Helical wound membrane module for simultaneous separation of multiple components and its assembly method

Abstract

This invention relates to the field of low-carbon hydrocarbon separation and recovery, and discloses a spiral wound membrane module for simultaneous separation of multiple components and its assembly method. The module includes a membrane shell, a membrane element located within the membrane shell, end caps fixed to both ends of the membrane shell, and a central permeation tube. The central tube has symmetrical openings on its surface. The membrane shell has four inlets / outlets serving as a feed gas inlet, a retentate gas outlet, a second component purge gas inlet, and a second component purge gas outlet. Perforations are opened on both end caps, serving as a first component purge gas inlet and a first component purge gas outlet, respectively. The membrane element is circumferentially sealed using an intermittent seal, serving as a second component permeate gas outlet channel. The membrane element includes a feed separator, a first component separation membrane, a first component permeation separator, a second component separation membrane, and a second component permeation separator, wherein the feed separator serves as a feed compartment, the first component permeation separator serves as a first component permeation compartment, and the second component permeation separator serves as a second component permeation compartment.

Description

Technical Field

[0001] This invention relates to the field of low-carbon hydrocarbon separation and recovery, specifically to a spiral wound membrane module for simultaneous separation of multiple components and its assembly method. Background Technology

[0002] In the field of gas separation, with the diversification of industrial application demands, the simultaneous separation of multiple gas components has become an important research direction. Traditional gas separation technologies, such as adsorption, condensation, or chemical absorption, often struggle to efficiently separate multiple gas components simultaneously, and suffer from problems such as high energy consumption, complex equipment, and cumbersome operation. Therefore, developing a technology capable of simultaneously and efficiently separating multiple gas components is of paramount importance.

[0003] Gas separation membrane modules, as an emerging type of gas separation equipment, have shown great potential in the field of multi-component gas separation due to their advantages such as high efficiency, low energy consumption, and ease of operation. However, existing spiral-wound membrane modules, including conical strip membrane modules (CN 105344250 B), membrane modules with columnar reinforcements (CN 115779690B), seawater desalination membrane modules with biomimetic nets (CN 118561373 A), and detachable membrane modules with openable and closable structures (CN 115888397 B), are only optimized for single components and have limited capacity for the simultaneous separation of complex multi-components. To overcome this technical bottleneck and improve the competitiveness and economy of this technology, there is an urgent need to develop a spiral-wound membrane module for the simultaneous separation of multiple components. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a novel gas separation membrane module for the simultaneous separation of multiple gas components. This module achieves efficient and precise separation of various gas components through innovative membrane structure construction and flow channel innovation. The gas separation membrane module of the present invention can utilize selected membrane materials, combined with a unique flow channel layout, enabling multiple gas components to be separated at predetermined ratios and purities as they pass through the membrane module. These ratios and purities are determined by the membrane material. This design not only improves the simultaneous separation efficiency of multiple gas components but also significantly reduces energy consumption and operating costs, opening up new avenues for the development of gas separation technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] In a first aspect, the present invention provides a spirally wound membrane module for simultaneous separation of multiple components, comprising a membrane housing, a central permeation tube disposed within the membrane housing, and a membrane element spirally wound on the central permeation tube; an upper end cap and a lower end cap are disposed at both ends of the membrane housing, the central permeation tube is open at both ends, an air inlet is provided on the tube wall of the central permeation tube, a first component purge chamber is formed inside the central permeation tube, a first component purge gas inlet is provided on the upper end cap, and a first component purge gas outlet is provided on the lower end cap; and the outer ring of the central permeation tube and the inner ring of the membrane housing are sealed vertically, forming a second component purge chamber between the upper and lower seals, and a second component purge gas inlet and a second component purge gas outlet are provided on the membrane housing; the upper seal and the upper end cap are sealed vertically. A feed gas chamber is formed between the upper seal and the lower end cap; a tethered gas chamber is formed between the upper seal and the lower end cap; the membrane shell is provided with a feed gas inlet and a tethered gas outlet; the membrane element is a single membrane element, including a protective layer, a second component permeation barrier, a second component separation membrane, a feed barrier, a first component separation membrane, and a first component permeation barrier arranged sequentially from the outside to the inside; the first component permeation barrier is connected to and sealed with the central permeation tube to form a first component membrane bag; the second component permeation barrier is connected to and sealed with the second component purge gas chamber to form a second component membrane bag; the second component separation membrane, the feed barrier, and the first component separation membrane are connected to and sealed with the feed gas inlet and the tethered gas outlet to form a feed membrane bag.

