Recycling power generation system for exploited gas of remote oil and gas well

Abstract

The invention discloses a remote oil and gas well exploitation gas recycling power generation system. The power generation system comprises a reformer, a gas mixer for providing reaction gas for the reformer and a combustor for providing heat for reforming hydrogen production reaction of the reformer. The SOFC electric pile is used for reacting the hydrogen generated by the reformer to generate electric energy; the air supply device is used for supplying air required by the reformer and the SOFC electric pile reaction; the oil-gas-water separator is used for separating an oil-gas-water mixture extracted from the oil-gas well; and the converter is used for converting the electric energy of the electric pile into alternating current which is used by an electric tracing band of an oil-gas well shaft and / or daily used by oil-gas well workers. According to the invention, the galvanic pile is combined with a remote oil-gas well, so that energy waste is avoided, and environmental pollution is reduced; and electric energy and heat energy are reasonably utilized, so that the power generation system can be kept stable for a long time under the environment temperature fluctuation.

Description

Technical Field

[0001] The invention relates to the technical field of power generation systems, and in particular to a power generation system for recovering and utilizing gas produced by remote oil and gas wells. Background Art

[0002] In the exploitation of oil and gas wells in my country, some remote wells with low production and low pressure, remoteness, rapid production decline and short production cycle are far away from the gathering and transportation pipeline network and are limited by process and technical conditions such as pipelines and pressure. If conventional gathering and transportation methods are adopted, not only will the project investment be large and the production cost be high, but the associated gas or natural gas can only be burned or directly vented for treatment, which not only wastes energy but also causes environmental pollution. In addition, since it is a remote well, it is inconvenient to use electricity for equipment, which also makes it difficult to recover natural gas. Under the condition of energy shortage, fully tapping and recycling the oil and gas resource potential of remote wells can not only avoid the waste of energy and the pollution of the atmosphere by burning gas, but also achieve considerable economic benefits.

[0003] Solid oxide fuel cells (SOFCs) are widely considered to be the most valuable renewable energy technology in the future due to their cleanliness, high efficiency, and no corrosion problems. They can also directly use natural gas to generate electricity, which can effectively solve the problems of equipment electricity consumption and natural gas recycling in remote wells. Therefore, deploying solid oxide fuel cell power generation systems in the production of remote wells can greatly reduce the high cost of natural gas recycling in remote wells. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a power generation system for recovering and utilizing gas produced from remote oil and gas wells.

[0005] The technical solution adopted by the present invention is:

[0006] The present invention provides a power generation system for recovering and utilizing gas produced by remote oil and gas wells, comprising:

[0007] A reformer for converting natural gas steam into hydrogen, a gas mixer for providing reaction gas to the reformer, and a burner for providing heat for the reforming hydrogen production reaction of the reformer;

[0008] A SOFC stack for reacting hydrogen produced by a reformer to generate electricity;

[0009] A gas supply device for supplying air required for the reformer and SOFC stack reaction;

[0010] An oil-gas-water separator used to separate the oil-gas-water mixture extracted from the oil and gas well into oil, natural gas and water, and the separated natural gas and water are used as reaction raw materials for the reformer;

[0011] A converter for converting the electrical energy of the SOFC stack into alternating current for use in the electric heating cables of the oil and gas wellbore and / or for daily use by oil and gas well workers;

[0012] The water outlet and the gas outlet of the oil-gas-water separator are connected to the gas inlet of the gas mixer through pipelines, respectively; the gas outlet of the gas mixer is connected to the gas inlet of the reformer; the gas outlet of the oil-gas-water separator and the gas outlet of the gas supply device are connected to the burner through pipelines, respectively; the hydrogen outlet of the reformer and the gas outlet of the gas supply device are connected to the anode inlet and the cathode inlet of the SOFC stack through pipelines, respectively.

