Microwave and carbon dioxide-based coal mining methods, systems, and storage media

Abstract

This invention relates to the field of resource extraction technology, and discloses a method, system, and storage medium for coal mining based on microwaves and carbon dioxide. This invention uses surplus renewable energy such as wind and solar power as microwave energy. The microwave generation system has rapid start-up and shutdown, adjustable power, and is adapted to the fluctuations and intermittent nature of wind and solar power. It converts previously wasted wind and solar power into chemical energy for storage, significantly improving the utilization rate of renewable energy and solving the problem of new energy consumption. Furthermore, it eliminates the need for traditional well construction and coal mining processes. By activating deep coal seams in situ using microwaves, it converts difficult-to-mine, high-gas, and thin coal seams into high-value carbon monoxide products, thereby reducing the risk of environmental problems such as surface subsidence and dust pollution, lowering coal mining costs, and improving coal resource utilization.

Description

Technical Field

[0001] This invention relates to the field of resource extraction technology, and in particular to a method, system and storage medium for coal mining based on microwave and carbon dioxide. Background Technology

[0002] Currently, deep coal resource gasification and liquefaction mining are still in the research and demonstration stage. Among them, underground coal gasification (UCG) technology is relatively mature and has been demonstrated in some industrial settings. Underground coal gasification involves burning and gasifying underground coal into coal gas within the coal seam, which is then transported to the surface as an energy source or chemical feedstock. It is particularly suitable for coal seams that are unmineable or uneconomical to mine using conventional methods, as well as for secondary or multiple mining operations in coal mines. This technology utilizes roadways or wells to create a reaction space within the coal seam. By igniting and burning the coal seam, a high-temperature reaction chamber is constructed, allowing the coal to react with oxygen and water to produce products such as methane, hydrogen, carbon monoxide, and carbon dioxide. The coal gas is then extracted in a manner similar to natural gas extraction.

[0003] However, existing underground coal gasification technologies have many technical shortcomings. In terms of technology, the construction process of the gasifier cannot guarantee reliability throughout its entire lifecycle, and the gasification operation control process cannot guarantee stable crude gas production and gasification efficiency. Regarding economics and energy consumption, the crude gas produced by existing coal seam mining methods has a low calorific value, significant heat loss, and contains a large amount of carbon dioxide, which is detrimental to the low-carbon development of the technology. Furthermore, its economic cost is difficult to compete with traditional natural gas, and it also consumes a large amount of water resources. In terms of environmental pollution, shallow UCG experiments have revealed environmental problems such as near-surface freshwater pollution, surface subsidence, and gas escape. Summary of the Invention

[0004] The technical problem solved by this invention is to provide a method, system and storage medium for coal mining based on microwave and carbon dioxide, which helps to solve the technical problems of energy waste, high difficulty in coal mining and low carbon dioxide utilization in existing deep coal mining technologies.

[0005] In a first aspect, the present invention provides a coal mining system based on microwave and carbon dioxide, comprising: Construct a power collection system, a power processing and energy storage system, a microwave generation system, a gas collection and processing system, and a gas storage and transmission system on the ground surface; drill at least one microwave transmission hole and at least one gas extraction hole in the underground coal seam area; The power processing and energy storage system is electrically connected to the power collection system; the microwave generating system is electrically connected to the power processing and energy storage system, and the microwave generating system includes a microwave transmission antenna disposed within the microwave transmission port; the gas collection and processing system includes a gas delivery pipeline disposed within the gas extraction port; the gas storage and transmission system is connected to the gas collection and processing system.

[0006] In some optional embodiments, the gas delivery pipeline is equipped with an inductive shut-off valve and a gas sensor; the inductive shut-off valve is used to control the opening degree of the gas delivery pipeline; the gas sensor is electrically connected to the inductive shut-off valve and is used to detect the carbon dioxide content in the gas delivery pipeline.

[0007] Secondly, the present invention also provides a microwave and carbon dioxide-based coal mining method, applied to the microwave and carbon dioxide-based coal mining system described above. The coal mining system includes a power collection system, a power processing and energy storage system, a microwave generation system, a gas collection and processing system, and a gas storage and transmission system built on the surface. At least one microwave transmission hole and at least one gas extraction hole are drilled in the underground coal seam area. The power processing and energy storage system is electrically connected to the power collection system. The microwave generation system is electrically connected to the power processing and energy storage system. The microwave generation system includes a microwave transmission antenna disposed within the microwave transmission hole. The gas collection and processing system includes a gas delivery pipeline disposed within the gas extraction hole. The gas storage and transmission system is connected to the gas collection and processing system. The coal mining method includes: The coal seam area is subjected to hydraulic fracturing to form fractures, so that the microwave transmission hole and the gas extraction hole are interconnected through the fractures. The coal seam region with the aforementioned fractures is pretreated; Carbon dioxide is continuously injected into the pretreated coal seam region through the microwave transmission hole. Under the action of microwave, the carbon dioxide is controlled to undergo a reduction reaction with the coal-based carbon materials in the coal seam region to generate carbon monoxide. The mixed gas of carbon monoxide and carbon dioxide is transported to the gas collection and treatment system, and after being processed by the gas collection and treatment system, carbon monoxide and carbon dioxide are obtained respectively. The carbon dioxide is then transported to the gas storage and transmission system.

