Membrane separation oil gas recovery device combined with water spray washing and recovery method thereof

Abstract

The invention relates to the related technical field of oil-gas separation, in particular to a membrane separation oil-gas recovery device combined with water spray washing and a recovery method thereof, a gas inlet structure and a water inlet structure, the gas inlet structure is used for pumping oil-containing waste gas into a barrel, and the water inlet structure can form a water curtain in the barrel and wrap oil liquid; forming a water-oil mixture; a plurality of cylinders are arranged in the cylinder body, a macromolecular permeable membrane is arranged on a mounting seat at the bottom of each cylinder, a water-oil mixture entering the cylinders can be pressed by a pressing mechanism arranged in the cylinder body, so that purified water is discharged through the macromolecular permeable membranes, and after the purified water is completely discharged, the pressing mechanism executes lifting and returning actions; in the pressing process of the downward pressing mechanism, when the counter-acting force borne by the downward pressing mechanism is increased to a specific degree, the downward pressing mechanism can automatically execute lifting and returning actions, and a series of problems caused by over-pressure or under-pressure are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field related to oil and gas separation, and in particular to a membrane separation oil and gas recovery device combined with water spraying and a recovery method thereof. Background Art

[0002] The main purpose of oil and gas recovery is to reduce environmental pollution, save energy, improve resource utilization and ensure safety. Existing oil and gas recovery devices usually use the principle that oil molecules are larger than gas molecules and use polymer permeable membranes to directly intercept the oil in oil-containing waste gas. Although this method can directly separate the oil and waste gas, in actual use, after the device has been running for a period of time, a lot of oil will accumulate on the polymer permeable membrane, thus affecting the performance of the polymer permeable membrane. The staff needs to clean or replace the polymer permeable membrane regularly, which is inconvenient overall.

[0003] In this regard, some oil and gas recovery devices will use a water curtain to entrain the oil in the exhaust gas, so that the oil and clean water form a water-oil mixture. Then, the density of clean water is greater than that of oil, so that the oil-water mixture is stratified in a container with a polymer permeable membrane at the bottom, and then the lower layer of clean water is forced to be discharged by downward pressure, thereby completing the separation. Although the above method can avoid the oil accumulation problem caused by directly using a polymer permeable membrane to separate oil and gas, since the distribution of oil in the exhaust gas cannot be guaranteed to be uniform, the oil content of the water-oil mixture that falls into the filter container each time is relatively close, but there is still a gap. Therefore, after the oil-water mixture is layered, if the subsequent downward pressure stroke remains unchanged, it is easy to cause structural damage or even rupture of the polymer permeable membrane due to overpressure, or the clean water is not discharged due to underpressure. For this reason, a corresponding detection mechanism needs to be added to the device to detect the specific situation of the clean water layer before each downward pressure to discharge the clean water, and determine the subsequent downward pressure based on the detection results. However, these require program control and sensor elements, which on the one hand increases the investment cost, and on the other hand, before each discharge of clean water, detection and subsequent program regulation are required, which takes a certain amount of time, resulting in low processing efficiency. Summary of the invention

[0004] The object of the present invention is to provide a membrane separation oil and gas recovery device combined with water spraying and a recovery method thereof, so as 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 membrane separation oil and gas recovery device combined with water spraying, comprising a frame and a cylinder mounted on the frame, and further comprising: An air intake structure and a water intake structure, wherein the air intake structure is used to pump the oil-containing waste gas into the cylinder, and the water intake structure can form a water curtain in the cylinder and entrain the oil to form a water-oil mixture; A cylinder is provided inside the cylinder body, and a polymer permeable membrane is provided on the mounting seat at the bottom of the cylinder. The water-oil mixture entering the cylinder can be pressurized by a downward pressing mechanism arranged in the cylinder body so that the clean water can be discharged through the polymer permeable membrane, and when the clean water is discharged, the downward pressing mechanism performs an upward lifting and retreating action.

[0006] As a further solution of the present invention: the pressing mechanism comprises an assembly plate movably arranged in the cylinder, a lifting plate slidably arranged on the assembly plate, and a pressure plate connected to the assembly plate through two sets of elastic change components; The assembly plate can be raised and lowered in the cylinder, and the lifting plate can be driven by two sets of pull-back components arranged on the assembly plate to drive the pressure plate to lift up.