[0007] As a further technical solution, the membrane element is a dual-group membrane element, including a second component permeation barrier, a second component separation membrane, a first feed barrier, a first component separation membrane, a first component permeation barrier, a first component separation membrane, a second feed barrier, and a second component separation membrane arranged sequentially from the outside to the inside.

[0008] As a further technical solution, the membrane element consists of three sets of membrane elements, arranged in the following order: protective layer, second component permeation barrier, second component separation membrane, first feed barrier, first component separation membrane, first component permeation barrier, first component separation membrane, second feed barrier, second component separation membrane, second component permeation barrier, second component separation membrane, third feed barrier, first component separation membrane, and first component permeation barrier.

[0009] As a further technical solution, the membrane element is a set of multiple membrane elements. When there is an even number of membrane elements, the protective layer is not included. When there is an odd number of membrane elements, the protective layer is included.

[0010] As a further technical solution, the membrane element is a multi-group membrane element. One side of the feed grid is a second component separation membrane, and the other side is a first component separation membrane. Adjacent first component separation membranes are separated by a first component permeation grid; adjacent second component separation membranes are separated by a second component permeation grid. The relationship between the number of membrane element layers and the number of groups is as follows: when it is an odd number of groups, y = 8n - 2 is satisfied; when it is an even number of groups, y = 8n - 8 is satisfied, where n is the number of groups and y is the number of layers.

[0011] As a further technical solution, sealing rings are provided between the upper end cover and the membrane shell, and between the lower end cover and the membrane shell.

[0012] As a further technical solution, sealing rings are provided between the upper end cap and the central permeation tube, and between the lower end cap and the central permeation tube.

[0013] Secondly, the present invention also provides an assembly method for a spiral wound membrane module for simultaneous separation of multiple components. The membrane element with a central permeation tube is assembled inside the membrane housing. An upper end cap and a lower end cap are assembled at both ends of the membrane element. A groove is provided at the connection between the upper end cap and the membrane housing, and an upper sealing O-ring is assembled thereon. A groove is provided at the connection between the upper end cap and the central permeation tube, and an upper sealing ring is assembled thereon. A groove is provided at the connection between the lower end cap and the central permeation tube, and a lower sealing ring is assembled thereon. A flexible upper sealing sleeve and a flexible lower sealing sleeve are assembled between the membrane element and the membrane housing.

[0014] As a further technical solution, the method for preparing the membrane element is as follows:

[0015] According to the set order, the layers of the membrane element are bonded together, and the upper and lower edges of the second component separation membrane and the feed separator are not bonded together, and the upper and lower edges of the feed separator and the first component separation membrane are not bonded together, while the rest are bonded together; then each membrane bag is spirally wound onto the central permeation tube to obtain the spiral wound membrane element composed of a single set of membrane elements.

[0016] As a further technical solution, the first component permeation mesh is bonded to and connected to the central permeation tube; the second component permeation mesh is connected to the second component purge gas chamber; the upper part of the second component separation membrane, the feed mesh, and the first component separation membrane is connected to the raw material gas inlet, and the lower part of the second component separation membrane, the feed mesh, and the first component separation membrane is connected to the intercepted gas outlet.

[0017] The beneficial effects of this invention are as follows:

[0018] This invention achieves the separation of different component gases through the design of the membrane element, membrane shell, and central permeation tube structure, and the cooperation between the membrane element, membrane shell, and central permeation tube; it not only improves the efficiency of simultaneous separation of multi-component gases, but also greatly reduces energy consumption and operating costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the spiral wound membrane module of the present invention;

[0020] Figure 2 This is a schematic diagram of the membrane element of the present invention;

[0021] Figure 3 A diagram illustrating the adhesive application scheme for the film bag of the present invention;

[0022] Figure 4 This is a schematic diagram of the material inlet and outlet of the present invention;

[0023] Figure 5 This is a schematic diagram of the material inlet / outlet and sealing ring arrangement within the membrane element of the present invention;

[0024] Figure 6 This is a schematic diagram of the material flow inside the feed film bag.