[0013] Furthermore, the water outlet of the oil-gas-water separator is connected to a walnut shell filter and a multi-media filter in sequence, one end of the water outlet of the multi-media filter is connected in parallel to a water storage tank I and a double-membrane filter, one end of the water outlet of the double-membrane filter is connected to a water storage tank II, the water outlet of the water storage tank II is connected to an evaporator, one end of the steam outlet of the evaporator is connected to a gas mixer, and the other end of the steam outlet of the evaporator is connected to the cathode inlet of the SOFC stack after merging with the pipeline of the gas supply device.

[0014] Furthermore, a desulfurization tank is provided between the gas outlet of the oil-gas-water separator and the gas inlet of the gas mixer.

[0015] Furthermore, a preheater for preheating the reaction gas of the reformer is provided between the gas outlet of the gas mixer and the gas inlet of the reformer.

[0016] Furthermore, it also includes a waste heat recovery unit, which includes a heat exchanger I for heat exchange between natural gas and anode tail gas of the SOFC stack, the gas outlet of the oil-gas-water separator is connected to the cold material inlet of the heat exchanger I, the gas mixer is connected to the hot material outlet of the gas exchanger II, and the anode tail gas generated by the SOFC stack passes through the reformer and the evaporator in sequence through a pipeline and is connected to the heat medium inlet of the heat exchanger I.

[0017] Furthermore, the waste heat recovery unit includes a heat exchanger II for heat exchange between the air required for the SOFC stack reaction and the cathode exhaust gas of the SOFC stack and / or the exhaust gas of the reformer, the air outlet of the air supply device is connected to the cold material inlet of the heat exchanger II, the cathode inlet of the SOFC stack is connected to the hot material outlet of the heat exchanger II, and the cathode exhaust gas of the SOFC stack and / or the exhaust gas of the reformer are connected to the heat medium inlet of the heat exchanger II through a pipeline.

[0018] Furthermore, the waste heat recovery unit includes a heat exchanger III for heat exchange between water in a water storage tank I and the anode tail gas generated by the SOFC stack after heat exchanger I and the cathode tail gas of the SOFC stack and / or the tail gas of the reformer after heat exchanger II. The water outlet of the water storage tank I is connected to the cold material inlet of the heat exchanger III, and the hot material outlet of the heat exchanger III is connected to the hot water storage container. The anode tail gas generated by the SOFC stack after heat exchange in the heat exchanger I and the cathode tail gas of the SOFC stack and / or the tail gas of the reformer after heat exchange in the heat exchanger II are connected to the heat medium inlet of the heat exchanger III through a pipeline.

[0019] Furthermore, centrifugal pumps are provided on the connecting pipelines between the oil-gas-water separator and the walnut shell filter, between the walnut shell filter and the multi-media filter, and between the multi-media filter and the double membrane filter, and a buffer tank is also provided between the walnut shell filter and the multi-media filter;

[0020] The walnut shell filter and the multi-media filter are both provided with electrode type liquid level gauges, and the tops of the electrode type liquid level gauges are connected to the electrode type liquid level controllers provided outside the walnut shell filter and the multi-media filter through electric wires.

[0021] Furthermore, a backwash air inlet and a backwash water inlet are provided at the bottom of the walnut shell filter and the multi-media filter. The backwash air inlets of the walnut shell filter and the multi-media filter are respectively connected to the air compressor through pipelines, and the backwash water inlets at the bottom of the walnut shell filter and the multi-media filter are respectively connected to the water outlet of the water storage tank through pipelines, and the water inlet of the water storage tank is connected to the water outlet of the multi-media filter.

[0022] Furthermore, the exhaust gas outlets of the walnut shell filter and the multi-media filter are connected to the exhaust gas collection device through pipelines, and the waste liquid outlets of the walnut shell filter and the multi-media filter are connected to the waste liquid pool through pipelines.

