A gas-liquid separation and purification device

Abstract

The present invention discloses a gas-liquid separation and purification device, belonging to the technical field of separation devices, which includes a crude oil collection tank, a gas collection tank, a purification pipe and an adjustment unit; by setting a spiral purification pipe and allowing the direction of the downward movement of the crude oil mixture from top to bottom, the downward-flowing crude oil can quickly occupy the space of the purification pipe close to the crude oil collection tank, so that the crude oil squeezes the gas upward and enters the gas collection tank through the gas collection pipe, which can well improve the separation rate of gas-oil separation; at the same time, the gas collection pipe is arranged on the inner circumferential wall close to the purification pipe, and such an arrangement can keep the gas purification pipe away from the crude oil, avoiding the crude oil entering the gas collection pipe and affecting the separation rate; the other end of the gas collection pipe is connected to the inner circumferential wall of the purification pipe. When the gas enters the purification pipe from this end and before entering the next gas collection pipe, it can provide a thrust to the flowing crude oil, avoiding the crude oil entering the gas collection pipe and blocking the smooth entry of the gas into the collection tank.

Description

Technical Field

[0001] The present invention belongs to the technical field of separation equipment, and particularly relates to a gas-liquid separation and purification equipment. Background Art

[0002] With the progress of technology, more and more oil fields are discovered. After oil is extracted, in order to use the natural gas and crude oil separately, gas-liquid separation equipment is needed to separate the natural gas and crude oil, and then the crude oil is filtered and purified to reduce the impurity content rate of the crude oil. When the gas-liquid separation equipment in the prior art is working, it cannot make the crude oil move quickly below the gas, and the gas needs to move up by itself to achieve the effect of gas-oil separation, so the gas-oil separation efficiency is low. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a gas-liquid separation and purification equipment to solve the technical problem that when the gas-liquid separation equipment in the prior art is working, it cannot make the crude oil move quickly below the gas, and the gas needs to move up by itself to achieve the effect of gas-oil separation, so the gas-oil separation efficiency is low.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] The present invention provides a gas-liquid separation and purification equipment, including a crude oil collection tank, a gas collection tank, and a purification pipe coaxially arranged between the two and spirally arranged; the purification pipe includes an oil input end and an oil output end communicated with the crude oil collection tank; there is a gap layer between adjacent side walls of the purification pipe along the axial direction of the crude oil collection tank; each gap layer is provided with a number of gas collection pipes located on a concentric circle; the gas collection pipes are arranged close to the inner ring wall of the purification pipe; one end of each gas collection pipe close to the crude oil collection tank is communicated with one side wall of the purification pipe in the gap layer, and the other end is connected to the inner ring wall of the purification pipe; the gas collection pipe farthest from the crude oil collection tank and located on a concentric circle is communicated with the gas collection tank; an adjustment unit for cooperating with the rotation of the purification pipe and maintaining a normal liquid delivery state is connected to the oil input end.

[0006] Further, one end of the purification pipe is rotatably connected to the crude oil collection tank through the oil output end, and the other end is rotatably connected to the gas collection tank through the gas collection pipe farthest from the crude oil collection tank and located on a concentric circle; a connecting column coaxial with the purification pipe is rotatably connected between the crude oil collection tank and the gas collection tank; the purification pipe and the circumferential side of the connecting column are connected through a reinforcing rod; the connecting column can drive the purification pipe to rotate, and the rotation direction is the same as the spiral direction when the crude oil flows.

[0007] Further, each gas collection pipe includes a straight pipe and a U-shaped pipe arranged parallel to the connecting column; one end of the straight pipe is connected to the side wall of the purification pipe near the crude oil collection tank in the gap layer; one end of the U-shaped pipe is vertically connected to the other end of the straight pipe, and the other end of the U-shaped pipe is vertically communicated with the inner ring wall of the purification pipe; a scraping unit for scraping crude oil is arranged inside the end of the U-shaped pipe communicated with the purification pipe.

