An oil and gas recovery device with oil return from oil depot membrane separation

Abstract

The present invention relates to the technical field of oil and gas recovery, and specifically to an oil and gas recovery device for oil depot membrane separation with oil return, comprising a loading chassis, a compressed air intake assembly is arranged on the left side of the end of the loading chassis, a condensation assembly is arranged on the support frame, and a membrane separation assembly is arranged on the right side of the end of the loading chassis; gasoline gas first enters the compressor to increase the pressure of the oil and gas, and the pressurized oil and gas pass through the condensation assembly, so that the heavy component oil and gas are condensed into liquid gasoline and temporarily stored in a small oil storage tank, and the light component oil and gas are discharged, and the discharged light component oil and gas enter the membrane separation assembly, and the membrane separation assembly generates a pressure difference on both sides of the membrane under the action of a dry screw vacuum pump. Under the action of pressure, due to the different permeability factors of oil and air, the oil enters the inner side of the membrane, and the oil is directly returned to the underground oil storage tank through the dry screw vacuum pump, and the clean air excluded from the outside of the membrane is discharged into the atmosphere.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas recovery, in particular to an oil and gas recovery device for oil depot membrane separation and oil return. Background Art

[0002] The traditional activated carbon adsorption method oil and gas recovery device uses activated carbon with good adsorption capacity for oil and gas. Oil and gas are first adsorbed by activated carbon, and air is discharged to achieve the purpose of oil and gas separation. A set of oil depot oil and gas recovery device needs to be loaded with about 600 tons of activated carbon. Activated carbon generally loses its activity after 3 to 5 years of use and no longer has adsorption capacity. At this time, all the old activated carbon in the device needs to be replaced with new activated carbon. Because the activated carbon adsorbs oil and gas for a long time and then decomposes the oil and gas, a large amount of oil and gas remains in the activated carbon that is about to lose its activity and cannot be completely decomposed. When replacing the activated carbon, the residual oil and gas will be lost, resulting in energy waste. On the other hand, it also brings safety hazards to the on-site replacement of activated carbon operations. In addition, the replaced activated carbon is flammable and explosive because of the residual oil and gas inside, and needs to be treated twice in a designated place. The treated activated carbon is fixed waste, which is called solid waste. That is, this oil and gas recovery method cannot fully meet the requirements of the environmental protection department at present.

[0003] In hot summer weather, it is difficult to effectively control the temperature of the activated carbon bed in the activated carbon adsorption oil and gas recovery device, which greatly reduces the adsorption capacity of the activated carbon and causes the risk of excessive emissions. This does not meet the requirements of the environmental protection department. Oil and gas emissions must meet the emission standards at all times. Therefore, an oil and gas recovery device with oil return from oil depot membrane separation is needed to improve the above problems. Summary of the invention

[0004] The object of the present invention is to provide an oil and gas recovery device for oil depot membrane separation with oil return, so as to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An oil and gas recovery device with oil return by membrane separation in an oil depot, comprising a loading chassis, a bearing frame is arranged in the middle of the end of the loading chassis, a support frame is arranged on the right side of the end of the loading chassis, a compressed air intake component is arranged on the left side of the end of the loading chassis, a condensation component is arranged on the bearing frame, and a membrane separation component is arranged on the right side of the end of the loading chassis;

[0007] The compressed air intake assembly includes a compressor and an explosion-proof axial flow fan. The compressor is arranged on the left side of the end of the loading chassis, and a matching three-phase asynchronous motor is installed on the front side of the compressor. The explosion-proof axial flow fan is arranged on the end of the loading chassis and on the rear side of the compressor. A first buffer tank is arranged on the end of the loading chassis and on the left side of the compressor, and a second buffer tank is arranged on the right side of the compressor. An air intake pipe is arranged on the end of the first buffer tank, a flame arrester is arranged at the front end of the air intake pipe, and a first pressure transmitter is arranged on the air intake pipe and on the rear side of the flame arrester.

