Oil-gas membrane separation device with front water curtain structure and separation method of oil-gas membrane separation device

Abstract

The invention relates to an oil-gas separation technology, in particular to an oil-gas membrane separation device with a front water curtain structure and a separation method thereof.The oil-gas membrane separation device comprises a motor, the motor is installed at the bottom of a water curtain treatment cabinet, and an output shaft of the motor is connected with a transmission mechanism; the lifting and rotating mechanism is installed in the water curtain treatment cabinet in the vertical direction, the lifting and rotating mechanism is connected with the transmission mechanism, and the motor drives the lifting and rotating mechanism to act through the transmission mechanism during operation. Through the reasonably-designed structural combination and connection relation of the cleaning structures, when oil gas passes through the water curtain structure to remove large-particle oil drops and impurities, and an oil film is attached to the surface of the water curtain wall, the oil film on the water curtain wall can be removed through the cleaning structures, and it is avoided that the oil film attached to the surface of the water curtain wall is thick, so that the oil film cannot be damaged. And an oil film attached to the surface of the water curtain wall can be removed through the cleaning structure.

Description

Technical Field

[0001] The present invention relates to an oil-gas separation technology, in particular to an oil-gas membrane separation device with a preposed water curtain structure and a separation method thereof. Background Art

[0002] An oil-gas membrane separation device is a device that uses membrane technology to separate oil and gas, mainly used for the separation and treatment of oil-gas mixtures. It separates oil and gas through the selective permeability of a semi-permeable membrane and is commonly used in the oil-gas separation process in industries such as petroleum and natural gas. An oil-gas membrane separation device usually consists of multiple components, including a membrane module, membrane material, pressure control system, etc. By controlling the pressure difference, oil and gas can be effectively separated through different membrane pore sizes or material properties; in order to reduce the burden on the membrane separation unit and improve the overall separation efficiency, a water curtain structure is combined to separate oil and gas; an oil-gas membrane separation device with a preposed water curtain structure is a device that combines water curtain and membrane separation technologies, mainly used in the pretreatment stage of the oil-gas separation process. Its function is to remove large oil droplets and impurities in the oil-gas mixture through the preliminary filtration of the water curtain.

[0003] When an oil-gas membrane separation device with a preposed water curtain structure is in use, it usually intercepts and removes large oil droplets and impurities in the oil and gas by means of a water curtain wall, and improves the oil-gas separation effect by physical filtration. However, over time, the oil droplets in the oil and gas will continuously accumulate on the surface of the water curtain wall, and the oil film will gradually thicken; after the oil film thickens, the surface of the water curtain wall gradually becomes more slippery and viscous. This change causes the attachment efficiency of the oil droplets to decrease, and the ability of the water curtain wall to remove large oil droplets in the oil and gas gradually weakens, resulting in an obvious decline in the oil-gas separation effect. In addition, as the oil film thickens, the fluid resistance encountered by the oil and gas when passing through the water curtain wall will also gradually increase. The higher resistance not only affects the smoothness of the air flow, but may also cause instability in the gas flow rate, thereby affecting the operating efficiency of the entire oil-gas separation device. Especially under high-load operation conditions, the gradual accumulation of the oil film on the surface of the water curtain wall may cause the equipment to frequently malfunction or require more frequent shutdown maintenance.

[0004] Currently, in the face of this problem, the common cleaning method is to remove the oil film on the water curtain wall by manual cleaning after the equipment is shut down. The operator needs to open the separation device, expose the water curtain wall, and use manual tools or chemical cleaning agents to clean its surface. Although this method can effectively remove the oil film, the cleaning process is cumbersome and time-consuming. Especially in an industrial environment that requires large-scale production, each shutdown cleaning will cause production interruption and affect the overall oil-gas separation process. The increase in this shutdown time will not only cause a decrease in production efficiency, but also increase the maintenance cost and affect the long-term stability of the equipment. Summary of the Invention

[0005] The purpose of the present invention is to provide an oil-gas membrane separation device with a pre-set water curtain structure and its separation method to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: An oil-gas membrane separation device with a pre-set water curtain structure includes a water curtain treatment cabinet, a membrane separator communicated with the water curtain treatment cabinet, and an oil storage tank communicated with the membrane separator. A water curtain wall is arranged in the water curtain treatment cabinet. A cleaning structure for cleaning the water curtain wall is also arranged in the water curtain treatment cabinet. The cleaning structure includes: A motor, the motor is installed at the bottom of the water curtain treatment cabinet, and the output shaft of the motor is connected with a transmission mechanism; A lifting and rotating mechanism, the lifting and rotating mechanism is vertically installed in the water curtain treatment cabinet, the lifting and rotating mechanism is connected with the transmission mechanism, and when the motor operates, the transmission mechanism drives the lifting and rotating mechanism to act; It also includes a cleaning brush connected to the lifting and rotating mechanism through a tremor mechanism. The cleaning brush rotates and abuts against the surface of the water curtain wall. When the lifting and rotating mechanism acts, the cleaning brush performs rotational and reciprocating lifting motions under the transmission of the tremor mechanism.

