Multi-process switching oil gas recovery device

Abstract

The utility model provides a multi-process switching oil gas recovery device, and relates to the technical field of petroleum recovery. A multi-process switching oil gas recovery device comprises an oil gas pipeline, an absorption tower and an adsorption unit, the oil gas pipeline comprises a main pipeline, a booster fan is arranged on the main pipeline, a monitoring unit is arranged between the booster fan and a gas inlet of the main pipeline, and the main pipeline is divided into a first branch, a second branch and a third branch. The first branch is communicated with a gas inlet of the absorption tower, the second branch is respectively communicated with a gas outlet of the absorption tower and a gas inlet of the adsorption unit, and the third branch is used for emptying oil gas; the oil inlet pipe is communicated with the oil inlet of the absorption tower, and the oil return pipe is communicated with the oil outlet of the absorption tower. Three oil-gas pipelines are arranged in the oil-gas recovery device, an oil-gas recovery process is selected according to working conditions, the stability of the device is improved, and the operation load of the device is reduced.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas recovery and treatment technology, and in particular to the field of oil and gas adsorption and absorption treatment technology, specifically referring to a multi-process switching oil and gas recovery device. Background Technology

[0002] During the storage and transportation of gasoline, a significant amount of oil and gas volatilization is unavoidable. This volatilization not only causes serious environmental pollution and endangers human health but also leads to resource waste. Current oil and gas recovery and treatment processes mainly include adsorption absorption, condensation absorption, and membrane separation absorption, with adsorption absorption being the mainstream and widely accepted method. However, because the emission of oil and gas during the recovery process is intermittent, the temperature, flow rate, and concentration of the oil and gas entering the recovery device fluctuate considerably. If the oil and gas recovery device is designed for maximum operating conditions, not only will the initial investment and energy consumption be high, but it will also result in substantial energy waste during the recovery process. Utility Model Content

[0003] The main objective of this invention is to provide a multi-process switching oil and gas recovery device. By judging the multivariable factors of the oil and gas recovery operating conditions, the device can autonomously switch the oil and gas recovery channels, solve the problem of variable oil and gas temperature, flow rate and concentration, improve the operational stability of the oil and gas recovery device and reduce the operating load of the oil and gas recovery device.

[0004] A multi-process switching oil and gas recovery device includes an oil and gas pipeline, an absorption tower, and an adsorption unit. The oil and gas pipeline includes a main pipeline with a booster fan installed on it. A monitoring unit is installed between the booster fan and the air inlet of the main pipeline. The main pipeline branches into a first branch, a second branch, and a third branch. The first branch is connected to the air inlet of the absorption tower, the second branch is connected to the exhaust port of the absorption tower and the air inlet of the adsorption unit, and the third branch is used for oil and gas venting. The absorption tower is equipped with an oil inlet pipe and an oil return pipe.

[0005] Furthermore, a first solenoid valve is installed at the upstream end of the first branch, a second solenoid valve is installed at the upstream end of the second branch, and a third solenoid valve is installed at the upstream end of the third branch.

[0006] Furthermore, an oil cooling unit for cooling the absorbed oil is installed on the oil inlet pipe.

[0007] Furthermore, a fifth solenoid valve is installed between the oil inlet of the oil inlet pipe and the oil cooling unit, near the input end of the oil cooling unit.

[0008] Furthermore, an oil inlet bypass is installed on the oil inlet pipe, which short-circuits the fifth solenoid valve and the oil cooling unit.

[0009] Furthermore, a fourth solenoid valve is installed on the oil inlet bypass.

[0010] Furthermore, the monitoring unit includes a monitoring module, a temperature monitor, a concentration monitor, and a flow monitor. The temperature monitor, concentration monitor, and flow monitor are arranged side by side on the main pipeline of the oil and gas pipeline. The monitoring module is used to receive and analyze the monitoring information from the temperature monitor, flow monitor, and concentration monitor.

[0011] Furthermore, the adsorption unit includes two adsorption tanks arranged in parallel, namely the first adsorption tank and the second adsorption tank. The air inlet of each adsorption tank is connected to the second branch through an air inlet shut-off valve, and the exhaust port of each adsorption tank is connected to the atmosphere through an exhaust shut-off valve.

[0012] Furthermore, a vacuum pump is installed on the connecting pipeline between the absorption tower and the adsorption unit, and the air inlets of the two adsorption tanks are each connected to the inlet of the vacuum pump through a vacuum shut-off valve.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model sets up three oil and gas recovery paths in the oil and gas recovery device. One path of oil and gas enters the absorption tower, another path of oil and gas bypasses the absorption tower and directly enters the adsorption tank, and the third path of oil and gas is directly discharged into the atmosphere. The oil and gas recovery path is selected according to the on / off state of the solenoid valve on the control pipeline under the operating conditions. This realizes the switching of oil and gas recovery process according to the operating conditions, improves the stability of the device operation, and reduces the operating load of the device.