[0008] In some optional embodiments, the gas delivery pipeline is equipped with an inductive shut-off valve and a gas sensor; the inductive shut-off valve is used to control the opening degree of the gas delivery pipeline; the gas sensor is electrically connected to the inductive shut-off valve and is used to detect the carbon dioxide content in the gas delivery pipeline. The coal mining method also includes: The carbon dioxide content flowing through the gas delivery pipeline is detected, and it is determined whether the carbon dioxide content exceeds a first target value. If the carbon dioxide content exceeds the first target value, a carbon dioxide content exceeding the standard signal is generated, and the opening degree of the inductive closing valve is reduced based on the exceeding the standard signal; The excessive signal is transmitted to the microwave generating system, and the output power of the microwave generating system is increased.

[0009] In some optional embodiments, the coal mining method further includes: If the output power of the power processing and energy storage system is continuously lower than the minimum input power of the microwave generating system or the reaction efficiency of the coal seam region is lower than a preset threshold, the injection of carbon dioxide into the microwave transmission hole shall be stopped. Inert gas is injected into the microwave transmission port to purge the coal seam area, and the microwave generating system is shut down; After the coal seam region cools to room temperature, carbon dioxide is injected and the microwave generating system is restarted to continue the reduction reaction in the coal seam region; or, By sealing the microwave transmission hole and the gas extraction hole, the resource conversion in the coal seam area is completed.

[0010] In some alternative embodiments, the pretreatment of the coal seam region having the fractures includes: The microwave generating system converts electrical energy into microwaves, and the microwaves are then transmitted into the coal seam region via the microwave transmission antenna. The coal-based carbon material in the coal seam region absorbs the microwaves, forming local hot spots in the coal seam region, while controlling the overall temperature of the coal seam region within the target temperature range.

[0011] In some optional embodiments, the coal mining method further includes: During the reduction reaction, the input power of the microwave generating system is detected; If the input power of the microwave generating system is less than the first target power value, the output power of the power processing and energy storage system is increased. If the input power of the microwave generating system is greater than the second target power value, the output power of the power processing and energy storage system is reduced.

[0012] In some optional embodiments, after fracturing the coal seam region to form fractures, allowing the microwave transmission port and the gas extraction port to communicate with each other through the fractures, the process includes: Carbon dioxide is continuously injected into the coal seam region through the microwave transmission hole, and the carbon dioxide is controlled to fill the fractures and the gas extraction hole, while the oxygen content in the coal seam region is controlled within the target range.

[0013] Thirdly, the present invention also provides an electronic device, comprising: a memory, a processor, a communication interface, and a communication bus, wherein the processor, the memory, and the communication interface communicate with each other through the communication bus; The memory is used to store at least one executable instruction that causes the processor to perform the microwave and carbon dioxide-based coal mining method as described above.

[0014] Fourthly, the present invention also provides a computer-readable storage medium storing computer instructions for causing a processor to execute and implement the microwave and carbon dioxide-based coal mining method as described above.

[0015] In summary, this invention provides a microwave-based coal mining method, system, and storage medium using surplus renewable energy such as wind and solar power as microwave energy. The microwave generation system features rapid start-up and shutdown, adjustable power, and adaptability to the fluctuations and intermittent nature of wind and solar power. It converts previously wasted wind and solar power into chemical energy for storage, significantly improving the utilization rate of renewable energy and solving the problem of new energy consumption. Furthermore, it eliminates the need for traditional well construction and coal mining processes. By activating deep coal seams in situ using microwaves, it transforms difficult-to-mine, high-gas, and thin coal seams into high-value carbon monoxide products, thereby reducing the risk of environmental problems such as surface subsidence and dust pollution, lowering coal mining costs, and increasing coal resource utilization. By using industrially captured carbon dioxide as a reaction raw material to replace traditional oxidants, it not only consumes industrial waste carbon but also converts it into high-value carbon monoxide products, rather than simply storing it. This achieves closed-loop utilization of carbon dioxide, reduces carbon emissions, constructs a negative carbon cycle system, and aligns with the low-carbon development strategy. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a coal mining system based on microwave and carbon dioxide according to an embodiment of the present invention; Figure 2 This is a schematic flowchart of a coal mining method based on microwave and carbon dioxide according to an embodiment of the present invention. Figure 3 This is a schematic flowchart of a coal mining method based on microwave and carbon dioxide according to another embodiment of the present invention. Figure 4 This is a schematic flowchart of a coal mining method based on microwave and carbon dioxide according to another embodiment of the present invention. Figure 5 This is a schematic flowchart of a coal mining method based on microwave and carbon dioxide according to another embodiment of the present invention. Figure 6 This is a schematic flowchart of a coal mining method based on microwave and carbon dioxide according to another embodiment of the present invention. Figure 7 This is a schematic diagram of the structure of an electronic device according to an embodiment of the present invention.

