A structure of a two-stage organic gas separation membrane module

Abstract

This utility model relates to the field of spiral wound membrane technology and discloses a two-stage organic gas separation membrane module structure, including: a separation membrane sleeve and spiral wound separation membrane modules inserted into both ends of the separation membrane sleeve; sealing sleeves installed at both ends of the separation membrane sleeve to seal the spiral wound separation membrane modules. Utilizing the flange clamp membrane sleeve design of the spiral wound separation membrane module, the sealing sleeve and the separation membrane sleeve can clamp and seal the flange clamp membrane sleeve, preventing air leakage from the outside of the spiral wound separation membrane module and improving sealing performance. Simultaneously, by installing two sets of spiral wound separation membrane modules at both ends of the separation membrane sleeve, the gas separation efficiency is improved. Furthermore, the permeate membrane core tubes of the two sets of spiral wound separation membrane modules are not interconnected, allowing the ball valve of the damaged permeate return pipeline to be closed when one set of spiral wound separation membrane modules is damaged, while the other separation membrane module can still be used normally.

Description

Technical Field

[0001] This utility model relates to the field of spiral wound separation membrane technology, specifically a structure for a two-stage organic gas separation membrane assembly. Background Technology

[0002] Currently, spiral wound membrane modules used in the market are installed inside membrane sleeves. Typically, grooves are cut at both ends of the membrane in the spiral wound membrane module, and V-shaped sealing rings are fitted on them. During installation, the membrane is inserted into the membrane sleeve. Under working pressure, the V-shaped sealing rings seal against the inner wall of the sleeve, ensuring that organic gases pass through the inside of the spiral wound membrane, thereby achieving the gas separation effect. This prevents organic gases from passing through the outside of the spiral wound membrane module and being discharged without being separated by the membrane surface.

[0003] In traditional two-stage gas separation membrane modules, the two membrane core tubes are connected in series during installation. After membrane separation, the permeate return gas exits from one end of the membrane sleeve. However, in practical applications, due to the weight of the spiral wound membrane module itself, it often sags and becomes eccentric. Over long-term use, uneven stress around the V-shaped rubber ring and gas corrosion can easily cause damage, leading to leakage on the outer side of the membrane. Some organic gases bypass membrane separation and are emitted from the outer side, resulting in substandard emissions from the rear end of the membrane module.

[0004] However, since the membrane center tubes of the two separation membrane modules are connected in series and share a return gas pipe, when one of the separation membrane modules is damaged and the membrane sleeve valve needs to be closed, the other separation membrane module that is not damaged will be unusable because the membrane center tubes of the two separation membrane modules are connected in series and share a vent pipe. Therefore, we need to propose a two-stage organic gas separation membrane module structure. Utility Model Content

[0005] The purpose of this invention is to provide a two-stage organic gas separation membrane module structure that allows for flexible and quick installation of the two-stage separation membrane module. It also effectively solves the problem of external gas leakage after installation, ensuring that all gas flows through the internal channels of the separation membrane module. When one of the separation membrane modules is damaged, the permeate return gas pipeline valve of the damaged membrane module can be closed, while the other separation membrane module can be used normally, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a two-stage organic gas separation membrane module structure, comprising:

[0007] Separating membrane sleeve, and spiral wound separating membrane assembly inserted into both ends of the separating membrane sleeve;

[0008] A sealing sleeve installed at both ends of a separator membrane sleeve to seal the spiral-wound separator membrane assembly; the sealing sleeve is used for the flow of gas into and out of the spiral-wound separator membrane assembly.

[0009] The spiral wound separation membrane assembly includes a separation membrane center tube, a membrane body, a flange clamp membrane sleeve head, and a membrane tail sleeve head. The membrane body is sleeved on the outside of the separation membrane center tube and is positioned between the flange clamp membrane sleeve head and the membrane tail sleeve head. Multiple sets of airflow inlets are provided on opposite sides of the flange clamp membrane sleeve head and the membrane tail sleeve head.

[0010] Preferably, the membrane body includes a separation membrane body, an outer flow channel guide net, an inner flow channel guide cloth, and a resin shell. The inner flow channel guide cloth is disposed on the inner side of the separation membrane body, the outer flow channel guide net is disposed on the outer side of the separation membrane body, and the glass fiber resin shell is disposed on the outer side of the outer flow channel guide net.

[0011] Preferably, a membrane core tube blocking plate is provided at the end of the separation membrane central tube away from the sealing sleeve, and multiple sets of air holes are opened on the outer side of the separation membrane central tube.

