CN113023671A - Power generation system for coupling aluminum combustion and hydrogen fuel cell and working method thereof - Google Patents
Power generation system for coupling aluminum combustion and hydrogen fuel cell and working method thereof Download PDFInfo
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 83
- 239000000446 fuel Substances 0.000 title claims abstract description 75
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 65
- 239000001257 hydrogen Substances 0.000 title claims abstract description 65
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 58
- 238000010248 power generation Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000008878 coupling Effects 0.000 title claims abstract description 13
- 238000010168 coupling process Methods 0.000 title claims abstract description 13
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 13
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 31
- 230000008929 regeneration Effects 0.000 claims abstract description 11
- 238000011069 regeneration method Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- 239000007787 solid Substances 0.000 claims description 36
- 239000007789 gas Substances 0.000 claims description 19
- 238000000926 separation method Methods 0.000 claims description 17
- 229910052593 corundum Inorganic materials 0.000 claims description 14
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 14
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 14
- 238000003487 electrochemical reaction Methods 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 239000007800 oxidant agent Substances 0.000 claims description 9
- 230000001590 oxidative effect Effects 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 239000007795 chemical reaction product Substances 0.000 claims description 6
- 239000011343 solid material Substances 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 3
- 229910001610 cryolite Inorganic materials 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 241000190022 Pilea cadierei Species 0.000 claims 1
- 230000004907 flux Effects 0.000 claims 1
- 238000004146 energy storage Methods 0.000 abstract description 16
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/06—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of inorganic compounds containing electro-positively bound hydrogen, e.g. water, acids, bases, ammonia, with inorganic reducing agents
- C01B3/08—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of inorganic compounds containing electro-positively bound hydrogen, e.g. water, acids, bases, ammonia, with inorganic reducing agents with metals
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/22—Fuel cells in which the fuel is based on materials comprising carbon or oxygen or hydrogen and other elements; Fuel cells in which the fuel is based on materials comprising only elements other than carbon, oxygen or hydrogen
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/133—Renewable energy sources, e.g. sunlight
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Abstract
The invention discloses a power generation system for coupling aluminum combustion and a hydrogen fuel cell and a working method thereof, wherein the system comprises an aluminum combustion and hydrogen fuel cell power generation subsystem and an aluminum fuel electrolysis regeneration subsystem; the invention effectively couples the aluminum fuel energy storage, the aluminum combustion power generation, the hydrogen fuel cell, the aluminum production by the alumina electrolysis and the like, and has the advantages of high energy storage density, long energy storage period, permanent storage, no consumption of fuel cycle regeneration, convenience for developing global energy trade and the like.
Description
Technical Field
The invention belongs to the technical field of green power generation and advanced energy storage, and particularly relates to a power generation system for coupling aluminum combustion and a hydrogen fuel cell and a working method thereof.
Background
With the global atmospheric pollution and climate warming trend becoming more severe, the traditional power generation system mainly using fossil energy will face unprecedented pressure and challenge. From a worldwide perspective, countries are striving to increase the proportion of renewable energy sources in their own power structures to generate electricity. In the future, the development trend in the world energy field is bound to be a gradual replacement of fossil energy by renewable energy. However, renewable energy has seriously hindered the development of renewable energy power generation due to its own characteristics of intermittency, instability and uncertainty. In the future, renewable energy sources are required to replace fossil energy sources, and development and support of large-scale and long-period energy storage technologies are required.
