Semi-coke treatment system and method for stable combustion coupling aluminum fuel energy storage of coal-fired unit

Abstract

The embodiment of the invention provides a coal-fired unit stable combustion coupling aluminum fuel energy storage semicoke treatment system and method, in the system, an Al2O3 electrolyzer supplies power through a renewable energy power generation device, and an anode outlet of the Al2O3 electrolyzer is connected with an inlet of a condenser; an inlet and an outlet of the first gas mixer are respectively connected with a first outlet of the condenser and an inlet of the oxygen-enriched air storage tank, an inlet and an outlet of the coal mill are respectively connected with a first outlet of the oxygen-enriched air storage tank and an inlet of the semi-gasification burner, and an outlet of the semi-gasification burner is connected with a nozzle of the semi-coke burner; semi-coke fuel is crushed by the coal mill and then is fed into the semi-gasification combustor by taking oxygen-enriched air in the oxygen-enriched air storage tank as gasification background gas for stable combustion. According to the system, a coal-fired power plant, new energy power generation, coal-based solid waste utilization and the ecological restoration field are combined, the utilization rate of the coal-based solid waste is increased, the application field of the coal-based solid waste is expanded, a multi-element coupled energy system is constructed, and carbon emission is reduced.

Description

Technical Field

[0001] The disclosed embodiments belong to the technical field of coal-fired power generation, and specifically relate to a semi-coke disposal system and method for coal-fired units with stable combustion coupled with aluminum fuel energy storage. Background Art

[0002] As the proportion of renewable energy generation continues to increase, coal-fired units are facing more and more frequent peak-shaving needs. However, when coal-fired units are operating at low loads, they generally have problems such as unstable combustion, reduced efficiency, and increased pollutant emissions. In order to solve these problems, a variety of solutions have been proposed in the prior art, such as:

[0003] Oxygen-enriched combustion technology: Increase the oxygen concentration at the burner outlet and enhance combustion stability, but there are problems such as high oxygen production cost and complex system.

[0004] Plasma ignition technology: uses plasma high temperature to ignite coal powder and improve combustion stability under low load, but there are problems such as large equipment investment and high operation and maintenance costs.

[0005] Biomass co-firing technology: Biomass is mixed with coal powder for combustion to improve combustion efficiency, but there are problems such as limited biomass resources and high fuel pretreatment costs.

[0006] On the other hand, aluminum fuel, as a new type of fuel with high energy density, cleanness and no pollution, has received extensive attention in recent years. After burning, aluminum fuel mainly produces alumina, which can be recycled to achieve a circular economy.

[0007] In addition, with the development of my country's coal chemical industry, a large amount of semi-coke will be produced. Lump semi-coke can be recycled as a chemical product, while powdered semi-coke is a typical coal-based solid waste fuel. The traditional treatment method is to landfill the semi-coke as waste, which not only wastes resources but also pollutes the environment.

[0008] In view of the above problems, it is necessary to propose a semi-coke disposal system and method for stable combustion of coal-fired units coupled with aluminum fuel energy storage, which is reasonably designed and effectively solves the above problems. Summary of the invention

[0009] The embodiments of the present disclosure aim to solve at least one of the technical problems existing in the prior art and provide a semi-coke disposal system and method for a coal-fired unit with stable combustion coupled with aluminum fuel energy storage.

[0010] The present disclosure provides a semi-coke disposal system for a coal-fired unit with stable combustion coupled with aluminum fuel energy storage, comprising a boiler, an Al 2 O 3 electrolyzer, condenser, first gas mixer, oxygen-enriched air storage tank, coal mill and semi-gasification burner; wherein the boiler is provided with a semi-gasification burner nozzle, H 2Combustion nozzles, semi-coke burner nozzles and overburnt air nozzles

[0011] The Al 2 O 3 The electrolyzer is powered by a renewable energy generator. 2 O 3 The anode outlet of the electrolyzer is connected to the inlet of the condenser to transfer the water vapor O generated by electrolysis to the condenser. 2 transported to the condenser;

[0012] The inlet and outlet of the first gas mixer are respectively connected to the first outlet of the condenser and the inlet of the oxygen-enriched air storage tank, so as to extract the dry O in the condenser. 2 and mixed with air to form oxygen-enriched air, which is then transported to the oxygen-enriched air storage tank for storage;

[0013] The inlet and outlet of the coal mill are respectively connected to the first outlet of the oxygen-enriched air storage tank and the inlet of the semi-gasification burner, and the outlet of the semi-gasification burner is connected to the nozzle of the semi-coke burner; wherein,

[0014] After the semi-coke fuel is crushed by the coal mill, the oxygen-enriched air in the oxygen-enriched air storage tank is sent to the semi-gasification burner as gasification background gas for stable combustion.

