Hollow fiber membrane module, braided mat and method of braiding thereof

Abstract

This invention relates to a hollow fiber membrane assembly, a woven mat, and a weaving method thereof. The hollow fiber membrane woven mat includes multiple hollow fiber membranes and multiple weaving threads. The multiple hollow fiber membranes are arranged sequentially at intervals along the extension direction of the weaving threads, and the hollow fiber membranes are arranged in a bent shape, forming a bent gap between adjacent hollow fiber membranes. The spacing of the gaps may be the same or different. The multiple weaving threads are arranged at intervals along the length direction of the hollow fiber membranes and are respectively wound around each hollow fiber membrane, so that the hollow fiber membranes are woven into a whole. The hollow fiber membranes of adjacent layers are separated from each other to form gaps, avoiding overlap and blockage. Liquid or gas flows uniformly through the gaps between the hollow fiber membranes. During the gas-liquid mixing process, the gas flows in the channels of the hollow fiber membranes, and the liquid flows in the gaps between the hollow fibers. The bent shape of the hollow fiber membranes and the bent gaps effectively prolong the gas-liquid mixing time.

Description

Technical Field

[0001] This invention relates to the field of hollow fiber membrane manufacturing technology, and in particular to a hollow fiber membrane module, a woven mat, and a weaving method thereof. Background Technology

[0002] Hollow fiber membranes, with their micropores in the tube wall and selective permeation characteristics, are used in specialized fields such as water treatment filters, artificial kidneys, and artificial lungs. After the hollow fiber membrane is fabricated, it needs to be used to prepare modules. Traditionally fabricated hollow fiber membrane modules suffer from uneven hydrodynamic distribution, low membrane utilization, poor filtration efficiency, and are prone to clogging after prolonged use. This is particularly problematic in the medical field, leading to short module lifespans and, in artificial lung applications, causing adverse effects such as plasma leakage. Summary of the Invention

[0003] Therefore, it is necessary to address the problem of easy clogging in traditional hollow fiber membrane modules by providing a hollow fiber membrane module, a woven pad, and its weaving method, which allows for more uniform flow of the medium through the channel and reduces the likelihood of clogging.

[0004] A hollow fiber membrane woven mat includes multiple hollow fiber membranes and multiple braiding threads; the multiple hollow fiber membranes are arranged sequentially at intervals along the extension direction of the braiding threads, the hollow fiber membranes are arranged in a bent shape, and a bent gap is formed between two adjacent hollow fiber membranes, the spacing of the gaps may be the same or different;

[0005] Multiple braiding threads are arranged at intervals along the length of the hollow fiber membrane and are wound onto each hollow fiber membrane, so that the hollow fiber membranes are woven into one piece.

[0006] In one embodiment, the hollow fiber membrane includes a plurality of alternating first folds and second folds, wherein the included angle between the first folds and the second folds is α, and 90°≤α<180°.

[0007] The first fold and the second fold have different bending directions relative to the central axis of the hollow fiber membrane; the central axis is perpendicular to the extension direction of the braided thread;

[0008] Alternatively, the first fold is bent in the same direction relative to the central axis of the hollow fiber membrane, and the second fold is parallel to the central axis of the hollow fiber membrane;

[0009] Alternatively, the first fold may be bent alternately in different directions relative to the central axis of the hollow fiber membrane, and the second fold may be parallel to the central axis of the hollow fiber membrane.

[0010] In one embodiment, the hollow fiber membrane is connected to an adjacent hollow fiber membrane at the same location by two braided threads interlaced together.

[0011] In one embodiment, the braided yarn is wound around the bend of the hollow fiber membrane.

[0012] A hollow fiber membrane module includes at least two layers of hollow fiber membrane woven pads stacked together, wherein at least one layer has a structure using the hollow fiber membrane woven pads.

[0013] In one embodiment, one layer of the at least two hollow fiber membrane woven pad has the following characteristics: the hollow fiber membranes are arranged longitudinally or laterally and a straight gap is formed between adjacent hollow fiber membranes, and the spacing of the gaps may be the same or different.

[0014] In one embodiment, one layer of the at least two-layer hollow fiber membrane woven pad has the following characteristics: the hollow fiber membrane woven pad also adopts the hollow fiber membrane woven pad described above; the bending directions of the hollow fiber membranes of adjacent upper and lower hollow fiber membrane woven pads are different, or the bending directions of the hollow fiber membranes of adjacent upper and lower hollow fiber membrane woven pads are the same and staggered.

