Gasket set and tangential flow filtration system

Abstract

The application relates to the technical field of filtering devices, and discloses a gasket set and a tangential flow filtering system, a first gasket, a second gasket and a third gasket, the first gasket being provided with a first through hole and a second through hole. The second gasket is provided with a third through hole and a fourth through hole. The third gasket is provided with a fifth through hole and a sixth through hole. The first gasket, the second gasket and the third gasket are sequentially arranged along a first direction. The gasket set is used for pasting a first tangential filtering membrane pack between the first gasket and the second gasket and pasting a second tangential filtering membrane pack between the second gasket and the third gasket, so that the first tangential filtering membrane pack and the second tangential filtering membrane pack can be connected in series. Compared with the structure of arranging a connecting pipeline between the first tangential filtering membrane pack and the second tangential filtering membrane pack, the structure is simpler and occupies less space.

Description

Technical Field

[0001] This application relates to the field of filtration device technology, specifically to a gasket assembly and a tangential flow filtration system. Background Technology

[0002] Traditional liquid filtration is dead-end filtration, also known as vertical filtration, where the liquid flow direction is the same as the filtration direction. However, as filtration progresses, the thickness of the filter cake or gel layer formed on the filter membrane surface gradually increases, and the flow rate gradually decreases. Therefore, dead-end filtration can only handle small volumes of liquid. For larger-scale liquid filtration, tangential flow filtration is required. In tangential flow filtration, the liquid flow direction is perpendicular to the filtration direction. Filtration is achieved by the tangential force generated by the liquid flow on the filter media surface, reducing the accumulation of filter cake or gel layers. This method is widely used in ultrafiltration (UF) and some microfiltration (MF) processes. Tangential flow filtration is often achieved through tangential flow tangential filter membranes.

[0003] A filter membrane is disposed within a tangential filter membrane pack. The filter membrane divides the internal space of the tangential filter membrane pack into a first inner cavity and a second inner cavity. A first perforation and a second perforation are formed through the first end of the end face of the tangential filter membrane pack, and a third perforation and a fourth perforation are formed through the second end. Since the tangential filter membrane pack itself has a centrally symmetrical structure, the first and third perforations communicate with the first inner cavity, with one serving as the feed inlet and the other as the waste outlet. The second and fourth perforations are the concentrate outlets.

[0004] When connecting two tangential filter membrane packs in series, it is often necessary to install a pipeline between the two tangential filter membrane packs and seal the useless pore ends of the two tangential filter membrane packs, which results in a complex structure and a large space occupation.

[0005] Therefore, how to solve or improve the problem of complex series structure and large space occupation between two tangential filter membrane packs in related technologies has become an important technical problem to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, this application provides a gasket assembly and a tangential flow filtration system to solve or improve the problem of complex series structure and large space occupation between two tangential filter membrane packs.

[0007] In a first aspect, this application provides a gasket assembly, comprising:

[0008] The first gasket has a first through hole and a second through hole through it;

[0009] The second gasket has a third through hole and a fourth through hole.

[0010] The third gasket has a fifth through hole and a sixth through hole, wherein the first gasket, the second gasket, and the third gasket are arranged at intervals along a first direction.

[0011] The first gasket and the second gasket are adapted to fit together to form a first tangential filter membrane pack, such that the feed inlet of the first tangential filter membrane pack is connected to the first through hole, the buffer inlet of the first tangential filter membrane pack is connected to the second through hole, and the second gasket covers the feed inlet of the first tangential filter membrane pack.

[0012] The second gasket and the third gasket are adapted to fit together to form a second tangential filter membrane pack, such that the concentrate outlet of the first tangential filter membrane pack is connected to the feed inlet of the second tangential filter membrane pack through the third through-hole, the waste outlet of the first tangential filter membrane pack is connected to the waste outlet of the second tangential filter membrane pack through the fourth through-hole, the third gasket covers the feed inlet of the second tangential filter membrane pack, the concentrate outlet of the second tangential filter membrane pack is connected to the fifth through-hole, and the waste outlet of the second tangential filter membrane pack is connected to the sixth through-hole.

[0013] Optionally, it also includes:

[0014] The fourth gasket has a seventh and an eighth through hole. A third tangential filter membrane pack is fitted between the third and fourth gaskets to ensure that...

[0015] The feed inlet of the third tangential filter membrane pack is connected to the fifth through hole, the fourth gasket covers the concentrate outlet of the third tangential filter membrane pack, the concentrate outlet of the third tangential filter membrane pack is connected to the seventh through hole, and the waste outlet of the third tangential filter membrane pack is connected to the sixth through hole and the eighth through hole respectively.

[0016] Optionally, at least two of the second gasket and the third gasket are provided, and the second gasket and the third gasket are alternately spaced along the first direction, and the second tangential filter membrane pack is adapted to be attached between adjacent second gaskets and third gaskets.

[0017] Optionally, the second gasket has a ninth through hole, and the third gasket has a tenth through hole;

[0018] When the first tangential filter membrane pack is attached between the first pad and the second pad, the ninth through hole is connected to the buffer inlet of the first tangential filter membrane pack;

[0019] When the second tangential filter membrane pack is attached between the second pad and the third pad, the tenth through hole is connected to the buffer inlet of the second tangential filter membrane pack;

[0020] When the third tangential filter membrane pack is attached between the third gasket and the fourth gasket, the tenth through hole is connected to the buffer inlet of the third tangential filter membrane pack.

[0021] The first, second, third, and fourth gaskets are made of one of the following materials: rubber, silicone, or polytetrafluoroethylene (PTFE). The gasket thickness is 0.5-2.5 mm. A gasket thickness greater than 0.5 mm is required to effectively seal the area around the pores of the tangential filter membrane pack after compression deformation, eliminating the risk of feed liquid cross-flow. A gasket thickness less than 2.5 mm is also required to prevent the gasket from sinking into the membrane pack surface under external locking force, thus avoiding the risk of affecting membrane pack flux or even damaging the membrane pack.

