CN212250169U - Poly-generation power generation system based on metal fuel aluminum energy storage - Google Patents

Poly-generation power generation system based on metal fuel aluminum energy storage Download PDF

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CN212250169U
CN212250169U CN202021648304.6U CN202021648304U CN212250169U CN 212250169 U CN212250169 U CN 212250169U CN 202021648304 U CN202021648304 U CN 202021648304U CN 212250169 U CN212250169 U CN 212250169U
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reactor
communicated
inlet
alkali liquor
aluminum
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白文刚
张纯
乔永强
张旭伟
顾正萌
李红智
姚明宇
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Xian Thermal Power Research Institute Co Ltd
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Xian Thermal Power Research Institute Co Ltd
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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
    • 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
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    • Y02P20/133—Renewable energy sources, e.g. sunlight

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Abstract

A poly-generation power generation system based on metal fuel aluminum energy storage comprises an aluminum oxide electrolysis device, wherein the cathode of the aluminum oxide electrolysis device is communicated with a fuel inlet of an alkali liquor reactor, and metal fuel aluminum generated by electrochemical reaction is fed into the alkali liquor reactor; the hydrogen outlet of the alkali liquor reactor is communicated with the inlet of the hydrogen storage tank, and the solution outlet of the alkali liquor reactor is communicated with the solution inlet of the NaAlO2 reactor; the solution outlet of the NaAlO2 reactor is communicated with the solution inlet of the Al (OH)3 reactor, and the heat source required by the reaction of the Al (OH)3 reactor comes from renewable energy sources; the outlet of the Al (OH)3 reactor is communicated with the inlet of the molten electrolyte of the alumina electrolysis device through a circulating pipeline; the alkali liquor reactor is connected with a power cycle conversion device. The utility model has the characteristics of energy density is high, green low carbon pollution-free, the energy storage cycle length can realize permanent storage, fuel cyclic regeneration does not have the consumption and can realize hydrogen, sodium carbonate and sodium bicarbonate poly-generation etc.