[0018] Figure label: 10. Coal seam area; 11. Microwave transmission port; 12. Gas extraction port; 121. Inductive closing valve; 100. Power collection system; 200. Power processing and energy storage system; 300. Microwave generation system; 310. Microwave transmission antenna; 400. Gas collection and processing system; 500. Gas storage and transmission system. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] According to embodiments of the present invention, such as Figure 1 As shown, a coal mining system based on microwave and carbon dioxide is provided, including: a power collection system 100, a power processing and energy storage system 200, a microwave generation system 300, a gas collection and processing system 400, and a gas storage and transmission system 500 built on the ground surface; at least one microwave transmission hole 11 and at least one gas extraction hole are drilled in the underground coal seam area 10; the power processing and energy storage system 200 is electrically connected to the power collection system 100; the microwave generation system 300 is electrically connected to the power processing and energy storage system 200, and the microwave generation system 300 includes a microwave transmission antenna 310, which is disposed in the microwave transmission hole 11; the gas collection and processing system 400 includes a gas delivery pipeline, which is disposed in the gas extraction hole; the gas storage and transmission system 500 is connected to the gas collection and processing system 400.

[0022] In this embodiment, a power harvesting system 100, a power processing and energy storage system 200, a microwave generation system 300, a gas harvesting and processing system 400, and a gas storage and transmission system 500 are constructed on the ground. The power harvesting system 100 is used to collect electrical energy generated by wind farms and photovoltaic power plants, and then rectify and filter the collected electrical energy; wherein, excess wind and solar power is directly transmitted to the power processing and energy storage system 200 as energy for microwave generation.

[0023] The power processing and energy storage system 200 is electrically connected to the power harvesting system 100 to convert unstable alternating current into stable direct current required by the microwave generating system 300. It also incorporates a small energy storage device to smooth power fluctuations in the microwave generating system 300. Based on real-time output power fluctuations, the small energy storage device can supplement or store energy to dynamically adjust the input power of the microwave generating system 300. If the input power of the microwave generating system 300 is less than a first target power value, supplementary energy can be provided through the small energy storage device to increase the input power; conversely, if the input power is greater than a second target power value, energy can be stored through the small energy storage device to reduce the input power.

[0024] The microwave generating system 300 is electrically connected to the power processing and energy storage system 200. The microwave generating system 300 converts the electrical energy transmitted by the power processing and energy storage system 200 into microwaves. The microwave generating system 300 includes a microwave transmission antenna 310, which is disposed within a microwave transmission aperture 11. Microwaves are transmitted to the coal seam region 10 through the microwave transmission antenna 310. Simultaneously, carbon dioxide is also transmitted to the coal seam region 10 through the microwave transmission aperture 11. Under the action of the microwaves, the carbon dioxide undergoes a reduction reaction with the coal-based carbonaceous materials in the coal seam region 10, generating carbon monoxide.

[0025] The gas collection and treatment system 400 includes a gas delivery pipeline installed inside the gas extraction hole. The gas generated after the reaction in the coal seam area 10 can be transported to the gas collection and treatment system 400 through the gas delivery pipeline. The gas is then treated by the gas collection and treatment system 400 through condensation, dehydration, dust removal, and purification to obtain high-purity carbon monoxide. High-purity carbon monoxide can be used as fuel and syngas feedstock to produce chemical products such as methanol, synthetic natural gas, and hydrogen, thus realizing resource utilization.

[0026] The gas storage and transmission system 500 is connected to the gas collection and treatment system 400. In the mixed gas after being processed by the gas collection and treatment system 400, the unreacted carbon dioxide is separated and circulated back to the gas storage and transmission system 500 so that it can be injected into the coal seam area 10 again through the microwave transmission hole 11 to participate in the reaction, thereby improving the utilization rate of carbon dioxide.

