Associated gas treatment plant

Abstract

The utility model relates to the field of oil and natural gas processing technology, specifically discloses petroleum associated gas treatment device, including horizontal casing, the casing is equipped with first gas collection chamber and second gas collection chamber, be equipped with air pipe on the first gas collection chamber, the first gas collection chamber and second gas collection chamber are connected through a plurality of hollow airflow pipeline, the front end of air pipe is equipped with filter and impurity removal unit, is used for removing the solid particle in associated gas, the regenerative gas discharge is connected with regenerative gas recovery device, is used for collecting and recycling the gas produced in the regeneration process, the dehydration chamber is equipped with two, can carry out dehydration and regeneration operation alternately, the water inlet pipe department of low temperature water tank is equipped with water quality filtration subassembly, is used for filtering the water that enters low temperature water tank, the utility model discloses through integration filtration, recovery and water quality maintenance system, has improved the efficiency, automation degree, economy and environmental protection of petroleum associated gas treatment significantly.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas processing technology, and specifically discloses a device for treating associated petroleum gas. Background Technology

[0002] Associated gas, a natural gas produced in conjunction with petroleum, aims to improve the overall utilization efficiency of oil and gas resources by processing and recovering liquefied petroleum gas (LPG), stabilizing light hydrocarbons and dry gas. Dehydration is a crucial step in the associated gas treatment process. If dehydration is incomplete, the liquid precipitated during condensation can easily combine with acidic gases in the associated gas, corroding pipelines, valves, and other equipment. It may also cause safety hazards such as abnormal combustion, burner blockage, backfire, or even explosions during the dry gas power generation stage.

[0003] In the prior art, for example, the utility model patent with authorization announcement number CN215757191U discloses a petroleum associated gas treatment device, including a horizontal shell, a first gas collecting chamber, a second gas collecting chamber, a low-temperature water tank, a gas flow pipeline, a low-temperature condensation component, and a dehydration chamber, which can achieve preliminary cooling, condensation dehydration, and deep drying. This device achieves associated gas dehydration through a process of pre-cooling in the low-temperature water tank, condensation in the second gas collecting chamber, and adsorption in the dehydration chamber, but it still has the following drawbacks:

[0004] Without a pretreatment unit, associated petroleum gas often contains solid particulate impurities. Direct entry into the treatment system can easily cause equipment wear and blockage of flow channels, affecting treatment efficiency and equipment lifespan.

[0005] The gas generated during the regeneration of the dehydration medium is usually directly discharged into the atmosphere, which not only wastes resources but may also pollute the environment.

[0006] The low-temperature water tank is not equipped with a water filtration structure. After long-term use, impurities easily accumulate in the water and adhere to the outer wall of the airflow duct, which hinders the heat exchange efficiency, reduces the pre-cooling effect of the associated gas, and consequently affects the subsequent condensation and dehydration efficiency. Furthermore, it requires shutdown for cleaning, reducing the equipment's continuous operation capacity.

[0007] Therefore, there is an urgent need for a petroleum associated gas treatment device that can effectively pre-treat associated gas, recover regenerated gas, and ensure water quality cleanliness. Utility Model Content

[0008] This invention proposes a petroleum associated gas treatment device, which significantly improves the efficiency, automation, economy, and environmental friendliness of petroleum associated gas treatment by integrating filtration, recovery, and water quality maintenance systems.

[0009] This invention is implemented as follows: a petroleum associated gas treatment device includes a horizontal shell. The shell contains a first gas collecting chamber and a second gas collecting chamber. The first gas collecting chamber has an inlet pipe, and the first and second gas collecting chambers are connected by several hollow airflow pipes. A low-temperature water tank is provided between the first and second gas collecting chambers, and a water inlet pipe is provided at the bottom of the low-temperature water tank. The airflow pipes pass through the low-temperature water tank. A low-temperature condensation component is provided in the second gas collecting chamber, and a condensate collection tank is provided at the bottom of the second gas collecting chamber. The condensate collection tank is connected to the external environment through a drain pipe. The second gas collecting chamber is also connected to a dehydration chamber via a gas delivery pipe. The dehydration chamber is filled with a dehydration medium and is equipped with an electric heating wire. The dehydration chamber also has an exhaust pipe and a regeneration gas discharge port.