Description

Poly-generation power generation system based on metal fuel aluminum energy storage
Technical Field
The utility model relates to an advanced energy storage technical field, in particular to poly-generation power generation system based on metal fuel aluminium energy storage.
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, the renewable energy source seriously hinders the development of the renewable energy power generation due to the characteristics of intermittency, instability, uncertainty and the like of the renewable energy source. 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 pumped storage, compressed air storage, lithium battery storage, super capacitor storage, flywheel storage, hydrogen storage, etc., 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
In order to overcome the deficiencies of the prior art, the utility model aims to provide a poly-generation power generation system based on metal fuel aluminium energy storage, this system has that energy storage density is high, energy storage cycle length can realize permanent storage, fuel cycle regeneration do not have the consumption and be convenient for develop global energy trade advantages such as.
In order to realize the purpose, the utility model discloses a technical scheme is:
a poly-generation power generation system based on metal fuel aluminum energy storage comprises an aluminum oxide electrolysis device 1, wherein the cathode of the aluminum oxide electrolysis device 1 is communicated with a fuel inlet of an alkali liquor reactor 2, metal fuel aluminum generated by electrochemical reaction is fed into the alkali liquor reactor 2, the metal fuel aluminum and water generate exothermic reaction in the alkali liquor reactor 2 and generate hydrogen, and the chemical reaction equations are 2Al +6H2O ═ 2Al (OH)3+3H2 and Al (OH)3+ NaOH ═ NaAlO2+2H2O in sequence; the hydrogen outlet of the alkali liquor reactor 2 is communicated with the inlet of the hydrogen storage tank 9, and the solution outlet of the alkali liquor reactor 2 is communicated with the solution inlet of the NaAlO2 reactor 3; a solution outlet of the NaAlO2 reactor 3 is communicated with a solution inlet of the Al (OH)3 reactor 4, a thermal decomposition reaction 2Al (OH)3 ═ Al2O3+3H2O is carried out in the Al (OH)3 reactor 4, the temperature required by the reaction is 650-850 ℃, and a heat source required by the reaction of the Al (OH)3 reactor 4 is from renewable energy sources; the outlet of the Al (OH)3 reactor 4 is communicated with the inlet of the molten electrolyte of the alumina electrolysis device 1 through a circulating pipeline;
the gas inlet of the NaAlO2 reactor 3 is communicated with CO2 from a coal-fired power plant flue gas CO2 trapping device, in the NaAlO2 reactor 3, a NaAlO2 solution reacts with CO2 to generate Al (OH)3, and meanwhile, important chemical raw materials Na2CO3 and NaHCO3 can be generated;
the alkali liquor reactor 2 is connected with a power cycle conversion device.
The power cycle conversion device comprises a working medium inlet of an alkali liquor reactor 2 communicated with an outlet of a water feeding pump 8, a working medium outlet of the alkali liquor reactor 2 communicated with an inlet of a steam turbine 5, the steam turbine 5 is coaxially connected with a generator 6, a working medium outlet of the steam turbine 5 is communicated with a working medium inlet of a condenser 7, and a working medium outlet of the condenser 7 is communicated with a working medium inlet of the water feeding pump 8; working medium in power cycle is boosted by a water feeding pump 8 and then enters an alkali liquor reactor 2 to absorb part of heat generated by reaction of metal fuel aluminum and water, the temperature of the working medium is raised to be superheated steam, then the working medium enters a steam turbine 5 to expand and work and drives a generator 6 to rotate and generate electricity, the working medium which has done work enters a condenser 7 through an outlet of the steam turbine 5, and the working medium is condensed to be water and enters the water feeding pump 8 again to enter the next cycle process.
The electricity required by the electrochemical reaction of the aluminum oxide electrolysis device 1 is provided by renewable energy power generation.
According to the working method of the metal fuel aluminum energy storage-based poly-generation power generation system, aluminum oxide is used as a raw material of the poly-generation power generation system, when the renewable energy is surplus or surplus in power generation, the aluminum oxide electrolysis device 1 is used for electrolyzing the molten aluminum oxide, and the electricity of the renewable energy is converted into the chemical energy of the aluminum fuel through electrochemical reaction and stored; when the power generation of renewable energy sources in the power grid is insufficient, the chemical energy of the metal fuel aluminum is converted into electric energy through the alkali liquor reactor 2 and the power cycle conversion device so as to supplement the shortage of the power generation of the renewable energy sources.
The specific working method comprises the following steps: when renewable energy resources in an electric network system in a certain region in the world are surplus in power generation, the aluminum oxide electrolysis device 1 is used for converting molten aluminum oxide into metal fuel aluminum through electrochemical reaction, so that the renewable energy resources are converted into chemical energy of the metal fuel aluminum for storage; when the renewable energy sources in the power grid system in a certain region in the global range are insufficient in power generation, the metal fuel aluminum is obtained by developing global energy source trade, and then the chemical energy of the metal fuel aluminum is converted into electric energy by using the alkali liquor reactor 2 and the power cycle conversion device so as to supplement the insufficiency of the renewable energy sources in the power grid system in power generation; a reaction product NaAlO2 of metal fuel aluminum after reaction in an alkali liquor reactor 2 is converted by a NaAlO2 reactor 3 and an Al (OH)3 reactor 4 to generate aluminum hydroxide and aluminum oxide in sequence, the finally generated aluminum oxide is recovered and is transported to a region with surplus renewable energy power generation in the global scope by developing energy trade in the global scope, then the molten aluminum oxide is converted into the metal fuel aluminum by an electrochemical reaction by utilizing an aluminum oxide electrolysis device 1, and the renewable energy power generation is converted into chemical energy of the metal fuel aluminum for storage, so that the cyclic utilization is realized.
The utility model has the advantages that:
