arranged in the middle of the flow channel, and the third fixture through hole is arranged on both sides of the support plate.

[0032] The support plate is arranged in the middle of the flow channel. The support plate can better support the membrane package area corresponding to the flow channel. At this time, the depression depths of the membrane packages on both sides of the support plate are the same, the deformation of the membrane packages is more balanced, and the influence of the deformation on the membrane packages is smaller. At the same time, the third fixture through holes are arranged on both sides of the support plate, so that the liquid can flow smoothly on both sides of the support plate in the flow channel, and the influence of the support plate on the liquid flow is also smaller.

[0033] Further, the third fixture through holes are symmetrically arranged on both sides of the support plate, and the number of the third fixture through holes on one side of the support plate is more than two.

[0034] When the liquid flows into the flow channel, some substances in the liquid may adsorb into clusters and block the third fixture through holes. At least two third fixture through holes are arranged on one side of the support plate. When one third fixture through hole is blocked, at least one unblocked third fixture through hole is available for the liquid to flow through. Moreover, multiple settings can also increase the area of the third fixture through holes and have higher filtration efficiency. At the same time, the third fixture through holes are symmetrically arranged on both sides of the support plate, which can make the flow smoothness on both sides consistent and is convenient for collection.

[0035] Further, the bottom of the flow channel is a plane, and the edge of the flow channel is a fillet.

[0036] The bottom of the flow channel is set as a plane, and the shear rate of the liquid in the flow channel does not change, which is beneficial to maintaining the stability of the liquid. Moreover, the fillet at the edge of the flow channel can protect the membrane package from being cut by the edge of the flow channel when the membrane package and the membrane package fixture are in mutual contact and sealing, ensuring the integrity of the membrane package.

[0037] The present utility model further relates to a filtering device including the membrane package fixture in any of the above solutions. The filtering device further includes:

[0038] A membrane package, including,

[0039] A liquid inlet unit, including at least one layer of liquid inlet screen;

[0040] A filtrate unit, including at least a filtrate screen and a filtering layer, and the filtering layer is arranged on both sides of the filtrate screen;

[0041] The liquid inlet unit and the filtrate unit are alternately stacked along the thickness direction of the membrane package;

[0042] The liquid inlet unit and the filtrate unit both have a first through hole and a second through hole;

[0043] The side of the filtering layer close to the liquid inlet screen is the liquid inlet surface, and a first liquid flow channel is formed between the liquid inlet surfaces of adjacent filtering layers, and the first liquid flow channel communicates with the first through hole;

[0044] One side of the filter layer close to the filtrate screen is the liquid outlet surface, and a second liquid flow channel is formed between the liquid outlet surfaces of adjacent filter layers. The second liquid flow channel communicates with the second through hole.

[0045] Fasteners, and the fasteners are used to tightly seal the membrane package, the flow channel plate and the clamping plate.

[0046] A filtering device composed of a membrane package, a membrane package clamp and fasteners. The membrane package clamp is used to clamp the membrane package and cooperate with the liquid inlet unit and the filtrate unit of the membrane package to form an outflow channel and an inflow channel, which can play a role in guiding the flow of the feed liquid, so that the feed liquid flowing in and out of the membrane package can be better distributed and collected; the fasteners are used to firmly abut the membrane package and the membrane package clamp to ensure the sealing performance during the filtering process.

[0047] Furthermore, clamping surfaces are arranged on both sides of the flow channel plate, and the membrane package includes at least two groups, which are respectively clamped between the clamping surfaces on both sides of the flow channel plate and the clamping plate.

[0048] Clamping surfaces are respectively arranged on both sides of the flow channel plate. There are two groups of membrane packages. Each group is a single membrane package or multiple membrane packages are stacked. The two groups of membrane packages are respectively clamped between the clamping surfaces on both sides of the flow channel plate and the clamping plate. In this way, the membrane packages on both sides of the flow channel plate can be used in parallel, increasing the filtering efficiency of the filtering device.

