CN219308251U - Oil gas recovery processing device - Google Patents

Abstract

The application provides an oil gas recovery processing device relates to oil gas recovery equipment technical field for when oil storage tank pressure risees and needs the pressure release, carry out recycle to exhaust oil gas, extension active carbon's life. The oil gas recovery processing device comprises a first air inlet pipe, a first filtering component, a second filtering component and a vacuum pump, wherein the first filtering component and the second filtering component are arranged in series. The first filter component can filter and separate oil gas discharged by the oil storage tank, and the purpose of reducing the concentration of the oil gas entering the carbon tank in the second filter component can be achieved. The oil gas recovery processing device that this application provided is arranged in prolonging the life of active carbon in the carbon tank.

Description

Oil gas recovery processing device

Technical Field

The application relates to the technical field of oil gas recovery equipment, in particular to an oil gas recovery processing device.

Background

Currently, there is a possibility that the pressure of the storage tank is continuously increased when the filling station performs the filling operation. When the tank pressure of the oil storage tank reaches a certain value, the oil storage tank needs to be decompressed. If the oil gas is directly discharged into the atmosphere, precious oil gas resources are wasted, and a certain degree of environmental pollution is caused. In order to avoid waste and pollution to the environment, the discharged oil gas needs to be recovered in the pressure relief process so that the discharged oil gas reaches the standard. At present, three oil gas recovery processes based on a carbon adsorption principle are adopted to convert oil gas into liquid oil and high-concentration oil gas for recycling.

However, the existing oil gas recovery process has the problem of short service life of the activated carbon.

Disclosure of Invention

In view of the above, embodiments of the present application provide an oil gas recovery processing device, which is used for recycling discharged oil gas when pressure of an oil storage tank rises and pressure needs to be released, so as to prolong the service life of activated carbon.

In order to achieve the above purpose, the embodiment of the present application provides the following technical solutions:

the embodiment of the application provides an oil gas recovery processing device, include:

a first air inlet pipe;

the first filter assembly comprises a membrane assembly, the membrane assembly comprises an air inlet, an air outlet and an air extraction opening, and the air inlet is connected with the first air inlet pipe;

the second filtering assembly comprises a carbon tank, a second air inlet pipe and a first air outlet pipe, wherein the carbon tank is respectively connected with the second air inlet pipe and the first air outlet pipe, the second air inlet pipe is connected with the air outlet, and the first air outlet pipe is communicated with the atmospheric environment;

and the air extracting opening of the vacuum pump is connected with the vacuum pump.

According to the oil gas recovery processing device, oil gas discharged from the oil storage tank can be filtered and separated through the first filtering component, the purpose of reducing the oil gas concentration entering the carbon tank can be achieved, the fact that the oil gas concentration entering the carbon tank is too high is avoided, and the service life of active carbon in the carbon tank is prolonged. Simultaneously, through setting up the second filter component and can carry out carbon adsorption to the oil gas that enters into the carbon tank to further reduce oil gas concentration, guaranteed to discharge the gas in the atmosphere and accord with national environmental protection standard, reduce environmental pollution.

In one possible embodiment, the membrane assembly further comprises a housing, a center tube, and a filtering membrane body. The air inlet and the shell are arranged. The housing is formed with an interior cavity. The central tube and the filtering membrane body are arranged in the inner cavity of the shell. The filter membrane body is coated on the outer surface of the central tube. One end of the central tube is provided with an extraction opening.

In one possible embodiment, the first filter assembly further comprises a first control valve, a second control valve, and a third control valve. The first control valve is arranged on the first air inlet pipe and is used for opening or closing the first air inlet pipe. The second control valve is arranged on the second air inlet pipe and is used for opening or closing the second air inlet pipe. The third control valve is arranged between the vacuum pump and the pumping hole.

In one possible embodiment, the first filter assembly further comprises a positive pressure gauge. The positive pressure meter is arranged on the first air inlet pipe. The first control valve is arranged between the positive pressure meter and the air inlet.