[0008] The condensation assembly includes a first condensation tank, a second condensation tank, a third condensation tank and a small oil storage tank. The first condensation tank is arranged on the left side of the end of the carrier, the second condensation tank is arranged on the right side of the end of the carrier, the third condensation tank is arranged on the lower left side of the interior of the carrier, and the small oil storage tank is arranged on the lower right side of the interior of the carrier;

[0009] The membrane separation assembly includes a dry screw vacuum pump, a gas-liquid separation tank group and a separation membrane group. A dry screw vacuum pump is arranged on the right front side of the end of the loading chassis, a first vacuum tube is arranged on the rear side of the end of the dry screw vacuum pump, a second pressure transmitter is arranged on the first vacuum tube, a second vacuum tube is arranged on the front side of the end of the dry screw vacuum pump, a gas-liquid separation tank group is arranged at the end of the loading chassis and at the rear side of the dry screw vacuum pump, a separation tube is installed at the tail end of the gas-liquid separation tank group, a temperature transmitter is arranged on the separation tube, an electric ball valve is arranged on the separation tube and at the rear side of the temperature transmitter, a small electric actuator is installed on the electric ball valve, a separation membrane group is installed at one end of the separation tube, an exhaust pipe is arranged on the other side of the separation membrane group, an oil and gas concentration monitor is installed on the exhaust pipe, and an oil drain pipe is arranged on the front lower side of the gas-liquid separation tank group.

[0010] As a preferred solution of the present invention, an explosion-proof junction box is provided at the left rear side of the end of the loading chassis.

[0011] As a preferred solution of the present invention, the air inlet end of the compressor is adapted to be connected to the first buffer tank, the air outlet end of the compressor is adapted to be connected to the second buffer tank, and the second buffer tank is connected to the second condensing tank via a connecting pipe.

[0012] As a preferred solution of the present invention, the air intake pipe is connected to the first condensing tank through a connecting pipe, the front and rear ends of the first condensing tank and the second condensing tank are connected to the third condensing tank through a connecting pipe, and the third condensing tank is connected to a small oil storage tank through a transfer tube.

[0013] As a preferred solution of the present invention, the dry screw vacuum pump is connected to the first condensing tank through a first vacuum tube, and the upper end of the second vacuum tube is connected to the separation membrane group.

[0014] As a preferred solution of the present invention, the separation membrane group is arranged at the end of the support frame, and the exhaust pipe is also provided with an electric ball valve and a small electric actuator.

[0015] As a preferred solution of the present invention, the first buffer tank and the second buffer tank are connected to the oil drain pipe via a transfer tube, and a solenoid valve is provided on the transfer tube.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In the present invention, gasoline gas first enters the compressor to increase the pressure of the oil and gas. The pressurized oil and gas pass through the condensation component, so that the heavy component oil and gas are condensed into liquid gasoline and temporarily stored in a small oil storage tank. The light component oil and gas are discharged and enter the next circulation system. The discharged light component oil and gas enter the membrane separation component. The membrane separation component generates a pressure difference on both sides of the membrane under the action of a dry screw vacuum pump. Under the action of pressure, due to the different permeability factors of oil and air, the oil enters the inner side of the membrane, and the oil is directly returned to the underground oil storage tank through the dry screw vacuum pump, and the clean air excluded from the outside of the membrane is discharged into the atmosphere.

[0018] 2. In the present invention, the membrane separation process is relatively simple and has strong controllability; in terms of timeliness of treatment, the membrane separation method is to timely process and recover the generated oil and gas, and is more reliable in terms of safety; in terms of performance indicators, the membrane separation method has the advantages of high recovery rate and low emission concentration; in terms of environmental indicators, the membrane separation method is linear emission, and the emission is stable and controllable; in terms of whether there is residual oil and gas when replacing the adsorbent, absorbent or membrane component, when the membrane component is replaced, there is basically no residual oil and gas, and no waste of oil and gas is caused; in terms of the difficulty of operation when replacing the adsorbent, absorbent or membrane component, the membrane component is made of metal and is safe to replace on site High flexibility and strong replaceability; in terms of application, the membrane does not generate any solid waste after use, does not require secondary treatment, and has relatively low energy consumption. It will not cause a large amount of energy waste and indirect environmental pollution for the purpose of recovering oil and gas. Therefore, the membrane separation method is even closer to environmental protection requirements. When designing the structure of the device, various factors such as temperature, sparks, and static electricity that may ignite explosive mixtures are fully considered. Starting from limiting, controlling or preventing dangerous factors such as dangerous temperatures, sparks, and static electricity, a variety of explosion-proof measures are taken to ensure the safety of the use of the processing device, meeting the requirements of safety, explosion-proof and other standards for electrical products. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall left visual axis side structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the overall right visual axis side structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the structure of part of the left visual axis side of the present invention;

[0022] Figure 4 It is a schematic diagram of the partial right-viewing axis side structure of the present invention.