[0049] In summary, the present utility model has at least the following beneficial effects:

[0050] A support part is arranged inside the flow groove. When the membrane package is clamped by the membrane package clamp, the surface of the membrane package will firmly abut against the clamping surface. At this time, the support surface of the support part will also firmly abut against the part of the membrane package corresponding to the flow groove, forming a good support. In this way, it can prevent the membrane package from sinking into the flow groove due to the clamping force. At the same time, for the part not supported by the support surface, the degree of sinking can also be effectively alleviated. On the one hand, it effectively reduces the possibility of damage to the filter layer caused by the sinking and deformation of the membrane package, ensures that the membrane package also has good integrity and effective filtering ability during the whole filtering process, and at the same time prevents the deformation of the membrane package in the thickness direction, ensuring that the flow resistance inside the membrane package is not affected; on the other hand, it can also reduce the filling of the flow groove space due to the sinking and deformation of the membrane package, prevent the flow groove from being blocked during the filtering process, or the reduction of the flow path of the liquid in the flow groove, and avoid the increase of the flow resistance of the liquid in the flow groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The following further illustrates the present utility model in conjunction with the drawings:

[0052] Figure 1 It is a schematic diagram of the membrane package clamp for Embodiment 1;

[0053] Figure 2 It is an exploded view of the membrane package;

[0054] Figure 3 Schematic diagram of the flow channel plate for Embodiment 1;

[0055] Figure 4 Partial schematic diagram of the A position of the flow channel plate for Embodiment 1;

[0056] Figure 5 Schematic diagram of the flow channel plate for Embodiment 2;

[0057] Figure 6 Schematic diagram of the filtering device.

[0058] 1. Flow channel plate; 11. Clamping surface; 13. Flow-through groove; 131. Support part; 1311. Support surface; 132. Liquid inlet area; 133. Third fixture through-hole; 14. Second fixture through-hole; 15. First fixture channel; 16. Second fixture channel; 18. First fixture through-hole; 2. Clamping plate; 3. Positioning connecting rod; 4. Stabilizing member; 5. Mounting frame; 6. Universal wheel; 7. Liquid receiving tray; 8. Membrane package; 81. Liquid inlet screen; 811. Filtrate unit; 82. Filtrate screen; 83. Filter layer; 84. First through-hole; 85. Second through-hole; 10. Fastener. Detailed implementation manners

[0059] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0060] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0061] Embodiment 1:

[0062] A membrane package fixture, as Figure 1 shown, includes a flow channel plate 1 and a clamping plate 2 for clamping the membrane package 8. Among them, as Figure 2As shown, the membrane package 8 includes a liquid inlet unit and a filtrate unit 811 alternately stacked in the thickness direction. The liquid inlet unit includes a layer of liquid inlet screen 81. The filtrate unit 811 includes a filtrate screen 82 and filter layers 83 provided on both sides of the filtrate screen 82. First through holes 84 and second through holes 85 are provided on both sides of the liquid inlet unit and the filtrate unit 811. Therefore, the structure of the membrane package 8 is that the liquid inlet screen 81 - filter layer 83 - filtrate screen 82 - filter layer 83 are cyclically arranged in the thickness direction. Among them, the side of the filter layer 83 close to the liquid inlet screen is the liquid inlet surface, and a first liquid flow channel is formed between the liquid inlet surfaces of adjacent filter layers 83. The first liquid flow channel communicates with the first through hole 84. The side of the filter layer 84 close to the filtrate screen is the liquid outlet surface, and a second liquid flow channel is formed between the liquid outlet surfaces of adjacent filter layers. The second liquid flow channel communicates with the second through hole 85. In this embodiment, the liquid inlet screen 81 serves to separate the liquid inlet surfaces of adjacent filter layers 83. Therefore, the liquid inlet screen 81 itself forms the first liquid flow channel. Similarly, the filtrate screen 82 itself forms the second liquid flow channel; during the membrane package filtration process, there are two forms: 1. Tangential flow form: The feed liquid flows in from the first through hole 84 on one side, and then enters the first liquid flow channel. Among them, the part of the feed liquid that permeates through the filter layer enters the second liquid flow channel and flows out from the second through holes 85 on both sides to form permeate, while the part that does not permeate through the filter layer flows out from the first through hole 84 on the other side to form reflux liquid; 2. Dead-end filtration form: The feed liquid flows in from the first through hole 84 on one side, and then enters the first liquid flow channel. The first through hole 84 on the other side is used to block the gas after the feed liquid enters, or the feed liquid enters from the first through holes 84 on both sides at the same time; during dead-end filtration, all the feed liquid permeates through the filter layer and enters the second liquid flow channel and flows out from the second through holes 85 on both sides to form permeate.

