Oil and gas development waste gas treatment system and treatment method

Abstract

The invention discloses an oil and gas development waste gas treatment system and treatment method. The system comprises a waste gas collecting device used for collecting waste gas generated in an oil and gas development ground waste gas generating device; the waste gas homogenizing device is used for homogenizing the received waste gas; the catalytic combustion device is used for performing catalytic combustion on the homogenized waste gas; the heat recovery device is used for carrying out heat recovery on flue gas generated by combustion in the catalytic combustion device through a heat recovery medium; a heat recovery medium storage unit for storing a heat recovery medium; the material outlet of the heat recovery medium storage unit is communicated with the medium inlet of the heat recovery device, the material inlet of the heat recovery medium storage unit is communicated with the medium outlet of the waste gas generation device, and the medium outlet of the heat recovery device is communicated with the medium inlet of the waste gas generation device. The system not only purifies and treats waste gas, but also realizes self-utilization of heat generated in the treatment process, and realizes cooperation of pollutant emission reduction and resource utilization.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas development, in particular to technologies related to the recovery and resource utilization of organic waste gas, and in particular to an oil and gas development waste gas treatment system and method. Background Art

[0002] Fine particulate matter (PM 2.5 ) and ozone are one of the main environmental challenges faced in the field of air pollution prevention and control. Studies have shown that volatile organic compounds (VOCs) are the main precursors of particulate matter and ozone, which have a significant impact on the air quality in urban areas.

[0003] The oil and gas development process is a key source of VOCs emissions, which has a high degree of impact on the surrounding environment. Relevant monitoring data show that the VOCs emissions in the oil and gas development process in the United States reach millions of tons per year, and storage tanks are the main source of VOCs emissions. According to relevant data from typical oil fields, VOCs from storage tanks account for more than 80% of the total emissions of enterprises. In summary, the prevention and control of organic waste gas pollution from VOCs emission sources in the oil and gas development industry will play a key supporting role in improving regional environmental air quality.

[0004] During the oil and gas development process, the aeration link of the produced water storage tank is a significant source of VOCs emissions. This process mainly uses an external gas source to aerate the produced water, accelerate the oil-water separation, and the oil layer enters the waste oil tank. The produced water is subsequently treated, and the stripping gas carries the volatile VOCs components into the atmosphere. The stripping gas contains a high concentration of oil and gas components, which is not only a potential source of atmospheric pollution, but also causes the loss of flammable oil and gas and wastes resources. The development of collection, management and utilization technology for stripping gas based on an external gas source will play a key supporting role in the green and low-carbon development of oil and gas development.

[0005] At the current stage, there is basically no corresponding collection and treatment of the stripping gas used for external air source, and a large amount of VOCs-containing waste gas is directly discharged. The VOCs waste gas emission of a single aeration tank can reach up to tens of thousands of cubic meters per hour. Summary of the invention

[0006] In order to enrich the products to suit more application scenarios, the inventors have made the present invention, and through specific implementation methods, provide an oil and gas development waste gas treatment system and method, which not only purifies and treats the waste gas, but also realizes the self-utilization of the heat generated in the treatment process, and achieves the synergy of pollutant emission reduction and resource utilization.

[0007] In a first aspect, an embodiment of the present invention provides an oil and gas development waste gas treatment system, comprising:

[0008] Waste gas collection device, used to collect waste gas generated by waste gas generating devices on the ground during oil and gas development;

[0009] An exhaust gas homogenizing device, used for homogenizing the exhaust gas received and transmitted from the exhaust gas collecting device;

[0010] Catalytic combustion device, used for catalytic combustion of the stabilized and homogenized exhaust gas to oxidatively decompose it;

[0011] A heat recovery device, used to recover heat from flue gas generated by combustion in the catalytic combustion device through a heat recovery medium;

[0012] A heat recovery medium storage unit is used to store heat recovery medium; the material outlet of the heat recovery medium storage unit is connected to the medium inlet of the heat recovery device, the material inlet of the heat recovery medium storage unit is connected to the medium outlet of the exhaust gas generating device, and the medium outlet of the heat recovery device is connected to the medium inlet of the exhaust gas generating device.