[0007] An oil-gas membrane separation device with a pre-set water curtain structure as described above: An oil-gas inlet is arranged at one end of the water curtain treatment cabinet, a discharge port is arranged on one side of the water curtain treatment cabinet, and an oil-gas outlet communicated with the membrane separator is arranged at one end of the top of the water curtain treatment cabinet.

[0008] An oil-gas membrane separation device with a pre-set water curtain structure as described above: A fan is arranged near one end of the oil-gas inlet in the water curtain treatment cabinet. The fan is rotatably installed at the top of an installation column. The installation column is arranged in the bottom cavity of the water curtain treatment cabinet. One side of the installation column is connected with the motor. The middle shaft of the fan and the output shaft of the motor are connected through a transmission belt and a transmission wheel.

[0009] An oil-gas membrane separation device with a pre-set water curtain structure as described above: The transmission mechanism includes a first transmission shaft arranged on the output shaft of the motor, a first bevel gear arranged at one end of the first transmission shaft, and two groups of linkage parts connected to both sides of the first bevel gear; The first transmission shaft is installed at the bottom of the cavity of the water curtain treatment cabinet through a rotating seat.

[0010] The oil-gas film separation device with a front water curtain structure as described above: each set of the linkage parts includes a second bevel gear meshing with the first bevel gear, a second transmission shaft arranged on one side of the second bevel gear, a third bevel gear arranged at one end of the second transmission shaft, and a fourth bevel gear meshing with the third bevel gear; It also includes a third transmission shaft arranged on the fourth bevel gear and two first helical gears and two second helical gears symmetrically arranged at both ends of the third transmission shaft; The second transmission shaft and the third transmission shaft are installed at the bottom of the cavity of the water curtain treatment cabinet through another rotating seat.

[0011] The oil-gas film separation device with a front water curtain structure as described above: the lifting mechanism includes a third helical gear meshing with the first helical gear, a fourth helical gear meshing with the second helical gear, and a linkage shaft and a reciprocating screw respectively provided on the third helical gear and the fourth helical gear; The upper and lower ends of the linkage shaft and the reciprocating screw are installed on the upper and lower sides of the inner wall of the cavity of the water curtain treatment cabinet through two bearing seats, and a guide groove is opened on the linkage shaft.

[0012] The oil-gas film separation device with a front water curtain structure as described above: the vibration mechanism includes an L-shaped connecting block, a connecting hole provided on the L-shaped connecting block and connected to the reciprocating screw, a ramp plate rotatably connected to the L-shaped connecting block, and a transmission member provided on the L-shaped connecting block; The ramp plate is sleeved on the linkage shaft, and the inner wall of the ramp plate is provided with convex strips to match the guide groove.

[0013] The oil-gas film separation device with a front water curtain structure as described above: the transmission member includes a right-angle block with its bottom abutting against the ramp plate, a plug-in column symmetrically arranged at the bottom of the right-angle block, a spring sleeved on the plug-in column, a limit plate arranged at one end of the plug-in column, and an engaging member arranged on the right-angle block; The plug-in column is slidably inserted into the corresponding slot opened on the L-shaped connecting block, one end of the spring abuts against the side of the L-shaped connecting block away from the right-angle block, and the other end abuts against the limit plate.

[0014] The oil-gas film separation device with a front water curtain structure as described above: the meshing member includes a sleeve rotating on the right-angle block, a fifth bevel gear provided on the outer wall of the sleeve, and a sixth bevel gear meshing with the fifth bevel gear; The sixth bevel gear rotates on the right-angle block, the right-angle block is rotatably connected to one end of the cleaning brush, and the sixth bevel gear is arranged at one end of the cleaning brush; The sleeve is sleeved on the linkage shaft, and another rib is arranged on the inner wall of the sleeve in cooperation with the guide groove.