[0007] As a further solution of the present invention: the elastic change component includes an assembly cylinder arranged on the side of the lifting plate and a vertical rod that is slidably sleeved with the assembly cylinder and connected to the pressure plate, and an annular protrusion that is slidably connected to the inner wall of the assembly cylinder is also fixed on the vertical rod; A third spring sleeved on the outer circumference of the vertical rod is arranged in the assembly tube, and two ends of the third spring are respectively connected to the inner wall of the assembly tube and the annular protrusion, and the vertical rod and the pullback assembly are matched through a one-way limiting structure.

[0008] As a further solution of the present invention: a guide groove is provided on the assembly plate, the pullback assembly includes a slider slidably engaged in the guide groove, the slider is connected to an energy storage component arranged in the guide groove, and a connecting rod is provided between the slider and the lifting plate, and both ends of the connecting rod are respectively hinged to the slider and the lifting plate.

[0009] As a further solution of the present invention: the energy storage component includes a guide shaft arranged in the guide groove and a first spring sleeved on the outer circumference of the guide shaft, the guide shaft passes through the slider and is slidably connected thereto, one end of the first spring is connected to the slider, and the other end is connected to a frustum fixedly arranged at one end of the guide shaft toward the midpoint of the assembly plate.

[0010] As a further solution of the present invention: the one-way limiting structure includes a first triangular block movably arranged on one side of the slider through an elastic telescopic member and a second triangular block connected to the vertical rod. When the first triangular block and the second triangular block are in contact with each other, the first spring can be kept in a compressed state. The other side of the slider is also provided with a rolling mating member that can cause the first spring to return to a compressed state and the first triangular block and the second triangular block to return to a contact state.

[0011] As a further solution of the present invention: the elastic telescopic member includes a fixed sleeve arranged on the side of the slider, a telescopic column slidably fitted with the fixed sleeve and connected to the first triangular block, and a second spring arranged inside the fixed sleeve, wherein the two ends of the second spring are respectively connected to the inner wall of the fixed sleeve and an end of the telescopic column away from the first triangular block.

[0012] As a further solution of the present invention: the rolling mating part includes a pulley rotatably installed on the side of the slider and a limiting plate arranged in the cylinder, and an inclined portion is formed at both ends of the limiting plate. In the latter part of the rising stroke of the assembly plate, the pulley abuts against the inclined portion and can prompt the slider to give way.

[0013] As a further solution of the present invention: the water inlet structure includes a plurality of water inlets provided at the top of the cylinder and a liquid outlet connected to the water inlets, and the air inlet structure includes an air inlet provided on the cylinder and an air guide connected to the air inlet; The liquid outlet part and the air guide part are both arranged in an arc shape and are hollow inside. A gap is provided at the bottom of the liquid outlet part, and a plurality of air outlets are provided on the inner wall of the air guide part. A receiving seat is also fixed in the cylinder body, and a plurality of recessed parts are provided on the receiving seat. The cylinder is connected to the recessed parts through a conduit.

[0014] An oil and gas recovery method, using the above-mentioned membrane separation oil and gas recovery device combined with water spraying, comprises the following steps: Step 1: pump clean water into the cylinder through the water inlet to form a water curtain, and pump the oily waste gas to be treated into the cylinder through the air inlet. The clean water entrains the oil to form an oil-water mixture and enters the recessed part; Step 2: the oil-water mixture flows into the cylinder through the conduit and separates into layers; Step 3: The pressure plate enters the cylinder and applies pressure to make the lower layer of purified water pass through the polymer permeable membrane and be guided out of the cylinder. After the purified water is discharged, the pressure plate is lifted up and retreated. Step 4: The pressure plate rises and resets, and the external pump body extracts and collects the remaining oil in the cylinder.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present application utilizes mechanical interlocking to realize the automatic retraction of the pressing mechanism after the purified water is discharged, thereby ensuring that the purified water is completely discharged and avoiding the structural damage or even rupture of the polymer permeable membrane caused by overpressure; Specifically, when pressing down, the elastic deformation of the third spring is used to reflect whether the purified water has been completely discharged. When the compression amount of the third spring increases to a certain extent, the slider can be released from the restriction, and the elastic potential energy is released by the energy storage component, so that the lifting plate drives the pressure plate to lift up and retreat. Therefore, the pressing mechanism designed in the present application will automatically perform the lifting and retreating action when the reaction force received increases to a certain extent during the pressure application process, thereby avoiding a series of problems caused by overpressure or underpressure. In addition, the stroke of the assembly plate can be fixed each time it works, and there is no need to control the driving stroke of the cylinder according to the stratification of the oil-water mixture in the cylinder, which simplifies the driving method and reduces production input costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a structural schematic diagram of an embodiment of a membrane separation oil and gas recovery device combined with water spraying.