[0013] In some embodiments, the exhaust gas homogenization device is provided with a homogenization bed for adsorbing and analyzing the combustibles in the exhaust gas so that the exhaust gas is output within a set combustible concentration range.

[0014] In some embodiments, the homogenous bed is a single bed layer or a multi-stage filling form; the adsorption material of the homogenous bed is at least one of resin, activated carbon and silica gel.

[0015] In some embodiments, the heat recovery device is used to recover heat from the flue gas generated by combustion in the catalytic combustion device by using a heat recovery medium through heat transfer methods such as heat conduction or heat radiation.

[0016] In some embodiments, the catalytic combustion device is also connected to an air supply device.

[0017] In some embodiments, the air supply device is used to control the combustion temperature in the catalytic combustion device by adjusting the air supply volume.

[0018] In some embodiments, it further includes a first exhaust gas conveying device, a cold medium conveying device, a hot medium conveying device, and a second exhaust gas conveying device;

[0019] The first exhaust gas conveying device is disposed between the exhaust gas collecting device and the exhaust gas homogenizing device, and is used to convey the exhaust gas to the exhaust gas homogenizing device;

[0020] The cold medium conveying device is arranged between the heat recovery medium storage unit and the heat recovery device, and is used for conveying the heat recovery medium before heat exchange;

[0021] The hot medium conveying device is arranged between the heat recovery device and the exhaust gas generating device, and is used for conveying the heat recovery medium after heat exchange;

[0022] The second exhaust gas conveying device is arranged between the exhaust gas homogenization device and the catalytic combustion device, and is used for conveying the homogenized exhaust gas.

[0023] In some embodiments, the cold medium conveying device and the hot medium conveying device are both configured as liquid pressure pumps;

[0024] The first exhaust gas conveying device and the second exhaust gas conveying device are both configured as gas pressure pumps.

[0025] In some embodiments, the waste gas generating device is a produced water storage tank, a waste oil storage tank, or a crude oil storage tank.

[0026] In a second aspect, an embodiment of the present invention provides a method for treating waste gas from oil and gas development, comprising:

[0027] By using any of the above-mentioned oil and gas development waste gas treatment systems, the degassing generated in the oil and gas development ground waste gas generating device is recovered and treated.

[0028] The beneficial effects of the above technical solution provided by the embodiment of the present invention include at least:

[0029] (1) The oil and gas development waste gas treatment system provided in the embodiment of the present invention includes a waste gas collection device, a waste gas homogenization device, a catalytic combustion device, a heat recovery device and a heat recovery medium storage unit. The catalytic combustion device is used to oxidize and decompose the waste gas in situ, thereby improving the atmospheric environment and greatly reducing the pollution caused by the discharge of pollutants; the heat recovery device and the heat recovery medium storage unit are used to realize the reuse of the heat generated by the degassing combustion and the replacement of the heating system fuel in the waste gas generating device, thereby realizing a high utilization rate of organic waste, reducing the operating cost, and indirectly increasing the yield of oil and gas products. Through the integrated design of waste gas collection and heat utilization, the treatment process is optimized, and the coordination of pollutant emission reduction and resource utilization is realized.

[0030] (2) The oil and gas development waste gas treatment system provided in the embodiment of the present invention includes a waste gas homogenization device, which is used to stabilize and homogenize the waste gas received from the waste gas collection device, so that the waste gas entering the catalytic combustion device has a relatively uniform combustible concentration, thereby improving the safety of the treatment process; at the same time, the waste gas treatment process is convenient and has a high degree of process matching and low investment cost; it can be flexibly adjusted according to different waste gas emissions and concentrations, and has the advantages of simple process and high operational flexibility.

[0031] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0032] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0034] Figure 1 This is a schematic diagram of the structure of the oil and gas development waste gas treatment system in an embodiment of the present invention;

[0035] Figure 2 It is a schematic structural diagram of another oil and gas development waste gas treatment system in an embodiment of the present invention. DETAILED DESCRIPTION

[0036] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0037] It should be understood that the terms described in the present invention are only for describing special embodiments and are not intended to limit the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which the present invention belongs. Although the present invention only describes preferred methods and materials, any methods and materials similar or equivalent to those described herein may also be used in the implementation or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe methods and / or materials related to the documents. In the event of conflict with any incorporated document, the content of this specification shall prevail.

