Oil-gas high-pressure membrane separation equipment with controllable pressure difference and separation method of oil-gas high-pressure membrane separation equipment

Abstract

The invention relates to the related technical field of oil-gas separation, in particular to pressure-difference-controllable oil-gas high-pressure membrane separation equipment and a separation method thereof.The pressure-difference-controllable oil-gas high-pressure membrane separation equipment comprises a base and a separation tank installed on the base and further comprises a supporting frame arranged on the base; a pumping mechanism and a pressure tank which are communicated with the inner side of the separation tank are respectively arranged on the supporting frame; a pressure moving assembly is arranged in the pressure tank and abuts against an elastic triggering piece arranged on the supporting frame, the pressure moving assembly acts on the pressure moving assembly through pressure change in the separation tank, the pressure moving assembly can extrude the elastic triggering piece to deform, and when the pressure intensity in the separation tank reaches a threshold value, the elastic triggering piece is separated from the pressure tank. The elastic triggering piece can quickly act on the pumping mechanism to change the pumping speed of the pumping mechanism, and the oil-gas separation process can be optimized while it is ensured that the pressure intensity in the separation tank is accurate and controllable, so that the oil-gas separation efficiency and purity are improved.

Description

Technical Field

[0001] The present invention relates to the technical field related to oil and gas separation, and in particular to an oil and gas high-pressure membrane separation device with controllable pressure difference and a separation method thereof. Background Art

[0002] Membrane separation of oil and gas mixture is a technology that uses polymer membrane materials to selectively permeate oil, gas and air. The basic principle is based on the different diffusion capabilities of oil and gas molecules and air molecules in the membrane, that is, the different permeation rates, so as to achieve separation. Specifically, the oil and gas mixture passes through the membrane under a certain pressure difference. The oil and gas molecules can pass through the membrane due to their smaller molecular diameter, while the air molecules are blocked outside the membrane due to their larger molecular diameter, thus achieving the separation of oil and gas from air.

[0003] Existing oil and gas high-pressure membrane separation equipment is generally equipped with a pressure valve that can adjust and control the pressure conditions in the separation tank. Once the membrane tube in the separation tank is blocked or the separation efficiency is reduced, resulting in an increase in the pressure difference in the separation tank, it is necessary to manually change the delivery rate of the oil and gas mixture to the separation tank, which makes the manual operation cumbersome, reduces the separation efficiency in the separation tank, and the pressure in the separation tank cannot be accurately controlled. Summary of the invention

[0004] The object of the present invention is to provide an oil-gas high-pressure membrane separation device with controllable pressure difference to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A pressure-differential controllable oil-gas high-pressure membrane separation device, comprising a base and a separation tank mounted on the base, and also comprising a support frame arranged on the base; The support frame is respectively provided with a pumping mechanism and a pressure tank which are connected to the inner side of the separation tank; A pressing assembly is arranged in the pressure tank, and the pressing assembly abuts against an elastic trigger member arranged on the support frame. When the pressure in the separation tank exceeds a threshold value, the pressing assembly squeezes the elastic trigger member, and the elastic trigger member can act on the pumping mechanism to change the pumping rate of the pumping mechanism.

[0006] The pressure difference controllable oil and gas high-pressure membrane separation equipment as described above: the pumping mechanism includes an impeller assembly, one end of the impeller assembly is fixed to the first motor installed on the support frame, and the air outlet on the impeller assembly is connected to the inner side of the separation tank through a delivery pipe.

[0007] The oil-gas high-pressure membrane separation device with controllable pressure difference as described above: the pressing assembly comprises an extrusion plate and an abutment plate, the extrusion plate and the abutment plate are arranged along the axial direction of the pressure tank and are slidably connected with the inner wall of the pressure tank, a movable shaft is arranged along the axial direction of the extrusion plate, the movable shaft penetrates the abutment plate and is provided with a first push rod and a second push rod on one end thereof extending out of the pressure tank; The utility model further comprises a second spring, one end of which abuts against the pressing plate, and the other end of which abuts against the abutting plate.