[0017] Figure 2 This is a schematic structural diagram from another angle of an embodiment of a membrane separation oil and gas recovery device combined with water spraying.

[0018] Figure 3 This is a schematic diagram of the internal structure of the cylinder in one embodiment of a membrane separation oil and gas recovery device combined with water spraying.

[0019] Figure 4 for Figure 3 Schematic diagram of the structure from another angle.

[0020] Figure 5 This is a schematic structural diagram of the air inlet structure and the water inlet structure in one embodiment of a membrane separation oil and gas recovery device combined with water spraying.

[0021] Figure 6 for Figure 5 Schematic diagram of the structure from another angle.

[0022] Figure 7 The present invention is a schematic structural diagram of a downward pressure mechanism in an embodiment of a membrane separation oil and gas recovery device combined with water spraying.

[0023] Figure 8 This is a schematic structural diagram from another angle of the downward pressure mechanism in an embodiment of a membrane separation oil and gas recovery device combined with water spraying.

[0024] Fig. 9 This is a structural explosion diagram of the downward pressure mechanism in an embodiment of a membrane separation oil and gas recovery device combined with water spraying.

[0025] Fig.10 for Fig. 9 Schematic diagram of the structure from another angle.

[0026] Fig.11 for Figure 4 A magnified view of the structure at center.

[0027] Fig.12 for Figure 7 A magnified view of the structure at point B.

[0028] Fig.13 for Fig. 9 Enlarged view of the structure at C in the middle.

[0029] In the figure: 1, frame; 2, cylinder; 3, air inlet; 4, air guide; 5, water inlet; 6, liquid outlet; 7, receiving seat; 701, recessed portion; 8, conduit; 9, cylinder; 10, mounting seat; 11, one-way valve; 12, oil outlet pipe; 13, cylinder; 14, connecting plate; 15, assembly plate; 16, slider; 1601, pulley; 17, guide shaft; 1701, round table; 18, first spring; 19, fixing sleeve; 20, telescopic column; 21, first triangular block; 22, second triangular block; 23, lifting plate; 24, second spring; 25, pressure plate; 26, assembly cylinder; 27, vertical rod; 2701, annular protrusion; 28, connecting rod; 29, third spring; 30, limit plate; 3001, inclined portion. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In addition, when an element in the present invention is referred to as being "disposed on" or "disposed on" another element, it may be directly on the other element or there may be a centered element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a centered element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0032] See also Figure 1-Figure 13 In an embodiment of the present invention, a membrane separation oil and gas recovery device combined with water spraying includes a frame 1 and a cylinder 2 installed on the frame 1, and also includes: An air intake structure and a water intake structure, wherein the air intake structure is used to pump the oily waste gas into the cylinder 2, and the water intake structure can form a water curtain in the cylinder 2 and entrain the oil to form a water-oil mixture; Cylinders 9 are provided in plurality inside the cylinder body 2, and a polymer permeable membrane is provided on a mounting seat 10 at the bottom of the cylinder 9. The water-oil mixture entering the cylinder 9 can be pressurized by a downward pressing mechanism provided in the cylinder body 2 so that clean water can be discharged through the polymer permeable membrane, and when the clean water is discharged, the downward pressing mechanism performs an upward lifting and retreating action.