[0015] 2. This utility model sets up a monitoring unit on the main pipeline of the oil and gas pipeline, and uses temperature monitor, concentration monitor and flow monitor to monitor the temperature, flow rate and concentration of the oil and gas entering the oil and gas recovery device in real time. The monitoring module controls the opening and closing state of the solenoid valve according to the concentration, flow rate and temperature of the oil and gas entering the pipeline, and selects the oil and gas recovery process. Attached Figure Description

[0016] 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. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] The reference numerals in the above figures are as follows:

[0019] 1. Oil and gas pipeline; 2. Absorption tower; 3. Adsorption unit; 4. Booster fan; 5. Monitoring unit; 6. Oil inlet pipe; 7. Oil return pipe; 11. First branch; 12. Second branch; 13. Third branch; 31. Adsorption tank; 32. Inlet shut-off valve; 33. Exhaust shut-off valve; 34. Vacuum shut-off valve; 35. Connecting pipeline; 36. Vacuum pump; 51. Monitoring module; 52. Temperature monitor; 53. Concentration monitor; 54. Flow monitor; 6 1. Oil inlet bypass; 62. Oil cooling unit; 63. Fourth solenoid valve; 64. Fifth solenoid valve; 111. First solenoid valve; 121. Second solenoid valve; 131. Third solenoid valve; 311. First adsorption tank; 312. Second adsorption tank; 321. First intake shut-off valve; 322. Second intake shut-off valve; 331. First exhaust shut-off valve; 332. Second exhaust shut-off valve; 341. First vacuum shut-off valve; 342. Second vacuum shut-off valve. Detailed Implementation

[0020] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0022] like Figure 1The multi-process switching oil and gas recovery device shown includes an oil and gas pipeline 1, an absorption tower 2, and an adsorption unit 3. The oil and gas pipeline 1 includes a main pipeline with a booster fan 4 installed on it. A monitoring unit 5 is installed between the booster fan 4 and the air inlet of the main pipeline. The main pipeline branches into a first branch 11, a second branch 12, and a third branch 13. The first branch 11 is connected to the air inlet of the absorption tower 2. The second branch 12 is connected to the exhaust port of the absorption tower 2 and the air inlet of the adsorption unit 3, respectively. The third branch 13 is used for oil and gas venting. The absorption tower 2 is equipped with an oil inlet pipe 6 and an oil return pipe 7. Three oil and gas recovery paths are set in the oil and gas recovery device, corresponding to the first branch 11, the second branch 12, and the third branch respectively. The oil and gas are introduced into the device through the booster fan 4 on the main pipeline of the oil and gas pipeline 1. The concentration, temperature and flow rate of the oil and gas entering the device are monitored in real time by the monitoring unit 5, which is the operating condition of the oil and gas recovery. This allows the device to select the oil and gas recovery path and switch the oil and gas recovery process according to the operating condition. When the oil and gas concentration, temperature, and flow rate are high, the oil and gas enter the device via the booster fan 4 and then directly enter the absorption tower 2 through the first branch 11. After being absorbed by the absorption tower 2, the oil and gas enters the adsorption unit 3 for further adsorption. After meeting the adsorption standards, the oil and gas is discharged into the atmosphere. The corresponding oil and gas recovery process under this condition is the low-temperature adsorption-absorption process. When the oil and gas concentration, temperature, and flow rate are low, the oil and gas bypass the absorption tower 2 through the second branch 12 and enter the adsorption unit 3 for adsorption. After being saturated with adsorption, the oil and gas is desorbed and enters the absorption tower 2 for oil and gas recovery. After meeting the adsorption standards, the oil and gas is discharged into the atmosphere. The corresponding oil and gas recovery process under this condition is the adsorption-absorption process. When the oil and gas enter the device via the booster fan 4, after testing, oil and gas that meet the emission standards are directly discharged into the atmosphere through the third branch 13.

[0023] Specifically, a first solenoid valve 111 is installed at the upstream end of the first branch 11, a second solenoid valve 121 is installed at the upstream end of the second branch 12, and a third solenoid valve 131 is installed at the upstream end of the third branch 13. The monitoring unit 5 analyzes the operating conditions of oil and gas recovery and controls the on / off state of the solenoid valves on the three branches according to the operating conditions, thereby controlling the path and process of oil and gas recovery.

