Oil and gas recovery processing device

Abstract

The utility model relates to oil gas recovery field discloses an oil gas recovery treatment device, including fuel oil tank, lean oil pump, absorption tower, rich oil pump and waste gas input pipeline, lean oil pump is connected in the export of oil tank and is connected in the fuel oil inlet of absorption tower, rich oil pump is connected in the fuel oil export of absorption tower and is connected the inlet of fuel oil tank, waste gas input pipeline is connected in the waste gas inlet of absorption tower, wherein, the inlet of lean oil pump still is connected with filling pump pipeline, filling pump pipeline is connected in the export of rich oil pump, and the flowmeter is provided between lean oil pump and absorption tower, and filling pump valve is provided on filling pump pipeline, and filling pump valve is arranged as opening to pass through rich oil filling pump when the flow of flowmeter is lower than predetermined flow, through above-mentioned technical scheme, can provide the flow required for lean oil pump to run through filling pump pipeline, avoids or reduces lean oil pump to appear and guarantees the long -term stable operation of oil gas recovery treatment device, reduces the number of downtime, improves the efficiency.

Description

Technical Field

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

[0002] Oil and gas recovery and treatment units are mainly used to treat exhaust gases from the loading of crude oil, 95# gasoline, ethylene feedstock, jet fuel, sec-butyl acetate, and other petroleum products and chemicals. Among them, the low-temperature diesel absorption technology utilizes the principle of similarity and compatibility between hydrocarbons in the exhaust gas and diesel fuel. The diesel fuel absorbs the hydrocarbons in the exhaust gas. The lean absorption oil comes from the fuel tank. After absorbing the hydrocarbons in the exhaust gas in the absorption tower, it becomes rich oil, which is then transported back to the fuel tank. The exhaust gas, after absorption, is discharged through the exhaust gas treatment process.

[0003] In this process, lean fuel from the fuel tank is pumped to the absorption tower via a lean fuel pump. A buffer tank is installed upstream of the lean fuel pump. Due to the long inlet pipeline of the lean fuel pump and the negative pressure at the pump inlet, when the lean fuel pump and the liquid ring compressor are running together, the pressure in the absorption tower reaches 50-180 kPa. After a period of operation, the lean fuel flow begins to interrupt. This is because, under pressure conditions, air dissolves in diesel fuel and begins to be slowly released in the fuel tank operating at atmospheric pressure. This air then gradually accumulates in the buffer tank at the inlet of the lean fuel pump, eventually causing the pump to cavitate. Utility Model Content

[0004] The purpose of this invention is to overcome the problem of flow interruption in existing lean oil pumps.

[0005] To achieve the above objectives, this utility model provides an oil and gas recovery and treatment device, comprising a fuel tank, a lean oil pump, an absorption tower, a rich oil pump, and an exhaust gas input pipeline. The lean oil pump is directly connected to the outlet of the fuel tank and to the fuel inlet of the absorption tower. The rich oil pump is connected to the fuel outlet of the absorption tower and to the inlet of the fuel tank. The exhaust gas input pipeline is connected to the exhaust gas inlet of the absorption tower. The inlet of the lean oil pump is also connected to a priming pipeline, which is connected to the outlet of the rich oil pump. A flow meter is installed between the lean oil pump and the absorption tower. A priming valve is installed on the priming pipeline, which is configured to open when the flow rate of the flow meter is lower than a predetermined flow rate to allow the rich oil priming pump to pass through.

[0006] In some embodiments, the system further includes a finished oil tank, and the rich oil pump and the finished oil tank are connected in parallel to the filling pump pipeline.

[0007] In some embodiments, the priming valve is configured such that: when the flow rate of the flow meter is less than 30% of the predetermined flow rate, the opening degree of the priming valve is 100%; when the flow rate of the flow meter is greater than or equal to 30% of the predetermined flow rate and less than 60% of the predetermined flow rate, the opening degree of the priming valve is 75%; and when the flow rate of the flow meter is less than the predetermined flow rate and greater than or equal to 60% of the predetermined flow rate, the opening degree of the priming valve is 50%.