[0023] In the figure: 1, loading chassis; 101, explosion-proof junction box; 2, bearing frame; 3, support frame; 4, compressed air intake assembly; 401, compressor; 402, explosion-proof axial flow fan; 403, three-phase asynchronous motor; 404, first buffer tank; 405, second buffer tank; 406, air intake pipe; 407, flame arrester; 408, first pressure transmitter; 5, condensation assembly; 501, first condensation tank; 502, second condensation tank; 503, third Condensate tank; 504, small oil storage tank; 6, membrane separation assembly; 601, dry screw vacuum pump; 602, gas-liquid separation tank group; 603, separation membrane group; 604, first vacuum tube; 605, second pressure transmitter; 606, second vacuum tube; 607, separation tube; 608, temperature transmitter; 609, electric ball valve; 610, small electric actuator; 611, exhaust pipe; 612, oil and gas concentration monitor; 613, oil drain pipe. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] In order to facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings, in which several embodiments of the present invention are shown. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] Example: See Figure 1-4 The oil and gas recovery device with oil return by membrane separation in an oil depot shown in the figure comprises a loading chassis 1, a bearing frame 2 is arranged in the middle of the end of the loading chassis 1, a support frame 3 is arranged on the right side of the end of the loading chassis 1, a compressed air intake component 4 is arranged on the left side of the end of the loading chassis 1, a condensation component 5 is arranged on the bearing frame 2, and a membrane separation component 6 is arranged on the right side of the end of the loading chassis 1;

[0029] The compressed air intake assembly 4 includes a compressor 401 and an explosion-proof axial flow fan 402. The compressor 401 is arranged on the left side of the end of the loading chassis 1, and a matching three-phase asynchronous motor 403 is installed on the front side of the compressor 401. The explosion-proof axial flow fan 402 is arranged at the end of the loading chassis 1 and on the rear side of the compressor 401. A first buffer tank 404 is arranged at the end of the loading chassis 1 and on the left side of the compressor 401. A second buffer tank 405 is arranged on the right side of the compressor 401. An air intake pipe 406 is arranged at the end of the first buffer tank 404. A flame arrester 407 is arranged at the front end of the air intake pipe 406. A first pressure transmitter 408 is arranged on the air intake pipe 406 and on the rear side of the flame arrester 407.

[0030] The condensation assembly 5 includes a first condensation tank 501, a second condensation tank 502, a third condensation tank 503 and a small oil storage tank 504. The first condensation tank 501 is arranged on the left side of the end of the carrier frame 2, the second condensation tank 502 is arranged on the right side of the end of the carrier frame 2, the third condensation tank 503 is arranged on the lower left side of the interior of the carrier frame 2, and the small oil storage tank 504 is arranged on the lower right side of the interior of the carrier frame 2;

[0031] The membrane separation assembly 6 includes a dry screw vacuum pump 601, a gas-liquid separation tank group 602 and a separation membrane group 603. The dry screw vacuum pump 601 is arranged at the right front side of the end of the loading chassis 1, and a first vacuum tube 604 is arranged at the rear side of the end of the dry screw vacuum pump 601. A second pressure transmitter 605 is arranged on the first vacuum tube 604, and a second vacuum tube 606 is arranged at the front side of the end of the dry screw vacuum pump 601. The gas-liquid separation tank group 602 is arranged at the end of the loading chassis 1 and at the rear side of the dry screw vacuum pump 601. A separation tube 607 is installed at the tail end of the separation tank group 602, and a temperature transmitter 608 is arranged on the separation tube 607. An electric ball valve 609 is arranged on the separation tube 607 and at the rear side of the temperature transmitter 608. A small electric actuator 610 is installed on the electric ball valve 609. A separation membrane group 603 is installed at one end of the separation tube 607, and an exhaust pipe 611 is arranged on the other side of the separation membrane group 603. An oil and gas concentration monitor 612 is installed on the exhaust pipe 611. An oil drain pipe 613 is arranged on the front lower side of the gas-liquid separation tank group 602.