[0038] In the description of the present invention, it should be noted that the terms "include", "including", "have", "contain" and the like are open terms, meaning including but not limited to.

[0039] The embodiments of the present invention provide an oil and gas development waste gas treatment system and method, which can achieve the coordination of pollutant emission reduction and resource utilization.

[0040] Embodiment 1

[0041] Embodiment 1 of the present invention provides an oil and gas development waste gas treatment system, referring to Figure 1 As shown, it includes an exhaust gas collecting device 2, an exhaust gas homogenizing device 4, a catalytic combustion device 5, a heat recovery device 6 and a heat recovery medium storage unit 7.

[0042] The waste gas collecting device 2 is used to collect the waste gas generated by the surface waste gas generating device 1 of oil and gas development.

[0043] Specifically, the waste gas generating device can be a produced water storage tank, a waste oil storage tank or a crude oil storage tank, or it can be other types of ground storage tanks or other storage units used in the oil and gas development process; in addition, the embodiment of the present invention does not limit the specific type of storage tank, as long as the waste gas treatment process generated in the storage tank is suitable for a combustion oxidation process, and the working process of the storage tank requires heating to maintain.

[0044] For example, the waste gas generating device may be an aeration unit in the oil and gas development process, including an aeration tank, an aeration tank, and other external air source enhanced aeration devices.

[0045] In addition, the exhaust gas generating device 1 shown in the drawings is not a component of the exhaust gas treatment system for oil and gas development.

[0046] The exhaust gas homogenization device 4 is used to homogenize the exhaust gas received and transmitted from the exhaust gas collection device.

[0047] The exhaust gas homogenization device 4 is provided with a homogenization bed for adsorbing and analyzing the combustibles in the exhaust gas so that the exhaust gas is output within a set combustible concentration range.

[0048] The exhaust gas from the exhaust gas collecting device 2 enters the exhaust gas homogenizing device 4. In the exhaust gas homogenizing device 4, the combustible matter in the exhaust gas undergoes adsorption concentration and analysis with the homogenizing bed, and the exhaust gas combustible matter concentration, exhaust gas flow rate and pressure are stabilized.

[0049] Specifically, when the concentration of combustible substances (VOCs) in the incoming gas is high, the VOCs components in the exhaust gas are adsorbed and stored to reduce the concentration of combustible substances in the exhaust gas; when the concentration of VOCs in the incoming gas is low, the adsorbed VOCs components are analyzed and desorbed to increase the concentration of combustible substances in the exhaust gas, so that the exhaust gas entering the catalytic combustion device has a relatively uniform VOCs concentration.

[0050] Furthermore, the homogenized bed can be in the form of a fixed bed, a moving bed, etc.; the bed filling can be in the form of a single bed layer or multi-stage filling, etc.; the adsorption material can be one or more of macroporous resin, activated carbon, silica gel, etc.

[0051] The catalytic combustion device 5 is used for catalytic combustion of the stabilized and homogenized exhaust gas to oxidatively decompose it.

[0052] Catalysts are mostly metal oxides. Catalytic combustion of waste gas can oxidize combustible organic matter such as methane and VOCs in the waste gas into CO2 and water, and generate a large amount of combustion heat.

[0053] In some embodiments, the catalytic combustion device 5 is also connected to an air supply device 10 .

[0054] The air supply device 10 is used to control the combustion temperature in the catalytic combustion device 5 by adjusting the air supply volume. That is, the degree of combustion in the catalytic combustion device 5 is controlled by adjusting the air supply volume.

[0055] The heat recovery device 6 is used to recover heat from the high-temperature flue gas generated by combustion in the catalytic combustion device 5 through a heat recovery medium; the heat recovery medium can be used to recover heat from the high-temperature flue gas generated by combustion in the catalytic combustion device 5 through heat transfer methods such as heat conduction or heat radiation.

[0056] The heat recovery medium storage unit 7 is used to store the heat recovery medium.