[0008] In some embodiments, the priming valve and the flow meter are electrically connected to a controller, which can control the opening and closing and the degree of opening of the priming valve based on the flow information provided by the flow meter.

[0009] In some embodiments, a compressor for compressing exhaust gas is provided on the exhaust gas inlet pipe.

[0010] In some embodiments, the compressor is a liquid ring compressor, and the rich oil pump is connected to the fuel tank via the compressor.

[0011] In some embodiments, the exhaust gas outlet of the absorption tower is connected to an exhaust gas discharge pipeline, which is connected to an exhaust gas treatment device.

[0012] In some embodiments, the exhaust gas outlet and the fuel oil inlet are located at the upper part of the absorption tower, and the exhaust gas inlet and the fuel oil outlet are located at the lower part of the absorption tower.

[0013] In some embodiments, the waste gas treatment equipment includes a desulfurization reactor, a filter, and a catalytic oxidation reactor.

[0014] In some embodiments, a heat exchanger is provided between the lean oil pump and the absorption tower.

[0015] The above technical solution provides the required flow rate for the lean oil pump through the priming pipeline, avoiding or reducing flow interruptions in the lean oil pump, ensuring the long-term stable operation of the oil and gas recovery treatment unit, reducing downtime, and improving efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the oil and gas recovery and treatment device described in this embodiment.

[0017] Explanation of reference numerals in the attached figures

[0018] 1-Fuel tank, 2-Lean oil pump, 3-Rich oil pump, 4-Absorption tower, 5-Flow meter, 6-Filling pump pipeline, 7-Filling pump valve, 8-Finished oil tank, 9-Compressor, 10-Waste gas treatment equipment, 11-Waste gas inlet pipeline, 12-Waste gas outlet pipeline. Detailed Implementation

[0019] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0020] refer to Figure 1 As shown, this solution provides an oil and gas recovery and treatment device, characterized in that it includes a fuel tank 1, a lean oil pump 2, an absorption tower 4, a rich oil pump 3, and an exhaust gas input pipeline 11. The lean oil pump 2 is directly connected to the outlet of the fuel tank and to the fuel inlet of the absorption tower 4. The rich oil pump 3 is connected to the fuel outlet of the absorption tower 4 and to the inlet of the fuel tank 1. The exhaust gas input pipeline 11 is connected to the exhaust gas inlet of the absorption tower 4. The inlet of the lean oil pump 2 is also connected to a priming pipeline 6, which is connected to the outlet of the rich oil pump 3. A flow meter 5 is installed between the lean oil pump 2 and the absorption tower 4. A priming valve 7 is installed on the priming pipeline 6. The priming valve 7 is configured to open when the flow rate of the flow meter 5 is lower than a predetermined flow rate to allow the rich oil priming pump to pass through.

[0021] Fuel tank 1, lean fuel pump 2, absorption tower 4, and rich fuel pump 3 are sequentially connected to form a circulation pipeline, realizing the circulation of fuel in fuel tank 1. The fuel is then used in absorption tower 4 to absorb hydrocarbons from the exhaust gas, forming rich fuel. It is understood that the rich fuel returns to fuel tank 1 and mixes with the existing lean fuel. After a period of operation, the fuel in fuel tank 1 can be drained and new lean fuel injected. Fuel tank 1 can be installed underground to save surface space.

[0022] The exhaust gas inlet pipe 11 can transport the exhaust gas to be treated to the absorption tower 4 to mix with fuel oil.

[0023] The lean oil pump 2 is directly connected to the fuel tank 1, meaning that a buffer tank is no longer required. A flow meter 5 is installed on the pipeline between the lean oil pump 2 and the absorption tower 4 to measure the flow rate output by the lean oil pump 2 in real time.

[0024] The inlet of the priming pump pipeline 6 is connected to the rich oil pump 3, the outlet is connected to the lean oil pump 2, and a priming pump valve 7 is provided.

[0025] When the flow rate measured by the flow meter 5 is lower than the predetermined flow rate, the priming valve 7 can be opened to transfer a portion of the rich oil output from the rich oil pump 3 to the lean oil pump 2, supplementing the flow rate required by the lean oil pump 2 and ensuring that the lean oil pump 2 does not run out of flow.