[0015] Optionally, the second outlet of the oxygen-enriched air storage tank is connected to the overburnt air nozzle to deliver the oxygen-enriched air in the oxygen-enriched air storage tank into the boiler overburnt zone as oxygen-enriched overburnt air.

[0016] Optionally, the system further comprises a condensed water reservoir, the inlet of which is connected to the second outlet of the condenser, for collecting water vapor O 2 The condensed water is used as feed water for the boiler.

[0017] Optionally, the system further comprises Al-H 2 O reactor, H 2 -H 2 O separator, aluminum powder storage and second gas mixer;

[0018] The inlet and outlet of the aluminum powder storage are respectively connected to the Al 2 O 3 The cathode outlet of the electrolyzer and the Al-H 2 O reactor inlet is connected to the Al-H 2 The first outlet of the O reactor is connected to the H 2 -H 2 O separator inlet is connected; wherein,

[0019] The Al-H2 The aluminum powder in the O reactor reacts chemically with part of the steam extracted from the turbine to form a mixed gas which is then transported to the H 2 -H 2 O separator for separation;

[0020] The first inlet and the second inlet of the second gas mixer are connected to the first outlet of the oxygen-enriched air storage tank and the H 2 -H 2 The outlet of the second gas mixer is connected to the inlet of the coal pulverizer;

[0021] The second gas mixer is used to mix the extracted oxygen-enriched air with water vapor to obtain a gasified background gas.

[0022] Optionally, the H 2 -H 2 The hydrogen outlet of the O separator is connected to the H 2 The combustion nozzle is connected to the H 2 It is fed into the furnace of the boiler for combustion as a combustion-supporting fuel.

[0023] Optionally, the Al-H 2 The second outlet of the O reactor is connected to the Al 2 O 3 The inlet of the electrolyzer is connected to the Al-H 2 Al produced in the O reactor 2 O 3 Transported to the Al 2 O 3 The electrolyzer performs electrolysis.

[0024] Optionally, also include Al 2 O 3 Storage container;

[0025] The Al 2 O 3 The reservoir is connected to the Al-H 2 O reactor and the Al 2 O 3 between electrolyzers.

[0026] Optionally, the system further comprises an aluminum particle storage tank;

[0027] The aluminum particle reservoir is connected to the Al 2 O 3 between the cathode of the electrolyzer and the aluminum powder reservoir.

[0028] Optionally, the H 2 The combustion nozzle and the semi-gasification burner nozzle are sequentially arranged at the lower part of the semi-coke burner nozzle.

[0029] Another aspect of the disclosed embodiment provides a method for disposing semi-coke of a coal-fired unit with stable combustion coupled with aluminum fuel energy storage, which adopts the semi-coke disposal system of the coal-fired unit with stable combustion coupled with aluminum fuel energy storage as described above.

[0030] The semi-coke disposal system and method of the coal-fired unit stable combustion coupled with aluminum fuel energy storage in the disclosed embodiment utilizes the redundant power of the renewable energy power generation device to store aluminum 2 O 3 The electrolyzer is powered by oxygen generated by electrolysis and mixed with air to form oxygen-enriched air. The oxygen-enriched air and semi-coke fuel can achieve semi-gasification and stable combustion of semi-coke fuel in the semi-gasification burner, combining the redundant power of renewable energy power generation devices with thermal power generation, greatly reducing the carbon emissions of the power system. The system combines coal-fired power plants, new energy power generation, coal-based solid waste utilization and ecological restoration, which not only improves the utilization rate of coal-based solid waste and expands its application areas, but also builds a multi-coupled energy system and reduces the carbon emissions of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a structural schematic diagram of a semi-coke disposal system for a coal-fired unit with stable combustion coupled with aluminum fuel energy storage in one embodiment of the present disclosure. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solutions of the embodiments of the present disclosure, the embodiments of the present disclosure are further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] like Figure 1 As shown, one aspect of the embodiment of the present disclosure provides a semi-coke disposal system for a coal-fired unit with stable combustion coupled with aluminum fuel energy storage, comprising a boiler 1, an Al 2 O 3 The boiler 1 is provided with a semi-gasification burner nozzle 8, a condenser 3, a first gas mixer 4, an oxygen-enriched air storage tank 5, a coal mill 6 and a semi-gasification burner 7. 2 Combustion nozzle 9, semi-coke burner nozzle 10 and burnout air nozzle 11.