[0025] Wherein: 1, upper end cap; 2, upper sealing O-ring; 3, upper sealing ring; 4, upper sealing sleeve; 5, membrane element; 6, central permeation tube; 7, lower sealing sleeve; 8, lower sealing ring; 9, lower sealing O-ring; 10, lower end cap; 11, membrane shell; 501 protective layer; 502, second component permeation separator; 503, second component separation membrane; 504, feed separator; 505, first component separation membrane; 506, first component permeation separator; 507, sealing layer. Detailed Implementation

[0026] The technical solution of the present invention will be further illustrated below through specific embodiments.

[0027] The present invention provides a spiral wound membrane module for simultaneous separation of multiple components and its assembly method.

[0028] Example 1

[0029] See Figure 1 , Figure 2 , Figure 3The membrane module includes an upper end cap 1, an upper sealing O-ring 2, an upper sealing ring 3, an upper sealing sleeve 4, a membrane element 5, a central permeation tube 6, a lower sealing sleeve 7, a lower sealing ring 8, a lower sealing O-ring 9, a lower end cap 10, and a membrane shell 11. These components work together to form multiple chambers: a feed gas chamber, a retained gas chamber, a first component purge gas chamber, and a second component purge gas chamber; details are as follows:

[0030] A membrane element 5 with a central permeation tube 6 is located inside the membrane housing 11. The membrane element 5 is equipped with an upper end cap 1 and a lower end cap 10 at both ends. An upper annular chamber is formed between the upper end cap 1 and the top of the membrane element 5, and a lower annular chamber is formed between the lower end cap 10 and the bottom of the membrane element 5. The upper annular chamber is the feed gas chamber; the lower annular chamber is the intercepted gas chamber. To achieve sealing of these two chambers, a groove is provided at the connection between the upper end cap 1 and the membrane housing 11, and an upper sealing O-ring 2 is installed. The lower end cap 10 and the membrane... A groove is provided at the connection of the outer shell 11, and a lower sealing O-ring 9 is provided. The function of the upper sealing O-ring 2 and the lower sealing O-ring 9 is to seal the raw material gas chamber and the tethered gas chamber to prevent the raw material gas or tethered gas from leaking to the outside of the membrane module. Furthermore, the membrane outer shell 11 has a raw material gas inlet above the upper sealing sleeve 4, which is connected to the raw material gas chamber. The membrane outer shell 11 has a tethered gas outlet below the lower sealing sleeve 7, which is connected to the tethered gas chamber.

[0031] Furthermore, it also includes a first component purge gas chamber. Specifically, a first component purge gas inlet is provided along the central axis of the upper end cover 1, and a first component purge gas outlet is provided along the central axis of the lower end cover 10. The first component purge gas inlet and the first component purge gas outlet are connected to the central permeation pipe 6. The first component purge gas chamber is formed inside the central permeation pipe 6, and several air inlets are provided on the central permeation pipe 6. In order to prevent the gas from flowing between the raw material gas chamber and the chamber formed by the central permeation pipe 6, this embodiment provides a groove at the connection between the upper end cover 1 and the central permeation pipe 6 to install the upper sealing ring 3, and provides a groove at the connection between the lower end cover 10 and the central permeation pipe 6 to install the lower sealing ring 8. The function of the upper sealing ring 3 is to prevent the gas from flowing between the raw material gas chamber and the chamber of the central permeation pipe 6, and the function of the lower sealing ring 8 is to prevent the gas from flowing between the intercepted gas chamber and the chamber of the central permeation pipe 6.