At present, research in the field of energy storage technology is active, and various energy storage technologies, such as water pumping energy storage, compressed air energy storage, lithium battery energy storage, super capacitor energy storage, flywheel energy storage, hydrogen storage and the like, are rapidly developed. However, the existing energy storage technology has difficulty in meeting the requirements of high energy storage density, mobility, low self-consumption loss and global energy trade at the same time. Therefore, there is a need to develop a new energy storage technology, so that renewable energy power generation is developed to a deeper and wider direction worldwide.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a power generation system for coupling aluminum combustion and a hydrogen fuel cell and a working method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
a power generation system for coupling aluminum combustion and a hydrogen fuel cell comprises an aluminum combustion and hydrogen fuel cell power generation subsystem and an aluminum fuel electrolysis regeneration subsystem;
the aluminum combustion and hydrogen fuel cell power generation subsystem comprises a powder preparation device 1, an aluminum water combustion device 2, a gas-solid separation device 3, a mixed working medium turbine 4, a power generator 5, a condenser 6 and a hydrogen fuel cell 7; the aluminum fuel is connected with the material inlet of the powder making device 1 through the conveying pipeline, the outlet of the powder making device 1 is connected with the fuel inlet of the aluminum water combustion device 2, the oxidant inlet of the aluminum water combustion device 2 is connected with the oxidant water conveying pipeline, in the aluminum water combustion device 2, aluminum powder and water are subjected to violent combustion reaction, and the reaction equation is 2Al +3H2O＝Al2O3+3H2The oxidant water is excessive in the reaction process, and the reaction product is solid Al2O3Steam and hydrogen; the outlet of the aluminum water combustion device 2 is communicated with the inlet of the gas-solid separation device 3, after the gas-solid separation is completed, the mixed gas of steam and hydrogen is communicated with the inlet of the mixed working medium turbine 4 through the gas outlet of the gas-solid separation device 3, the mixed gas with high temperature and high pressure expands in the mixed working medium turbine 4 to do work and drive the generator 5 to rotate to generate power, the generator 5 is coaxially connected with the mixed working medium turbine 4, and the solid Al is in solid Al2O3The solid materials are collected through a solid material outlet of the gas-solid separation device 3; a working medium outlet of the mixed working medium turbine 4 is connected with a gas inlet of the condenser 6, water vapor in the mixed working medium is separated from hydrogen after being condensed, a gas outlet of the condenser 6 is connected with a hydrogen inlet of the hydrogen fuel cell 7, and the hydrogen generates electrochemical reaction in the hydrogen fuel cell 7 to provide electric energy outwards;
the aluminum fuel electrolysis regeneration subsystem comprises a transportation device 8 and an aluminum oxide electrolysis device 9; solid Al generated by combustion reaction of aluminum and water2O3Transported to an industrial electrolytic aluminum plant by a transportation device 8, solid Al2O3Is connected with an alumina material inlet of the alumina electrolysis device 9, the other material inlet of the alumina electrolysis device 9 is connected with a fluxing agent cryolite conveying pipeline, and a power supply of the alumina electrolysis device 9Connected to the surplus renewable energy power supply 10 in the power grid, the aluminum oxide undergoes an electrolytic reaction in the aluminum oxide electrolysis unit 9, and fuel aluminum is regenerated on the cathode of the aluminum oxide electrolysis unit 9.
The mass ratio of steam to hydrogen in the inlet working medium of the mixed working medium turbine 4 is (20-45): 1.
the surplus renewable energy power supply 10 in the grid is electricity generated by renewable energy sources that is difficult to utilize in the grid.
According to the working method of the power generation system of the coupled aluminum combustion and hydrogen fuel cell, aluminum oxide is used as a raw material of the power generation system, when the power generation of renewable energy sources in a power grid system is excessive or surplus, the molten aluminum oxide is electrolyzed by the aluminum oxide electrolysis device 9, and the electricity of the renewable energy sources is converted into the chemical energy of aluminum fuel through electrochemical reaction and stored; when the power generation of renewable energy sources in a power grid system is insufficient or other geographical positions in the world need power supply, the chemical energy of aluminum fuel is converted into electric energy through an aluminum combustion and hydrogen fuel cell power generation electronic system to supply power to the outside; the specific process of converting chemical energy into electric energy is as follows: the aluminum fuel and the water are subjected to violent combustion reaction in the aluminum water combustion device 2, and the reaction product is solid Al2O3The high-temperature high-pressure steam and hydrogen mixed gas expands in the mixed working medium turbine 4 to do work and drive the generator 5 to rotate to generate power; in addition, the water vapor in the mixed working medium is separated from the hydrogen after being condensed in the condenser 6, and then the hydrogen generates electrochemical reaction in the hydrogen fuel cell 7 to provide electric energy for the outside. Solid Al after combustion of aluminum2O3The fuel aluminum can be recovered by the electrolytic regeneration device after being recovered, thereby realizing the recycling, and the alumina is not consumed in the whole process.