[0023] The beneficial effects of the present invention are:

[0024] The present invention provides a power generation system for recovering gas from remote oil and gas wells, which combines the SOFC stack with the remote oil and gas wells. This eliminates the need to transport natural gas over long distances, greatly improving the utilization efficiency of the natural gas in the oil wells, thereby avoiding energy waste and reducing environmental pollution. Moreover, the power generation system of the present invention ensures that the power generation system can maintain long-term stability under ambient temperature fluctuations by rationally utilizing electrical energy and thermal energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 is a process flow chart of the power generation system of the present invention;

[0027] Figure 2 This is a flow chart for the filtration of water in oil, gas and water.

[0028] Markings in the figure: 1. Pumping unit; 2. Booster station; 3. Meter transfer station; 4. Oil-gas-water separator; 5. Walnut shell filter; 6. Multi-media filter; 7. Double membrane filter; 8. Water storage tank II; 9. Evaporator; 10. Burner; 11. Reformer; 12. SOFC stack; 13. Preheater; 14. Desulfurization tank; 15. Heat exchanger I; 16. Gas mixer; 17. Heat exchanger II; 18. Heat exchanger III; 19. Water storage tank I; 20. Hot water storage container; 21. Blower; 22. One-way valve; 23. Centrifugal pump; 24. Electromagnetic flowmeter; 25. Converter; 26. Buffer tank; 27. Air compressor; 28. Water storage tank; 29. ​​Waste liquid pool; 30. Waste gas collection device. DETAILED DESCRIPTION

[0029] The present invention provides a remote oil and gas well production gas recovery and utilization power generation system. In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] The present invention is described in detail below with reference to the accompanying drawings.

[0031] Reference Figure 1 and Figure 2 This embodiment provides a remote oil and gas well production gas recovery and utilization power generation system, including:

[0032] A reformer 11 for converting natural gas steam into hydrogen, a gas mixer 16 for providing reaction gas to the reformer, and a burner 10 for providing heat for the reforming hydrogen production reaction of the reformer;

[0033] An SOFC stack 12 for reacting hydrogen generated by the reformer to generate electricity;

[0034] A gas supply device for supplying air required for the reformer and SOFC stack reaction;

[0035] An oil-gas-water separator 4 for separating the oil-gas-water mixture extracted from the oil and gas well into oil, natural gas and water, and the separated natural gas and water are used as reaction raw materials for the reformer;

[0036] A converter 25 for converting the electrical energy of the SOFC stack into alternating current for use in the electric heating cables of the oil and gas wellbore and / or for daily use by oil and gas well workers;

[0037] A waste heat recovery unit for recovering and utilizing the tail gas heat of the SOFC stack 12 and the tail gas heat of the reformer 11;

[0038] The water outlet and the gas outlet of the oil-gas-water separator 4 are connected to the gas inlet of the gas mixer 16 through pipelines, and the gas outlet of the gas mixer 16 is connected to the gas inlet of the reformer 11, so as to provide natural gas for the hydrogen production reaction of the reformer 11 and water for forming superheated steam; the gas outlet of the oil-gas-water separator 4 and the gas outlet of the gas supply device are connected to the burner 10 through pipelines, so as to provide natural gas and air for combustion of the burner 10; the hydrogen outlet of the reformer 11 and the gas outlet of the gas supply device are connected to the anode inlet and the cathode inlet of the SOFC stack 12 through pipelines, so as to provide the anode gas and the cathode gas required for power generation of the SOFC stack.