[0057] The material outlet of the heat recovery medium storage unit 7 is connected to the medium inlet of the heat recovery device 6 , the material inlet of the heat recovery medium storage unit 7 is connected to the medium outlet of the exhaust gas generating device 1 , and the medium outlet of the heat recovery device 6 is connected to the medium inlet of the exhaust gas generating device 1 .

[0058] The heat recovery medium storage unit 7, the heat recovery device 6 and the heat recovery medium circulation pipeline in the exhaust gas generating device 1 constitute a heat recovery circulation unit. The heat recovered by the heat recovery device 6 is transmitted to the exhaust gas generating device 1 through the circulation of the heat recovery medium.

[0059] In some embodiments, the system further includes a first exhaust gas conveying device 3 , which is disposed between the exhaust gas collecting device 2 and the exhaust gas homogenizing device 4 and is used to convey the exhaust gas to the exhaust gas homogenizing device 4 .

[0060] The exhaust gas outlet of the exhaust gas generating device 1 is connected to the air inlet of the exhaust gas collecting device 2, the air outlet of the exhaust gas collecting device 2 is connected to the material inlet of the first exhaust gas conveying device 3; the material outlet of the first exhaust gas conveying device 3 is connected to the air inlet of the exhaust gas homogenization device 4; the air outlet of the exhaust gas homogenization device 4 is connected to the fuel gas inlet of the catalytic combustion device 5; the flue gas outlet of the catalytic combustion device 5 is connected to the gas inlet of the heat recovery device 6; the material outlet of the heat recovery medium storage unit 7 is connected to the heat medium inlet of the heat recovery device 6.

[0061] The oil and gas development waste gas treatment system provided in Example 1 of the present invention includes a waste gas collection device, a waste gas homogenization device, a catalytic combustion device, a heat recovery device and a heat recovery medium storage unit. The waste gas is oxidized and decomposed in situ by the catalytic combustion device, which improves the atmospheric environment and greatly reduces the pollution caused by sewage discharge; the heat recovery device and the heat recovery medium storage unit realize the reuse of the heat generated by degassing combustion and the replacement of the heating system fuel in the waste gas generating device, thereby achieving a high utilization rate of organic waste, reducing operating costs, and indirectly increasing the yield of oil and gas products. Through the integrated design of waste gas collection and heat utilization, the treatment process is optimized, and the coordination of pollutant emission reduction and resource utilization is achieved.

[0062] The oil and gas development waste gas treatment system provided in Example 1 of the present invention includes a waste gas homogenization device, which is used to stabilize and homogenize the waste gas received and transmitted from the waste gas collection device, so that the waste gas entering the catalytic combustion device has a relatively uniform combustible concentration, thereby improving the safety of the treatment process; at the same time, the waste gas treatment process is convenient and the process matching degree is high, and the investment cost is low; it can be flexibly adjusted according to different waste gas emissions and concentrations, and has the advantages of simple process and high operational flexibility.

[0063] In some embodiments, see Figure 2 As shown, the system includes, in addition to the first exhaust gas conveying device 3 , a cold medium conveying device 8 , a hot medium conveying device 9 and a second exhaust gas conveying device 11 .

[0064] The cold medium conveying device 8 is arranged between the heat recovery medium storage unit 7 and the heat recovery device 6, and is used for conveying the heat recovery medium before heat exchange;

[0065] The hot medium conveying device 9 is arranged between the heat recovery device 6 and the exhaust gas generating device 1, and is used for conveying the heat recovery medium after heat exchange;

[0066] The second exhaust gas conveying device 11 is disposed between the exhaust gas homogenization device 4 and the catalytic combustion device 5 and is used for conveying the homogenized exhaust gas.

[0067] The cold medium conveying device 8 and the hot medium conveying device 9 are both configured as liquid pressure pumps;

[0068] The first exhaust gas conveying device 3 and the second exhaust gas conveying device 11 are both configured as gas pressure pumps.

