Piston compression type petroleum associated gas separation and pressure recovery device

Abstract

This utility model relates to the field of associated petroleum gas recovery technology, and discloses a piston compression type associated petroleum gas separation, boosting, and recovery device, including an air inlet pipe, with a main control valve externally located on the air inlet pipe. This utility model uses a butterfly-shaped filter cartridge to efficiently intercept large particulate impurities, while an impeller drives a scraper to scrape impurities off the cylinder wall in real time, achieving simultaneous "filtration + dynamic cleaning" to ensure long-term filtration effectiveness. The filter element filters smaller dust and oil mist particles, and the agglomeration layer captures and merges oil mist into oil droplets, causing them to accumulate in the oil storage chamber, achieving a dual effect of "impurity removal + oil collection," further improving gas cleanliness. The activated carbon composite adsorption plate adsorbs odor molecules and residual fine oil mist, ensuring that the final output gas cleanliness fully meets the requirements of the subsequent piston compression boosting system, preventing impurities from entering the boosting components and causing wear and malfunctions, thus extending the service life of the boosting equipment.

Description

Technical Field

[0001] This utility model relates to the field of associated petroleum gas recovery technology, and in particular to a piston compression type associated petroleum gas separation and pressurization recovery device. Background Technology

[0002] During oil extraction, a type of natural gas, known as "associated petroleum gas," is generated alongside crude oil. Direct discharge or combustion of this gas not only wastes energy but also pollutes the environment. The piston compression type associated petroleum gas separation, pressurization, and recovery device is an integrated process that utilizes "separation and purification - compression and pressurization - recovery and utilization" to achieve the resource-based treatment of associated petroleum gas, combining environmental protection and energy-saving value.

[0003] Patent CN223075522U discloses a piston-compression type petroleum associated gas separation, pressurization, and recovery device, belonging to the field of petroleum associated gas recovery technology. It includes an inlet pipe, a compression inlet device, a motor, an air compressor, and a gas-liquid separator. One end of the inlet pipe is connected to a flow pipe, and the other end of the flow pipe is connected to the compression inlet device. The lower end of the flow pipe is connected to the upper part of the main body cylinder. A sliding plate is slidably connected to the inside of the main body cylinder. First grooves are formed on both sides of the sliding plate, and a slider is located within and slidably connected to the first groove. A first spring is located between the slider and the first groove. One end of a first sliding rod is connected to the slider, and the other end of the first sliding rod passes through the first groove and is slidably connected to it. A second spring is located between the sliding plate and the lower end of the main body cylinder, and a limiting device is located at the lower part of the main body cylinder. The other end of the second sliding rod passes through the main body cylinder and extends into the limiting device. This design addresses the problems of large gas collection tanks occupying significant space and low air compressor utilization.

[0004] The aforementioned patent lacks a pre-filter during use, allowing associated gas containing impurities to directly enter the compression intake device. Over time, this damages internal components, affects gas path sealing, and causes the pressure control function of the compression intake device to fail, significantly reducing its lifespan and preventing it from opening and closing the gas path at preset pressures. Furthermore, metal debris and accumulated impurities from wear within the compression intake device enter subsequent filters along with the associated gas. Filters that originally only needed to filter the original impurities in the associated gas now need to filter new impurities generated by the wear of the compression intake device, leading to rapid clogging of the filter element and increased filter workload. Therefore, a piston-compression type associated petroleum gas separation, pressurization, and recovery device is proposed for improvement. Utility Model Content

[0005] In view of the fact that the existing devices lack pre-filtration, which easily leads to physical wear of precision sliding parts, reducing equipment life, and causes problems such as overload of subsequent filters and rapid clogging of filter elements, this utility model is proposed.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a piston compression type petroleum associated gas separation, pressurization and recovery device, including an air inlet pipe, a main control valve provided outside the air inlet pipe, a pre-filter device fixedly sleeved at one end of the air inlet pipe, a C-shaped pipe provided at the outlet end of the pre-filter device, a fixed cylinder connected to the upper end of the C-shaped pipe, an inductive switch provided below the fixed cylinder, a gas delivery pipe connected to the lower end of the C-shaped pipe, and an inductive control valve provided outside the gas delivery pipe; A butterfly-shaped filter cylinder is installed on one side of the inner wall of the pre-filter device, a filter element is installed in the middle of the inner wall of the pre-filter device, and an activated carbon composite adsorption plate is installed on the other side of the inner wall of the pre-filter device. A first connecting groove is opened in the inner wall of the butterfly-shaped filter cylinder, and a box groove is opened on one side of the bottom of the pre-filter device. The butterfly-shaped filter cylinder is connected to the box groove through the first connecting groove. An oil storage chamber is opened on the other side of the bottom of the pre-filter device. A second connecting groove is opened in the inner wall of the oil storage chamber. The second connecting groove is located below the filter element. An S-shaped oil drain pipe is sleeved at the bottom of the oil storage chamber, and a first control valve is provided on the outside of the S-shaped oil drain pipe.

