Integrated Hollow Fiber Membrane Module and its Assembly Method

Abstract

This application relates to an integrated hollow fiber membrane module and its assembly method. The module includes a housing with a gas outlet and openings at both ends, hollow fiber membrane filaments disposed within the housing, and a head assembly detachably installed at the opening of the housing. The hollow fiber membrane filaments are assembled by directly injecting epoxy resin material into the filament bundles within the housing and then curing it. The head assembly has an epoxy resin injection port and a sealing liquid injection port, and may further include a clamping part to apply radial clamping force. The corresponding assembly method includes placing the hollow fiber membrane filaments within the housing, directly injecting epoxy resin material into both ends of the filament bundle and curing it to form a head, and may also include injecting sealing liquid and epoxy resin through the injection ports of the head assembly, and pressing the head using the clamping part. This application, through the combination of integrated molding and a detachable head assembly, achieves lightweight assembly while maintaining sealing reliability and ease of maintenance.

Description

Technical Field

[0001] This application relates to the field of gas separation membrane technology, and in particular to an integrated hollow fiber membrane module and its assembly method. Background Technology

[0002] Hollow fiber membrane separation technology has been widely used in gas separation, especially in oxygen production, due to its advantages such as high efficiency, energy saving, and environmental friendliness. As the core device of this technology, the structural design and manufacturing process of the hollow fiber membrane module directly affect the oxygen yield and purity. In specific applications such as oxygen production on high-altitude trains, where the oxygen content in the air is low, continuous oxygen replenishment is required in the train carriages during operation to ensure passenger comfort and safety. Therefore, oxygen production equipment must possess high efficiency, lightweight design, and high reliability.

[0003] Traditional membrane modules typically employ a modular casting and assembly process, where the membrane core, outer shell, and end caps are fabricated separately before assembly. This method suffers from complex processes, long production cycles, numerous seams leading to potential leaks, and poor sealing performance. Furthermore, to reinforce the membrane core, an aluminum alloy or stainless steel outer shell is often added, resulting in a significant overall module weight. In weight-sensitive applications such as high-altitude trains and aerospace, equipment weight directly impacts energy consumption and system integration flexibility, limiting the widespread application of this technology in vehicle-mounted oxygen generation, aerospace, and mobile equipment.

[0004] In recent years, hollow fiber membrane technology has made some progress in materials, design, and fabrication processes. In terms of materials, by constructing novel casting systems and developing one-step continuous spinning processes, precise control of the hollow fiber membrane structure and the preparation of asymmetric gradient pore structures have been achieved, improving gas flux and structural stability. Breakthroughs have also been made in low-damage weaving technology for membrane materials, achieving low-tension weft laying and low-damage weaving of membrane fibers using specialized warp knitting equipment. Despite these advancements, some problems still need to be solved in hollow fiber membrane modules, especially for special applications such as oxygen production on high-altitude trains: Structural weight and integration flexibility: Traditional split structures and the use of metal casings are not conducive to component lightweighting, limiting their application in weight-sensitive scenarios such as mobile devices. Manufacturing process complexity and sealing reliability: Split-type manufacturing and assembly processes involve numerous steps, resulting in low production efficiency, and the seams and gaps between components may become potential leakage points, affecting the long-term sealing performance and service life of the components.

[0005] Combining advanced membrane materials with optimized module design parameters through more efficient manufacturing processes to achieve compact, lightweight, and highly reliable modules while ensuring high performance remains a challenge. Therefore, improvements to hollow fiber membrane modules and their assembly methods are needed to address the shortcomings of traditional split-type structures in terms of weight, sealing, and production complexity, and to adapt to the specific application requirements for high performance, lightweight, and high reliability of membrane modules. Summary of the Invention

[0006] This application provides an integrated hollow fiber membrane module and its assembly method, aiming to solve the problems of multiple seams, easy leakage, and heavy weight of traditional split modules. Combined with a detachable end cap assembly, it achieves lightweighting of the module while ensuring sealing performance and simplifying the production process. The objective of this application is achieved through the following technical solution: the integrated hollow fiber membrane module of this application includes a shell, hollow fiber membrane fibers, and an end cap assembly; The housing includes a gas outlet and openings at both ends; The end cap assembly is detachably disposed at the opening of the housing; The hollow fiber membrane filaments are disposed inside the housing and have epoxy resin end caps at both ends; The epoxy resin end cap is formed by placing the hollow fiber membrane filaments inside the shell and then injecting epoxy resin material between the bundles of the hollow fiber membrane filaments and curing it.

