Oil-gas separation and recovery device

Abstract

The utility model belongs to the technical field of oil-gas separation, and particularly relates to an oil-gas separation and recovery device which comprises a venturi ejector, a high-pressure gas source, a cold air source and a recovery component, and the venturi ejector is provided with an oil steam inlet, a high-pressure gas inlet, a cold air inlet and an output port. The high-pressure gas inlet and the output port are oppositely formed in the two ends of the Venturi ejector, the oil steam inlet and the cold air inlet are formed in the side, close to the high-pressure gas inlet, of the throat pipe, and oil steam, high-pressure gas and cold air are introduced into the Venturi ejector through pipelines. The venturi ejector is connected with an output pipeline at an output port of the venturi ejector, and the recovery assembly is arranged on the output pipeline. High-pressure gas is introduced into the Venturi ejector, negative pressure is generated in the Venturi ejector to suck oil steam and cold air, the oil steam and the cold air are fully mixed at the throat pipe, the condensation phase change effect of an oil-gas mixture in the throat pipe and a follow-up pipeline is improved, and condensed oil drops are collected through the recovery assembly.

Description

Technical Field

[0001] This utility model belongs to the field of oil and gas separation technology, and specifically relates to an oil and gas separation and recovery device. Background Technology

[0002] In refining and chemical production facilities, a large number of large mechanical equipment such as steam turbines, compressors, and generators are equipped with lubrication stations as core components of the critical lubrication system. These stations ensure the stable operation of rotating parts through continuous lubrication and cooling. However, during the lubrication process, lubricating oil inevitably experiences a temperature rise due to gear meshing, bearing friction, and heat transfer effects. As the temperature repeatedly rises, the lubricating oil gradually atomizes and carries carbonized particles, escaping from the oil tank exhaust port. These high-temperature oil mists condense in the ambient air, forming suspended oil droplets. If discharged directly without treatment, this not only leads to increased oil loss but also causes serious environmental pollution. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an oil-gas separation and recovery device that separates and recovers oil mist from oil vapor.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an oil-gas separation and recovery device, including a Venturi injector, a high-pressure gas source, a cold air source, and a recovery component. The Venturi injector is provided with an oil vapor inlet, a high-pressure gas inlet, a cold air inlet, and an outlet. The high-pressure gas inlet and the outlet are arranged opposite to each other at both ends of the Venturi injector. The oil vapor inlet and the cold air inlet are arranged on the side of the throat pipe near the high-pressure gas inlet. The oil vapor, high-pressure gas, and cold air are respectively introduced into the Venturi injector through pipelines. An output pipeline is connected to the outlet of the Venturi injector, and the recovery component is arranged on the output pipeline.

[0005] Preferably, the diameter of the oil vapor inlet of the Venturi injector is 10-15 mm, and the diameter of the throat is 9-13 mm.

[0006] Preferably, the diameter of the oil vapor inlet of the Venturi injector is 12.86 mm, and the diameter of the throat is 11 mm.

[0007] Preferably, in the Venturi injector, the area between the throat and the outlet is a diffusion zone, the diameter of the throat is smaller than the diameter of the outlet, and the expansion angle of the diffusion zone is 10°~13°.

[0008] Preferably, the expansion angle of the diffusion region is 11.24°.

[0009] Preferably, the high-pressure air source is an air compressor, the cold air source is a vortex tube, the output end of the air compressor is connected to the high-pressure air inlet of the Venturi injector through a high-pressure delivery pipeline, the output end of the air compressor is connected to the vortex tube through a cooling delivery pipeline, and the cold air outlet end of the vortex tube is connected to the cold air inlet of the Venturi injector.

[0010] Preferably, a buffer tank is connected to the output end of the air compressor.

[0011] Preferably, an air flow meter is installed on the high-pressure transmission pipeline.

[0012] Preferably, the recycling assembly includes at least a three-way collection pipe and a filter element, the three-way collection pipe being located near the Venturi injector, and the collection section of the three-way collection pipe being located on the lower side of the output pipe.

[0013] Preferably, the filter element is a coalescing filter element.

[0014] Preferably, a pressure gauge and a temperature gauge are installed on each of the aforementioned pipelines.

[0015] Preferably, valves are installed on the pipelines through which the oil vapor, high-pressure gas, and cold air enter the Venturi injector.