[0015] A separation method using the oil-gas film separation device with the above-mentioned front water curtain structure includes the following steps: Step 1: Connect the oil-gas inlet to the oil-gas discharge pipe. The oil-gas enters the interior of the water curtain treatment cabinet. Through the operation of the motor, the fan is driven to rotate, so that the flow rate of the oil-gas flowing through the water curtain wall is increased. Step 2: The water curtain wall filters the particulate matter in the flowing oil-gas. When the motor is operating, the cleaning brush is simultaneously driven to reciprocate up and down and rotate against the water curtain wall. Step 3: The cleaning brush brushes and cleans the oil film attached to the water curtain wall. The oil-gas filtered by the water curtain wall enters the membrane separator through the oil-gas outlet for treatment. Step 4: The oil film brushed by the cleaning brush flows out of the water curtain treatment cabinet through the discharge port along with the water flowing through the water curtain wall. The membrane separator separates the oil-gas by membrane technology. Step 5: The oil separated by the membrane separator flows into the interior of the oil storage tank for collection, waiting for the next step of treatment.

[0016] Compared with the prior art, the beneficial effects of the present invention are: Through the structural combination and connection relationship of the reasonably designed cleaning structure, when the oil-gas passes through the water curtain structure to remove large particle oil droplets and impurities, resulting in the attachment of an oil film on the surface of the water curtain wall, the cleaning structure can remove the oil film on the water curtain wall, avoiding the thick attachment of the oil film on the surface of the water curtain wall, thereby affecting the subsequent effect of the oil-gas flowing through the water curtain wall. The cleaning structure can remove the oil film attached to the surface of the water curtain wall.

[0017] Specifically, when the motor moves, it can drive the transmission mechanism to act. The transmission mechanism is linked with the lifting and rotating mechanism, and the cleaning brush is connected to the lifting and rotating mechanism through the tremor mechanism. Therefore, when the lifting and rotating mechanism acts, the cleaning brush will be in contact with the water curtain wall for rotational brushing and cleaning. The tremor mechanism can not only transmit the lifting and rotating effects of the lifting and rotating mechanism to the cleaning brush, so that the cleaning brush brushes and cleans the water curtain wall, but also realize the up-and-down reciprocating tremor effect during the up-and-down rotation of the cleaning brush. By the cleaning brush contacting the water curtain wall for tremor, the oil film attached to the water curtain wall can be effectively removed, avoiding the situation that the oil film attached to the water curtain wall cannot be completely removed due to simply reciprocating and orderly up-and-down brushing.

[0018] Through the overall design, when removing the oil film attached to the water curtain wall, there is no need to stop the machine for treatment or manual operation. The cleaning structure can clean the attached oil film during the oil-gas separation process of the water curtain structure, improving the process of oil-gas treatment, reducing the maintenance cost and the downtime caused by cleaning. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of an oil-gas film separation device with a front water curtain structure.

[0020] Figure 2 It is a schematic structural diagram of another orientation of the oil-gas film separation device with a front water curtain structure.

[0021] Figure 3 It is a schematic structural diagram of the water curtain treatment cabinet in the oil-gas film separation device with a front water curtain structure.

[0022] Figure 4 It is a schematic structural diagram of the interior of the water curtain treatment cabinet in the oil-gas film separation device with a front water curtain structure.

[0023] Figure 5 It is a schematic structural diagram of the fan in the oil-gas film separation device with a front water curtain structure.

[0024] Figure 6 It is a schematic structural diagram of a partial cleaning structure in the oil-gas film separation device with a front water curtain structure.

[0025] Figure 7 It is a schematic structural diagram of the transmission mechanism in the oil-gas film separation device with a front water curtain structure.

[0026] Figure 8 It is a schematic structural diagram of the lifting and rotating mechanism in the oil-gas film separation device with a front water curtain structure.

[0027] Figure 9 It is a schematic structural diagram of the cleaning brush in the oil-gas film separation device with a front water curtain structure.

[0028] Figure 10 It is a schematic structural diagram of the vibration mechanism in the oil-gas film separation device with a front water curtain structure.