[0007] In one embodiment, the end cap assembly includes an epoxy resin injection port.

[0008] In one embodiment, the end cap assembly further includes a clamping portion having a surface that conforms to the inner surface of the housing, the thickness of the clamping portion gradually increasing from the outermost side.

[0009] In one embodiment, the end cap assembly includes an end cap, a sealing ring, and a nut, and the housing includes a threaded joint.

[0010] This application further provides a method for assembling an integrated hollow fiber membrane module, including: A housing is provided, the housing including a gas outlet and openings at both ends; Hollow fiber membrane filaments are placed inside the housing; Epoxy resin material is injected between the filament bundles at both ends of the hollow fiber membrane filaments. The epoxy resin material is cured to form an epoxy resin end cap.

[0011] In one embodiment, end cap assemblies are also provided at the openings at both ends of the housing.

[0012] In one embodiment, the end cap assembly includes an epoxy resin injection port through which epoxy resin material is injected after the end cap assembly is installed.

[0013] In one embodiment, the end cap assembly further includes an end capping liquid injection port. Before injecting the epoxy resin material, the assembly is placed vertically, and the end capping liquid is injected first, followed by the injection of the epoxy resin material.

[0014] In one embodiment, the end cap assembly further includes a clamping portion, the thickness of which gradually increases from the outermost side, and the epoxy resin end cap is compressed by the clamping portion while the end cap assembly is being installed.

[0015] In one embodiment, one side of the clamping part is in close contact with the inner surface of the housing.

[0016] Compared with the prior art, this application has the following beneficial effects: The hollow fiber membrane filaments of this application are cured in one step within the shell by injecting epoxy resin to form end caps, eliminating the need for the independent manufacturing and assembly of traditional split membrane cores. This simplifies the production process and shortens the production cycle. While ensuring sealing performance, it also facilitates component maintenance and membrane filament replacement. When the end cap assembly is equipped with epoxy resin injection ports and end-sealing liquid injection ports, precise injection of end-sealing liquid and epoxy resin can be achieved after assembly and positioning. This helps avoid errors from external casting and, combined with the vertical placement step, utilizes the liquid's own weight to improve filling uniformity.

[0017] Epoxy resin is cured between the membrane filament bundles to form an integral end cap, which bonds to the shell from the inside, eliminating the gaps and seams between components in traditional split-type assemblies and structurally reducing potential leakage points. When the end cap assembly includes a clamping part whose thickness gradually increases from the outermost side and closely adheres to the inner surface of the shell, this clamping part applies a continuous radial clamping force to the epoxy resin end cap during assembly. This structure enhances the sealing effect at the interface between the resin end cap and the shell, and its curved transition design also helps reduce stress concentration, thereby improving the reliability of the end cap during long-term use. The epoxy resin material itself has high breakthrough pressure and fatigue resistance after curing, further ensuring the durability of the seal.

[0018] By eliminating the traditional additional metal membrane core shell and utilizing the high compressive strength end cap formed after epoxy resin curing to undertake the structural function, the components are made lighter. In weight-sensitive applications such as high-altitude trains, this helps to reduce equipment operating energy consumption and improve system integration flexibility. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the structure of an integrated hollow fiber membrane module in one embodiment of this application; Figure 2 This is a schematic diagram of the cross-sectional structure of one end of the integrated hollow fiber membrane module of this application; Figure 3 This is a schematic flowchart illustrating the assembly method of an integrated hollow fiber membrane module according to one embodiment of this application.