[0026] The predetermined flow rate can be the minimum allowable flow rate for the normal operation of the lean oil pump 2. When the real-time flow rate is lower than the minimum allowable flow rate, the lean oil pump 2 is prone to flow interruption. Therefore, the priming pipeline 7 can be opened to supplement the flow. When the real-time flow rate of the lean oil pump 2 remains above the predetermined flow rate for a long period of time, the priming valve 7 can be closed and opened again when the real-time flow rate of the lean oil pump 2 falls below the predetermined flow rate again.

[0027] In this solution, the priming pipeline can provide the required flow rate for the lean oil pump to operate, avoiding or reducing the occurrence of flow interruptions in the lean oil pump, ensuring the long-term stable operation of the oil and gas recovery treatment unit, reducing the number of downtimes, and improving efficiency.

[0028] In some embodiments, the oil and gas recovery and treatment device further includes a finished oil tank 8, with the rich oil pump 3 and the finished oil tank 8 connected in parallel to the filling pump pipeline 6. The finished oil tank 8 can store oil that is the same type of fuel as the fuel oil tank 1. When the flow rate of the rich oil pump 3 is insufficient to supplement the flow rate demand of the lean oil pump 2, the finished oil in the finished oil tank 8 can provide flow supplementation for the lean oil pump 2. The finished oil tank 8 is a supplement to the rich oil pump 3.

[0029] In some embodiments, the priming valve 7 is configured such that: when the flow rate of the flow meter 5 is less than 30% of the predetermined flow rate, the opening degree of the priming valve 7 is 100%; when the flow rate of the flow meter 5 is greater than or equal to 30% of the predetermined flow rate and less than 60% of the predetermined flow rate, the opening degree of the priming valve 7 is 75%; and when the flow rate of the flow meter 5 is less than the predetermined flow rate and greater than or equal to 60% of the predetermined flow rate, the opening degree of the priming valve 7 is 50%. In other words, the opening degree of the priming valve 7 is set to different values ​​according to the real-time flow rate of the lean oil pump 2 to cope with different flow gaps. For example, the priming valve 7 can be controlled by the controller described above.

[0030] In some embodiments, the priming valve 7 and the flow meter 5 are electrically connected to a controller, which can control the opening and closing of the priming valve 7 and its opening degree based on the flow information provided by the flow meter 5. The controller can receive information from the flow meter 5 and control the priming valve 7 based on this information, such as opening or closing the priming valve 7 and controlling the opening degree of the priming valve 7.

[0031] In some embodiments, a compressor 9 for compressing the waste gas is installed on the waste gas inlet pipe 11. The compressor 9 can compress the waste gas to improve the absorption efficiency of the waste gas in the absorption tower 4.

[0032] In some embodiments, the compressor 9 is a liquid ring compressor, and the rich oil pump 3 is connected to the fuel tank 1 through the compressor 9. The rich oil output by the rich oil pump 3 can be used as the working fluid of the liquid ring compressor to provide hydraulic power for the operation of the compressor.

[0033] In addition, in some hosts, the exhaust outlet of the absorption tower 4 is connected to an exhaust gas discharge pipe 12, which is connected to the exhaust gas treatment equipment 10. Gas components in the absorption tower 4 that cannot be absorbed by the fuel oil are discharged through the exhaust outlet, and the discharged exhaust gas components are transported to the exhaust gas treatment equipment 10 through the exhaust gas discharge pipe 12 for treatment, so that the treated exhaust gas meets emission standards.

[0034] In some embodiments, the exhaust gas outlet and the fuel oil inlet are located at the upper part of the absorption tower 4, while the exhaust gas inlet and the fuel oil outlet are located at the lower part of the absorption tower 4. That is, the exhaust gas flows upwards in the absorption tower 4, while the fuel oil flows downwards. The fuel oil and exhaust gas collide with each other, achieving the absorption of hydrocarbons in the exhaust gas.