[0063] The flow channel plate 1 and the clamping plate 2 are connected by a positioning connecting rod 3. A fastener 10 is provided on the side of the clamping plate 2 away from the flow channel plate 1. The fastener 10 is installed on the positioning connecting rod 3. When installing the membrane package 8, the clamping plate 2 can slide and adjust the distance between it and the flow channel plate 1 on the connecting rod 3. After clamping a specific number of membrane packages 8, the three are tightened with the fastener 10 to complete the clamping and sealing of the membrane package; at the same time, the flow channel plate 1 is installed on the mounting frame 5 through a stabilizing member 4. During the use process and the disassembly and assembly process, the residual feed liquid can be collected in the liquid receiving tray 7 on the mounting frame 5. At the same time, for the convenience of moving the fixture, a universal wheel 6 is connected to the bottom of the mounting frame 5.

[0064] As Figure 3 、 Figure 4As shown in the figure, the flow channel plate 1 includes a clamping surface 11 that abuts against the membrane package 8. A flow channel 13 is formed on the clamping surface 11. Inside the flow channel 13, there are a support portion 131 and a liquid inlet area 132. The liquid inlet area 132 is the part of the flow channel 13 where the projection overlaps with the first through hole 84 or the second through hole 85 of the membrane package. A third fixture through hole 131 is also provided on the inner wall of the flow channel 13, and the third fixture through hole 131 is in fluid communication with the liquid inlet area 132.

[0065] The support portion 131 includes a support surface 1311. When the membrane package 8 is clamped by the membrane package 8 fixture, the surface of the membrane package 8 will firmly abut against the clamping surface 11. At this time, the support surface 1311 of the support portion 131 will also firmly abut against the corresponding part of the membrane package 8 in the flow channel 13, forming a good support. In this way, it can prevent the membrane package 8 from sinking into the flow channel under the action of the clamping force. At the same time, for the part not supported by the support surface 1311, the degree of sinking can also be effectively alleviated. On the one hand, it effectively reduces the possibility of the filter layer being damaged due to the deformation of the membrane package 8 sinking, ensuring that the membrane package 8 also has good integrity and effective filtering ability during the entire filtering process. At the same time, it also prevents the deformation of the membrane package 8 in the thickness direction, ensuring that the flow resistance inside the membrane package 8 is not affected. On the other hand, it can also reduce the filling of the space of the flow channel 13 due to the deformation of the membrane package 8 sinking, preventing the flow channel 13 from being blocked during the filtering process, or the reduction of the liquid flow path in the flow channel 13, and avoiding the increase of the liquid flow resistance in the flow channel 13.

[0066] At the same time, the area ratio of the flow channel 13 to the support surface 1311 is 4 - 7:1. In this embodiment, the area ratio is 5:1, which can not only ensure that there is enough flow space in the flow channel 13 to accommodate the liquid, but also ensure that there is enough supporting force to support the membrane package 8. And the distance from the support surface 1311 to the clamping surface 11 in the direction of the membrane package 8 abutment is L, where L is the absolute value of the distance difference. That is, when the support surface 1311 protrudes from the clamping surface 11, L is the protruding distance, and when the support surface 1311 is recessed from the clamping surface 11, L is the recessed distance. The width of the flow channel 13 is W, and L:W ≤ 0.4. In this embodiment, L:W = 0, which can not only ensure that the membrane package 8 and the clamping surface 11 can be closely attached, so that there is no gap between the membrane package 8 and the clamping surface 11 of the membrane package fixture, and the liquid will not leak from the gap between the membrane package and the clamping surface, but also ensure that the support portion 131 can have enough supporting force for the membrane package 8 arranged in the corresponding area of the flow channel 13. The membrane package 8 does not have to sink to a certain extent in the flow channel 13 before being supported by the support portion 131. At the same time, it also ensures the integrity of the filter layer and prevents it from being damaged due to extrusion or excessive deformation.

[0067] In this embodiment, the bottom of the flow channel 13 is a flat surface, and the edges of the flow channel 13 are rounded corners, so that the shear rate of the liquid material in the flow channel 13 remains unchanged, which is beneficial to maintaining the stability of the liquid material. Moreover, when the film package 8 and the film package fixture are in mutual abutting and sealing, the rounded corners of the edge of the flow channel 13 can protect the film package 8 from being cut by the edge of the flow channel 13, ensuring the integrity of the film package 8.