[0010] The front end of the air intake pipe is equipped with a filtration and impurity removal unit for removing solid particles from the associated gas;

[0011] The regenerated gas emission port is connected to a regenerated gas recovery device for collecting and recovering the gas generated during the regeneration process;

[0012] The dehydration chamber is provided in two parts, which can alternately perform dehydration and regeneration operations;

[0013] The inlet pipe of the low-temperature water tank is equipped with a water filtration component for filtering the water entering the low-temperature water tank.

[0014] As a preferred embodiment of the associated gas treatment device of this utility model, the filtration and impurity removal unit includes a filter box, the top of the filter box is provided with a detachable cover plate, the cover plate is provided with an air inlet, the lower end of which is connected to a filter cylinder extending into the filter box, the bottom of the filter box is provided with a drain port communicating with the filter cylinder, and the side wall of the filter box is provided with a connecting pipe communicating with the air inlet pipe.

[0015] As a preferred embodiment of the associated gas treatment device of this utility model, a differential pressure sensor is provided on the connecting pipe for monitoring the clogging status of the filter cartridge.

[0016] As a preferred embodiment of the associated petroleum gas treatment device of this utility model, the regenerated gas recovery device includes a gas collection pipe, a buffer tank and a return pump. The gas collection pipe is connected to the regenerated gas discharge ports of the two dehydration chambers through a three-way valve, and the other end is connected to the buffer tank. The inlet of the return pump is connected to the buffer tank and the outlet is connected to the inlet pipe.

[0017] In a preferred embodiment of the associated petroleum gas treatment device of this utility model, a gas composition detection sensor is provided on the gas collection pipe, and a first control valve is provided on the pipeline between the return pump and the inlet pipe, the first control valve being signal-connected to the gas composition detection sensor.

[0018] As a preferred embodiment of the associated gas treatment device of this utility model, the exhaust pipe is equipped with a humidity sensor and a second control valve.

[0019] As a preferred embodiment of the associated gas treatment device of this utility model, the water filtration assembly includes a filter screen frame disposed on the inlet pipe, wherein an activated carbon filter screen and a metal filter screen are detachably installed inside the filter screen frame, and the activated carbon filter screen is located on the side close to the low temperature water tank.

[0020] The beneficial effects of this utility model are:

[0021] 1. The filtration and impurity removal unit removes solid particles from the associated gas, preventing equipment wear and flow channel blockage, extending equipment life, and maintaining stable processing efficiency; the addition of a differential pressure sensor can detect filter cartridge blockage in a timely manner, facilitating timely maintenance and further ensuring the pretreatment effect.

[0022] 2. The regenerated gas recovery device avoids resource waste and reduces direct emissions that pollute the environment by collecting, detecting, and returning regenerated gas; the cooperation between gas composition detection sensors and control valves ensures the quality of the recovered gas and improves the safety and rationality of the recovery process.

[0023] 3. The water filtration component uses a dual filtration system of metal and activated carbon filters to ensure the cleanliness of the water in the low-temperature tank, prevent impurities from adhering to the outer wall of the airflow pipe, maintain efficient heat exchange, ensure the pre-cooling effect of the associated gas, thereby improving the efficiency of subsequent condensation and dehydration, reducing the frequency of downtime for cleaning, and enhancing the continuous operation capability of the equipment. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0026] Figure 2 This is a schematic diagram of the structure of the shell and dehydration chamber of this utility model.

[0027] The diagram shows the following components: 1. Housing; 2. First gas collection chamber; 3. Second gas collection chamber; 4. Inlet pipe; 5. Airflow pipe; 6. Low-temperature water tank; 7. Water inlet pipe; 8. Low-temperature condensation assembly; 9. Condensate collection tank; 10. Drain pipe; 11. Gas delivery pipe; 12. Dehydration chamber; 13. Dehydration medium; 14. Electric heating wire; 15. Exhaust pipe; 16. Regeneration gas discharge port; 17. Filtration and impurity removal unit; 18. Regeneration gas recovery device; 19. Water filtration assembly; 20. Filter box; 21. Cover plate; 22. Inlet port; 23. Filter cylinder; 24. Drain port; 25. Connecting pipe; 26. Differential pressure sensor; 27. Gas collection pipe; 28. Buffer tank; 29. ​​Return pump; 30. Gas composition detection sensor; 31. First control valve; 32. Humidity sensor; 33. Second control valve; 34. Filter screen frame; 35. Activated carbon filter screen; 36. Metal filter screen. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0029] Please see Figure 1 and 2 A petroleum associated gas treatment device includes a horizontal shell 1. The shell 1 has a first gas collecting chamber 2 and a second gas collecting chamber 3. The first gas collecting chamber 2 is provided with an air inlet pipe 4. The first gas collecting chamber 2 and the second gas collecting chamber 3 are connected by several hollow airflow pipes 5. The shell 1 has a low-temperature water tank 6 between the first gas collecting chamber 2 and the second gas collecting chamber 3. The airflow pipes 5 pass through the low-temperature water tank 6. The second gas collecting chamber 3 is provided with a low-temperature condensation component 8. The bottom of the second gas collecting chamber 3 is provided with a condensate collection tank 9. The condensate collection tank 9 is connected to the external environment through a drain pipe 10. The second gas collecting chamber 3 is also connected to a dehydration chamber 12 through a gas conveying pipe 11. The dehydration chamber 12 is filled with a dehydration medium 13. The dehydration chamber 12 is also provided with an electric heating wire 14. The dehydration chamber 12 is provided with an exhaust pipe 15 and a regeneration gas discharge port 16.

