Membrane separation oil and gas recovery device

Abstract

The utility model relates to a kind of membrane separation oil gas recovery device, belong to oil gas recovery technical field, including underground storage tank, oil gas treatment mechanism and recovery mechanism installed in the outside of underground storage tank, oil gas treatment mechanism includes the first membrane module, second membrane module and third membrane module being arranged in the outside of underground storage tank, fixedly arranged connecting pipe between the first membrane module, second membrane module and third membrane module;The utility model passes through the selective permeability of macromolecule permeable membrane in oil gas treatment mechanism, so that the organic molecules in oil gas of underground storage tank pass through permeable membrane, and under the pressure difference effect established by vacuum pump suction in recovery mechanism, permeate to the other side of membrane, to reach the purpose of gas separation, and high concentration organic gas formed in permeation side is extracted back to underground storage tank by vacuum pump to carry out next cycle, to recover oil gas by the way of membrane separation, to reduce the consumption and waste of finished oil, and not easy to cause air pollution.

Description

Technical Field

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

[0002] Oil is a general term for hydrophobic substances that are liquid at room temperature, composed of one or more liquid hydrocarbons (silicone oil is largely composed of silicon oxides). Refined oil products (gasoline, diesel, kerosene, etc.) or chemical products contain a large number of volatile components (called oil vapors). During storage and other processes, these volatile components can evaporate and leak out.

[0003] The volatile oil and gas mainly contain toxic and harmful organic components such as ethane, propane, butane, pentane, heptane, octane, and benzene compounds. These flammable organic gases dispersed in the air will cause air pollution, harm human health, and are extremely prone to fire and explosion accidents, posing safety hazards. In addition, the volatile oil and gas will increase the consumption and waste of refined oil. Therefore, this application proposes a membrane separation oil and gas recovery device. Utility Model Content

[0004] The purpose of this invention is to provide a membrane separation oil and gas recovery device to solve the above-mentioned problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A membrane separation oil and gas recovery device includes an underground storage tank, an oil and gas processing mechanism and a recovery mechanism installed on the outside of the underground storage tank. The oil and gas processing mechanism includes a primary membrane module, a secondary membrane module and a tertiary membrane module installed on the outside of the underground storage tank. A connecting pipe is fixedly provided between the primary membrane module, the secondary membrane module and the tertiary membrane module. An air inlet pipe is fixedly provided between the top of the underground storage tank and one end of the primary membrane module.

[0007] The recovery mechanism includes a return pipe fixedly installed between one end of the primary membrane module, the secondary membrane module, and the tertiary membrane module, and a vacuum pump installed inside the return pipe. The bottom end of the return pipe is fixedly connected to the top of the underground storage tank. An exhaust pipe is fixedly installed on the top of the tertiary membrane module. The oil and gas processing mechanism is equipped with a quick-release mechanism.

[0008] As a further optimization of this utility model, an oil tank pressure gauge is provided inside the air inlet pipe, an exhaust pump, an exhaust valve and an emission concentration detector are fixedly provided inside the exhaust pipe, and an exhaust port is provided at the top of the exhaust pipe.

[0009] As a further optimization of this utility model, the primary membrane module, the secondary membrane module and the tertiary membrane module all include a shell and a polymer permeable membrane disposed inside the shell.

[0010] As a further optimization of this utility model, a matching top cover is movably provided in the notch opened at the top of the outer shell, and the polymer permeable membrane is fixedly installed at the bottom of the top cover.

[0011] As a further optimization of this utility model, the quick-release mechanism includes two sets of fixing rings movably disposed on the outer wall of the matching outer shell, and a bidirectional screw rotatably disposed on the bottom of the outer shell. The two sets of fixing rings respectively cooperate to abut against the outer walls of both ends of the top cover, and the two sets of fixing rings are respectively threaded onto the outer walls of both ends of the bidirectional screw. A bolt head is fixedly provided at one end of the bidirectional screw.