[0008] Further, the scraping unit includes a cleaning ring coaxially and slidably arranged inside the U-shaped pipe; the inner ring wall of the cleaning ring has axially symmetrically arranged fixing plates; ventilation holes are formed between the fixing plates and the inner ring wall of the cleaning ring; a baffle plate coaxial with the cleaning ring and capable of blocking the ventilation holes is rotatably connected to the fixing plates; fixing blocks are arranged on the inner wall of the U-shaped pipe; a tension spring is connected between the fixing blocks and the side wall of the cleaning ring far from the purification pipe; a control valve for controlling the on-off of gas is arranged in each straight pipe.

[0009] Further, a driving ring is coaxially and rotatably connected to the side wall of the cleaning ring far from the tension spring; a plurality of scraping grooves are formed on the circumferential side of the driving ring; a scraping block is rotatably connected between the opposite side walls of the scraping grooves; a spring is connected between the scraping block and the scraping groove; when the driving ring extends out of the U-shaped pipe, the scraping block pops out under the action of the spring; when the driving ring returns to the U-shaped pipe, the driving ring rotates and returns to the scraping groove.

[0010] Further, the adjusting unit includes a fixing frame connected to the crude oil collection tank; the height of the fixing frame exceeds the oil output end; a connecting pipe is arranged at one end of the fixing frame far from the collection tank; one end of the connecting pipe is communicated with the oil output end through a foldable folding pipe; the folding pipe can extend along with the rotation of the purification pipe; the other end of the connecting pipe is bent and connected with an infusion pipe.

[0011] Further, a filter cartridge type filter for filtering impurities in crude oil is detachably arranged inside the crude oil collection tank.

[0012] The beneficial effects of the present invention are as follows:

[0013] 1. By arranging the spiral purification pipe and allowing the crude oil mixture to move from top to bottom, the downward flowing crude oil can quickly occupy the space of the purification pipe near the crude oil collection tank, so that the crude oil squeezes the gas upward and enters the gas collection tank through the gas collection pipe, which can well improve the separation rate of gas-oil separation; at the same time, the gas collection pipe is arranged close to the inner ring wall of the purification pipe, so that the gas purification pipe can be kept away from the crude oil, avoiding the crude oil entering the gas collection pipe and affecting the separation rate; the other end of the gas collection pipe is connected to the inner ring wall of the purification pipe. When the gas enters the purification pipe from this end and before entering the next gas collection pipe, it can provide a thrust to the flowing crude oil, avoiding the crude oil entering the gas collection pipe and blocking the smooth entry of the gas into the collection tank.

[0014] 2. Under normal ventilation conditions, the baffle does not block the ventilation holes. When it is necessary to scrape the crude oil adhering to a certain U-shaped tube, rotate the baffle to block the ventilation holes, and control other control valves to block the straight pipes, only making the straight pipe connected to the U-shaped tube that needs to be scraped unblocked. Since this control valve is not blocked, most of the gas will flow into this U-shaped tube to be scraped, thereby pushing the cleaning ring to move away from the U-shaped tube. The cleaning ring will push out the crude oil adhering to the inner wall of the U-shaped tube nozzle. After that, rotate the baffle to open the ventilation holes. At this time, the accumulated gas will flow out from the ventilation holes, thereby flushing off a part of the crude oil adhering to the cleaning ring. At the same time, the gas flowing in the purification pipe can blow off a part of the crude oil, and then this part of the gas enters the straight pipe. At the same time, before pushing the cleaning ring to move, the control valve in this straight pipe can be closed for a period of time and then opened, so as to improve the moving speed of the cleaning ring and the scraping speed. After that, the cleaning ring returns to the initial position under the action of the tension spring.

[0015] 3. When the cleaning ring moves, it will synchronously drive the driving ring to move, so that the driving ring and the scraping block together push the crude oil adhering to the inner wall of the U-shaped tube towards the purification pipe. When the driving ring extends out of the U-shaped tube, the scraping block expands in a trumpet shape under the action of the spring, opening the ventilation holes. The gas flowing out of the U-shaped tube and the gas before entering the straight pipe from the purification pipe can blow off a part. When the tension spring drives the cleaning ring back to the initial position, the scraping block returns to the scraping groove. Due to the setting of the spring, the spring can press tightly against the scraping block, so that the crude oil not removed on the scraping block adheres to the inner wall of the U-shaped tube, so that this part of the crude oil fills the space between the inner walls of the driving ring and the cleaning ring. When the gas pushes the cleaning ring to move, air leakage can be avoided. Controlling the rotation of the driving ring can make the crude oil in this space rotate more evenly, thereby improving the density of this space. Before pushing the driving ring to move next time, control the rotation of the driving ring to lubricate the driving ring with this part of the crude oil, making the movement of the driving ring easier and making it easier to push out the crude oil adhering to the inner wall of the U-shaped tube nozzle.