[0024] Specifically, an oil cooler unit 62 for cooling the absorbed oil is installed on the oil inlet pipe 6. When the oil and gas temperature, concentration and flow rate are high, the oil and gas recovery process adopted is a low temperature absorption-adsorption process. Therefore, under this condition, the absorbed oil entering the absorption tower needs to be cooled by the oil cooler unit 62 before entering the absorption tower 2 for low temperature absorption of oil and gas.

[0025] Specifically, a fifth solenoid valve 64 is installed between the oil inlet of the oil inlet pipe 6 and the oil cooler unit 62, near the input end of the oil cooler unit 62.

[0026] Specifically, an oil inlet bypass 61 is provided on the oil inlet pipe 6, which short-circuits the fifth solenoid valve 64 and the oil cooling unit 62. When the concentration, temperature, and flow rate of the oil and gas are low, the oil and gas recovery process adopted is an adsorption-absorption process. At this time, the temperature of the absorption oil in the absorption tower 2 is at room temperature and does not require cooling. Therefore, under this condition, the absorption oil entering the absorption tower 2 needs to bypass the oil cooling unit 62 through the oil inlet bypass 61 for oil and gas absorption in the absorption tower 2.

[0027] Specifically, a fourth solenoid valve 63 is installed on the oil inlet bypass 61. The monitoring unit 5 controls the opening and closing states of the fourth solenoid valve 63 and the fifth solenoid valve 64 according to the operating conditions to select the path for the absorbed oil to enter the absorption tower 2, thereby controlling the switching of the oil and gas recovery process.

[0028] Specifically, monitoring unit 5 includes monitoring module 51, temperature monitor 51, flow monitor 52, and concentration monitor 53. Temperature monitor 52, concentration monitor 53, and flow monitor 54 are arranged in parallel on the main pipeline of oil and gas pipeline 1. Monitoring module 51 receives and analyzes the monitoring information from temperature monitor 52, concentration monitor 53, and flow monitor 54. Temperature monitor 51 contains a thermometer, and flow monitor 54 contains a flow meter. Temperature monitor 52, concentration monitor 53, and flow monitor 54 simultaneously detect relevant oil and gas information and analyze the monitoring information through monitoring module 51. Monitoring module 51 analyzes operating condition information and controls the opening and closing states of the solenoid valves in the oil and gas pipeline and inlet pipe according to the operating conditions, autonomously switching the oil and gas recovery path and recovery process.

[0029] Specifically, the adsorption unit 3 includes two adsorption tanks 31 arranged in parallel, namely the first adsorption tank 311 and the second adsorption tank 312. The air inlets of each adsorption tank 31 are connected to the second branch 12 via an air inlet shut-off valve 32, and the exhaust ports of each adsorption tank 31 are connected to the atmosphere via an exhaust shut-off valve 33. When oil and gas enter the adsorption unit 3 for adsorption, they first enter the first adsorption tank 311 for adsorption. After the first adsorption tank 311 is saturated, it then enters the second adsorption tank 312 for adsorption. After the oil and gas meet the adsorption standards in the adsorption tanks 31, the corresponding exhaust shut-off valve 32 of the adsorption tank 31 is opened, and the oil and gas are discharged into the atmosphere. In actual operation, the number of adsorption tanks 31 can be increased or decreased according to operational needs.

[0030] Specifically, a vacuum pump 36 is installed on the connecting pipeline 35 between the absorption tower 2 and the adsorption unit 3, and the air inlets of the two adsorption tanks 31 are each connected to the inlet of the vacuum pump 36 through a vacuum shut-off valve 34.

[0031] The specific operating state of the multi-process switching oil and gas recovery device provided by this utility model is as follows:

[0032] When the oil and gas concentration does not meet the emission standards, and the monitoring unit 5 detects that the temperature, flow rate and concentration of the oil and gas entering the device are high, the first solenoid valve 111 opens and the other valves close. The oil and gas enter the absorption tower 2 through the first branch 11. At this time, the fifth solenoid valve 64 opens and the absorption oil enters the oil cooling unit 62 through the oil inlet pipe 6. After being cooled by the oil cooling unit 62, the absorption oil enters the absorption tower 2 for oil and gas absorption. After the oil and gas in the absorption tower 2 are absorbed by the absorption oil, the unabsorbed oil and gas enter the adsorption tank 31 for adsorption. The oil and gas first enter the first adsorption tank 311 for adsorption. When the first adsorption tank 311 is saturated, the oil and gas enter the second adsorption tank 312 for adsorption. At this time, the first vacuum shut-off valve 341 is opened, the vacuum pump 36 is started, and the first adsorption tank 311 begins desorption. The oil and gas enter the absorption tower 2 through the connecting pipeline 35 for low-temperature absorption. After the oil and gas meet the standards after adsorption in the adsorption tank 31, they are discharged into the atmosphere. The absorption oil in the absorption tower 2 enters the oil storage tank through the return oil pipe 7 for storage. The oil and gas recovery process corresponding to this process is the low-temperature absorption-adsorption process.

