CN113451627B - Carbon cycle device for high temperature reversible fuel cell - Google Patents
Carbon cycle device for high temperature reversible fuel cell Download PDFInfo
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- CN113451627B CN113451627B CN202110596800.4A CN202110596800A CN113451627B CN 113451627 B CN113451627 B CN 113451627B CN 202110596800 A CN202110596800 A CN 202110596800A CN 113451627 B CN113451627 B CN 113451627B
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- 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
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
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- 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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04014—Heat exchange using gaseous fluids; Heat exchange by combustion of reactants
- H01M8/04022—Heating by combustion
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- 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
- H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
- H01M8/0606—Combination of fuel cells with means for production of reactants or for treatment of residues with means for production of gaseous reactants
- H01M8/0612—Combination of fuel cells with means for production of reactants or for treatment of residues with means for production of gaseous reactants from carbon-containing material
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- 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
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
- H01M2008/1293—Fuel cells with solid oxide electrolytes
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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
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a carbon recycling device for a high-temperature reversible fuel cell, comprising: high temperature reversible fuel cells, gas turbines, generators, carbonizers, calciners, boilers, regenerators, syngas storage tanks, oxygen storage tanks, and related control valves. The outlet of the synthesis gas storage tank is connected with the inlet of the anode of the high-temperature reversible fuel cell, the outlet of the anode is connected with a gas turbine with a coaxial generator, the outlet of the gas turbine is connected with a carbonizer, a heat accumulator stores heat generated by the carbonizer and is connected with a calciner which provides heat for the calciner, the outlet of pyrolysis gas of the calciner is connected with the cathode of the high-temperature reversible fuel cell, the oxygen outlet of the high-temperature reversible fuel cell is connected with the inlet of the oxygen storage tank, and the outlet of synthesis gas is connected with the inlet of the synthesis gas storage tank. The invention utilizes the carbonizer to store carbon dioxide and water vapor, and is used for providing the required water vapor and carbon dioxide in an electrolysis mode. The device realizes the recycling of carbon dioxide during the operation of switching modes.
Description
Technical Field
The invention relates to the fields of new energy power generation technology and greenhouse gas emission reduction, in particular to a carbon circulating device for a high-temperature reversible fuel cell.
Background
China is a country with large fossil energy consumption, and carbon dioxide is used as a main product of fossil energy consumption, and a large amount of carbon dioxide comes from industrial and agricultural production, transportation and human life. In industrial and agricultural production, large amounts of carbon dioxide emissions are most typical of petrochemical industries and coal-fired power plants. At present, the treatment of carbon dioxide in China mainly comprises the following steps: the raw materials are used in chemical industry to produce chemical products; carbon dioxide is used in light industry to produce carbonated beverages, carbonated drinks, beer and the like; the heavy industry uses carbon dioxide capture technology to capture and sequester carbon dioxide.
In recent years, with the increasing maturity of new energy technology in the field of power generation, especially the rapid development of high temperature Reversible Solid Oxide Fuel Cells (sofc) in the field of clean energy, this makes how to utilize abundant carbon dioxide resource better solve the problem. The high-temperature reversible Solid Oxide Fuel cell has both the power generation characteristics of a high-temperature Solid Oxide Fuel Cell (SOFC) and the Electrolysis characteristics of a high-temperature Solid Oxide Electrolysis Cell (SOEC). Under the power generation mode, the high-temperature reversible fuel cell can directly utilize the synthesis gas rich in carbon and hydrogen to generate power due to the flexible selectivity of the high-temperature reversible fuel cell on fuel, and generates high-concentration carbon dioxide tail gas at the anode of the high-temperature reversible fuel cell by consuming the carbon, hydrogen synthesis gas and air; in the electrolysis mode, carbon dioxide and water vapor are co-electrolyzed to prepare carbon-rich and hydrogen-rich synthesis gas, and pure oxygen is obtained as a byproduct.
At present, the methods mainly adopted for carbon dioxide capture in the high-temperature reversible fuel cell are as follows: the carbon dioxide capturing unit is installed behind the tail gas, the process of the carbon dioxide capturing unit generally comprises a chemical absorption method, a chemical adsorption method, a physical adsorption method or a membrane separation method, and the carbon dioxide is separated and stored after passing through the process methods, so that the high-temperature reversible fuel cell consumes excessive energy in the aspect of capturing the carbon dioxide. When the high-temperature reversible fuel cell works in an electrolysis mode, the required carbon dioxide source is mainly provided by the carbon dioxide and water vapor mixed gas after industrial purification and treatment or the carbon dioxide separated and stored by a carbon dioxide capturing unit.