[0033] Furthermore, in a specific implementation, the water inlet structure can pump clean water into the cylinder 2, and the pumped clean water forms a water curtain, and the air inlet structure pumps the oily waste gas to be treated from one side of the water curtain to the water curtain. Therefore, with the help of the flushing and entrainment of the water flow, the oil in the waste gas can be quickly separated, and the oil and clean water form a water-oil mixture and enter the cylinder 9, and the remaining gas is discharged from the outside of the cylinder 2. For this purpose, an exhaust valve is also provided on the cylinder 2 for regular exhaust. After the water-oil mixture enters the cylinder 9, since the density of the clean water is greater than that of the oil, the oil-water mixture will be layered, with the oil located in the upper layer and the clean water located in the lower layer. Under the same pressure, the clean water can pass through the polymer permeable membrane, while the oil cannot pass through the polymer permeable membrane. Therefore, under the pressure of the downward pressure mechanism, the clean water in the lower layer is discharged through the polymer permeable membrane and finally discharged from the bottom of the cylinder 2. After the clean water is drained, since the oil cannot pass through the polymer permeable membrane, the reaction force on the pressing mechanism increases, prompting the pressing mechanism to lift and retreat, thereby avoiding the problem of structural damage or even rupture of the polymer permeable membrane caused by excessive pressure; Furthermore, since the distribution of oil in the exhaust gas cannot be guaranteed to be uniform, the oil content of the water-oil mixture falling into the cylinder 9 each time is relatively close, but there is still a gap. Therefore, when pressing down to remove the clean water, the pressing amount of the water-oil mixture by the pressing mechanism needs to be strictly controlled, otherwise it is easy to cause structural damage or even rupture of the polymer permeable membrane due to overpressure, or the clean water is not completely discharged due to underpressure. In this regard, the pressing mechanism designed in the present application will automatically perform the lifting and retreating action when the reaction force increases to a certain degree during the pressure application process, thereby avoiding a series of problems caused by overpressure or underpressure; Of course, the existing device will detect the stratification of clean water and oil in advance before each pressure is pressed down to drain the clean water, and control the pressure amount according to the detection result. Although this method can also achieve accurate control of the pressure amount, the overall process is relatively complicated and needs to rely on program control. On the one hand, it increases the investment cost. On the other hand, before each clean water is drained, detection and subsequent program control are required, which takes a certain amount of time and leads to low processing efficiency. The present application utilizes mechanical interlocking to realize the automatic retraction of the pressure mechanism after the clean water is drained, which effectively improves the above problems and is suitable for popularization and use.

[0034] It should be supplemented that a one-way valve 11 is also provided on the mounting seat 10, and the one-way valve 11 is connected to an oil outlet pipe 12 extending to the outside of the cylinder 2, and the upper part of the mounting seat 10 is inclined, so that after the clean water is removed, when the oil is collected, the oil can be gathered at the one-way valve 11. It should be emphasized that during the operation of the downward pressure mechanism, the pressure applied by it cannot make the one-way valve 11 conductive (that is, the opening pressure of the one-way valve 11 is large enough). After the clean water is removed, the external pump body connected to the oil outlet pipe 12 works, the one-way valve 11 is turned on, and the oil in the cylinder 9 can be pumped away and collected.

[0035] Please refer again Figure 7-Figure 13 The pressing mechanism includes an assembly plate 15 movably arranged in the cylinder 2, a lifting plate 23 slidably arranged on the assembly plate 15, and a pressure plate 25 connected to the assembly plate 15 through two groups of elastic change components; the assembly plate 15 can be lifted and lowered in the cylinder 2, and the lifting plate 23 can be driven by two groups of pullback components arranged on the assembly plate 15 to drive the pressure plate 25 to lift up.

[0036] Specifically, a cylinder 13 is installed in the cylinder body 2, and a connecting plate 14 is fixed to the movable end of the cylinder 13, and the assembly plate 15 is fixed to the connecting plate 14. During operation, the cylinder 13 drives the assembly plate 15 to move downward through the connecting plate 14, and then the assembly plate 15 drives the pressure plate 25 to move into the cylinder 9 through the lifting plate 23 to pressurize and discharge the clean water in the cylinder 9. When the clean water is discharged, the elastic potential energy of the elastic change component will change, and the surface clean water has been discharged. Then, the pull-back component is triggered to drive the lifting plate 23 to slide upward on the assembly plate 15, and the pressure plate 25 is automatically lifted. In this regard, while being able to avoid overpressure or underpressure problems, the stroke of the assembly plate 15 can be fixed each time it works, and there is no need to control the driving stroke of the cylinder 13 according to the stratification of the oil-water mixture in the cylinder 9, thereby simplifying the driving method.