[0022] Secondly, this application also provides a tangential flow filtration system, comprising:

[0023] Any of the gasket sets described above;

[0024] The first tangential filter membrane is fitted between the first gasket and the second gasket;

[0025] The second tangential filter membrane pack is fitted between the second gasket and the third gasket.

[0026] Thirdly, this application also provides a tangential flow filtration system, comprising:

[0027] The gasket assembly described above;

[0028] The first tangential filter membrane is fitted between the first gasket and the second gasket;

[0029] The second tangential filter membrane pack is fitted between the second gasket and the third gasket;

[0030] The third tangential filter membrane pack is fitted between the third gasket and the fourth gasket;

[0031] The first end plate is provided with a first inlet, a second inlet, a first outlet communicating with the first inlet and a second outlet communicating with the second inlet. The first end plate is attached to the side of the first gasket that is away from the first tangential filter membrane pack. The first outlet communicates with the first through hole on the first gasket and the second outlet communicates with the second through hole on the first gasket.

[0032] The second end plate is provided with a third inlet, a fourth inlet, a third outlet communicating with the third inlet and a fourth outlet communicating with the fourth inlet. The second end plate is attached to the side of the fourth gasket opposite to the third tangential filter membrane pack. The third inlet communicates with the seventh through hole and the fourth inlet communicates with the eighth through hole.

[0033] Optionally, it also includes:

[0034] At least two fixing rods are provided, each of which is connected between the first end plate and the second end plate. The first gasket, the first tangential filter membrane pack, the second gasket, the second tangential filter membrane pack, the third gasket, the third tangential filter membrane pack, and the fourth gasket are all sandwiched between the two fixing rods.

[0035] Optionally, the first gasket and / or the second gasket and / or the third gasket and / or the fourth gasket may have a positioning ring or positioning groove that matches the fixing rod on the side near the fixing rod.

[0036] Optionally, the second gasket has a ninth through hole, and the third gasket has a tenth through hole.

[0037] When the first tangential filter membrane pack is attached between the first pad and the second pad, the ninth through hole is connected to the buffer inlet of the first tangential filter membrane pack;

[0038] When the second tangential filter membrane pack is attached between the second pad and the third pad, the tenth through hole is connected to the buffer inlet of the second tangential filter membrane pack;

[0039] When the third tangential filter membrane pack is attached between the third gasket and the fourth gasket, the tenth through hole is connected to the buffer inlet of the third tangential filter membrane pack;

[0040] The first gasket, the second gasket, the third gasket, and the fourth gasket have the same shape.

[0041] Optionally, it also includes:

[0042] The base, the first end plate and / or the second end plate are connected to the base.

[0043] This application provides a gasket assembly in which a first tangential filter membrane pack is bonded between a first gasket and a second gasket, and a third tangential filter membrane pack is bonded between the second and third gaskets. When a feed solution is introduced into the first through-hole on the first gasket, it enters the feed solution inlet of the first tangential filter membrane pack. When a buffer solution is introduced into the second through-hole on the first gasket, it enters the buffer solution inlet of the first tangential filter membrane pack. Because the second gasket seals the end of the feed solution inlet and buffer solution inlet of the first tangential filter membrane pack away from the first gasket, the feed solution cannot be discharged from the end of the feed solution inlet near the second gasket, thus allowing it to flow normally through the first tangential filter membrane pack for filtration. The filtered concentrate, after mixing and reacting with the buffer solution, flows to the concentrate outlet of the first tangential filter membrane pack, while the filtered waste liquid flows to the waste liquid outlet of the first tangential filter membrane pack.

[0044] Subsequently, the concentrate flows through the third through-hole on the second gasket to the feed inlet of the second tangential filter membrane pack, and the waste liquid flows through the fourth through-hole on the second gasket to the waste outlet of the second tangential filter membrane pack. Because the third gasket seals the end of the feed inlet and buffer inlet of the second tangential filter membrane pack away from the second gasket, the feed liquid cannot be discharged from the end of the feed inlet of the second tangential filter membrane pack near the third gasket, thus allowing it to flow normally through the second tangential filter membrane pack for filtration. The filtered concentrate flows to the concentrate outlet of the second tangential filter membrane pack and then out through the fifth through-hole of the third gasket. The filtered waste liquid flows to the waste outlet of the second tangential filter membrane pack and mixes with the waste liquid flowing out of the first tangential filter membrane pack before flowing out through the sixth through-hole of the third gasket.

[0045] By using a gasket assembly, the first tangential filter membrane pack is bonded between the first and second gaskets, and the second tangential filter membrane pack is bonded between the second and third gaskets, thus achieving series connection of the first and second tangential filter membrane packs. Compared to setting up a connecting pipe between the first and second tangential filter membrane packs, the structure is simpler and occupies less space. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this application, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0047] Figure 1 This is an exploded view of a gasket assembly according to an embodiment of this application;

[0048] Figure 2 This is an exploded view of another gasket assembly according to an embodiment of this application;

[0049] Figure 3 This is an exploded view of a tangential flow filtration system according to an embodiment of this application;

[0050] Figure 4 This is an exploded view of another tangential flow filtration system according to an embodiment of this application;

[0051] Figure 5 This is an exploded view of another tangential flow filtration system according to an embodiment of this application;

[0052] Figure 6 This is an exploded view of another tangential flow filtering system according to an embodiment of this application.

[0053] Figure 7 This is a schematic diagram of the first end plate structure of a tangential flow filtration system according to an embodiment of this application.