[0032] Furthermore, it also includes a second component purge gas chamber. Specifically, an annular cavity is formed between the membrane element 5 and the membrane housing 11, and a flexible upper sealing sleeve 4 and a flexible lower sealing sleeve 7 are provided between the membrane element 5 and the membrane housing 11. The upper sealing sleeve 4, the lower sealing sleeve 7, and the annular cavity together constitute the second component purge gas chamber. The membrane housing 11 has a second component purge gas inlet at the lower part of the upper sealing sleeve 4 and a second component purge gas outlet at the upper part of the lower sealing sleeve 7. The inlet and outlet of the second component purge gas are both connected to the second component purge gas chamber. The upper sealing sleeve 4 and the lower sealing sleeve 7 are used to compensate for the unevenness of the membrane element surface caused by the final cross-section and the low roundness caused by the film winding. At the same time, they seal the second component purge gas chamber to prevent the gas in the second component purge gas chamber from mixing with the feed gas and the intercepted gas. The sidewall of the central permeate pipe 6 is provided with two or more rows of symmetrical air inlets, which serve as the channel for the first component permeate gas to enter the central permeate pipe 6.

[0033] Furthermore, in this embodiment, the membrane element 5 is a single-unit membrane element, arranged in the following order: protective layer 501, second component permeation membrane 502, second component separation membrane 503, feed membrane 504, first component separation membrane 505, and first component permeation membrane 506. The reverse side of the second component permeation membrane 502 presses against the front side of the protective layer 501, and the top and bottom edges are glued together. The reverse side of the second component separation membrane 503 presses against the front side of the second component permeation membrane 502, and the top and bottom edges and one vertical side are glued together. The reverse side of the feed membrane 504 presses against the front side of the second component separation membrane 503, sealing only the left and right sides, not the top and bottom edges. The reverse side of the first component separation membrane 505 presses against the front side of the feed membrane 504, sealing only the left and right sides, not the top and bottom edges. The sides are not sealed; the reverse side of the first component permeation separator 506 is pressed against the front side of the first component separation membrane 505, and the upper and lower sides and one of the vertical sides are glued together; the front side of the first component permeation separator 506 is connected to the central permeation tube, and the upper and lower sides are glued together; the second component permeation separator is connected to the second component purge gas chamber; wherein the protective layer 501, the second component permeation separator 502 and the second component separation membrane 503 form the second component membrane bag; the second component separation membrane 503, the feed separator 504 and the first component separation membrane 505 form the feed membrane bag; the first component separation membrane 505, the first component permeation separator 506 and the protective layer 501 form the first component membrane bag; then each membrane bag is spirally wound onto the central permeation tube to obtain the spiral wound membrane element composed of a single set of membrane elements.

[0034] Protective layer 501, second component permeation membrane 502, second component separation membrane 503, feed membrane 504, first component separation membrane 505, first component permeation membrane 506, bonded sealing line 507 (see details below) Figure 3 After the membrane element is wound up, it is sealed with sealing layer 507, and a flow channel for the second component permeate gas outlet is reserved. See details. Figure 5 ;

[0035] See Figure 4 , Figure 5 , Figure 6 The membrane module has six material inlets and outlets, namely the first component purge gas inlet, the first component purge gas outlet, the feed gas inlet, the tamper gas outlet, the second component purge gas inlet, and the second component purge gas outlet.

[0036] After the feed gas enters through the feed gas inlet, it enters the membrane element from the side of the central permeation tube 6 for separation. After selective separation by the first component separation membrane 505, it enters the central permeation tube 6 through the air inlet provided on the central permeation tube 6 along the first component permeation mesh 506. Then, it is purged out of the membrane module by the first component purge gas entering from above the membrane module, or the membrane module is extracted by vacuum.

[0037] The feed gas is selectively separated by the second component separation membrane 503 and then enters the second component purge gas chamber along the second component permeation mesh 502. It is then purged out of the membrane module by the second component purge gas, and the remaining retentate gas flows out of the membrane module through the retentate gas outlet.

[0038] See the material flow trend in the feed film bag. Figure 6 Specifically:

[0039] The feed gas enters the feed grid 504 in a direction parallel to the axis of the central permeation tube 6. The permeation gas passes through the selective separation membranes on both sides radially along the feed grid 504, and the retained gas flows out along the feed grid 504.