In one possible embodiment, the first filter assembly further comprises a first throttle valve. The first throttle valve is arranged on the second air inlet pipe. The first throttle valve is arranged between the second control valve and the exhaust port.

In one possible embodiment, the first control valve, the second control valve and the third control valve are all explosion-proof solenoid valves.

In a possible embodiment, the second filter assembly further comprises a fourth control valve and a fifth control valve. The fourth control valve is arranged on the first exhaust pipe and is used for opening or closing the first exhaust pipe. The fifth control valve is disposed between the vacuum pump and the carbon canister.

In one possible embodiment, the second filter assembly further comprises a concentration sensor. The concentration sensor is arranged between the carbon tank and the fourth control valve and is used for detecting the concentration value of oil gas discharged by the carbon tank.

In one possible embodiment, the oil and gas recovery processing device further comprises a purge assembly. The purge assembly includes a second throttle valve and a sixth control valve. The sixth control valve is connected to the carbon canister. The sixth control valve is arranged between the second throttle valve and the carbon tank.

In a possible embodiment, the oil and gas recovery processing device further comprises an oil return pipe. The vacuum pump is connected with the oil return pipe.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description will be given below of the drawings that are needed in the embodiments or the prior art descriptions, and it is obvious that the drawings in the following description are some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an oil gas recovery processing device according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural view of a membrane module according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of an oil gas recovery processing device according to an embodiment of the present application.

Reference numerals illustrate:

10. a first air inlet pipe;

20. a first filter assembly; 21. a membrane module; 21a, an air inlet; 21b, an exhaust port; 21c, an extraction opening; 211. a housing; 212. a central tube; 213. a filtering membrane body; 22. a first control valve; 23. a second control valve; 24. a third control valve; 25. a positive pressure gauge; 26. a first throttle valve;

30. a second filter assembly; 31. a carbon tank; 32. a second air inlet pipe; 33. a first exhaust pipe; 34. a fourth control valve; 35. a fifth control valve; 36. a concentration sensor;

40. a vacuum pump;

50. a purge assembly; 51. a second throttle valve; 52. a sixth control valve;

60. an oil return pipe;

70. a thermometer;

100. oil gas recovery processing device.

Detailed Description

Embodiments of the present application are described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the present application and are not intended to limit the scope of the application, i.e., the application is not limited to the embodiments described.

In the description of the present application, it is to be noted that, unless otherwise indicated, the meaning of "plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like indicate an orientation or positional relationship merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in the present application can be understood as appropriate by one of ordinary skill in the art.

As described in the background art, the carbon adsorption three-time oil gas recovery process in the related art has the problem of short service life of the activated carbon. The inventor researches and discovers that the reason for the problem is that in the process of three times of oil gas recovery through carbon adsorption, the oil gas is treated mainly by means of carbon adsorption through activated carbon. The adsorption capacity of the activated carbon in the initial state is relatively strong, and the adsorption effect on oil gas is good. However, as the concentration of oil gas becomes higher and higher, the adsorption capacity of the activated carbon gradually tends to be saturated, so that the effect of the activated carbon on oil gas filtration is gradually reduced, and the activated carbon needs to be replaced by new activated carbon, so that the service life of the activated carbon is shortened, and the number of times of replacing the activated carbon is increased.

To above-mentioned technical problem, this application embodiment provides an oil gas recovery processing device, including first filter element and the second filter element of series arrangement. The first filter component can filter and separate oil gas discharged from the oil storage tank, the purpose of reducing the concentration of the oil gas entering the carbon tank in the second filter component can be achieved, the condition that the concentration of the oil gas entering the carbon tank is too high is avoided, and therefore the service life of active carbon in the carbon tank is prolonged.

The oil and gas recovery processing device of the present application will be described below with reference to the embodiments shown in fig. 1 to 3.