[0032] In this embodiment, an explosion-proof junction box 101 is provided at the left rear side of the end of the loading chassis 1, the air inlet end of the compressor 401 is adapted to be connected with the first buffer tank 404, the air outlet end of the compressor 401 is adapted to be connected with the second buffer tank 405, the second buffer tank 405 is connected with the second condensing tank 502 through a connecting pipe, the air inlet pipe 406 is connected with the first condensing tank 501 through a connecting pipe, the front and rear ends of the first condensing tank 501 and the second condensing tank 502 are connected with the third condensing tank 503 through a connecting pipe, the third condensing tank 503 is connected with the small oil storage tank 504 through a transfer pipe, the dry screw vacuum pump 601 is connected with the first condensing tank 501 through the first vacuum tube 604, the upper end of the second vacuum tube 606 is connected with the separation membrane group 603, the separation membrane group 603 is arranged at the end of the support frame 3, and the exhaust pipe 611 is also provided with an electric The moving ball valve 609 and the small electric actuator 610, the first buffer tank 404 and the second buffer tank 405 are connected to the oil drain pipe 613 through a transfer tube, and a solenoid valve is arranged on the transfer tube. The gasoline gas first enters the compressor 401 to increase the pressure of the oil and gas. The pressurized oil and gas pass through the condensation component 5, so that the heavy component oil and gas are condensed into liquid gasoline and temporarily stored in the small oil storage tank 504, and the light component oil and gas are discharged and enter the next circulation system. The discharged light component oil and gas enter the membrane separation component 6. The membrane separation component 6 generates a pressure difference on both sides of the membrane under the action of the dry screw vacuum pump 601. Under the action of pressure, due to the different permeability factors of oil and air, the oil enters the inner side of the membrane, and the oil is directly returned to the underground oil storage tank through the dry screw vacuum pump 601, and the clean air excluded from the outside of the membrane is discharged into the atmosphere.

