A flow resistance adjustable micro / anti-gravity gas-liquid separation device and its usage method

Abstract

This invention provides a flow resistance adjustable micro / anti-gravity gas-liquid separation device and its usage method. The gas-liquid separation device includes a lower cover plate and an upper cover plate arranged opposite to and connected together. A cavity is formed between the lower and upper cover plates, and a hydrophobic separation membrane is disposed within the cavity, dividing the cavity into a separation chamber and a gas outlet chamber. The lower cover plate has a two-phase inlet and a liquid phase outlet. The two-phase inlet is connected to one end of the separation chamber, and the liquid phase outlet is connected to the other end of the separation chamber. A one-way flow resistance adjustment structure is disposed within the liquid phase outlet. The upper cover plate has a gas outlet, which is connected to the gas outlet chamber. This invention can solve the problems of separation failure under large pressure difference conditions, inability to achieve gas-liquid separation independently, and inability to adjust flow resistance in existing gas-liquid separation devices.

Description

Technical Field

[0001] This invention belongs to the field of gas-liquid separation technology in micro / anti-gravity environments, specifically relating to a flow resistance adjustable micro / anti-gravity gas-liquid separation device and its usage method. Background Technology

[0002] Microgravity fluid management technology is a key technology in aerospace engineering, widely used in various aspects of the aerospace field, including engine and pump liquid phase acquisition systems, thermal control systems, and life support systems. Gas-liquid separation technology is the core of microgravity fluid management. In a microgravity environment, the gas and liquid phases are mixed without a defined interface, which is unfavorable for single-phase acquisition applications, such as the acquisition of pure liquid phase fuel in engines or the separation of two phases in chemical reactions. Achieving stable gas-liquid separation can effectively support the rapid development of long-term, long-distance space exploration and ensure the stable and safe fluid management of spacecraft.

[0003] Existing gas-liquid separation technologies mainly include two methods: active separation and passive separation. Passive separation is widely used due to its characteristics of having no moving parts, low energy consumption, and easy maintenance. Currently, passive separation methods are mainly surface tension separation, which utilizes the hydrophilic and hydrophobic properties of materials and the capillary effect generated by the surface tension of the medium to achieve gas-liquid separation. Common methods include using micron-sized metal mesh screens or capillary wicks to obtain pure liquid phases.

[0004] An investigation revealed that existing patent literature utilizes the hydrophilic and hydrophobic properties of membranes to achieve gas-liquid separation. Chinese patent CN113493001B proposes a metal mesh curtain-type microgravity gas-liquid separation device, utilizing the "gas-blocking and liquid-permeable" properties of the metal mesh curtain to achieve gas-liquid separation. However, this separator is limited by using only a simple metal mesh curtain, resulting in low burst pressure; once the pressure difference across the metal mesh curtain reaches the kilopascal level, the separation function fails. Chinese patent CN109045762A proposes a multi-stage hydrophobic module gas-liquid separation structure, using a vacuum pump to create negative pressure on one side of the hydrophobic separation membrane, prompting the gas phase in the gas-liquid two-phase flow to permeate onto the separation membrane. However, this separator requires an additional vacuum pump to generate negative pressure and cannot achieve gas-liquid separation independently. Chinese patent CN116806278A proposes a hydrophobic gas-liquid separation device, achieving gas-liquid separation through two-phase injection on both sides, forcing the gas phase to permeate the hydrophobic membrane. However, this separator cannot adjust the flow resistance and cannot adapt to two-phase separation with a wide range of flow rates. Summary of the Invention

[0005] To address the problems of the prior art, this invention provides a flow resistance adjustable micro / counter-gravity gas-liquid separation device and its usage method, thereby solving the problems of separation failure under large pressure difference conditions, inability to achieve gas-liquid separation independently, and inability to adjust flow resistance in the prior art.

[0006] This invention is achieved through the following technical solution:

[0007] A flow resistance adjustable micro / anti-gravity gas-liquid separation device includes a lower cover plate and an upper cover plate that are arranged opposite to each other and connected together; a cavity is formed between the lower cover plate and the upper cover plate, and a hydrophobic separation membrane is disposed in the cavity, the hydrophobic separation membrane dividing the cavity into a separation chamber and a gas outlet chamber.