[0015] In one embodiment, the hollow fiber membrane is made of one or more of polypropylene, polyethylene, polytetramethylisoprene, polyethersulfone, polysulfone, polyester, polytetrafluoroethylene, and polyvinylidene fluoride.

[0016] And / or, the braided yarn is made of polypropylene, polyester, acrylic, nylon or cotton yarn, and the braided yarn is 10D-100D.

[0017] A method for manufacturing a hollow fiber membrane woven mat.

[0018] Hollow fiber membrane is used as the warp, and the hollow fiber membrane is bent.

[0019] A woven mat is formed by weaving two intersecting braided threads as weft threads, and a bent gap is formed between adjacent hollow fiber membranes in the woven mat;

[0020] or,

[0021] Hollow fiber membrane is used as the weft thread, and the hollow fiber membrane is bent.

[0022] Two intersecting braided threads are used as warp threads to form a braided mat, and a bent gap is formed between adjacent hollow fiber membranes in the braided mat.

[0023] The aforementioned hollow fiber membrane module, woven pad, and weaving method involve bending the hollow fiber membrane and weaving it into a pad using braided threads. Bending gaps are formed between adjacent hollow fiber membranes. Using this hollow fiber membrane woven pad, a multi-layered hollow fiber membrane module is prepared. Because the hollow fiber membrane is bent, the adjacent layers of the hollow fiber membrane module are separated by gaps, avoiding overlap and blockage. Liquid or gas flows uniformly through the gaps between the hollow fiber membranes. Furthermore, during gas-liquid mixing, the gas flows within the channels of the hollow fiber membrane, while the liquid flows within the gaps between the hollow fibers. The bent shape of the hollow fiber membrane and the bending gaps effectively extend the gas-liquid mixing time, which is particularly valuable in the field of artificial lungs, preventing plasma leakage and improving the module's service life. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the hollow fiber membrane woven mat of Embodiment 1 of this application;

[0025] Figure 2 for Figure 1 A schematic diagram of the structure of the braided yarn and the hollow fiber membrane;

[0026] Figure 3 This is a schematic diagram of the hollow fiber membrane woven mat of Embodiment 2 of this application;

[0027] Figure 4 This is a schematic diagram of the hollow fiber membrane woven mat of Embodiment 3 of this application;

[0028] Figure 5 This is a schematic diagram of the hollow fiber membrane woven mat of Embodiment 4 of this application;

[0029] Figure 6 This is a schematic diagram of the hollow fiber membrane woven mat of Embodiment 5 of this application;

[0030] Figure 7 This is a schematic diagram of the hollow fiber membrane woven mat of Embodiment Six of this application;

[0031] Figure 8 This is a schematic diagram of the second hollow fiber membrane pad of a hollow fiber membrane assembly according to an embodiment of this application;

[0032] Figure 9 This is a schematic diagram of the second hollow fiber membrane pad of a hollow fiber membrane assembly according to another embodiment of this application;

[0033] Figure 10 This is a schematic diagram of a hollow fiber membrane module according to an embodiment of this application;

[0034] Figure 11 for Figure 10 A cross-sectional schematic diagram.

[0035] Explanation of icon numbers:

[0036] 10. Hollow fiber membrane woven mat; 110. Hollow fiber membrane; 112. First fold; 114. Second fold; 120. Braided thread; 20. Second type of hollow fiber membrane mat; 210. Hollow fiber membrane; 220. Braided thread. Detailed Implementation

[0037] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0043] Reference Figure 1-7 This application provides a hollow fiber membrane woven mat 10, comprising multiple hollow fiber membranes 110 and multiple braiding threads 120. The multiple hollow fiber membranes 110 are arranged sequentially at intervals along the extension direction of the braiding threads 120. The hollow fiber membranes 110 are arranged in a bent shape, with a bent gap formed between adjacent hollow fiber membranes 110. The spacing of the gaps may be the same or different. The multiple braiding threads 120 are arranged at intervals along the length direction of the hollow fiber membranes 110 and are respectively wound around each hollow fiber membrane 110, so that the hollow fiber membranes 110 are woven into a whole. Preferably, the bending direction of all hollow fiber membranes 110 is consistent.

