WO2023108947A1

WO2023108947A1 - Hollow fiber membrane assembly, and hollow fiber membrane kinitted pad and knitting method therefor

Info

Publication number: WO2023108947A1
Application number: PCT/CN2022/083302
Authority: WO
Inventors: 邓智华; 倪澄峰; 甘宇
Original assignee: 创脉医疗科技(上海)有限公司; 浙江脉通智造科技(集团)有限公司
Priority date: 2021-12-16
Filing date: 2022-03-28
Publication date: 2023-06-22
Also published as: CN116334831A

Abstract

A hollow fiber membrane assembly, a hollow fiber membrane knitted pad and a knitting method therefor. The hollow fiber membrane knitted pad comprises a plurality of hollow fiber membranes (110) and a plurality of knitting threads (120), wherein the plurality of hollow fiber membranes (110) are sequentially arranged at intervals in an extension direction of the knitting threads (120), the hollow fiber membranes (110) are arranged in a bent shape, a bent gap is formed between every two adjacent hollow fiber membranes (110), and the distances between the gaps are the same or different; and the plurality of knitting threads (120) are arranged at intervals in the lengthwise direction of the hollow fiber membranes (110) and are respectively wound around the hollow fiber membranes (110), so that the hollow fiber membranes (110) are knitted together.

Description

Hollow fiber membrane module, braided mat and braiding method thereof

Cross References to Related Applications

This application claims the priority of the Chinese patent application with the application number 2021115408333 and the title of the invention "Hollow Fiber Membrane Module, Woven Mat and Its Weaving Method" filed with the China Patent Office on December 16, 2021, the entire contents of which are incorporated by reference in this application.

technical field

The present application relates to the technical field of hollow fiber membrane production, in particular to a hollow fiber membrane module, a woven mat and a weaving method thereof.

technical background

The tube wall of the hollow fiber membrane has micropores and has the characteristics of selective permeability. It is used in special fields such as water treatment filters, artificial kidneys, and artificial lungs. After the hollow fiber membrane is prepared, it needs to be prepared as a module. The traditionally prepared hollow fiber membrane module has uneven hydrodynamic distribution, low utilization rate of the hollow fiber membrane, poor filtration effect, and prone to clogging after long-term use, especially in the medical field. It will shorten the life of the components, and in the field of artificial lungs, it will cause adverse effects such as plasma leakage.

Contents of the invention

According to various exemplary embodiments of the present application, a hollow fiber membrane module, a braided mat, and a braided method thereof are provided.

A hollow fiber membrane braided mat, comprising a plurality of hollow fiber membranes and a plurality of braided wires; a plurality of hollow fiber membranes are arranged at intervals along the extending direction of the braided wires, and the hollow fiber membranes are arranged in a bent shape, Bent gaps are formed between two adjacent hollow fiber membranes, and the pitches of the gaps are the same or different;

A plurality of braided wires are arranged at intervals along the length direction of the hollow fiber membranes and are respectively wound on the hollow fiber membranes, so that the hollow fiber membranes are braided into one body.

In some of these embodiments, the hollow fiber membrane includes a plurality of alternately arranged first folded sections and second folded sections, the angle between the first folded sections and the second folded sections is a, 90°≤ a<180°.

In some of the embodiments, the hollow fiber membrane includes a plurality of alternately arranged first folded sections and second folded sections, the angle between the first folded sections and the second folded sections is a, and 120°≤ a≤150°.

In some of these embodiments, the bending directions of the first folded section and the second folded section are different relative to the central axis of the hollow fiber membrane, and the central axis is perpendicular to the extending direction of the braided wire;

Alternatively, the first folding section is bent in the same direction relative to the central axis of the hollow fiber membrane, and the second folding section is parallel to the central axis of the hollow fiber membrane;

Alternatively, the first folded section is bent alternately in different directions relative to the central axis of the hollow fiber membrane, and the second folded section is parallel to the central axis of the hollow fiber membrane.

In some of the embodiments, the same position of the hollow fiber membrane is connected to the adjacent hollow fiber membrane by two braided wires intertwined.