[0008] The oil-gas high-pressure membrane separation device with controllable pressure difference as described above: the elastic triggering member comprises a fixed plate fixedly connected to the supporting frame, a rotating plate capable of abutting against the first push rod or the second push rod is rotatably mounted on the end of the fixed plate, and limit blocks for limiting the position of the rotating plate are symmetrically arranged at both ends of the fixed plate; It also includes a first spring, one end of which is hinged to the fixed plate, and the other end of which is hinged to the rotating plate.

[0009] The oil-gas high-pressure membrane separation device with controllable pressure difference as described above: a baffle is arranged in the separation tank, a plurality of membrane tubes are connected along the circumference of the baffle, and a cleaning component for scraping the membrane tubes is arranged in the separation tank.

[0010] The oil-gas high-pressure membrane separation device with controllable pressure difference as described above: the cleaning component includes a connecting shaft rotatably arranged in the separation tank, a scraper capable of scraping the membrane tube is slidably arranged along the axial direction of the connecting shaft, and the membrane tube abuts against the cleaning plate rotatably arranged in the separation tank when the membrane tube moves to the end of the stroke The rotation of the connecting shaft and the cleaning plate rotating shaft is respectively controlled by an intermittent driving member arranged on the base.

[0011] The oil-gas high-pressure membrane separation device with controllable pressure difference as described above: a slide groove is formed on the connecting shaft, and a first ball slidably connected to the slide groove is arranged on the inner ring of the scraper.

[0012] The pressure difference controllable oil and gas high-pressure membrane separation equipment as described above: the intermittent driving component includes a second screw rod rotatably mounted on the base, the second screw rod is driven to rotate by a second motor mounted on the base, a connecting hoop is threadedly connected to the second screw rod, and the two ends of the connecting hoop are respectively slidably connected to the first transmission shaft and the second transmission shaft rotatably arranged on the base, the first transmission shaft is connected to the cleaning plate rotating shaft through a first belt, and the second transmission shaft is connected to the connecting shaft through a second belt.

[0013] The oil and gas high-pressure membrane separation equipment with controllable pressure difference as described above: a second ball and a third ball are respectively provided for rolling at both ends of the connecting hoop, a first limiting groove matched with the second ball is formed on the first transmission shaft, and a second limiting groove matched with the third ball is formed on the second transmission shaft.

[0014] A method for separating oil and gas by a high-pressure membrane with controllable pressure difference, using any of the above-mentioned high-pressure membrane separation equipment with controllable pressure difference, comprising the following steps: Step 1: Start the pumping mechanism and the intermittent drive member to work, the pumping mechanism transports the oil-gas mixture to the separation tank, and separates different components in the oil-gas mixture according to the pressure difference in the separation tank; Step 2: The pressure tank monitors the pressure in the separation tank. When the pressure in the separation tank exceeds a threshold, the pressure component squeezes the elastic trigger member so that the elastic trigger member acts on the pumping mechanism to change the pumping rate of the pumping mechanism. Step 3: When the intermittent drive part is working, it can control the scraper to scrape off the oil stains attached to the membrane tube and control the cleaning plate to clean the scraper after the scraper finishes scraping once.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The pressure change in the separation tank acts on the pressure-actuated component, so that the pressure-actuated component can squeeze the elastic trigger member to deform. When the pressure in the separation tank reaches the threshold, the elastic trigger member can quickly act on the pumping mechanism to change the pumping rate of the pumping mechanism. When the pressure in the separation tank is restored, the pumping rate of the pumping mechanism can be automatically restored. While ensuring that the pressure in the separation tank is accurately controllable, the oil-gas separation process can be optimized, thereby improving the efficiency and purity of oil-gas separation without excessive manual operation. When oil and gas separation is carried out in the separation tank, the reciprocating movement of the scraper can scrape off the oil stains attached to the membrane tube to prevent the possibility of clogging of the membrane tube, and when the scraper moves to abut against the cleaning plate, the cleaning plate can rotate relative to the scraper and clean the oil stains on the scraper, so that the scraper can effectively remove the grease on the membrane tube when working intermittently between the cleaning plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of an oil and gas high-pressure membrane separation device with controllable pressure difference.