[0054] Explanation of reference numerals in the attached figures:

[0055] 1. First gasket; 101. First through hole; 102. Second through hole; 2. Second gasket; 201. Third through hole; 202. Fourth through hole; 203. Ninth through hole; 3. Third gasket; 301. Fifth through hole; 302. Sixth through hole; 303. Tenth through hole; 4. Fourth gasket; 401. Seventh through hole; 402. Eighth through hole; 5. First end plate; 501. First inlet; 502. Second inlet; 503. First outlet; 504. Second outlet; 505. First insertion hole; 6. Second end plate; 601. Third inlet; 602. Fourth inlet; 603. Third outlet; 604. Fourth outlet; 605. Second insertion hole; 7. Fixing rod; 8. Base; 9. First tangential filter membrane pack; 10. Second tangential filter membrane pack; 11. Third tangential filter membrane pack. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0057] The following is combined Figures 1 to 7 This describes an embodiment of the present application.

[0058] According to embodiments of this application, in one aspect, a gasket assembly is provided, such as... Figure 1 As shown, it includes: a first gasket 1, a second gasket 2, and a third gasket 3.

[0059] The first gasket 1 has a first through hole 101 and a second through hole 102, the second gasket 2 has a third through hole 201 and a fourth through hole 202, and the third gasket 3 has a fifth through hole 301 and a sixth through hole 302.

[0060] The first gasket 1, the second gasket 2, and the third gasket 3 are arranged sequentially along the first direction X, such that the first through hole 101 and the fifth through hole 301 are aligned along the first direction X, and the fourth through hole 202 and the sixth through hole 302 are aligned along the first direction X.

[0061] The first gasket 1, the second gasket 2, and the third gasket 3 are arranged alternately, and a first tangential filter membrane pack 9 is arranged between the first gasket 1 and the second gasket 2.

[0062] The first end face of the first tangential filter membrane pack 9 is attached to the first gasket 1, such that the first through hole 101 on the first gasket 1 is aligned and connected with the feed liquid inlet of the first tangential filter membrane pack 9 along the first direction X, the second through hole 102 on the first gasket 1 is aligned and connected with the buffer solution inlet of the first tangential filter membrane pack 9 along the first direction X, and the concentrate outlet and waste liquid outlet of the first tangential filter membrane pack 9 are closed by the first gasket 1 at the end near the first gasket 1.

[0063] The second end face of the first tangential filter membrane pack 9 is attached to the second gasket 2, such that the third through hole 201 on the second gasket 2 is aligned and connected to the concentrate outlet of the first tangential filter membrane pack 9 along the first direction X. The fourth through hole 202 on the second gasket 2 is aligned and connected to the waste outlet of the first tangential filter membrane pack 9 along the first direction X. The feed inlet and buffer inlet of the first tangential filter membrane pack 9 are closed by the second gasket 2 at the ends near the second gasket 2.

[0064] A second tangential filter membrane pack 10 is disposed between the second gasket 2 and the third gasket 3.

[0065] The first end face of the second tangential filter membrane pack 10 is attached to the second gasket 2, such that the third through hole 201 on the second gasket 2 is aligned and connected to the feed inlet of the second tangential filter membrane pack 10 along the first direction X, and the fourth through hole 202 on the second gasket 2 is aligned and connected to the waste outlet of the second tangential filter membrane pack 10 along the first direction X. The concentrate outlet and buffer inlet of the second tangential filter membrane pack 10 are sealed by the first gasket 1 at the ends near the second gasket 2.

[0066] The second end face of the second tangential filter membrane pack 10 is attached to the third gasket 3, such that the fifth through hole 301 on the third gasket 3 is aligned and connected with the concentrate outlet of the second tangential filter membrane pack 10 along the first direction X, and the sixth through hole 302 on the third gasket 3 is aligned and connected with the waste liquid outlet of the second tangential filter membrane pack 10 along the first direction X. The feed liquid inlet and buffer liquid inlet of the second tangential filter membrane pack 10 are closed by the third gasket 3 at the end near the third gasket 3.

[0067] With this configuration, the feed solution is introduced into the feed inlet of the first tangential filter membrane pack 9 through the first through-hole 101 on the first gasket 1, and the buffer solution is introduced into the buffer solution inlet of the first tangential filter membrane pack 9 through the second through-hole 102 on the first gasket 1. Because the second gasket 2 seals the end of the feed inlet and buffer solution inlet of the first tangential filter membrane pack 9 away from the first gasket 1, the feed solution cannot be discharged from the end of the feed inlet near the second gasket 2, thus allowing it to flow normally through the first tangential filter membrane pack 9 for filtration. The filtered concentrate is mixed and reacted with the buffer solution and flows to the concentrate outlet of the first tangential filter membrane pack 9, while the filtered waste liquid flows to the waste liquid outlet of the first tangential filter membrane pack 9.

[0068] Subsequently, the concentrate flows through the third through-hole 201 on the second gasket 2 to the feed inlet of the second tangential filter membrane pack 10, and the waste liquid flows through the fourth through-hole 202 on the second gasket 2 to the waste outlet of the second tangential filter membrane pack 10. Since the third gasket 3 closes the end of the feed inlet and buffer inlet of the second tangential filter membrane pack 10 away from the second gasket 2, the feed liquid cannot be discharged from the end of the feed inlet of the second tangential filter membrane pack 10 near the third gasket 3, thus allowing it to flow normally through the second tangential filter membrane pack 10 for filtration. The filtered concentrate flows to the concentrate outlet of the second tangential filter membrane pack 10 and then flows out through the fifth through-hole 301 of the third gasket 3. The filtered waste liquid flows to the waste outlet of the second tangential filter membrane pack 10 and mixes with the waste liquid flowing out of the first tangential filter membrane pack 9 before flowing out through the sixth through-hole 302 of the third gasket 3.