[0040] The material flow trend in the first component membrane bag, where one side of the first component permeation mesh 506 is the first component separation membrane 505 and the other side is the protective layer 501, is as follows: the protective layer 501 does not allow gas to pass through, and the rest is the same as the first component membrane bag where both sides are first component separation membranes 505; the second component membrane bag is the same as the first component membrane bag.

[0041] When using the spiral wound membrane module provided by the present invention, the membrane element with the central permeation tube is installed into the membrane shell. The central permeation tube is open at both ends, one end serving as the inlet of the first component purge gas and the other end serving as the outlet of the first component purge gas. The feed gas enters the feed membrane bag through the feed gas inlet. Separation is performed using permeation selectivity according to the different separation components of different separation membranes. The gas separated by the first component separation membrane enters the central permeation tube through the air inlet hole along the spiral path of the first component membrane bag for collection. The gas separated by the second component separation membrane enters the second component purge gas chamber along the spiral path of the second component membrane bag for collection.

[0042] Preferably, the thickness of the feed mesh 504 is 0.60-0.80 mm, for example, it can be 0.60 mm, 0.65 mm, 0.70 mm, 0.75 mm or 0.80 mm, but is not limited to the listed values. Other unlisted values ​​within the range are also applicable.

[0043] Preferably, the mesh width of the feed mesh 504 is 2.6-3.4 mm, for example, it can be 2.6 mm, 2.8 mm, 3.0 mm, 3.2 mm or 3.4 mm, but is not limited to the listed values. Other unlisted values ​​within the range are also applicable.

[0044] Preferably, the wire angle of the feed mesh 504 is 45-135°, for example, it can be 45°, 60°, 75°, 90°, 120° or 135°, but is not limited to the listed values. Other unlisted values ​​within the range are also applicable, preferably 90°.

[0045] Preferably, the feed mesh is made of polypropylene, polyethylene, polyester fiber, or polyphenylene sulfide.

[0046] Preferably, the thickness of the first component permeation barrier or the second component permeation barrier is 0.1-0.3 mm, for example, it can be 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm or 0.3 mm, but is not limited to the listed values. Other unlisted values ​​within the range are also applicable.

[0047] Preferably, the mesh width of the first component permeable barrier or the second component permeable barrier is 0.6-0.9 mm, for example, it can be 0.60 mm, 0.65 mm, 0.70 mm, 0.75 mm, 0.80 mm, 0.85 mm or 0.90 mm, but is not limited to the listed values. Other unlisted values ​​within the range are also applicable.

[0048] Preferably, the wire angle of the first component permeation barrier or the second component permeation barrier is 45-135°, for example, it can be 45°, 60°, 75°, 90°, 120° or 135°, but is not limited to the listed values. Other unlisted values ​​within the range are also applicable, preferably 90°.

[0049] Preferably, the feed mesh is made of polypropylene, polyethylene, polyester fiber, or polyphenylene sulfide.

[0050] Preferably, the width of the sealing layer is 1 / 31 to 1 / 5 of the membrane element length, that is, 1 / 31 to 1 / 5 of the length parallel to the axis of the central permeate tube. For example, it can be 1 / 31, 1 / 25, 1 / 19, 1 / 11, or 1 / 5 of the membrane element length, but is not limited to the listed values. Other unlisted values ​​within the range are also applicable.

[0051] Preferably, the sealing method is adhesive sealing or laser welding.

[0052] Preferably, the sealant is a two-component polyurethane adhesive.

[0053] This invention employs adhesive sealing or laser welding to avoid damaging the separation layer of the separation membrane and to ensure the sealing performance of the spiral wound membrane assembly.

[0054] Example 2

[0055] Similar to Example 1, the difference is that the membrane element is a dual-set membrane element, arranged in the following order: second component permeation separator 502, second component separation membrane 503, feed separator 504, first component separation membrane 505, first component permeation separator 506, first component separation membrane 505, feed separator 504, and second component separation membrane 503. The second component separation membrane 503, second component permeation separator 502, and second component separation membrane 503 form the second component membrane bag; the second component separation membrane 503, feed separator 504, and first component separation membrane 505 form the feed membrane bag; the first component separation membrane 505, first component permeation separator 506, and first component separation membrane 505 form the first component membrane bag; and the first component separation membrane 505, feed separator 504, and second component separation membrane 503 form the feed membrane bag. Then, each membrane bag is spirally wound onto the central permeation tube to obtain the spirally wound membrane element composed of two sets of membrane elements.