[0017] Figure 2 This is a schematic diagram of the structure from another angle of the oil and gas high-pressure membrane separation equipment with controllable pressure difference.

[0018] Figure 3 This is a schematic diagram of the structure of the support frame and pressure tank in the oil and gas high-pressure membrane separation equipment with controllable pressure difference.

[0019] Figure 4 It is a structural schematic diagram of the pumping mechanism and elastic triggering member in the oil and gas high-pressure membrane separation equipment with controllable pressure difference.

[0020] Figure 5 This is a schematic diagram of the structure inside the pressure tank of an oil and gas high-pressure membrane separation device with controllable pressure difference.

[0021] Figure 6 This is a schematic diagram of the structure of the pressure-driven component in the oil and gas high-pressure membrane separation equipment with controllable pressure difference.

[0022] Figure 7 This is a schematic diagram of the structure of the separation tank and intermittent drive components in a pressure difference controllable oil and gas high-pressure membrane separation device.

[0023] Figure 8 This is a schematic diagram of the structure inside the separation tank in the oil and gas high-pressure membrane separation equipment with controllable pressure difference.

[0024] Fig. 9 This is a schematic diagram of the structure of the membrane tube and cleaning components in the oil and gas high-pressure membrane separation equipment with controllable pressure difference.

[0025] Fig.10 This is a schematic diagram of the structure of a scraper in an oil and gas high-pressure membrane separation device with controllable pressure difference.

[0026] Fig.11 The schematic diagram is a structural diagram of the intermittent drive components and cleaning components in the oil and gas high-pressure membrane separation equipment with controllable pressure difference.

[0027] Fig.12 The present invention is a schematic diagram of the structure of the second screw rod, the first transmission shaft and the second transmission shaft in the oil and gas high-pressure membrane separation device with controllable pressure difference.

[0028] Fig.13 This is a schematic diagram of the connecting hoop structure in the oil and gas high-pressure membrane separation equipment with controllable pressure difference.

[0029] In the figure: 1, base; 2, separation tank; 3, support frame; 4, pressure tank; 401, stop ring; 5, guide tube; 6, pumping mechanism; 601, adjustment button; 7, delivery pipe; 8, fixed plate; 801, stop block; 9, rotating plate; 10, first spring; 11, extrusion plate; 12, second spring; 13, movable shaft; 1301, first push rod; 1302, second push rod; 14, abutment plate; 15, first screw rod; 16, thread Sleeve; 17, baffle; 18, membrane tube; 19, scraper; 1901, first ball; 20, connecting shaft; 2001, slide groove; 21, cleaning plate; 22, second motor; 23, second screw rod; 24, first transmission shaft; 2401, first limiting groove; 25, second transmission shaft; 2501, second limiting groove; 26, connecting hoop; 2601, second ball; 2602, third ball; 27, first belt; 28, second belt. DETAILED DESCRIPTION

[0030] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0031] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0032] In addition, in order to better illustrate the present application, numerous specific details are provided in the specific embodiments below. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, and elements well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0033] See also Figure 1 to Figure 13 In an embodiment of the present invention, a pressure difference controllable oil and gas high-pressure membrane separation device includes a base 1 and a separation tank 2 installed on the base 1, and also includes a support frame 3 arranged on the base 1; The support frame 3 is provided with a pumping mechanism 6 and a pressure tank 4 which are connected to the inner side of the separation tank 2; A pressing component is arranged in the pressure tank 4, and the pressing component abuts against an elastic trigger member arranged on the support frame 3. When the pressure in the separation tank 2 exceeds a threshold value, the pressing component squeezes the elastic trigger member, and the elastic trigger member can act on the pumping mechanism 6 to change the pumping rate of the pumping mechanism 6.