Referring to fig. 1, an oil and gas recovery processing device 100 of the present application includes a first intake pipe 10, a first filter assembly 20, a second filter assembly 30, and a vacuum pump 40. The first filter assembly 20 includes a membrane assembly 21. The membrane module 21 includes an air inlet 21a, and an air extraction opening 21c. The intake port 21a is connected to the first intake pipe 10. The second filter assembly 30 includes a canister 31, a second inlet pipe 32, and a first outlet pipe 33. The canister 31 is connected to a second intake pipe 32 and a first exhaust pipe 33, respectively. The second intake pipe 32 is connected to the exhaust port 21 b. The first exhaust pipe 33 communicates with the atmosphere. The suction port 21c is connected to the vacuum pump 40.

When the tank pressure of the oil tank reaches a certain value and pressure relief is needed, discharged oil gas firstly enters the membrane assembly 21 of the first filter assembly 20 through the air inlet 21a via the first air inlet pipe 10. The membrane module 21 may separate oil and gas to form high concentration oil and gas and low concentration oil and gas. The high-concentration oil gas can be intensively recycled through the membrane component 21. The low concentration oil gas may enter the canister 31 through the exhaust port 21b via the second intake pipe 32. The low concentration of the oil and gas is adsorbed by the activated carbon in the carbon canister 31, thereby further reducing the concentration of the oil and gas so that the oil and gas discharged into the atmosphere reaches the discharge standard.

The oil and gas discharged from the oil tank enters the membrane module 21 through the first intake pipe 10 from the intake port 21 a. Part of the oil gas entering the membrane module 21 returns to the oil tank as high-concentration oil gas, and part of the oil gas enters the carbon tank 31 as low-concentration oil gas from the exhaust port 21b through the second intake pipe 32. The activated carbon in the carbon tank 31 adsorbs oil and gas molecules to the surface of the activated carbon by its own adsorption force, thereby effectively reducing the concentration of oil and gas. The gas purified in the carbon tank 31 may be discharged to the atmosphere through the first exhaust pipe 33.

The vacuum pump 40 can vacuumize the membrane module 21 through the pumping hole 21c, so that the membrane module 21 generates negative pressure, and the gas containing oil gas can flow in the membrane module 21 quickly. After the gas containing the oil gas is filtered by the membrane module 21, a part of the gas is converted into high-concentration oil gas, and is discharged from the air extraction opening 21c, and a part of the oil gas is discharged from the air outlet 21b in the form of low-concentration oil gas.

The oil and gas recovery processing device 100 of the embodiment of the present application includes a first filter assembly 20 and a second filter assembly 30 that are disposed in series. Through setting up first filter component 20 can filter and separate the oil gas of oil storage tank emission, be favorable to reducing the oil gas concentration in the gas of entering carbon tank 31 in the second filter component 30, avoid entering carbon tank 31's oil gas concentration too high to be favorable to prolonging the life of active carbon in the carbon tank 31. Meanwhile, the carbon tank 31 in the second filter assembly 30 can be used for carrying out carbon adsorption on oil gas, so that the concentration of the oil gas is further reduced, the cleanliness of gas discharged into the atmosphere is improved, and the environmental pollution is reduced.

In some embodiments, referring to fig. 1 and 2, the membrane assembly 21 further includes a housing 211, a center tube 212, and a filtering membrane 213. The intake port 21a and the exhaust port 21b are provided in the housing 211. The housing 211 is formed with an inner cavity. The center tube 212 and the filtering membrane 213 are disposed in the inner cavity of the housing 211. The air inlet 21a is provided on one side of the filtering membrane body 213 and the air outlet 21b is provided on the other side of the filtering membrane body 213 in the axial direction of the center tube 212. The filter membrane 213 is coated on the outer surface of the center tube 212. An extraction opening 21c is provided at one end of the center tube 212. The wall of the central tube 212 has a plurality of through holes. The oil gas introduced from the air inlet 21a may enter the center pipe 212 through the through-hole after passing through the filtering membrane 213, and then be discharged from the air suction port 21c.

The housing 211 is used for providing mechanical protection for the central tube 212 and the filtering membrane 213, and preventing the central tube 212 and the filtering membrane 213 from being damaged due to impact. Meanwhile, the cavity formed by the housing 211 is used for providing space for the circulation of the oil and gas, so that the oil and gas enters the filtering membrane 213 through the air inlet 21 a.