[0056] It should be noted that the sealing between the feed screen and the second component separation membrane, and between the first component separation membrane and the feed screen, is only on the left and right sides, not on the top and bottom sides.

[0057] In this embodiment, the material flow trend in the first component membrane bag, where both sides of the first component permeation mesh 506 are the first component separation membranes 505, is as follows: the permeate gas passing through the first component separation membranes 505 on both sides of the first component permeation mesh 506 enters the first component permeation mesh 506 and enters the central permeation pipe 6 through the air inlet provided on the central permeation pipe 6 along the first component permeation mesh 506.

[0058] Example 3

[0059] Similar to Example 1, except that there are three sets of membrane elements. These three sets of membrane elements are arranged and bonded in the following order: protective layer 501, second component permeation barrier 502, second component separation membrane 503, feed barrier 504, first component separation membrane 505, first component permeation barrier 506, first component separation membrane 505, feed barrier 504, second component separation membrane 503, second component permeation barrier 502, second component separation membrane 503, feed barrier 504, first component separation membrane 505, and first component permeation barrier 506. The protective layer 501, second component permeation barrier 502, and second component separation membrane 503 form the second component membrane bag; the second component separation membrane... 503, feed separator 504, and first component separation membrane 505 form a feed membrane bag; first component separation membrane 505, first component permeation separator 506, and first component separation membrane 505 form a first component membrane bag; first component separation membrane 505, feed separator 504, and second component separation membrane 503 form a feed membrane bag; second component separation membrane 503, second component permeation separator 502, and second component separation membrane 503 form a second component membrane bag; second component separation membrane 503, feed separator 504, and first component separation membrane 505 form a feed membrane bag; first component separation membrane 505, first component permeation separator 506, and protective layer 501 form a first component membrane bag. Then, each membrane bag is spirally wound onto the central permeation tube to obtain the spirally wound membrane element composed of two sets of membrane elements.

[0060] Furthermore, the membrane element can be designed as four or more groups of membrane elements. The specific arrangement rule is: when there are an even number of membrane elements, the protective layer is not included; when there are an odd number of membrane elements, the protective layer is included. The membrane element consists of multiple groups of membrane elements. One side of the feed separator is the second component separation membrane, and the other side is the first component separation membrane. Adjacent first component separation membranes are separated by a first component permeation separator; adjacent second component separation membranes are separated by a second component permeation separator. The relationship between the number of membrane element layers and the number of groups is: when there are odd numbers, y = 8n - 2; when there are even numbers, y = 8n - 8, where n is the number of groups and y is the number of layers.

[0061] It should be noted that the sealing between the feed screen and the second component separation membrane, and between the first component separation membrane and the feed screen, is only on the left and right sides, not on the top and bottom sides.

[0062] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spiral-wound membrane module for simultaneous separation of multiple components, characterized in that, The device includes a membrane housing, within which a central permeation tube is disposed, and a membrane element is spirally wound on the central permeation tube. The membrane housing has upper and lower end caps at both ends. The central permeation tube is open at both ends, with an air inlet on its wall. A first component purge chamber is formed inside the central permeation tube. A first component purge gas inlet is provided on the upper end cap, and a first component purge gas outlet is provided on the lower end cap. The outer ring of the central permeation tube and the inner ring of the membrane housing are sealed vertically, forming a second component purge chamber between the upper and lower seals. A second component purge gas inlet and a second component purge gas outlet are provided on the membrane housing. A feed gas chamber is formed between the upper seal and the upper end cap. A gas trapping chamber is formed between the upper seal and the lower end cap. The membrane shell is provided with a feed gas inlet and a gas trapping outlet. The membrane element is a single membrane element, including a protective layer, a second component permeation screen, a second component separation membrane, a feed screen, a first component separation membrane, and a first component permeation screen arranged sequentially from the outside to the inside. The first component permeation screen is connected to and sealed with the central permeation tube to form a first component membrane bag. The second component permeation barrier is connected to and sealed with the second component purge gas chamber to form a second component membrane bag; the second component separation membrane, feed barrier, and first component separation membrane are connected to the feed gas inlet and the intercepted gas outlet and sealed to form a feed membrane bag.