[0020] Explanation of reference numerals in the attached drawings: 100, shell; 110, gas outlet; 120, screw joint; 200, hollow fiber membrane filament; 210, epoxy resin end cap; 300, end cap assembly; 310, end cap; 320, sealing ring; 330, nut; 340, clamping part; 350, epoxy resin injection port; 360, end sealing liquid injection port. Detailed Implementation

[0021] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0022] The terms “comprising” and “having”, and any variations thereof, used in this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0023] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0024] As mentioned above, traditional split-type hollow fiber membrane modules suffer from problems such as complex assembly processes, easy leakage at seams, and heavy weight due to the addition of a metal casing, which limit their application in scenarios with strict requirements for lightweight and high reliability, such as oxygen production on high-altitude trains. To solve the above problems, this application provides a specific embodiment of an integrated hollow fiber membrane module and its assembly method. The technical solution of this application will be described in detail below with reference to the accompanying drawings. The embodiments described are intended to provide a detailed explanation of this application, but are not intended to limit the scope of protection of this application. Please refer to... Figure 1 , Figure 2 In a preferred embodiment of this application, the integrated hollow fiber membrane module includes a housing 100, hollow fiber membrane filaments 200, and a head assembly 300. The housing 100 includes a gas outlet 110 and openings at both ends. The head assembly 300 is detachably disposed at the openings of the housing 100. The hollow fiber membrane filaments 200 are disposed within the housing 100 and have epoxy resin heads 210 at both ends. The epoxy resin heads 210 are formed by injecting epoxy resin material between the bundles of hollow fiber membrane filaments 200 and curing it after placing the hollow fiber membrane filaments 200 inside the housing 100.

[0025] In the integrated hollow fiber membrane module provided in this application, the housing 100 is provided with a gas outlet 110 and openings at both ends; the hollow fiber membrane filaments 200 are placed inside the housing 100, and their ends are formed into epoxy resin end caps 210 by injecting epoxy resin material between the filament bundles and curing it; the end cap assembly 300 is detachably disposed at the opening position of the housing 100. The integrated molding of the epoxy resin end caps 210 is achieved by directly injecting epoxy resin material between the filament bundles after the hollow fiber membrane filaments 200 have been placed inside the housing 100, followed by curing. The method of directly casting the end caps inside the housing 100 constitutes a difference from the traditional split assembly process. By selecting specific types of epoxy resin adhesive and using casting processes, such as programmed temperature rise or gradient temperature rise curing treatment, the cured epoxy resin end caps 210 and the tube sheet can achieve high mechanical strength and pressure resistance. By optimizing the epoxy resin adhesive formulation and casting process, the prepared epoxy end caps and epoxy resin tubing can achieve a pressure resistance of 10 to 11 MPa. The integrated structure eliminates the gaps and seams between components in traditional split-type modules, structurally reducing potential leakage points. Simultaneously, it eliminates the need for a traditional additional metal core shell (such as aluminum alloy or stainless steel), utilizing the high-strength end caps formed after epoxy resin curing to bear the structural load, contributing to the lightweight design of the module.

[0026] The end cap assembly 300 is designed to be detachably installed at the opening of the housing 100, cooperating with the integrally molded epoxy resin end cap 210. This design ensures overall structural stability and sealing while facilitating component maintenance and membrane fiber replacement. In specific implementations, the end cap assembly 300 may include components such as an end cap 310, a sealing ring 320, and a nut 330, which cooperate with structures such as the threaded joint 120 on the housing 100 to achieve reliable connection and sealing. This detachable connection method facilitates internal inspection or cleaning of the component when needed. The integrated hollow fiber membrane module of this application, by integrally molding the epoxy resin end cap 210 with the membrane fiber within the housing 100 and combining it with the detachable end cap assembly 300 design, structurally integrates high pressure resistance and sealing performance with ease of maintenance.

[0027] The end cap assembly 300 is equipped with an epoxy resin injection port and a sealing liquid injection port 360, with corresponding plugs for the injection holes. After the end cap assembly 300 is installed into the housing 100, sealing liquid and epoxy resin material are introduced into the membrane fiber bundle region within the housing 100 through the injection ports. For example, in the end cap design of curtain-type hollow fiber membrane modules, there are also design considerations for guiding liquid distribution through specific flow channel structures. The integrated injection port structure allows the casting step to be performed after the initial assembly and positioning of the assembly, which helps to achieve a more precise and controllable casting process. Specifically, sealing liquid can be pre-injected through the sealing liquid injection port 360 to seal the membrane fiber end holes, followed by the injection of epoxy resin through the epoxy resin injection port. This sequential operation helps to ensure that the epoxy resin forms a complete and dense end cap between the membrane fiber bundles, reducing defects such as air bubbles or unfilled areas, thereby optimizing the sealing effect and mechanical support strength of the end cap. The plugs equipped with the injection ports provide a seal for the aforementioned channels after casting is completed.