[0044] Furthermore, in one embodiment, such as Figure 1-7As shown, the hollow fiber membrane 110 includes a plurality of alternately arranged first folds 112 and second folds 114. The included angle between the first fold 112 and the second fold 114 is α, where 90° ≤ α < 180°; further, 120° ≤ α ≤ 150°. The size of the included angle α reflects the degree of bending of the hollow fiber membrane 110. Optionally, the first fold 112 is bent at 45° toward the braided thread 120, and the second fold 114 is bent at 45° toward the braided thread 120, with the included angle α being 90°. In other embodiments, the first fold 112 is bent at 30° toward the braided thread 120, and the second fold 114 is bent at 30° toward the braided thread 120, with the included angle α being 120°. Setting the included angle α between 90° and 180° allows the hollow fiber membrane 110 to present a suitable bending angle, ensuring that a suitable gap is formed between adjacent hollow fiber membranes 110 so that the medium can pass through the gap evenly and avoid blockage, while also ensuring smooth flow in the internal channels of the hollow fiber membrane 110.

[0045] Reference Figure 1 In Embodiment 1 of this application, a hollow fiber membrane woven mat 10 is provided, wherein the first fold 112 and the second fold 114 have different bending directions relative to the central axis b of the hollow fiber membrane 110, and the central axis b is perpendicular to or substantially perpendicular to the extension direction of the woven thread 120. For example, they are both on the right side of the central axis, respectively biased towards the upper right and lower right. In this embodiment, the hollow fiber membrane 110 is bent into a sawtooth structure, and a gap of sawtooth structure is formed between adjacent hollow fiber membranes 110. The medium flows through the gap in a detour, increasing the flow distance.

[0046] Reference Figure 2 In this embodiment, adjacent hollow fiber membranes 110 are connected by two intersecting braided threads 120, maintaining a predetermined gap between them. The extension direction of the braided threads 120 is perpendicular to or substantially perpendicular to the central axis. In other embodiments, the hollow fiber membranes 110 can be connected by other braided threads 120, such as a single-thread interlocking type.

[0047] Reference Figure 3 Embodiment 2 of this application provides a hollow fiber membrane woven mat 10, in which the first fold 112 and the second fold 114 are bent in different directions relative to the central axis b of the hollow fiber membrane 110, for example, both on the left side of the central axis, respectively biased towards the upper left and lower left. The difference from Embodiment 1 is that the bending directions of the first fold 112 and the second fold 114 in this embodiment are opposite to those in Embodiment 1. In this embodiment, the hollow fiber membrane 110 is bent into a sawtooth structure, and gaps in the sawtooth structure are formed between adjacent hollow fiber membranes 110, allowing the medium to flow through these gaps in a meandering manner, increasing the flow distance.

[0048] Reference Figure 4 In Embodiment 3 of this application, a hollow fiber membrane woven mat 10 is provided, wherein the first fold 112 of the mat is bent in the same direction relative to the central axis of the hollow fiber membrane 110, specifically, bent towards the upper left or lower right of the central axis. The second fold 114 is parallel to the central axis of the hollow fiber membrane 110. In this embodiment, the hollow fiber membrane 110 is bent into a stepped structure, and gaps similar to a stepped structure are formed between adjacent hollow fiber membranes 110. The medium flows smoothly through the gaps, increasing the flow distance, and the medium flows smoothly within the hollow fiber membrane 110.

[0049] Reference Figure 5 Embodiment 4 of this application provides a hollow fiber membrane woven mat 10, in which the first fold 112 is bent in the same direction relative to the central axis of the hollow fiber membrane 110, specifically bent to the upper right or lower left of the central axis, and the second fold 114 is parallel to the central axis of the hollow fiber membrane 110. The difference from Embodiment 3 is that the bending direction of the first fold 112 in this embodiment is opposite to that in Embodiment 3. In this embodiment, the hollow fiber membrane 110 is bent into a stepped structure, and gaps similar to a stepped structure are formed between adjacent hollow fiber membranes 110. The medium flows smoothly through the gaps, increasing the flow distance, and the medium flows smoothly within the hollow fiber membrane 110.

[0050] Reference Figure 6 Embodiment 5 of this application provides a hollow fiber membrane woven mat 10, in which the first fold 112 is alternately bent in different directions relative to the central axis of the hollow fiber membrane 110. Specifically, it is bent alternately to the upper left and lower left of the central axis, or alternately bent to the upper right and lower right of the central axis. The second fold 114 is parallel to the central axis of the hollow fiber membrane 110. In this embodiment, the hollow fiber membrane 110 is bent into a similar S-shaped structure, and a similar S-shaped gap is formed between adjacent hollow fiber membranes 110. The medium flows smoothly and meanderingly through the gap, increasing the flow distance, and the medium flows smoothly within the hollow fiber membrane 110.