a poly-generation power generation system based on metal fuel aluminium energy storage, have following advantage: (1) the energy density of the metal fuel aluminum is high; (2) the aluminum fuel does not contain carbon, no pollutant is generated in the whole working process of the system, the emission of greenhouse gas CO2 can be reduced, and the method is a green low-carbon power generation technology; (3) renewable energy power generation is converted into chemical energy of metal fuel aluminum through electrochemical reaction for storage, and the method has the advantages of long energy storage period and capability of realizing permanent storage; (4) after the aluminum fuel reacts in the whole process, the reaction product can be regenerated by electrolysis to obtain the metal fuel aluminum again, and the fuel aluminum is regenerated circularly and has no consumption in the whole process; (5) the poly-generation of hydrogen, sodium carbonate and sodium bicarbonate can be realized while generating electricity; (6) 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 an aluminum oxide electrolysis device, 2 is an alkali liquor reactor, 3 is a NaAlO2 reactor, 4 is an Al (OH)3 reactor, 5 is a steam turbine, 6 is a generator, 7 is a condenser, 8 is a water supply pump, and 9 is a hydrogen storage tank.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the poly-generation power generation system based on metal fuel aluminum energy storage of the present invention includes an aluminum oxide electrolysis device 1, an alkali solution reactor 2, a NaAlO2 reactor 3, an al (oh)3 reactor 4, a steam turbine 5, a generator 6, a condenser 7, a water feeding pump 8 and a hydrogen storage tank 9.
The power supply required by the aluminum oxide electrolysis device 1 is provided by renewable energy power generation, the cathode of the aluminum oxide electrolysis device 1 is communicated with the fuel inlet of the alkali liquor reactor 2, metal fuel aluminum generated by electrochemical reaction is fed into the alkali liquor reactor 2, the metal fuel aluminum and water generate exothermic reaction in the alkali liquor reactor 2 and generate hydrogen, and the chemical reaction equations are 2Al +6H2O ═ 2Al (OH)3+3H2 and Al (OH)3+ NaOH ═ NaAlO2+2H2O in sequence; the hydrogen outlet of the alkali liquor reactor 2 is communicated with the inlet of the hydrogen storage tank 9, and the solution outlet of the alkali liquor reactor 2 is communicated with the solution inlet of the NaAlO2 reactor 3; the solution outlet of the NaAlO2 reactor 3 is communicated with the solution inlet of the Al (OH)3 reactor 4, and the heat source required by the reaction of the Al (OH)3 reactor 4 comes from renewable energy sources; the outlet of the Al (OH)3 reactor 4 is communicated with the inlet of the molten electrolyte of the alumina electrolysis device 1 through a circulating pipeline.
The gas inlet of the NaAlO2 reactor 3 is communicated with CO2 from a coal-fired power plant flue gas CO2 trapping device, in the NaAlO2 reactor 3, a NaAlO2 solution and CO2 react to generate Al (OH)3, and meanwhile, important chemical raw materials Na2CO3 and NaHCO3 can be generated, and the specific reaction equation is as follows: (1) when CO2 is small, Na2CO3, 2NaAlO2+ CO2+3H2O ═ 2al (oh)3+ Na2CO3 are formed; (2) when CO2 is in excess, NaHCO3, NaAlO2+ CO2+2H2O ═ al (oh)3+ NaHCO3 are formed.
The outlet of the Al (OH)3 reactor 4 is communicated with the molten electrolyte inlet of the aluminum oxide electrolysis device 1 through a circulating pipeline, a thermal decomposition reaction 2Al (OH) 3-Al 2O3+3H2O is carried out in the molten electrolyte, the temperature required by the reaction is 650-850 ℃, and renewable energy is used as a heat source for providing the heat.
The power cycle conversion device comprises a working medium inlet of an alkali liquor reactor 2 communicated with an outlet of a water feeding pump 8, a working medium outlet of the alkali liquor reactor 2 communicated with an inlet of a steam turbine 5, the steam turbine 5 is coaxially connected with a generator 6, a working medium outlet of the steam turbine 5 is communicated with a working medium inlet of a condenser 7, and a working medium outlet of the condenser 7 is communicated with a working medium inlet of the water feeding pump 8; working medium in power cycle is boosted by a water feeding pump 8 and then enters an alkali liquor reactor 2 to absorb part of heat generated by reaction of metal fuel aluminum and water, the temperature of the working medium is raised to be superheated steam, then the working medium enters a steam turbine 5 to expand and work and drives a generator 6 to rotate and generate electricity, the working medium which has done work enters a condenser 7 through an outlet of the steam turbine 5, and the working medium is condensed to be water and enters the water feeding pump 8 again to enter the next cycle process.
The utility model discloses poly-generation power generation system based on metal fuel aluminium energy storage uses aluminium oxide as the raw materials, when renewable energy power generation is surplus or surplus, carries out the electrolysis to fused aluminium oxide through aluminium oxide electrolytic device 1, changes renewable energy electric power into the chemical energy of aluminium fuel through electrochemical reaction and stores. When the power generation of renewable energy sources in the power grid is insufficient, the chemical energy of the metal fuel aluminum is converted into electric energy through the alkali liquor reactor 2 and the power cycle conversion device so as to supplement the shortage of the power generation of the renewable energy sources.
The utility model discloses a concrete work engineering does:
when renewable energy resources in an electric network system in a certain region in the world are surplus for power generation, the aluminum oxide electrolysis device 1 is used for converting molten aluminum oxide into metal fuel aluminum through electrochemical reaction, so that the renewable energy resources are converted into chemical energy of the metal fuel aluminum for storage. The metal fuel aluminum has the advantages of high energy density, easy storage and transportation and the like, and can be traded globally like traditional fossil energy. When the renewable energy sources in the power grid system in a certain region in the global range are insufficient in power generation, the metal fuel aluminum can be obtained by developing global energy source trade, and then the chemical energy of the metal fuel aluminum is converted into electric energy by using the alkali liquor reactor 2 and the power cycle conversion device so as to supplement the insufficiency of the renewable energy sources in the power grid system in power generation. A reaction product NaAlO2 of metal fuel aluminum after reaction in an alkali liquor reactor 2 is converted by a NaAlO2 reactor 3 and an Al (OH)3 reactor 4 to generate aluminum hydroxide and aluminum oxide in sequence, the finally generated aluminum oxide is recovered and is transported to a region with surplus renewable energy power generation in the global scope by developing energy trade in the global scope, then the molten aluminum oxide is converted into the metal fuel aluminum by an electrochemical reaction by utilizing an aluminum oxide electrolysis device 1, and the renewable energy power generation is converted into chemical energy of the metal fuel aluminum for storage, so that the cyclic utilization is realized.
The above-mentioned embodiments further describe the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (3)