[0007] As a preferred embodiment, the following configuration is provided: an impeller is installed on the inner wall of the butterfly-shaped filter cylinder; a transmission rod is fixedly sleeved inside the impeller; one end of the transmission rod is rotatably connected to the inner wall of the butterfly-shaped filter cylinder and connected to a scraper; the surface of the scraper is in contact with the inner wall of the butterfly-shaped filter cylinder; a storage box is slidably connected to the inner wall of the trough; a sliding groove is provided in the middle of the pre-filter device; a sliding rod is slidably connected to the middle of the pre-filter device; an annular block is fixedly sleeved on the surface of the sliding rod; the annular block is slidably connected to the inner wall of the sliding groove; a first spring is sleeved on the surface of the sliding rod; and the two ends of the first spring are respectively connected to the inner wall of the sliding groove and one side of the annular block.

[0008] As a preferred embodiment, a sealing plate is fixedly connected to one end of the slide rod, and the sealing plate is slidably connected to the inner wall of the first connecting groove.

[0009] As a preferred embodiment, the storage bin extension plate is provided with bolts inside, the bolts are threadedly connected to the side wall of the pre-filter device, and one end of the bolt abuts against the other end of the slide rod.

[0010] As a preferred embodiment, the bottom wall of the fixed cylinder is slidably connected to a sliding column, the top end of the sliding column is fixedly connected to a piston plate, the side wall of the piston plate is provided with a polytetrafluoroethylene guide ring, and a second spring is sleeved on the surface of the sliding column, with the two ends of the second spring connected to the bottom end of the piston plate and the bottom wall of the fixed cylinder, respectively.

[0011] As a preferred embodiment, the bottom end of the sliding column is fixedly connected to a limit block, the bottom end of the fixed cylinder is fixedly connected to a mounting bracket, the top end of the mounting bracket is equipped with an inductive switch, and the upper part of the side wall of the fixed cylinder is provided with a pressure gauge.

[0012] As a preferred embodiment, the gas supply pipe is equipped with a filter at one end, an air compressor is installed above the filter, a gas-liquid separator is installed above the air compressor, a radiator is installed on one side of the gas-liquid separator, a one-way valve is sleeved below the radiator, and an oil supply pipe is installed outside the one-way valve.

[0013] Compared with the prior art, the present invention has at least the following beneficial effects: 1. This utility model can efficiently intercept large particulate impurities through a butterfly-shaped filter cartridge, while the impeller drives the scraper to scrape off impurities from the cartridge wall in real time, achieving "filtration + dynamic cleaning" simultaneously to ensure long-term filtration effect. The filter element filters out dust and oil mist particles with smaller diameters, and the agglomeration layer can capture oil mist and merge it into oil droplets, which are then collected in the oil storage chamber, achieving the dual effect of "impurity removal + oil collection", further improving gas cleanliness. The activated carbon composite adsorption plate can adsorb odor molecules and residual fine oil mist, ensuring that the cleanliness of the final output gas fully meets the requirements of the subsequent piston compression and booster system, preventing impurities from entering the booster components and causing wear and failure, thus extending the service life of the booster equipment.

[0014] 2. In this invention, impurities are collected in a storage tank through the first connecting groove, oil sludge flows into the oil storage chamber through the second connecting groove, and the purified associated gas enters the subsequent gas path. The three are completely separated through independent collection and transmission paths, which not only avoids impurities from mixing with oil sludge and affecting the quality of oil recovery, but also prevents oil sludge from adhering to impurities and increasing the difficulty of cleaning, thus improving the purity of resource recovery. At the same time, it avoids the problems of overload and rapid blockage of subsequent filters. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front view enlarged structural schematic diagram of the pre-filter device in this utility model; Figure 3 This is a front view cross-sectional structural diagram of the pre-filter device in this utility model; Figure 4 This is a side view sectional structural diagram of the pre-filter device in this utility model; Figure 5 This is a front view cross-sectional structural diagram of the fixed cylinder in this utility model.