[0008] The lower cover plate has a two-phase inlet and a liquid phase outlet. The two-phase inlet is connected to one end of the separation chamber, and the liquid phase outlet is connected to the other end of the separation chamber. A one-way flow resistance adjustment structure is provided in the liquid phase outlet. The upper cover plate has a gas outlet, which is connected to the gas outlet chamber.

[0009] Preferably, the hydrophobic separation membrane comprises an upper layer, a middle layer, and a lower layer connected in sequence, wherein the middle layer is a metal mesh, the lower layer is a porous hydrophobic membrane, and the upper layer is a drying layer.

[0010] Furthermore, the drying layer is formed by the deposition of particulate matter with a drying effect.

[0011] Preferably, the unidirectional flow resistance adjustment structure includes a cone-shaped valve disc, a spring, and a preload adjusting nut; the preload adjusting nut is provided with an external thread, the inner surface of the liquid phase outlet is provided with an internal thread, and the preload adjusting nut is threadedly connected to the inner surface of the liquid phase outlet; the spring is sleeved on the cone-shaped valve disc and is limited by the head end of the cone-shaped valve disc and the preload adjusting nut.

[0012] Preferably, a plurality of rectifiers are arranged in the separation chamber along the two-phase flow direction, and the rectifiers are connected to the lower cover plate.

[0013] Furthermore, the distance between the top of the rectifier stage and the hydrophobic separation membrane is greater than or equal to 0.5 mm and less than or equal to 2 mm.

[0014] Preferably, a two-phase cavity is provided between the two-phase inlet and the separation chamber, and the two-phase inlet and the separation chamber are connected through the two-phase cavity; a liquid outlet cavity is provided between the liquid phase outlet and the separation chamber, and the liquid phase outlet and the separation chamber are connected through the liquid outlet cavity;

[0015] The cross-sectional area of ​​the connecting channel between the two-phase cavity and the separation cavity in the direction perpendicular to the flow direction of the two-phase flow is smaller than the cross-sectional areas of the two-phase cavity and the separation cavity in the direction perpendicular to the flow direction of the two-phase flow. The cross-sectional area of ​​the connecting channel between the liquid outlet cavity and the separation cavity in the direction perpendicular to the flow direction of the liquid phase flow is smaller than the cross-sectional areas of the liquid outlet cavity and the separation cavity in the direction perpendicular to the flow direction of the liquid phase flow.

[0016] Furthermore, an intermediate plate is provided between the lower cover plate and the upper cover plate, and the lower cover plate and the intermediate plate form a two-phase cavity and a liquid outlet cavity; the upper cover plate presses the edge of the hydrophobic separation membrane tightly against the intermediate plate.

[0017] Furthermore, sealing rings are used to seal the lower cover plate and the middle plate, as well as the middle plate and the upper cover plate.

[0018] The method of using the flow resistance adjustable micro / anti-gravity gas-liquid separator includes:

[0019] The flow resistance is adjusted by adjusting the one-way flow resistance adjustment structure. The gas-liquid two-phase flow enters from the two-phase inlet of the lower cover plate, flows through the separation chamber, and under the flow resistance provided by the one-way flow resistance adjustment structure, the pressure in the separation chamber is greater than that in the outlet chamber. Driven by the pressure difference, the gas phase in the gas-liquid two-phase flow passes through the hydrophobic separation membrane and enters the outlet chamber and flows out through the gas phase outlet. The liquid phase in the gas-liquid two-phase flow remains in the separation chamber under the action of the hydrophobic separation membrane and flows to the liquid phase outlet. After pushing aside the one-way flow resistance adjustment structure, it flows out through the liquid phase outlet.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The flow resistance adjustable micro / anti-gravity gas-liquid separation device of this invention cleverly combines the unidirectional flow characteristics of a unidirectional flow resistance adjustment structure with the liquid-blocking and gas-permeable characteristics of a hydrophobic separation membrane. Under the flow resistance provided by the unidirectional flow resistance adjustment structure, the pressure inside the separation chamber is greater than that in the outlet chamber, creating a pressure difference. The hydrophobic separation membrane provides hydrophobicity, thus enabling gas-liquid separation in a micro / anti-gravity environment under relatively large pressure difference conditions, utilizing surface tension differences and pressure difference drive to obtain pure liquid and pure gas phases. Simultaneously, the unidirectional flow resistance adjustment structure of this invention also possesses flow resistance adjustment characteristics, allowing adjustment of the separation flow resistance according to requirements. This adapts to gas-liquid separation applications with different flow resistance requirements and can also accommodate a wide range of gas-liquid two-phase flow separation requirements. It maintains a smooth flow path with no abrupt changes in flow resistance, ensuring stable gas-liquid separation performance and exhibiting excellent stability and wide applicability.