[0016] Other advantages, objectives and features of the present invention will be described in the subsequent description, and to some extent will be obvious to those skilled in the art, or those skilled in the art can obtain teachings from the practice of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the objectives, technical solutions and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0018] Figure 1 It is a three-dimensional view of the separation device of the present invention;

[0019] Figure 2This is the three-dimensional view of the gas collection pipe of the present invention;

[0020] Figure 3 This is the three-dimensional view of the cooperation between the drive ring and the U-shaped pipe of the present invention;

[0021] Figure 4 This is the three-dimensional view of the scraping block of the present invention.

[0022] The reference signs in the drawings are as follows: crude oil collection tank 1, gas collection tank 2, purification pipe 3, oil outlet end 4, gas collection pipe 5, straight pipe 51, U-shaped pipe 52, connecting column 6, cleaning ring 7, fixing plate 8, shielding plate 9, fixing block 10, tension spring 11, drive ring 12, scraping block 13, spring 14, fixing frame 15, connecting pipe 16, folding pipe 17. Detailed implementation manner

[0023] As Figures 1 to 4 shown, the present invention provides a gas-liquid separation and purification device, including a crude oil collection tank 1, a gas collection tank 2, and a purification pipe 3 coaxially arranged between the two and spirally arranged; the purification pipe 3 includes an oil inlet end and an oil outlet end 4 communicating with the crude oil collection tank 1; there is a gap layer between adjacent side walls of the purification pipe 3 along the axial direction of the crude oil collection tank 1; each gap layer is provided with a plurality of gas collection pipes 5 located on a concentric circle; the gas collection pipes 5 are arranged close to the inner ring wall of the purification pipe 3; one end of each gas collection pipe 5 close to the crude oil collection tank 1 communicates with one side wall of the purification pipe 3 in the gap layer, and the other end is connected to the inner ring wall of the purification pipe 3; the gas collection pipe 5 farthest from the crude oil collection tank 1 and located on a concentric circle communicates with the gas collection tank 2; an adjustment unit for cooperating with the rotation of the purification pipe 3 and maintaining a normal liquid delivery state is connected to the oil inlet end.

[0024] Principle and beneficial effects of the above technical solution:

[0025] The gasoline-gas mixture is input into the oil inlet end of the purification pipe 3 through the adjustment unit, and then flows along the spiral purification pipe 3 until it enters the crude oil collection tank 1 through the oil outlet end 4. Since the purification pipe 3 is arranged in a spiral shape, when the gasoline-gas mixture flows in the purification pipe 3, under the action of centrifugal force, the crude oil will generate an outward acceleration along the outer side of the spiral purification pipe 3. Therefore, more crude oil in the crude oil mixture flows along the side wall of the purification pipe 3 away from the axis towards the crude oil collection tank 1. Since the space in the purification pipe 3 is limited, when the crude oil deflects towards the side wall away from the axis, it will occupy this part of the space. So the gas can only occupy the other part of the space close to the axis. Since the density of the crude oil is greater than that of the gas, and the crude oil continuously flows towards the crude oil collection tank 1, the crude oil occupies the space at one end of the purification pipe 3 close to the crude oil collection tank 1. At the same time, the gasoline mixture is continuously input at the oil inlet end, thus pushing up the density of the gas with a lower density. Under the dual factors of space and density, the gas will pass through the purification pipe 3 layer by layer through the gas collection pipe 5 and finally enter the gas collection tank 2.