[0051] Reference Figure 7This application provides a hollow fiber membrane woven mat 10 in Embodiment Six, wherein the first fold 112 is alternately bent in different directions relative to the central axis of the hollow fiber membrane 110, specifically, it is bent alternately to the upper right and lower right of the central axis, or alternately bent to the upper left and lower left of the central axis. The second fold 114 is parallel to the central axis of the hollow fiber membrane 110. The difference from Embodiment Five is that the bending direction of the first fold 112 in this embodiment is correspondingly opposite to that in Embodiment Five. In this embodiment, the hollow fiber membrane 110 is bent into a similar S-shaped structure, and a similar S-shaped gap is formed between adjacent hollow fiber membranes 110. The medium flows smoothly and meanderingly through the gap, increasing the flow distance, and the medium flows smoothly within the hollow fiber membrane 110.

[0052] Reference Figure 2 In the above embodiment, the hollow fiber membrane 110 is connected to adjacent hollow fiber membranes 110 at the same location by two cross-wound braided threads 120. In other words, adjacent hollow fiber membranes 110 are connected by two cross-wound braided threads 120, maintaining a predetermined gap between them. Specifically, at the same location of the hollow fiber membrane 110, two braided threads 120 are wound once from opposite directions, thereby fixing and binding the hollow fiber membrane 110. Multiple hollow fiber membranes 110 are spaced apart in this way, and the gaps can be the same or different. In other embodiments, the hollow fiber membranes 110 can be connected by other braided threads 120, such as a single-thread locking type.

[0053] Furthermore, refer to Figures 1-7 In one embodiment, the braided thread 120 is wound around the bent portion of the hollow fiber membrane 110, keeping the hollow fiber membrane 110 in a bent state and maintaining a predetermined gap between the hollow fiber membranes 110. In other embodiments, the braided thread 120 may also be wound around the straight portion of the hollow fiber membrane 110.

[0054] Reference Figure 8 In one embodiment, the hollow fiber membrane 210 of the second type of hollow fiber membrane pad 20 is arranged longitudinally, and a straight gap is formed between adjacent hollow fiber membranes 210. In this embodiment, the braided thread 220 is perpendicular to or at a certain angle to the extension direction of the hollow fiber membrane 210.

[0055] Reference Figure 9 In another embodiment, the hollow fiber membrane 210 of the second type of hollow fiber membrane pad 20 is arranged laterally, and a straight gap is formed between adjacent hollow fiber membranes 210. In this embodiment, the braided thread 220 is perpendicular to or at a certain angle to the extending direction of the hollow fiber membrane 210.

[0056] In order to improve the service life of hollow fiber membrane modules, the hollow fiber membrane 110 needs to be sorted before the membrane module is cast. Therefore, the above-mentioned weaving of the hollow fiber membrane 110 is particularly critical. The sorted hollow fiber membrane woven pad is rolled, laid flat or otherwise encapsulated into the membrane module.

[0057] This application provides a hollow fiber membrane module, comprising at least two layers of hollow fiber membrane woven pads stacked together, wherein the structure of at least one layer is selected from the above-mentioned... Figure 1-7 Any of the hollow fiber membrane woven mats 10 shown. In one embodiment, the other hollow fiber membrane woven mat is selected from the above-described... Figure 8 or Figure 9 The second type of hollow fiber membrane pad 20 is shown.

[0058] Specifically, as an example, in Figure 10 , Figure 11 In the middle, is Figure 1 The hollow fiber membrane woven pad 10 shown is Figure 8 The second type of hollow fiber membrane pad shown is composed of 20 layers stacked together. For example... Figure 11 As shown, in the prepared hollow fiber membrane module, the hollow fiber membrane woven pad 10 includes multiple hollow fiber membranes 110 spaced apart, and the second type of hollow fiber membrane pad 20 includes multiple hollow fiber membranes 210 spaced apart. The hollow fiber membranes 110 and 210 of adjacent layers are separated to form gaps, preventing overlap and blockage. Liquid or gas flows uniformly through the gaps between the hollow fiber membranes 110, between the intermediate fiber membranes 210, and between the hollow fiber membranes 110 and 210. Furthermore, during gas-liquid mixing, gas flows within the channels of the hollow fiber membranes 110 and 210, while liquid flows uniformly through the gaps between the hollow fiber membranes 110, between the intermediate fiber membranes 210, and between the hollow fiber membranes 110 and 210. The bent arrangement of the hollow fiber membranes 110 and the bent gaps effectively prolongs the gas-liquid mixing time, which is particularly valuable in the field of artificial lungs, preventing plasma leakage and improving the module's service life.