[0029] In the figure: 1. Water curtain treatment cabinet; 2. Membrane separator; 3. Oil storage tank; 4. Oil-gas inlet; 5. Discharge port; 6. Oil-gas outlet; 7. Water curtain wall; 8. Fan; 9. Mounting column; 10. Motor; 11. Transmission belt; 12. First transmission shaft; 13. First bevel gear; 14. Second bevel gear; 15. Second transmission shaft; 16. Third bevel gear; 17. Fourth bevel gear; 18. Third transmission shaft; 19. First helical gear; 20. Second helical gear; 21. Third helical gear; 22. Linkage shaft; 23. Fourth helical gear; 24. Reciprocating lead screw; 25. L-shaped connecting block; 26. Connecting hole; 27. Ramp plate; 28. Right-angle block; 29. Plug-in column; 30. Spring; 31. Limiting disk; 32. Fifth bevel gear; 33. Sleeve; 34. Sixth bevel gear; 35. Cleaning brush. Detailed Implementation Manner

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0031] Please refer to Figures 1 to 4 , in the embodiment of the present invention, an oil-gas film separation device with a front water curtain structure includes a water curtain treatment cabinet 1, a membrane separator 2 communicated with the water curtain treatment cabinet 1, and an oil storage tank 3 communicated with the membrane separator 2. A water curtain wall 7 is arranged in the water curtain treatment cabinet 1, and a cleaning structure for cleaning the water curtain wall 7 is also arranged in the water curtain treatment cabinet 1. The cleaning structure includes: A motor 10, the motor 10 is installed at the bottom of the water curtain treatment cabinet 1, and the output shaft of the motor 10 is connected with a transmission mechanism; A lifting and rotating mechanism, the lifting and rotating mechanism is vertically installed in the water curtain treatment cabinet 1, the lifting and rotating mechanism is connected with the transmission mechanism, and when the motor 10 operates, the transmission mechanism drives the lifting and rotating mechanism to act; It further includes a cleaning brush 35 connected to the lifting and rotating mechanism through a tremor mechanism. The cleaning brush 35 rotates and abuts against the surface of the water curtain wall 7. When the lifting and rotating mechanism acts, the cleaning brush 35 performs rotational and reciprocating lifting motions under the transmission of the tremor mechanism.

[0032] In this embodiment, after the oil and gas enter the interior of the water curtain treatment cabinet 1, it will flow through the water curtain wall 7. Through the filtration of the water curtain wall 7, large oil droplets and impurities in the oil and gas can be removed. After the water curtain wall 7 has been filtered for a long time, the oil droplets in the oil and gas will continuously accumulate on the surface of the water curtain wall 7, and the oil film will gradually thicken; after the oil film thickens, the surface of the water curtain wall 7 gradually becomes more slippery and viscous. This change causes the efficiency of oil droplet adhesion to decrease, and the ability of the water curtain wall 7 to remove large oil droplets in the oil and gas gradually weakens, resulting in an obvious decline in the oil and gas separation effect. In addition, as the oil film thickens, the fluid resistance encountered by the oil and gas when passing through the water curtain wall 7 will also gradually increase. The higher resistance not only affects the smoothness of the air flow but also may cause instability in the gas flow rate, thereby affecting the operating efficiency of the entire oil and gas separation device; By operating the motor 10, the transmission mechanism can be driven to operate. The transmission mechanism is connected to the lifting and rotating mechanism, and the cleaning brush 35 is connected to the lifting and rotating mechanism through the tremor mechanism. Therefore, when the motor 10 operates, the cleaning brush 35 can be driven to move through linkage. The cleaning brush 35 abuts against the surface of the water curtain wall 7. Under the action of the tremor mechanism, it can rotate to brush the oil film attached to the surface of the water curtain wall 7, and during the process of rotating and lifting, it can perform reciprocating lifting motion. Therefore, when the cleaning brush 35 brushes the oil film on the surface of the water curtain wall 7, it does not simply brush in an orderly manner, but during the brushing process, it performs a downward tremor motion, so that the stubborn oil film attached to the surface of the water curtain wall 7 can be removed more effectively, improving the oil film removal effect, reducing the downtime required to remove the oil film due to shutdown, and reducing the maintenance cost.

[0033] Please refer to Figures 3 to 5 As a further solution of the present invention, an oil and gas inlet 4 is provided at one end of the water curtain treatment cabinet 1, a discharge port 5 is provided on one side of the water curtain treatment cabinet 1, and an oil and gas outlet 6 communicating with the membrane separator 2 is provided at one end of the top of the water curtain treatment cabinet 1.

[0034] A fan 8 is provided near one end of the oil and gas inlet 4 inside the water curtain treatment cabinet 1. The fan 8 is rotatably installed on the top of the mounting column 9. The mounting column 9 is arranged in the bottom cavity of the water curtain treatment cabinet 1. One side of the mounting column 9 is connected to the motor 10, and the central axis of the fan 8 and the output shaft of the motor 10 are connected through a transmission belt 11 and transmission wheels.