[0022] Furthermore, the hydrophobic separation membrane of the present invention uses a metal wire mesh as a skeleton, which has a stable structure and strong resistance to deformation. Even if the liquid breaks through the separation membrane, the membrane structure will not deform. It has strong pressure resistance, with liquid breakthrough pressure reaching more than 80 kPa. The upper drying layer has a gas drying function and can provide a dry pure gas phase.

[0023] Furthermore, the present invention provides a rectifier stage at the separation chamber, which makes the fluid more laminar and promotes the contact and penetration of bubbles with the hydrophobic separation membrane, which is beneficial to gas-liquid separation.

[0024] Furthermore, in this invention, the cross-sectional area of ​​the connecting channel between the two-phase cavity and the separation cavity in the direction perpendicular to the two-phase flow direction is smaller than the cross-sectional areas of the two-phase cavity and the separation cavity in the direction perpendicular to the two-phase flow direction. Similarly, the cross-sectional area of ​​the connecting channel between the liquid outlet cavity and the separation cavity in the direction perpendicular to the liquid flow direction is smaller than the cross-sectional areas of the liquid outlet cavity and the separation cavity in the direction perpendicular to the liquid flow direction. In other words, the connecting channels between the two-phase cavity and the separation cavity, as well as the connecting channel between the liquid outlet cavity and the separation cavity, are configured as microchannels. Utilizing the capillary effect generated by the surface tension of the medium, the microchannels facilitate the passage of the liquid phase, increasing the gas-liquid slip ratio within the cavity, promoting bubble coalescence, and facilitating subsequent separation. The microchannel between the liquid outlet cavity and the separation cavity provides greater pressure resistance, making the pressure in the separation cavity greater than that in the liquid outlet cavity, effectively suppressing bubble escape and ensuring gas-liquid separation efficiency.

[0025] When using the flow resistance adjustable micro / anti-gravity gas-liquid separation device of the present invention, if the flow rate of the two-phase flow changes, the flow resistance will also change, and the flow resistance will affect the gas-liquid separation effect. The present invention can adjust the flow resistance to a suitable value through a unidirectional flow resistance adjustment structure, so that the method of the present invention can be adapted to gas-liquid separation sites with different flow resistance requirements, and can also be adapted to two-phase separation with a wide range of flow rates. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the flow resistance adjustable micro / anti-gravity gas-liquid separation device of the present invention;

[0028] The attached diagram is labeled as follows: 1. Lower cover plate; 2. Two-phase inlet; 3. Two-phase chamber; 4. Separation chamber; 5. Rectifier stage; 6. Liquid outlet chamber; 7. One-way flow resistance adjustment structure; 8. Intermediate plate; 9. Hydrophobic separation membrane; 10. Drying layer; 10a. Metal wire mesh; 10b. Porous hydrophobic membrane; 10c. Gas phase outlet; 11. Upper cover plate; 12. Sealing ring; 13.

[0029] Figure 2 This is a schematic diagram of the gas-liquid separation principle of the present invention;

[0030] The attached figures are labeled as follows: drying layer 10a, metal wire mesh 10b, and porous hydrophobic membrane 10c.

[0031] Figure 3 This is the gas-liquid separation test process of the present invention. Detailed Implementation

[0032] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0033] It should be noted that the process equipment or apparatus not specifically mentioned in the following embodiments are all conventional equipment or apparatus in the art.