[0033] When the oil and gas concentration does not meet the emission standards and the temperature, concentration, and flow rate of the oil and gas are low, the oil and gas enter the device via the booster fan 4, bypassing the absorption tower 2 and directly entering the adsorption tank 31. First, the second solenoid valve 121 and the first inlet shut-off valve 321 are opened, while the other valves are closed. The oil and gas bypass the absorption tower 2 through the second branch 12 and directly enter the first adsorption tank 311 for adsorption. When the first adsorption tank 311 is saturated, the second inlet shut-off valve 322 is opened, and the first inlet shut-off valve 321 is closed, allowing the oil and gas to enter the second adsorption tank 312 for adsorption. At this time, the first adsorption tank 311 begins desorption, the first vacuum shut-off valve 341 opens, the vacuum pump 36 starts, and the oil and gas saturated by the first adsorption tank 311 enters the absorption tower through the connecting pipeline 35. The fourth solenoid valve 63 opens, and the absorption oil bypasses the cooling oil unit 62 through the oil inlet bypass 61 and enters the absorption tower 2 to absorb the oil and gas. After being absorbed by the ambient temperature absorption oil, the gas re-enters the adsorption tank 31 for adsorption. After the oil and gas meet the standards after adsorption by the adsorption tank 31, it is discharged into the atmosphere. The absorption oil of the absorption tower enters the oil storage tank through the return oil pipe for storage. The corresponding oil and gas recovery process for this process is as follows:

[0034] When the oil and gas concentration meets the emission requirements or the device malfunctions, the third solenoid valve opens, and the oil and gas are directly discharged into the atmosphere through the third branch 13.

[0035] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A multi-process switching oil and gas recovery device, characterized in that, The system includes oil and gas pipelines, an absorption tower, and an adsorption unit. The oil and gas pipelines include a main pipeline with a booster fan installed on it. A monitoring unit is installed between the booster fan and the air inlet of the main pipeline. The main pipeline branches into a first branch, a second branch, and a third branch. The first branch is connected to the air inlet of the absorption tower, the second branch is connected to the exhaust port of the absorption tower and the air inlet of the adsorption unit, and the third branch is used for oil and gas venting. The absorption tower is equipped with an oil inlet pipe and an oil return pipe.

2. The multi-process switching oil and gas recovery device according to claim 1, characterized in that, A first solenoid valve is installed at the upstream end of the first branch, a second solenoid valve is installed at the upstream end of the second branch, and a third solenoid valve is installed at the upstream end of the third branch.

3. The multi-process switching oil and gas recovery device according to claim 1, characterized in that, An oil cooling unit for cooling the absorbed oil is installed on the oil inlet pipe.

4. The multi-process switching oil and gas recovery device according to claim 3, characterized in that, A fifth solenoid valve is installed between the oil inlet of the oil inlet pipe and the oil cooling unit, near the input end of the oil cooling unit.

5. A multi-process switching oil and gas recovery device according to claim 4, characterized in that, An oil inlet bypass is provided on the oil inlet pipe, which is short-circuited to the fifth solenoid valve and the oil cooling unit.

6. The multi-process switching oil and gas recovery device according to claim 5, characterized in that, A fourth solenoid valve is installed on the oil inlet bypass.

7. The multi-process switching oil and gas recovery device according to claim 1, characterized in that, The monitoring unit includes a monitoring module, a temperature monitor, a concentration monitor, and a flow monitor. The temperature monitor, concentration monitor, and flow monitor are arranged side by side on the main pipeline of the oil and gas pipeline. The monitoring module is used to receive and analyze the monitoring information from the temperature monitor, flow monitor, and concentration monitor.

8. A multi-process switching oil and gas recovery device according to claim 7, characterized in that, The adsorption unit includes two adsorption tanks arranged in parallel, namely the first adsorption tank and the second adsorption tank. The air inlet of each adsorption tank is connected to the second branch through an air inlet shut-off valve, and the exhaust port of each adsorption tank is connected to the atmosphere through an exhaust shut-off valve.

9. A multi-process switching oil and gas recovery device according to claim 8, characterized in that, A vacuum pump is installed on the connecting pipeline between the absorption tower and the adsorption unit, and the air inlets of the two adsorption tanks are each connected to the inlet of the vacuum pump through a vacuum shut-off valve.

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