[0035] In this embodiment, the oil and gas inlet 4 is connected to an external oil and gas discharge pipe, the discharge port 5 is connected to an external water treatment device for filtering the oil film mixed in the water, and the oil and gas outlet 6 is connected to the membrane separator 2, which can supply the oil and gas filtered by the water curtain into the membrane separator 2, and separate the oil and gas filtered by the water curtain wall 7 through membrane technology; When the oil and gas enter the water curtain treatment cabinet 1, the operation of the motor 10 can drive the fan 8 to rotate on the mounting column 9. The blowing direction of the fan 8 is from the oil and gas inlet 4 to the water curtain wall 7, which can blow the oil and gas supplied into the water curtain treatment cabinet 1 through the oil and gas inlet 4 to the water curtain wall 7, accelerating the flow rate of the oil and gas through the water curtain wall 7 and improving the filtration efficiency.

[0036] Please refer to Figure 6 、 Figure 7 As a further solution of the present invention, the transmission mechanism includes a first transmission shaft 12 arranged on the output shaft of the motor 10, a first bevel gear 13 arranged at one end of the first transmission shaft 12, and two groups of linkage members connected to both sides of the first bevel gear 13; The first transmission shaft 12 is installed on the bottom of the cavity of the water curtain treatment cabinet 1 through a rotating seat.

[0037] Each set of the linkage members includes a second bevel gear 14 meshing with the first bevel gear 13, a second transmission shaft 15 disposed on one side of the second bevel gear 14, a third bevel gear 16 disposed at one end of the second transmission shaft 15, and a fourth bevel gear 17 meshing with the third bevel gear 16; It further includes a third transmission shaft 18 disposed on the fourth bevel gear 17, and two first helical gears 19 and two second helical gears 20 symmetrically disposed at both ends of the third transmission shaft 18; The second transmission shaft 15 and the third transmission shaft 18 are installed at the bottom of the cavity of the water curtain treatment cabinet 1 through another rotating seat.

[0038] In this embodiment, the first transmission shaft 12, the second transmission shaft 15, and the third transmission shaft 18 are respectively rotatably installed at the bottom of the cavity of the water curtain treatment cabinet 1 through different rotating seats, and a partition layer is provided inside the water curtain treatment cabinet 1 for the transmission mechanism. When the water curtain wall 7 is immersed and filtered, water can be prevented from entering the transmission mechanism part, improving the protection effect. When the first transmission shaft 12 is driven by the motor 10 to rotate, the two second bevel gears 14 meshing on both sides of the first bevel gear 13 can rotate synchronously, so that the two sets of linkage members can rotate and adjust synchronously to meet the linkage use effect. The second transmission shaft 15 can drive the third transmission shaft 18 to rotate through the third bevel gear 16 and the fourth bevel gear 17, so that the third transmission shaft 18 can be synchronized with the first transmission shaft 12 to meet the driving use requirements.

[0039] Please refer to Figure 1 , as a further solution of the present invention, the lifting mechanism includes a third helical gear 21 meshing with the first helical gear 19, a fourth helical gear 23 meshing with the second helical gear 20, and a linkage shaft 22 and a reciprocating lead screw 24 respectively disposed on the third helical gear 21 and the fourth helical gear 23; The upper and lower ends of the linkage shaft 22 and the reciprocating lead screw 24 are installed on the upper and lower sides of the inner wall of the cavity of the water curtain treatment cabinet 1 through two bearing seats, and a guide groove is provided on the linkage shaft 22.

[0040] In this embodiment, the third helical gear 21 and the fourth helical gear 23 are meshed with the first helical gear 19 and the second helical gear 20 on the third transmission shaft 18. When the third transmission shaft 18 rotates, the linkage shaft 22 and the reciprocating lead screw 24 can rotate synchronously. Bearing seats are arranged at both the upper and lower ends of the linkage shaft 22 and the reciprocating lead screw 24. Through the bearing seats, the rotation effect of the linkage shaft 22 and the reciprocating lead screw 24 can be improved, and the rotational friction can be reduced. Through the bearing seats, the linkage shaft 22 and the reciprocating lead screw 24 can be installed on the inner wall of the cavity of the water curtain treatment cabinet 1 to meet the usage requirements. Moreover, a mechanical seal is arranged at the interlayer part between the linkage shaft 22 and the reciprocating lead screw 24 and the transmission mechanism. When the linkage shaft 22 and the reciprocating lead screw 24 penetrate through the interlayer, the water used to wet the water curtain wall 7 on the interlayer can be prevented from entering the transmission mechanism part. The mechanical seal is an application of the prior art.