[0028] Please refer to further information. Figure 2 In a further embodiment, the end cap assembly 300 includes a clamping portion 340 having a curved surface that conforms to the inner surface of the housing 100, and its thickness gradually increases from the outermost side. This structural feature positively contributes to improving the reliability of the interface seal. During the installation of the end cap assembly 300, the clamping portion 340 can apply a continuous radial clamping force to the cured epoxy resin end cap 210. Its curved surface design, conforming to the inner surface of the housing 100, increases the contact area with the housing 100, which helps to form a uniform clamping force distribution. The gradual increase in thickness of the clamping portion 340 from the outside to the inside allows it to generate a radial compression component during axial installation, further enhancing the interface seal between the resin end cap and the inner wall of the housing 100. In addition, this gradually thickened curved surface transition structure also helps to disperse stress under pressure, reducing the risk of stress concentration.

[0029] The clamping part 340 adopts a centrally symmetrical structure on the end cap assembly 300 with openings at both ends of the housing 100. This ensures a balanced distribution of the clamping force applied to the epoxy resin end caps 210 at both ends, which is beneficial for maintaining the stable fixation of the entire membrane fiber bundle within the housing 100 and ensuring the consistency of the sealing performance at both ends of the assembly. Related research on hollow fiber membrane auxiliary arrangement structures also indicates that a reasonable structural design is crucial for ensuring the quality of subsequent casting operations and membrane assembly efficiency.

[0030] The end cap assembly 300 includes an end cap 310, a sealing ring 320, and a nut 330, and the housing 100 is provided with a threaded joint 120, forming a detachable mechanical connection and sealing solution. The engagement of the threaded joint 120 and the nut 330 realizes a threaded connection between the end cap assembly 300 and the housing 100. For example, using a threaded connection is considered one of the ways to reduce equipment installation steps and speed up construction. The sealing ring 320 (e.g., an O-ring 320) is placed at an appropriate position between the end cap 310 and the housing 100 or the clamping part 340. Under the clamping force generated by bolt tightening, it undergoes elastic deformation, thereby filling the microscopic gaps between the mating surfaces and forming a reliable static sealing barrier. The detachable connection design, while ensuring the overall structural stability and sealing performance of the assembly, provides convenience for subsequent internal inspections, membrane fiber replacements, or maintenance that may be required.

[0031] Please refer to further information. Figure 3 This application further provides a method for assembling an integrated hollow fiber membrane module, comprising: providing a housing 100, the housing 100 including a gas outlet 110 and openings at both ends; placing hollow fiber membrane filaments 200 inside the housing 100; injecting epoxy resin material between the filament bundles at both ends of the hollow fiber membrane filaments 200; and curing the epoxy resin material to form epoxy resin end caps 210.

[0032] The step of directly casting and curing the hollow fiber membrane filaments 200 with epoxy resin within the housing 100 to form a cap differs from the traditional split-assembly process. This method directly introduces uncured epoxy resin material into the end region of the membrane filament bundle already placed inside the housing 100, allowing it to penetrate the gaps between the filaments, and then forms an integrated cap structure through a curing reaction. Utilizing the fluidity of epoxy resin before curing and its ability to form a three-dimensional network structure after curing, this method avoids the traditional step of separately fabricating the membrane core and housing before assembly, thus simplifying the production process. Simultaneously, the adhesive properties and mechanical strength of the cured epoxy resin effectively fix the ends of the membrane filaments and seal the gaps between them.

[0033] The injection and curing of the epoxy resin material are crucial for forming high-performance end caps. As a thermosetting polymer, the transformation of epoxy resin from liquid to solid depends on the cross-linking reaction with the curing agent. By controlling the type of curing agent and curing conditions, the final mechanical properties and chemical stability of the epoxy resin end cap 210 can be affected. The viscosity of the epoxy resin is an important parameter affecting its penetration into the membrane fiber bundle. By controlling the viscosity of the epoxy resin, its wetting effect on porous structures or complex geometries can be optimized. Selecting an appropriate viscosity helps the epoxy resin to fully and uniformly penetrate between the membrane fibers, reducing unfilled areas, thereby improving the overall quality and sealing reliability of the end cap.

