Stacked membrane module and oil gas recovery treatment system

Abstract

The utility model discloses a stacked membrane module and an oil gas recovery processing system, and relates to the field of oil gas recovery, the key points of the technical scheme are as follows: the stacked membrane module comprises a cubic shell; an air inlet is formed in the lower end in the shell; a central pipe is arranged in the middle of the shell; one end of the central pipe is blocked, and the other end is an air return port; the air return port is arranged outside the shell; a through hole is formed in the central pipe; an exhaust port is formed in the top of the shell; the device further comprises a separation unit; the separation unit comprises a film bag and a flow guide plate; the flow guide plate is square; the guide plate is arranged in the shell, and an opening is formed in one end of the guide plate; a through hole matched with the central pipe is formed in the middle of the guide plate; airflow can flow from the lower part of the guide plate to the upper part of the guide plate through the opening; comprising at least two guide plates; openings of the two flow guide plates are formed in the opposite sides of the shell. The film bag is arranged between the two flow guide plates; an opening is formed in the middle of the film bag; and a plurality of membrane bag stacks are connected through the central pipe to form a membrane stack. The purpose of convenient replacement is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas recovery, and more specifically, it relates to a stacked membrane module and an oil and gas recovery treatment system. Background Art

[0002] The application of membrane modules in oil and gas recovery systems is a major highlight of modern environmental protection technologies. Its core principle lies in the use of carefully designed membrane materials to achieve precise separation of oil and gas from air by taking advantage of the differences in the permeability of different gas molecules. The efficiency of this technology lies in the selective permeability of its membrane materials. During the oil and gas recovery process, oil and gas molecules can preferentially pass through the membrane layer and thus be effectively collected, while air is discharged through the other side of the membrane, ensuring environmental protection standards for tail gas emissions. There are many common types of membrane modules, such as tubular membrane modules, which have a simple structure and are convenient for large-scale applications; spiral wound (rolled) membrane modules, which are favored for their high surface area utilization efficiency; and hollow fiber membrane modules, which have a unique structure and excellent mass transfer performance. However, in practical applications, these membrane modules also face the inconvenience of replacing membrane materials. Due to the structural complexity of the membrane module and the particularity of the installation location, replacing membrane materials often requires professional operation and takes a long time, which undoubtedly increases the maintenance cost and complexity of the system. Content of the Utility Model

[0003] The purpose of the utility model is to provide a stacked membrane module, which solves the problem of inconvenient replacement of membrane materials.

[0004] The above technical purpose of the utility model is achieved through the following technical solutions: a stacked membrane module, the stacked membrane module includes a housing, and the housing is in a cube shape; an air inlet is arranged at the lower end inside the housing; a central tube is arranged in the middle of the housing; one end of the central tube is blocked, and the other end is a return air port; the return air port is arranged outside the housing; through holes are arranged on the central tube; an exhaust port is arranged at the top of the housing; a separation unit is further included; the separation unit includes a membrane bag and a flow guide plate; the flow guide plate is square; the flow guide plate is arranged inside the housing, and an opening is arranged at one end of the flow guide plate; a perforation matching the central tube is arranged in the middle of the flow guide plate; air flow can flow from below the flow guide plate to above the flow guide plate through the opening; at least two flow guide plates are included; the openings of the two flow guide plates are on opposite sides of the housing; the membrane bag is arranged between the two flow guide plates; an opening is arranged in the middle of the membrane bag; a plurality of membrane bags are stacked and connected by the central tube to form a membrane stack. The surface of the membrane leaf is a membrane material.

[0005] Further, four flow guide plates are included; the opening positions of adjacent flow guide plates are on opposite sides of the housing; membrane stacks are arranged between the flow guide plates.

[0006] Further, an installation platform is provided inside the housing; a first sealing groove is provided on the installation platform; a second sealing groove corresponding to the first sealing groove is provided on the flow guide plate; a first sealing ring is provided between the first sealing groove and the second sealing groove; the flow guide plate is connected to the installation platform by screws.

[0007] Further, an annular sealing groove is provided on the side wall of the perforation; a second sealing ring is provided in the annular sealing groove.

[0008] Further, the membrane bag includes two membrane leaves; the edges of the two membrane leaves are connected, and the middle opening is not connected to form a membrane bag; a flow guide net is provided between the membrane leaves; the flow guide net is a non-woven fabric net.

[0009] Further, a support gasket is further included; the support gasket is annular; positioning holes and positioning pins are evenly spaced on the support gasket; the support gaskets are stacked and staggered, and the positioning pins of the lower layer are inserted into the positioning holes of the upper layer; the membrane bag is arranged between two layers of support gaskets; the middle opening of the membrane bag is aligned with the inner circle of the support gasket; a third sealing groove is provided on the inner wall of the support gasket; a third sealing ring is provided in the third sealing groove; the third sealing ring abuts against the central tube; multiple layers of through holes are provided along the axis on the central tube; each layer of through holes includes multiple through holes; each layer of through holes is located between two layers of support gaskets; the third sealing ring is located between two layers of through holes.