[0041] Please refer to Figure 1 , as a further solution of the present invention, the tremor mechanism includes an L-shaped connecting block 25, a connecting hole 26 opened on the L-shaped connecting block 25 and connected to the reciprocating lead screw 24, a ramp disk 27 rotatably connected to the L-shaped connecting block 25, and a transmission member arranged on the L-shaped connecting block 25; The ramp disk 27 is sleeved on the linkage shaft 22, and a convex strip is arranged on the inner wall of the ramp disk 27 in cooperation with the guiding groove.

[0042] The transmission member includes a right-angle block 28 with the bottom abutted against the ramp disk 27, insertion columns 29 symmetrically arranged at the bottom of the right-angle block 28, a spring 30 sleeved on the insertion columns 29, a limit disk 31 arranged at one end of the insertion columns 29, and an engaging member arranged on the right-angle block 28; The insertion columns 29 are slidably inserted into the corresponding slot holes opened on the L-shaped connecting block 25. One end of the spring 30 abuts against the side of the L-shaped connecting block 25 away from the right-angle block 28, and the other end abuts against the limit disk 31.

[0043] The engaging member includes a sleeve 33 rotatably arranged on the right-angle block 28, a fifth bevel gear 32 arranged on the outer wall of the sleeve 33, and a sixth bevel gear 34 meshed with the fifth bevel gear 32; The sixth bevel gear 34 is rotatably arranged on the right-angle block 28. The right-angle block 28 is rotatably connected to one end of the cleaning brush 35, and the sixth bevel gear 34 is arranged at one end of the cleaning brush 35; The sleeve 33 is sleeved on the linkage shaft 22, and another convex strip is arranged on the inner wall of the sleeve 33 in cooperation with the guiding groove.

[0044] In this embodiment, the L-shaped connecting block 25 is connected to the reciprocating lead screw 24 through the connecting hole 26, and a sliding sleeve is arranged between the L-shaped connecting block 25 and the linkage shaft 22. Therefore, when the reciprocating lead screw 24 rotates, the L-shaped connecting block 25 can be vertically lifted and adjusted. The reciprocating lead screw 24 is an application of the prior art. A detent pin matching the thread of the reciprocating lead screw 24 is arranged in the connecting hole 26 to meet the reciprocating lifting adjustment. The linkage shaft 22 and the reciprocating lead screw 24 rotate synchronously. Therefore, when the reciprocating lead screw 24 rotates, the ramp disk 27 sleeved on the linkage shaft 22 will rotate on the L-shaped connecting block 25. The slope of the ramp disk 27 is between ten degrees and fifteen degrees, and the ramp disk 27 abuts against the bottom of the right-angle block 28. The right-angle block 28 is slidably inserted on the L-shaped connecting block 25 through two insertion posts 29. When the bottom of the slope of the ramp disk 27 abuts against the bottom of the right-angle block 28, the distance between the right-angle block 28 and the L-shaped connecting block 25 is the smallest at this time. As the ramp disk 27 rotates, when the top of the slope of the ramp disk 27 abuts against the bottom of the right-angle block 28, the distance between the L-shaped connecting block 25 and the right-angle block 28 is the largest at this time. The fifth bevel gear 32 is installed on the sleeve 33, and the sleeve 33 is sleeved on the linkage shaft 22. When the linkage shaft 22 rotates, the fifth bevel gear 32 will rotate synchronously, meshing with the sixth bevel gear 34 to drive the cleaning brush 35 to abut and rub against the water curtain wall 7, meeting the use effect of cleaning the oil film attached to the water curtain wall 7. When the distance between the right-angle block 28 and the L-shaped connecting block 25 increases, the spring 30 acts between the limit disk 31 and the L-shaped connecting block 25, and is thus squeezed and contracted to maintain the resilience. When the distance between the right-angle block 28 and the L-shaped connecting block 25 decreases, the spring 30 rebounds, enabling the distance between the L-shaped connecting block 25 and the limit disk 31 to increase, meeting the reciprocating lifting use of the right-angle block 28 on the L-shaped connecting block 25; When the cleaning brush 35 rubs against the water curtain wall 7 during lifting and rotation, and in cooperation with the lifting adjustment of the right-angle block 28 on the L-shaped connecting block 25, it can make the cleaning brush 35 rub against the water curtain wall 7 with a tremor rubbing effect, thereby effectively rubbing and cleaning the stubborn oil film on the surface of the water curtain wall 7, improving the cleaning effect on the oil film, and avoiding the situation of only transporting and lifting in an orderly manner without being able to clean the stubborn oil film on the water curtain wall 7, which affects the filtering effect of the water curtain wall 7 on large particle oil droplets and impurities.