[0069] The heat exchange medium enters the heat recovery device 6 through the power provided by the cold medium conveying device 8, exchanges heat with the high-temperature flue gas, the heat exchange medium is heated, and the high-temperature flue gas is cooled; the heated heat exchange medium enters the exhaust gas generating device 1 under the action of the hot medium conveying device 9, heats the oil and gas mixture in the exhaust gas generating device, and the heat exchange medium after heat exchange enters the heat exchange medium storage unit 7 for the next heat exchange cycle.

[0070] Based on the inventive concept of the present invention, an embodiment of the present invention further provides a method for treating waste gas from oil and gas development, comprising:

[0071] By using any of the above-mentioned oil and gas development waste gas treatment systems, the waste gas generated in the oil and gas development ground waste gas generating device is recovered and treated.

[0072] The embodiments of the present invention can be applied to the treatment and reduction of organic waste gas in the oil and gas development process, and are particularly suitable for the treatment of VOCs-containing waste gas with high ventilation volume in the aeration process and on-site links with heat demand, and can achieve VOCs emission reduction and heat self-utilization. The oil and gas development processes involved include: crude oil, heavy oil, condensate natural gas and other oil and gas development processes.

[0073] In the process of major oil and gas development, part of the self-produced associated gas needs to be burned in the sewage treatment link for heating of produced water storage tanks, waste oil tanks, crude oil tanks and other storage tanks. In the context of vigorously improving the green and low-carbon attributes of the oil and gas development process, the in-situ utilization of the self-produced organic waste gas in the process can realize heat utilization and indirectly increase oil and gas production, which is of great significance for enterprises to do a good job in reducing pollution and carbon emissions and improving quality and efficiency.

[0074] Embodiment 2

[0075] Embodiment 2 of the present invention provides a specific application of a method for treating waste gas from oil and gas development. Taking the aeration link of a sewage treatment station in a certain oil and gas development process as an example, the above-mentioned oil and gas development waste gas treatment system is used to treat waste gas containing VOCs and utilize energy for self-utilization.

[0076] The VOCs-containing waste gas generated in the aeration process is collected by the waste gas collection device, and the waste gas is collected into the homogenization device through the first waste gas conveying device. The methane and VOCs components in the waste gas undergo adsorption and desorption processes with the homogenization bed, and the waste gas composition and concentration are stabilized; the VOCs-containing waste gas after homogenization enters the catalytic combustion device for oxidation reaction, generating CO2, water and a large amount of heat; the high-temperature flue gas enters the heat recovery device after leaving the catalytic combustion device, and heat recovery is achieved through the heat recovery process between the heat exchange medium and the high-temperature flue gas. The hot heat exchange medium enters the waste gas generation device to transport the recovered heat to the heat demand process, realizing the self-utilization of heat in the sewage treatment process.

[0077] By using the system and method for waste gas collection, in-situ purification of pollutants and in-situ heat recovery and utilization involved in the embodiments of the present invention, the collection and treatment of VOCs waste gas discharged from the aeration stage and heat recovery and utilization are realized by using waste gas collection, catalytic oxidation and heat recovery devices and units, the total amount of organic waste gas in the sewage treatment process is greatly reduced, the use rate of self-used fuel is significantly reduced, and the commercialization rate of oil and gas products is improved. Specifically, the aeration stage of the wastewater treatment station in the oil and gas development process is expected to reduce the emission of VOCs waste gas by 375 to 1,500 tons (500,000 to 2 million cubic meters), the fuel gas is expected to be reduced by 600,000 to 2.1 million cubic meters, and the commercial oil and gas is expected to increase by 225 to 900 tons; the VOCs emission reduction ratio in the sewage stage of the oil and gas development process reaches more than 60%. The method and system proposed in the embodiment of the present invention are expected to save 7.5 to 30 million yuan in pollution tax each year (the pollutant equivalent is 0.05 kg, and the atmospheric pollutant is 1.2 yuan per pollution equivalent); 750,000 to 3 million yuan (the pollutant equivalent is 0.5 kg, and the atmospheric pollutant is 1.2 yuan per pollution equivalent).

[0078] It should be understood that the specific order or hierarchy of steps in the disclosed process is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process can be rearranged without departing from the scope of protection of the present disclosure. The attached method claims present the elements of the various steps in an exemplary order and are not intended to be limited to the specific order or hierarchy described.