[0012] As a further optimization of this utility model, two sets of trapezoidal blocks are fixedly provided on both sides of the top of the top cover, and a guide groove for inserting the trapezoidal blocks is provided on the top of the inner side of the fixing ring.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. By utilizing the selective permeability of the polymer permeation membrane within the oil and gas processing unit, organic molecules in the oil and gas from the underground storage tank dissolve on the membrane surface as they pass through. Under the pressure difference established by the vacuum pump within the recovery unit, the gases permeate to the other side of the membrane, achieving gas separation. The high-concentration organic gas formed on the permeation side is then pumped back to the underground storage tank for the next cycle. This membrane separation method recovers oil and gas, reducing the consumption and waste of refined oil products and minimizing air pollution.

[0015] 2. Rotating the bolt head drives the bidirectional lead screw to rotate, allowing the two fixing rings to move laterally closer or further apart. When the two fixing rings move further apart, they can detach from the top cover, making it easy for workers to lift the top cover and quickly remove and disassemble the polymer permeation membrane from the outer shell. This facilitates cleaning or replacement of the polymer permeation membrane. When disassembling the polymer permeation membrane, it is not necessary to remove the outer shell from between several connecting pipes, making it more convenient. Furthermore, when installing the polymer permeation membrane, the pressure of the fixing rings on the trapezoidal block, combined with the guidance of the guide groove, can tightly press the top cover onto the outer shell, thereby improving the stability of the top cover and other components after installation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of a partial connection between the top cover and the outer shell of this utility model;

[0018] Figure 3 This is a schematic diagram showing the connection between the top cover and the polymer permeable membrane of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the fixing ring of this utility model.

[0020] In the diagram: 1. Underground storage tank; 11. Air inlet pipe; 12. Oil tank pressure gauge; 2. Primary membrane module; 21. Secondary membrane module; 22. Tertiary membrane module; 3. Return pipe; 31. Vacuum pump; 4. Exhaust pipe; 41. Exhaust pump; 42. Exhaust valve; 43. Emission concentration detector; 44. Emission port; 5. Outer shell; 51. Top cover; 52. Polymer permeable membrane; 53. Fixing ring; 54. Two-way lead screw; 55. Bolt head; 56. Trapezoidal block. Detailed Implementation

[0021] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0022] Example

[0023] like Figure 1-4 As shown, a membrane separation oil and gas recovery device includes an underground storage tank 1, an oil and gas processing unit and a recovery unit. The oil and gas processing unit and the recovery unit are installed on the outside of the underground storage tank 1. The oil and gas processing unit and the recovery unit can be located in a work cabinet on the ground. The underground storage tank 1 is buried underground in places such as gas stations.

[0024] like Figure 1 As shown, the oil and gas processing unit and the recovery unit are installed on the outside of the underground storage tank 1. The oil and gas processing unit includes a primary membrane module 2, a secondary membrane module 21, and a tertiary membrane module 22 located on the outside of the underground storage tank 1. A connecting pipe is fixedly installed between the primary membrane module 2, the secondary membrane module 21, and the tertiary membrane module 22. An air inlet pipe 11 is fixedly installed between the top of the underground storage tank 1 and one end of the primary membrane module 2. The recovery unit includes a return pipe 3 fixedly installed between one end of the primary membrane module 2, the secondary membrane module 21, and the tertiary membrane module 22, and a vacuum pump 31 installed in the return pipe 3. The bottom end of the return pipe 3 is fixedly connected to the top of the underground storage tank 1. The connecting pipe can connect the primary membrane module 2, the secondary membrane module 21, and the tertiary membrane module 22. The primary membrane module 2, the secondary membrane module 21, and the tertiary membrane module 22 can perform multiple processing of oil and gas.

[0025] like Figure 1-3 As shown, the primary membrane module 2, the secondary membrane module 21, and the tertiary membrane module 22 all include a housing 5 and a polymer permeable membrane 52 disposed inside the housing 5. The inlet pipe 11, the connecting pipe, and the return pipe 3 are all fixedly connected to the housing 5 of the primary membrane module 2, the secondary membrane module 21, and the tertiary membrane module 22.

[0026] The oil and gas recovery device will be activated when oil is unloaded or the pressure exceeds the preset pressure value. Oil and gas enter the oil and gas treatment mechanism through the air inlet pipe 11. Utilizing the selective permeability of the polymer permeable membrane 52 in the primary membrane module 2, secondary membrane module 21, and tertiary membrane module 22, the organic molecules in the oil and gas will dissolve on the surface of the polymer permeable membrane 52 when it passes through it. Under the pressure difference established by the vacuum pump 31, the gas permeates to the other side of the polymer permeable membrane 52, thereby achieving the purpose of gas separation. The high concentration of organic gas formed on the permeable side will be pumped back to the underground storage tank 1 through the return pipe 3 by the vacuum pump 31 for the next cycle.