In some of the embodiments, the braided wire is wound at the bending position of the hollow fiber membrane.

A hollow fiber membrane module, comprising at least two layers of hollow fiber membrane woven mats stacked, wherein at least one layer adopts the hollow fiber membrane woven mat as described above.

In some of these embodiments, the at least two layers of hollow fiber membrane woven mats include at least one layer of a second type of hollow fiber membrane woven mat, and the hollow fiber membranes of the second type of hollow fiber membrane woven mat are arranged vertically or horizontally and Linear gaps are formed between adjacent hollow fiber membranes, and the pitches of the gaps are the same or different.

In some embodiments, the braiding line of the second hollow fiber membrane mat is perpendicular to or at a certain angle to the extending direction of the hollow fiber membranes.

In some of these embodiments, each layer of the at least two layers of hollow fiber membrane woven mat adopts the hollow fiber membrane woven mat as described above; the bending direction of the hollow fiber membranes of the adjacent upper and lower layers of hollow fiber membrane woven mats different, or the hollow fiber membranes of the adjacent upper and lower layers of the hollow fiber membrane woven mat have the same bending direction and are staggered.

In one embodiment, the hollow fiber membrane is made of one of polypropylene, polyethylene, polytetramethylisoprene, polyethersulfone, polysulfone, polyester, polytetrafluoroethylene, polyvinylidene fluoride or multiple combinations; and/or, the braided thread is made of polypropylene, polyester, acrylic, nylon or cotton thread, and the braided thread is 10D-100D.

A method for manufacturing a hollow fiber membrane woven mat, comprising:

The hollow fiber membrane is used as the warp, and the hollow fiber membrane is bent;

Weaving two braided wires arranged crosswise as wefts to form a braided pad, forming a bent gap between the adjacent hollow fiber membranes of the braided pad;

or,

The hollow fiber membrane is used as the weft, and the hollow fiber membrane is bent;

Two braided wires intersected as warps are used to weave to form a braided mat, and a bent gap is formed between adjacent hollow fiber membranes of the braided mat.

The above-mentioned hollow fiber membrane module, woven mat and its weaving method, the hollow fiber membrane is bent and woven into a mat through the braiding wire, and a bent gap is formed between adjacent hollow fiber membranes, and the hollow fiber membrane woven mat is used to prepare a multi- Since the hollow fiber membranes are arranged in a bent shape, the hollow fiber membranes of the adjacent layers of the hollow fiber membrane modules are separated from each other to form gaps to avoid clogging caused by overlapping, and the liquid or gas passes through the gap between the hollow fiber membranes. Gaps flow evenly. Moreover, during the mixing process of gas and liquid, the gas flows in the pipe of the hollow fiber membrane, and the liquid flows in the gap between the hollow fibers. The hollow fiber membrane and the gap between the bends are arranged in a bent shape, which effectively prolongs the gap between the gas and the liquid. The mixing time is even more valuable in the field of artificial lungs to prevent plasma leakage and increase the service life of components.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the traditional technology. Obviously, the accompanying drawings in the following description are only the present invention For some embodiments of the application, those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic diagram of a hollow fiber membrane woven mat in Example 1 of the present application;

Fig. 2 is the structural representation of braided wire and hollow fiber membrane in Fig. 1;

Fig. 3 is a schematic diagram of the hollow fiber membrane woven mat of Example 2 of the present application;

Fig. 4 is a schematic diagram of the hollow fiber membrane woven mat of the third embodiment of the present application;

Fig. 5 is a schematic diagram of a hollow fiber membrane woven mat according to Example 4 of the present application;

Fig. 6 is a schematic diagram of the hollow fiber membrane woven mat of Example 5 of the present application;

Fig. 7 is a schematic diagram of the hollow fiber membrane woven mat of the sixth embodiment of the present application;

8 is a schematic diagram of a second hollow fiber membrane mat of a hollow fiber membrane module according to an embodiment of the present application;

9 is a schematic diagram of a second hollow fiber membrane mat of a hollow fiber membrane module according to another embodiment of the present application;

Fig. 10 is a schematic diagram of a hollow fiber membrane module according to an embodiment of the present application; and

FIG. 11 is a schematic cross-sectional view of FIG. 10 .