The invention has the beneficial effects that:
the power generation system and the working method thereof coupling the aluminum combustion and the hydrogen fuel cell have the following advantages that: (1) the energy density of the metal fuel aluminum is high; (2) the aluminum fuel contains no carbon, and the whole working process of the system does not produce pollutants, so that the system is a green low-carbon power generation technology; (3) renewable energy power is converted into chemical energy of metal fuel aluminum for storage through electrochemical reaction, and the method has the advantages of long energy storage period and capability of realizing permanent storage; (4) after the combustion reaction of the aluminum fuel in the whole process, the combustion product can be regenerated by electrolysis to obtain the metal fuel aluminum, and the fuel aluminum is regenerated circularly and has no consumption in the whole process; (5) the energy is stored through the metal fuel aluminum, so that the energy trade in the global range is conveniently developed.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is a powder making device, 2 is an aluminum water combustion device, 3 is a gas-solid separation device, 4 is a mixed working medium turbine, 5 is a generator, 6 is a condenser, 7 is a hydrogen fuel cell, 8 is a transportation device, 9 is an aluminum oxide electrolysis device, and 10 is surplus renewable energy power supply in a power grid.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, a power generation system coupling an aluminum combustion and hydrogen fuel cell includes an aluminum combustion and hydrogen fuel cell power generation subsystem and an aluminum fuel electrolysis regeneration subsystem;
the aluminum combustion and hydrogen fuel cell power generation subsystem comprises a powder preparation device 1, an aluminum water combustion device 2, a gas-solid separation device 3, a mixed working medium turbine 4, a power generator 5, a condenser 6 and a hydrogen fuel cell 7; the aluminum fuel is connected with the material inlet of the powder making device 1 through the conveying pipeline, the outlet of the powder making device 1 is connected with the fuel inlet of the aluminum water combustion device 2, the oxidant inlet of the aluminum water combustion device 2 is connected with the oxidant water conveying pipeline, in the aluminum water combustion device 2, aluminum powder and water are subjected to violent combustion reaction, and the reaction equation is 2Al +3H2O＝Al2O3+3H2The oxidant water is excessive in the reaction process, and the reaction product is solid Al2O3Steam and hydrogen; the outlet of the aluminum water combustion device 2 is communicated with the inlet of the gas-solid separation device 3, and after the gas-solid separation is finished, the mixed gas of the steam and the hydrogen is permeated with the mixed working medium through the gas outlet of the gas-solid separation device 3The inlets of the flat plates 4 are communicated, the high-temperature and high-pressure mixed gas expands in the mixed working medium turbine 4 to do work and drive the generator 5 to rotate to generate power, the generator 5 is coaxially connected with the mixed working medium turbine 4, and the solid Al is2O3The solid materials are collected through a solid material outlet of the gas-solid separation device 3; a working medium outlet of the mixed working medium turbine 4 is connected with a gas inlet of the condenser 6, water vapor in the mixed working medium is separated from hydrogen after being condensed, a gas outlet of the condenser 6 is connected with a hydrogen inlet of the hydrogen fuel cell 7, and the hydrogen generates electrochemical reaction in the hydrogen fuel cell 7 to provide electric energy outwards;
the aluminum fuel electrolysis regeneration subsystem comprises a transportation device 8 and an aluminum oxide electrolysis device 9; solid Al generated by combustion reaction of aluminum and water2O3Transported to an industrial electrolytic aluminum plant by a transportation device 8, solid Al2O3The device is connected with an alumina material inlet of an alumina electrolysis device 9, the other material inlet of the alumina electrolysis device 9 is connected with a fluxing agent cryolite conveying pipeline, a power supply of the alumina electrolysis device 9 is connected with a surplus renewable energy power supply 10 in a power grid, the alumina generates electrolytic reaction in the alumina electrolysis device 9, and fuel aluminum is regenerated on a cathode of the alumina electrolysis device 9.
The power generation system coupling aluminum combustion and the hydrogen fuel cell takes aluminum oxide as a raw material, when the renewable energy in a power grid system generates excessive or surplus power, the aluminum oxide electrolysis device 9 is used for electrolyzing the molten aluminum oxide, and the renewable energy power is converted into chemical energy of aluminum fuel through electrochemical reaction and stored. When the power generation of renewable energy sources in a power grid system is insufficient or other geographical positions in the world need power supply, the chemical energy of aluminum fuel is converted into electric energy through an aluminum combustion and hydrogen fuel cell power generation subsystem, and the power supply is realized; the specific process of converting chemical energy into electric energy is as follows: the aluminum fuel and the water are subjected to violent combustion reaction in the aluminum water combustion device 2, and the reaction product is solid Al2O3High-temperature and high-pressure steam and hydrogen mixed gas, wherein the high-temperature and high-pressure mixed gas expands in the mixed working medium turbine 4 to do work and drives the generator 5 to rotate to generate powerElectricity; in addition, the water vapor in the mixed working medium is separated from the hydrogen after being condensed in the condenser 6, and then the hydrogen generates electrochemical reaction in the hydrogen fuel cell 7 to provide electric energy for the outside. Solid Al after combustion of aluminum2O3The fuel aluminum can be obtained again by the electrolytic regeneration device after being recovered, thereby realizing the recycling and having no consumption of the aluminum oxide in the whole process.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A power generation system coupling an aluminum combustion and a hydrogen fuel cell, characterized by: comprises an aluminum combustion and hydrogen fuel cell power generation subsystem and an aluminum fuel electrolysis regeneration subsystem;