[0012] Preferably, two sets of sealing gaskets for airflow are provided between the sealing sleeve and the separating membrane sleeve. The two sets of sealing gaskets are respectively provided on both sides of the flange clamp membrane sleeve head. The air inlet end of the sealing sleeve is provided with an external connecting conduit that communicates with the membrane center tube. One set of the sealing sleeves is provided with a raw material gas inlet pipe that communicates with the air inlet hole on its outer side.

[0013] Preferably, the inner cavity of the sealing sleeve is provided with a connecting sleeve for inserting the membrane center tube, and the inner wall of the connecting sleeve is embedded with two sets of O-rings.

[0014] Preferably, the outlet end of each of the external connecting conduits is provided with a permeate gas return pipe, and the outlet end of the permeate gas return pipe and the inlet end of the raw material inlet pipe are both provided with ball valves. Another set of sealing sleeves is provided with a tail gas exhaust pipe, and the inner cavity of the separation membrane sleeve is provided with an isolation part to prevent the two sets of separation membrane central tubes from touching.

[0015] Preferably, both the sealing sleeve and the separating membrane sleeve are provided with flanges at their mating ends, and multiple sets of connecting bolts are provided through both sets of flanges. One end of each set of connecting bolts is threaded with a lock nut, and the flange clamp membrane sleeve and the two sets of sealing gaskets are both disposed between the two sets of flanges.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention primarily utilizes the cooperation between the separation membrane sleeve, the spiral-wound separation membrane assembly, and the sealing sleeve. By leveraging the flange clamp membrane head design of the spiral-wound separation membrane assembly, the sealing sleeve and the separation membrane sleeve can clamp and seal the flange clamp membrane head, preventing air leakage from the outside of the spiral-wound separation membrane assembly and improving sealing performance. Simultaneously, by installing two sets of spiral-wound separation membrane assemblies at both ends of the separation membrane sleeve, the gas separation efficiency is improved. Furthermore, the permeate membrane core tubes of the two sets of spiral-wound separation membrane assemblies are not interconnected, allowing the ball valve of the damaged permeate return pipeline to be closed when one set of spiral-wound separation membrane assemblies is damaged, while the other separation membrane assembly can continue to function normally. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the cross-sectional structure of the separation membrane sleeve of this utility model;

[0019] Figure 2 This is a front cross-sectional view of the spiral wound separation membrane assembly of this utility model.

[0020] Figure 3 for Figure 1 Enlarged structural diagram at point A;

[0021] Figure 4 This is a schematic diagram of the left-side cross-sectional structure of the separation membrane assembly of this utility model.

[0022] In the diagram: 1. Separator membrane sleeve; 2. Spiral wound membrane assembly; 21. Separator membrane center tube; 22. Separator membrane body; 23. Outer flow channel guide net; 24. Inner flow channel guide cloth; 25. Flange clamp membrane sleeve; 26. Membrane core tube plug; 27. Air inlet; 28. Fiberglass resin shell; 29. ​​Membrane tail sleeve; 3. Sealing sleeve; 4. External connecting conduit; 5. Connecting sleeve; 6. O-ring seal; 7. Sealing gasket; 8. Connecting bolt; 9. Locking nut; 10. Permeate return pipe; 11. Raw material gas inlet pipe; 12. Ball valve; 13. Tail gas exhaust pipe. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-4 This utility model provides a technical solution: a two-stage organic gas separation membrane module structure, comprising:

[0025] Separating membrane sleeve 1, and spiral wound separating membrane assembly 2 inserted into both ends of separating membrane sleeve 1;

[0026] Sealing sleeves 3 are installed at both ends of the separator sleeve 1 to seal the spiral separator assembly 2. The sealing sleeves 3 are used for the flow of gas into and out of the spiral separator assembly 2.

[0027] The spiral wound membrane assembly 2 includes a separation membrane center tube 21, a membrane body, a flange clamp membrane sleeve 25, and a membrane tail sleeve 29. The membrane body is sleeved on the outside of the separation membrane center tube 21 and is positioned between the flange clamp membrane sleeve 25 and the membrane tail sleeve 29. Multiple sets of airflow inlets 27 are provided on opposite sides of the flange clamp membrane sleeve 25 and the membrane tail sleeve 29. The spiral wound membrane assembly 2 is inserted into both ends of the separation membrane sleeve 1. The separation membrane sleeve 1 provides support and protection for the spiral wound membrane assembly 2. Organic gases are separated in the spiral wound membrane assembly 2. The separation membrane center tube 21 is used to collect permeate. The separation membrane sleeve 1 protects the spiral wound membrane assembly 2 from external environmental influences, extending its service life. The spiral wound structure increases the membrane packing density and improves the separation efficiency.

