Shaping apparatus, shaping system, hollow fiber membrane pad, and hollow fiber membrane pad assembly

Abstract

The application provides a setting device, a setting system, a hollow fiber membrane pad and a hollow fiber membrane pad assembly. The setting device comprises a differential setting module. The differential setting module is used to drive the hollow fiber membrane pad to move along a first direction. The differential setting module comprises a differential roller set. The differential roller set comprises two or more differential rollers arranged along a second direction. The second direction is arranged at an angle to the first direction. The trend of the linear velocity of the two or more differential rollers arranged along the second direction is sequentially increasing or sequentially decreasing. Thus, the problem that the hollow fiber membrane pads arranged in the orthogonal manner are easily overlapped with each other is overcome. The hollow fiber membrane pads arranged in the oblique manner are mainly in point contact. The problem of fluid inconsistency between the outer membrane pad and the inner membrane pad, large transmembrane pressure difference, easy adsorption of adhesive substances and the like is effectively solved. The utilization rate of the hollow fiber membrane pad is increased, the performance is improved, and the service life is prolonged.

Description

Technical Field

[0001] This invention relates to the field of hollow fiber membrane pad processing technology, and particularly to a shaping device, a shaping system, a hollow fiber membrane pad, and a hollow fiber membrane pad assembly. Background Technology

[0002] Compared with spiral wound membranes, hollow fiber membranes have a larger specific surface area for the same volume due to their mature technology and simple component structure. They are used in special fields such as water treatment filters, artificial kidneys, and artificial lungs.

[0003] Hollow fiber membrane modules suffer from uneven fluid distribution during use. Ensuring that the liquid flows evenly and without dead zones within the hollow fiber membrane module is crucial and has become an industry challenge.

[0004] Therefore, it is particularly important to prepare the hollow fiber membrane filaments before casting the hollow fiber membrane module so that the thousands of filaments are evenly distributed. Furthermore, it is crucial to ensure that the liquid is evenly distributed among the hollow fiber membranes to reduce the transmembrane pressure difference. Summary of the Invention

[0005] The purpose of this invention is to provide a shaping device, a shaping system, a hollow fiber membrane pad, and a hollow fiber membrane pad assembly to solve the problems of inconsistent fluid flow between the outer and inner membrane pads and large transmembrane pressure difference in existing hollow fiber membrane assemblies.

[0006] To solve the above-mentioned technical problems, the present invention provides a shaping device, which includes: a differential shaping module; the differential shaping module is used to drive the hollow fiber membrane pad to move along a first direction;

[0007] The differential speed shaping module includes: a differential roller group; the differential roller group includes two or more differential rollers arranged along a second direction, wherein the second direction is arranged at an angle to the first direction; the linear velocity of the two or more differential rollers arranged along the second direction changes in a sequentially increasing or sequentially decreasing trend.

[0008] Optionally, the differential speed shaping module further includes: a uniform speed roller group, wherein the uniform speed roller group is disposed on the downstream side of the corresponding differential speed roller group along the first direction;

[0009] The uniform speed roller assembly includes two or more uniform speed rollers arranged along the second direction; the two or more uniform speed rollers have the same linear velocity.

[0010] Optionally, the differential speed shaping module includes two or more differential roller groups and two or more uniform speed roller groups; the differential roller groups and the uniform speed roller groups are arranged in a corresponding and alternating manner.

[0011] Optionally, the number of uniform rollers in each uniform roller group is equal to the number of differential rollers in the corresponding differential roller group.

[0012] Optionally, the first direction is used to extend along the weft direction of the hollow fiber membrane pad, and the second direction is perpendicular to the first direction.

[0013] Optionally, the shaping equipment further includes a first heating module and a first shaping roller module, wherein the first heating module is disposed downstream of the differential shaping module along the first direction; and the first shaping roller module is disposed downstream of the first heating module along the first direction.

[0014] Optionally, the heating temperature of the first heating module is 50℃~90℃.

[0015] Optionally, the shaping device further includes a second heating module; the second heating module is disposed downstream of the first shaping roller module along the first direction.

[0016] Optionally, the heating temperature of the second heating module is lower than that of the first heating module.