[0039] Specifically, the raw natural gas and water of the power generation system are derived from the oil, gas and water extracted from the oil and gas wells. The oil, gas and water separator 4 is used to separate the oil, gas and water mixture extracted from the oil and gas wells into oil, natural gas and water. The oil, gas and water are extracted from the oil and gas wells by the pumping unit 1 and transported to the boosting station 2 and the meter transfer station 3 in sequence through pipelines for preliminary treatment. The treated oil, gas and water enter the oil, gas and water separator 4 for separation treatment. The oil-gas-water separator 4 has a water outlet, an air outlet and an oil outlet, wherein the water outlet of the oil-gas-water separator 4 is connected to a walnut shell filter 5 and a multi-media filter 6 in sequence, and one end of the water outlet of the multi-media filter 6 is connected in parallel with a water storage tank Ⅰ19 and a double membrane filter 7, respectively. The water storage tank Ⅰ19 is used to store cooling water for heat exchange with the tail gas of the reformer 11 and the tail gas of the SOFC stack 12 after preliminary filtration by the walnut shell filter 5 and the multi-media filter 6; the water outlet of the double membrane filter 7 is connected to a water storage tank Ⅱ8 for storing cooling water after preliminary filtration by the walnut shell filter 5 and the multi-media filter 6. And water finely filtered by the double membrane filter 7, and the water outlet of the water storage tank II 8 is connected to the evaporator 9 which can generate superheated steam, and a centrifugal pump 23, a one-way valve 22 and an electromagnetic flowmeter 24 are arranged between the water storage tank II 8 and the evaporator 9, which are used to control the flow of water entering the evaporator 9, and a three-way valve is arranged at the steam outlet of the evaporator 9, and the evaporator 9 is connected to the gas mixer 16 through one of the outlets of the three-way valve and a pipeline, and the evaporator 9 is connected to the cathode inlet of the SOFC stack 12 after merging with the pipeline of the gas supply device through the other outlet of the three-way valve and the pipeline.

[0040] In addition, the connecting pipelines between the oil-gas-water separator 4 and the walnut shell filter 5, between the walnut shell filter 5 and the multi-media filter 6, and between the multi-media filter 6 and the double membrane filter 7 are all provided with a centrifugal pump 23, a pressure gauge for detecting water pressure and flow, a flow meter and a valve for controlling the opening or closing of the pipeline, and a buffer tank 26 is also provided between the walnut shell filter 5 and the multi-media filter 6; the walnut shell filter 5 and the multi-media filter 6 are both provided with an electrode type liquid level gauge, and the top of the electrode type liquid level gauge is connected to the electrode type liquid level controller arranged outside the walnut shell filter 5 and the multi-media filter 6 through an electric wire. When the electrode type liquid level gauge in the walnut shell filter 5 and the multi-media filter 6 detects that the water level reaches the set value, the electrode type liquid level controller controls the valve on the corresponding pipeline to close and stop supplying water to the corresponding filter.

[0041] One end of the water outlet of the multi-media filter 6 is also connected to a water tank 28 connected in parallel with the water tank Ⅰ19 and the double membrane filter 7. Specifically, a four-way valve is provided on the water outlet pipeline of the multi-media filter 6. The water outlet of the multi-media filter 6 is respectively connected to the water tank Ⅰ19, the double membrane filter 7 and the water tank 28 through the three outlets of the four-way valve. The water stored in the water tank 28 is used as backwash water. The bottom of the walnut shell filter 5 and the multi-media filter 6 is also provided with a backwash air inlet and a backwash water inlet. The backwash air inlets of the walnut shell filter 5 and the multi-media filter 6 are respectively connected to the air compressor 27 through pipelines. The backwash water inlets at the bottom of the walnut shell filter 5 and the multi-media filter 6 are respectively connected to the water tank 28 through pipelines, and a centrifugal pump 23 is provided on the outlet pipeline of the water tank 28.

[0042] The exhaust gas outlets of the walnut shell filter 5 and the multi-media filter 6 are connected to the exhaust gas collecting device 30 through pipelines, and the waste liquid outlets of the walnut shell filter 5 and the multi-media filter 6 are connected to the waste liquid pool 29 through pipelines.