[0069] By using a gasket assembly, the first tangential filter membrane pack 9 is attached between the first gasket 1 and the second gasket 2, and the second tangential filter membrane pack 10 is attached between the second gasket 2 and the third gasket 3, thus achieving series connection of the first tangential filter membrane pack 9 and the second tangential filter membrane pack 10. Compared to setting a connecting pipe between the first tangential filter membrane pack 9 and the second tangential filter membrane pack 10, the structure is simpler and occupies less space.

[0070] The second gasket 2 can be rotated 180 degrees and interchanged with the first gasket 1. For example, after the first gasket 1 is replaced with the second gasket 2, the third through hole 201 on the second gasket 2 is equivalent to the first through hole 101 on the first gasket 1, and the fourth through hole 202 on the second gasket 2 is equivalent to the second through hole 102 on the first gasket 1.

[0071] Wherein, the first direction X is the thickness direction of the first tangential filter membrane pack 9 and the second tangential filter membrane pack 10.

[0072] As an optional embodiment, such as Figure 1 As shown, it also includes a fourth gasket 4, on which a seventh through hole 401 and an eighth through hole 402 are formed. The first gasket 1, the second gasket 2, the third gasket 3 and the fourth gasket 4 are arranged sequentially along the first direction X, such that the eighth through hole 402 is aligned with the sixth through hole 302 along the first direction X.

[0073] The first gasket 1, the second gasket 2, the third gasket 3 and the fourth gasket 4 are arranged alternately in sequence. A first tangential filter membrane pack 9 is arranged between the first gasket 1 and the second gasket 2, and a second tangential filter membrane pack 10 is arranged between the second gasket 2 and the third gasket 3.

[0074] In addition, a third tangential filter membrane pack 11 is provided between the third gasket 3 and the fourth gasket 4.

[0075] The first end face of the third tangential filter membrane pack 11 is attached to the third gasket 3, such that the fifth through hole 301 on the third gasket 3 is aligned and connected with the feed inlet of the third tangential filter membrane pack 11 along the first direction X, and the sixth through hole 302 on the third gasket 3 is aligned and connected with the waste outlet of the third tangential filter membrane pack 11 along the first direction X. The buffer solution inlet and concentrate outlet of the third tangential filter membrane pack 11 are sealed by the third gasket 3 at the ends near the third gasket 3.

[0076] The second end face of the third tangential filter membrane pack 11 is attached to the fourth gasket 4, such that the seventh through hole 401 on the fourth gasket 4 is aligned and connected with the concentrate outlet of the third tangential filter membrane pack 11 along the first direction X, and the seventh through hole 401 on the fourth gasket 4 is aligned and connected with the waste liquid outlet of the third tangential filter membrane pack 11 along the first direction X. The feed inlet and buffer inlet of the third tangential filter membrane pack 11 at the ends away from the third gasket 3 are closed by the fourth gasket 4.

[0077] With this configuration, the concentrated liquid filtered by the second tangential filter membrane pack 10 flows into the feed inlet of the third tangential filter membrane pack 11 through the fifth through hole 301 of the third gasket 3. Since the fourth gasket 4 seals the end of the feed inlet of the third tangential filter membrane pack 11 away from the third gasket 3, the feed liquid cannot be discharged from the end of the feed inlet near the fourth gasket 4, thus allowing it to flow normally through the second tangential filter membrane pack 10 for filtration. The filtered concentrated liquid flows to the concentrated liquid outlet of the third tangential filter membrane pack 11 and then flows out through the seventh through hole 401 of the fourth gasket 4. The filtered waste liquid flows to the waste liquid outlet of the third tangential filter membrane pack 11 and mixes with the waste liquid flowing out of the first tangential filter membrane pack 9 and the second tangential filter membrane pack 10 before flowing out through the eighth through hole 402 of the fourth gasket 4.

[0078] By using a gasket assembly, the first tangential filter membrane pack 9 is attached between the first gasket 1 and the second gasket 2, the second tangential filter membrane pack 10 is attached between the second gasket 2 and the third gasket 3, and the third tangential filter membrane pack 11 is attached between the third gasket 3 and the fourth gasket 4. This allows the first tangential filter membrane pack 9, the second tangential filter membrane pack 10, and the third tangential filter membrane pack 11 to be connected in series, thus enabling the series connection of more filter membrane packs.

[0079] Compared to setting connecting pipes between the first tangential filter membrane pack 9 and the second tangential filter membrane pack 10, and between the second tangential filter membrane pack 10 and the third tangential filter membrane pack 11, the structure is simpler and occupies less space.

[0080] The fourth gasket 4 can be the same as the second gasket 2, so that the second gasket 2 can be directly interchanged with the fourth gasket 4. For example, after the fourth gasket 4 is replaced by the second gasket 2, the third through hole 201 on the second gasket 2 is equivalent to the seventh through hole 401 on the fourth gasket 4, and the fourth through hole 202 on the second gasket 2 is equivalent to the eighth through hole 402 on the fourth gasket 4.

[0081] The bonding methods between the gasket and the tangential filter membrane can include injection molding, adhesive edging, hot melt welding, or compression fixing.

[0082] In an optional embodiment, at least two second gaskets 2 and three third gaskets 3 are provided, and the number of second gaskets 2 and three third gaskets 3 is the same. The second gaskets 2 and three third gaskets 3 are alternately arranged along the first direction X, with adjacent second gaskets 2 and third gaskets 3 spaced apart.