[0016] Compared with existing technologies, the above technical solution has the following beneficial effects:

[0017] 1. This utility model is equipped with a Venturi injector. High-pressure gas is introduced into the Venturi injector. When the high-pressure gas passes through the narrowed throat, it generates low pressure. The low pressure draws in oil vapor. The high-pressure gas introduced into the Venturi injector also exchanges heat with the oil vapor, but the heat exchange efficiency is low and insufficient to completely cool the oil mist in the oil vapor. Therefore, this utility model introduces high-pressure gas into the Venturi injector. The high-pressure gas generates negative pressure at the throat of the Venturi injector. The negative pressure draws in oil vapor and cold air. The oil vapor and cold air are fully mixed at the throat, which increases the condensation phase change effect of the oil-gas mixture in the throat and subsequent pipelines. The recovery component collects the condensed oil droplets.

[0018] 2. Function of Venturi ejector: It generates negative pressure inside the ejector to draw in steam; the steam and the lower-temperature kinetic fluid exchange heat to cool down, causing the oil vapor to undergo a phase change; it also collidees and agglomerates smaller lubricating oil droplets into larger droplets, facilitating the separation of gas and liquid fluids in subsequent devices.

[0019] 3. The high-pressure air source is an air compressor, and the cold air source is a vortex tube. The air compressor provides high-pressure air, and at the same time, the air compressor provides high-pressure air to the vortex tube for heat exchange to generate cold air. A buffer tank is connected to the output end of the air compressor. The buffer tank can store a certain amount of compressed air, reduce pressure fluctuations, stabilize pressure, and also cool the air, separate condensate, and intercept impurities.

[0020] 4. Using response surface methodology and numerical simulation, the diameter of the oil vapor inlet of the Venturi ejector was designed to be 12.86 mm, the diameter at the throat was 11 mm, and the expansion angle of the diffusion zone was 11.24°. Under these dimensions, the Venturi ejector has the greatest power to draw lubricating oil vapor.

[0021] 5. The recovery assembly includes at least one three-way collection pipe and one filter element. When the condensed oil droplets are discharged through the output pipe, they can directly pass through the three-way collection pipe and be collected. The filter element can intercept and collect small particles of condensed oil droplets, ensuring that clean air is discharged from the end of the output pipe. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] Figure 2 This is a cross-sectional view of a Venturi injector.

[0024] The components include: 1. Oil tank; 2. Oil vapor delivery pipeline; 3. Pressure gauge; 4. Temperature gauge; 5. Valve; 6. High-pressure delivery pipeline; 7. Cooling delivery pipeline; 8. Air compressor; 9. Buffer tank; 10. High-pressure gas delivery pipeline; 11. Air flow meter; 12. Venturi injector; 1201. Oil vapor inlet; 1202. High-pressure gas inlet; 1203. Cold air inlet; 1204. Output port; 1205. Throat; 1206. Expansion angle; 1207. Nozzle; 13. Vortex tube; 14. T-junction collection pipe; 15. Coalescing filter element; 16. Output pipeline. Detailed Implementation

[0025] Figures 1-2 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figures 1-2 The present invention will be further described below.

[0026] like Figure 1As shown, this utility model discloses an oil-gas separation and recovery device, including a Venturi injector 12, a high-pressure gas source, a cold air source, and a recovery assembly. The Venturi injector 12 is provided with an oil vapor inlet 1201, a high-pressure gas inlet 1202, a cold air inlet 1203, and an outlet 1204. In this embodiment, the Venturi injector is cross-shaped. The high-pressure gas inlet 1202 and the outlet 1204 are arranged opposite each other at both ends of the Venturi injector 12. The oil vapor inlet 1201 and the cold air inlet 1203 are located on the side of the throat 1205 near the high-pressure gas inlet 1202. Oil vapor, high-pressure gas, and cold air are separated into oil vapor, high-pressure gas, and cold air. Air is introduced into the Venturi ejector 12 through pipes. High-pressure air is introduced into the Venturi ejector 12. The high-pressure air can generate negative pressure through the throat 1205. After negative pressure is generated inside the Venturi ejector 12, oil vapor and cold air can be drawn in. The oil vapor and cold air exchange heat and cool down and undergo phase change inside the Venturi ejector 12. At the same time, small lubricating oil droplets can collide and agglomerate into large droplets inside the Venturi ejector 12. An output pipe 16 is connected to the output port 1204 of the Venturi ejector 12. The recovery component is set on the output pipe 16 to facilitate subsequent separation and recovery of lubricating oil.