[0026] By setting the spiral purification pipe 3 and allowing the crude oil mixture to move from top to bottom, it can enable the downward-flowing crude oil to quickly occupy the space of the purification pipe 3 close to the crude oil collection tank 1, thereby squeezing the gas upward by the crude oil and entering the gas collection tank 2 through the gas collection pipe 5, which can well improve the separation rate of gasoline and gas separation. At the same time, the gas collection pipe 5 is arranged close to the inner circumferential wall of the purification pipe 3. Such an arrangement can keep the gas purification pipe 3 away from the crude oil and prevent the crude oil from entering the gas collection pipe 5 and affecting the separation rate. The other end of the gas collection pipe 5 is connected to the inner circumferential wall of the purification pipe 3. When the gas enters the purification pipe 3 from this end and before entering the next gas collection pipe 5, it can provide a thrust to the flowing crude oil to prevent the crude oil from entering the gas collection pipe 5 and blocking the smooth entry of the gas into the collection tank.

[0027] In this embodiment, as Figure 1 shown, one end of the purification pipe 3 is rotatably connected to the crude oil collection tank 1 through the oil outlet end 4, and the other end is rotatably connected to the gas collection tank 2 through the gas collection pipe 5 that is the farthest from the crude oil collection tank 1 and located on the same concentric circle. A connecting column 6 coaxial with the purification pipe 3 is rotatably connected between the crude oil collection tank 1 and the gas collection tank 2. The inner circumferential wall of the purification pipe 3 is connected to the circumferential side of the connecting column 6 through a reinforcing rod. The connecting column 6 can drive the purification pipe 3 to rotate, and the rotation direction is the same as the spiral direction when the crude oil flows.

[0028] The principle and beneficial effects of the above technical solution:

[0029] Since the purification pipe 3 is connected to the connecting column 6 through the reinforcing rod, when the connecting column 6 rotates, the purification pipe 3 can be driven to rotate through the reinforcing rod. When the purification pipe 3 rotates, the centrifugal force exerted on the crude oil flowing in the purification pipe 3 can be further enhanced. The greater the centrifugal force on the crude oil, the closer the crude oil is to the side wall of the purification pipe 3 during the flow process, slowing down the collection speed of the crude oil. At the same time, the cross-sectional area of the crude oil in the purification pipe 3 is smaller, so that the crude oil occupies less space in the purification pipe 3, and conversely increases the space for accommodating gas. The more space the gas occupies, when gradually reducing the rotation speed of the connecting column 6, the space occupied by the crude oil will increase. At this time, the gas will be squeezed and flow towards the gas collection pipe 5 at an accelerated speed, and then flow towards the gas collection box 2 at an accelerated speed, thus accelerating the collection of gas. Therefore, by controlling the rotation speed of the connecting column 6, the collection speeds of the gas and the crude oil can be adjusted.

[0030] In this embodiment, as Figure 1 , 2 shown, each gas collection pipe 5 includes a straight pipe 51 arranged parallel to the connecting column 6 and a U-shaped pipe 52; one end of the straight pipe 51 is connected to the side wall of the purification pipe 3 in the direction of the crude oil collection box 1 near the gap layer; one end of the U-shaped pipe 52 is vertically connected to the other end of the straight pipe 51, and the other end of the U-shaped pipe 52 is vertically communicated with the inner ring wall of the purification pipe 3; a scraping unit for scraping crude oil is provided inside the end of the U-shaped pipe 52 communicating with the purification pipe 3.

[0031] Principle and beneficial effects of the above technical solution:

[0032] By providing the straight pipe 51, the gas can flow quickly, and by providing the U-shaped pipe 52, more gas can be accommodated. When the rotation speed of the connecting column 6 driving the purification pipe 3 decreases from high to low, the centrifugal force on the crude oil decreases, so that the crude oil will re-contact the inner wall of the purification pipe 3 near the crude oil collection box 1, resulting in some crude oil possibly splashing into the U-shaped pipe 52, and the scraping unit can scrape the adhered crude oil.

[0033] In this embodiment, as Figure 3 shown, the scraping unit includes a cleaning ring 7 coaxially and slidably arranged inside the U-shaped pipe 52; the inner ring wall of the cleaning ring 7 has axially symmetrically arranged fixing plates 8; ventilation holes are formed between the fixing plates 8 and the inner ring wall of the cleaning ring 7; a baffle plate 9 that is coaxial with the cleaning ring 7 and can block the ventilation holes is rotatably connected to the fixing plates 8; a fixing block 10 is provided on the inner wall of the U-shaped pipe 52; a tension spring 11 is connected between the fixing block 10 and the side wall of the cleaning ring 7 away from the purification pipe 3; a control valve for controlling the on-off of the gas (not shown in the figure) is provided in each straight pipe 51.