[0027] Furthermore, the power harvesting system 100 may include a wind power harvesting device and a photovoltaic harvesting device. The wind power harvesting device uses a horizontal axis wind turbine, and the photovoltaic harvesting device uses a monocrystalline silicon solar panel. The horizontal axis wind turbine and the monocrystalline silicon solar panel can efficiently harvest wind and solar energy. The power processing and energy storage system 200 may include a rectifier and filter device and an energy storage device. The rectifier and filter device uses a full-wave rectifier circuit and a capacitor filter circuit, and the energy storage device uses a lithium battery, which can effectively store electrical energy. The microwave generation system 300 includes a microwave generator that can generate microwave frequencies suitable for coal seam activation. The gas harvesting and processing system 400 includes a condensation and dehydration device, a dust removal device, and a purification device.

[0028] This invention utilizes surplus renewable energy, such as wind and solar power, as microwave energy. The microwave generation system (300W) features rapid start-up and shutdown, adjustable power, and adaptability to the fluctuations and intermittent nature of wind and solar power. It converts previously wasted wind and solar power into chemical energy for storage, significantly improving renewable energy utilization and solving the problem of new energy consumption. Furthermore, it eliminates the need for traditional well construction and coal mining processes. By activating deep coal seams in situ using microwaves, it transforms difficult-to-mine, high-gas, and thin coal seams into high-value carbon monoxide products, thereby reducing the risk of environmental problems such as surface subsidence and dust pollution, lowering coal mining costs, and increasing coal resource utilization. By using industrially captured carbon dioxide as a reaction raw material to replace traditional oxidants, it not only consumes industrial waste carbon but also converts it into high-value carbon monoxide products, rather than simply storing it. This achieves closed-loop utilization of carbon dioxide, reduces carbon emissions, and constructs a negative carbon cycle system, aligning with the low-carbon development strategy.

[0029] In one embodiment, the gas delivery pipeline is equipped with an inductive shut-off valve 121 and a gas sensor; the inductive shut-off valve 121 is used to control the opening degree of the gas delivery pipeline; the gas sensor is electrically connected to the inductive shut-off valve 121 and is used to detect the carbon dioxide content in the gas delivery pipeline.

[0030] In this embodiment, the inductive shut-off valve 121 can be installed at one end of the gas delivery pipeline near the gas inlet, and a gas sensor is installed between the inductive shut-off valve 121 and the gas inlet. The gas sensor is electrically connected to the inductive shut-off valve 121. The gas sensor detects the carbon dioxide content in the gas delivery pipeline, controlling the opening degree of the inductive shut-off valve 121, thereby controlling the opening degree of the gas delivery pipeline. The inductive shut-off valve 121 can be an electric ball valve for flexible control of the gas delivery pipeline opening. The gas sensor can be an infrared gas sensor, capable of accurately detecting the carbon dioxide content in the mixed gas.

[0031] Specifically, when the carbon dioxide content is too high, the gas sensor detects that the carbon dioxide has not fully reacted. It then transmits this signal to the control system, which in turn controls the inductive closing valve 121 to partially close, reducing the gas collection speed from the gas delivery pipeline and increasing the residence time of carbon dioxide in the coal seam area 10. This increases the duration of the reduction reaction, thereby improving the conversion rate of carbon dioxide and the concentration of carbon monoxide generated. The signal indicating excessive carbon dioxide content is further transmitted to the ground and fed back to the microwave generating system 300. The output power of the microwave generating system 300 is then increased, raising the temperature in the coal seam area 10 and promoting the reduction reaction. The gas sensor continuously monitors changes in carbon dioxide concentration. Once the carbon dioxide concentration returns to a normal range, the opening of the inductive closing valve 121 is gradually restored to its normal open state.

[0032] According to embodiments of the present invention, such as Figure 2 As shown, a method for coal mining based on microwave and carbon dioxide is provided, including the following steps: Step S100: Perform hydraulic fracturing on the coal seam region 10 to form fractures, so that the microwave transmission hole 11 and the gas extraction hole are interconnected through the fractures.

[0033] In step S100, specifically, after constructing a power collection system 100, a power processing and energy storage system 200, a microwave generation system 300, a gas collection and processing system 400, and a gas storage and transmission system 500 on the surface, at least one microwave transmission hole 11 and at least one gas extraction hole are drilled in the underground coal seam region 10. Then, fracturing fluid is introduced into the microwave transmission hole 11 and the gas extraction hole for non-directional fracturing, thereby forming fractures in the deep coal seam region 10. These fractures allow the microwave transmission hole 11 and the gas extraction hole to communicate with each other, facilitating subsequent gas flow and reaction.