[0079] In the above detailed description, various features are grouped together in a single embodiment to simplify the disclosure. This method of disclosure should not be interpreted as reflecting an intention that the embodiments of the claimed subject matter require more features than are clearly stated in each claim. On the contrary, as reflected in the appended claims, the invention is in a state of having less than all the features of the disclosed individual embodiments. Therefore, the appended claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

[0080] The above description includes examples of one or more embodiments. Of course, it is impossible to describe all possible combinations of components or methods for the purpose of describing the above embodiments, but it should be recognized by those skilled in the art that the various embodiments can be further combined and arranged. Therefore, the embodiments described herein are intended to cover all such changes, modifications and variations that fall within the scope of protection of the appended claims. In addition, with respect to the term "comprising" used in the specification or claims, the word is covered in a manner similar to the term "including", just as "including," explained as a transitional word in the claims. In addition, any term "or" used in the specification of the claims is intended to represent "non-exclusive or". The terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance.

Claims

1. An oil and gas development waste gas treatment system, characterized in that: include: Waste gas collection device, used to collect waste gas generated by waste gas generating devices on the ground during oil and gas development; An exhaust gas homogenizing device, used for homogenizing the exhaust gas received and transmitted from the exhaust gas collecting device; Catalytic combustion device, used for catalytic combustion of the stabilized and homogenized exhaust gas to oxidatively decompose it; A heat recovery device, used to recover heat from flue gas generated by combustion in the catalytic combustion device through a heat recovery medium; A heat recovery medium storage unit is used to store heat recovery medium; the material outlet of the heat recovery medium storage unit is connected to the medium inlet of the heat recovery device, the material inlet of the heat recovery medium storage unit is connected to the medium outlet of the exhaust gas generating device, and the medium outlet of the heat recovery device is connected to the medium inlet of the exhaust gas generating device.

2. The system according to claim 1, characterized in that The exhaust gas homogenization device is provided with a homogenization bed for adsorbing and analyzing the combustibles in the exhaust gas so that the exhaust gas is output within a set combustible concentration range.

3. The system according to claim 2, characterized in that The homogenous bed is in the form of a single bed layer or a multi-stage filling; The adsorption material of the homogeneous bed is at least one of resin, activated carbon and silica gel.

4. The system according to claim 1, characterized in that The heat recovery device is used to recover heat from the flue gas generated by combustion in the catalytic combustion device by using a heat recovery medium through heat conduction or heat radiation.

5. The system according to claim 1, wherein: The catalytic combustion device is also connected to an air supply device.

6. The system according to claim 5, characterized in that The air supply device is used to control the combustion temperature in the catalytic combustion device by adjusting the air supply volume.

7. The system according to claim 1, characterized in that It also includes a first exhaust gas conveying device, a cold medium conveying device, a hot medium conveying device, and a second exhaust gas conveying device; The first exhaust gas conveying device is disposed between the exhaust gas collecting device and the exhaust gas homogenizing device, and is used to convey the exhaust gas to the exhaust gas homogenizing device; The cold medium conveying device is arranged between the heat recovery medium storage unit and the heat recovery device, and is used for conveying the heat recovery medium before heat exchange; The hot medium conveying device is arranged between the heat recovery device and the exhaust gas generating device, and is used for conveying the heat recovery medium after heat exchange; The second exhaust gas conveying device is arranged between the exhaust gas homogenization device and the catalytic combustion device, and is used for conveying the homogenized exhaust gas.

8. The system according to claim 7, characterized in that The cold medium conveying device and the hot medium conveying device are both configured as liquid pressure pumps; The first exhaust gas conveying device and the second exhaust gas conveying device are both configured as gas pressure pumps.

9. The system according to any one of claims 1 to 8, characterized in that: The waste gas generating device is a produced water storage tank, a waste oil storage tank or a crude oil storage tank.

10. A method for treating waste gas from oil and gas development, characterized in that: include: By using the oil and gas development waste gas treatment system described in any one of claims 1 to 9, the waste gas generated in the oil and gas development ground waste gas generating device is recovered and treated.

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