1. A poly-generation power generation system based on metal fuel aluminum energy storage is characterized in that: the aluminum electrolysis device comprises an aluminum oxide electrolysis device (1), wherein the cathode of the aluminum oxide electrolysis device (1) is communicated with a fuel inlet of an alkali liquor reactor (2), metal fuel aluminum generated by electrochemical reaction is fed into the alkali liquor reactor (2), the metal fuel aluminum and water generate exothermic reaction in the alkali liquor reactor (2) and generate hydrogen, and the chemical reaction equations are 2Al +6H 2O-2 Al (OH)3+3H2 and Al (OH)3+ NaOH-NaAlO 2+2H2O in sequence; a hydrogen outlet of the alkali liquor reactor (2) is communicated with an inlet of the hydrogen storage tank (9), and a solution outlet of the alkali liquor reactor (2) is communicated with a solution inlet of the NaAlO2 reactor (3); a solution outlet of the NaAlO2 reactor (3) is communicated with a solution inlet of the Al (OH)3 reactor (4), a thermal decomposition reaction 2Al (OH)3 ═ Al2O3+3H2O is carried out in the Al (OH)3 reactor (4), the temperature required by the reaction is 650-850 ℃, and the heat required by the reaction of the Al (OH)3 reactor (4) is provided by renewable energy sources; the outlet of the Al (OH)3 reactor (4) is communicated with the inlet of the molten electrolyte of the alumina electrolysis device (1) through a circulating pipeline; the gas inlet of the NaAlO2 reactor (3) is communicated with CO2 from a coal-fired power plant flue gas CO2 trapping device, in the NaAlO2 reactor (3), a NaAlO2 solution and CO2 react to generate Al (OH)3, and meanwhile, important chemical raw materials Na2CO3 and NaHCO3 can be generated;
the alkali liquor reactor (2) is connected with a power cycle conversion device.
2. A metal-fuel aluminum energy storage based poly-generation power generation system according to claim 1, wherein said power cycle conversion device comprises a steam turbine (5), a generator (6), a condenser (7) and a feed water pump (8); the working medium inlet of the alkali liquor reactor (2) is communicated with the outlet of the water feeding pump (8), the working medium outlet of the alkali liquor reactor (2) is communicated with the inlet of the steam turbine (5), the steam turbine (5) is coaxially connected with the generator (6), the working medium outlet of the steam turbine (5) is communicated with the working medium inlet of the condenser (7), and the working medium outlet of the condenser (7) is communicated with the working medium inlet of the water feeding pump (8).
3. A metal-fuel aluminum energy storage based poly-generation power generation system according to claim 1, wherein the electricity required for electrochemical reaction of the aluminum oxide electrolysis device (1) is provided by renewable energy power generation.
CN202021648304.6U 2020-08-10 2020-08-10 Poly-generation power generation system based on metal fuel aluminum energy storage Active CN212250169U (en)

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