[0083] A second tangential filter membrane pack 10 is provided between adjacent second gaskets 2 and third gaskets 3, taking two packs of each of the second gaskets 2 and third gaskets 3 as an example:

[0084] Along the first direction X, the first second gasket 2 is bonded to the end face of the first tangential filter membrane pack 9 facing away from the first gasket 1, a second tangential filter membrane pack 10 is bonded between the first third gasket 3 and the second second gasket 2, a second tangential filter membrane pack 10 is bonded between the second second gasket 2 and the second third gasket 3, and a third tangential filter membrane pack 11 is bonded between the second third gasket 3 and the fourth gasket 4.

[0085] The arrangement of a second tangential filter membrane pack 10 between the first third gasket 3 and the second second gasket 2 is the same as that of a third tangential filter membrane pack 11 between the third gasket 3 and the fourth gasket 4, and therefore will not be described again.

[0086] This configuration enables the series connection of the first tangential filter membrane pack 9, multiple second tangential filter membrane packs 10, and the third tangential filter membrane pack 11, thus achieving the series connection of more filter membrane packs. The first tangential filter membrane pack 9 is an integrated concentration and liquid exchange filter membrane pack, including a concentration unit, a liquid inlet unit, and a liquid exchange unit. The second tangential filter membrane packs 10 and the third tangential filter membrane pack 11 can be concentration filter membrane packs, including a concentration unit and a liquid inlet unit, or they can be integrated concentration and liquid exchange filter membrane packs.

[0087] In optional embodiments, such as Figure 2 As shown, a ninth through hole 203 is formed through the second gasket 2, and a tenth through hole 303 is formed through the third gasket 3. The second through hole 102, the ninth through hole 203, and the tenth through hole 303 are aligned along the first direction X.

[0088] Thus, after the first tangential filter membrane pack 9 is attached between the first gasket 1 and the second gasket 2, the second through hole 102 on the first gasket 1 communicates with the ninth through hole 203 on the second gasket 2 through the buffer inlet of the first tangential filter membrane pack 9. After the second tangential filter membrane pack 10 is attached between the second gasket 2 and the third gasket 3, the ninth through hole 203 on the second gasket 2 communicates with the tenth through hole 303 on the third gasket 3 through the buffer inlet of the second tangential filter membrane pack 10. After the third tangential filter membrane pack 11 is attached between the third gasket 3 and the fourth gasket 4, the end of the buffer inlet of the third tangential filter membrane pack 11 near the third gasket 3 communicates with the tenth through hole 303 on the third gasket 3, and the end of the buffer inlet of the third tangential filter membrane pack 11 away from the third gasket 3 is closed by the fourth gasket 4.

[0089] Thus, when buffer solution is introduced into the second through-hole 102 on the first gasket 1, the buffer solution can flow sequentially to the buffer solution inlet of the first tangential filter membrane pack 9, the buffer solution inlet of the second tangential filter membrane pack 10, and the buffer solution inlet of the third tangential filter membrane pack 11. This can address scenarios where each tangential filter membrane pack needs to be filled with buffer solution. The first tangential filter membrane pack 9, the multiple second tangential filter membrane packs 10, and the third tangential filter membrane pack 11 are all integrated concentration and liquid exchange filter membrane packs, including a concentration unit, a liquid inlet unit, and a liquid exchange unit.

[0090] The materials of the first gasket 1, the second gasket 2, the third gasket 3, and the fourth gasket 4 are one of rubber, silicone, and polytetrafluoroethylene. The thickness of the gaskets is 0.5-2.5 mm. The gasket thickness must be greater than 0.5 mm so that the gaskets can effectively seal around the pores of the tangential filter membrane pack after being deformed by extrusion, eliminating the risk of feed liquid cross-flow. The gasket thickness must be less than 2.5 mm so that the gaskets below this thickness will not sink into the membrane pack surface under external locking force, thereby eliminating the risk of affecting the membrane pack flux or even damaging the membrane pack.

[0091] According to embodiments of this application, another aspect also provides a tangential flow filtration system, such as... Figure 3 As shown, it includes any of the above-mentioned gasket sets, and also includes a first tangential filter membrane pack 9 and a second tangential filter membrane pack 10, wherein;

[0092] The first tangential filter membrane 9 is bonded and disposed between the first gasket 1 and the second gasket 2.

[0093] The second tangential filter membrane 10 is bonded and disposed between the second gasket 2 and the third gasket 3.

[0094] The technical effect produced by this tangential flow filtration system is the same as that of the gasket assembly, so it will not be described in detail here.

[0095] According to embodiments of this application, in another aspect, a tangential flow filtration system is also provided, such as... Figure 3 As shown, it includes a gasket assembly, a first tangential filter membrane pack 9, a second tangential filter membrane pack 10, a third tangential filter membrane pack 11, a first end plate 5, and a second end plate 6.

[0096] The first end plate 5, the first gasket 1, the first tangential filter membrane pack 9, the second gasket 2, the second tangential filter membrane pack 10, the third gasket 3, the third tangential filter membrane pack 11, the fourth gasket 4, and the second end plate 6 are arranged sequentially along the first direction X.

[0097] The arrangement of the first gasket 1, the first tangential filter membrane pack 9, the second gasket 2, the second tangential filter membrane pack 10, the third gasket 3, the third tangential filter membrane pack 11, and the fourth gasket 4 is the same as that in the above gasket group, so it will not be described again.

[0098] As for the first end plate 5, such as 3 and Figure 7 As shown, the first end plate 5 is provided with a first inlet 501, a second inlet 502, a first outlet 503, and a second outlet 504. A channel is provided within the first end plate 5 to connect the first inlet 501 with the first outlet 503, and the second inlet 502 with the second outlet 504. One side of the first gasket 1 is attached to the first tangential filter membrane pack 9, and the side facing away from the first tangential filter membrane pack 9 is attached to the first end plate 5. This ensures that the end of the first through hole 101 on the first gasket 1 facing away from the first tangential filter membrane is aligned and connected to the first outlet 503 on the first end plate 5, and the end of the second through hole 102 on the first gasket 1 facing away from the first tangential filter membrane is aligned and connected to the second outlet 504 on the first end plate 5.