[0034] In the assembly method, after or simultaneously with the formation of the epoxy resin end cap 210, a step may be included in setting a detachable end cap assembly 300 at the opening of the housing 100. This end cap assembly 300 typically includes components such as an end cap 310 and a sealing ring 320. The detachable design facilitates later maintenance of the assembly, such as inspection or replacement of the membrane fibers. Furthermore, if the end cap assembly 300 integrates an epoxy resin injection port, it allows for epoxy resin injection after the end cap assembly 300 has been initially installed and positioned, facilitating a more precise and controllable casting process.

[0035] In one specific embodiment, the method further includes setting the end cap assembly 300 at the openings at both ends of the housing 100. The epoxy resin injection port provided on the end cap assembly 300 provides a channel for the casting step after the initial assembly of the assembly. This structure allows epoxy resin material to be injected into the end regions of the hollow fiber membrane bundles 200 within the housing 100 through this dedicated inlet after the end cap assembly 300 is installed and positioned into the housing 100. This method places the casting process within the assembly stage, helping to ensure that the epoxy resin is filled more precisely between the membrane bundles, reducing deviations that may occur due to multiple positioning steps, thereby promoting the formation of a more uniform and dense epoxy resin end cap 210. Through specific selection of epoxy resin adhesive and casting processes, and using programmed temperature rise or gradient temperature rise curing treatment, the cured epoxy resin end cap 210 and tube sheet can achieve high mechanical and compressive strength.

[0036] Furthermore, a sealing liquid injection port 360 is added to the end cap assembly 300, supplemented by a sealing liquid overflow port, thus improving the end cap preparation process. Before injecting the epoxy resin material, the entire membrane assembly is placed vertically, and the sealing liquid is preferentially injected through the sealing liquid injection port 360. Utilizing the liquid's own weight and the vertical position, the sealing liquid fully covers and penetrates the end holes of the hollow fiber membrane filaments 200, effectively sealing their ends, before the epoxy resin material is injected. The overflow port is used to monitor the filling progress of the sealing liquid. When liquid flows steadily out of the overflow port, it can be determined that the sealing liquid has been basically filled, which helps ensure that the membrane filament end holes are fully covered by the sealing liquid, providing a foundation for subsequent epoxy resin casting, thereby optimizing the integrity and sealing effect of the final end cap.

[0037] The end cap assembly 300 includes a clamping portion 340 whose thickness gradually increases from the outermost side. After the end cap assembly 300 is installed, the thickness of the portion of the clamping portion 340 that compresses the epoxy resin end cap 210 is controlled between 40% and 65% of the thickness of the epoxy resin end cap 210. This structural feature plays a positive role in improving the reliability of the interface seal. During the installation of the end cap assembly 300, the clamping portion 340 can apply a continuous radial clamping force to the cured epoxy resin end cap 210. Its gradual thickness increase from the outside to the inside transition design allows it to more effectively convert the axial clamping force into a radial extrusion component during axial installation, further enhancing the interface seal effect between the resin end cap and the inner wall of the housing 100. Setting the depth ratio of the clamping portion 340 embedded in the epoxy resin end cap 210 within this range achieves sufficient clamping force to ensure a seal, while avoiding damage to the epoxy resin end cap 210 or the membrane fibers due to excessive extrusion. The curved surface fitting design of the clamping part 340 to the inner wall of the housing 100, and the use of a reinforcing member with good fit to the inner wall of the housing 100 to improve the overall structural strength and reduce the stress at the edge of the hole, increase the contact area with the housing 100, help to form a uniform clamping force distribution, and this curved transition structure with gradually varying thickness also helps to disperse stress when under pressure and reduce the risk of stress concentration.