Because the calcium oxide has the advantages of high absorption efficiency, low cost, easy obtainment and the like in the aspect of absorbing carbon dioxide, and when calcium oxide reacts with carbon dioxide, huge heat is released, the heat accumulator is added to effectively store the part of energy, and by utilizing the chemical characteristic of the reaction of the calcium oxide and the carbon dioxide, can effectively store carbon dioxide gas in calcium carbonate solid, when carbon dioxide is needed, by pyrolyzing calcium carbonate at high temperature, can directly decompose and utilize the carbon dioxide stored in the calcium carbonate solid, which leads the high-temperature reversible fuel cell to be more convenient and faster in the aspect of recycling the carbon dioxide, reduces a plurality of unnecessary carbon dioxide separation and purification processes, the recycling of carbon dioxide in the tail gas of the high-temperature reversible fuel cell can be effectively realized, and the problems of the high-temperature fuel cell in the aspects of carbon dioxide emission, treatment, energy loss and the like are solved.
Disclosure of Invention
The invention provides a carbon circulating device for a high-temperature reversible fuel cell, and aims to realize the recycling of carbon dioxide and effectively solve the problem of carbon dioxide emission of the high-temperature reversible fuel cell through two working modes of the high-temperature reversible fuel cell and the chemical characteristic that calcium-based absorbs carbon dioxide.
The device includes: high temperature reversible fuel cells, gas turbines, generators, carbonizers, calciners, boilers, regenerators, syngas storage tanks, oxygen storage tanks, and related control valves.
The invention provides two different carbon circulating device modes for the high-temperature reversible fuel cell according to the functions realized by the high-temperature reversible fuel cell working mode, the carbonizer and the calcinator. The mode is that the carbonizer and the calcinator are independently separated, under the power generation mode of the high-temperature reversible fuel cell, exhaust gas from the gas turbine firstly enters the carbonizer, then the exhaust gas without carbon dioxide and water vapor returns to a fuel inlet of an anode of the high-temperature reversible fuel cell through a heat accumulator and a control valve, and a large amount of heat generated by the carbonizer is stored in the heat accumulator. In the electrolysis mode of the high-temperature reversible fuel cell, calcium hydroxide and calcium carbonate generated by carbonization reaction are sent into a calciner through a heat accumulator and a control valve, the calciner carries out high-temperature calcination on the calcium hydroxide and the calcium carbonate through heat provided by a boiler so as to decompose the calcium hydroxide and the calcium carbonate to generate calcium oxide, carbon dioxide and water vapor, the calcium oxide is sent back to the carbonizer through the control valve again, and the carbon dioxide and the water vapor are directly connected with the cathode of the high-temperature reversible fuel cell through the control valve without preheating treatment at high temperature.
And the carbonization and calcination integrated furnace is introduced into the second mode, so that the carbonization function of the carbonizer and the calcination and pyrolysis function of the calciner can be realized. In a power generation mode of the high-temperature reversible fuel cell, after exhaust gas from a gas turbine passes through a carbonization and calcination integrated furnace, carbon dioxide and water vapor are directly stored in calcium hydroxide and calcium carbonate, and then the exhaust gas returns to a fuel inlet of an anode of the high-temperature reversible fuel cell through a heat accumulator and a control valve. Under the electrolysis mode of the high-temperature reversible fuel cell, calcium hydroxide and calcium carbonate generated by carbonization reaction are returned to the carbonization and calcination integrated furnace through the heat accumulator again to generate calcium oxide, carbon dioxide and water vapor through high-temperature pyrolysis, and the carbon dioxide and the water vapor are directly sent to the cathode of the high-temperature reversible fuel cell through a control valve without preheating treatment at high temperature.
Compared with the prior art, the invention has the advantages that:
(1) by introducing the gas turbine, the temperature of tail gas at the outlet of the anode of the high-temperature reversible fuel cell is reduced after expansion and work is done, so that the temperature of exhaust gas reaching the carbonizer is matched with the carbonization temperature.
(2) In the high-temperature reversible fuel cell power generation mode, carbon dioxide is stored in calcium carbonate of the carbonizer, the carbon dioxide is not required to be extracted and stored through a complex purification technology, and in the electrolysis mode, the calcium carbonate is directly heated and decomposed in the calcining furnace to generate the carbon dioxide, so that the problem of energy consumption in the processes of carbon dioxide capture and storage is solved.
(3) The heat accumulator in the device can store the heat energy generated in the carbonizer, and fully utilize the heat energy during fuel preheating and calcium carbonate decomposition.
(4) After calcium carbonate and calcium hydroxide generated in the carbonizer are calcined in the calciner, carbon dioxide and water vapor generated in the calciner can be directly introduced into the cathode of the high-temperature reversible fuel cell for electrolysis without preheating treatment because the temperature of the calciner is close to the working temperature of the high-temperature reversible fuel cell.