[0034] In detail, when the pumping mechanism 6 is started, the oil-gas mixture is first transported to the separation tank 2 through the pumping mechanism 6. Once the separation efficiency in the separation tank 2 is reduced, the pressure in the separation tank 2 increases, so that the pressing component in the pressure tank 4 squeezes the elastic trigger member, and the elastic trigger member deforms and acts on the pumping mechanism 6 to change the pumping rate of the pumping mechanism 6, ensuring that the pressure in the separation tank 2 can be quickly reduced, further optimizing the separation effect in the separation tank 2, and by controlling the pressure in the separation tank 2, the oil-gas separation process can be optimized, thereby improving the efficiency and purity of the oil-gas separation.

[0035] As a further solution of the present invention, please refer to Figure 2 and Figure 3The pumping mechanism 6 includes an impeller assembly, one end of which is fixed to the first motor mounted on the support frame 3, and the air outlet on the impeller assembly is connected to the inner side of the separation tank 2 through a delivery pipe 7.

[0036] Preferably, an adjustment button 601 is provided on the first motor, which can adjust the rotation frequency of the first motor to change the pumping rate of the impeller assembly.

[0037] As a further solution of the present invention, please refer to Figure 6 The pressing assembly includes a pressing plate 11 and an abutting plate 14, which are arranged along the axial direction of the pressure tank 4 and are slidably connected to the inner wall of the pressure tank 4. A movable shaft 13 is arranged along the axial direction of the pressing plate 11, and the movable shaft 13 passes through the abutting plate 14 and is provided with a first push rod 1301 and a second push rod 1302 on one end thereof extending out of the pressure tank 4; The second spring 12 is also included. One end of the second spring 12 abuts against the pressing plate 11 , and the other end abuts against the abutting plate 14 .

[0038] Preferably, the pressure tank 4 and the separation tank 2 are internally connected via a conduit 5 .

[0039] It should be noted that: at least one group of first screw rods 15 are rotatably provided on the pressure tank 4, and a threaded sleeve 16 fixed to the abutment plate 14 is threadedly connected to the first screw rod 15. By rotating the first screw rod 15, the abutment plate 14 can be driven to make a linear motion along the axial direction of the pressure tank 4 to change the position of the abutment plate 14 in the pressure tank 4, so that the initial position of the abutment plate 14 between the extrusion plate 11 is changed, so as to change the threshold value of the monitoring pressure of the pressure tank 4 to the separation tank 2, thereby optimizing the separation effect of different components in the oil-gas mixture.

[0040] In the initial state, the second spring 12 is in a compressed state. Under the restriction of the limiting convex ring 401, the extrusion plate 11 can only move toward the end away from the limiting convex ring 401. When the separation effect in the separation tank 2 is reduced, causing the pressure in the separation tank 2 to increase, when the pressure generated on the extrusion plate 11 in the separation tank 2 is greater than the elastic force reserved by the second spring 12 itself, the extrusion plate 11 moves in a straight line along the axis of the pressure tank 4. When the extrusion plate 11 moves, it drives the movable shaft 13 to move synchronously to meet the requirement of extruding the elastic trigger member.

[0041] As a further solution of the present invention, please refer to Figure 4The elastic trigger member includes a fixed plate 8 fixedly connected to the support frame 3, and a rotating plate 9 capable of abutting against the first push rod 1301 or the second push rod 1302 is rotatably installed at the end of the fixed plate 8, and limit blocks 801 for limiting the rotating plate 9 are symmetrically arranged at both ends of the fixed plate 8; It also includes a first spring 10 , one end of which is hinged to the fixed plate 8 , and the other end of which is hinged to the rotating plate 9 .

[0042] In the initial state, the first spring 10 is in a stretched state, at which time the stretching amount of the first spring 10 is at a minimum value, and the first spring 10 exerts a force on the rotating plate 9 to drive the rotating plate 9 to rotate. Under the limiting effect of the limit block 801, the rotating plate 9 cannot rotate at this time.