Detailed ways

In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and thus should not be construed as limiting the application.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In this application, terms such as "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense, for example, it can be a fixed connection or a detachable connection, unless otherwise clearly specified and limited. , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In the present application, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may mean that the first and second features are in direct contact, or that the first and second features are indirect through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions are for the purpose of illustration only and are not intended to represent the only embodiments.

1-7, the embodiment of the present application provides a hollow fiber membrane braided mat 10, including a plurality of hollow fiber membranes 110 and a plurality of braided wires 120, and a plurality of hollow fiber membranes 110 extend along the braided wires 120 The directions are arranged at intervals in sequence, the hollow fiber membranes 110 are arranged in a bent shape, and a bent gap is formed between two adjacent hollow fiber membranes 110, and the gaps have the same or different pitches. A plurality of braided wires 120 are arranged at intervals along the length direction of the hollow fiber membranes 110 and are respectively wound on the hollow fiber membranes 110 so that the hollow fiber membranes 110 are braided into one body. In some embodiments, all hollow fiber membranes 110 are bent in the same direction.

In one embodiment, as shown in FIGS. 1-7 , the hollow fiber membrane 110 includes a plurality of alternately arranged first folded sections 112 and second folded sections 114 . The angle between the first folding section 112 and the second folding section 114 is a, and 90°≤a<180°. In other embodiments, 120°≤a≤150°. The size of the included angle a reflects the bending degree of the hollow fiber membrane 110 . In one embodiment, the first folding section 112 is bent at 45° toward the direction of the braided line 120 , the second bent section 114 is bent at 45° toward the direction of the braided line 120 , and the included angle a is 90°. In other embodiments, the first folding section 112 is bent 30° toward the braided line 120 , the second bent section 114 is bent 30° toward the braided line 120 , and the included angle a is 120°. The included angle a is set between 90° and 180°, so that the hollow fiber membranes 110 present a suitable bending angle, which not only ensures that a suitable gap is formed between adjacent hollow fiber membranes 110, but also allows the medium to pass through the gap evenly. Avoid clogging, and ensure smooth flow in the inner channel of the hollow fiber membrane 110 .

Referring to FIG. 1 , a hollow fiber membrane woven mat 10 provided in Embodiment 1 of the present application has different bending directions of the first folded section 112 and the second folded section 114 relative to the central axis b of the hollow fiber membrane 110 , The central axis b is perpendicular or substantially perpendicular to the extending direction of the braided wire 120 . For example, the first folded section 112 and the second folded section 114 are both on the right side of the central axis, respectively biased to the upper right and lower right. In this embodiment, the hollow fiber membranes 110 are bent into a zigzag structure, and gaps of the zigzag structure are formed between adjacent hollow fiber membranes 110 , and the medium flows through the gaps to increase the flow distance.

Referring to FIG. 2 , in this embodiment, adjacent hollow fiber membranes 110 are wound and connected by two braided wires 120 arranged crosswise, so that a predetermined gap is maintained between the hollow fiber membranes 110 . The extending direction of the braided wire 120 is perpendicular or substantially perpendicular to the central axis. In other embodiments, the hollow fiber membranes 110 may be connected by twisting the braided wires 120 in other ways, such as a single-wire locking type.

Referring to FIG. 3 , a hollow fiber membrane woven mat 10 provided in Embodiment 2 of the present application, the first folded section 112 and the second folded section 114 are respectively bent in different directions relative to the central axis b of the hollow fiber membrane 110 , for example, they are all on the left side of the central axis, and deviate to the upper left and lower left respectively. The difference from the first embodiment is that the bending directions of the first folding section 112 and the second folding section 114 in this embodiment are opposite to those in the first embodiment. In this embodiment, the hollow fiber membranes 110 are bent into a zigzag structure, and gaps of the zigzag structure are formed between adjacent hollow fiber membranes 110 , and the medium flows through the gaps to increase the flow distance.