[0034] After step S100, the method further includes: continuously injecting carbon dioxide into the coal seam region 10 based on the microwave transmission hole 11, controlling the carbon dioxide to fill the fractures and gas extraction holes, and controlling the oxygen content in the coal seam region 10 within the target content range.

[0035] Specifically, carbon dioxide is continuously injected into the coal seam region 10 through the microwave transmission hole 11, so that the carbon dioxide is transmitted through the fracture to the gas extraction hole to purge the air in the coal seam region 10, thereby filling the fracture and gas extraction hole with carbon dioxide, ensuring that the oxygen content in the coal seam region 10 is controlled within the target range, such as making the oxygen content in the coal seam region 10 less than or equal to 0.1%, so that the coal seam region 10 is close to an oxygen-free environment, providing a safe reaction environment for the subsequent reduction reaction, and eliminating safety hazards such as carbon monoxide explosion and spontaneous combustion of coal.

[0036] Step S200: Pre-process the coal seam region 10 with fractures.

[0037] In step S200, as Figure 3 As shown, it includes the following steps: Step S210: Based on the microwave generator system 300, electrical energy is converted into microwaves, and the microwaves are introduced into the coal seam region 10 through the microwave transmission antenna 310. In step S220, the coal-based carbon material in the coal seam region 10 absorbs microwaves, forming local hot spots within the coal seam region 10, while simultaneously controlling the overall temperature of the coal seam region 10 within the target temperature range.

[0038] Specifically, on the surface, electrical energy is converted into microwaves by a microwave generating system 300, and then the generated microwaves are introduced into the deep underground coal seam region 10 through a microwave transmission antenna 310, thereby releasing microwaves into the coal seam region 10. Utilizing the strong wave absorption characteristics of the coal-based carbon materials in the coal seam region 10, the microwave energy is rapidly absorbed by the coal seam region 10, forming local hot spots within the coal seam region 10, and controlling the temperature of these hot spots at 800℃-1100℃; at the same time, the overall temperature of the coal seam region 10 is controlled within a target temperature range, for example, 600℃-750℃, thereby achieving in-situ activation of the coal seam region 10.

[0039] By utilizing the physical properties of microwave heating, microwaves selectively heat coal-based carbon materials, achieving a temperature environment with localized high temperatures and overall controllable temperature in the coal seam region 10. This allows energy to be concentrated in the localized hot spot region. Not only can the pretreatment task of the coal seam region 10 be completed with minimal energy consumption, but it also provides sufficient physical and chemical preparation for the subsequent reduction reaction.

[0040] Step S300: Carbon dioxide is continuously injected into the pretreated coal seam region 10 through microwave transmission hole 11. Under the action of microwave, the carbon dioxide is controlled to undergo a reduction reaction with the coal-based carbon material in the coal seam region 10 to generate carbon monoxide.

[0041] In step S300, industrially captured carbon dioxide is continuously injected into the activated deep coal seam region 10 through microwave transmission holes 11 via the gas storage and transmission system 500. Under the action of microwaves, the carbon dioxide reacts with the activated coal-based carbon material to generate carbon monoxide. The reaction equation is as follows: By conducting the reduction reaction in local hot spots, the efficiency of the reduction reaction is effectively improved, so as to achieve a high conversion rate of carbon dioxide and a high concentration of carbon monoxide generated. Moreover, during the reaction, the amount of carbon dioxide injected and the rate of the reduction reaction can be adjusted to make the conversion rate of carbon dioxide greater than or equal to 95% and the concentration of carbon monoxide generated greater than or equal to 90%.

[0042] Furthermore, such as Figure 4 As shown, it also includes the following steps: Step S310: During the reduction reaction, the input power of the microwave generating system 300 is detected; Step S320: If the input power of the microwave generating system 300 is less than the first target power value, control the output power of the power processing and energy storage system 200 to increase; Step S330: If the input power of the microwave generating system 300 is greater than the second target power value, control the output power of the power processing and energy storage system 200 to decrease.

[0043] Specifically, the microwave generating system 300 also has a power detection unit. During the reduction reaction, the power detection unit can detect the input power of the microwave generating system 300 and determine whether the input power is within the set input power range, such as 500W-50kW, to meet the power requirements of microwave heating. If the input power of the microwave generating system 300 is less than the first target power value, such as less than 500W, it can be supplemented by a small energy storage device, controlling the output power of the power processing and energy storage system 200 to increase the input power of the microwave generating system 300. If the input power of the microwave generating system 300 is greater than the second target power value, such as greater than 50kW, it can be stored by a small energy storage device, controlling the output power of the power processing and energy storage system 200 to decrease the input power of the microwave generating system 300.