[0068] Meanwhile, the form of the support portion 131 can be diverse. In this embodiment, the support portion 131 is in the form of a support plate, and the support plate is arranged above the bottom surface of the flow channel 13, and both ends of the support plate extend parallel to both ends of the flow channel 13; in other embodiments, it can also be in the form of a support column, and can also be segmented; and adopting the form of a continuously extending support plate as the support portion 131, compared with other forms, the form of the support plate can provide better support for the film package, while facilitating the preparation or processing of the mold. At the same time, extending parallel to both ends of the flow channel 13 can not only ensure the support force provided by the support portion 131 to the greatest extent, prevent excessive extrusion deformation of the film package by the support portion 131 during the support process, ensure the integrity of the film package, but also enable the liquid material in the flow channel 13 to flow more smoothly, and reduce the possibility of residual dead corners, which is more conducive to filtration and cleaning. Moreover, the support plate is arranged in the middle of the flow channel 13, and the third fixture through holes 133 are symmetrically arranged on both sides of the support plate, and the number of the third fixture through holes 133 on one side of the support plate is more than two, which can not only better support the film package area corresponding to the flow channel 133, make the deformation of the film package more balanced and the influence on the film package smaller, but also enable the liquid material to flow smoothly on both sides of the support plate in the flow channel 13, and the influence of the support plate on the liquid material flow is also smaller.

[0069] The support portion 131 further includes at least a part of the hole peripheral support section outside the liquid inlet area 132, and the hole peripheral support section intersects with the projection of the liquid inlet area 132 in the support direction. In this embodiment, since the support portion 131 is in the form of a non-continuously extending support plate, the hole peripheral support section is the two ends of the support portion 131. The setting of the hole peripheral support section will support the film package area around the second through hole 85, thereby preventing the deformation of the film package in this area. When the hole peripheral support section extends into the liquid inlet area, a section can be reserved. When the film package and the fixture are clamped, even if a certain dislocation occurs, it can also provide good support for the periphery of the hole. In other embodiments, the hole peripheral support section is connected to the projection of the liquid inlet area 132 in the support direction.

[0070] Such as Figure 3As shown in the figure, the flow channel plate 1 is provided with a first fixture channel 15 and a second fixture channel 16, and a second fixture through hole is provided on the clamping surface. The first fixture channel 15 communicates with the second fixture through hole 14, and the second fixture channel 16 is in fluid communication with the third fixture through hole 133. The second through hole 85 communicates with the liquid inlet area on the flow through groove 13, and the second fixture 16 through hole communicates with the second through hole 85. At this time, during use, the liquid material flows in from the first fixture channel 15, and flows into the first through hole of the membrane package through the second fixture through hole. After being filtered by the membrane package 8, the permeate flows out from the second through hole of the membrane package 8, and flows into the flow through groove 13. After converging, it flows out from the third fixture through hole 133 into the second fixture channel 16, and then the collection is completed.

[0071] As Figure 6 shown, a filtering device includes a membrane package fixture and a membrane package 8 installed in the membrane package fixture. In this embodiment, clamping surfaces 11 are respectively arranged on both sides of the flow channel plate 1. Two groups of membrane packages are provided, and each group is a stack of multiple membrane packages 8. The two groups of membrane packages are respectively clamped between the clamping surfaces 11 on both sides of the flow channel plate 1 and the clamping plate 2. In this way, the membrane packages on both sides of the flow channel plate 1 can be used in parallel, increasing the filtering efficiency of the filtering device.

[0072] Embodiment 2:

[0073] As Figure 5 shown, the flow channel plate 1 is provided with a first fixture channel 15 and a second fixture channel 16, and a first fixture through hole is provided on the clamping surface. The first fixture channel 15 communicates with the first fixture through hole 18, and the second fixture channel 16 is in fluid communication with the third fixture through hole 133. The first through hole 84 communicates with the liquid inlet area on the flow through groove 13, and the first fixture through hole 18 communicates with the second through hole 85. At this time, during use, the liquid material flows in from the second fixture channel 16, and flows into the flow through groove 13 from the third fixture through hole 133, and enters the first through hole 84 of the membrane package 8 through the flow through groove 13. After being filtered by the membrane package, the permeate flows out from the second through hole 85 of the membrane package, and flows into the first fixture through hole. After converging to the first fixture channel 15, the collection is completed.

[0074] The preferred embodiments of the present invention have been described in detail above. However, it should be understood that after reading the above teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention. These equivalent forms also fall within the scope defined by the appended claims of the present invention.