The filtering membrane 213 is used for filtering and separating the oil and gas entering the membrane module 21. The vacuum pump 40 performs vacuum suction on the central tube 212 through the suction port 21c to generate negative pressure on the central tube 212, thereby facilitating rapid flow of the gas containing the oil gas in the membrane module 21, and the oil gas separated by the filtering membrane body 213 can easily enter the central tube 212.

Because the inside of the central tube 212 is in a negative pressure state, the oil gas passes through the filtering membrane 213 and permeates toward the central tube 212, so that the oil gas is separated. The high-concentration oil gas filtered by the filtering membrane 213 can flow into the central tube 212 from the filtering membrane 213 and be recovered intensively, while the oil gas filtered by the filtering membrane 213 but not entering the central tube 212 forms low-concentration oil gas. The low-concentration oil gas is discharged from the side of the filtering membrane 213 near the exhaust port 21b, and then discharged through the exhaust port 21b, and then enters the carbon tank 31 through the second air inlet pipe 32.

In some embodiments, referring to fig. 1 and 3, the first filter assembly 20 further includes a first control valve 22, a second control valve 23, and a third control valve 24. The first control valve 22 is provided to the first intake pipe 10. The first control valve 22 is used to open or close the first intake pipe 10. The second control valve 23 is provided in the second intake pipe 32. The second control valve 23 is used to open or close the second intake pipe 32. The third control valve 24 is provided between the vacuum pump 40 and the suction port 21c.

In some examples, when the first control valve 22 is in an open state, oil and gas enters the first control valve 22 through the first intake pipe 10. The oil and gas flows out of the first control valve 22 and then into the membrane module 21. When the first control valve 22 is in the off state, the oil-gas flow through the first intake pipe 10 cannot enter the membrane module 21 through the first control valve 22.

In some examples, when the second control valve 23 is in an open state, oil and gas passes into the second control valve 23. The oil and gas flows out of the second control valve 23 and then into the carbon canister 31. When the second control valve 23 is in the off state, oil gas cannot enter the canister 31 through the second control valve 23 from the exhaust port 21 b.

In some examples, when the third control valve 24 is in an open state and the vacuum pump 40 is in an operating state, vacuum may be drawn on the central tube 212 through the suction port 21c, so that a negative pressure is generated on the central tube 212, and oil gas entering the central tube 212 is recovered. When the third control valve 24 is in the off state, the vacuum pump 40 cannot evacuate the center tube 212 through the evacuation port 21c.

In some embodiments, referring to fig. 1, first filter assembly 20 further comprises a positive pressure gauge 25. The positive pressure gauge 25 is provided in the first intake pipe 10. The first control valve 22 is disposed between the positive pressure gauge 25 and the intake port 21a, i.e., the positive pressure gauge 25 is located upstream of the first control valve 22. The positive pressure gauge 25 is used to monitor the pressure of the oil and gas entering the first intake pipe 10.

In some examples, positive pressure gauge 25 has explosion proof properties that may meet explosive gas environment usage requirements.

In some embodiments, referring to fig. 1, the first filter assembly 20 further includes a first throttle valve 26. The first throttle valve 26 is provided in the second intake pipe 32. The first throttle valve 26 is provided between the second control valve 23 and the exhaust port 21 b. The first throttle valve 26 is used to regulate the flow rate of the oil and gas flowing out of the exhaust port 21b, so that the flow rate of the oil and gas flowing through the second intake pipe 32 is stabilized.

In some embodiments, referring to fig. 1, the first control valve 22, the second control valve 23, and the third control valve 24 are all explosion-proof solenoid valves. Therefore, the oil gas recovery processing device 100 can meet the explosion-proof grade requirement of the site, so that the oil gas recovery processing device 100 can be applied to occasions needing explosion-proof capability.