[0016] Explanation of reference numerals in the attached figures: 1. Inlet pipe; 2. Main control valve; 3. Pre-filter; 31. Butterfly filter cartridge; 32. Filter element; 33. Activated carbon composite adsorption plate; 34. First connecting groove; 35. Tank; 36. Miscellaneous storage box; 37. Oil storage chamber; 38. Impeller; 39. Drive rod; 310. Scraper; 311. Slide groove; 312. Slide rod; 313. Annular block; 314. First spring; 315. Sealing plate; 316. Bolt; 317. Second connecting... 318. S-shaped oil drain pipe; 319. First control valve; 4. C-shaped pipe; 5. Fixed cylinder; 51. Sliding column; 52. Piston plate; 53. PTFE guide ring; 54. Second spring; 55. Limit block; 56. Mounting bracket; 57. Pressure gauge; 6. Air supply pipe; 61. Inductive switch; 62. Inductive control valve; 7. Filter; 8. Air compressor; 9. Gas-liquid separator; 10. Radiator; 11. Oil supply pipe; 12. Check valve. Detailed Implementation

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0018] Reference Figures 1-5 This is the first embodiment of the present invention, which provides a piston compression type petroleum associated gas separation, pressurization and recovery device, including an air inlet pipe 1, a main control valve 2 provided outside the air inlet pipe 1, a pre-filter device 3 fixedly connected to one end of the air inlet pipe 1, a C-shaped pipe 4 provided at the outlet end of the pre-filter device 3, a fixed cylinder 5 connected to the upper end of the C-shaped pipe 4, an induction switch 61 provided below the fixed cylinder 5, a gas delivery pipe 6 connected to the lower end of the C-shaped pipe 4, and an induction control valve 62 provided outside the gas delivery pipe 6; A butterfly filter cylinder 31 is installed on one side of the inner wall of the pre-filter device 3, a filter element 32 is installed in the middle of the inner wall of the pre-filter device 3, and an activated carbon composite adsorption plate 33 is installed on the other side of the inner wall of the pre-filter device 3. A first connecting groove 34 is opened on the inner wall of the butterfly filter cylinder 31, and a box groove 35 is opened on one side of the bottom of the pre-filter device 3. The butterfly filter cylinder 31 is connected to the box groove 35 through the first connecting groove 34. An oil storage chamber 37 is opened on the other side of the bottom of the pre-filter device 3. A second connecting groove 317 is opened on the inner wall of the oil storage chamber 37. The second connecting groove 317 is located below the filter element 32. An S-shaped oil drain pipe 318 is sleeved at the bottom of the oil storage chamber 37. A first control valve 319 is provided on the outside of the S-shaped oil drain pipe 318. An impeller 38 is installed on the inner wall of the butterfly filter cylinder 31. A transmission rod 39 is fixedly sleeved inside the impeller 38. One end of the transmission rod 39 is rotatably connected to the inner wall of the butterfly filter cylinder 31 and connected to a scraper 310. The surface of the scraper 310 is in contact with the inner wall of the butterfly filter cylinder 31. A storage box 36 is slidably connected to the inner wall of the box groove 35. A slide groove 311 is opened in the middle of the pre-filter device 3. A slide rod 312 is slidably connected in the middle of the pre-filter device 3. An annular block 313 is fixedly sleeved on the surface of the slide rod 312. The annular block 313 is slidably connected to the inner wall of the slide groove 311. A first spring 314 is sleeved on the surface of the slide rod 312. The two ends of the first spring 314 are respectively connected to the inner wall of the slide groove 311 and one side of the annular block 313. One end of the slide bar 312 is fixedly connected to a sealing plate 315, and the sealing plate 315 is slidably connected to the inner wall of the first connecting groove 34. The storage box 36 has a bolt 316 inside the extension plate. The bolt 316 is threaded to the side wall of the pre-filter device 3, and one end of the bolt 316 abuts against the other end of the slide rod 312.