[0043] When the movable shaft 13 moves, the first push rod 1301 squeezes the rotating plate 9, causing the rotating plate 9 to rotate in the opposite direction. During the rotation of the rotating plate 9, the stretching amount of the first spring 10 increases, and the elastic potential energy further increases until the rotating plate 9 rotates to the same horizontal line as the fixed plate 8. At this time, the force between the rotating plate 9 and the fixed plate 8 is in a balanced state, and the stretching amount of the first spring 10 is at a maximum value. At this time, the pressure in the separation tank 2 is close to the threshold. When the pressure in the separation tank 2 reaches the threshold, the first push rod 1301 continues to squeeze the rotating plate 9 until the rotating plate 9 and the fixed plate 8 are out of balance. Under the action of the first spring 10, the rotating plate 9 is instantly deflected to stop under the restriction of the limit block 801. In this process, the rotating plate 9 acts on the adjusting button 601, so that the rotation frequency of the first motor changes, so as to reduce the pumping rate of the impeller assembly toward the separation tank 2, and can quickly reduce the pressure in the separation tank 2 to ensure the separation effect and purity of the oil-gas mixture in the separation tank 2.

[0044] As a further solution of the present invention, please refer to Figure 8 and Fig. 9 A baffle 17 is provided in the separation tank 2 , and a plurality of membrane tubes 18 are connected to the baffle 17 along the circumference, and a cleaning component for scraping the membrane tubes 18 is provided in the separation tank 2 .

[0045] The cleaning assembly includes a connecting shaft 20 rotatably disposed in the separation tank 2, and a scraper 19 capable of scraping the membrane tube 18 is slidably disposed along the axial direction of the connecting shaft 20. When the membrane tube 18 moves to the end of the stroke, it abuts against a cleaning plate 21 rotatably disposed in the separation tank 2.

[0046] The rotation of the connecting shaft 20 and the rotating shaft of the cleaning plate 21 are respectively controlled by intermittent driving members arranged on the base 1.

[0047] A slide groove 2001 is formed on the connecting shaft 20 , and a first ball 1901 slidably connected to the slide groove 2001 is disposed on the inner ring of the scraper disc 19 .

[0048] Preferably, when the scraper 19 moves to abut against the cleaning plate 21 , the scraper 19 and the film tube 18 are not completely separated, and the ends of the scraper 19 and the film tube 18 are flush, so as to facilitate the cleaning plate 21 to rotate relative to the scraper 19 .

[0049] As a further solution of the present invention, please refer to Fig.11 The intermittent driving member includes a second screw rod 23 rotatably mounted on the base 1, the second screw rod 23 is driven to rotate by a second motor 22 mounted on the base 1, a connecting hoop 26 is threadedly connected to the second screw rod 23, and the two ends of the connecting hoop 26 are respectively slidably connected to a first transmission shaft 24 and a second transmission shaft 25 rotatably mounted on the base 1, the first transmission shaft 24 is connected to the rotating shaft of the cleaning plate 21 through a first belt 27, and the second transmission shaft 25 is connected to the connecting shaft 20 through a second belt 28.

[0050] A second ball 2601 and a third ball 2602 are respectively provided for rolling at both ends of the connecting hoop 26 , a first limiting groove 2401 adapted to the second ball 2601 is formed on the first transmission shaft 24 , and a second limiting groove 2501 adapted to the third ball 2602 is formed on the second transmission shaft 25 .

[0051] Preferably, the first limiting groove 2401 is composed of multiple sections of A linear grooves and A threaded grooves, and the second limiting groove 2501 is composed of multiple sections of B threaded grooves and B linear grooves.