In some embodiments, referring to fig. 1, the second filter assembly 30 further includes a fourth control valve 34 and a fifth control valve 35. The fourth control valve 34 is provided in the first exhaust pipe 33. The fourth control valve 34 is used to open or close the first exhaust pipe 33. The fifth control valve 35 is provided between the vacuum pump 40 and the canister 31.

In some examples, when the fourth control valve 34 is in an open state, the oil and gas filtered through the canister 31 enters the fourth control valve 34, then flows out of the fourth control valve 34, and then is vented to the atmosphere. When the fourth control valve 34 is in the off state, the oil and gas cannot be discharged to the atmosphere through the fourth control valve 34.

In some examples, when fifth control valve 35 is in an open state while vacuum pump 40 is in an active state, canister 31 may be evacuated, thereby allowing transfer of the hydrocarbon molecules adsorbed by the activated carbon in canister 31 to the outer surface of the activated carbon. When the fifth control valve 35 is in the off state, the vacuum pump 40 cannot evacuate the canister 31.

In some embodiments, referring to fig. 1, the second filter assembly 30 further includes a concentration sensor 36. The concentration sensor 36 is provided between the carbon tank 31 and the fourth control valve 34. The concentration sensor 36 detects a concentration value of the oil gas discharged from the canister 31.

Illustratively, when the concentration sensor 36 detects that the concentration value of the hydrocarbon discharged from the canister 31 is below a predetermined value, the fourth control valve 34 may be allowed to open, thereby discharging the purified gas to the atmosphere, which is advantageous in reducing environmental pollution.

In some embodiments, referring to FIG. 1, the oil and gas recovery processing device 100 further includes a purge assembly 50. The purge assembly 50 includes a second throttle valve 51 and a sixth control valve 52. A sixth control valve 52 is connected to the canister 31. The sixth control valve 52 is provided between the second throttle valve 51 and the canister 31.

The purge assembly 50 is used to purge the activated carbon of the carbon canister 31 so that the adsorption capacity of the activated carbon can be restored to some extent. In some examples, the vacuum pump 40 and the fifth control valve 35 are both in an open state, and after the canister 31 is evacuated for a period of time, the second throttle valve 51 and the sixth control valve 52 are opened to purge the activated carbon of the canister 31, so that the service life of the activated carbon can be prolonged.

In some examples, the second throttle valve 51 and the sixth control valve 52 may be explosion-proof valves to meet explosive gas environment usage requirements.

In some embodiments, referring to FIG. 1, the oil and gas recovery processing device 100 further includes an oil return pipe 60. The vacuum pump 40 is connected to a return line 60.

In some examples, with the center tube 212 at negative pressure, the high concentration oil gas separated by the filtering membrane 213 enters the center tube 212. The high-concentration oil gas is collected intensively in the central pipe 212 and then is recovered into the oil storage tank for reuse through the oil return pipe 60, thereby realizing safety and environmental protection and simultaneously producing economic benefits.

Illustratively, the oil and gas recovery processing device 100 further includes a thermometer 70. The thermometer 70 is provided in the oil return pipe 60. A thermometer 70 is provided downstream of the vacuum pump 40. The thermometer 70 is used to monitor the temperature of the high concentration oil and gas in the oil return pipe 60.

Illustratively, when the tank pressure reaches 150 pascals, the first control valve 22, the second control valve 23, the third control valve 24, the fourth control valve 34, and the vacuum pump 40 are opened. Oil gas discharged from the oil tank first enters the positive pressure gauge 25 through the first air inlet pipe 10. Oil and gas flows from positive pressure gauge 25 and then into first control valve 22. The oil and gas flows out of the first control valve 22 and then enters the inner cavity formed by the housing 211 of the membrane module 21 through the air inlet 21 a. The vacuum pump 40 performs vacuum suction on the central tube 212 through the suction port 21c. A part of the oil gas entering the inner chamber is converted into high-concentration oil gas through the filtering membrane 213. The high-concentration oil gas is collected intensively by the central pipe 212 and finally recovered into an oil storage tank for reuse through the oil return pipe 60. Meanwhile, the other part of low-concentration oil gas which passes through the filtering membrane 213 but does not enter the central tube 212 is discharged from the exhaust port 21b, passes through the first throttle valve 26 and the second control valve 23, and enters the carbon tank 31.