[0017] Optionally, the heating temperature of the second heating module is 30℃~60℃.

[0018] To solve the above-mentioned technical problems, the present invention also provides a hollow fiber membrane pad, which includes membrane filaments and braided threads. After being processed by the shaping equipment according to any one of claims 1-10, the membrane filaments and braided threads are arranged at an oblique angle of 45° to 85°.

[0019] To solve the above-mentioned technical problems, the present invention also provides a shaping system, which includes at least two sets of shaping equipment as described above, wherein the differential rollers of at least two adjacent sets of shaping equipment have opposite trends in linear velocity along the second direction.

[0020] Optionally, the shaping system further includes a spray module, which is disposed downstream of the shaping device along the first direction.

[0021] Optionally, the shaping system further includes a second shaping roller module and a third heating module; the second shaping roller module is disposed downstream of the spray module along the first direction, and the third heating module is disposed downstream of the second shaping roller module along the first direction.

[0022] To solve the above-mentioned technical problems, the present invention also provides a hollow fiber membrane pad assembly, which is formed by pressing together at least two hollow fiber membrane pads as described above, wherein the at least two hollow fiber membrane pads are respectively processed by at least two sets of shaping equipment of the shaping system as described above; and the oblique arrangement directions of at least two adjacent hollow fiber membrane pads are opposite.

[0023] In summary, in the shaping equipment, shaping system, hollow fiber membrane pad, and hollow fiber membrane pad assembly provided by the present invention, the shaping equipment includes: a differential shaping module; the differential shaping module is used to drive the hollow fiber membrane pad to move along a first direction; the differential shaping module includes: a differential roller group; the differential roller group includes two or more differential rollers arranged along a second direction, wherein the second direction is arranged at an angle to the first direction; the linear velocity of the two or more differential rollers arranged along the second direction changes in a sequentially increasing or sequentially decreasing trend.

[0024] With this configuration, since the linear velocity of the two or more differential rollers along the second direction gradually changes, the hollow fiber membrane pads move at unequal speeds along the second direction under the drive of the differential shaping module. Therefore, they are stretched into an oblique direction. After shaping, the obliquely overlapping hollow fiber membrane pads overcome the problem of easy overlap of existing orthogonally overlapping hollow fiber membrane pads. The obliquely overlapping hollow fiber membrane pads are mainly in point contact, which can effectively solve the problems of inconsistent fluid between the outer and inner membrane pads, large transmembrane pressure difference, and easy adsorption of adhesive substances during the preparation of hollow fiber membrane modules. This increases the utilization rate of hollow fiber membrane pads, improves the performance of hollow fiber membrane modules, and extends the life of hollow fiber membrane modules. Attached Figure Description

[0025] Those skilled in the art will understand that the accompanying drawings are provided to better understand the invention and do not constitute any limitation on the scope of the invention. Wherein:

[0026] Figure 1 This is a schematic diagram of a hollow fiber membrane pad;

[0027] Figure 2 This is a schematic diagram of the differential speed shaping module according to an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the shaping equipment according to an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of a double-layered cross-laminated hollow fiber membrane pad according to an embodiment of the present invention.

[0030] In the attached image:

[0031] 01-Membranous filament; 02-Braided yarn;

[0032] 10-Differential shaping module; 11-Differential roller group; 110-Differential roller; 12-Uniform speed roller group; 120-Uniform speed roller; 21-First heating module; 22-First shaping roller pressing module; 23-Second heating module; 24-Spraying module; 31-Second shaping roller pressing module; 32-Third heating module; 41-Unwinding module; 42-Rewinding module. Detailed Implementation

[0033] To make the objectives, advantages, and features of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale, and are only used to facilitate and clarify the explanation of the embodiments of this invention. Furthermore, the structures shown in the drawings are often part of the actual structures. In particular, different figures may emphasize different aspects and may sometimes use different scales.