[0019] Specifically, the main control valve 2 can adjust the total intake of associated gas or cut off the gas path in an emergency according to the actual recovery needs, so as to avoid safety risks in case of sudden pressure rise in the gas path or equipment failure. During filtration, the associated gas flowing out from the inlet pipe 1 directly enters the butterfly filter cylinder 31 inside the pre-filter device 3. The butterfly filter cylinder 31 can efficiently intercept large particles of impurities such as mud, sand and metal fragments carried in the associated gas. As the associated gas flows, the airflow drives the impeller 38 to rotate. The impeller 38 drives the scraper 310 to rotate synchronously through the transmission rod 39. During the rotation of the scraper 310, impurities attached to the wall of the butterfly filter cylinder 31 can be scraped off in real time to prevent impurities from accumulating and clogging the filter holes, thus maintaining smooth airflow. The impurities fall into the impurity storage box 36 through the first connecting groove 34 for collection. The associated gas, after being initially filtered by the butterfly filter cartridge 31, enters the filter element 32 in the middle. The filter element 32 is a composite coalescing filter element, which can filter out impurities such as dust and oil mist particles with smaller diameters in the associated gas, further improving the cleanliness of the gas. When the airflow passes through the filter element 32, the oil mist is captured and merged by the coalescing layer, and the oil droplets formed slide down along the inner wall of the filter element 32 and enter the oil storage chamber 37 through the second connecting groove 317. The associated gas passing through filter element 32 eventually flows through activated carbon composite adsorption plate 33. The porous structure of activated carbon can adsorb odor molecules and trace organic impurities such as hydrocarbon derivatives in the associated gas. At the same time, the composite adsorption layer can further adsorb residual fine oil mist, ensuring that the output gas meets the cleanliness requirements of subsequent pressurization and recovery. When it is necessary to clean the storage box 36, the storage box 36 can be pulled out by unscrewing the bolt 316. The operation is convenient. At the same time as unscrewing the bolt 316, the force applied by the bolt 316 to the slide rod 312 is contacted. At this time, the first spring 314 rebounds and pushes the annular block 313 to slide along the slide groove 311, thereby driving the sealing plate 315 to seal the first connecting groove 34, preventing unfiltered associated gas from leaking from the groove opening and ensuring operational safety. When the amount of oil in the oil storage chamber 37 reaches a certain level, the operator can open the first control valve 319. Through the buffering effect of the S-shaped oil drain pipe 318, the oil can be discharged smoothly, achieving the separation of oil, gas, and impurities.

[0020] Reference Figures 1-5 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that: a sliding column 51 is slidably connected to the bottom wall of the fixed cylinder 5, a piston plate 52 is fixedly connected to the top of the sliding column 51, a polytetrafluoroethylene guide ring 53 is provided on the side wall of the piston plate 52, and a second spring 54 is sleeved on the surface of the sliding column 51. The two ends of the second spring 54 are respectively connected to the bottom end of the piston plate 52 and the bottom wall of the fixed cylinder 5. A limit block 55 is fixedly connected to the bottom end of the sliding column 51, and a mounting bracket 56 is fixedly connected to the bottom end of the fixed cylinder 5. An induction switch 61 is installed on the top of the mounting bracket 56, and a pressure gauge 57 is provided on the upper side wall of the fixed cylinder 5.

[0021] Specifically, the associated gas purified by the pre-filter 3 flows into the upper cavity of the fixed cylinder 5 through the C-shaped tube 4. The associated gas forms a stable pressure environment here, and its pressure acts directly on the top surface of the piston plate 52. When the pressure value exceeds the preload threshold of the second spring 54, the pressure difference pushes the piston plate 52 to slide downward along the inner wall of the fixed cylinder 5. The polytetrafluoroethylene guide ring 53 can reduce the frictional loss between the piston plate 52 and the inner wall of the fixed cylinder 5, and at the same time assist in sealing to prevent the associated gas from leaking from the gap between the two, ensuring accurate pressure transmission. When the piston plate 52 slides downward, it drives the limit block 55 to move synchronously through the slide column 51 until the bottom of the limit block 55 contacts the induction switch 61. At this time, the induction switch 61 controls the induction control valve 62 to open, so that the clean associated gas in the fixed cylinder 5, which has been confirmed by pressure, enters the gas delivery pipe 6 and is delivered to the subsequent stage by the gas delivery pipe 6.

[0022] Reference Figures 1-5 This is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that: a filter 7 is provided at one end of the air supply pipe 6, an air compressor 8 is provided above the filter 7, a gas-liquid separator 9 is provided above the air compressor 8, a radiator 10 is provided on one side of the gas-liquid separator 9, a one-way valve 12 is sleeved below the radiator 10, and an oil supply pipe 11 is provided outside the one-way valve 12.

[0023] During use, the associated gas first enters the filter 7 through the gas supply pipe 6 for fine filtration. The clean associated gas flowing out of the filter 7 is introduced into the air compressor 8, where the air compressor 8 compresses the associated gas. The high-pressure associated gas is then transported to the gas-liquid separator 9 for gas-liquid separation, and then passes through the radiator 10 for heat dissipation. Finally, it is collected in the oil supply pipe 11 for discharge. After the liquid is discharged, the one-way valve 12 automatically closes under the action of the spring force to prevent the oil in the oil supply pipe 11 from flowing back to the radiator 10 and to avoid contaminating the purified associated gas.