[0034] It should be noted that the terms "comprising" and "having," and any variations thereof, 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 necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or apparatuses. Furthermore, unless otherwise stated, the numbering of each method step is merely a convenient tool for identifying each method step, and not intended to limit the order of the method steps or define the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0035] Furthermore, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two elements.

[0036] Please see Figure 1 The flow resistance adjustable micro / anti-gravity gas-liquid separation device of the present invention includes a lower cover plate 1 and an upper cover plate 12 arranged opposite to and connected together; a cavity is formed between the lower cover plate 1 and the upper cover plate 12, and a hydrophobic separation membrane 10 is disposed in the cavity. The hydrophobic separation membrane 10 is parallel to the lower cover plate 1 and the upper cover plate 12 and divides the cavity into a separation chamber 4 and a gas outlet chamber. A two-phase inlet 2 and a liquid phase outlet 7 are provided on the lower cover plate 1. The two-phase inlet 2 is connected to one end of the separation chamber 4, and the liquid phase outlet 7 is connected to the other end of the separation chamber 4. A gas outlet 11 is provided on the upper cover plate 12, and the gas outlet 11 is connected to the gas outlet chamber. A one-way flow resistance adjustment structure 8 is provided in the liquid phase outlet 7.

[0037] During gas-liquid separation, the two-phase flow enters the separation chamber 4 from the two-phase inlet 2 and flows along the separation chamber 4 to the liquid phase outlet 7. During the flow, the gas phase in the two-phase flow enters the gas outlet chamber through the hydrophobic separation membrane 10 and flows out from the gas outlet 7, while the remaining liquid phase flows out from the liquid phase outlet 7. The unidirectional flow resistance adjustment structure 8 set at the liquid phase outlet 7 can adapt to a wide range of gas-liquid two-phase flow separation requirements. Adjusting the separation flow resistance according to the needs can maintain a smooth flow path without abrupt changes, ensuring stable gas-liquid separation effect.

[0038] In one specific embodiment of the present invention, please refer to Figure 2 The hydrophobic separation membrane 10 comprises a three-layer structure: an upper layer, a middle layer, and a lower layer. The middle layer is a metal mesh 10b, the lower layer is a porous hydrophobic membrane 10c with micron-sized pores, and the upper layer is a drying layer 10a. This invention uses the metal mesh 10b as the framework of the hydrophobic separation membrane 10, resulting in a stable structure and strong resistance to deformation. Even if liquid breaks through the hydrophobic separation membrane, the membrane structure will not deform, exhibiting strong pressure resistance, with liquid breakthrough pressure exceeding 80 kPa. The porous hydrophobic membrane 10c performs gas-liquid separation. The upper drying layer dries the separated gas phase, providing a dry, pure gas phase. The drying layer is composed of particulate matter with a drying function.

[0039] In this invention, a porous hydrophobic film 10c with a micron pore size of less than or equal to 20 μm can be deposited on one side of the metal mesh 10b by electrospinning, thermogravimetric analysis, or other methods; a dry layer 10a can be deposited on the other side of the metal mesh 10b by spraying, spin coating, or other methods.

[0040] In one specific embodiment of the present invention, the liquid phase outlet 7 is gradually expanding, and the one-way flow resistance adjustment structure 8 is fixed at the gradually expanding part of the liquid phase outlet 7. The one-way flow resistance adjustment structure 8 includes a conical valve disc 8a, a spring 8b, and a preload adjusting nut 8c; the preload adjusting nut 8c is provided with external threads, and the inner surface of the liquid phase outlet 7 is machined with internal threads. The preload adjusting nut 8c is threadedly connected to the inner surface of the liquid phase outlet 7. The spring 8b is sleeved on the conical valve disc 8a and is limited by the head end of the conical valve disc 8a and the preload adjusting nut 8c. When the liquid phase flows out, the liquid phase squeezes the conical valve disc 8a, thereby compressing the spring 8b. The conical valve disc 8a separates from the inner wall of the liquid phase outlet 7, and the liquid phase can flow out of the liquid phase outlet 7. When the liquid phase flows in the opposite direction, the conical valve disc 8a contacts the inner wall of the liquid phase outlet 7, and the liquid phase cannot flow from the outside through the liquid phase outlet 7 to the separation chamber. Therefore, the one-way flow resistance adjustment structure 8 has obvious unidirectional fluid flow characteristics. Simultaneously, by adjusting the preload adjusting nut 8c, the compression degree of the spring 8b can be changed, thereby adjusting the flow resistance. When the flow rate of the two-phase flow changes, the flow resistance also changes, and the flow resistance affects the gas-liquid separation effect. For example, within a certain range, the higher the flow resistance, the better the gas-liquid separation effect. When the flow resistance changes due to flow rate variations, this invention can adjust the flow resistance to a suitable value through the unidirectional flow resistance adjusting structure 8. Therefore, the gas-liquid separation device of this invention can adapt to gas-liquid separation applications with different flow resistance requirements, and can also adapt to two-phase separation with a wide range of flow rates.