[0030] The front end of the air intake pipe 4 is equipped with a filter and impurity removal unit 17, which is used to remove solid particles in the associated gas.

[0031] The regenerated gas emission port 16 is connected to a regenerated gas recovery device 18, which is used to collect and recover the gas generated during the regeneration process;

[0032] Two dehydration chambers 12 are provided, which can alternately perform dehydration and regeneration operations;

[0033] A water filtration assembly 19 is installed at the inlet pipe 7 of the low-temperature water tank 6 to filter the water entering the low-temperature water tank 6.

[0034] In this embodiment: Associated petroleum gas is first filtered and impurities removed by the filtration and purification unit 17 at the front end of the inlet pipe 4 to protect downstream equipment; the pre-purified gas enters the first gas collection chamber 2 for buffering and pressure equalization, and then flows into the gas flow pipe 5 immersed in the low-temperature water tank 6 for pre-cooling; the pre-cooled gas enters the second gas collection chamber 3, where it comes into full contact with the low-temperature condensation component 8, causing the water vapor and some light hydrocarbons to condense and liquefy, and the liquid substances are collected in the condensate collection tank 9; the pre-dehydrated gas enters a dehydration chamber 12 in dehydration mode through the gas delivery pipe 11, where the dehydration medium 13 (such as a molecular sieve) deeply adsorbs and dehydrates the gas, ultimately drying it. Gas is output through exhaust pipe 15; at the same time, another dehydration chamber 12 is in regeneration mode, heated by electric heating wire 14, which desorbs the adsorbed water to form regeneration gas. The regeneration gas is no longer directly discharged, but is collected and detected by regeneration gas recovery device 18. If the composition is qualified, it is sent back to the front end of air inlet pipe 4 through return pump 29 to participate in the treatment again, realizing resource recycling; the water inlet of low temperature water tank 6 is continuously purified by water quality filter component 19 to ensure that the heat exchange efficiency of the precooling section remains stable; the entire system uses signal feedback from multiple sensors to intelligently control the opening and closing of each valve and the operation of the equipment by the controller, realizing the alternating operation of the two dehydration chambers 12 and the efficient automatic operation of the system;

[0035] The low-temperature condensing component 8 is a coil heat exchanger or a refrigeration unit.

[0036] As a technical optimization of this utility model, the filtration and impurity removal unit 17 includes a filter box 20. The top of the filter box 20 is provided with a detachable cover plate 21. The cover plate 21 is provided with an air inlet 22. The lower end of the cover plate is connected to a filter cylinder 23 that extends into the filter box 20. The bottom of the filter box 20 is provided with a drain port 24 that communicates with the filter cylinder 23. The side wall of the filter box 20 is provided with a connecting pipe 25 that communicates with the air inlet pipe 4.

[0037] In this embodiment: the filter cartridge 23 effectively intercepts solid particles, and the filter cartridge 23 can be easily replaced by the detachable cover plate 21. Impurities can be discharged in a timely manner through the drain port 24, reducing maintenance difficulty and ensuring the continuous and stable pretreatment effect.

[0038] As a technical optimization of this utility model, a differential pressure sensor 26 is provided on the connecting pipe 25 to monitor the clogging status of the filter cartridge 23.

[0039] In this embodiment, the differential pressure sensor 26 monitors the pressure difference across the filter cartridge 23 in real time. When the differential pressure exceeds the set value, it can promptly remind the staff that the filter cartridge 23 is clogged, making it easy to clean or replace it in time, thus avoiding the impact of filter cartridge 23 clogging on the intake efficiency and pretreatment effect of the associated gas.