[0034] Principle and beneficial effects of the above technical solution:

[0035] Under normal ventilation conditions, the baffle 9 does not block the ventilation holes; when it is necessary to scrape the crude oil adhering to a certain U-shaped pipe 52, rotate the baffle 9 to block the ventilation holes, and control other control valves to block the straight pipe 51, only making the straight pipe 51 connected to the U-shaped pipe 52 to be scraped not blocked. Since this control valve is not blocked, the oil and gas mixture is continuously input at the oil delivery end to provide pressure, so most of the gas will flow into this U-shaped pipe 52 to be scraped, thereby pushing the cleaning ring 7 to move away from the U-shaped pipe 52. The cleaning ring 7 pushes out the crude oil adhering to the inner wall of the mouth of the U-shaped pipe 52. After that, rotate the baffle 9 to open the ventilation holes. At this time, the accumulated gas will flow out from the ventilation holes, thereby flushing away a part of the crude oil adhering to the cleaning ring 7. At the same time, the gas flowing in the purification pipe 3 can blow off a part of the crude oil, and then this part of the gas enters the straight pipe 51; at the same time, before pushing the cleaning ring 7 to move, the control valve in this straight pipe 51 can be closed for a period of time and then opened, so as to be able to increase the moving speed of the cleaning ring 7 and improve the scraping speed; after that, the cleaning ring 7 returns to the initial position under the action of the tension spring 11.

[0036] In this embodiment, as Figure 3 , 4 shown, a driving ring 12 is coaxially rotatably connected to the side wall of the cleaning ring 7 away from the tension spring 11; a plurality of scraping grooves are formed on the circumferential side of the driving ring 12; a scraping block 13 is rotatably connected between the opposite side walls of the scraping groove; a spring 14 is connected between the scraping block 13 and the scraping groove; when the driving ring 12 extends out of the U-shaped pipe 52, the scraping block 13 pops out under the action of the spring 14; when the driving ring 12 returns to the U-shaped pipe 52, the driving ring 12 rotates and returns to the scraping groove.

[0037] The principle and beneficial effects of the above technical solution:

[0038] When the cleaning ring 7 moves, it will synchronously drive the driving ring 12 to move, so that the driving ring 12 and the scraping block 13 together push the crude oil adhering to the inner wall of the U-shaped pipe 52 towards the purification pipe 3. When the driving ring 12 extends out of the U-shaped pipe 52, the scraping block 13 expands in a trumpet shape under the action of the spring 14, opening the ventilation hole, and part of the gas flowing out of the U-shaped pipe 52 and the gas before entering the straight pipe 51 from the purification pipe 3 can be blown off. When the tension spring 11 drives the cleaning ring 7 back to the initial position, the scraping block 13 returns to the scraping groove. Due to the provision of the spring 14, the spring 14 can tightly press against the scraping block 13, so that the crude oil not removed on the scraping block 13 adheres to the inner wall of the U-shaped pipe 52, so that this part of the crude oil fills the space between the inner walls of the driving ring 12 and the cleaning ring 7. When the gas pushes the cleaning ring 7 to move, air leakage can be avoided. By controlling the rotation of the driving ring 12, the crude oil in this space can be rotated more evenly, thereby improving the density of this space; before the driving ring 12 is pushed to move next time, by controlling the rotation of the driving ring 12, this part of the crude oil can lubricate the driving ring 12, making the movement of the driving ring 12 easier and making it easier to push out the crude oil adhering to the inner wall of the pipe orifice of the U-shaped pipe 52.

[0039] In this embodiment, as Figure 1 shown, the adjusting unit includes a fixing frame 15 connected to the crude oil collection tank 1; the height of the fixing frame 15 exceeds the oil output end; a connecting pipe 16 is arranged at one end of the fixing frame 15 away from the collection tank; one end of the connecting pipe 16 is communicated with the oil output end through a foldable folding pipe 17; the folding pipe 17 can extend as the purification pipe 3 rotates; the other end of the connecting pipe 16 is bent and connected with an infusion pipe.