[0041] In one specific embodiment of the present invention, a plurality of rectifier platforms 5 are arranged in the separation chamber 4 along the two-phase flow direction. The rectifier platforms 5 are connected to the lower cover plate 1, the distance between two adjacent rectifier platforms 5 is greater than or equal to 10 mm, and the distance between the top of the rectifier platform 5 and the hydrophobic separation membrane 10 is greater than or equal to 0.5 mm and less than or equal to 2 mm. The present invention arranges rectifier platforms 5 in the separation chamber 4 to make the fluid more laminar and to promote the contact and penetration of bubbles with the hydrophobic separation membrane 10, which is beneficial to gas-liquid separation.

[0042] In one specific embodiment of the present invention, a two-phase cavity 3 is provided between the two-phase inlet 2 and the separation cavity 4, and the two-phase inlet 2 and the separation cavity 4 are connected through the two-phase cavity 3; a liquid outlet cavity 6 is provided between the liquid phase outlet 7 and the separation cavity 4, and the liquid phase outlet 7 and the separation cavity 4 are connected through the liquid outlet cavity 6. The cross-sectional area of ​​the connecting channel between the two-phase cavity 3 and the separation cavity 4 in the direction perpendicular to the two-phase flow direction is smaller than the cross-sectional areas of the two-phase cavity 3 and the separation cavity 4 in the direction perpendicular to the two-phase flow direction. The cross-sectional area of ​​the connecting channel between the liquid outlet cavity 6 and the separation cavity 4 in the direction perpendicular to the liquid phase flow direction is smaller than the cross-sectional areas of the liquid outlet cavity 6 and the separation cavity 4 in the direction perpendicular to the liquid phase flow direction. That is, the connecting channels between the two-phase cavity 3 and the separation cavity 4 and the connecting channels between the liquid outlet cavity 6 and the separation cavity 4 are both microchannels. The reason for this design is that a microchannel is set at the connection of the three chambers (two-phase chamber 3, separation chamber 4, and liquid outlet chamber 6). The capillary effect generated by the surface tension of the medium makes it easier for the liquid phase to pass through the microchannel, increases the gas-liquid slip ratio in the chamber, promotes bubble merging, and facilitates subsequent separation. The pressure in separation chamber 4 is slightly higher than that in liquid outlet chamber 6, which effectively suppresses bubble escape and ensures the gas-liquid separation effect.

[0043] In one specific embodiment of the present invention, the flow resistance adjustable micro / anti-gravity gas-liquid separator further includes an intermediate plate 9 disposed between the lower cover plate 1 and the upper cover plate 12, wherein the lower cover plate 1 and the intermediate plate 9 form a two-phase cavity 3 and a liquid outlet cavity 6. The upper cover plate 12 presses the edge of the hydrophobic separation membrane 10 against the intermediate plate 9. Sealing rings 13 are used to seal the space between the lower cover plate 1 and the intermediate plate 9, as well as between the intermediate plate 9 and the upper cover plate 12.