[0010] Further, the membrane leaf includes a reinforcing layer and a separation layer; the reinforcing layer is made of one of the materials of PSF, PEI, and PAN; the separation layer covers the reinforcing layer; the separation layer is made of PDMS or POMS material.

[0011] In a second aspect, the present invention provides an oil and gas recovery treatment system, including an air extraction pump, a membrane module, and a vacuum pump; the oil and gas recovery system is used for an oil storage tank; the membrane module is any one of the above-mentioned stacked membrane modules; one end of the air extraction pump is communicated with the oil storage tank, and the other end is communicated with the air inlet of the stacked membrane module; one end of the vacuum pump is communicated with the air return port of the stacked membrane module, and the other end is communicated with the oil storage tank; a vent valve is provided on the exhaust port of the stacked membrane module.

[0012] In summary, the present invention has the following beneficial effects:

[0013] 1. This design enables that when a certain membrane bag is damaged due to long-term use or improper operation, the user does not need to replace the entire membrane module, but only needs to independently replace the damaged membrane bag. This not only greatly reduces the maintenance cost, but also improves the convenience and efficiency of maintenance.

[0014] 2. The form of independent membrane bag stacking greatly improves the convenience of membrane bag disassembly. Each membrane bag is an independent unit, and they are stacked with each other through a carefully designed connection structure, which not only ensures the overall stability and sealing performance, but also makes the disassembly process very simple. Whether for daily maintenance or in-depth cleaning, users can easily disassemble the membrane bag without complex tools or techniques.

[0015] 3. The design of independent membrane bags also has obvious advantages. Since each membrane bag can be disassembled independently, users can conveniently remove the membrane bag that needs to be cleaned for in-depth cleaning or disinfection treatment. This not only ensures the cleanliness of the membrane module, extends its service life, but also ensures the stability and reliability of the filtration effect.

[0016] 4. The membrane module in the form of independent membrane bag stacking also has higher flexibility and scalability. Users can, according to actual needs, choose different numbers or different thicknesses of membrane bags for stacking to meet different filtration requirements. This design makes the applicable range of the membrane module wider and can better meet the needs of various application scenarios. Description of the Drawings

[0017] Figure 1 is a cross-sectional view of the stacked membrane module in the embodiment

[0018] Figure 2 is Figure 1 partial enlarged view

[0019] Figure 3 Schematic diagram of the flow guide plate

[0020] Figure 4 is a schematic diagram of the support gasket

[0021] Figure 5 is a cross-sectional view of the support gasket

[0022] Figure 6 is a cross-sectional view of the membrane bag

[0023] Figure 7 is a schematic diagram of the oil and gas recovery treatment system

[0024] In the figure: 1. Shell; 11. Air inlet; 12. Return air port; 13. Exhaust port; 131. Through hole; 14. Installation table; 15. Central pipe; 16. First sealing ring; 2. Flow guide plate; 21. Opening; 22. Perforation; 23. Second sealing ring; 3. Membrane stack; 31. Support gasket; 311. Positioning hole; 312. Positioning pin; 32. Membrane bag; 321. Separation layer; 322. Reinforcement layer; 323. Flow guide net; 33. Third sealing ring; 41. Oil storage tank; 42. Air extraction pump; 43. Vacuum pump; 44. Stacked membrane module. Detailed Embodiment

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component, and this "connection" does not limit fixed connection or movable connection. The specific connection method should be determined according to the specific technical problems to be solved.

[0027] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0028] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined. Embodiment

[0029] This embodiment first provides a stacked membrane module 44. The stacked membrane module 44 includes a housing 1, and the housing 1 is in a cubic shape. An air inlet 11 is provided at the lower end inside the housing 1. A central tube 15 is provided in the middle of the housing 1. One end of the central tube 15 is blocked, and the other end is a return air port 12. The return air port 12 is provided outside the housing 1. Through holes 131 are provided on the central tube 15. An exhaust port 13 is provided at the top of the housing 1. It further includes a separation unit. The separation unit includes a membrane bag 32 and a flow guide plate 2. The flow guide plate 2 is square. The flow guide plate 2 is arranged inside the housing 1, and an opening 21 is provided at one end of the flow guide plate 2. A perforation 22 matching the central tube 15 is provided in the middle of the flow guide plate 2. Airflow can flow from below the flow guide plate 2 to above the flow guide plate 2 through the opening 21. There are at least two flow guide plates 2. The openings 21 of the two flow guide plates 2 are on opposite sides of the housing 1. The membrane bag 32 is arranged between the two flow guide plates 2. An opening is provided in the middle of the membrane bag 32. Multiple membrane bags 32 are stacked and connected through the central tube 15 to form a membrane stack 3. In this embodiment, the housing 1 is cubic, and the flow guide plate 2 and the membrane bag 32 are square to adapt to it, enabling the airflow from the air inlet side to the air outlet side of the membrane bag 32 to completely pass through the entire surface of the membrane bag 32, improving the utilization rate of the membrane bag 32.