[0040] As a technical optimization of this utility model, the regenerated gas recovery device 18 includes a gas collection pipe 27, a buffer tank 28, and a return pump 29. The gas collection pipe 27 is connected to the regenerated gas discharge port 16 of the two dehydration chambers 12 through a three-way valve, and the other end is connected to the buffer tank 28. The inlet of the return pump 29 is connected to the buffer tank 28, and the outlet is connected to the air inlet pipe 4.

[0041] In this embodiment: the regeneration gas from the two dehydration chambers 12 is collected uniformly through a three-way valve. After the gas pressure is stabilized by the buffer tank 28, the regeneration gas is returned to the inlet pipe 4 by the return pump 29 to participate in the treatment again, thereby realizing resource recycling and reducing waste and environmental pollution.

[0042] The three-way valve is automatically controlled by the system controller to switch the collection path of regeneration gas in the two dehydration chambers 12, thus demonstrating the degree of automation of the utility model.

[0043] As a technical optimization of this utility model, a gas composition detection sensor 30 is provided on the gas collection pipe 27, and a first control valve 31 is provided on the pipeline between the return pump 29 and the air inlet pipe 4. The first control valve 31 is connected to the gas composition detection sensor 30.

[0044] In this embodiment: the gas composition detection sensor 30 monitors the composition of the recovered gas in real time. If the composition does not meet the processing requirements, the return channel can be closed by the first control valve 31 connected to the sensor signal to avoid the unqualified gas from affecting subsequent processing. If the composition is qualified, the first control valve 31 is opened to realize normal return, thereby improving the safety and rationality of the recovery process.

[0045] As a technical optimization of this utility model, the exhaust pipe 15 is provided with a humidity sensor 32 and a second control valve 33.

[0046] In this embodiment: the humidity sensor 32 monitors the humidity of the exhaust gas in real time. If the humidity exceeds the standard, the exhaust rhythm can be adjusted through the second control valve 33 or feedback can be sent to the system to facilitate timely troubleshooting of abnormal operation of the dehydration chamber 12. The second control valve 33 can also control the exhaust when the equipment starts up, stops or malfunctions, to ensure stable system operation and ensure that the output gas meets the drying requirements.

[0047] As a technical optimization of this utility model, the water filtration assembly 19 includes a filter screen frame 34 disposed on the water inlet pipe 7. An activated carbon filter screen 35 and a metal filter screen 36 are detachably installed in the filter screen frame 34. The activated carbon filter screen 35 is located on the side close to the low temperature water tank 6.

[0048] In this embodiment: the metal filter screen 36 first intercepts larger particulate impurities in the water, and the activated carbon filter screen 35 then adsorbs smaller impurities and odors in the water. The dual filtration ensures the cleanliness of the water entering the low-temperature water tank 6. The detachable design facilitates filter replacement and cleaning, ensuring long-term stable water filtration effect.

[0049] Working principle and usage process of this utility model:

[0050] Associated petroleum gas enters the inlet pipe 4 and first passes through the filtration and impurity removal unit 17 (filter cartridge 23 inside the filter box 20) to filter solid particulate impurities. The differential pressure sensor 26 monitors the blockage status of the filter cartridge 23, and the impurities are periodically discharged through the drain port 24. The pretreated associated gas enters the first gas collection chamber 2. External water is filtered by the water quality filtration component 19 (metal filter screen 36 filters first, activated carbon filter screen 35 adsorbs later) and then enters the low-temperature water tank 6 to maintain the cleanliness of the water in the tank and prevent impurities from adhering to the airflow pipe 5. The associated gas in the first gas collection chamber 2 exchanges heat with the clean water in the tank through the airflow pipe 5 that passes through the low-temperature water tank 6 to achieve pre-cooling of the associated gas. The pre-cooled associated gas enters the second gas collection chamber 3, where the low-temperature condensation component 8 further cools it. The water vapor condenses into water and falls into the condensate collection tank 9, and then is discharged through the drain pipe 10. The condensed associated gas enters one of the dehydration chambers 12 through the gas delivery pipe 11, where the dehydration medium 13 adsorbs the remaining water. The remaining moisture is removed, and the humidity sensor 32 on the exhaust pipe 15 monitors the gas humidity. Qualified gas is discharged through the exhaust pipe 15, and the second control valve 33 adjusts the exhaust according to the humidity. When the working dehydration chamber 12 needs regeneration, it is switched to another dehydration chamber 12 to continue dehydration. The electric heating wire 14 heats it, desorbing the adsorbed moisture to form regeneration gas. The regeneration gas generated by the regeneration dehydration chamber 12 enters the gas collection pipe 27 through the regeneration gas discharge port 16. The three-way valve guides the gas into the buffer tank 28. The gas composition detection sensor 30 detects the composition. If it is qualified, the return pump 29 returns the gas to the air inlet pipe 4 for reprocessing. If it is not qualified, the first control valve 31 is closed to block the return. The two dehydration chambers 12 alternately complete dehydration and regeneration to ensure continuous operation of the equipment. The filter cartridge 23 of the filtration and impurity removal unit 17 is replaced periodically through the detachable cover plate 21, and the filter screen of the water quality filtration component 19 is replaced through the detachable structure to ensure long-term stable operation of each component.