[0037] The elastic change component includes an assembly cylinder 26 provided on the side of the lifting plate 23 and a vertical rod 27 that is slidably sleeved with the assembly cylinder 26 and connected to the pressure plate 25. An annular protrusion 2701 that is slidably connected to the inner wall of the assembly cylinder 26 is also fixed on the vertical rod 27. A third spring 29 sleeved on the outer periphery of the vertical rod 27 is provided in the assembly cylinder 26. Two ends of the third spring 29 are respectively connected to the inner wall of the assembly cylinder 26 and the annular protrusion 2701. The vertical rod 27 and the pulling-back component are cooperated through a one-way limiting structure. A guide groove is provided on the assembly plate 15. The pulling-back component includes a slider 16 slidably fitted in the guide groove. The slider 16 is connected with an energy storage member provided in the guide groove. A connecting rod 28 is provided between the slider 16 and the lifting plate 23. Two ends of the connecting rod 28 are respectively hinged to the slider 16 and the lifting plate 23. The energy storage member includes a guide shaft 17 provided in the guide groove and a first spring 18 sleeved on the outer periphery of the guide shaft 17. The guide shaft 17 penetrates through the slider 16 and is slidably connected thereto. One end of the first spring 18 is connected to the slider 16, and the other end is connected to a frustum 1701 fixed at one end of the guide shaft 17 facing the midpoint of the assembly plate 15.

[0038] Specifically, after the water-oil mixture in the cylinder 9 is stratified, the assembly plate 15 moves downward. Then, the pressure plate 25 moves toward the inside of the cylinder 9. The bottom of the pressure plate 25 will contact the oil liquid located in the upper layer. Under the action of pressure, the clean water located in the lower layer is discharged through the polymer permeable membrane. After the clean water is drained, as the assembly plate 15 continues to move downward, since the oil liquid cannot pass through the polymer permeable membrane and the one-way valve 11 does not reach the opening pressure, the pressure plate 25 will remain stationary. The assembly cylinder 26 and the vertical rod 27 slide relatively, and the third spring 29 is gradually compressed. Immediately, the one-way limiting structure releases the limiting state of the slider 16. The energy storage member releases elastic potential energy, that is, the first spring 18 rebounds, causing the slider 16 to move away from the midpoint of the assembly plate 15 in the guide groove. The slider 16 then pulls the lifting plate 23 to rise on the assembly plate 15 through the connecting rod 28. The compressed state of the third spring 29 is released, and the pressure plate 25 is lifted to be separated from the oil liquid, avoiding damage or even rupture of the polymer permeable membrane structure due to overpressure caused by continuous pressure application.

[0039] The one-way limiting structure includes a first triangular block 21 movably arranged on one side of the slider 16 through an elastic telescopic member and a second triangular block 22 connected to the vertical rod 27. When the first triangular block 21 and the second triangular block 22 are in contact with each other, the first spring 18 can be kept in a compressed state. The other side of the slider 16 is also provided with a rolling mating member that can restore the first spring 18 to a compressed state and restore the first triangular block 21 and the second triangular block 22 to an abutting state. The elastic telescopic member includes a fixed sleeve 19 arranged on the side of the slider 16, a telescopic column 20 that is slidably fitted with the fixed sleeve 19 and connected to the first triangular block 21, and a second spring 24 arranged inside the fixed sleeve 19, and the two ends of the second spring 24 are respectively connected to the inner wall of the fixed sleeve 19 and an end of the telescopic column 20 away from the first triangular block 21.

[0040] In the process of pressing down to discharge the purified water, after the purified water is discharged, as the third spring 29 is compressed, the first triangular block 21 and the second triangular block 22 will gradually be misaligned. After the first triangular block 21 and the second triangular block 22 are separated, the second triangular block 22 releases the limit on the first triangular block 21. Then, the first spring 18 rebounds, so that the slider 16 pulls the lifting plate 23 to rise on the assembly plate 15 through the connecting rod 28, and the pressure plate 25 is lifted and separated from the oil, so as to avoid the polymer permeable membrane structure being damaged or even ruptured due to overpressure caused by continued pressure. It should be noted that the first triangular block 21 and the second triangular block 22 are both smoothed to reduce the sliding friction between the two, thereby avoiding the problem that the third spring 29 is difficult to deform due to excessive sliding friction when the inclined surfaces of the two abut against each other.

[0041] The rolling fitting includes a pulley 1601 rotatably mounted on the side of the slider 16 and a limiting plate 30 arranged in the cylinder 2, and an inclined portion 3001 is formed at each end of the limiting plate 30. In the latter part of the rising stroke of the assembly plate 15, the pulley 1601 abuts against the inclined portion 3001 and can cause the slider 16 to give way.