[0052] When oil and gas are separated in the separation tank 2, the second motor 22 is started to work, and the output shaft of the second motor 22 is fixedly connected to the second screw rod 23, so that when the output shaft rotates, the second screw rod 23 is driven to rotate synchronously to realize the rotation requirement of the second screw rod 23. When the second screw rod 23 rotates, the connecting hoop 26 is driven to make a linear motion along the axis direction of the second screw rod 23. In the initial state, the second ball 2601 is located in the A linear groove, and the third ball 2602 is located in the B thread groove. When the connecting hoop 26 moves, the third ball 2602 squeezes the B thread groove, so that the second transmission shaft 25 rotates. Under the drive of the second belt 28, the rotation requirement of the connecting shaft 20 is realized. When the connecting shaft 20 rotates half a circle, the third ball 2602 is driven by the slide groove 2001 and the first ball With the cooperation of 1901, the scraper 19 moves from abutting against the baffle 17 to abutting against the cleaning plate 21 and then stops. During the movement of the scraper 19, the through holes thereon scrape off the oil stains attached to the membrane tube 18 to prevent the membrane tube 18 from being blocked by excessive oil stains. When the third ball 2602 moves to the B linear groove, the connecting shaft 20 rotates just half a circle. At this time, the second ball 2601 moves to the A thread groove. When the connecting hoop 26 continues to move, the second ball 2601 generates an inclined force on the A thread groove, causing the first transmission shaft 24 to rotate. Under the transmission of the first belt 27, the cleaning plate 21 can rotate relative to the scraper 19 to clean the oil stains on the scraper 19, so as to facilitate the scraper 19 to scrape the membrane tube 18 for the next time.

[0053] Among them, when the second ball 2601 is located in the A thread groove, the third ball 2602 is located in the B linear groove, the second ball 2601 is located in the A linear groove, and the third ball 2602 is located in the B thread groove, so as to realize the intermittent rotation of the first transmission shaft 24 and the second transmission shaft 25, so as to realize the scraping of the membrane tube 18 by the scraper 19 and the cleaning of the scraper 19 by the cleaning plate 21. It can complete multiple cleaning work, ensure the separation effect of the membrane tube 18, and effectively avoid the possibility of blockage of the membrane tube 18.

[0054] A method for separating oil and gas by a high-pressure membrane with controllable pressure difference, using any of the above-mentioned high-pressure membrane separation equipment with controllable pressure difference, comprising the following steps: Step 1: Start the pumping mechanism 6 and the intermittent drive member to work, the pumping mechanism 6 transports the oil-gas mixture into the separation tank 2, and separates different components in the oil-gas mixture according to the pressure difference in the separation tank 2; Step 2: The pressure tank 4 monitors the pressure in the separation tank 2. When the pressure in the separation tank 2 exceeds the threshold, the pressure component squeezes the elastic trigger member, so that the elastic trigger member acts on the pumping mechanism 6 to change the pumping rate of the pumping mechanism 6. Step 3: When the intermittent drive member is working, it can control the scraper 19 to scrape off the oil stains attached to the membrane tube 18 and control the cleaning plate 21 to clean the scraper 19 after the scraper 19 finishes scraping once.

[0055] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0056] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A pressure-differential controllable oil-gas high-pressure membrane separation device, comprising a base (1) and a separation tank (2) mounted on the base (1), and also comprising a support frame (3) arranged on the base (1), It is characterized by: The support frame (3) is provided with a pumping mechanism (6) and a pressure tank (4) respectively connected to the inner side of the separation tank (2); A pressing component is arranged in the pressure tank (4), and the pressing component abuts against an elastic triggering member arranged on the support frame (3); when the pressure in the separation tank (2) exceeds a threshold value, the pressing component presses the elastic triggering member, and the elastic triggering member can act on the pumping mechanism (6) to change the pumping rate of the pumping mechanism (6).

2. The oil-gas high-pressure membrane separation device with controllable pressure difference according to claim 1, characterized in that: The pumping mechanism (6) comprises an impeller assembly, one end of which is fixed to a first motor mounted on the support frame (3), and an air outlet on the impeller assembly is connected to the inner side of the separation tank (2) via a delivery pipe (7).

3. The oil-gas high-pressure membrane separation device with controllable pressure difference according to claim 1, characterized in that: The pressing assembly comprises an extrusion plate (11) and an abutment plate (14), the extrusion plate (11) and the abutment plate (14) being arranged along the axial direction of the pressure tank (4) and being slidably connected to the inner wall of the pressure tank (4), a movable shaft (13) being arranged along the axial direction of the extrusion plate (11), and a first push rod (1301) and a second push rod (1302) being arranged on one end of the movable shaft (13) which passes through the abutment plate (14) and extends out of the pressure tank (4); It also includes a second spring (12), one end of the second spring (12) abuts against the extrusion plate (11), and the other end of the second spring (12) abuts against the abutment plate (14).