[0030] In this embodiment, there are four flow guide plates 2, and the four flow guide plates 2 are arranged vertically and horizontally. The positions of the openings 21 of adjacent flow guide plates 2 are on opposite sides of the housing 1. A membrane stack 3 is arranged between the flow guide plates 2. In this solution, the airflow needs to pass through each layer of the flow guide plate 2, and its path is in an S shape. A membrane stack 3 is arranged between the flow guide plates 2. This arrangement of the solution can make the airflow traverse all the membrane stacks 3, achieving full separation of the gas.

[0031] In this embodiment, an installation table 14 is provided inside the housing 1. A first sealing groove is provided on the installation table 14. A second sealing groove corresponding to the first sealing groove is provided on the flow guide plate 2. A first sealing ring 16 is provided between the first sealing groove and the second sealing groove. The flow guide plate 2 is connected to the installation table 14 by screws. This arrangement of the solution can prevent the airflow from entering the next layer of the flow guide plate 2 through the gap between the flow guide plate 2 and the housing 1, reducing the separation efficiency.

[0032] In this embodiment, an annular sealing groove is provided on the side wall of the perforation 22. A second sealing ring 23 is provided in the annular sealing groove. This arrangement of the solution can prevent the unseparated gas from entering the central tube 15 through the gap between the flow guide plate 2 and the central tube 15, reducing the separation quality.

[0033] In this embodiment, the membrane bag 32 includes two membrane leaves; the edges of the two membrane leaves are connected, and the middle opening 21 is not connected, forming the membrane bag 32; a flow guide net 323 is arranged between the membrane leaves; the flow guide net 323 is a non-woven fabric net. Through the flow guide net 323, the separated gas can flow between the membrane leaves and conveniently enter the central tube 15 through the opening 21. At the same time, the non-woven fabric also plays a role in supporting the membrane leaves.

[0034] In this embodiment, it further includes a support gasket 31; the support gasket 31 is annular; positioning holes 311 and positioning pins 312 are evenly arranged at intervals on the support gasket 31; the support gaskets 31 are stacked and staggered, and the positioning pins 312 of the lower layer are inserted into the positioning holes 311 of the upper layer; the membrane bag 32 is arranged between two support gaskets 31; the middle opening 21 of the membrane bag 32 is aligned with the inner circle of the support gasket 31; a third sealing groove is arranged on the inner wall of the support gasket 31; a third sealing ring 33 is arranged in the third sealing groove; the third sealing ring 33 abuts against the central tube 15; a plurality of layers of through holes 131 are arranged along the axis on the central tube 15; each layer of through holes 131 includes a plurality of through holes 131; each layer of through holes 131 is located between two support gaskets 31; the third sealing ring 33 is located between two layers of through holes 131. Through the third sealing ring 33, other unseparated substances can be prevented from entering the central tube 15 through the gaps on the support gasket 31 and polluting the separated gas.

[0035] In this embodiment, the membrane leaf includes a reinforcing layer 322 and a separation layer 321; the reinforcing layer 322 is made of one material among PSF, PEI, and PAN; the separation layer 321 covers the reinforcing layer 322; the separation layer 321 is made of PDMS or POMS material. The reinforcing layer 322 is used to support the separation layer 321, so that the separation layer 321 can better adhere, maintain a flat state, and ensure that the thickness of the separation layer 321 on the membrane leaf is uniform.

[0036] During use, the gas to be separated enters the housing 1 through the air inlet 11 and flows along an S-shaped path in the housing 1 under the guidance of the flow guide plate 2; during the flowing process, it passes through the membrane bag 32, and the membrane material on the surface of the membrane bag 32 allows the separated gas to pass through; the separated gas enters the central tube 15 through the opening 21 in the middle of the membrane bag 32; after the central tube 15 collects the gas, the separated gas is discharged through the gas return port 12. The remaining gas is discharged through the exhaust port 13.

[0037] This embodiment also provides an oil and gas recovery treatment system for the gasoline storage tank 41. It includes an air extraction pump 42, a membrane module, and a vacuum pump 43; the membrane module adopts the stacked membrane module 44 provided in this embodiment. One end of the air extraction pump 42 is connected to the storage tank 41, and the other end is connected to the air inlet 11 of the stacked membrane module 44; one end of the vacuum pump 43 is connected to the air return port 12 of the stacked membrane module 44, and the other end is connected to the storage tank 41; a vent valve is provided on the exhaust port 13 of the stacked membrane module 44. A first slide valve is provided between the air extraction pump 42 and the storage tank 41; a second slide valve is provided between the vacuum pump 43 and the oil pipe; a third slide valve is provided between the vent valve and the membrane module. It also includes a pressure monitoring device for monitoring the pressure inside the storage tank 41.