[0099] Thus, liquid feed is introduced into the first inlet 501, and the liquid feed is discharged from the first outlet 503 to the first through hole 101 on the first gasket 1. Buffer is introduced into the second inlet 502, and the buffer is discharged from the second outlet 504 to the second through hole 102 on the first gasket 1, making feeding more convenient.

[0100] With this configuration, when the permeate is introduced into the first tangential filter membrane pack 9, there is no need to set up additional pipelines; the buffer solution can be directly introduced into the second inlet 502, which simplifies the structure and reduces the space occupied.

[0101] For the second end plate 6, as Figure 3 As shown, the second end plate 6 is provided with a third inlet 601, a fourth inlet 602, a third outlet 603, and a fourth outlet 604. A channel is provided within the second end plate 6 to connect the third inlet 601 and the third outlet 603, and the fourth inlet 602 and the fourth outlet 604. One side of the fourth gasket 4 is attached to the third tangential filter membrane pack 11, and the side facing away from the third tangential filter membrane pack 11 is attached to the second end plate 6. This ensures that the end of the seventh through hole 401 on the fourth gasket 4 facing away from the third tangential filter membrane is aligned and connected to the third outlet 603 on the second end plate 6, and the end of the eighth through hole 402 on the fourth gasket 4 facing away from the third tangential filter membrane is aligned and connected to the fourth outlet 604 on the second end plate 6.

[0102] Thus, the concentrate flows out of the concentrate outlet of the third tangential filter membrane and enters the third inlet 601 on the second end plate 6 through the seventh through hole 401 on the fourth gasket 4. The waste liquid flows out of the waste liquid outlet of the third tangential filter membrane and enters the fourth inlet 602 on the second end plate 6 through the eighth through hole 402 on the fourth gasket 4. At this time, the concentrate can be collected from the third outlet 603 and the waste liquid can be collected from the fourth outlet 604, making the discharge more convenient.

[0103] As an optional embodiment, such as Figure 3 As shown, the tangential flow filtration system also includes at least two fixing rods 7, each fixing rod 7 being connected between the first end plate 5 and the second end plate 6. The first gasket 1, the first tangential filter membrane pack 9, the second gasket 2, the second tangential filter membrane pack 10, the third gasket 3, the third tangential filter membrane pack 11, and the fourth gasket 4 are all sandwiched between two of the fixing rods 7.

[0104] Taking two fixing rods 7 as an example, the two fixing rods 7 are respectively connected between the first end plate 5 and the second end plate 6, and are parallel to each other. Both fixing rods 7 are set parallel to each other along the first direction X, so that there is a certain gap between the two fixing rods 7.

[0105] When setting the first gasket 1, the first tangential filter membrane pack 9, the second gasket 2, the second tangential filter membrane pack 10, the third gasket 3, the third tangential filter membrane pack 11, and the fourth gasket 4, the two fixing rods 7 are respectively located on both sides of the first gasket 1, the first tangential filter membrane pack 9, the second gasket 2, the second tangential filter membrane pack 10, the third gasket 3, the third tangential filter membrane pack 11, and the fourth gasket 4 in a direction perpendicular to the first direction X. This ensures that the first gasket 1, the first tangential filter membrane pack 9, the second gasket 2, the second tangential filter membrane pack 10, the third gasket 3, the third tangential filter membrane pack 11, and the fourth gasket 4 are all sandwiched between the two fixing rods 7, making the overall structure more stable.

[0106] Specifically, a plurality of first insertion holes 505 are provided on the first end plate 5, and a plurality of second insertion holes 605 are provided on the second end plate 6. For each fixing rod 7, one end is inserted into a first insertion hole 505 and the other end is inserted into a second insertion hole 605.

[0107] In optional embodiments, such as Figure 5 As shown, for the first washer 1, the second washer 2, the third washer 3, and the fourth washer 4, a positioning ring is provided on the side of any one of them near the fixed rod 7, or positioning rings are provided on the sides of any two of them near the fixed rod 7, or positioning rings are provided on the sides of all of them near the fixed rod 7. The positioning rings are matched with the fixed rod 7.

[0108] In this way, when the fixing rod 7 passes through the positioning ring, it matches and connects with the positioning ring, further increasing the clamping capacity of the fixing rod 7 for the first washer 1, the second washer 2, the third washer 3 and the fourth washer 4.

[0109] In optional embodiments, such as Figure 3 As shown, for the first gasket 1, the second gasket 2, the third gasket 3, and the fourth gasket 4, a positioning groove is provided on the side of any one of them closest to the fixing rod 7, or positioning grooves are provided on the sides of any two of them closest to the fixing rod 7, or positioning grooves are provided on the sides of all of them closest to the fixing rod 7. The positioning groove matches the fixing rod 7.

[0110] This connection between the fixing rod 7 and the positioning groove further increases the clamping capacity of the fixing rod 7 for the first washer 1, the second washer 2, the third washer 3 and the fourth washer 4.

[0111] For gasket sets, such as Figure 3As shown, the first gasket 1, the first tangential filter membrane pack 9, the second gasket 2, the second tangential filter membrane pack 10, the third gasket 3, the third tangential filter membrane pack 11, and the fourth gasket 4 can be combined into a single unit. In this case, positioning grooves are provided on the side of the first gasket 1, the second gasket 2, the third gasket 3, and the fourth gasket 4 near the fixing rod 7.