[0033] Working principle: When in use, the pressure of the gas collecting pipe is monitored by configuring an instrument. When the system starting pressure reaches the set value (+150Pa), the system automatically starts, and the gasoline gas first enters the compressor 401 to increase the pressure of the oil and gas. The pressurized oil and gas pass through the condensation component 5, so that the heavy component oil and gas are condensed into liquid gasoline and temporarily stored in the small oil storage tank 504, and the light component oil and gas are discharged and enter the next circulation system. The discharged light component oil and gas enter the membrane separation component 6. The membrane separation component 6 generates pressure on both sides of the membrane under the action of the dry screw vacuum pump 601. Due to the difference in force, the oil enters the inner side of the membrane due to the different permeability factors of oil and air under the action of pressure, and the oil is directly returned to the underground oil storage tank through the dry screw vacuum pump 601, while the clean air excluded from the outer side of the membrane is discharged into the atmosphere. When the system stop pressure reaches the set value (0-50Pa), the system automatically shuts down; when the oil tank pressure reaches the system start pressure value again, the system is started again, and the system works in a cycle in sequence. The whole system adopts automatic control, without manual supervision, to achieve real-time oil and gas recovery. The membrane separation process is relatively simple and controllable. Strong; in terms of timeliness of treatment, the membrane separation method is to timely process and recover the generated oil and gas, and is more reliable in terms of safety; in terms of performance indicators, the membrane separation method has the advantages of high recovery rate and low emission concentration; in terms of environmental indicators, the membrane separation method is linear emission, and the emission is stable and controllable; in terms of whether there is oil and gas residue when replacing the adsorbent, absorbent or membrane component, when the membrane component is replaced, there is basically no oil and gas residue, and no waste of oil and gas is caused; in terms of the difficulty of operation when replacing the adsorbent, absorbent or membrane component, the membrane component is made of metal, and the on-site replacement is safe and easy to replace; in terms of application In fact, the membrane does not generate any solid waste after use, does not require secondary treatment, and has relatively low energy consumption. It will not cause a large amount of energy waste and indirect environmental pollution for the purpose of recovering oil and gas. Therefore, the membrane separation method is closer to environmental protection requirements. When designing the structure of the device, various factors such as temperature, sparks, static electricity, etc. that may ignite the explosive mixture are fully considered. Starting from limiting, controlling or preventing dangerous factors such as dangerous temperatures, sparks and static electricity, a variety of explosion-proof measures are taken to ensure the safety of the use of the processing equipment, and meet the requirements of safety, explosion-proof and other standards for electrical products.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oil and gas recovery device for oil depot membrane separation belt return oil, comprising a loading chassis (1), characterized in that: A bearing frame (2) is arranged in the middle of the end of the loading chassis (1), a support frame (3) is arranged on the right side of the end of the loading chassis (1), a compressed air intake assembly (4) is arranged on the left side of the end of the loading chassis (1), a condensation assembly (5) is arranged on the bearing frame (2), and a membrane separation assembly (6) is arranged on the right side of the end of the loading chassis (1); The compressed air intake assembly (4) comprises a compressor (401) and an explosion-proof axial flow fan (402); the compressor (401) is arranged on the left side of the end of the loading chassis (1); a matching three-phase asynchronous motor (403) is installed on the front side of the compressor (401); the explosion-proof axial flow fan (402) is arranged at the end of the loading chassis (1) and on the rear side of the compressor (401); a first buffer tank (404) is arranged at the end of the loading chassis (1) and on the left side of the compressor (401); a second buffer tank (405) is arranged on the right side of the compressor (401); an air intake pipe (406) is arranged at the end of the first buffer tank (404); a flame arrester (407) is arranged at the front end of the air intake pipe (406); and a first pressure transmitter (408) is arranged on the air intake pipe (406) and on the rear side of the flame arrester (407); The condensation assembly (5) comprises a first condensation tank (501), a second condensation tank (502), a third condensation tank (503) and a small oil storage tank (504); the first condensation tank (501) is arranged on the left side of the end of the support frame (2); the second condensation tank (502) is arranged on the right side of the end of the support frame (2); the third condensation tank (503) is arranged on the lower left side of the interior of the support frame (2); and the small oil storage tank (504) is arranged on the lower right side of the interior of the support frame (2); The membrane separation assembly (6) comprises a dry screw vacuum pump (601), a gas-liquid separation tank group (602) and a separation membrane group (603); the dry screw vacuum pump (601) is arranged at the right front side of the end of the loading chassis (1); a first vacuum tube (604) is arranged at the rear side of the end of the dry screw vacuum pump (601); a second pressure transmitter (605) is arranged on the first vacuum tube (604); a second vacuum tube (606) is arranged at the front side of the end of the dry screw vacuum pump (601); a gas-liquid separation tank group (602) is arranged at the end of the loading chassis (1) and located at the rear side of the dry screw vacuum pump (601); A separation tube (607) is installed at the tail end of the tank group (602), and a temperature transmitter (608) is arranged on the separation tube (607). An electric ball valve (609) is arranged on the separation tube (607) and located at the rear side of the temperature transmitter (608), and a small electric actuator (610) is installed on the electric ball valve (609). A separation membrane group (603) is installed at one end of the separation tube (607), and an exhaust pipe (611) is arranged on the other side of the separation membrane group (603). An oil and gas concentration monitor (612) is installed on the exhaust pipe (611), and an oil drain pipe (613) is arranged on the front lower side of the gas-liquid separation tank group (602); An explosion-proof junction box (101) is provided at the left rear side of the end of the loading chassis (1); The dry screw vacuum pump (601) is connected to the first condensation tank (501) via a first vacuum tube (604), and the upper end of the second vacuum tube (606) is connected to the separation membrane group (603).

2. The oil and gas recovery device for oil depot membrane separation with oil return according to claim 1 is characterized by: The air inlet end of the compressor (401) is adapted to be connected to the first buffer tank (404), and the air outlet end of the compressor (401) is adapted to be connected to the second buffer tank (405). The second buffer tank (405) is connected to the second condensing tank (502) via a connecting pipe.

3. The oil and gas recovery device for oil depot membrane separation with oil return according to claim 1 is characterized by: The air intake pipe (406) is connected to the first condensing tank (501) via a connecting pipe, the front and rear ends of the first condensing tank (501) and the second condensing tank (502) are connected to the third condensing tank (503) via a connecting pipe, and the third condensing tank (503) is connected to the small oil storage tank (504) via a transfer pipe.

4. The oil and gas recovery device for oil depot membrane separation with oil return according to claim 1 is characterized by: The separation membrane group (603) is arranged at the end of the support frame (3), and the exhaust pipe (611) is also provided with an electric ball valve (609) and a small electric actuator (610).

5. The oil and gas recovery device for oil depot membrane separation with oil return according to claim 1 is characterized by: The first buffer tank (404) and the second buffer tank (405) are connected to the oil drain pipe (613) via a transfer pipe, and a solenoid valve is provided on the transfer pipe.

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