Referring to Fig. 4 , a hollow fiber membrane woven mat 10 provided in Embodiment 3 of the present application, its first folded section 112 is bent in the same direction relative to the central axis of the hollow fiber membrane 110, specifically, the bending To the upper left or lower right of the central axis, the second folding section 114 is parallel to the central axis of the hollow fiber membrane 110 . In this embodiment, the hollow fiber membranes 110 are bent into a ladder-like structure, and a gap similar to a ladder structure is formed between adjacent hollow fiber membranes 110. The medium flows smoothly through the gaps, increasing the flow distance, and the medium in the hollow fiber membranes 110 flows smooth.

Referring to FIG. 5 , a hollow fiber membrane woven mat 10 provided in Embodiment 4 of the present application, its first folded section 112 is bent in the same direction relative to the central axis of the hollow fiber membrane 110 , specifically the bending direction Right above or below the central axis, the second folding section 114 is parallel to the central axis of the hollow fiber membrane 110 . The difference from the third embodiment is that the bending direction of the first bending section 112 in this embodiment is opposite to that in the third embodiment. In this embodiment, the hollow fiber membranes 110 are bent into a ladder-like structure, and a gap similar to a ladder structure is formed between adjacent hollow fiber membranes 110. The medium flows smoothly through the gaps, increasing the flow distance, and the medium in the hollow fiber membranes 110 flows smooth.

Referring to FIG. 6 , a hollow fiber membrane woven mat 10 provided in Embodiment 5 of the present application, its first folded section 112 is alternately bent in different directions relative to the central axis of the hollow fiber membrane 110 , specifically, at intervals. The second folded section 114 is parallel to the central axis of the hollow fiber membrane 110 and is bent to the upper left and lower left of the central axis, or bent at intervals to the upper right and lower right of the central axis. In this embodiment, the hollow fiber membranes 110 are bent into an S-shaped structure, and gaps similar to the S-shaped structure are formed between adjacent hollow fiber membranes 110. The medium flows smoothly and circuitously through the gaps, increasing the flow distance, and the hollow fiber membranes 110 The inner medium flows smoothly.

Referring to FIG. 7 , a hollow fiber membrane woven mat 10 provided in Embodiment 6 of the present application, its first folded section 112 is alternately bent in different directions relative to the central axis of the hollow fiber membrane 110 , specifically bent at intervals The second folded section 114 is parallel to the central axis of the hollow fiber membrane 110 and bent to the upper right and lower right of the central axis, or bent at intervals to the upper left and lower left of the central axis. The difference from the fifth embodiment is that the bending direction of the first folding section 112 in this embodiment is correspondingly opposite to that in the fifth embodiment. In this embodiment, the hollow fiber membranes 110 are bent into an S-shaped structure, and gaps similar to the S-shaped structure are formed between adjacent hollow fiber membranes 110. The medium flows smoothly and circuitously through the gaps, increasing the flow distance, and the hollow fiber membranes 110 The inner medium flows smoothly.

Referring to FIG. 2 , in the above embodiment, the same position of the hollow fiber membrane 110 is connected to the adjacent hollow fiber membrane 110 through two braided wires 120 intertwined. In other words, adjacent hollow fiber membranes 110 are wound and connected by two intersecting braided wires 120 , so that a predetermined gap is maintained between the hollow fiber membranes 110 . Specifically, at the same position of the hollow fiber membrane 110, two braided wires 120 are respectively wound once at this position from opposite directions, so that the hollow fiber membrane 110 is fixedly bound, and a plurality of hollow fiber membranes 110 pass through this position. The method realizes the interval setting with a certain gap, and the gap can be the same or different. In other embodiments, the hollow fiber membranes 110 may be connected by twisting the braided wires 120 in other ways, such as a single-wire locking type.

Further, referring to Fig. 1-Fig. 7, in one of the embodiments, the braided wire 120 is wound at the bending position of the hollow fiber membrane 110, so that the hollow fiber membrane 110 remains in the bent state, and the hollow fiber membrane 110 Maintain a predetermined gap between. In other embodiments, the braided wire 120 may also be wound on the straight portion of the hollow fiber membrane 110 .