[0028] The membrane body includes a separation membrane body 22, an outer flow channel guide net 23, an inner flow channel guide cloth 24, and a resin shell 28. The inner flow channel guide cloth 24 is disposed on the inner side of the separation membrane body 22, the outer flow channel guide net 23 is disposed on the outer side of the separation membrane body 22, and the glass fiber resin shell 28 is disposed on the outer side of the outer flow channel guide net 23. The membrane body is sleeved on the outer side of the separation membrane central tube 21. The glass fiber resin shell 28 is made by winding glass fiber epoxy resin and then curing it.

[0029] The feed gas enters the membrane body through the air inlet holes 27 on the flange clamp membrane sleeve head 25 and the membrane tail sleeve head 29. The inner flow channel guide cloth 24 and the outer flow channel guide net 23 are respectively set on the inner and outer sides of the separation membrane body 22 to guide the gas flow and improve the separation efficiency. The separated permeate gas enters the pipe through the air holes on the separation membrane central tube 21 and is then discharged through the external connecting pipe 4. The membrane structure is reasonably designed, which increases the contact area between the gas and the separation membrane and improves the separation efficiency. The setting of the inner flow channel guide cloth 24 and the outer flow channel guide net 23 optimizes the gas flow path and reduces the gas flow resistance.

[0030] A membrane core tube plug plate 26 is provided at the end of the separation membrane center tube 21 away from the sealing sleeve 3. Multiple sets of air holes are opened on the outside of the separation membrane center tube 21 to facilitate the flow of gas.

[0031] Two sets of sealing gaskets 7 are provided between the sealing sleeve 3 and the separation membrane sleeve 1 to allow airflow. The two sets of sealing gaskets 7 are respectively provided on both sides of the flange clamp membrane sleeve head 25. The air inlet end of the sealing sleeve 3 is provided with an external connecting conduit 4 that is connected to the membrane center tube. One set of sealing sleeve 3 is provided with a raw material gas inlet pipe 11 that is connected to the air inlet hole 27. The gas enters the sealing sleeve 3 first through the raw material gas inlet pipe and enters the membrane body through the air inlet hole 27 on the flange clamp membrane sleeve head 25. After the gas permeates the membrane body, it enters the separation membrane center tube 21 and is discharged through the external connecting conduit 4 and the permeate gas return pipe 10.

[0032] The inner cavity of the sealing sleeve 3 is provided with a connecting sleeve 5 for the membrane center tube to be inserted. Two sets of O-rings 6 are embedded in the inner wall of the connecting sleeve 5. A sealing gasket 7 is placed between the sealing sleeve 3 and the separation membrane sleeve 1 to prevent gas leakage. The O-rings are embedded in the inner wall of the connecting sleeve 5 to ensure the seal between the membrane center tube and the connecting sleeve 5. The use of the sealing gasket 7 and the O-rings improves the sealing performance of the entire component and ensures the gas separation effect.

[0033] The outlet end of the external connecting conduit 4 is equipped with a permeate return pipe 10. Both the outlet end of the permeate return pipe 10 and the inlet end of the raw material inlet pipe are equipped with ball valves 12. Another set of sealing sleeves 3 is equipped with a tail gas exhaust pipe 13. The inner cavity of the separation membrane sleeve 1 is equipped with an isolation part to prevent the two sets of separation membrane center tubes 21 from touching. The isolation part can separate the separation membrane center tubes 21 of the two sets of spiral separation membrane assemblies 2, so that the separation membrane center tubes 21 of the two sets of spiral separation membrane assemblies 2 are not connected, thus making the two sets of spiral separation membrane assemblies 2 into two single components. The setting of the isolation part improves the separation effect and ensures that each spiral separation membrane assembly 2 works independently.

[0034] Both the sealing sleeve 3 and the separating membrane sleeve 1 are provided with flanges, and multiple sets of connecting bolts 8 are installed through both sets of flanges. One end of each set of connecting bolts 8 is threaded with a lock nut 9. The flange clamping membrane sleeve head 25 and the two sets of sealing gaskets 7 are both placed between the two sets of flanges. The flanges clamp the sealing gaskets 7, and the sealing gaskets 7 clamp the flange clamping membrane sleeve head 25, thereby achieving a seal on the spiral separating membrane assembly 2 and preventing air leakage.