[0034] Al 2 O 3 Electrolyzer 2 is powered by a renewable energy generator. 2 O 3 The anode outlet of the electrolyzer 2 is connected to the inlet of the condenser 3 to transfer the water vapor O generated by electrolysis to the condenser 3. 2 The renewable energy power generation device can be a wind power generation device or a photovoltaic power generation device, and the redundant power generated by wind power generation and photovoltaic power generation is Al 2 O3 The electrolyzer 2 provides electricity, thereby reducing the carbon emissions of the power system.

[0035] The inlet and outlet of the first gas mixer 4 are connected to the first outlet of the condenser 3 and the inlet of the oxygen-enriched air storage tank 5 respectively, so as to extract the dry oxygen in the condenser 3. 2 The oxygen is mixed with air to form oxygen-enriched air and then transported to the oxygen-enriched air storage tank 5 for storage.

[0036] The inlet and outlet of the coal mill 6 are connected to the first outlet of the oxygen-enriched air storage tank 5 and the inlet of the semi-gasification burner 7 respectively, and the outlet of the semi-gasification burner 7 is connected to the nozzle 10 of the semi-coke burner.

[0037] The semi-coke fuel is crushed by the coal mill 6 and then sent to the semi-gasification burner 7 by the oxygen-enriched air in the oxygen-enriched air storage tank 5 as the gasification background gas for stable combustion.

[0038] Specifically, the redundant power generated by wind power generation and photovoltaic power generation is Al 2 O 3 Electrolyzer 2 is powered to produce water vapor O at the anode of the electrolyzer. 2 , the generated water vapor O 2 After entering the condenser 3, condensation is performed to obtain dry O 2 , dry O 2 After entering the first gas mixer 4 and mixing with air, oxygen-enriched air is prepared, and the obtained oxygen-enriched air is transported to the oxygen-enriched air storage tank 5 for collection and storage. After the semi-coke fuel is crushed by the coal mill 6, the oxygen-enriched air in the oxygen-enriched air storage tank 5 is transported to the semi-gasification burner 7 as the gasification background gas for stable combustion.

[0039] The semi-coke disposal system of the coal-fired unit with stable combustion coupled with aluminum fuel energy storage in the embodiment of the present disclosure utilizes the redundant power of the renewable energy power generation device to be Al 2 O 3 The electrolyzer is powered by oxygen generated by electrolysis and mixed with air to form oxygen-enriched air. The oxygen-enriched air and semi-coke fuel can achieve semi-gasification and stable combustion of semi-coke fuel in the semi-gasification burner, combining the redundant power of renewable energy power generation devices with thermal power generation, greatly reducing the carbon emissions of the power system. The system combines coal-fired power plants, new energy power generation, coal-based solid waste utilization and ecological restoration, which not only improves the utilization rate of coal-based solid waste and expands its application areas, but also builds a multi-coupled energy system and reduces the carbon emissions of the system.

[0040] For example, Figure 1 As shown, the second outlet of the oxygen-enriched air storage tank 5 is connected to the overfire air nozzle 11 so as to deliver the oxygen-enriched air in the oxygen-enriched air storage tank 5 into the boiler overfire zone as oxygen-enriched overfire air.

[0041] Specifically, the oxygen-enriched air in the oxygen-enriched air storage tank 5 is divided into two paths, one of which is fed into the coal mill 6 as the gasification background gas of the semi-coke fuel, and the other is fed into the boiler burnout zone through the burnout air nozzle 11 as oxygen-enriched burnout air. The oxygen-enriched air can be burned in the boiler burnout zone, improving the boiler combustion efficiency and reducing NO x emission.

[0042] For example, Figure 1 As shown, the system also includes a condensed water reservoir, the inlet of which is connected to the second outlet of the condenser 3 for collecting water vapor O 2 The condensed water is used as boiler feed water.

[0043] Specifically, Al 2 O 3 The water vapor O produced by electrolysis in electrolyzer 2 2 The water vapor in the gas is condensed by the condenser 3 to form condensed water. The condensed water has a very high purity and can be collected by the condensed water storage device as feed water for the boiler, thus saving energy.