[0040] The principle and beneficial effects of the above technical solution:

[0041] The gas-oil mixture is input into the folding pipe 17 through the infusion pipe and then enters the purification pipe 3; when the purification pipe 3 rotates, the folding pipe 17 can extend or shorten, so that the purification pipe 3 can still maintain infusion when rotating.

[0042] In this embodiment, a filter cartridge type filter (not shown in the figure) for filtering impurities in the crude oil is detachably installed in the crude oil collection tank 1.

[0043] The principle and beneficial effects of the above technical solution:

[0044] The filter cartridge type filter can block impurities from entering the crude oil collection tank 1, thereby reducing the impurity content rate of the crude oil collected in the crude oil collection tank 1.

[0045] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A gas-liquid separation and purification device, characterized in that: it includes a crude oil collection tank, a gas collection tank, and a purification pipe coaxially arranged between the two and spirally arranged; the purification pipe includes an oil input end and an oil output end communicated with the crude oil collection tank; there is a gap layer between adjacent side walls of the purification pipe along the axial direction of the crude oil collection tank; each gap layer is provided with a number of gas collection pipes located on a concentric circle; the gas collection pipes are arranged close to the inner ring wall of the purification pipe; one end of each gas collection pipe close to the crude oil collection tank is communicated with a side wall of the purification pipe in the gap layer, and the other end is connected to the inner ring wall of the purification pipe; the gas collection pipe farthest from the crude oil collection tank and located on a concentric circle is communicated with the gas collection tank; an adjusting unit is connected to the oil input end for cooperating with the rotation of the purification pipe and maintaining a normal liquid infusion state; one end of the purification pipe is rotatably connected to the crude oil collection tank through the oil output end, and the other end is rotatably connected to the gas collection tank through the gas collection pipe farthest from the crude oil collection tank and located on a concentric circle; a connecting column coaxial with the purification pipe is rotatably connected between the crude oil collection tank and the gas collection tank; the purification pipe and the circumferential side of the connecting column are connected through a reinforcing rod; the connecting column can drive the purification pipe to rotate, and the rotation direction is the same as the spiral direction when the crude oil flows; each gas collection pipe includes a straight pipe arranged parallel to the connecting column and a U-shaped pipe; one end of the straight pipe is connected to the side wall of the purification pipe in the gap layer close to the crude oil collection tank; one end of the U-shaped pipe is vertically connected to the other end of the straight pipe, and the other end of the U-shaped pipe is vertically communicated with the inner ring wall of the purification pipe; a scraping unit for scraping crude oil is arranged inside the end of the U-shaped pipe communicated with the purification pipe; the scraping unit includes a cleaning ring coaxially and slidably arranged inside the U-shaped pipe; the inner ring wall of the cleaning ring has axially symmetrically arranged fixing plates; a ventilation hole is formed between the fixing plate and the inner ring wall of the cleaning ring; a baffle plate coaxial with the cleaning ring and capable of blocking the ventilation hole is rotatably connected to the fixing plate; a fixing block is arranged on the inner wall of the U-shaped pipe; a tension spring is connected between the fixing block and the side wall of the cleaning ring away from the purification pipe; a control valve for controlling the on-off of gas is arranged in each straight pipe; a driving ring is coaxially and rotatably connected to the side wall of the cleaning ring away from the tension spring; a number of scraping grooves are formed on the circumferential side of the driving ring; a scraping block is rotatably connected between the opposite side walls of the scraping groove; a spring is connected between the scraping block and the scraping groove; when the driving ring extends out of the U-shaped pipe, the scraping block pops out under the action of the spring; when the driving ring returns to the U-shaped pipe, the driving ring rotates and returns to the scraping groove.

2. A gas-liquid separation and purification device according to claim 1, characterized in that: the adjusting unit includes a fixing frame connected to the crude oil collection tank; the height of the fixing frame exceeds the oil input end; a connecting pipe is arranged at one end of the fixing frame away from the collection tank; one end of the connecting pipe is communicated with the oil input end through a foldable folding pipe; the folding pipe can extend as the purification pipe rotates; the other end of the connecting pipe is bent and connected with an infusion pipe.

3. A gas-liquid separation and purification device according to claim 2, characterized in that: a filter element type filter for filtering impurities in crude oil is detachably arranged in the crude oil collection tank.

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