[0044] The thickness of the intermediate plate 9 is greater than or equal to 1 mm and less than or equal to 3 mm. The connecting channel composed of the two-phase cavity 3, the separation cavity 4, and the liquid outlet cavity 6 is in the shape of "Π". The cross-sectional width of the connecting channel between the two-phase cavity 3 and the separation cavity 4 and the connecting channel between the liquid outlet cavity 6 and the separation cavity 4 in the direction perpendicular to the liquid flow direction is greater than or equal to 0.2 mm and less than or equal to 1 mm.

[0045] The working principle and process of the gas-liquid separation device of the present invention are as follows:

[0046] Taking the argon / pure water two-phase flow gas-liquid separation process as an example, a porous hydrophobic membrane with a pore size of less than or equal to 20 μm is fabricated on the lower surface of a 200-mesh metal wire mesh (10b) using electrospinning. A dry layer is formed by fixing dried particles on the upper layer using a spraying method. The hydrophobic separation membrane 10 is thus produced using this method. A 0.3×8×35mm (wire diameter×length) spring is used for the unidirectional flow resistance adjustment structure; the spring specification can be changed according to specific requirements. Please refer to [link / reference]. Figure 3First, the flow resistance is adjusted to the required level using a one-way flow resistance adjustment structure. During operation, a two-phase flow of argon gas (15 sccm) + pure water (5 ml / min) enters from the two-phase inlet 2 of the lower cover plate 1 and flows through the two-phase cavity 3. At this time, due to the narrow channel at the connection between the two-phase cavity 3 and the separation cavity 4, the liquid phase is more easily passed through under capillary action. The gas-liquid slip ratio in the two-phase cavity 3 increases, and the bubbles merge. Then, the two-phase flow enters the separation cavity 4. Under the action of the one-way flow resistance adjustment structure 8, the separation cavity 4... When the internal pressure is greater than that at the gas outlet 11, the gas phase in the gas-liquid two-phase flow passes through the hydrophobic separation membrane 10 and flows out through the gas outlet 11 under the pressure difference. The liquid phase remains in the separation chamber 4 and flows to the liquid outlet chamber 6 due to the hydrophobic properties of the hydrophobic separation membrane 19. After pushing aside the one-way flow resistance adjustment structure 8, it flows out through the liquid outlet 7. The process of the liquid phase pushing aside the one-way flow resistance adjustment structure 8 provides a continuous and stable separation driving pressure difference for the gas-liquid two-phase separation. At this time, the pressure difference across the hydrophobic separation membrane 10 is 2 kPa. Adjusting the gas-liquid two-phase flow to argon 15 sccm + pure water 15 ml / min and repeating the above separation process, the pressure difference across the hydrophobic separation membrane 10 is 3 kPa, and the gas-liquid separation effect is stable.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flow resistance controllable micro / inverse gravity gas-liquid separation device, characterized in that, The utility model provides a two-phase flow separation device, comprising a lower cover plate (1) and an upper cover plate (12) which are oppositely arranged and connected together; a cavity is formed between the lower cover plate (1) and the upper cover plate (12), a hydrophobic separation membrane (10) is arranged in the cavity, and the hydrophobic separation membrane (10) divides the cavity into a separation cavity (4) and a gas outlet cavity; Two-phase inlets (2) and a liquid-phase outlet (7) are formed in the lower cover plate (1), the two-phase inlets (2) are communicated with one end of the separation cavity (4), the liquid-phase outlet (7) is communicated with the other end of the separation cavity (4), a one-way flow resistance adjusting structure (8) is arranged in the liquid-phase outlet (7), a gas-phase outlet (11) is formed in the upper cover plate (12), and the gas-phase outlet (11) is communicated with the gas outlet cavity; The hydrophobic separation membrane (10) comprises an upper layer, an intermediate layer and a lower layer which are sequentially connected, the intermediate layer is a metal wire mesh (10b), the lower layer is a porous hydrophobic membrane (10c), and the upper layer is a drying layer (10a); The one-way flow resistance adjusting structure (8) comprises a conical rod valve (8a), a spring (8b) and a pre-tightening force adjusting nut (8c); the pre-tightening force adjusting nut (8c) is provided with external threads, the inner surface of the liquid-phase outlet (7) is provided with internal threads, and the pre-tightening force adjusting nut (8c) is threadedly connected with the inner surface of the liquid-phase outlet (7); the spring (8b) is sleeved on the conical rod valve (8a) and is limited by the head end of the conical rod valve (8a) and the pre-tightening force adjusting nut (8c); A two-phase cavity (3) is arranged between the two-phase inlets (2) and the separation cavity (4), and the two-phase inlets (2) and the separation cavity (4) are communicated through the two-phase cavity (3); a liquid outlet cavity (6) is arranged between the liquid-phase outlet (7) and the separation cavity (4), and the liquid-phase outlet (7) and the separation cavity (4) are communicated through the liquid outlet cavity (6); The cross-sectional area of the communication passage between the two-phase cavity (3) and the separation cavity (4) in the direction perpendicular to the two-phase flow direction is smaller than the cross-sectional area of the two-phase cavity (3) in the direction perpendicular to the two-phase flow direction and smaller than the cross-sectional area of the separation cavity (4) in the direction perpendicular to the two-phase flow direction, and the cross-sectional area of the communication passage between the liquid outlet cavity (6) and the separation cavity (4) in the direction perpendicular to the liquid-phase flow direction is smaller than the cross-sectional area of the liquid outlet cavity (6) in the direction perpendicular to the liquid-phase flow direction and smaller than the cross-sectional area of the separation cavity (4) in the direction perpendicular to the liquid-phase flow direction; An intermediate plate (9) is arranged between the lower cover plate (1) and the upper cover plate (12), the lower cover plate (1) and the intermediate plate (9) form the two-phase cavity (3) and the liquid outlet cavity (6), and the upper cover plate (12) presses the edge of the hydrophobic separation membrane (10) against the intermediate plate (9); The thickness of the intermediate plate (9) is greater than or equal to 1 mm and smaller than or equal to 3 mm, the communication flow channels formed by the two-phase cavity (3), the separation cavity (4) and the liquid outlet cavity (6) are in the shape of a "Π", and the cross-sectional width of the communication passage between the two-phase cavity (3) and the separation cavity (4) and the communication passage between the liquid outlet cavity (6) and the separation cavity (4) in the direction perpendicular to the liquid-phase flow direction is greater than or equal to 0.2 mm and smaller than or equal to 1 mm.