[0044] For example, Figure 1 As shown, the system also includes Al-H 2 O reactor 12, H 2 -H 2 An oxygen separator 13 , an aluminum powder storage 14 and a second gas mixer 15 .

[0045] The inlet and outlet of the aluminum powder storage 14 are respectively connected to the Al 2 O 3 Cathode outlet of electrolyzer 2 and Al-H 2 O reactor 12 inlet is connected, Al-H 2 The first outlet of the O reactor 12 is connected to the H 2 -H 2 The inlet of O separator 13 is connected.

[0046] Among them, Al-H 2 The aluminum powder in the O reactor 12 reacts chemically with part of the steam extracted from the turbine to form a mixed gas which is then transported to the H 2 -H 2 The O separator 13 performs separation.

[0047] The first inlet and the second inlet of the second gas mixer 15 are connected to the first outlet and the H of the oxygen-enriched air storage tank 5, respectively. 2 -H 2 The outlet of the second gas mixer 15 is connected to the inlet of the coal pulverizer 6 .

[0048] The second gas mixer 15 is used to mix the extracted oxygen-enriched air with water vapor to obtain a gasified background gas.

[0049] Specifically, Al 2 O 3 After electrolysis in the electrolyzer 2, aluminum particles are generated at the cathode. After the aluminum particles are crushed and other processes, aluminum powder is obtained and stored in the aluminum powder storage 14. The aluminum powder in the aluminum powder storage 14 enters the Al-H 2 O reactor 12 reacts chemically with part of the steam extracted from the steam turbine to form a hydrogen mixed gas, and the steam extracted from the steam turbine is used as the Al-H 2 The reaction medium of O reactor 12 can improve the reaction efficiency.

[0050] Hydrogen mixed gas enters H 2 -H 2 O separator 13 to separate and form H 2 The oxygen-enriched air in the oxygen-enriched air storage tank 5 is mixed with H 2 -H 2 The water vapor generated by the O separator 13 enters the second gas mixer 15 for mixing to obtain the gasification background gas of the semi-coke fuel.

[0051] Among them, when the unit is running at low load, the semi-coke fuel is crushed by the coal mill 6 and then sent to the semi-gasification burner 7 as the gasification background gas by the mixer of mixed water vapor and oxygen-enriched air in the second gas mixer 15 for stable combustion, thereby improving the stable combustion performance of the semi-gasification burner 7 and further improving the low-load stable combustion capability of the unit.

[0052] In this embodiment, the metal aluminum fuel energy storage system is combined with a coal-fired unit to achieve efficient and clean disposal of low-volatile fuel semi-coke and low-load stable combustion of the unit, greatly reducing the use of high-quality coal resources.

[0053] For example, Figure 1 As shown, H 2 -H 2 The hydrogen outlet of the O separator 13 is connected to the H 2 The combustion nozzle 9 is connected to the H 2 It is fed into the furnace of boiler 1 for combustion as a combustion-supporting fuel.

[0054] Specifically, H 2 -H 2 The O separator 13 separates the high-temperature H in the hydrogen mixed gas 2 After separation, H 2 The combustion nozzle 9 is sent into the furnace of the boiler 1 for combustion. The steam extracted from the steam turbine is used as the Al-H 2 The reaction medium of the O reactor can improve the reaction efficiency and produce high-temperature H 2 , and H2 Under low load conditions, it can be fed into the furnace for combustion to improve the low load stable combustion capability of the unit.

[0055] For example, Figure 1 As shown, Al-H 2 The second outlet of the O reactor 12 is connected to the Al 2 O 3 The inlet of electrolyzer 2 is connected to the Al-H 2 The Al produced in the O reactor 12 2 O 3 Transport to Al 2 O 3 The electrolyzer 2 performs electrolysis.

[0056] Specifically, the aluminum powder in the aluminum powder storage 14 enters the Al-H 2 O reactor 12 reacts chemically with part of the steam extracted from the steam turbine to generate Al 2 O 3 , the Al 2 O 3 Transport to Al 2 O 3 Electrolyzer 2 participates in the electrolysis process again to achieve Al 2 O 3 Recycling and saving resources.