[0112] like Figure 4 As shown, the second gasket 2, the second tangential filter membrane pack 10, the third gasket 3, the third tangential filter membrane pack 11, and the fourth gasket 4 can also be combined into a whole, while the first gasket 1 and the first tangential filter membrane pack 9 are set separately. In this case, the second gasket 2, the third gasket 3, and the fourth gasket 4 are provided with positioning grooves on the side near the fixing rod 7, and the first gasket 1 is provided with a positioning ring on the side near the fixing rod 7.

[0113] As an optional embodiment, a ninth through hole 203 is formed on the second gasket 2, and a tenth through hole 303 is formed on the third gasket 3. The second through hole 102, the ninth through hole 203, and the tenth through hole 303 are aligned along the first direction X.

[0114] Thus, after the first tangential filter membrane pack 9 is attached between the first gasket 1 and the second gasket 2, the second through hole 102 on the first gasket 1 communicates with the ninth through hole 203 on the second gasket 2 through the buffer inlet of the first tangential filter membrane pack 9. After the second tangential filter membrane pack 10 is attached between the second gasket 2 and the third gasket 3, the ninth through hole 203 on the second gasket 2 communicates with the tenth through hole 303 on the third gasket 3 through the buffer inlet of the second tangential filter membrane pack 10. After the third tangential filter membrane pack 11 is attached between the third gasket 3 and the fourth gasket 4, the end of the buffer inlet of the third tangential filter membrane pack 11 near the third gasket 3 communicates with the tenth through hole 303 on the third gasket 3, and the end of the buffer inlet of the third tangential filter membrane pack 11 away from the third gasket 3 is closed by the fourth gasket 4.

[0115] In this way, when buffer solution is introduced into the second through-hole 102 on the first gasket 1, the buffer solution can flow sequentially to the buffer solution inlet of the first tangential filter membrane pack 9, the buffer solution inlet of the second tangential filter membrane pack 10, and the buffer solution inlet of the third tangential filter membrane pack 11. This can address scenarios where buffer solution needs to be introduced into each tangential filter membrane pack.

[0116] With this configuration, when permeate is introduced into the first tangential filter membrane pack 9, the second tangential filter membrane pack 10, and the third tangential filter membrane pack 11, there is no need to install pipelines between the first tangential filter membrane pack 9 and the second tangential filter membrane pack 10 or between the second tangential filter membrane pack 10 and the third tangential filter membrane pack 11. Buffer solution can be directly introduced into the second inlet 502, simplifying the structure and reducing the space occupied.

[0117] In this configuration, the first gasket 1, the second gasket 2, the third gasket 3, and the fourth gasket 4 are identical in shape. The third gasket 3 can be directly interchanged with the first gasket 1. For example, after replacing the first gasket 1 with the third gasket 3, the fifth through hole 301 on the third gasket 3 becomes equivalent to the first through hole 101 on the first gasket 1, and the tenth through hole 303 on the third gasket 3 becomes equivalent to the second through hole 102 on the first gasket 1. Meanwhile, the sixth through hole 302 on the third gasket 3 is sealed by the first end plate 5, preventing waste liquid filtered by the first tangential filter membrane 9 from being discharged through the sixth through hole 302 on the third gasket 3.

[0118] The second gasket 2 can be directly interchanged with the fourth gasket 4. For example, after replacing the fourth gasket 4 with the second gasket 2, the third through hole 201 on the second gasket 2 is equivalent to the seventh through hole 401 on the fourth gasket 4, and the fourth through hole 202 on the second gasket 2 is equivalent to the eighth through hole 402 on the fourth gasket 4. At this time, the ninth through hole 203 on the second gasket 2 is closed by the second end plate 6 to prevent the buffer solution from being discharged through the ninth through hole 203 on the second gasket 2.

[0119] The second gasket 2 can be rotated 180° and interchanged with the third gasket 3. For example, after the second gasket 2 is rotated 180° to replace the third gasket 3, the third through hole 201 on the second gasket 2 is equivalent to the fifth through hole 301 on the third gasket 3, the fourth through hole 202 on the second gasket 2 is equivalent to the tenth through hole 303 on the third gasket 3, and the ninth through hole 203 on the second gasket 2 is equivalent to the sixth through hole 302 on the third gasket 3.

[0120] For gasket sets, such as Figure 6 As shown, the first gasket 1, the first tangential filter membrane pack 9, the second gasket 2, the second tangential filter membrane pack 10, the third gasket 3, the third tangential filter membrane pack 11, and the fourth gasket 4 can be combined into a single unit. At this point, positioning grooves can be provided on the side of the first gasket 1, the second gasket 2, the third gasket 3, and the fourth gasket 4 near the fixing rod 7.

[0121] like Figure 5 As shown, the first gasket 1, the first tangential filter membrane pack 9, the second gasket 2, the second tangential filter membrane pack 10, the third gasket 3, the third tangential filter membrane pack 11, and the fourth gasket 4 can also be set separately. In this case, the first gasket 1, the second gasket 2, the third gasket 3, and the fourth gasket 4 are all provided with positioning rings on the side of the fixed rod 7.

[0122] As an optional embodiment, the tangential flow filtration system also includes a base 8, wherein the bottom of the first end plate 5 is connected to the base 8, so that the base 8 supports the first end plate 5.

[0123] Alternatively, the bottom of the second end plate 6 is connected to the base 8, so that the base 8 supports the second end plate 6.

[0124] In some embodiments, the bottoms of both the first end plate 5 and the second end plate 6 are connected to the base 8.

[0125] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by this application.