Referring to FIG. 8 , in one embodiment, the hollow fiber membranes 210 of the second type of hollow fiber membrane mat 20 are arranged vertically, and a linear gap is formed between adjacent hollow fiber membranes 210 . In this embodiment, the braided wire 220 is perpendicular to or at a certain angle to the extending direction of the hollow fiber membrane 210 .

Referring to FIG. 9 , in another embodiment, the hollow fiber membranes 210 of the second type of hollow fiber membrane mat 20 are arranged laterally, and linear gaps are formed between adjacent hollow fiber membranes 210 . In this embodiment, the braided wire 220 is perpendicular to or at a certain angle to the extending direction of the hollow fiber membrane 210 .

In order to improve the service life of the hollow fiber membrane module, the hollow fiber membrane 110 needs to be sorted before the membrane module is cast, so the above-mentioned weaving of the hollow fiber membrane 110 is particularly critical, and the hollow fiber membrane woven mat after finishing is wound or laid flat Or other forms become membrane components for packaging.

The present application provides a hollow fiber membrane module, comprising at least two layers of hollow fiber membrane woven mats stacked, wherein the structure of at least one layer is selected from any one of the hollow fiber membrane woven mats 10 shown in FIGS. 1-7 above. In one embodiment, another layer of woven hollow fiber membrane mat is selected from the second type of hollow fiber membrane mat 20 shown in FIG. 8 or FIG. 9 above.

Specifically, as an example, in FIG. 10 and FIG. 11 , the woven hollow fiber membrane mat 10 shown in FIG. 1 and the second hollow fiber membrane mat 20 shown in FIG. 8 are stacked. As shown in Figure 11, in the prepared hollow fiber membrane module, the hollow fiber membrane woven mat 10 includes a plurality of hollow fiber membranes 110 arranged at intervals, and the second type of hollow fiber membrane mat 20 includes a plurality of hollow fiber membranes 210 arranged at intervals The adjacent two layers of hollow fiber membranes 110 and hollow fiber membranes 210 are separated from each other to form gaps to avoid clogging caused by overlapping. The gaps between the fiber membranes 210 flow uniformly. And in the mixing process of gas and liquid, the gas flows in the pipeline of hollow fiber membrane 110 and hollow fiber membrane 210, and the liquid flows between hollow fiber membranes 110, between intermediate fiber membranes 210 and between hollow fiber membranes 110 and hollow fiber membranes 210. The gap between them flows evenly, and the hollow fiber membrane 110 and the bent gap are arranged in a bent shape, which effectively prolongs the mixing time of gas and liquid. It is even more valuable in the field of artificial lungs, preventing plasma leakage and improving the service life of components.

In other embodiments, another layer of hollow fiber membrane woven mat of the hollow fiber membrane module is also selected from any one of the hollow fiber membrane woven mats 10 in the first to sixth embodiments shown in FIGS. 1-7 above. The bending directions of the hollow fiber membranes 110 of the adjacent upper and lower layers of the hollow fiber membrane woven mat 10 are different. In some embodiments, one layer uses the hollow fiber membrane woven mat 10 in FIG. 1 , and the other layer can use the woven mat with any structure in FIGS. 3-9 . In some other embodiments, one layer uses the hollow fiber membrane woven mat 10 shown in FIG. 3 , and the other layer can use the woven mat with any structure in FIGS. 1 , 4-9. In yet other embodiments, one layer uses the hollow fiber membrane woven mat 10 in FIG. 4 , and the other layer can use the woven mat with any structure in FIGS. 1 , 3 , 5-9. In still other embodiments, one layer uses the hollow fiber membrane woven mat 10 in FIG. 5 , and the other layer can use the woven mat with any structure in FIGS. 1 , 3 , 4 , 6-9. In still other embodiments, one layer uses the hollow fiber membrane woven mat 10 in FIG. 6 , and the other layer can use the woven mat with any structure in FIGS. 1 , 3 , 4 , 5 , and 7-9. In still other embodiments, one layer uses the hollow fiber membrane woven mat 10 in FIG. 7 , and the other layer can use the woven mat with any structure in FIGS. 1 , 3-6, 8 and 9 .