[0057] For example, Figure 1 As shown, the system also includes Al 2 O 3 Storage 16, Al 2 O 3 The reservoir 16 is connected to the Al-H 2 O reactor 12 and Al 2 O 3 between the electrolyzers 2. Specifically, Al-H 2 The Al produced in the O reactor 12 2 O 3 Can be transported to Al 2 O 3 The collected and stored in the storage container 16, 2 O 3 When electrolyzer 2 is electrolyzing, Al 2 O 3 Al stored in the storage 16 2 O 3 Transport to Al 2 O 3 Electrolyzer 2.

[0058] For example, Figure 1 As shown, the system also includes an aluminum particle storage 17, which is connected to the Al2 O 3 Between the cathode of the electrolyzer 2 and the aluminum powder reservoir 14.

[0059] Specifically, Al 2 O 3 The aluminum particles generated at the cathode during electrolysis in the electrolyzer 2 can be transported to the aluminum particle storage 17 for collection and storage. The aluminum particles in the aluminum particle storage 17 are crushed and other processes to prepare aluminum powder.

[0060] For example, Figure 1 As shown, H 2 The combustion nozzle 9 and the semi-gasification burner nozzle 10 are sequentially arranged at the lower part of the semi-coke burner nozzle 8. 2 The heat generated by the combustion and semi-gasification burners assists the combustion of semi-coke, which can improve the stable combustion performance of the unit under full load.

[0061] For example, Figure 1 As shown, the system also includes a dust collector 18, an induced draft fan 19 and a chimney 20 which are connected in sequence; wherein the inlet of the dust collector 18 is connected to the boiler 1, and the flue gas generated by the combustion of the boiler 1 can be dedusted in the dust collector 18 and then discharged through the induced draft fan 19 and the chimney 20.

[0062] Another aspect of the disclosed embodiment provides a method for disposing semi-coke of a coal-fired unit with stable combustion coupled with aluminum fuel energy storage, which adopts the semi-coke disposal system of the coal-fired unit with stable combustion coupled with aluminum fuel energy storage as described above. The structure of the system has been described in detail above and will not be repeated here.

[0063] The operation method of the semi-coke disposal system for the coal-fired unit with stable combustion coupled with aluminum fuel energy storage in the embodiment of the present disclosure is as follows:

[0064] 1) The redundant power generation from wind power and photovoltaic power generation is Al 2 O 3 Electrolyzer 2 provides electrical energy to prepare aluminum particles and water vapor O 2 .

[0065] 2) After the aluminum particles are crushed and other processes, the aluminum powder is stored in the aluminum powder storage tank 14, and the water vapor O 2 After being dried in the condenser 3 , the oxygen is mixed with air in the first gas mixer 4 to obtain oxygen-enriched air, which is then stored in the oxygen-enriched air storage tank 5 .

[0066] 3) Oxygen-enriched air and H 2 -H 2 The H separated in the O separator 13 2 O(g) is mixed in the second gas mixer 15 to prepare a gasified background gas without H 2O(g), oxygen-enriched air serves alone as the gasification background gas.

[0067] 4) Part of the steam turbine extraction steam and aluminum powder in Al-H 2 O reactor 12 undergoes a chemical reaction to produce Al 2 O 3 Collect Re-entry Al 2 O 3 Electrolyzer 2 performs electrolysis, and H 2 and H 2 O(g) gas mixture is introduced into H 2- H 2 O separator 13.

[0068] 5) After the semi-coke fuel is crushed by the coal mill 6, it is sent to the semi-gasification burner 7 by the gasification background gas in the second gas mixer 15 for stable combustion.

[0069] 6) Part of the oxygen-enriched air in the oxygen-enriched air storage tank 5 is sent into the furnace through the overburnt air nozzle 11 as oxygen-enriched overburnt air.

[0070] 7) The flue gas generated by the combustion of the boiler 1 can be dedusted in the dust collector 18 and then discharged through the induced draft fan 19 and the chimney 20.

[0071] The semi-coke disposal system and method for the stable combustion of coal-fired units coupled with aluminum fuel energy storage of the disclosed embodiment combines the metal aluminum fuel energy storage system with the coal-fired units, realizes the efficient and clean disposal of low-volatile fuel semi-coke and the low-load stable combustion of the units, and greatly reduces the use of high-quality coal resources. The system further combines coal-fired power plants, new energy power generation, coal-based solid waste utilization and ecological restoration, which not only improves the utilization rate of coal-based solid waste and expands its application field, but also constructs a multi-coupled energy system and reduces the carbon emissions of the system.