Claims

1. A membrane package fixture for clamping a membrane package, the membrane package comprising: A liquid inlet unit including at least one layer of liquid inlet screen; A filtrate unit including at least a filtrate screen and a filtration layer, the filtration layer being disposed on both sides of the filtrate screen; The liquid inlet unit and the filtrate unit are alternately stacked along the thickness direction of the membrane package; Both the liquid inlet unit and the filtrate unit have a first through hole and a second through hole; One side of the filtration layer close to the liquid inlet screen is a liquid inlet surface, and a first liquid flow channel is formed between the liquid inlet surfaces of adjacent filtration layers, and the first liquid flow channel communicates with the first through hole; One side of the filtration layer close to the filtrate screen is an outlet liquid surface, and a second liquid flow channel is formed between the outlet liquid surfaces of adjacent filtration layers, and the second liquid flow channel communicates with the second through hole; The membrane package fixture includes: a flow channel plate and a clamping plate, the flow channel plate and the clamping plate being used for clamping the membrane package; The flow channel plate includes a clamping surface that abuts against the membrane package; The clamping surface is provided with a flow-through groove communicating with the first through hole and a first fixture through hole, and the first fixture through hole communicates with the second through hole; Or the clamping surface is provided with a flow-through groove communicating with the second through hole and a second fixture through hole, and the second fixture through hole communicates with the first through hole; It is characterized in that: A support portion and a liquid inlet area at least partially overlapping the projection of the first through hole or the second through hole on the flow-through groove are provided in the flow-through groove, the support portion includes a support surface, and the support surface is used for supporting and abutting against the membrane package; A third fixture through hole is provided on the inner wall of the flow-through groove, and the third fixture through hole is in fluid communication with the liquid inlet area.

2. The membrane package fixture according to claim 1, characterized in that, The distance from the support surface to the clamping surface in the direction of membrane package abutment is L, the width of the flow-through groove is W, and L:W≤0.

4.

3. The membrane package fixture according to claim 1, characterized in that, The area ratio of the flow-through groove to the support surface is 4-7:

1.

4. The membrane package fixture according to claim 1, characterized in that, The liquid inlet area overlaps with the projection of the first through hole or the second through hole of the membrane package on the flow-through groove, and the support portion includes a hole peripheral support section at least partially outside the liquid inlet area, and the hole peripheral support section is connected or intersects with the projection of the liquid inlet area in the support direction.

5. The membrane package fixture according to any one of claims 1-4, characterized in that, The support portion is a support plate, the support plate is disposed above the bottom surface of the flow channel groove, and both ends of the support plate extend parallel to both ends of the flow-through groove.

6. The membrane package fixture according to claim 5, characterized in that, The support plate is disposed in the middle of the flow-through groove, and the third fixture through holes are disposed on both sides of the support plate.

7. The membrane package fixture according to claim 6, characterized in that, The third fixture through holes are symmetrically disposed on both sides of the support plate, and the number of the third fixture through holes on one side of the support plate is more than two.

8. The membrane package fixture according to claim 1, wherein The bottom of the flow-through groove is a plane, and the edge of the flow-through groove is rounded.

9. A filtration device comprising the membrane package fixture according to any one of claims 1-8, characterized in that, The filtration device further includes: A membrane package, including, A liquid inlet unit including at least one layer of liquid inlet screen; A filtrate unit including at least a filtrate screen and a filtration layer, the filtration layer being disposed on both sides of the filtrate screen; The liquid inlet unit and the filtrate unit are alternately stacked along the thickness direction of the membrane package; Both the liquid inlet unit and the filtrate unit have a first through hole and a second through hole; One side of the filtration layer close to the liquid inlet screen is a liquid inlet surface, and a first liquid flow channel is formed between the liquid inlet surfaces of adjacent filtration layers, and the first liquid flow channel communicates with the first through hole; One side of the filtration layer close to the filtrate screen is an outlet liquid surface, and a second liquid flow channel is formed between the outlet liquid surfaces of adjacent filtration layers, and the second liquid flow channel communicates with the second through hole; Fastener, and the fastener is used to fasten and seal a membrane package, a flow channel plate and a clamping plate.

10. The filtering device according to claim 9, characterized in that, Clamping surfaces are provided on both sides of the flow channel plate, and the membrane package includes at least two groups, which are respectively clamped between the clamping surfaces on both sides of the flow channel plate and the clamping plate.

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