In other embodiments, the bending direction of the hollow fiber membranes 110 of the adjacent upper and lower layers of the hollow fiber membrane mat 10 is the same, for example, the same hollow fiber membrane mat 10 is used to meet the requirements of the hollow fiber membranes 110 of the adjacent layers of the module. Just stagger the settings. The hollow fiber membranes 110 of the two layers of hollow fiber membrane woven mat 10 are arranged in a bent shape, and the hollow fiber membranes 110 of the adjacent layers of the hollow fiber membrane module are separated from each other to form gaps to avoid clogging caused by overlapping, and the liquid or gas passes through the hollow fibers. The gap between the membranes 110 flows evenly; the hollow fiber membrane 110 and the bent gap are arranged in a bent shape, which effectively prolongs the mixing time of gas and liquid, and is especially valuable in the field of artificial lungs, preventing plasma leakage and improving the use of components life.

In one embodiment, the hollow fiber membrane is made of one of polypropylene, polyethylene, polytetramethylisoprene, polyethersulfone, polysulfone, polyester, polytetrafluoroethylene, polyvinylidene fluoride or a variety of mixtures. In some embodiments, the braided thread 120 is made of polypropylene, polyester, acrylic, nylon or cotton thread, and the braided thread 120 is 10D-100D.

Referring to Figures 1-9, an embodiment of the present application provides a method for manufacturing a hollow fiber membrane woven mat, using a hollow fiber membrane 110 as a warp, and bending the hollow fiber membrane 110; The weft threads are woven to form a woven mat, and a bent gap is formed between adjacent hollow fiber membranes 110 of the woven mat. In other embodiments, the hollow fiber membrane 110 is used as the weft, and the hollow fiber membrane 110 is bent; the two braided wires 120 arranged crosswise are used as the warp to weave to form a braided mat, and the braided mat is formed between adjacent hollow fiber membranes 110 Create a bent gap. The hollow fiber membranes 110 can be bent with a jig, and the braided wires 120 are cross-braided between the hollow fiber membranes 110 by a braiding machine to keep a predetermined distance between the hollow fiber membranes 110, thereby obtaining a hollow fiber membrane with a bent structure Woven mat10.

In the manufacturing method of the hollow fiber membrane woven mat of the above embodiment, the hollow fiber membrane 110 is bent and woven into a mat through the braiding wire 120, and a bent gap is formed between adjacent hollow fiber membranes 110, and the hollow fiber membrane woven mat 10 is used. A hollow fiber membrane module with multiple layers is prepared. Since the hollow fiber membranes 110 are arranged in a bent shape, the hollow fiber membranes 110 of adjacent layers of the hollow fiber membrane module are separated from each other to form a gap, which avoids clogging caused by overlapping, and allows liquid or gas to pass through. The gap 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 flows uniformly. And in the mixing process of gas and liquid, the gas flows in the pipeline of hollow fiber membrane 110 and hollow fiber membrane 210, and the liquid flows between hollow fiber membranes 110, between intermediate fiber membranes 210 and between hollow fiber membranes 110 and hollow fiber membranes 210. The gap between them flows evenly, and the hollow fiber membrane 110 and the bent gap are arranged in a bent shape, which effectively prolongs the mixing time of gas and liquid. It is even more valuable in the field of artificial lungs, preventing plasma leakage and improving the service life of components.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present application, and the description thereof is relatively specific and detailed, but should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of protection of the patent application should be based on the appended claims.

Claims

A hollow fiber membrane braided mat, comprising a plurality of hollow fiber membranes and a plurality of braided wires;

A plurality of hollow fiber membranes are sequentially arranged at intervals along the extending direction of the braided wire, the hollow fiber membranes are arranged in a bent shape, and a bent gap is formed between two adjacent hollow fiber membranes, and the gap The spacing is the same or different;