[0034] As used in this invention, the singular forms “a,” “an,” and “the” include plural objects; the term “or” is generally used to mean “and / or”; the term “a number” is generally used to mean “at least one”; and the term “at least two” is generally used to mean “two or more”. Furthermore, the terms “first,” “second,” and “third” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as “first,” “second,” or “third” may explicitly or implicitly include one or at least two of that feature. “One end” and “the other end,” as well as “proximal end” and “distal end,” generally refer to two corresponding parts, including not only endpoints. The terms “installed,” “connected,” and “joined” should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral part; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two elements or an interaction between two elements. Furthermore, as used in this invention, the phrase "one element is disposed on another element" generally only indicates that there is a connection, coupling, cooperation, or transmission relationship between the two elements, and the connection, coupling, cooperation, or transmission between the two elements can be direct or indirect through an intermediate element. It should not be construed as indicating or implying a spatial positional relationship between the two elements, i.e., one element can be located arbitrarily inside, outside, above, below, or to one side of the other element, unless otherwise explicitly stated. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] The purpose of this invention is to provide a shaping device, a shaping system, a hollow fiber membrane pad, and a hollow fiber membrane pad assembly to solve the problems of inconsistent fluid flow between the outer and inner membrane pads and large transmembrane pressure differential in existing hollow fiber membrane assemblies. The following description refers to the accompanying drawings.

[0036] The inventors discovered that existing hollow fiber membranes are generally hollow tubular bodies (hereinafter, a single hollow fiber membrane will be referred to as a membrane filament). In use, they are typically bundled into a bundle containing many membrane filaments. One end of the bundle is closed, forming a closed end, while the other end is bonded together with epoxy resin, forming an open end. The feed liquid enters the hollow cavity of each membrane filament from the open end under the action of a static pressure difference, and is filtered through the sidewalls of each membrane filament. Therefore, on the one hand, it is difficult to organize the membrane filaments within the fiber bundle, and unevenly organized membrane filaments will significantly affect the uniformity of the feed liquid distribution as it passes through the fiber bundle. This will affect the filtration efficiency and reduce the utilization rate of some membrane filaments (those with low feed liquid throughput), while some hollow fiber membranes will have their service life reduced due to overuse (those with high feed liquid throughput). On the other hand, since the open ends of the fiber bundles need to be bonded together with epoxy resin so that the feed liquid must flow through the hollow lumen of the membrane fibers, the epoxy resin may leak into the hollow lumen of the membrane fibers during bonding, reducing the utilization rate of some membrane fibers. Based on this, in some applications, multiple membrane fibers are made into hollow fiber membrane pads, and then the hollow fiber membrane pads are wound to form hollow fiber membrane modules, which can make the membrane fibers relatively uniformly distributed.

[0037] Please refer to Figure 1 , Figure 1 A hollow fiber membrane pad is shown, comprising warp-extended membrane filaments 01 and weft-extended braided yarns 02. This hollow fiber membrane pad is suitable for use in hollow fiber membrane modules in various liquid and gas filtration devices. Optionally, the membrane filaments 01 are made of one or more of polypropylene, polyethylene, polytetramethylisoprene, polyethersulfone, polysulfone, polyester, polytetrafluoroethylene, and polyvinylidene fluoride. The braided yarns 02 can be made of polypropylene, polyester, acrylic, nylon, or cotton yarn, and the fineness of the braided yarns 02 is between 10 and 100D.

[0038] However, the inventors discovered that using methods such as Figure 1 After the hollow fiber membrane pad shown is wound, because the membrane filaments 01 are orthogonally overlapped, the membrane filaments 01 between the outer membrane pad and the inner membrane pad are prone to overlap, resulting in inconsistent fluid flow between the outer membrane pad and the inner membrane pad, large transmembrane pressure difference, and easy adsorption of adhesive substances. This makes it easy for filtered substances such as plasma to be adsorbed on the membrane surface, which is not conducive to improving the efficiency of the hollow fiber membrane module.

[0039] Based on the above research, the inventors discovered that if the hollow fiber membrane pads can be changed from orthogonal overlapping to oblique overlapping, the problem of easy overlap of membrane fibers 01 between the outer and inner membrane pads of the hollow fiber membrane pads can be effectively overcome.