[0059] In other embodiments, the other hollow fiber membrane woven pad of the hollow fiber membrane module is also selected from the above-mentioned materials. Figure 1-7 The hollow fiber membrane woven mat 10 shown in any of the embodiments one to six. The hollow fiber membrane 110 of adjacent upper and lower layers of the hollow fiber membrane woven mat 10 have different bending directions. For example, one layer uses Figure 1 The hollow fiber membrane woven pad 10 in the middle, the other layer can be made of Figure 3-9 Any woven mat with any of the following structures. Or one of the layers uses... Figure 3 The hollow fiber membrane woven pad 10 in the middle, the other layer can be made of Figure 1 ,4 -A braided pad with any of the following structures. Or one of the layers uses... Figure 4 The hollow fiber membrane woven pad 10 in the middle, the other layer can be made of Figure 1 , 3 Woven mats with any of the structures in 5-9. Or one of the layers uses... Figure 5 The hollow fiber membrane woven pad 10 in the middle, the other layer can be made of Figure 1 , 3 Woven mats with any of the structures described in 4, 6-9. Or one of the layers may use... Figure 6 The hollow fiber membrane woven pad 10 in the middle, the other layer can be made of Figure 1 , 3 Woven mats with any of the following structures: 4, 5, 7-9. Or one layer may use... Figure 7 The hollow fiber membrane woven pad 10 in the middle, the other layer can be made of Figure 1 , 3 -A braided pad with any of the structures in -6, 8, and 9. In other embodiments, the hollow fiber membranes 110 of adjacent upper and lower layers of the hollow fiber membrane braided pad 10 have the same bending direction. For example, the same type of hollow fiber membrane braided pad 10 can be used, as long as the hollow fiber membranes 110 of adjacent layers of the component are staggered. Both layers of hollow fiber membrane braided pad 10 have hollow fiber membranes 110 that are bent. The hollow fiber membranes 110 of adjacent layers of the hollow fiber membrane component are separated from each other to form gaps, avoiding overlap and blockage. Liquid or gas flows evenly through the gaps between the hollow fiber membranes 110. The bent hollow fiber membranes 110 and the bent gaps effectively prolong the mixing time of gas and liquid, which is especially valuable in the field of artificial lungs, preventing plasma leakage and improving the service life of the component.

[0060] Optionally, in one embodiment, the hollow fiber membrane is made of one or more of polypropylene, polyethylene, polytetramethylisoprene, polyethersulfone, polysulfone, polyester, polytetrafluoroethylene, and polyvinylidene fluoride. Optionally, the braided yarn 120 is made of polypropylene, polyester, acrylic, nylon, or cotton yarn, and the braided yarn 120 has a denier of 10D-100D.

[0061] Reference Figure 1-9This application provides a method for manufacturing a hollow fiber membrane woven mat, wherein a hollow fiber membrane 110 is used as the warp and is bent; two intersecting braided threads 120 are used as the weft to form a woven mat, and a bent gap is formed between adjacent hollow fiber membranes 110. In other embodiments, a hollow fiber membrane 110 is used as the weft and is bent; two intersecting braided threads 120 are used as the warp to form a woven mat, and a bent gap is formed between adjacent hollow fiber membranes 110. A clamp can be used to bend the hollow fiber membrane 110, and a braiding machine can be used to intersect the braided threads 120 between the hollow fiber membranes 110, so that the hollow fiber membranes 110 maintain a predetermined spacing, thereby obtaining a hollow fiber membrane woven mat 10 with a bent structure.