4. The oil-gas high-pressure membrane separation device with controllable pressure difference according to claim 3, characterized in that: The elastic trigger member comprises a fixed plate (8) fixedly connected to the support frame (3); a rotating plate (9) capable of abutting against the first push rod (1301) or the second push rod (1302) is rotatably mounted at the end of the fixed plate (8); and limit blocks (801) for limiting the position of the rotating plate (9) are symmetrically arranged at both ends of the fixed plate (8); It also comprises a first spring (10), one end of the first spring (10) being hinged to the fixed plate (8), and the other end of the first spring (10) being hinged to the rotating plate (9).

5. The oil-gas high-pressure membrane separation device with controllable pressure difference according to claim 1, characterized in that: A baffle (17) is provided in the separation tank (2), a plurality of membrane tubes (18) are connected along the circumference of the baffle (17), and a cleaning component for scraping the membrane tubes (18) is provided in the separation tank (2).

6. The oil-gas high-pressure membrane separation device with controllable pressure difference according to claim 5, characterized in that: The cleaning assembly comprises a connecting shaft (20) rotatably arranged in the separation tank (2), a scraper (19) slidably arranged along the axial direction of the connecting shaft (20) and capable of scraping the membrane tube (18), and when the membrane tube (18) moves to the end of the stroke, it abuts against a cleaning plate (21) rotatably arranged in the separation tank (2). The rotation of the connecting shaft (20) and the rotating shaft of the cleaning plate (21) are respectively controlled by intermittent driving members arranged on the base (1).

7. The oil-gas high-pressure membrane separation device with controllable pressure difference according to claim 6, characterized in that: A sliding groove (2001) is formed on the connecting shaft (20), and a first ball (1901) is provided on the inner ring of the scraper plate (19) and is slidably connected to the sliding groove (2001).

8. The oil-gas high-pressure membrane separation device with controllable pressure difference according to claim 6, characterized in that: The intermittent driving member comprises a second screw rod (23) rotatably mounted on the base (1), the second screw rod (23) being driven to rotate by a second motor (22) mounted on the base (1), a connecting hoop (26) being threadedly connected to the second screw rod (23), two ends of the connecting hoop (26) being respectively slidably connected to a first transmission shaft (24) and a second transmission shaft (25) rotatably mounted on the base (1), the first transmission shaft (24) being connected to a rotating shaft of the cleaning plate (21) via a first belt (27), and the second transmission shaft (25) being connected to the connecting shaft (20) via a second belt (28).

9. The oil-gas high-pressure membrane separation device with controllable pressure difference according to claim 8, characterized in that: A second ball (2601) and a third ball (2602) are respectively provided for rolling at both ends of the connecting hoop (26); a first limiting groove (2401) adapted to the second ball (2601) is formed on the first transmission shaft (24); and a second limiting groove (2501) adapted to the third ball (2602) is formed on the second transmission shaft (25).

10. A method for oil-gas high-pressure membrane separation with controllable pressure difference, characterized in that: The oil-gas high-pressure membrane separation device with controllable pressure difference according to any one of claims 1 to 9 comprises the following steps: Step 1: starting the pumping mechanism (6) and the intermittent driving member to operate, the pumping mechanism (6) transports the oil-gas mixture into the separation tank (2), and separates different components in the oil-gas mixture according to the pressure difference in the separation tank (2); Step 2: The pressure tank (4) monitors the pressure in the separation tank (2); when the pressure in the separation tank (2) exceeds a threshold value, the pressure component squeezes the elastic trigger member, so that the elastic trigger member acts on the pumping mechanism (6) to change the pumping rate of the pumping mechanism (6); Step 3: When the intermittent drive member is working, the scraper (19) can be controlled to scrape off the oil stains attached to the membrane tube (18), and after the scraper (19) finishes scraping once, the cleaning plate (21) is controlled to clean the scraper (19).

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