Adsorption condensation type oil gas recovery device

Abstract

The utility model relates to oil gas recovery technical field discloses an adsorption condensing type oil gas recovery device, include: underground storage tank, the outside extension of underground storage tank is connected with first pipeline and second pipeline, installs first pressure table and adsorption pump on the pipeline of first pipeline, and first pipeline branches and connects to the outside with first branch pipeline, installs first electromagnetic valve on first branch pipeline, and first branch pipeline connects to enter the inside of first carbon jar, the top of first carbon jar extends to the outside with first gas outlet pipe, installs second electromagnetic valve on first gas outlet pipe, and the top of first gas outlet pipe is connected with the discharge port, the utility model discloses through adsorption pump extraction underground storage tank oil gas, is handled to the activated carbon adsorption layer in carbon jar, and the clean gas is discharged after reaching the standard by concentration sensor monitoring, and when not reaching the standard, starts vacuum pump analysis, air condenser condensation recovery, realizes oil gas high recovery rate and reaches the standard discharge, satisfies environmental protection requirement.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas recovery, and in particular to an adsorption-condensation type oil and gas recovery device. Background Technology

[0002] In the petrochemical and gas station industries, oil and gas volatilization is a significant source of volatile organic compound (VOC) emissions. Oil and gas recovery technology collects and treats oil and gas volatilized during storage tanks and loading processes, reducing resource waste and environmental pollution risks, thus aligning with national environmental policies and sustainable development requirements. Currently, adsorption and condensation are two common oil and gas recovery technologies.

[0003] Traditional carbon canister sealing materials (such as ordinary rubber seals) are prone to swelling and aging when exposed to gasoline vapors for extended periods, especially in high-temperature environments during summer, where the seals lose elasticity and fail. Based on this, we propose an adsorption-condensation type oil and gas recovery device. Utility Model Content

[0004] To address the technical problem of sealing failure of carbon canister sealing materials, this utility model provides an adsorption-condensation type oil and gas recovery device.

[0005] This utility model is achieved using the following technical solution: an adsorption-condensation type oil and gas recovery device, comprising: an underground storage tank, a first pipe and a second pipe extending outward from the outer side of the underground storage tank, a first pressure gauge and an adsorption pump installed on the first pipe, a first branch pipe branching outward from the first pipe, a first solenoid valve installed on the first branch pipe, and the first branch pipe connecting to the interior of a first carbon canister; a first vent pipe extending outward from the top of the first carbon canister, a second solenoid valve installed on the first vent pipe, a discharge port connected to the top of the first vent pipe, and a concentration sensor installed at the outlet of the first vent pipe at the discharge port.

[0006] A second pressure gauge is installed on the second pipeline, and a condenser and a vacuum pump are fixedly installed on the second pipeline; both the adsorption pump and the vacuum pump are explosion-proof pump bodies, and the rated flow rate of the adsorption pump is greater than that of the vacuum pump.

[0007] The second pipe branches outward to form a second branch pipe, on which a third solenoid valve is installed. The top of the second branch pipe connects to the first carbon canister. The outer side of the second pipe is connected to a main pipe, on which a fourth solenoid valve is installed. The top of the main pipe is connected to the second carbon canister, and the top of the second carbon canister extends to form an outlet pipe, on which a fifth solenoid valve is installed. The outlet pipe connects to the first exhaust pipe.

[0008] The first and second carbon canisters are equipped with sealing sleeves, which are fixedly fitted onto the surface of the carbon canisters. A lower ear plate is fixedly installed on the outer side of the sealing sleeve, and a threaded rod passes through the inner thread of the lower ear plate. A rubber gasket overlaps the top of the sealing sleeve, and a carbon canister cover is installed above the rubber gasket. An upper ear plate is fixedly connected to the outer side of the carbon canister cover, and a threaded opening is opened on the surface of the upper ear plate. The threaded rod is threadedly sealed to the threaded opening.