the aluminum combustion and hydrogen fuel cell power generation subsystem comprises a powder preparation device (1), an aluminum water combustion device (2), a gas-solid separation device (3), a mixed working medium turbine (4), a power generator (5), a condenser (6) and a hydrogen fuel cell (7); the aluminum fuel is connected with the material inlet of the powder making device (1) through a conveying pipeline, the outlet of the powder making device (1) is connected with the fuel inlet of the aluminum water combustion device (2), the oxidant inlet of the aluminum water combustion device (2) is connected with the oxidant water conveying pipeline, in the aluminum water combustion device (2), aluminum powder and water are subjected to violent combustion reaction, and the reaction equation is 2Al +3H2O＝Al2O3+3H2The oxidant water is excessive in the reaction process, and the reaction product is solid Al2O3Steam and hydrogen; the outlet of the aluminum water combustion device (2) is communicated with the inlet of the gas-solid separation device (3), after the gas-solid separation is finished, the mixed gas of steam and hydrogen is communicated with the inlet of the mixed working medium turbine (4) through the gas outlet of the gas-solid separation device (3), the mixed gas with high temperature and high pressure expands in the mixed working medium turbine (4) to do work and drives the generator (5) to rotate to generate power, and the generator (5) and the inlet of the gas-solid separation device (3) are communicated with each otherThe mixed working medium turbine (4) is coaxially connected with solid Al2O3The solid materials are collected through a solid material outlet of the gas-solid separation device (3); a working medium outlet of the mixed working medium turbine (4) is connected with a gas inlet of the condenser (6), water vapor in the mixed working medium is separated from hydrogen after being condensed, a gas outlet of the condenser (6) is connected with a hydrogen inlet of the hydrogen fuel cell (7), and the hydrogen generates electrochemical reaction in the hydrogen fuel cell (7) to provide electric energy to the outside;
the aluminum fuel electrolysis regeneration subsystem comprises a transportation device (8) and an aluminum oxide electrolysis device (9); solid Al generated by combustion reaction of aluminum and water2O3Transported to an industrial electrolytic aluminium plant by a transport device (8) and solid Al2O3The device is connected with an alumina material inlet of an alumina electrolysis device (9), the other material inlet of the alumina electrolysis device (9) is connected with a flux cryolite conveying pipeline, a power supply of the alumina electrolysis device (9) is connected with a surplus renewable energy power supply (10) in a power grid, the alumina generates electrolytic reaction in the alumina electrolysis device (9), and fuel aluminum is regenerated on a cathode of the alumina electrolysis device (9).
2. A power generation system coupling an aluminum combustion and hydrogen fuel cell according to claim 1, wherein: the mass ratio of steam to hydrogen in the inlet working medium of the mixed working medium turbine (4) is (20-45): 1.
3. a power generation system coupling an aluminum combustion and hydrogen fuel cell according to claim 1, wherein: the surplus renewable energy power supply (10) in the grid is electricity generated by renewable energy sources that is difficult to utilize in the grid.
4. A method of operating a power generation system coupling an aluminum combustion and hydrogen fuel cell as recited in any one of claims 1 to 3, wherein: the power generation system takes alumina as a raw material, when the renewable energy in the power grid system generates excessive or surplus power, the fused alumina is electrolyzed by the alumina electrolysis device (9), and the renewable energy is electrolyzedThe electric power is converted into chemical energy of aluminum fuel through electrochemical reaction for storage; when the power generation of renewable energy sources in a power grid system is insufficient or other geographical positions in the world need power supply, the chemical energy of the aluminum fuel is converted into electric energy through the aluminum combustion and hydrogen fuel cell power generation subsystem, and the power supply is realized; the specific process of converting chemical energy into electric energy is as follows: the aluminum fuel and the water are subjected to violent combustion reaction in the aluminum water combustion device (2), and the reaction product is solid Al2O3The high-temperature high-pressure steam and hydrogen mixed gas expands in the mixed working medium turbine (4) to do work and drives the generator (5) to rotate to generate electricity; in addition, the water vapor in the mixed working medium is separated from the hydrogen after being condensed in the condenser (6), and then the hydrogen generates electrochemical reaction in the hydrogen fuel cell (7) to provide electric energy; solid Al after combustion of aluminum2O3The fuel aluminum is recovered by the electrolytic regeneration device after being recovered, thereby realizing the recycling, and the alumina is not consumed in the whole process.
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| CN113584530A (en) * | 2021-09-02 | 2021-11-02 | 西安热工研究院有限公司 | Back-pressure aluminum-steam combustion poly-generation energy storage system and working method |
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