[0024] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A piston compression type petroleum associated gas separation and pressure recovery device comprising an air inlet pipe (1), characterized in that: The intake pipe (1) is provided with a main control valve (2) on the outside. A pre-filter device (3) is fixedly connected to one end of the intake pipe (1). A C-shaped pipe (4) is provided at the outlet end of the pre-filter device (3). A fixed cylinder (5) is connected to the upper end of the C-shaped pipe (4). A sensor switch (61) is provided below the fixed cylinder (5). An air supply pipe (6) is connected to the lower end of the C-shaped pipe (4). A sensor control valve (62) is provided on the outside of the air supply pipe (6). A butterfly filter cylinder (31) is installed on one side of the inner wall of the pre-filter (3), a filter element (32) is installed in the middle of the inner wall of the pre-filter (3), and an activated carbon composite adsorption plate (33) is installed on the other side of the inner wall of the pre-filter (3). A first connecting groove (34) is opened on the inner wall of the butterfly filter cylinder (31), and a box groove (35) is opened on one side of the bottom of the pre-filter (3). The butterfly filter cylinder (31) is connected to the box groove (35) through the first connecting groove (34). An oil storage chamber (37) is opened on the other side of the bottom of the pre-filter (3). A second connecting groove (317) is opened on the inner wall of the oil storage chamber (37). The second connecting groove (317) is located below the filter element (32). An S-shaped oil drain pipe (318) is sleeved at the bottom of the oil storage chamber (37). A first control valve (319) is provided on the outside of the S-shaped oil drain pipe (318).

2. A piston-compression type petroleum associated gas separation and pressure recovery device according to claim 1, characterized in that: An impeller (38) is installed on the inner wall of the butterfly filter cylinder (31). A transmission rod (39) is fixedly sleeved inside the impeller (38). One end of the transmission rod (39) is rotatably connected to the inner wall of the butterfly filter cylinder (31) and connected to a scraper (310). The surface of the scraper (310) is in contact with the inner wall of the butterfly filter cylinder (31). A storage box (36) is slidably connected to the inner wall of the box groove (35). A sliding groove (311) is opened in the middle of the pre-filter device (3). A sliding rod (312) is slidably connected in the middle of the pre-filter device (3). An annular block (313) is fixedly sleeved on the surface of the sliding rod (312). The annular block (313) is slidably connected to the inner wall of the sliding groove (311). A first spring (314) is sleeved on the surface of the sliding rod (312). The two ends of the first spring (314) are respectively connected to the inner wall of the sliding groove (311) and one side of the annular block (313).

3. A piston-compression type petroleum associated gas separation and pressure recovery device according to claim 2, characterized in that: A sealing plate (315) is fixedly connected to one end of the slide rod (312), and the sealing plate (315) is slidably connected to the inner wall of the first connecting groove (34).

4. The piston compression type petroleum associated gas separation, pressurization, and recovery device according to claim 2, characterized in that: The storage box (36) has a bolt (316) inside the extension plate. The bolt (316) is threaded to the side wall of the pre-filter device (3). One end of the bolt (316) abuts against the other end of the slide rod (312).

5. The piston compression type petroleum associated gas separation, pressurization, and recovery device according to claim 1, characterized in that: The bottom wall of the fixed cylinder (5) is slidably connected to a sliding column (51), and the top end of the sliding column (51) is fixedly connected to a piston plate (52). The side wall of the piston plate (52) is provided with a polytetrafluoroethylene guide ring (53). The surface of the sliding column (51) is fitted with a second spring (54), and the two ends of the second spring (54) are respectively connected to the bottom end of the piston plate (52) and the bottom wall of the fixed cylinder (5).

6. A piston compression type petroleum associated gas separation, pressurization, and recovery device according to claim 5, characterized in that: The bottom end of the sliding column (51) is fixedly connected to a limit block (55), the bottom end of the fixed cylinder (5) is fixedly connected to a mounting bracket (56), the top end of the mounting bracket (56) is equipped with an induction switch (61), and the upper part of the side wall of the fixed cylinder (5) is provided with a pressure gauge (57).

7. A piston compression type petroleum associated gas separation, pressurization, and recovery device according to claim 1, characterized in that: A filter (7) is provided at one end of the air supply pipe (6), an air compressor (8) is provided above the filter (7), a gas-liquid separator (9) is provided above the air compressor (8), a radiator (10) is provided on one side of the gas-liquid separator (9), a one-way valve (12) is sleeved below the radiator (10), and an oil supply pipe (11) is provided outside the one-way valve (12).

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