[0045] The separation method of the oil and gas film separation device using the preposed water curtain structure as described above includes the following steps: Step 1: Connect the oil and gas inlet 4 to the oil and gas discharge pipe. The oil and gas enter the interior of the water curtain treatment cabinet 1. Through the operation of the motor 10, the fan 8 is driven to rotate, increasing the flow rate of the oil and gas when it flows through the water curtain wall 7; Step 2: The water curtain wall 7 filters the particulate matter in the flowing oil and gas. When the motor 10 is operating, it simultaneously drives the cleaning brush 35 to abut against the water curtain wall 7 and reciprocate up and down and rotate; Step 3: The cleaning brush 35 brushes and cleans the oil film attached to the water curtain wall 7. The oil and gas filtered by the water curtain wall 7 enter the membrane separator 2 through the oil and gas outlet 6 for treatment; Step 4: The oil film brushed by the cleaning brush 35 is discharged out of the water curtain treatment cabinet 1 through the discharge port 5 along with the water flowing on the water curtain wall 7. The membrane separator 2 separates the oil and gas by membrane technology; Step 5: The oil separated by the membrane separator 2 flows into the interior of the oil storage tank 3 for collection, waiting for the next step of treatment.

[0046] The above embodiments are exemplary and not restrictive. Therefore, without departing from the spirit or basic characteristics of the present invention, all technical solutions that can implement the present invention in other specific forms are included in the present invention.

Claims

1. An oil-gas membrane separation device with a front water curtain structure, comprising a water curtain treatment cabinet (1), a membrane separator (2) communicated with the water curtain treatment cabinet (1), and an oil storage tank (3) communicated with the membrane separator (2). A water curtain wall (7) is arranged in the water curtain treatment cabinet (1), and a cleaning structure for cleaning the water curtain wall (7) is further arranged in the water curtain treatment cabinet (1), characterized in that, The cleaning structure includes: A motor (10) which is installed at the bottom of the water curtain treatment cabinet (1), and a transmission mechanism is connected to the output shaft of the motor (10); A lifting and rotating mechanism which is vertically installed in the water curtain treatment cabinet (1), the lifting and rotating mechanism is connected to the transmission mechanism, and when the motor (10) operates, the transmission mechanism drives the lifting and rotating mechanism to act; It further includes a cleaning brush (35) connected to the lifting and rotating mechanism through a tremor mechanism, the cleaning brush (35) rotates and abuts against the surface of the water curtain wall (7), and when the lifting and rotating mechanism acts, the cleaning brush (35) performs rotational and reciprocating lifting movements under the transmission of the tremor mechanism.

2. The oil-gas membrane separation device with a front water curtain structure according to claim 1, characterized in that, One end of the water curtain treatment cabinet (1) is provided with an oil and gas inlet (4), one side of the water curtain treatment cabinet (1) is provided with a discharge port (5), and one end of the top of the water curtain treatment cabinet (1) is provided with an oil and gas outlet (6) communicated with the membrane separator (2).

3. The oil-gas film separation device with a front water curtain structure according to claim 2, characterized in that, A fan (8) is arranged inside the water curtain treatment cabinet (1) near one end of the oil and gas inlet (4), the fan (8) is rotatably installed at the top of the mounting column (9), the mounting column (9) is arranged in the bottom cavity of the water curtain treatment cabinet (1), one side of the mounting column (9) is connected to the motor (10), and the central axis of the fan (8) and the output shaft of the motor (10) are connected through a transmission belt (11) and transmission wheels.

4. The oil-gas film separation device with a front water curtain structure according to claim 1, characterized in that, The transmission mechanism includes a first transmission shaft (12) arranged on the output shaft of the motor (10), a first bevel gear (13) arranged at one end of the first transmission shaft (12), and two groups of linkage parts connected to both sides of the first bevel gear (13); The first transmission shaft (12) is installed at the bottom of the cavity of the water curtain treatment cabinet (1) through a rotating seat.