[0035] In some embodiments, the waste gas treatment equipment 10 includes a desulfurization reactor, a filter, and a catalytic oxidation reactor. The desulfurization reactor can desulfurize the waste gas, the filter can remove solid particulate matter, and the catalytic oxidation reactor can use the catalytic action of a catalyst to oxidize the waste gas with oxygen in the air to produce water and carbon dioxide.

[0036] Additionally, in some embodiments, a heat exchanger is provided between the lean oil pump 2 and the absorption tower 4. The heat exchanger (not shown in the figure) can lower the temperature of the lean oil to absorb hydrocarbon components in the exhaust gas through the low-temperature fuel oil in the absorption tower.

[0037] Among them, the lean fuel in fuel tank 1 can be diesel (or gasoline), and the finished fuel tank 8 contains the corresponding finished diesel (or gasoline).

[0038] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. An oil and gas recovery and treatment device, characterized in that, The system includes a fuel tank (1), a lean fuel pump (2), an absorption tower (4), a rich fuel pump (3), and an exhaust gas inlet pipe (11). The lean fuel pump (2) is directly connected to the outlet of the fuel tank and to the fuel inlet of the absorption tower (4). The rich fuel pump (3) is connected to the fuel outlet of the absorption tower (4) and to the inlet of the fuel tank (1). The exhaust gas inlet pipe (11) is connected to the exhaust gas inlet of the absorption tower (4). The inlet of the lean fuel pump (2) is also connected to a filling pump pipe (6). The filling pump pipe (6) is connected to the outlet of the rich fuel pump (3). A flow meter (5) is installed between the lean fuel pump (2) and the absorption tower (4). A filling pump valve (7) is installed on the filling pump pipe (6). The filling pump valve (7) is configured to open when the flow rate of the flow meter (5) is lower than a predetermined flow rate to allow the rich fuel filling pump to pass through.

2. The oil and gas recovery and treatment device according to claim 1, characterized in that, It also includes a finished oil tank (8), and the rich oil pump (3) and the finished oil tank (8) are connected in parallel to the filling pump pipeline (6).

3. The oil and gas recovery and treatment device according to claim 1, characterized in that, The priming valve (7) is configured such that: when the flow rate of the flow meter (5) is less than 30% of the predetermined flow rate, the opening degree of the priming valve (7) is 100%; when the flow rate of the flow meter (5) is greater than or equal to 30% of the predetermined flow rate and less than 60% of the predetermined flow rate, the opening degree of the priming valve (7) is 75%; and when the flow rate of the flow meter (5) is less than the predetermined flow rate and greater than or equal to 60% of the predetermined flow rate, the opening degree of the priming valve (7) is 50%.

4. The oil and gas recovery and treatment device according to claim 3, characterized in that, The priming valve (7) and the flow meter (5) are electrically connected to the controller, which can control the opening and closing and the degree of opening of the priming valve (7) according to the flow information provided by the flow meter (5).

5. The oil and gas recovery and treatment device according to claim 1, characterized in that, A compressor (9) for compressing exhaust gas is installed on the exhaust gas inlet pipe (11).

6. The oil and gas recovery and treatment device according to claim 5, characterized in that, The compressor (9) is a liquid ring compressor, and the rich oil pump (3) is connected to the fuel tank (1) through the compressor (9).

7. The oil and gas recovery and treatment device according to claim 1, characterized in that, The exhaust outlet of the absorption tower (4) is connected to an exhaust gas discharge pipe (12), which is connected to the exhaust gas treatment equipment (10).

8. The oil and gas recovery and treatment device according to claim 7, characterized in that, The exhaust gas outlet and the fuel oil inlet are located at the upper part of the absorption tower (4), and the exhaust gas inlet and the fuel oil outlet are located at the lower part of the absorption tower (4).

9. The oil and gas recovery and treatment device according to claim 7, characterized in that, The waste gas treatment equipment (10) includes a desulfurization reactor, a filter, and a catalytic oxidation reactor.

10. The oil and gas recovery and treatment device according to claim 1, characterized in that, A heat exchanger is provided between the lean oil pump (2) and the absorption tower (4).

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