[0062] The method for manufacturing the hollow fiber membrane woven mat in the above embodiment involves bending the hollow fiber membrane 110 and weaving it into a mat using braided yarn 120. A bent gap is formed between adjacent hollow fiber membranes 110. A multi-layered hollow fiber membrane module is prepared using this hollow fiber membrane woven mat 10. Since the hollow fiber membrane 110 is bent, the hollow fiber membranes 110 of adjacent layers of the hollow fiber membrane module are separated from each other to form gaps, avoiding overlap and blockage. Liquid or gas flows uniformly through the gaps between the hollow fiber membranes 110, between the intermediate fiber membranes 210, and between the hollow fiber membranes 110 and the hollow fiber membranes 210. Furthermore, during the gas-liquid mixing process, the gas flows within the channels of the hollow fiber membrane 110 and the hollow fiber membrane 210, while the liquid flows uniformly through the gaps between the hollow fiber membranes 110, between the intermediate fiber membranes 210, and between the hollow fiber membranes 110 and 210. The hollow fiber membranes 110 and the bends are arranged in a bent shape, which effectively prolongs the gas-liquid mixing time. This is especially valuable in the field of artificial lungs, as it prevents plasma leakage and improves the service life of the components.

[0063] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A hollow fiber membrane woven mat, characterized in that, It includes multiple hollow fiber membranes and multiple braided threads; the multiple hollow fiber membranes are arranged sequentially at intervals along the extension direction of the braided threads, the hollow fiber membranes are arranged in a bent shape, and a bent gap is formed between two adjacent hollow fiber membranes, the spacing of the gaps may be the same or different; Multiple braiding threads are arranged at intervals along the length of the hollow fiber membrane and are respectively wound around each hollow fiber membrane, so that each hollow fiber membrane is woven into a whole; The hollow fiber membrane is connected to the adjacent hollow fiber membrane at the same location by two braided threads that are cross-wound. The braided yarn is wound around the bending position of the hollow fiber membrane and crosses and wound at the bending position of the hollow fiber membrane to form a fixed node structure; The hollow fiber membrane includes a plurality of alternating first folds and second folds, with an angle α between the first folds and the second folds.

2. The hollow fiber membrane woven mat according to claim 1, characterized in that, 90°≤a＜180°。 3. The hollow fiber membrane woven mat according to claim 2, characterized in that, The first fold and the second fold have different bending directions relative to the central axis of the hollow fiber membrane; the central axis is perpendicular to the extension direction of the braided thread; Alternatively, the first fold is bent in the same direction relative to the central axis of the hollow fiber membrane, and the second fold is parallel to the central axis of the hollow fiber membrane; Alternatively, the first fold may be bent alternately in different directions relative to the central axis of the hollow fiber membrane, and the second fold may be parallel to the central axis of the hollow fiber membrane.

4. The hollow fiber membrane woven mat according to claim 1, characterized in that, The bending directions of the multiple hollow fiber membranes are consistent.

5. A hollow fiber membrane module, characterized in that, It includes at least two layers of hollow fiber membrane woven mat stacked together, wherein at least one layer has a structure of hollow fiber membrane woven mat as described in any one of claims 1-4.

6. The hollow fiber membrane module according to claim 5, characterized in that, One layer of the at least two-layer hollow fiber membrane woven mat has the following characteristics: the hollow fiber membranes are arranged longitudinally or laterally and a straight gap is formed between adjacent hollow fiber membranes, and the spacing of the gaps may be the same or different.

7. The hollow fiber membrane module according to claim 5, characterized in that, One layer of the at least two-layer hollow fiber membrane woven pad has the following characteristics: the hollow fiber membrane woven pad also adopts the hollow fiber membrane woven pad described in any one of claims 1-5; the bending direction of the hollow fiber membrane of the adjacent upper and lower hollow fiber membrane woven pads is different, or the bending direction of the hollow fiber membrane of the adjacent upper and lower hollow fiber membrane woven pads is the same and staggered.

8. The hollow fiber membrane module according to claim 5 or the hollow fiber membrane woven mat according to any one of claims 1-5, characterized in that, The hollow fiber membrane is made of one or more of the following: polypropylene, polyethylene, polytetramethylisoprene, polyethersulfone, polysulfone, polyester, polytetrafluoroethylene, and polyvinylidene fluoride. And / or, the braided yarn is made of polypropylene, polyester, acrylic, nylon or cotton yarn, and the braided yarn is 10D-100D.

9. A method for manufacturing the hollow fiber membrane woven mat as described in claims 1-4, characterized in that, The manufacturing method includes the following steps: Hollow fiber membrane is used as the warp, and the hollow fiber membrane is bent. A woven mat is formed by weaving two intersecting braided threads as weft threads, and a bent gap is formed between adjacent hollow fiber membranes in the woven mat; or, Hollow fiber membrane is used as the weft thread, and the hollow fiber membrane is bent. Two intersecting braided threads are used as warp threads to form a braided mat, and a bent gap is formed between adjacent hollow fiber membranes in the braided mat.

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