[0044] When the output power of the power processing and energy storage system 200 fluctuates, it can supplement or store energy to ensure that the input power of the microwave generating system 300 is stable at 500W-50kW, thereby making full use of fluctuating wind and solar power while ensuring the stable operation of the microwave generating system 300.

[0045] Step S400: The mixed gas of carbon monoxide and carbon dioxide is transferred to the gas collection and treatment system 400, and after being processed by the gas collection and treatment system 400, carbon monoxide and carbon dioxide are obtained respectively. The carbon dioxide is then transferred to the gas storage and transmission system 500.

[0046] In step S400, after carbon dioxide undergoes a reduction reaction at a local hot spot in the coal seam region 10, the generated carbon monoxide mixes with the unreacted carbon dioxide to form a mixed gas. This mixed gas is then transported to the gas collection and treatment system 400 via a gas transmission pipeline. In the gas collection and treatment system 400, the collected mixed gas undergoes condensation, dehydration, dust removal, and purification processes to obtain high-purity carbon monoxide and unreacted carbon dioxide. The unreacted carbon dioxide is then transferred to the gas storage and transmission system 500, so that it can be injected back into the coal seam region 10 through the microwave transmission port 11 to participate in the reaction, thereby improving the utilization rate of carbon dioxide.

[0047] In one embodiment, such as Figure 5 As shown, the coal mining method further includes the following steps: Step S410: Detect the carbon dioxide content in the gas delivery pipeline and determine whether the carbon dioxide content exceeds the first target value; Step S420: When the carbon dioxide content exceeds the first target value, a carbon dioxide content exceeding the standard signal is generated, and the opening degree of the inductive closing valve 121 is reduced based on the exceeding the standard signal. Step S430: Transmit the excessive signal to the microwave generator system 300 and control the output power of the microwave generator system 300 to increase.

[0048] Specifically, a gas sensor detects the carbon dioxide content in the mixed gas flowing through the gas delivery pipeline to determine if it exceeds a first target value. If the carbon dioxide content is too high, exceeding the first target value, it indicates insufficient carbon dioxide reaction, generating a carbon dioxide exceeding the limit signal. This signal is then transmitted to the control system, which reduces the opening of the inductive closing valve 121, decreasing the gas collection speed from the gas delivery pipeline and increasing the residence time of carbon dioxide in the coal seam area 10. This increases the duration of the reduction reaction, thereby improving the carbon dioxide conversion rate and the concentration of carbon monoxide generated. The exceeding signal is further transmitted to the ground and fed back to the microwave generating system 300. The output power of the microwave generating system 300 is then increased, raising the temperature in the coal seam area 10 and promoting the reduction reaction. The gas sensor continuously monitors changes in carbon dioxide concentration. Once the carbon dioxide concentration returns to the normal range, the opening of the inductive closing valve 121 is gradually restored to its normal open state.

[0049] In one embodiment, such as Figure 6 As shown, the coal mining method further includes the following steps: Step S510: If the output power of the power processing and energy storage system 200 is continuously lower than the minimum input power of the microwave generating system 300 or the reaction efficiency of the coal seam region 10 is lower than a preset threshold, stop injecting carbon dioxide into the microwave transmission hole 11. Step S520: Inject inert gas into microwave transmission hole 11 to purge coal seam area 10, and turn off microwave generation system 300; Step S521: After the coal seam region 10 is cooled to room temperature, carbon dioxide is injected and the microwave generator system 300 is restarted to continue the reduction reaction in the coal seam region 10. Step S522: Seal the microwave transmission hole 11 and the gas extraction hole 12 to complete the conversion of resources in the coal seam area 10.

[0050] Specifically, the output power of the power processing and energy storage system 200 is obtained. If the output power of the power processing and energy storage system 200 is continuously lower than the minimum input power of the microwave generating system 300, it indicates that the electrical energy of the power processing and energy storage system 200 does not meet the usage requirements of the microwave generating system 300, and thus does not meet the reduction reaction conditions at the coal seam region 10; or the reaction efficiency of the coal seam region 10 is lower than the preset threshold, such as the carbon dioxide conversion rate being less than 80%. In this case, it is necessary to stop injecting carbon dioxide into the microwave transmission hole 11 to terminate the reduction reaction of the coal seam region 10.

[0051] Then, inert gas is injected into the microwave transmission port 11 to purge the coal seam region 10, and the microwave generating system 300 is shut down. The inert gas can be argon or nitrogen, and the purging time for the coal seam region 10 is 15-30 minutes to fully expel the carbon monoxide within the coal seam region 10 to the gas collection and treatment system 400. After the coal seam region 10 cools to room temperature, nitrogen dioxide can be injected back into the coal seam region 10 through the microwave transmission port 11, and the microwave generating system 300 can be restarted to further carry out the reduction reaction and reduce the carbon resources within the coal seam region 10. If the reaction in the coal seam region 10 is complete, the microwave transmission port 11 and the gas extraction port 12 can be sealed to complete the conversion of resources in the coal seam region 10.