5. The oil-gas film separation device with a front water curtain structure according to claim 4, characterized in that, Each group of the linkage parts includes a second bevel gear (14) meshing with the first bevel gear (13), a second transmission shaft (15) arranged on one side of the second bevel gear (14), a third bevel gear (16) arranged at one end of the second transmission shaft (15), and a fourth bevel gear (17) meshing with the third bevel gear (16); It further includes a third transmission shaft (18) arranged on the fourth bevel gear (17), and two first helical gears (19) and two second helical gears (20) symmetrically arranged at both ends of the third transmission shaft (18); The second transmission shaft (15) and the third transmission shaft (18) are installed at the bottom of the cavity of the water curtain treatment cabinet (1) through another rotating seat.

6. The oil-gas film separation device with a front water curtain structure according to claim 5, characterized in that, The lifting mechanism includes a third helical gear (21) meshing with the first helical gear (19), a fourth helical gear (23) meshing with the second helical gear (20), and a linkage shaft (22) and a reciprocating lead screw (24) respectively arranged on the third helical gear (21) and the fourth helical gear (23); The upper and lower ends of the linkage shaft (22) and the reciprocating screw rod (24) are mounted on the upper and lower sides of the inner wall of the cavity of the water curtain treatment cabinet (1) through two bearing seats, and a guide groove is provided on the linkage shaft (22).

7. The oil-gas film separation device with a front water curtain structure according to claim 6, characterized in that, The vibration mechanism includes an L-shaped connecting block (25), a connecting hole (26) provided on the L-shaped connecting block (25) and connected to the reciprocating screw rod (24), a ramp plate (27) rotatably connected to the L-shaped connecting block (25), and a transmission member provided on the L-shaped connecting block (25); The ramp plate (27) is sleeved on the linkage shaft (22), and the inner wall of the ramp plate (27) is provided with a convex strip that cooperates with the guide groove.

8. The oil-gas membrane separation device with a preposed water curtain structure according to claim 7, characterized in that, The transmission member includes a right-angle block (28) whose bottom abuts against the ramp plate (27), a plug-in column (29) symmetrically arranged at the bottom of the right-angle block (28), a spring (30) sleeved on the plug-in column (29), a limit plate (31) arranged at one end of the plug-in column (29), and an engaging member arranged on the right-angle block (28); The plug-in column (29) is slidably inserted into a corresponding slot on the L-shaped connecting block (25), and one end of the spring (30) abuts against a side of the L-shaped connecting block (25) away from the right-angle block (28), and the other end abuts against the limit plate (31).

9. The oil-gas membrane separation device with a preposed water curtain structure according to claim 1 or 8, characterized in that, The meshing member comprises a sleeve (33) rotating on the right-angle block (28), a fifth bevel gear (32) arranged on the outer wall of the sleeve (33), and a sixth bevel gear (34) meshing with the fifth bevel gear (32); The sixth bevel gear (34) rotates on the right-angle block (28), the right-angle block (28) is rotatably connected to one end of the cleaning brush (35), and the sixth bevel gear (34) is arranged at one end of the cleaning brush (35); The sleeve (33) is sleeved on the linkage shaft (22), and the inner wall of the sleeve (33) is provided with another convex strip in cooperation with the guide groove.

10. A separation method for an oil-gas membrane separation device using the pre-stage water curtain structure according to any one of claims 1-9, characterized in that, The following steps are involved: Step 1: Connect the oil and gas inlet (4) to the oil and gas discharge pipe, and the oil and gas enter the water curtain treatment cabinet (1). The motor (10) drives the fan (8) to rotate, thereby increasing the flow rate of the oil and gas when it flows through the water curtain wall (7); Step 2: The water curtain wall (7) filters the particulate matter in the oil and gas flowing through it. When the motor (10) is in operation, it drives the cleaning brush (35) to abut against the water curtain wall (7) and reciprocate up and down. Step 3: Use a cleaning brush (35) to clean the oil film attached to the water curtain wall (7). The oil and gas filtered by the water curtain wall (7) enter the membrane separator (2) through the oil and gas outlet (6) for treatment; Step 4: The oil film rubbed by the cleaning brush (35) is discharged to the outside of the water curtain treatment cabinet (1) through the discharge port (5) along with the water flowing through the water curtain wall (7), and the membrane separator (2) separates the oil and gas through membrane technology; Step 5: The oil separated by the membrane separator (2) flows into the oil storage tank (3) for collection and waits for the next step of processing.

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