[0040] Based on this, please refer to Figure 2 and Figure 3 This embodiment provides a shaping device, which includes: a differential shaping module 10; the differential shaping module 10 is used to drive a hollow fiber membrane pad to move along a first direction O1; the differential shaping module 10 includes: a differential roller group 11; the differential roller group 11 includes two or more differential rollers 110 arranged along a second direction O2, wherein the second direction O2 is arranged at an angle to the first direction O1; the linear velocity of the two or more differential rollers 110 arranged along the second direction O2 changes in a sequentially increasing or sequentially decreasing trend.

[0041] When the differential roller 110 rotates, its outer peripheral surface contacts the hollow fiber membrane pad and drives the hollow fiber membrane pad forward through friction. The moving speed of the hollow fiber membrane pad is equal to the linear velocity of the outer periphery of the differential roller 110. In an alternative example, the rotation axis of the differential roller 110 is perpendicular to the first direction O1, thereby driving the hollow fiber membrane pad to move along the first direction O1. Optionally, the differential roller 110 includes two sub-rollers that clamp the hollow fiber membrane pad relative to each other. The distance between the two sub-rollers is adapted to the thickness of the hollow fiber membrane pad (e.g., slightly less than the thickness of the hollow fiber membrane pad), and the two sub-rollers rotate in opposite directions, thereby enabling the two sub-rollers to clamp and drive the hollow fiber membrane pad forward.

[0042] Optionally, the first direction O1 extends along the weft direction of the hollow fiber membrane pad, meaning that when the hollow fiber membrane pad is driven to move by the differential rollers 110, the weft braided yarns 02 are parallel to the first direction O1. Since the linear velocity of the differential rollers 110 arranged along the second direction O2 changes gradually, either increasing or decreasing sequentially, the hollow fiber membrane pad moves at different speeds along the warp direction. That is, the hollow fiber membrane pad is obliquely pulled forward by the differential roller assembly 11, causing the membrane filaments 01 and braided yarns 02 to no longer be orthogonally arranged after passing the differential roller assembly 11, but rather to form an oblique arrangement, thus giving the hollow fiber membrane pad a roughly parallelogram shape. Figure 4 As shown. Preferably, the second direction O2 is perpendicular to the first direction O1. Thus, while the differential shaping module 10 drives the hollow fiber membrane pad to move along the first direction O1, the membrane filaments 01 and braided threads 02 of the hollow fiber membrane pad gradually arrange themselves at an oblique angle.

[0043] Furthermore, after shaping, the hollow fiber membrane pads can form oblique overlaps during winding. The obliquely overlapping hollow fiber membrane pads overcome the problem of easy overlap of existing orthogonally overlapping hollow fiber membrane pads. The obliquely overlapping hollow fiber membrane pads are mainly in point contact, which can effectively solve problems such as inconsistent fluid between the outer and inner membrane pads, large transmembrane pressure difference, and easy adsorption of adhesive substances during the preparation of hollow fiber membrane modules. This increases the utilization rate of hollow fiber membrane pads, improves the performance of hollow fiber membrane modules, and extends the life of hollow fiber membrane modules.

[0044] Furthermore, the differential shaping module 10 also includes a uniform speed roller group 12, which is disposed downstream of the corresponding differential speed roller group 11 along the first direction O1. Here, "downstream" means that, along the moving direction of the hollow fiber membrane pad driven by the differential speed roller group 11 (i.e., the first direction O1), the uniform speed roller group 12 is located downstream of the differential speed roller group 11. When the hollow fiber membrane pad moves, it first passes the differential speed roller group 11 and then the uniform speed roller group 12. The definition of "downstream" for other components in the following text can also be understood by referring to the definition of the uniform speed roller group 12 being disposed downstream of the corresponding differential speed roller group 11 along the first direction O1. The uniform speed roller group 12 includes two or more uniform speed rollers 120 arranged along the second direction O2; the two or more uniform speed rollers 120 have the same linear velocity. It should be noted that the uniform speed roller group 12 is set on the downstream side of the corresponding differential speed roller group 11. This does not mean that the downstream side of each differential speed roller group 11 must be set with a corresponding uniform speed roller group 12. Those skilled in the art can select the number and position of the uniform speed roller group 12 according to the actual situation. However, each uniform speed roller group 12 should be set on the downstream side of a corresponding differential speed roller group 11.