[0042] Specifically, after the downward movement of the assembly plate 15 is completed, the assembly plate 15 rises immediately. In the latter part of its rising stroke, the pulley 1601 will roll with the inclined portion 3001, so that the pulley 1601 drives the slider 16 to give way, and the slider 16 slides in the guide groove toward the midpoint of the assembly plate 15, and the first spring 18 is gradually compressed. Correspondingly, in the latter part of the sliding stroke of the slider 16, the inclined surface of the first triangular block 21 will act on the inclined surface of the second triangular block 22, so that the telescopic column 20 slides toward the inside of the fixed sleeve 19, and the second spring 24 is compressed. After the assembly plate 15 rises and resets, the second spring 24 rebounds, and the telescopic column 20 slides toward the outside of the fixed sleeve 19, so that the inclined surfaces of the first triangular block 21 and the second triangular block 22 can be re-contacted, the slider 16 is limited again, and the first spring 18 remains compressed.

[0043] Please refer again Figure 5 and Figure 6 The water inlet structure includes a plurality of water inlets 5 provided at the top of the cylinder 2 and a liquid outlet 6 connected to the water inlets 5, and the air inlet structure includes an air inlet 3 provided on the cylinder 2 and an air guide 4 connected to the air inlet 3; The liquid outlet part 6 and the air guide part 4 are both arranged in an arc shape and are hollow inside. A gap is provided at the bottom of the liquid outlet part 6, and a plurality of air outlets are provided on the inner wall of the air guide part 4. A receiving seat 7 is also fixed in the cylinder body 2, and a plurality of recessed parts 701 are provided on the receiving seat 7. The cylinder 9 is connected to the recessed parts 701 through a conduit 8.

[0044] During operation, clean water enters the liquid outlet part 6 through the water inlet 5, and then flows out through the gap at the bottom of the liquid outlet part 6 to form a water curtain. At the same time, the oily waste gas enters the air guide part 4 through the air inlet 3, and then is blown toward the water curtain through the air outlet on the inner wall of the air guide part 4. With the help of the scouring and entrainment of the water flow, the oil in the waste gas can be quickly separated, and the oil and clean water form a water-oil mixture, which falls into the recessed portion 701 and enters the cylinder 9 through the conduit 8 for stratification.

[0045] As another embodiment of the present invention, an oil and gas recovery method is also proposed, which uses the membrane separation oil and gas recovery device combined with water spraying, comprising the following steps: Step 1: pump clean water into the cylinder 2 through the water inlet 5 to form a water curtain, and pump the oily waste gas to be treated into the cylinder 2 through the air inlet 3. The clean water entrains the oil to form an oil-water mixture and enters the recessed portion 701; Step 2: the oil-water mixture flows into the cylinder 9 through the conduit 8 and separates into layers; Step 3: The pressure plate 25 enters the cylinder 9 and applies pressure to make the lower layer of purified water pass through the polymer permeable membrane and be led out of the cylinder 2. After the purified water is discharged, the pressure plate 25 is lifted up and retreated; Step 4: the pressure plate 25 rises and resets, and the external pump body extracts and collects the remaining oil in the cylinder 9.

[0046] 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.

[0047] 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 membrane separation oil and gas recovery device combined with water spraying, comprising a frame and a cylinder mounted on the frame; It is characterized in that Also includes: An air intake structure and a water intake structure, wherein the air intake structure is used to pump the oil-containing waste gas into the cylinder, and the water intake structure can form a water curtain in the cylinder and entrain the oil to form a water-oil mixture; A cylinder is provided inside the cylinder body, and a polymer permeable membrane is provided on the mounting seat at the bottom of the cylinder. The water-oil mixture entering the cylinder can be pressurized by a downward pressing mechanism arranged in the cylinder body so that the clean water can be discharged through the polymer permeable membrane, and when the clean water is discharged, the downward pressing mechanism performs an upward lifting and retreating action.

2. A membrane separation oil and gas recovery device combined with water spraying according to claim 1, characterized in that: The pressing mechanism comprises an assembly plate movably arranged in the cylinder, a lifting plate slidably arranged on the assembly plate, and a pressure plate connected to the assembly plate through two sets of elastic change components; The assembly plate can be raised and lowered in the cylinder, and the lifting plate can be driven by two sets of pull-back components arranged on the assembly plate to drive the pressure plate to lift up.