[0027] like Figure 1 As shown, an exhaust pipe 4 is fixedly installed on the top of the three-stage membrane module 22. An oil tank pressure gauge 12 is installed inside the air inlet pipe 11. An exhaust pump 41, an exhaust valve 42, and an emission concentration detector 43 are fixedly installed inside the exhaust pipe 4. An exhaust port 44 is provided at the top of the exhaust pipe 4. The oil tank pressure gauge 12 can detect the pressure of oil and gas in the underground storage tank 1. The clean gas after membrane separation will enter the exhaust pipe 4 from the three-stage membrane module 22, and after being detected by the emission concentration detector 43 and meeting the standards, it will be discharged through the exhaust port 44, thereby meeting the environmental protection control standards. The exhaust pump 41 can accelerate the emission of clean gas, and the exhaust valve 42 can control the opening and closing of the exhaust pipe 4.

[0028] like Figure 1-3 As shown, a matching top cover 51 is movably installed in the notch at the top of the outer shell 5. The polymer permeable membrane 52 is fixedly installed at the bottom of the top cover 51. The top cover 51 can fill and seal the notch at the top of the outer shell 5, and the top cover 51 can connect the outer shell 5 and the polymer permeable membrane 52. A sealing element can be provided between the notch of the outer shell 5 and the top cover 51.

[0029] like Figure 1 , Figure 2 and Figure 4 As shown, the oil and gas processing unit is equipped with a quick-release mechanism, which includes two sets of fixing rings 53 movably mounted on the outer wall of the matching housing 5, and a bidirectional lead screw 54 rotatably mounted on the bottom of the housing 5. The two sets of fixing rings 53 respectively abut against the outer walls of both ends of the top cover 51, and the two sets of fixing rings 53 are respectively threaded onto the outer walls of both ends of the bidirectional lead screw 54. A bolt head 55 is fixed at one end of the bidirectional lead screw 54, and a base frame is fixed at the bottom of the housing 5. The bidirectional lead screw 54 is rotatably mounted inside the bottom end of the base frame, and two circular rings are fixed on the outer wall of the bidirectional lead screw 54 respectively abut against the two sides of the base frame. The circular rings can limit the bidirectional lead screw 54, so that the bidirectional lead screw 54 can rotate on the base frame without disengaging. The connection structure of the base frame and the circular rings is a common existing structure, and will not be described in detail here.

[0030] Rotating the bolt head 55 can drive the bidirectional lead screw 54 to rotate, allowing the two fixing rings 53 to move laterally closer or further apart. When the two fixing rings 53 move further apart, they can detach from the top cover 51, making it easy for staff to lift the top cover 51 and quickly remove and disassemble the polymer permeation membrane 52 from the outer shell 5. This facilitates cleaning or replacement of the polymer permeation membrane 52. When disassembling the polymer permeation membrane 52, it is not necessary to remove the outer shell 5 from between several connecting pipes, making it more convenient.

[0031] like Figure 1 , Figure 2 and Figure 4 As shown, two sets of trapezoidal blocks 56 are fixed on both sides of the top of the top cover 51. The top of the inner side of the fixing ring 53 is provided with a guide groove for the trapezoidal blocks 56 to be inserted. When the two fixing rings 53 move closer to each other, they will abut against the top cover 51, thereby initially fixing the top cover 51 in the notch of the outer shell 5. The trapezoidal blocks 56 will enter the guide groove of the top cover 51 after it has moved. As the two fixing rings 53 continue to move, under the guidance of the guide groove and the inclined surface of the trapezoidal blocks 56, the two fixing rings 53 that move closer to each other will press down on the trapezoidal blocks 56, and press the top cover 51 tightly against the outer shell 5, thereby improving the stability of the top cover 51 and the polymer permeable membrane 52 and other components after installation.