[0045] In one example, in a uniform-speed roller group 12, the structure, shape, and arrangement of the uniform-speed rollers 120 are the same as those of the differential-speed rollers 110 in the corresponding differential-speed roller group 11. The only difference is that the linear velocities of the uniform-speed rollers 120 arranged along the second direction O2 are the same. Therefore, after the hollow fiber membrane mat passes through the uniform-speed roller group 12, the arrangement angle between the membrane filaments 01 and the braided threads 02 will not change, maintaining the state it had after passing through the differential-speed roller group 11. The inventors discovered that simply using the differential-speed roller group 11 to drive the hollow fiber membrane mat results in a certain torsional tension after passing through it, which is detrimental to its shaping. However, by setting the uniform-speed roller group 12 downstream of the differential-speed roller group 11, the torsional tension of the hollow fiber membrane mat can be reduced. Furthermore, the number of uniform rollers 120 in each uniform roller group 12 is equal to the number of differential rollers 110 in the differential roller group 11 corresponding to the uniform roller group 12, so as to more evenly reduce the torsional tension of the hollow fiber membrane pad.

[0046] Optionally, the differential shaping module 10 includes two or more differential roller groups 11 and two or more uniform roller groups 12; the differential roller groups 11 and the uniform roller groups 12 are correspondingly arranged and alternately, that is, a corresponding uniform roller group 12 is arranged downstream of each differential roller group 11, and the differential roller groups 11 and uniform roller groups 12 are in one-to-one correspondence. The inventors have found that when using only one set of differential roller groups 11 and uniform roller groups 12 to pull the hollow fiber membrane pad in one step, the linear velocity of the differential rollers 110 in the differential roller group 11 is relatively large, and the hollow fiber membrane pad is easily pulled and twisted. Conversely, if two or more sets of differential roller groups 11 and uniform roller groups 12 are used to gradually stretch the hollow fiber membrane pad, the hollow fiber membrane pad can be gradually stretched and shaped. Its torsional tension is decomposed and absorbed by the two or more sets of differential roller groups 11 and uniform roller groups 12, which helps to reduce the torsional tension of the hollow fiber membrane pad after passing through the differential shaping module 10, resulting in a smoother surface. Please refer to [reference needed]. Figure 2 In one example, the differential shaping module 10 includes three differential roller groups 11 and three uniform roller groups 12, with the differential roller groups 11 and uniform roller groups 12 arranged alternately. It is understood that those skilled in the art can reasonably set the linear speeds of the differential rollers 110 and uniform rollers 120 according to the different sizes and requirements of the hollow fiber membrane mat. Preferably, after passing through the differential shaping module 10, the angle between the membrane filaments 01 and the braided threads 02 of the hollow fiber membrane mat is between 45° and 85°.

[0047] Please refer to Figure 3 Optionally, the shaping device further includes a first heating module 21, which is disposed downstream of the differential shaping module 10 along the first direction O1. In one example, the first heating module 21 includes a thermal radiation heating component for heat-treating the hollow fiber membrane pad after it has been stretched into an angle by the differential shaping module 10. The shaping temperature can be selected as 50°C to 90°C to release the torsional tension of the hollow fiber membrane pad and to heat-shape the hollow fiber membrane pad.

[0048] Furthermore, the shaping equipment also includes a first shaping roller pressing module 22; the first shaping roller pressing module 22 is disposed downstream of the first heating module 21 along the first direction O1. In an alternative example, the first shaping roller pressing module 22 includes a plurality of uniform speed roller groups 12, wherein the structure of the uniform speed roller groups 12 may be the same as or different from the structure of the uniform speed roller groups 12 in the aforementioned differential speed shaping module 10, and this embodiment is not limited thereto. The first shaping roller pressing module 22 is mainly used to shape and press the hollow fiber membrane pads after heat shaping treatment by the first heating module 21, and to prevent cross-overlap between the hollow fiber membrane pads by improving the flatness of the hollow fiber membrane pads.