[0009] As a further optimization of this utility model, when the pressure inside the underground storage tank exceeds a preset value, the control system starts the adsorption pump to extract oil and gas from the storage tank through the first pipeline. The first pressure gauge on the first pipeline monitors the pipeline pressure in real time to ensure that the system operates within a safe pressure range.

[0010] As a further optimization of this utility model, oil and gas enter the first carbon canister through the first branch pipe, where the activated carbon adsorption layer inside adsorbs volatile organic compounds (VOCs) in the oil and gas. The clean gas flows to the discharge port through the first outlet pipe, and the gas concentration is detected by a concentration sensor along the way: if the concentration meets the standard, the second solenoid valve remains open, and the gas is directly discharged; if the concentration exceeds the standard, the control system determines that the adsorbent is close to saturation and enters the desorption and condensation stage.

[0011] As a further optimization of this invention, the control system closes the first solenoid valve to stop oil and gas from entering the first carbon canister, and simultaneously starts the vacuum pump. The vacuum pump performs vacuum desorption on the activated carbon adsorption layer in the first carbon canister through the second pipeline, releasing the adsorbed oil and gas molecules. The second pressure gauge on the second pipeline monitors the vacuum pressure in real time to ensure desorption efficiency.

[0012] As a further optimization of this utility model, the high-concentration oil and gas extracted enters the second pipeline through the second branch pipeline, and is cooled and condensed after contacting the air condenser. The liquid oil flows back to the underground storage tank through the pipeline, and the uncondensed gas enters the subsequent processing flow.

[0013] As a further optimization of this invention, when the processing efficiency of a single carbon canister is insufficient, the control system activates the fourth solenoid valve, allowing oil and gas to enter the second carbon canister through the main pipe. The activated carbon adsorption layer in the second carbon canister simultaneously performs adsorption, thereby improving the overall processing capacity.

[0014] As a further optimization of this utility model, when the first carbon tank is in the desorption and condensation stage, the second carbon tank can continue to operate the adsorption process independently. It is connected to the first gas outlet pipe through the fifth solenoid valve to realize the alternating operation of the two carbon tanks and ensure the continuous operation of the system.

[0015] As a further optimization of this utility model, sealing components are installed on the top of both the first and second carbon canisters, which are connected to the upper ear plate by a threaded rod to prevent oil and gas leakage.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. This utility model extracts oil and gas from underground storage tanks using an adsorption pump, treats it through an activated carbon adsorption layer inside a carbon canister, and discharges the clean gas after it meets the standards as monitored by a concentration sensor. If the standards are not met, a vacuum pump is activated for desorption and a wind condenser is activated for condensation and recovery, thereby achieving a high oil and gas recovery rate and meeting emission standards, thus satisfying environmental protection requirements.

[0018] 2. This utility model allows for parallel adsorption or alternating regeneration using two carbon canisters: when a single carbon canister is insufficient, the solenoid valve is opened to enable both canisters to work synchronously; during single-canister desorption, the other canister operates independently, avoiding system downtime, improving processing efficiency, and adapting to continuous high-load conditions.

[0019] 3. This utility model utilizes a mechanical seal through a top sealing assembly for the carbon canister, combined with a threaded rod and upper ear plate, to significantly reduce the leakage rate at the carbon canister interface, adapt to pressure fluctuations, and improve sealing reliability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the connection structure of the sealing assembly of this utility model;

[0022] Figure 3 This utility model Figure 2 Diagram of the disassembly and assembly of the middle section structure;

[0023] Figure 4 This utility model Figure 3 Diagram showing the disassembly and assembly of the middle section.