3. The membrane separation oil and gas recovery device combined with water spraying according to claim 2 is characterized in that: The elastic change component includes an assembly cylinder arranged on the side of the lifting plate and a vertical rod which is slidably sleeved with the assembly cylinder and connected to the pressure plate, and an annular protrusion which is slidably connected to the inner wall of the assembly cylinder is fixed on the vertical rod; A third spring sleeved on the outer circumference of the vertical rod is arranged in the assembly tube, and two ends of the third spring are respectively connected to the inner wall of the assembly tube and the annular protrusion, and the vertical rod and the pullback assembly are matched through a one-way limiting structure.

4. The membrane separation oil and gas recovery device combined with water spraying according to claim 3 is characterized in that: The assembly plate is provided with a guide groove, the pullback assembly includes a slider slidably embedded in the guide groove, the slider is connected to an energy storage component arranged in the guide groove, and a connecting rod is provided between the slider and the lifting plate, and both ends of the connecting rod are respectively hinged to the slider and the lifting plate.

5. The membrane separation oil and gas recovery device combined with water spraying according to claim 4 is characterized in that: The energy storage component includes a guide shaft arranged in the guide groove and a first spring sleeved on the outer circumference of the guide shaft, the guide shaft passes through the slider and is slidably connected thereto, one end of the first spring is connected to the slider, and the other end is connected to a truncated table fixedly arranged at one end of the guide shaft toward the midpoint of the assembly plate.

6. The membrane separation oil and gas recovery device combined with water spraying according to claim 4 is characterized in that: The one-way limiting structure includes a first triangular block movably arranged on one side of the slider through an elastic telescopic member and a second triangular block connected to the vertical rod. When the first triangular block and the second triangular block are in contact with each other, the first spring can be kept in a compressed state. The other side of the slider is also provided with a rolling mating member that can cause the first spring to return to a compressed state and the first triangular block and the second triangular block to return to a contact state.

7. The membrane separation oil and gas recovery device combined with water spraying according to claim 6, characterized in that: The elastic telescopic member includes a fixed sleeve arranged on the side of the slider, a telescopic column slidably fitted with the fixed sleeve and connected to the first triangular block, and a second spring arranged inside the fixed sleeve, wherein two ends of the second spring are respectively connected to the inner wall of the fixed sleeve and an end of the telescopic column away from the first triangular block.

8. The membrane separation oil and gas recovery device combined with water spraying according to claim 6, characterized in that: The rolling fitting comprises a pulley rotatably mounted on the side of the slider and a limiting plate arranged in the cylinder, and an inclined portion is formed at each end of the limiting plate. In the latter part of the rising stroke of the assembly plate, the pulley abuts against the inclined portion and can cause the slider to give way.

9. The membrane separation oil and gas recovery device combined with water spraying according to claim 1, characterized in that: The water inlet structure includes a plurality of water inlets provided at the top of the cylinder and a liquid outlet connected to the water inlets, and the air inlet structure includes an air inlet provided on the cylinder and an air guide connected to the air inlet; The liquid outlet part and the air guide part are both arranged in an arc shape and are hollow inside. A gap is provided at the bottom of the liquid outlet part, and a plurality of air outlets are provided on the inner wall of the air guide part. A receiving seat is also fixed in the cylinder body, and a plurality of recessed parts are provided on the receiving seat. The cylinder is connected to the recessed parts through a conduit.

10. An oil and gas recovery method, using the membrane separation oil and gas recovery device combined with water spraying as claimed in claim 1, characterized in that: The following steps are involved: Step 1: pump clean water into the cylinder through the water inlet to form a water curtain, and pump the oily waste gas to be treated into the cylinder through the air inlet. The clean water entrains the oil to form an oil-water mixture and enters the recessed part; Step 2: the oil-water mixture flows into the cylinder through the conduit and separates into layers; Step 3: The pressure plate enters the cylinder and applies pressure to make the lower layer of purified water pass through the polymer permeable membrane and be guided out of the cylinder. After the purified water is discharged, the pressure plate is lifted up and retreated. Step 4: The pressure plate rises and resets, and the external pump body extracts and collects the remaining oil in the cylinder.

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