[0043] In the above power generation system, the water separated by the oil-gas-water separator 4 is first transported to the walnut shell filter 5 through the centrifugal pump 23 for preliminary filtration to remove the solid suspended matter and floating oil in the water, and is stored in the buffer tank, and then transported to the multi-media filter 6 through the centrifugal pump 23 for secondary filtration to remove tiny suspended matter, inorganic matter, organic matter and some microorganisms in the water. The filter layer material in the multi-media filter 6 is quartz sand and anthracite, and the support layer material is pebbles. The water filtered by the multi-media filter 6 is divided into three paths through the four-way valve, one of which is transported to the water storage tank Ⅰ19 and used as cooling water to exchange heat with the tail gas generated by the SOFC stack 12 and the reformer 11 to generate hot water, thereby supplying the daily life of the oil field workers. The waste water is used for heating; the second route is transported to the water storage tank 28 as backwash water for the walnut shell filter 5 and the multi-media filter 6. The backwash water and the gas generated by the air compressor 27 simultaneously backwash the walnut shell filter 5 and the multi-media filter 6, thereby ensuring continuous filtration. The waste liquid generated after backwashing is transported to the waste liquid pool 29 through a pipeline; the third route enters the double membrane filter 7, and the remaining inorganic matter, organic matter and microorganisms in the water are removed through the ultrafiltration membrane and the reverse osmosis membrane to obtain pure water, and superheated steam is generated through the evaporator 9, and a part of the superheated steam is mixed with natural gas as a raw material for the hydrogen production reaction of the reformer 11, and another part of the superheated steam is mixed with air as the cathode gas for the SOFC stack 12 reaction.

[0044] The air outlet of the oil-gas-water separation is provided with a blower 21, the air outlet of the blower 21 is provided with a one-way valve 22, and the outlet pipeline of the one-way valve 22 is provided with a three-way valve, one of the outlets of the three-way valve is connected to the burner 10 through a pipeline, and the other outlet is connected to the desulfurization tank 14 through a pipeline, and the air outlet of the desulfurization tank 14 is connected to the gas mixer 16.

[0045] The gas outlet of the gas mixer 16 is connected to the reformer 11 , and a preheater 13 for preheating the reaction gas of the reformer 11 is sequentially arranged between the gas outlet of the gas mixer 16 and the gas inlet of the reformer 11 .

[0046] In the above power generation system, the natural gas separated by the oil-gas-water separator 4 is divided into two parts after passing through the blower 21, one part of the natural gas is transported to the burner 10 by a pipeline as fuel; the other part of the natural gas is desulfurized by the desulfurization tank 14 and enters the following heat exchanger Ⅰ15 for preheating, and then enters the gas mixer 16 with the superheated steam. The two are mixed in the gas mixer 16 and then enter the preheater 13 for preheating. The mixed gas of the preheated natural gas and superheated steam is transported to the reformer 11 by a pipeline for hydrogen production reaction.

[0047] The above-mentioned gas supply device can specifically adopt a blower 21, the air outlet of the blower 21 is provided with a one-way valve 22, and the outlet pipeline of the one-way valve 22 is provided with a three-way valve, one of the outlets of the three-way valve is connected to the burner 10 through a pipeline, and the other outlet is connected to the cathode inlet of the SOFC stack 12 through a pipeline.

[0048] In the above-mentioned power generation system, the air is divided into two parts after passing through the blower 21. One part of the air is directly transported to the burner 10 through a pipeline as an oxidant for catalytic combustion to ensure the heat supply of the reformer 11; the other part of the air is mixed with the superheated steam generated by the evaporator 9, enters the following heat exchanger II 17 for preheating, and enters the SOFC stack 12 as cathode gas to react with the hydrogen generated by the reformer 11 to generate electricity.

[0049] The waste heat recovery unit includes a heat exchanger I 15, a heat exchanger II 17 and a heat exchanger III 18. Among them:

[0050] The heat exchanger I15 is used for heat exchange between natural gas and anode tail gas of SOFC stack 12 to preheat natural gas entering gas mixer 16. The gas outlet of desulfurization tank 14 is connected to the cold material inlet of heat exchanger I15. The gas inlet of gas mixer 16 is connected to the hot material outlet of gas exchanger II. The anode tail gas generated by SOFC stack 12 passes through reformer 11 and evaporator 9 in sequence through pipelines and is connected to the heat medium inlet of heat exchanger I15. That is, the anode tail gas generated by SOFC stack 12 can provide heat for hydrogen production reaction of reformer 11 and heat for evaporator 9 to convert water into superheated steam. Then, the remaining heat of anode tail gas generated by SOFC stack 12 is heat exchanged with natural gas in heat exchanger I15.