[0051] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0052] However, the above are merely specific embodiments of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A petroleum associated gas processing device, comprising a horizontal shell (1), wherein the shell (1) is provided with a first gas collecting chamber (2) and a second gas collecting chamber (3), the first gas collecting chamber (2) is provided with an inlet pipe (4), the first gas collecting chamber (2) and the second gas collecting chamber (3) are connected by a plurality of hollow gas flow pipes (5), the shell (1) is provided with a low temperature water tank (6) between the first gas collecting chamber (2) and the second gas collecting chamber (3), the shell (1) is provided with a water inlet pipe (7) at the bottom of the low temperature water tank (6), and the gas flow pipes (5) are connected to the low temperature water tank (6). The second gas collecting chamber (3) is equipped with a low-temperature condensation component (8), and a condensate collection tank (9) is provided at the bottom of the second gas collecting chamber (3). The condensate collection tank (9) is connected to the external environment through a drain pipe (10). The second gas collecting chamber (3) is also connected to a dehydration chamber (12) through a gas conveying pipe (11). The dehydration chamber (12) is filled with a dehydration medium (13). An electric heating wire (14) is also provided on the dehydration chamber (12). An exhaust pipe (15) and a regeneration gas discharge port (16) are provided on the dehydration chamber (12). The features are: The intake pipe (4) is equipped with a filter and impurity removal unit (17) at the front end, which is used to remove solid particles in the associated gas. The regenerated gas discharge port (16) is connected to a regenerated gas recovery device (18) for collecting and recovering the gas generated during the regeneration process; The dehydration chamber (12) is provided in two parts, which can alternately perform dehydration and regeneration operations; The inlet pipe (7) of the low-temperature water tank (6) is equipped with a water quality filter assembly (19) for filtering the water entering the low-temperature water tank (6).

2. The associated petroleum gas treatment device according to claim 1, characterized in that: The filtration and impurity removal unit (17) includes a filter box (20), the top of the filter box (20) is provided with a detachable cover plate (21), the cover plate (21) is provided with an air inlet (22), the lower end of which is connected to a filter cylinder (23) extending into the filter box (20), the bottom of the filter box (20) is provided with a drain port (24) communicating with the filter cylinder (23), and the side wall of the filter box (20) is provided with a connecting pipe (25) communicating with the air inlet pipe (4).

3. The associated petroleum gas treatment device according to claim 2, characterized in that: A differential pressure sensor (26) is provided on the connecting pipe (25) to monitor the blockage status of the filter cartridge (23).

4. The associated petroleum gas treatment device according to claim 1, characterized in that: The regenerated gas recovery device (18) includes a gas collection pipe (27), a buffer tank (28), and a return pump (29). The gas collection pipe (27) is connected to the regenerated gas discharge port (16) of the two dehydration chambers (12) through a three-way valve, and the other end is connected to the buffer tank (28). The inlet of the return pump (29) is connected to the buffer tank (28), and the outlet is connected to the air inlet pipe (4).

5. The associated petroleum gas treatment device according to claim 4, characterized in that: The gas collection pipe (27) is equipped with a gas composition detection sensor (30), and a first control valve (31) is provided on the pipeline between the return pump (29) and the inlet pipe (4). The first control valve (31) is connected to the gas composition detection sensor (30) via signal.

6. The associated petroleum gas treatment device according to claim 1, characterized in that: The exhaust pipe (15) is equipped with a humidity sensor (32) and a second control valve (33).

7. The associated petroleum gas treatment device according to claim 1, characterized in that: The water filtration assembly (19) includes a filter screen frame (34) located in the water inlet pipe (7). An activated carbon filter screen (35) and a metal filter screen (36) are detachably installed in the filter screen frame (34). The activated carbon filter screen (35) is located on the side close to the low temperature water tank (6).

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