[0032] It should be noted that, in use, this membrane separation oil and gas recovery device will be activated when oil is unloaded or the pressure exceeds the preset pressure value. Oil and gas enter the oil and gas treatment mechanism through the air inlet pipe 11. Utilizing the selective permeability of the polymer permeable membrane 52 in the first-stage membrane module 2, the second-stage membrane module 21, and the third-stage membrane module 22, the organic molecules in the oil and gas will dissolve on the surface of the polymer permeable membrane 52 when it passes through it. Under the pressure difference established by the vacuum pump 31, the molecules permeate to the other side of the polymer permeable membrane 52, thereby achieving the purpose of gas separation.

[0033] Furthermore, the high-concentration organic gas formed on the permeate side will be pumped back to the underground storage tank 1 through the return pipe 3 by the vacuum pump 31 for the next cycle. The clean gas after membrane separation will enter the exhaust pipe 4 from the third-stage membrane module 22, and after being detected by the emission concentration detector 43 and meeting the standards, it will be discharged through the emission port 44, thereby meeting the environmental protection control standards.

[0034] Furthermore, rotating the bolt head 55 can drive the bidirectional lead screw 54 to rotate, allowing the two fixing rings 53 to move laterally closer or further apart. When the two fixing rings 53 move further apart, they can detach from the top cover 51, making it easy for workers to lift the top cover 51 and quickly remove and disassemble the polymer permeation membrane 52 from the outer shell 5. This facilitates cleaning or replacement of the polymer permeation membrane 52. When disassembling the polymer permeation membrane 52, it is not necessary to remove the outer shell 5 from between several connecting pipes, making it more convenient.

[0035] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A membrane separation oil and gas recovery device, comprising an underground storage tank (1), an oil and gas processing mechanism and a recovery mechanism installed outside the underground storage tank (1), characterized in that: The oil and gas processing unit includes a primary membrane module (2), a secondary membrane module (21) and a tertiary membrane module (22) located outside the underground storage tank (1). A connecting pipe is fixedly provided between the primary membrane module (2), the secondary membrane module (21) and the tertiary membrane module (22). An air inlet pipe (11) is fixedly provided between the top of the underground storage tank (1) and one end of the primary membrane module (2). The recovery mechanism includes a return pipe (3) fixedly installed between one end of the primary membrane module (2), the secondary membrane module (21) and the tertiary membrane module (22), and a vacuum pump (31) installed in the return pipe (3). The bottom end of the return pipe (3) is fixedly connected to the top of the underground storage tank (1). The top of the tertiary membrane module (22) is fixedly provided with an exhaust pipe (4). The oil and gas processing mechanism is provided with a quick-release mechanism.

2. The membrane separation oil and gas recovery device according to claim 1, characterized in that: The air inlet pipe (11) is equipped with an oil tank pressure gauge (12), the exhaust pipe (4) is equipped with an exhaust pump (41), an exhaust valve (42) and an emission concentration detector (43), and the exhaust pipe (4) is equipped with an exhaust port (44) at the top.

3. The membrane separation oil and gas recovery device according to claim 1, characterized in that: The primary membrane module (2), secondary membrane module (21) and tertiary membrane module (22) each include a housing (5) and a polymer permeable membrane (52) disposed within the housing (5).

4. The membrane separation oil and gas recovery device according to claim 3, characterized in that: A matching top cover (51) is movably disposed within a notch at the top of the outer shell (5), and the polymer permeable membrane (52) is fixedly installed at the bottom of the top cover (51).

5. The membrane separation oil and gas recovery device according to claim 4, characterized in that: The quick-release mechanism includes two sets of fixing rings (53) movably mounted on the outer wall of the matching housing (5) and a bidirectional screw (54) rotatably mounted on the bottom of the housing (5). The two sets of fixing rings (53) respectively abut against the outer walls of both ends of the top cover (51). The two sets of fixing rings (53) are respectively threaded onto the outer walls of both ends of the bidirectional screw (54). A bolt head (55) is fixed at one end of the bidirectional screw (54).

6. The membrane separation oil and gas recovery device according to claim 5, characterized in that: Two sets of trapezoidal blocks (56) are fixed on both sides of the top of the top cover (51), and a guide groove for inserting the trapezoidal blocks (56) is opened on the top of the inner side of the fixing ring (53).

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