[0051] The heat exchanger II 17 is used for heat exchange between the air required for the reaction of the SOFC stack 12 and the cathode tail gas of the SOFC stack 12 and the tail gas of the reformer 11. The gas outlet of the gas supply device is connected to the cold material inlet of the heat exchanger II 17, the cathode inlet of the SOFC stack 12 is connected to the hot material outlet of the heat exchanger II 17, and the cathode tail gas of the SOFC stack 12 and the tail gas of the reformer 11 are connected to the heat medium inlet of the heat exchanger II 17 through pipelines.

[0052] The heat exchanger III18 is used for heat exchange between the water in the water storage tank I19 and the anode tail gas generated by the SOFC stack 12 after the heat exchanger I15, the cathode tail gas of the SOFC stack 12 after the heat exchanger II17, and the tail gas of the reformer 11. The water outlet of the water storage tank I19 is connected to the cold material inlet of the heat exchanger III18, and the hot material outlet of the heat exchanger III18 is connected to the hot water storage container 20. The anode tail gas generated by the SOFC stack 12 after heat exchange in the heat exchanger I15, the cathode tail gas of the SOFC stack 12 after heat exchange in the heat exchanger II17, and the tail gas of the reformer 11 are connected to the heat medium inlet of the heat exchanger III18 through pipelines, and the cooled tail gas after heat exchange is discharged into the atmosphere from the cold medium outlet of the heat exchanger III18.

[0053] The hot water in the hot water storage container 20 can be used for heating the daily life of the oilfield workers, and the cooled exhaust gas can be directly discharged into the atmosphere because it does not contain harmful gases.

[0054] The electric energy generated by the SOFC stack 12 can be converted into 220V AC power through the converter 25, which can be supplied to the electric heating belt of the oil and gas wellbore to achieve wellbore insulation, or can also be used in the daily life of oil and gas well workers.

[0055] It should be noted that some parts not described in the present invention can be implemented by adopting or drawing on existing technologies.

[0056] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A remote oil and gas well gas recovery and power generation system, characterized in that: include: A reformer for converting natural gas steam into hydrogen, a gas mixer for providing reaction gas to the reformer, and a burner for providing heat for the reforming hydrogen production reaction of the reformer; A SOFC stack for reacting hydrogen produced by a reformer to generate electricity; A gas supply device for supplying air required for the reformer and SOFC stack reaction; An oil-gas-water separator used to separate the oil-gas-water mixture extracted from the oil and gas well into oil, natural gas and water, and the separated natural gas and water are used as reaction raw materials for the reformer; A converter for converting the electrical energy of the SOFC stack into alternating current for use in the electric heating cables of the oil and gas wellbore and / or for daily use by oil and gas well workers; The water outlet and the gas outlet of the oil-gas-water separator are connected to the gas inlet of the gas mixer through pipelines, respectively; the gas outlet of the gas mixer is connected to the gas inlet of the reformer; the gas outlet of the oil-gas-water separator and the gas outlet of the gas supply device are connected to the burner through pipelines, respectively; the hydrogen outlet of the reformer and the gas outlet of the gas supply device are connected to the anode inlet and the cathode inlet of the SOFC stack through pipelines, respectively.

2. The remote oil and gas well production gas recovery and power generation system according to claim 1 is characterized in that: The water outlet of the oil-gas-water separator is connected to a walnut shell filter and a multi-media filter in sequence; one end of the water outlet of the multi-media filter is connected in parallel to a water storage tank I and a double-membrane filter respectively; one end of the water outlet of the double-membrane filter is connected to a water storage tank II; the water outlet of the water storage tank II is connected to an evaporator; one end of the steam outlet of the evaporator is connected to a gas mixer; the other end of the steam outlet of the evaporator is connected to the cathode inlet of the SOFC stack after merging with the pipeline of the gas supply device.