[0024] Explanation of key symbols:

[0025] 1. Underground storage tank; 11. First pipeline; 12. First pressure gauge; 13. Adsorption pump; 14. First branch pipeline; 15. First solenoid valve; 3. First carbon canister; 18. First outlet pipe; 19. Second solenoid valve; 112. Discharge port; 111. Concentration sensor; 21. Second pipeline; 22. Second pressure gauge; 23. Air condenser; 24. Vacuum pump; 25. Second branch pipeline; 26. Third solenoid valve; 27. Main pipe; 28. Fourth solenoid valve; 4. Second carbon canister; 29. ​​Outlet pipe; 210. Fifth solenoid valve; 5. Sealing assembly; 54. Sealing sleeve; 56. Lower ear plate; 57. Threaded rod; 58. Rubber gasket; 59. Carbon canister cover; 511. Upper ear plate; 512. Threaded opening. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0027] Example 1:

[0028] Please combine Figure 1 This embodiment proposes an adsorption-condensation type oil and gas recovery device, including: an underground storage tank 1, with a first pipe 11 and a second pipe 21 extending from the outside of the underground storage tank 1. A first pressure gauge 12 and an adsorption pump 13 are installed on the first pipe 11. The first pipe 11 branches outward to a first branch pipe 14, with a first solenoid valve 15 installed on the first branch pipe 14. The first branch pipe 14 connects to the interior of a first carbon canister 3. A first vent pipe 18 extends outward from the top of the first carbon canister 3, with a second solenoid valve 19 installed on the first vent pipe 18. A discharge port 112 is connected to the top of the first vent pipe 18, and a concentration sensor 111 is installed at the outlet of the first vent pipe 18 at the discharge port 112.

[0029] Specifically, when the pressure inside the underground storage tank 1 exceeds a preset value, the control system starts the adsorption pump 13 to extract oil and gas from the storage tank through the first pipeline 11. The first pressure gauge 12 on the first pipeline 11 monitors the pipeline pressure in real time to ensure that the system operates within a safe pressure range.

[0030] Adsorption treatment: Oil and gas enter the first carbon tank 3 through the first branch pipe 14, where the activated carbon adsorption layer inside adsorbs the volatile organic compounds (VOCs) in the oil and gas. The clean gas flows to the discharge port 112 through the first outlet pipe 18, and the gas concentration is detected by the concentration sensor 111 along the way.

[0031] If the concentration meets the standard, the second solenoid valve 19 remains open, and the gas is directly discharged.

[0032] If the concentration exceeds the standard, the control system determines that the adsorbent is close to saturation and enters the desorption and condensation stage.

[0033] A second pressure gauge 22 is installed on the second pipe 21. A wind condenser 23 and a vacuum pump 24 are fixedly installed on the second pipe 21. Both the adsorption pump 13 and the vacuum pump 24 are explosion-proof pumps, and the rated flow rate of the adsorption pump 13 is greater than that of the vacuum pump 24.

[0034] The second pipe 21 branches outward to a second branch pipe 25, on which a third solenoid valve 26 is installed. The top end of the second branch pipe 25 is connected to the first carbon canister 3.

[0035] The outer side of the second pipe 21 is connected to the main pipe 27, the main pipe 27 is equipped with the fourth solenoid valve 28, the top of the main pipe 27 is connected to the second carbon canister 4, the top of the second carbon canister 4 extends to the outlet pipe 29, the outlet pipe 29 is equipped with the fifth solenoid valve 210, and the outlet pipe 29 is connected to the first vent pipe 18.

[0036] The specific technical solution involves vacuum desorption: the control system closes the first solenoid valve 15 to stop oil and gas from entering the first carbon canister 3, and simultaneously starts the vacuum pump 24. The vacuum pump 24 performs vacuum desorption on the activated carbon adsorption layer in the first carbon canister 3 through the second pipe 21, releasing the adsorbed oil and gas molecules. The second pressure gauge 22 on the second pipe 21 monitors the vacuum pressure in real time to ensure desorption efficiency.

[0037] Condensation and liquefaction: The high-concentration oil and gas extracted enters the second pipeline 21 through the second branch pipeline 25. After contacting the air condenser 23, it is cooled and condensed. The liquid oil flows back to the underground storage tank 1 through the pipeline, and the uncondensed gas enters the subsequent processing.