For example, when the tank pressure drops to 50 pascals, the first control valve 22, the second control valve 23, and the fourth control valve 34 are closed. After 10 seconds, the third control valve 24 is closed, and the vacuum pump 40 is stopped.

Illustratively, oil and gas enters the cavity formed by housing 211 of membrane module 21 through air inlet 21 a. Wherein a portion of the hydrocarbons pass through the filtering membrane 213 but do not enter the center tube 212 to form a low concentration of hydrocarbons. The low-concentration oil gas is discharged from the exhaust port 21b, passes through the first throttle valve 26 and the second control valve 23, and enters the carbon tank 31. The oil gas is pretreated by the membrane component 21, so that the concentration of the oil gas entering the carbon tank 31 can be reduced to 80-150 g/m ³ 。

In this specification, each embodiment or implementation is described in a progressive manner, and each embodiment focuses on a difference from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. An oil and gas recovery processing device, characterized by comprising:

a first air inlet pipe;

the first filter assembly comprises a membrane assembly, the membrane assembly comprises an air inlet, an air outlet and an air extraction opening, and the air inlet is connected with the first air inlet pipe;

the second filtering assembly comprises a carbon tank, a second air inlet pipe and a first air outlet pipe, wherein the carbon tank is respectively connected with the second air inlet pipe and the first air outlet pipe, the second air inlet pipe is connected with the air outlet, and the first air outlet pipe is communicated with the atmospheric environment;

and the air extraction opening is connected with the vacuum pump.

2. The oil gas recovery processing device according to claim 1, wherein the membrane module further comprises a housing, a central tube and a filtering membrane body, the air inlet and the air outlet are formed in the housing, an inner cavity is formed in the housing, the central tube and the filtering membrane body are arranged in the inner cavity of the housing, the filtering membrane body is coated on the outer surface of the central tube, and the air extraction opening is formed in one end of the central tube.

3. The oil and gas recovery processing device according to claim 2, wherein the first filter assembly further comprises a first control valve, a second control valve and a third control valve, the first control valve is disposed in the first air intake pipe, the first control valve is used for opening or closing the first air intake pipe, the second control valve is disposed in the second air intake pipe, the second control valve is used for opening or closing the second air intake pipe, and the third control valve is disposed between the vacuum pump and the air extraction opening.

4. The oil and gas recovery processing device of claim 3, wherein the first filter assembly further comprises a positive pressure gauge disposed in the first air intake pipe, and the first control valve is disposed between the positive pressure gauge and the air intake.

5. The oil and gas recovery processing device of claim 4, wherein the first filter assembly further comprises a first throttle valve disposed in the second intake pipe, the first throttle valve disposed between the second control valve and the exhaust port.

6. The oil and gas recovery processing device according to claim 3, wherein the first control valve, the second control valve, and the third control valve are all explosion-proof solenoid valves.

7. The oil and gas recovery processing device of claim 1, wherein the second filter assembly further comprises a fourth control valve and a fifth control valve, the fourth control valve is disposed on the first exhaust pipe, the fourth control valve is used for opening or closing the first exhaust pipe, and the fifth control valve is disposed between the vacuum pump and the carbon tank.

8. The oil and gas recovery processing device of claim 7, wherein the second filter assembly further comprises a concentration sensor disposed between the carbon canister and the fourth control valve, the concentration sensor configured to detect a concentration value of oil and gas discharged from the carbon canister.

9. The oil and gas recovery processing device of claim 1, further comprising a purge assembly including a second throttle valve and a sixth control valve, the sixth control valve being connected to the carbon canister, the sixth control valve being disposed between the second throttle valve and the carbon canister.

10. The oil and gas recovery processing device according to any one of claims 1 to 9, further comprising a return line, the vacuum pump being connected to the return line.

Images