[0038] When the internal pressure of the storage tank 41 rises to the set start-up value, the air extraction pump 42 and the vacuum pump 43 are started, and the oil and gas enter the membrane module. Under the suction of the vacuum pump 43, the polymer oil and gas are precipitated through the membrane surface and then return to the underground tank, while the air cannot be precipitated through the membrane module and is directly discharged up to the standard.

[0039] The advantages of this embodiment are as follows: by adopting a square membrane bag, the utilization rate of the membrane bag is improved. The independently installed membrane bag is convenient for maintenance and replacement, and it is also convenient to clean the membrane bag. By combining membrane bags with different thicknesses, the application range of the membrane module can be wider.

[0040] This specific embodiment is only an interpretation of the present invention, and it is not a limitation of the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A stacked membrane module, characterized in that: The stacked membrane assembly comprises a shell, which is in a cubic shape; an air inlet is arranged at the lower end of the shell; a central tube is arranged in the middle of the shell; one end of the central tube is blocked, and the other end is an air return port; the air return port is arranged outside the shell; a through hole is arranged on the central tube; an exhaust port is arranged on the top of the shell; The stacked membrane assembly also includes a separation unit; the separation unit includes a membrane bag and a guide plate; the guide plate is square; the guide plate is arranged in the shell, and an opening is arranged at one end of the guide plate; a perforation matching the central tube is arranged in the middle of the guide plate; the airflow can flow from the bottom of the guide plate to the top of the guide plate through the opening; there are at least two guide plates; the openings of the two guide plates are on opposite sides of the shell; the membrane bag is arranged between the two guide plates; An opening is provided in the middle of the film bag; Multiple membrane bags are stacked and connected by a central tube to form a membrane stack.

2. A stacked membrane assembly according to claim 1, characterized in that: It comprises four guide plates; the openings of adjacent guide plates are located on opposite sides of the shell; and membrane stacks are arranged between the guide plates.

3. A stacked membrane assembly according to claim 2, characterized in that: A mounting platform is arranged in the shell; a first sealing groove is arranged on the mounting platform; a second sealing groove corresponding to the first sealing groove is arranged on the guide plate; a first sealing ring is arranged between the first sealing groove and the second sealing groove; and the guide plate is connected to the mounting platform by screws.

4. A stacked membrane assembly according to claim 3, characterized in that: The perforated side wall is provided with an annular sealing groove; a second sealing ring is provided in the annular sealing groove.

5. The stacked membrane assembly according to claim 1, characterized in that: The membrane bag comprises two membrane leaves; the edges of the two membrane leaves are connected, and the middle opening is not connected to form a membrane bag; A flow guide net is arranged between the membrane leaves; the flow guide net is a non-woven fabric net.

6. A stacked membrane assembly according to claim 5, characterized in that: It also includes a support gasket; the support gasket is annular; positioning holes and positioning pins are evenly spaced on the support gasket; the support gaskets are stacked and staggered, and the positioning pins of the lower layer are inserted into the positioning holes of the upper layer; the film bag is arranged between the two layers of support gaskets; The middle opening of the membrane bag is aligned with the inner circle of the supporting gasket; a third sealing groove is provided on the inner wall of the supporting gasket; a third sealing ring is provided in the third sealing groove; the third sealing ring abuts against the central tube; it has a plurality of through holes; the through holes are arranged in layers along the central tube; each layer of through holes includes at least one through hole; each layer of through holes is located between two layers of supporting gaskets; and the third sealing ring is located between the two layers of through holes.

7. A stacked membrane assembly according to claim 6, characterized in that: The membrane leaf comprises a reinforcing layer and a separating layer; the reinforcing layer is made of a material selected from PSF, PEI and PAN; the separating layer covers the reinforcing layer; and the separating layer is made of PDMS or POMS material.

8. An oil and gas recovery and processing system, characterized by: It comprises an exhaust pump, a membrane assembly and a vacuum pump; the oil and gas recovery and processing system is used for an oil storage tank; the membrane assembly is a stacked membrane assembly as described in any one of claims 1 to 6; one end of the exhaust pump is connected to the oil storage tank, and the other end is connected to the air inlet of the stacked membrane assembly; one end of the vacuum pump is connected to the air return port of the stacked membrane assembly, and the other end is connected to the oil storage tank; a vent valve is provided on the exhaust port of the stacked membrane assembly.

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