2. The helical wound membrane module for simultaneous separation of multiple components as described in claim 1, characterized in that, The membrane element is a dual-group membrane element, comprising, in sequence from the outside to the inside, a second component permeation barrier, a second component separation membrane, a first feed barrier, a first component separation membrane, a first component permeation barrier, a first component separation membrane, a second feed barrier, and a second component separation membrane.

3. The helical wound membrane module for simultaneous separation of multiple components as described in claim 1, characterized in that, The membrane element consists of three sets of membrane elements, arranged in the following order: protective layer, second component permeation barrier, second component separation membrane, first feed barrier, first component separation membrane, first component permeation barrier, first component separation membrane, second feed barrier, second component separation membrane, second component permeation barrier, second component separation membrane, third feed barrier, first component separation membrane, and first component permeation barrier.

4. The helical wound membrane module for simultaneous separation of multiple components as described in claim 1, characterized in that, The membrane element is a set of multiple membrane elements. When there is an even number of membrane elements, the protective layer is not included. When there is an odd number of membrane elements, the protective layer is included.

5. The helical wound membrane module for simultaneous separation of multiple components as described in claim 4, characterized in that, The membrane element is a multi-group membrane element. One side of the feed grid is the second component separation membrane, and the other side is the first component separation membrane. Adjacent first component separation membranes are separated by a first component permeation grid. Adjacent second component separation membranes are separated by a second component permeation grid. The relationship between the number of membrane element layers and the number of groups is as follows: when it is an odd number of groups, y = 8n - 2 is satisfied; when it is an even number of groups, y = 8n - 8 is satisfied, where n is the number of groups and y is the number of layers.

6. The spiral-wound membrane module for simultaneous separation of multiple components as described in claim 1, characterized in that, A sealing ring is provided between the upper end cover and the membrane shell, and between the lower end cover and the membrane shell for sealing.

7. The spiral-wound membrane module for simultaneous separation of multiple components as described in claim 1, characterized in that, A sealing ring is provided between the upper end cap and the central permeation tube, and between the lower end cap and the central permeation tube.

8. The assembly method of a helically wound membrane module for simultaneous separation of multiple components as described in any one of claims 1-7, characterized in that, A membrane element with a central permeation tube is assembled inside the membrane housing. An upper end cap and a lower end cap are fitted at both ends of the membrane element. The upper end cap has a groove where it connects to the membrane housing, and an upper sealing O-ring is fitted there. Similarly, the lower end cap has a groove where it connects to the membrane housing, and a lower sealing O-ring is fitted there. A flexible upper sealing sleeve and a flexible lower sealing sleeve are fitted between the membrane element and the membrane housing.

9. The assembly method of the helical wound membrane module for simultaneous separation of multiple components as described in claim 8, characterized in that, The preparation method of the membrane element is as follows: According to the set order, the layers of the membrane element are bonded together, and the upper and lower edges of the second component separation membrane and the feed separator are not bonded together, and the upper and lower edges of the feed separator and the first component separation membrane are not bonded together, while the rest are bonded together; then each membrane bag is spirally wound onto the central permeation tube to obtain a spiral wound membrane module composed of a single set of membrane elements.

10. The assembly method of the helical wound membrane module for simultaneous separation of multiple components as described in claim 9, characterized in that, The first component permeation mesh is bonded to and connected to the central permeation tube; the second component permeation mesh is connected to the second component purge gas chamber; the upper part of the second component separation membrane, the feed mesh, and the first component separation membrane is connected to the feed gas inlet, and the lower part of the second component separation membrane, the feed mesh, and the first component separation membrane is connected to the intercepted gas outlet.

Images