2. The flow resistance controllable micro / inverse gravity gas-liquid separation device according to claim 1, characterized in that, The dry layer (10a) is formed by depositing granular material having a drying effect.

3. The flow resistance controllable micro / inverse gravity gas-liquid separation device according to claim 1, characterized in that, A plurality of rectifying platforms (5) are arranged along the direction of the two-phase flow in the separation chamber (4) and are connected to the lower cover plate (1).

4. The flow resistance controllable micro / inverse gravity gas-liquid separation device according to claim 3, characterized in that, The distance between the top of the rectifying platform (5) and the hydrophobic separation membrane (10) is greater than or equal to 0.5 mm and less than or equal to 2 mm.

5. The flow resistance controllable micro / inverse gravity gas-liquid separation device according to claim 1, characterized in that, The lower cover plate (1) and the intermediate plate (9) and the intermediate plate (9) and the upper cover plate (12) are sealed by sealing rings (13).

6. The method of using the flow resistance controllable micro / inverse gravity gas-liquid separation device according to any one of claims 1-5, characterized in that, Comprise: The one-way flow resistance adjusting structure (8) is adjusted to adjust the flow resistance; the gas-liquid two-phase flow enters from the two-phase inlet (2) of the lower cover plate (1), flows through the separation chamber (4), and under the action of the flow resistance provided by the one-way flow resistance adjusting structure (8), the pressure in the separation chamber (4) is greater than the outlet gas chamber, and under the driving force of the pressure difference, the gas phase in the gas-liquid two-phase flow passes through the hydrophobic separation membrane (10) into the outlet gas chamber and flows out through the gas phase outlet (11), and the liquid phase in the gas-liquid two-phase flow stays in the separation chamber (4) under the action of the hydrophobic separation membrane (10) and flows to the liquid phase outlet (7), and after resisting the one-way flow resistance adjusting structure (8), it flows out through the liquid phase outlet (7).

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