[0027] like Figure 2 As shown, the diameter of the oil vapor inlet 1201 in the Venturi ejector 12 is 10~15mm, and the diameter of the throat 1205 is 9~13mm. In this embodiment, the diameter of the oil vapor inlet 1201 in the Venturi ejector 12 is 12.86mm, and the diameter of the throat 1205 is 11mm. The area between the throat 1205 and the outlet 1204 in the Venturi ejector 12 is a diffusion zone. The diameter of the throat 1205 is smaller than the diameter of the outlet 1204. The expansion angle 1206 of the diffusion zone is 10°~13°. In this embodiment, the expansion angle 1206 of the diffusion zone is 11.24°. Using the response surface methodology and numerical simulation design, the Venturi ejector 12 has the maximum power to draw lubricating oil vapor under these dimensions. In this embodiment, the diameter of the high-pressure air inlet 1202 and outlet 1204 of the Venturi injector 12 is 15 mm, the diameter of the nozzle 1207 is 5 mm, and the outer diameter of the Venturi injector 12 is 32 mm.

[0028] The lubricating oil is placed in the oil tank 1. Under high temperature, the lubricating oil in the oil tank 1 evaporates into oil vapor. An oil vapor delivery pipeline 2 is connected to the top of the oil tank 1. The oil vapor delivery pipeline 2 is connected to the oil vapor inlet 1201 of the Venturi injector 12. A pressure gauge 3 and a thermometer 4 are installed on the oil vapor delivery pipeline 2 in sequence to monitor the pressure and temperature of the oil vapor in real time. A valve 5 is also installed on the oil vapor delivery pipeline 2 to control whether the oil vapor is delivered.

[0029] In this embodiment, the high-pressure air source is an air compressor 8, and the cold air source is a vortex tube 13. The output end of the air compressor 8 is connected to a high-pressure air delivery pipeline 10. At the end of the high-pressure air delivery pipeline 10, a high-pressure delivery pipeline 6 and a cooling delivery pipeline 7 are connected via a tee. The high-pressure delivery pipeline 6 is connected to the high-pressure air inlet 1202 of the Venturi injector 12, and the cooling delivery pipeline 7 is connected to the vortex tube 13. Compressed air at a certain pressure is input into the vortex tube 13. Through energy conversion inside the vortex tube 13, cold air is generated at one end and hot air is generated at the other end. The cold air outlet end of the vortex tube 13 is connected to the cold air inlet 1203 of the Venturi injector 12. The air compressor 8 provides high-pressure air to both the Venturi injector 12 and the vortex tube 13 simultaneously.

[0030] A buffer tank 9 is connected to the output end of the air compressor 8. The buffer tank 9 can store a certain amount of compressed air to reduce pressure fluctuations and stabilize the pressure. In addition, the water content in the oil vapor is negligible, but the air compressor 8 will produce a certain amount of moisture. The buffer tank can also cool the air, separate condensate, and intercept impurities. Because the air compressor 8 does work on the air, the air will be heated. When the air compressor 8 is not doing work, the air entering the buffer tank 9 can be cooled to a certain extent. A valve 5 is installed on the high-pressure air delivery pipeline 10. Pressure gauges 3, thermometers 4, and valves 5 are also installed on the high-pressure delivery pipeline 6 and the cooling delivery pipeline 7. An air flow meter 11 is also installed on the high-pressure delivery pipeline 6. The air flow meter 11 can detect the intake volume of high-pressure air.

[0031] The recovery assembly in this embodiment includes at least a three-way collection pipe 14 and a filter element. The three-way collection pipe 14 is located near the Venturi injector 12, and its collection section is positioned below the output pipe 16. Condensed oil droplets can directly pass through the three-way collection pipe 14 and be collected when the output pipe 16 is exited. The filter element intercepts and collects small particles of condensed oil droplets, ensuring that clean air is discharged from the end of the output pipe 16. In this embodiment, the filter element is a coalescing filter element 15. The coalescing filter element 15 mainly uses physical and chemical adsorption to aggregate suspended particles and impurities in the liquid, forming larger particles. The coalescing filter element 15 is made of multiple layers of fiber material, forming a complex channel network. The fiber material has a high specific surface area, providing more adsorption sites to achieve deep filtration, ensuring the effectiveness and reliability of the filtration process. A TOVC (Total Air Quality Control) detector can be installed at the end of the output pipe 16 to detect air quality.