[0072] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the embodiments of the present disclosure, but the embodiments of the present disclosure are not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the embodiments of the present disclosure, and these modifications and improvements are also considered to be within the protection scope of the embodiments of the present disclosure.

Claims

1. A semi-coke disposal system for coal-fired units with stable combustion coupled with aluminum fuel energy storage, characterized in that: The invention comprises a boiler, an Al2O3 electrolyzer, a condenser, a first gas mixer, an oxygen-enriched air storage tank, a coal mill and a semi-gasification burner; wherein the boiler is provided with a semi-gasification burner nozzle, a H2 combustion nozzle, a semi-coke burner nozzle and a burnout air nozzle. The Al2O3 electrolyzer is powered by a renewable energy power generation device, and the anode outlet of the Al2O3 electrolyzer is connected to the inlet of the condenser to transport the water vapor O2 generated by electrolysis to the condenser; The inlet and outlet of the first gas mixer are connected to the first outlet of the condenser and the inlet of the oxygen-enriched air storage tank respectively, so as to extract the dry O2 in the condenser and mix it with air to form oxygen-enriched air, and then transport it to the oxygen-enriched air storage tank for storage; The inlet and outlet of the coal mill are respectively connected to the first outlet of the oxygen-enriched air storage tank and the inlet of the semi-gasification burner, and the outlet of the semi-gasification burner is connected to the nozzle of the semi-coke burner; wherein, After the semi-coke fuel is crushed by the coal mill, the oxygen-enriched air in the oxygen-enriched air storage tank is sent to the semi-gasification burner as gasification background gas for stable combustion.

2. The system according to claim 1, characterized in that The second outlet of the oxygen-enriched air storage tank is connected to the overburnt air nozzle so as to deliver the oxygen-enriched air in the oxygen-enriched air storage tank into the boiler overburnt zone as oxygen-enriched overburnt air.

3. The system according to claim 1, characterized in that The system further comprises a condensed water reservoir, the inlet of which is connected to the second outlet of the condenser and is used for collecting condensed water after condensation of water vapor O2 to serve as feed water for the boiler.

4. The system according to any one of claims 1 to 3, characterized in that: The system also includes an Al-H2O reactor, a H2-H2O separator, an aluminum powder storage and a second gas mixer; The inlet and outlet of the aluminum powder storage are connected to the cathode outlet of the Al2O3 electrolyzer and the inlet of the Al-H2O reactor respectively, and the first outlet of the Al-H2O reactor is connected to the inlet of the H2-H2O separator; wherein, The aluminum powder in the Al-H2O reactor reacts chemically with part of the steam extracted from the steam turbine to form a mixed gas, which is then transported to the H2-H2O separator for separation; The first inlet and the second inlet of the second gas mixer are connected to the first outlet of the oxygen-enriched air storage tank and the water vapor outlet of the H2-H2O separator respectively, and the outlet of the second gas mixer is connected to the inlet of the coal mill; The second gas mixer is used to mix the extracted oxygen-enriched air with water vapor to obtain a gasified background gas.

5. The system according to claim 4, characterized in that The hydrogen outlet of the H2-H2O separator is connected to the H2 combustion nozzle of the boiler so that H2 is fed into the furnace of the boiler for combustion as a combustion-supporting fuel.

6. The system according to claim 4, characterized in that The second outlet of the Al-H2O reactor is connected to the inlet of the Al2O3 electrolyzer to transport the Al2O3 generated in the Al-H2O reactor to the Al2O3 electrolyzer for electrolysis.

7. The system according to claim 6, characterized in that Also included is an Al2O3 reservoir; The Al2O3 reservoir is connected between the Al-H2O reactor and the Al2O3 electrolyzer.

8. The system according to claim 4, characterized in that The system also includes an aluminum pellet reservoir; The aluminum particle reservoir is connected between the cathode of the Al2O3 electrolyzer and the aluminum powder reservoir.

9. The system according to any one of claims 1 to 3, characterized in that: The H2 combustion nozzle and the semi-gasification burner nozzle are sequentially arranged at the lower part of the semi-coke burner nozzle.

10. A method for treating semi-coke of a coal-fired unit for stable combustion coupled with aluminum fuel energy storage, characterized in that: A semi-coke disposal system for coal-fired unit stable combustion coupled with aluminum fuel energy storage as described in any one of claims 1 to 9.

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