[0038] A more specific technical solution is the parallel adsorption mode: when the processing efficiency of a single carbon canister is insufficient, the control system opens the fourth solenoid valve 28, and the oil and gas enter the second carbon canister 4 through the main pipe 27. The activated carbon adsorption layer of the second carbon canister 4 performs adsorption simultaneously, improving the overall processing capacity.

[0039] Alternating regeneration mode: When the first carbon tank 3 is in the desorption and condensation stage, the second carbon tank 4 can continue to operate the adsorption process independently. It is connected to the first outlet pipe 18 through the fifth solenoid valve 210 to realize the alternating operation of the two carbon tanks and ensure the continuous operation of the system.

[0040] Example 2:

[0041] Please see Figures 2-4 Example 2 further proposes a sealing component 5, which seals the carbon canister. The sealing component 5 is installed on the first carbon canister 3 and the second carbon canister 4. The sealing component 5 includes a sealing sleeve 54, a lower ear plate 56 fixedly installed on the outer side of the sealing sleeve 54, a threaded rod 57 threaded through the inner side of the lower ear plate 56, a rubber gasket 58 overlapping the upper part of the sealing sleeve 54, a carbon canister cover 59 installed above the rubber gasket 58, an upper ear plate 511 fixedly connected to the outer side of the carbon canister cover 59, a threaded opening 512 on the surface of the upper ear plate 511, and the threaded rod 57 is threadedly sealed to the threaded opening 512.

[0042] In the specific technical solution, sealing components 5 are installed on the top of both the first carbon canister 3 and the second carbon canister 4, which are connected to the upper ear plate 511 by threaded rod 57 to prevent oil and gas leakage.

[0043] The adsorption-condensation oil and gas recovery device provided in this patent achieves adsorption, condensation recovery, and emission compliance of oil and gas through synergistic operation. The specific working principle is as follows:

[0044] I. Oil and Gas Adsorption Stage

[0045] Oil and gas extraction: When the pressure inside underground storage tank 1 exceeds a preset value, the control system starts the adsorption pump 13 to extract oil and gas from the storage tank through the first pipeline 11. The first pressure gauge 12 on the first pipeline 11 monitors the pipeline pressure in real time to ensure that the system operates within a safe pressure range.

[0046] Adsorption treatment: Oil and gas enter the first carbon tank 3 through the first branch pipe 14, where the activated carbon adsorption layer inside adsorbs the volatile organic compounds (VOCs) in the oil and gas. The clean gas flows to the discharge port 112 through the first outlet pipe 18, and the gas concentration is detected by the concentration sensor 111 along the way.

[0047] If the concentration meets the standard, the second solenoid valve 19 remains open, and the gas is directly discharged.

[0048] If the concentration exceeds the standard, the control system determines that the adsorbent is close to saturation and enters the desorption and condensation stage.

[0049] II. Adsorbent Desorption and Condensation Recovery Stage

[0050] Vacuum Desorption: The control system closes the first solenoid valve 15, stopping the flow of oil and gas into the first carbon canister 3, and simultaneously starts the vacuum pump 24. The vacuum pump 24 performs vacuum desorption on the activated carbon adsorption layer in the first carbon canister 3 through the second pipe 21, releasing the adsorbed oil and gas molecules. The second pressure gauge 22 on the second pipe 21 monitors the vacuum pressure in real time to ensure desorption efficiency.

[0051] Condensation and liquefaction: The high-concentration oil and gas extracted enters the second pipeline 21 through the second branch pipeline 25. After contacting the air condenser 23, it is cooled and condensed. The liquid oil flows back to the underground storage tank 1 through the pipeline, and the uncondensed gas enters the subsequent processing.