[0049] Furthermore, the shaping device also includes a second heating module 23, which is disposed downstream of the first shaping roller pressing module 22 along the first direction O1. The structure of the second heating module 23 may be the same as or different from that of the aforementioned first heating module 21; this embodiment is not limited in this respect. The second heating module 23 is used to heat-shape the hollow fiber membrane pad after it has been rolled by the first shaping roller pressing module 22. Optionally, the shaping temperature of the second heating module 23 is lower than that of the first heating module 22; for example, the shaping temperature of the second heating module 23 is 30°C to 60°C.

[0050] Based on the shaping equipment described above, this embodiment provides a hollow fiber membrane mat, which includes membrane filaments 01 and braided threads 02. Optionally, after processing by the shaping equipment, the membrane filaments 01 and braided threads 02 are arranged at an oblique angle; preferably, after processing by the shaping equipment, the membrane filaments 01 and braided threads 02 of the hollow fiber membrane mat are arranged at an oblique angle of 45° to 85°.

[0051] Please refer to Figure 3 and Figure 4 This invention also provides a shaping system, comprising at least two shaping devices as described above, wherein the linear velocity trends of the differential rollers 110 along the second direction O2 of at least two adjacent shaping devices are opposite. It should be noted that the opposite trends in linear velocity along the second direction O2 mean that if the linear velocity of each differential roller 110 of the differential shaping module 10 of one shaping device gradually increases along the second direction O2, then the linear velocity of each differential roller 110 of the differential shaping module 10 of the other shaping device gradually decreases along the same second direction O2. This allows the two hollow fiber membrane pads to be pulled in opposite directions after passing through the two differential shaping modules 10, forming an oblique arrangement structure with opposite angles, such as... Figure 4 As shown. In some applications, the double-layered hollow fiber membrane pads with opposite diagonal orientations are arranged in a cross pattern. The double-layered hollow fiber membrane pads are mainly in point contact with each other, which further reduces the overlap between the hollow fiber membrane pads.

[0052] Furthermore, the shaping system also includes a spray module 24, which is disposed downstream of the shaping device along the first direction O1, for example, downstream of the second heating module 23. The spray module 24 is used to shape the pores of the hollow fiber membrane pad. In one example, the liquid used for spraying by the spray module 24 may be a surfactant, such as an aqueous solution of glycerol (glycerol mass fraction of 15% to 60%) or an aqueous solution of sodium dodecyl sulfate (sodium dodecyl sulfate mass fraction of 0.5% to 5%).

[0053] Optionally, corresponding to the differential setting module 10 of the two setting devices, the setting system may include two first heating modules 21, two first setting roller pressing modules 22, two second heating modules 23, and two spraying modules 24.

[0054] Preferably, the shaping system further includes a second shaping roller pressing module 31 and a third heating module 32; the second shaping roller pressing module 31 is disposed downstream of the spraying module 24 along the first direction O1, and the third heating module 32 is disposed downstream of the second shaping roller pressing module 31 along the first direction O1. The structure of the second shaping roller pressing module 31 is roughly the same as that of the first shaping roller pressing module 22, and it is used to roll and shape the sprayed hollow fiber membrane pads. The structure of the third heating module 32 is roughly the same as that of the first heating module 21, and it is used to dry the hollow fiber membrane pads after being rolled and shaped by the second shaping roller pressing module 31. The second shaping roller pressing module 31 is also used to press two hollow fiber membrane pads with opposite oblique arrangement directions to form a cross-arranged double-layer membrane pad.

[0055] Furthermore, the present invention also provides a hollow fiber membrane pad assembly, which is formed by pressing together at least two hollow fiber membrane pads as described above, wherein the at least two hollow fiber membrane pads are respectively processed by at least two sets of shaping equipment of the shaping system as described above; and the oblique arrangement directions of at least two adjacent hollow fiber membrane pads are opposite.

[0056] Optionally, the shaping system further includes an unwinding module 41 and a winding module 42, which are used to unwind the hollow fiber membrane pad and wind up the hollow fiber membrane pad, respectively. The specific structure and principle of the unwinding module 41 and the winding module 42 can be referred to the prior art, and will not be elaborated in this embodiment.