[0052] In summary, the microwave and carbon dioxide-based coal mining method provided by this invention uses surplus renewable energy such as wind and solar power as microwave energy. The microwave generation system 300 features rapid start-up and shutdown, adjustable power, and adaptability to the fluctuations and intermittent nature of wind and solar power. It converts previously wasted wind and solar power into chemical energy for storage, significantly improving the utilization rate of renewable energy and solving the problem of new energy consumption. Moreover, it eliminates the need for traditional well construction and coal mining processes. By activating deep coal seams in situ with microwaves, it transforms difficult-to-mine coal resources, such as those that are difficult to mine, high in gas, or thin, into high-value carbon monoxide products. This reduces the risk of environmental problems such as surface subsidence and dust pollution, lowers coal mining costs, and improves coal resource utilization. By using industrially captured carbon dioxide as a reaction raw material to replace traditional oxidants, it not only consumes industrial waste carbon but also converts it into high-value carbon monoxide products, rather than simply storing it. This achieves closed-loop utilization of carbon dioxide, reduces carbon emissions, and constructs a negative carbon cycle system, aligning with the low-carbon development strategy.

[0053] Figure 7 The diagram shows a structural schematic of an embodiment of an electronic device provided by the present invention. The specific embodiments of the present invention do not limit the specific implementation of the electronic device.

[0054] like Figure 7As shown, the electronic device may include: a processor 1002, a communications interface 1004, a memory 1006, and a communications bus 1008.

[0055] The processor 1002, communication interface 1004, and memory 1006 communicate with each other via communication bus 1008. Communication interface 1004 is used to communicate with other network elements, such as clients or other servers. The processor 1002 executes program 1010, specifically performing the relevant steps described in the embodiments of the microwave and carbon dioxide-based coal mining method.

[0056] Specifically, program 1010 may include program code, which includes computer-executable instructions.

[0057] The processor 1002 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention. The electronic device includes one or more processors, which may be processors of the same type, such as one or more CPUs; or they may be processors of different types, such as one or more CPUs and one or more ASICs.

[0058] Memory 1006 is used to store program 1010. Memory 1006 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0059] Specifically, program 1010 can be called by processor 1002 to cause electronic equipment to perform the relevant steps in the above embodiments of the method for coal mining based on microwave and carbon dioxide.

[0060] Those skilled in the art will understand that Figure 7 The structure shown is for illustrative purposes only and does not limit the structure of the aforementioned device. For example, electronic devices may also include components that are more... Figure 7 The more or fewer components shown, or having the same Figure 7 The different configurations shown.

[0061] This invention also provides a computer-readable storage medium. The methods described above according to embodiments of the invention can be implemented in hardware or firmware, or implemented as computer code that can be recorded on a storage medium, or implemented as computer code downloaded via a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and then stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that computers, processors, microprocessor controllers, or programmable hardware include storage components capable of storing or receiving software or computer code, which, when accessed and executed by the computer, processor, or hardware, implements the methods shown in the above embodiments.

[0062] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0063] The specific embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A coal mining system based on microwave and carbon dioxide, characterized in that, include: A power collection system (100), a power processing and energy storage system (200), a microwave generation system (300), a gas collection and processing system (400), and a gas storage and transmission system (500) are constructed on the ground surface; at least one microwave transmission hole (11) and at least one gas extraction hole are drilled in the underground coal seam area (10); The power processing and energy storage system (200) is electrically connected to the power collection system (100); the microwave generating system (300) is electrically connected to the power processing and energy storage system (200), the microwave generating system (300) includes a microwave transmission antenna (310), the microwave transmission antenna (310) is disposed in the microwave transmission hole (11); the gas collection and processing system (400) includes a gas delivery pipe, the gas delivery pipe is disposed in the gas extraction hole; the gas storage and transmission system (500) is connected to the gas collection and processing system (400).

2. The microwave and carbon dioxide-based coal mining system according to claim 1, characterized in that, The gas delivery pipeline is equipped with an inductive shut-off valve (121) and a gas sensor; the inductive shut-off valve (121) is used to control the opening degree of the gas delivery pipeline; the gas sensor is electrically connected to the inductive shut-off valve (121) and is used to detect the carbon dioxide content in the gas delivery pipeline.