[0038] As described above, this application provides an integrated hollow fiber membrane module and its assembly method. The module includes a shell with a gas outlet and openings at both ends, hollow fiber membrane filaments disposed within the shell, and end caps detachably installed at the openings of the shell. The ends of the hollow fiber membrane filaments are formed by directly injecting epoxy resin material between the membrane filament bundles disposed within the shell and then curing it to create integrally molded epoxy resin end caps. This integrated structure eliminates the need for a traditional separate metal membrane core shell, contributing to the lightweight design of the module and eliminating seams in split structures, thereby reducing potential leakage points.

[0039] The end cap assembly may include components such as end caps, sealing rings, and nuts, which mate with threaded joints on the housing to achieve a detachable connection for easy maintenance. The end cap assembly may further be equipped with epoxy resin injection ports and end-sealing liquid injection ports, and plugs to allow for sequential injection of the end-sealing liquid and epoxy resin, optimizing the end cap molding quality. Furthermore, the end cap assembly may be designed with a clamping part, which has a curved surface that conforms to the inner surface of the housing, and its thickness gradually increases from the outside to the inside. When the end cap assembly is installed, this clamping part can apply radial clamping force to the epoxy resin end cap, and its embedment depth into the end cap can be controlled within a specific range to enhance the reliability of the interface seal and help disperse stress.

[0040] The corresponding assembly method includes placing hollow fiber membrane filaments inside a shell, then directly injecting epoxy resin material between the two ends of the filament bundle and curing it to form a head. This method may also include setting the head assembly, injecting the sealing liquid and epoxy resin through its injection port, and using a clamping part to squeeze the epoxy resin head during installation. Optimizing the epoxy resin formulation and casting process, as well as using vertical placement and monitoring the filling status through an overflow port, helps to improve the density and integrity of the head. This application simplifies the production process by combining integrated molding with a detachable head assembly, achieving lightweight components while maintaining sealing reliability and ease of maintenance.

[0041] The above is only one specific implementation of this application, and any other improvements made based on the concept of this application shall be considered within the scope of protection of this application.

Claims

1. An integrated hollow fiber membrane module, characterized in that, Includes shell, hollow fiber membrane filaments, and end cap assembly; The housing includes a gas outlet and openings at both ends; The end cap assembly is detachably disposed at the opening of the housing; The hollow fiber membrane filaments are disposed inside the housing and have epoxy resin end caps at both ends; The epoxy resin end cap is formed by placing the hollow fiber membrane filaments inside the shell and then injecting epoxy resin material between the bundles of the hollow fiber membrane filaments and curing it.

2. The integrated hollow fiber membrane module according to claim 1, characterized in that, The end cap assembly includes an epoxy resin injection port.

3. The integrated hollow fiber membrane module according to claim 1, characterized in that, The end cap assembly also includes a clamping part having a surface that fits against the inner surface of the housing, and the thickness of the clamping part gradually increases from the outermost side.

4. The integrated hollow fiber membrane module according to claim 1, characterized in that, The end cap assembly includes an end cap, a sealing ring, and a nut, and the housing includes a threaded joint.

5. A method for assembling an integrated hollow fiber membrane module, characterized in that, include: A housing is provided, the housing including a gas outlet and openings at both ends; Hollow fiber membrane filaments are placed inside the housing; Epoxy resin material is injected between the filament bundles at both ends of the hollow fiber membrane filaments. The epoxy resin material is cured to form an epoxy resin end cap.

6. The assembly method of the integrated hollow fiber membrane module according to claim 5, characterized in that, It also includes end cap assemblies installed at the openings at both ends of the housing.

7. The assembly method of the integrated hollow fiber membrane module according to claim 6, characterized in that, The end cap assembly includes an epoxy resin injection port, through which epoxy resin material is injected after the end cap assembly is installed.

8. The assembly method of the integrated hollow fiber membrane module according to claim 7, characterized in that, The end cap assembly also includes an end capping liquid injection port. Before injecting the epoxy resin material, the assembly is placed vertically, and the end capping liquid is injected first, followed by the injection of the epoxy resin material.

9. The assembly method of the integrated hollow fiber membrane module according to claim 5, characterized in that, The end cap assembly also includes a pressing part, the thickness of which gradually increases from the outermost side. When the end cap assembly is set, the epoxy resin end cap is squeezed by the pressing part.

10. The assembly method of the integrated hollow fiber membrane module according to claim 9, characterized in that, One side of the clamping part is in close contact with the inner surface of the housing.

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