[0057] In summary, in the shaping equipment, shaping system, hollow fiber membrane pad, and hollow fiber membrane pad assembly provided by the present invention, the shaping equipment includes: a differential shaping module; the differential shaping module is used to drive the hollow fiber membrane pad to move along a first direction; the differential shaping module includes: a differential roller group; the differential roller group includes two or more differential rollers arranged along a second direction, wherein the second direction is arranged at an angle to the first direction; the linear velocity of the two or more differential rollers arranged along the second direction changes in a sequentially increasing or sequentially decreasing trend.

[0058] With this configuration, since the linear velocity of the two or more differential rollers along the second direction gradually changes, the hollow fiber membrane pads move at unequal speeds along the second direction under the drive of the differential shaping module. Therefore, they are stretched into an oblique direction. After shaping, the obliquely overlapping hollow fiber membrane pads overcome the problem of easy overlap of existing orthogonally overlapping hollow fiber membrane pads. The obliquely overlapping hollow fiber membrane pads are mainly in point contact, which can effectively solve the problems of inconsistent fluid between the outer and inner membrane pads, large transmembrane pressure difference, and easy adsorption of adhesive substances during the preparation of hollow fiber membrane modules. This increases the utilization rate of hollow fiber membrane pads, improves the performance of hollow fiber membrane modules, and extends the life of hollow fiber membrane modules.

[0059] It should be noted that the above embodiments can be combined with each other. The above description is only a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A shaping device, characterized in that, include: Differential speed control module; The differential shaping module is used to drive the hollow fiber membrane pad to move along the first direction; The differential speed shaping module includes: a differential roller group; the differential roller group includes two or more differential rollers arranged along a second direction, wherein the second direction is arranged at an angle to the first direction; the linear velocity of the two or more differential rollers arranged along the second direction changes in a sequentially increasing or sequentially decreasing trend. The differential speed shaping module further includes: a uniform speed roller group, which is arranged along the first direction on the downstream side of the corresponding differential speed roller group; the uniform speed roller group includes two or more uniform speed rollers arranged along the second direction; the two or more uniform speed rollers have the same linear velocity; The first direction is used to extend along the latitudinal direction of the hollow fiber membrane pad, and the second direction is perpendicular to the first direction.

2. The shaping equipment according to claim 1, characterized in that, The differential speed shaping module includes two or more differential roller groups and two or more uniform speed roller groups; the differential roller groups and the uniform speed roller groups are arranged in a corresponding and alternating manner.

3. The shaping equipment according to claim 1, characterized in that, The number of uniform rollers in each uniform roller group is equal to the number of differential rollers in the corresponding differential roller group.

4. The shaping equipment according to claim 1, characterized in that, The shaping equipment further includes a first heating module and a first shaping roller module. The first heating module is disposed downstream of the differential shaping module along the first direction. The first shaping roller module is disposed downstream of the first heating module along the first direction.

5. The shaping equipment according to claim 4, characterized in that, The heating temperature of the first heating module is 50℃~90℃.

6. The shaping equipment according to claim 4, characterized in that, The shaping equipment further includes a second heating module; the second heating module is disposed downstream of the first shaping roller module along the first direction.

7. The shaping equipment according to claim 6, characterized in that, The heating temperature of the second heating module is lower than that of the first heating module.

8. The shaping equipment according to claim 6, characterized in that, The heating temperature of the second heating module is 30℃~60℃.

9. A shaping system, characterized in that, It includes at least two sets of shaping equipment as described in any one of claims 1-8, wherein the linear velocity of the differential rollers of at least two adjacent sets of shaping equipment varies in opposite directions along the second direction.

10. The shaping system according to claim 9, characterized in that, The shaping system further includes a spray module, which is disposed downstream of the shaping equipment along the first direction.

11. The shaping system according to claim 10, characterized in that, The shaping system further includes a second shaping roller pressing module and a third heating module; the second shaping roller pressing module is disposed downstream of the spraying module along the first direction, and the third heating module is disposed downstream of the second shaping roller pressing module along the first direction.

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