Claims

1. A gasket assembly, characterized in that, include: The first gasket (1) has a first through hole (101) and a second through hole (102) through it; The second gasket (2) has a third through hole (201) and a fourth through hole (202) through it; The third gasket (3) has a fifth through hole (301) and a sixth through hole (302) through it. The first gasket (1), the second gasket (2) and the third gasket (3) are arranged at intervals along the first direction. The first gasket (1) and the second gasket (2) are adapted to fit together to form a first tangential filter membrane pack (9), such that the liquid inlet of the first tangential filter membrane pack (9) is connected to the first through hole (101), the buffer inlet of the first tangential filter membrane pack (9) is connected to the second through hole (102), and the second gasket (2) covers the liquid inlet of the first tangential filter membrane pack (9). The second gasket (2) and the third gasket (3) are adapted to fit together to form a second tangential filter membrane pack (10), such that the concentrate outlet of the first tangential filter membrane pack (9) is connected to the feed inlet of the second tangential filter membrane pack (10) through the third through hole (201), the waste outlet of the first tangential filter membrane pack (9) is connected to the waste outlet of the second tangential filter membrane pack (10) through the fourth through hole (202), the third gasket (3) covers the feed inlet of the second tangential filter membrane pack (10), the concentrate outlet of the second tangential filter membrane pack (10) is connected to the fifth through hole (301), and the waste outlet of the second tangential filter membrane pack (10) is connected to the sixth through hole (302).

2. The gasket assembly according to claim 1, characterized in that, Also includes: The fourth gasket (4) has a seventh through hole (401) and an eighth through hole (402) through it. A third tangential filter membrane pack (11) is fitted between the third gasket (3) and the fourth gasket (4) to allow for the following: The feed inlet of the third tangential filter membrane pack (11) is connected to the fifth through hole (301), the fourth gasket (4) covers the concentrate outlet of the third tangential filter membrane pack (11), the concentrate outlet of the third tangential filter membrane pack (11) is connected to the seventh through hole (401), and the waste outlet of the third tangential filter membrane pack (11) is connected to the sixth through hole (302) and the eighth through hole (402) respectively.

3. The gasket assembly according to claim 2, characterized in that, At least two of the second gasket (2) and the third gasket (3) are provided, and the second gasket (2) and the third gasket (3) are alternately spaced along the first direction. The second tangential filter membrane pack (10) is adapted to be attached between adjacent second gaskets (2) and third gaskets (3).

4. The gasket assembly according to claim 2, characterized in that, The second gasket (2) has a ninth through hole (203) through it, and the third gasket (3) has a tenth through hole (303) through it. When the first tangential filter membrane pack (9) is attached between the first gasket (1) and the second gasket (2), the ninth through hole (203) is connected to the buffer inlet of the first tangential filter membrane pack (9); When the second tangential filter membrane pack (10) is attached between the second gasket (2) and the third gasket (3), the tenth through hole (303) is connected to the buffer inlet of the second tangential filter membrane pack (10); When the third tangential filter membrane pack (11) is attached between the third gasket (3) and the fourth gasket (4), the tenth through hole (303) is connected to the buffer inlet of the third tangential filter membrane pack (11).

5. A tangential flow filtration system, characterized in that, include: The gasket assembly according to any one of claims 1-4; The first tangential filter membrane package (9) is attached between the first gasket (1) and the second gasket (2); The second tangential filter membrane pack (10) is fitted between the second gasket (2) and the third gasket (3).

6. A tangential flow filtration system, characterized in that, include: The gasket assembly according to any one of claims 2-3; The first tangential filter membrane package (9) is attached between the first gasket (1) and the second gasket (2); The second tangential filter membrane pack (10) is attached between the second gasket (2) and the third gasket (3); The third tangential filter membrane pack (11) is attached between the third gasket (3) and the fourth gasket (4); The first end plate (5) is provided with a first inlet (501), a second inlet (502), a first outlet (503) communicating with the first inlet (501) and a second outlet (504) communicating with the second inlet (502). The first end plate (5) is attached to the side of the first gasket (1) away from the first tangential filter membrane pack (9). The first outlet (503) is connected to the first through hole (101) on the first gasket (1), and the second outlet (504) is connected to the second through hole (102) on the first gasket (1). The second end plate (6) is provided with a third inlet (601), a fourth inlet (602), a third outlet (603) communicating with the third inlet (601), and a fourth outlet (604) communicating with the fourth inlet (602). The second end plate (6) is attached to the side of the fourth gasket (4) away from the third tangential filter membrane pack (11). The third inlet (601) is communicating with the seventh through hole (401), and the fourth inlet (602) is communicating with the eighth through hole (402).

7. The tangential flow filtration system according to claim 6, characterized in that, Also includes: At least two fixing rods (7) are connected between the first end plate (5) and the second end plate (6), respectively. The first gasket (1), the first tangential filter membrane pack (9), the second gasket (2), the second tangential filter membrane pack (10), the third gasket (3), the third tangential filter membrane pack (11), and the fourth gasket (4) are all sandwiched between the two fixing rods (7).

8. The tangential flow filtration system according to claim 7, characterized in that, The first gasket (1) and / or the second gasket (2) and / or the third gasket (3) and / or the fourth gasket (4) are provided with a positioning ring or positioning groove matching the fixing rod (7) on the side near the fixing rod (7).

9. The tangential flow filtration system according to claim 6, characterized in that, The second gasket (2) has a ninth through hole (203), and the third gasket (3) has a tenth through hole (303). When the first tangential filter membrane pack (9) is attached between the first gasket (1) and the second gasket (2), the ninth through hole (203) is connected to the buffer inlet of the first tangential filter membrane pack (9); When the second tangential filter membrane pack (10) is attached between the second gasket (2) and the third gasket (3), the tenth through hole (303) is connected to the buffer inlet of the second tangential filter membrane pack (10); When the third tangential filter membrane pack (11) is attached between the third gasket (3) and the fourth gasket (4), the tenth through hole (303) is connected to the buffer inlet of the third tangential filter membrane pack (11).

10. The tangential flow filtration system according to claim 6, characterized in that, Also includes: The base (8) is connected to the first end plate (5) and / or the second end plate (6).

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