3. The remote oil and gas well production gas recovery and power generation system according to claim 1 is characterized in that: A desulfurization tank is arranged between the gas outlet of the oil-gas-water separator and the gas inlet of the gas mixer.

4. The remote oil and gas well production gas recovery and power generation system according to claim 1 is characterized in that: A preheater for preheating the reaction gas of the reformer is arranged between the gas outlet of the gas mixer and the gas inlet of the reformer.

5. The remote oil and gas well production gas recovery and power generation system according to claim 2 is characterized in that: It also includes a waste heat recovery unit, which includes a heat exchanger I for heat exchange between natural gas and anode tail gas of a SOFC stack, the gas outlet of the oil-gas-water separator is connected to the cold material inlet of the heat exchanger I, the gas mixer is connected to the hot material outlet of the gas exchanger II, and the anode tail gas generated by the SOFC stack passes through a reformer and an evaporator in sequence through a pipeline and is connected to the heat medium inlet of the heat exchanger I.

6. The remote oil and gas well production gas recovery and power generation system according to claim 5 is characterized in that: The waste heat recovery unit includes a heat exchanger II for heat exchange between the air required for the SOFC stack reaction and the cathode exhaust gas of the SOFC stack and / or the exhaust gas of the reformer. The air outlet of the air supply device is connected to the cold material inlet of the heat exchanger II, the cathode inlet of the SOFC stack is connected to the hot material outlet of the heat exchanger II, and the cathode exhaust gas of the SOFC stack and / or the exhaust gas of the reformer are connected to the heat medium inlet of the heat exchanger II through a pipeline.

7. A remote oil and gas well production gas recovery and power generation system according to claim 6, characterized in that: The waste heat recovery and utilization unit includes a heat exchanger III for heat exchange between water in a water storage tank I and the anode tail gas generated by the SOFC stack after heat exchanger I and the cathode tail gas of the SOFC stack and / or the tail gas of the reformer after heat exchanger II. The water outlet of the water storage tank I is connected to the cold material inlet of the heat exchanger III, and the hot material outlet of the heat exchanger III is connected to the hot water storage container. The anode tail gas generated by the SOFC stack after heat exchange in the heat exchanger I and the cathode tail gas of the SOFC stack and / or the tail gas of the reformer after heat exchange in the heat exchanger II are connected to the heat medium inlet of the heat exchanger III through a pipeline.

8. The remote oil and gas well production gas recovery and power generation system according to claim 2 is characterized in that: A centrifugal pump is provided on the connecting pipelines between the oil-gas-water separator and the walnut shell filter, between the walnut shell filter and the multi-media filter, and between the multi-media filter and the double membrane filter, and a buffer tank is also provided between the walnut shell filter and the multi-media filter; The walnut shell filter and the multi-media filter are both provided with electrode type liquid level gauges, and the tops of the electrode type liquid level gauges are connected to the electrode type liquid level controllers provided outside the walnut shell filter and the multi-media filter through electric wires.

9. The remote oil and gas well production gas recovery and power generation system according to claim 2, characterized in that: A backwash air inlet and a backwash water inlet are provided at the bottom of the walnut shell filter and the multi-media filter. The backwash air inlets of the walnut shell filter and the multi-media filter are respectively connected to the air compressor through pipelines, and the backwash water inlets at the bottom of the walnut shell filter and the multi-media filter are respectively connected to the water outlet of the water storage tank through pipelines, and the water inlet of the water storage tank is connected to the water outlet of the multi-media filter.

10. The remote oil and gas well production gas recovery and power generation system according to claim 2, characterized in that: The exhaust gas outlets of the walnut shell filter and the multi-media filter are connected to the exhaust gas collecting device through pipelines, and the waste liquid outlets of the walnut shell filter and the multi-media filter are connected to the waste liquid pool through pipelines.

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