[0035] In operation, the feed gas enters the sealing sleeve 3 through the feed gas inlet pipe 11, and then enters the first-stage spiral wound separator membrane module (near the feed gas inlet pipe) through the airflow inlet holes 27 on the flange clamp membrane sleeve head 25 and the membrane tail sleeve head 29. The organic gas is separated under the action of the first-stage spiral wound separator membrane module 2. The inner flow channel guide cloth 24 and the outer flow channel guide net 23 assist the flow of gas within the membrane body. The separated permeate enters the separator membrane center tube 21 through the vent holes on the separator membrane center tube 21, and then exits through the external connecting conduit 4 and the permeate return pipe 10. After separation by the first-stage spiral wound separator membrane module 2, the organic gas is further separated in the second stage... The tail end of the first-stage spiral wound separation membrane module (near the exhaust pipe) enters the separation membrane body 22 for further separation of organic gases. The separated permeate is discharged through the separation membrane center tube 21 of the second-stage spiral wound separation membrane module. The remaining exhaust gas after separation by the second-stage spiral wound separation membrane module 2 is discharged through the exhaust pipe 13. The sealing sleeve 3 and the separation membrane sleeve 1 are sealed by the sealing gasket 7 to improve the sealing effect of the spiral wound separation membrane module 2. At the same time, the O-ring seal is used to ensure the sealing between the membrane center tube and the connecting sleeve 5 to avoid external air leakage after the spiral wound separation membrane module 2 is installed, and to ensure stable and efficient gas separation.

[0036] When one set of spiral wound separation membrane assembly 2 is damaged, the ball valve 12 of that spiral wound separation membrane assembly 2 is closed, and then the other set of spiral wound separation membrane assembly 2 continues to work, avoiding the situation in the prior art where the two sets of separation membrane assemblies share a set of return gas pipes, which would cause both sets of separation membrane assemblies to become unusable.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A structure for a two-stage organic gas separation membrane module, characterized in that, include: Separating membrane sleeve (1), and spiral-wound separating membrane assembly (2) inserted into both ends of separating membrane sleeve (1); A sealing sleeve (3) is installed at both ends of the separation membrane sleeve (1) to seal the spiral separation membrane assembly (2), and the sealing sleeve (3) is used for the flow of gas into and out of the spiral separation membrane assembly (2); The spiral-wound separation membrane assembly (2) includes a separation membrane center tube (21), a membrane body, a flange clamp membrane sleeve (25), and a membrane tail sleeve (29). The membrane body is sleeved on the outside of the separation membrane center tube (21) and is located between the flange clamp membrane sleeve (25) and the membrane tail sleeve (29). Multiple sets of airflow inlets (27) are opened on the opposite side of the flange clamp membrane sleeve (25) and the membrane tail sleeve (29).

2. The structure of a secondary organic gas separation membrane module according to claim 1, characterized in that: The membrane body includes a separation membrane body (22), an outer flow channel guide net (23), an inner flow channel guide cloth (24), and a glass fiber resin shell (28). The inner flow channel guide cloth (24) is disposed on the inner side of the separation membrane body (22), the outer flow channel guide net (23) is disposed on the outer side of the separation membrane body (22), and the glass fiber resin shell (28) is disposed on the outer side of the outer flow channel guide net (23).

3. The structure of a secondary organic gas separation membrane module according to claim 2, characterized in that: The separation membrane center tube (21) is provided with a membrane core tube plug plate (26) at the end away from the sealing sleeve (3), and multiple sets of air holes are opened on the outside of the separation membrane center tube (21).

4. The structure of a secondary organic gas separation membrane module according to claim 3, characterized in that: Two sets of sealing gaskets (7) are provided between the sealing sleeve (3) and the separation membrane sleeve (1) for airflow to pass through. The two sets of sealing gaskets (7) are respectively provided on both sides of the flange clamp membrane sleeve head (25). The air inlet end of the sealing sleeve (3) is provided with an external connecting conduit (4) connected to the membrane center tube. One set of the sealing sleeve (3) is provided with a raw material gas inlet pipe (11) connected to the air inlet hole (27) on the outside.

5. The structure of a secondary organic gas separation membrane module according to claim 4, characterized in that: The inner cavity of the sealing sleeve (3) is provided with a connecting sleeve (5) for inserting the membrane center tube, and the inner wall of the connecting sleeve (5) is provided with two sets of O-ring seals (6).

6. The structure of a secondary organic gas separation membrane module according to claim 5, characterized in that: The outlet end of the external connecting conduit (4) is provided with a permeate return pipe (10). The outlet end of the permeate return pipe (10) and the inlet end of the raw material inlet pipe are both provided with ball valves (12). Another set of sealing sleeves (3) is provided with a tail gas exhaust pipe (13). The inner cavity of the separation membrane sleeve (1) is provided with an isolation part to prevent the two sets of separation membrane central tubes (21) from touching.

7. The structure of a secondary organic gas separation membrane module according to claim 6, characterized in that: Both the sealing sleeve (3) and the separating membrane sleeve (1) are provided with flanges, and multiple sets of connecting bolts (8) are provided through both sets of flanges. One end of each set of connecting bolts (8) is threaded with a locking nut (9). The flange clamp membrane sleeve head (25) and the two sets of sealing gaskets (7) are both located between the two sets of flanges.

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