A plurality of braided wires are arranged at intervals along the length direction of the hollow fiber membranes and are respectively wound on the hollow fiber membranes, so that the hollow fiber membranes are braided into one body.
The hollow fiber membrane woven mat according to claim 1, wherein the hollow fiber membrane comprises a plurality of alternately arranged first folded sections and second folded sections, and the gap between the first folded sections and the second folded sections The included angle is a, 90°≤a<180°.
The hollow fiber membrane woven mat according to claim 1, wherein the hollow fiber membrane comprises a plurality of alternately arranged first folded sections and second folded sections, and the gap between the first folded sections and the second folded sections The included angle is a, 120°≤a≤150°.
The hollow fiber membrane woven mat according to claim 2, wherein the bending direction of the first folding section and the second folding section are different relative to the central axis of the hollow fiber membrane, and the central axis is perpendicular to the The direction in which the braided wires extend.
The hollow fiber membrane woven mat according to claim 2, wherein the first folded section is bent in the same direction relative to the central axis of the hollow fiber membrane, and the second folded section is bent relative to the hollow fiber membrane The central axis is parallel, and the central axis is perpendicular to the extending direction of the braided wire.
The hollow fiber membrane woven mat according to claim 2, wherein the first folded section is alternately bent in different directions relative to the central axis of the hollow fiber membrane, and the second folded section is bent relative to the hollow fiber membrane The central axis of the membrane is parallel, said central axis is perpendicular to the extension direction of said braided wires.
The woven hollow fiber membrane mat according to any one of claims 1-6, wherein the same position of the hollow fiber membrane is connected to adjacent hollow fiber membranes by two braided wires intertwined.
The hollow fiber membrane woven mat according to claim 7, wherein the braided wire is wound at a bent position of the hollow fiber membrane.
The hollow fiber membrane woven mat according to any one of claims 1-8, wherein the hollow fiber membrane is made of polypropylene, polyethylene, polytetramethylisoprene, polyethersulfone, polysulfone, polyester, It is made by mixing one or more of polytetrafluoroethylene and polyvinylidene fluoride.
The hollow fiber membrane woven mat according to any one of claims 1-8, wherein the braided thread is made of polypropylene, polyester, acrylic, nylon or cotton thread, and the braided thread is 10D-100D.
A hollow fiber membrane module, comprising at least two layers of hollow fiber membrane woven mats stacked, wherein the structure of at least one layer adopts the hollow fiber membrane woven mat described in any one of claims 1-10.
The hollow fiber membrane module according to claim 11, wherein the at least two layers of hollow fiber membrane woven mats include at least one layer of the second type of hollow fiber membrane woven mats, and the hollow fibers of the second type of hollow fiber membrane woven mats The membranes are arranged vertically or horizontally, and a linear gap is formed between adjacent hollow fiber membranes, and the gaps have the same or different pitches.
The hollow fiber membrane module according to claim 12, wherein the braiding line of the second type of hollow fiber membrane mat is perpendicular to or at a certain angle to the extending direction of the hollow fiber membranes.
The hollow fiber membrane module according to claim 11, wherein each layer of the at least two layers of hollow fiber membrane woven mat adopts the hollow fiber membrane woven mat according to any one of claims 1-10; The bending directions of the hollow fiber membranes of the hollow fiber membrane woven mats of the layers are different, or the bending directions of the hollow fiber membranes of the hollow fiber membrane woven mats of two adjacent layers are the same and staggered.
The hollow fiber membrane module according to claim 11, wherein the hollow fiber membrane is made of polypropylene, polyethylene, polytetramethylisoprene, polyethersulfone, polysulfone, polyester, polytetrafluoroethylene, poly It is made by mixing one or more kinds of vinylidene fluoride.
The hollow fiber membrane module according to claim 11, wherein the braided thread is made of polypropylene, polyester, acrylic, nylon or cotton thread, and the braided thread is 10D-100D.
A method for manufacturing a hollow fiber membrane woven mat, comprising:

The hollow fiber membrane is used as the warp, and the hollow fiber membrane is bent;

Weaving two braided wires intersected as wefts to form a braided mat, and a bent gap is formed between the adjacent hollow fiber membranes of the braided mat;

or,

The hollow fiber membrane is used as the weft, and the hollow fiber membrane is bent;

The braided mat is formed by using two crossed braided wires as warp threads, and a bent gap is formed between the adjacent hollow fiber membranes of the braided mat.