3. A coal mining method based on microwave and carbon dioxide, characterized in that, An application is made to a microwave and carbon dioxide-based coal mining system as described in any one of claims 1-2, the coal mining system comprising a power collection system (100), a power processing and energy storage system (200), a microwave generation system (300), a gas collection and processing system (400), and a gas storage and transmission system (500) built on the surface; at least one microwave transmission hole (11) and at least one gas extraction hole are drilled in the underground coal seam area (10); the power processing and energy storage system (200) is electrically connected to the power collection system (100); the microwave generation system (300) is electrically connected to the power processing and energy storage system (200), the microwave generation system (300) includes a microwave transmission antenna (310), the microwave transmission antenna (310) is disposed in the microwave transmission hole (11); the gas collection and processing system (400) includes a gas delivery pipe, the gas delivery pipe is disposed in the gas extraction hole; the gas storage and transmission system (500) is connected to the gas collection and processing system (400); The coal mining method includes: The coal seam area is subjected to hydraulic fracturing to form fractures, so that the microwave transmission hole and the gas extraction hole are interconnected through the fractures. The coal seam region with the aforementioned fractures is pretreated; Carbon dioxide is continuously injected into the pretreated coal seam region through the microwave transmission hole. Under the action of microwave, the carbon dioxide is controlled to undergo a reduction reaction with the coal-based carbon materials in the coal seam region to generate carbon monoxide. The mixed gas of carbon monoxide and carbon dioxide is transported to the gas collection and treatment system, and after being processed by the gas collection and treatment system, carbon monoxide and carbon dioxide are obtained respectively. The carbon dioxide is then transported to the gas storage and transmission system.

4. The coal mining method based on microwave and carbon dioxide according to claim 3, characterized in that, The gas delivery pipeline is equipped with an inductive shut-off valve (121) and a gas sensor; the inductive shut-off valve (121) is used to control the opening degree of the gas delivery pipeline; the gas sensor is electrically connected to the inductive shut-off valve (121) and is used to detect the carbon dioxide content in the gas delivery pipeline. The coal mining method also includes: The carbon dioxide content in the gas delivery pipeline is detected, and it is determined whether the carbon dioxide content exceeds a first target value. If the carbon dioxide content exceeds the first target value, a carbon dioxide content exceeding the standard signal is generated, and the opening degree of the inductive closing valve is reduced based on the exceeding the standard signal; The excessive signal is transmitted to the microwave generating system, and the output power of the microwave generating system is increased.

5. The coal mining method based on microwave and carbon dioxide according to claim 3, characterized in that, The coal mining method also includes: If the output power of the power processing and energy storage system is continuously lower than the minimum input power of the microwave generating system or the reaction efficiency of the coal seam region is lower than a preset threshold, the injection of carbon dioxide into the microwave transmission hole shall be stopped. Inert gas is injected into the microwave transmission port to purge the coal seam area, and the microwave generating system is shut down; After the coal seam region cools to room temperature, carbon dioxide is injected and the microwave generating system is restarted to continue the reduction reaction in the coal seam region; or, By sealing the microwave transmission hole and the gas extraction hole, the resource conversion in the coal seam area is completed.

6. The coal mining method based on microwave and carbon dioxide according to claim 3, characterized in that, The pretreatment of the coal seam region with the fractures includes: The microwave generating system converts electrical energy into microwaves, and the microwaves are transmitted into the coal seam region via the microwave transmission antenna. The coal-based carbon material in the coal seam region absorbs the microwaves, forming local hot spots in the coal seam region, while controlling the overall temperature of the coal seam region within the target temperature range.

7. The coal mining method based on microwave and carbon dioxide according to claim 3, characterized in that, The coal mining method also includes: During the reduction reaction, the input power of the microwave generating system is detected; If the input power of the microwave generating system is less than the first target power value, the output power of the power processing and energy storage system is increased. If the input power of the microwave generating system is greater than the second target power value, the output power of the power processing and energy storage system is reduced.

8. The coal mining method based on microwave and carbon dioxide according to claim 3, characterized in that, The process of fracturing the coal seam area to form fractures, allowing the microwave transmission port and the gas extraction port to communicate with each other through the fractures, includes: Carbon dioxide is continuously injected into the coal seam region through the microwave transmission hole, and the carbon dioxide is controlled to fill the fractures and the gas extraction hole, while the oxygen content in the coal seam region is controlled within the target range.

9. An electronic device, characterized in that, include: The system includes a memory, a processor, a communication interface, and a communication bus, wherein the processor, the memory, and the communication interface communicate with each other via the communication bus. The memory is used to store at least one executable instruction that causes the processor to perform the microwave and carbon dioxide-based coal mining method as described in any one of claims 3-8.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the microwave and carbon dioxide-based coal mining method according to any one of claims 3-8.

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