[0052] III. Dual Carbon Tank Cooperative Operation and Switching

[0053] Parallel adsorption mode: When the processing efficiency of a single carbon canister is insufficient, the control system opens the fourth solenoid valve 28, and the oil and gas enter the second carbon canister 4 through the main pipe 27. The activated carbon adsorption layer of the second carbon canister 4 performs adsorption simultaneously, improving the overall processing capacity.

[0054] Alternating regeneration mode: When the first carbon tank 3 is in the desorption and condensation stage, the second carbon tank 4 can continue to operate the adsorption process independently. It is connected to the first outlet pipe 18 through the fifth solenoid valve 210 to realize the alternating operation of the two carbon tanks and ensure the continuous operation of the system.

[0055] IV. Sealing and Safety Control

[0056] Carbon canister sealing assembly: The top of both the first carbon canister 3 and the second carbon canister 4 are equipped with sealing assemblies 5, which are connected to the upper ear plate 511 by threaded rod 57 to prevent oil and gas leakage.

[0057] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. An adsorption-condensation type oil and gas recovery device, characterized in that, include: An underground storage tank (1) is provided, with a first pipe (11) and a second pipe (21) extending to its outer side. A first pressure gauge (12) and an adsorption pump (13) are installed on the first pipe (11). A first branch pipe (14) is connected to the first branch pipe (14). A first solenoid valve (15) is installed on the first branch pipe (14). The first branch pipe (14) is connected to the interior of a first carbon canister (3). A first vent pipe (18) extends outward from the top of the first carbon canister (3). A second solenoid valve (19) is installed on the first vent pipe (18). A discharge port (112) is connected to the top of the first vent pipe (18). A concentration sensor (111) is installed at the outlet of the discharge port (112) of the first vent pipe (18).

2. The adsorption-condensation type oil and gas recovery device as described in claim 1, characterized in that, A second pressure gauge (22) is installed on the second pipe (21), and a wind condenser (23) and a vacuum pump (24) are fixedly installed on the second pipe (21); The second pipe (21) branches outward to connect to a second branch pipe (25), and a third solenoid valve (26) is installed on the second branch pipe (25). The top end of the second branch pipe (25) is connected to the first carbon canister (3).

3. The adsorption-condensation type oil and gas recovery device as described in claim 2, characterized in that, The outer side of the second pipe (21) is connected to a main pipe (27), a fourth solenoid valve (28) is installed on the main pipe (27), a second carbon canister (4) is connected to the top of the main pipe (27), an outlet pipe (29) is connected to the top of the second carbon canister (4), a fifth solenoid valve (210) is installed on the outlet pipe (29), and the outlet pipe (29) is connected to the first gas outlet pipe (18).

4. The adsorption-condensation type oil and gas recovery device as described in claim 2, characterized in that, Both the adsorption pump (13) and the vacuum pump (24) are explosion-proof pump bodies, and the rated flow rate of the adsorption pump (13) is greater than the rated flow rate of the vacuum pump (24).

5. The adsorption-condensation type oil and gas recovery device as described in claim 1, characterized in that, Both the first carbon canister (3) and the second carbon canister (4) are filled with activated carbon adsorption layers.

6. The adsorption-condensation type oil and gas recovery device as described in claim 1, characterized in that, A sealing assembly (5) is installed on the first carbon canister (3) and the second carbon canister (4). The sealing assembly (5) includes a sealing sleeve (54), which is fixedly fitted on the inner surface of the carbon canister. A lower ear plate (56) is fixedly installed on the outer side of the sealing sleeve (54). A threaded rod (57) is threaded through the inner side of the lower ear plate (56). A rubber gasket (58) overlaps the upper part of the sealing sleeve (54). A carbon canister cover (59) is installed above the rubber gasket (58). An upper ear plate (511) is fixedly connected to the outer side of the carbon canister cover (59). A threaded opening (512) is opened on the surface of the upper ear plate (511). The threaded rod (57) is threadedly sealed to the threaded opening (512).

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