[0032] In use, the air compressor 8 delivers high-pressure gas to the Venturi injector 12 via the high-pressure delivery pipeline 6. After passing through the throat 1205, the high-pressure gas generates low pressure. Simultaneously, the air compressor 8 delivers high-pressure gas to the vortex tube 13 via the cooling delivery pipeline 7. The low pressure inside the Venturi injector 12 draws in oil vapor and cold air generated by the vortex tube 13. The oil vapor exchanges heat with the cold air inside the Venturi injector 12, causing the oil mist to condense. The condensed oil mist passes through the output pipeline 16, and the lubricating oil is directly collected in the three-way collection pipe 14. Small oil droplets are agglomerated into larger particles by the coalescing filter element 15 and then collected. This invention introduces cold air into the Venturi injector 12, drawing in oil vapor and cold air at low pressure. The oil vapor and cold air mix thoroughly at the throat, increasing the condensation phase change effect of the oil-gas mixture in the throat 1205 and subsequent pipelines.

[0033] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. An oil and gas separation and recovery device, characterized in that: The device includes a Venturi injector (12), a high-pressure gas source, a cold air source, and a recovery assembly. The Venturi injector (12) is provided with an oil vapor inlet (1201), a high-pressure gas inlet (1202), a cold air inlet (1203), and an outlet (1204). The high-pressure gas inlet (1202) and the outlet (1204) are arranged opposite to each other at both ends of the Venturi injector (12). The oil vapor inlet (1201) and the cold air inlet (1203) are arranged on the side of the throat pipe (1205) near the high-pressure gas inlet (1202). Oil vapor, high-pressure gas, and cold air are respectively introduced into the Venturi injector (12) through pipelines. An outlet pipeline (16) is connected to the outlet (1204) of the Venturi injector (12). The recovery assembly is arranged on the outlet pipeline (16).

2. The oil and gas separation and recovery device according to claim 1, characterized in that: The diameter of the oil vapor inlet (1201) of the Venturi injector (12) is 10~15mm, and the diameter of the throat (1205) is 9~13mm.

3. The oil and gas separation and recovery device according to claim 2, characterized in that: The diameter of the oil vapor inlet (1201) of the Venturi injector (12) is 12.86 mm, and the diameter of the throat (1205) is 11 mm.

4. The oil and gas separation and recovery device according to claim 1, characterized in that: In the Venturi injector (12), the area between the throat (1205) and the outlet (1204) is a diffusion zone. The diameter of the throat (1205) is smaller than the diameter of the outlet (1204), and the expansion angle (1206) of the diffusion zone is 10°~13°.

5. The oil and gas separation and recovery device according to claim 4, characterized in that: The expansion angle (1206) of the diffusion region is 11.24°.

6. The oil and gas separation and recovery device according to claim 1, characterized in that: The high-pressure air source is an air compressor (8), and the cold air source is a vortex tube (13). The output end of the air compressor (8) is connected to the high-pressure air inlet (1202) of the Venturi injector (12) through a high-pressure pipeline (6). The output end of the air compressor (8) is connected to the vortex tube (13) through a cooling pipeline (7). The cold air outlet end of the vortex tube (13) is connected to the cold air inlet (1203) of the Venturi injector (12).

7. The oil and gas separation and recovery device according to claim 6, characterized in that: A buffer tank (9) is connected to the output end of the air compressor (8).

8. The oil and gas separation and recovery device according to claim 1, characterized in that: The recycling assembly includes at least a three-way collection pipe (14) and a filter element. The three-way collection pipe (14) is located near the Venturi injector (12), and the collection part of the three-way collection pipe (14) is located on the lower side of the output pipe (16).

9. An oil and gas separation and recovery device according to claim 8, characterized in that: The filter element is a coalescing filter element (15).

10. An oil and gas separation and recovery device according to claim 1, characterized in that: Pressure gauge (3) and temperature gauge (4) are installed on each of the pipelines.

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