Drawings
FIG. 1 is a schematic diagram and a structural diagram of an apparatus according to a first embodiment of the present invention;
fig. 2 is a schematic diagram and a schematic structural diagram of a device according to a second implementation of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
The invention relates to a carbon circulating device for a high-temperature reversible fuel cell, which mainly comprises a high-temperature reversible fuel cell 1, a gas turbine 2, a generator 3, a carbonizer 4, a calciner 5, a boiler 6, a heat accumulator 7, a synthetic gas storage tank 8, an oxygen storage tank 9, V1, V2, V3, V4, V5, V6, V7, V8 and V9 control valves. An anode tail gas outlet of a high-temperature reversible fuel cell 1 is connected with an inlet of a gas turbine 2, a generator 3 is coaxially connected with the gas turbine 2, a dead gas outlet of the gas turbine 2 is connected with a carbonizer 4, a gas outlet of the carbonizer 4 is connected with a hot end inlet of a heat accumulator 7, an outlet at the bottom of the carbonizer 4 is connected with a cold end inlet of the heat accumulator 7, a hot end outlet of the heat accumulator 7 is connected with an anode inlet through a control valve V3, a cold end outlet of the heat accumulator 7 is connected with an inlet of a calciner 5 through a control valve V7, a gas outlet of the calciner 5 is connected with a cathode of the high-temperature reversible fuel cell 1 through a control valve V5, a solid outlet is connected with the carbonizer 4 through a control valve V6, a synthetic gas outlet of the high-temperature reversible fuel cell 1 is connected with an inlet of a synthetic gas storage tank 8, an oxygen outlet of the high-temperature reversible fuel cell 1 is connected with an inlet of an oxygen storage tank 9 through a control valve V4, an outlet of the oxygen storage tank 9 is connected with a boiler 6 through a control valve V8, the boiler 6 is connected to the calcining furnace 5 through a control valve V9 to provide heat for calcining, the pretreated air is connected with the cathode inlet of the high-temperature reversible fuel cell 1 through a control valve V2, and the outlet of the synthesis gas storage tank 8 is connected with the anode fuel inlet of the high-temperature reversible fuel cell 1 through a control valve V1.
The second mode of the carbon circulating device for the high-temperature reversible fuel cell mainly comprises a high-temperature reversible fuel cell 1, a gas turbine 2, a generator 3, a carbonization and calcination integrated furnace 4, a boiler 5, a heat accumulator 6, a synthetic gas storage tank 7, an oxygen storage tank 8, V1, V2, V3, V4, V5, V6, V7, V8 and V9 control valves. An anode tail gas outlet of a high-temperature reversible fuel cell 1 is connected with an inlet of a gas turbine 2, a generator 3 is coaxially connected with the gas turbine 2, a dead gas outlet of the gas turbine 2 is connected with a carbonization and calcination integrated furnace 4, a hot end inlet of a heat accumulator 6 is connected with the carbonization and calcination integrated furnace 4, a hot end outlet is connected with an anode inlet of the high-temperature reversible fuel cell 1 through a control valve V3, a solid outlet of the carbonization and calcination integrated furnace 4 is connected with a cold end inlet of the heat accumulator 6 through a control valve V7, a cold end outlet of the heat accumulator 6 is connected with the bottom of the carbonization and calcination integrated furnace 4, a bottom outlet of the carbonization and calcination integrated furnace 4 is connected with a cathode of the high-temperature reversible fuel cell 1 through a control valve V5, a synthetic gas outlet of the high-temperature reversible fuel cell 1 is connected with an inlet of a synthetic gas storage tank 7, an oxygen outlet of the high-temperature reversible fuel cell 1 is connected with an inlet of an oxygen storage tank 8 through a control valve V4, and an outlet of the oxygen storage tank 8 is connected with a boiler 5 through a control valve V8, the boiler 5 is connected to the carbonization and calcination integrated furnace 4 through a control valve V9 to provide heat for calcination, the pretreated air is connected with the cathode inlet of the high-temperature reversible fuel cell 1 through a control valve V2, and the outlet of the synthesis gas storage tank 7 is connected with the anode fuel inlet of the high-temperature reversible fuel cell 1 through a control valve V1.
Specifically, in the first embodiment of the carbon cycle device for a high-temperature reversible fuel cell of the present invention, when the high-temperature reversible fuel cell 1 is operated in the power generation mode: the high-temperature reversible fuel cell 1 consumes the synthesis gas and the air from the synthesis gas storage tank 8 to generate electricity, the V1, V2, V3 and V6 control valves are opened, the V4, V5, V7, V8 and V9 control valves are closed, the calcinator 5 and the boiler 6 do not work at the moment, the heat accumulator 7 stores the heat from the carbonizer 4, and the synthesis gas which is not completely reacted in the high-temperature reversible fuel cell 1 returns to the anode inlet of the high-temperature reversible fuel cell 1 again through the carbonizer 4, the heat accumulator 7 and the control valve V3. When the high-temperature reversible fuel cell 1 is operated in the electrolysis mode: the high-temperature reversible fuel cell 1 consumes carbon dioxide and water vapor generated by the calcinator to carry out electrolysis, the control valves of V4, V5, V7, V8 and V9 are opened, the control valves of V1, V2, V3 and V6 are closed, the calcinator 5 and the boiler 6 work at the moment, the heat accumulator 7 releases heat from the carbonizer 4, calcium carbonate and calcium hydroxide generated in the carbonizer 4 are sent to the calcinator 5 through the control valve V7, and meanwhile the boiler 6 also provides heat for the work of the calcinator 5.
Specifically, in the second embodiment of the carbon cycle device for a high-temperature reversible fuel cell according to the present invention, when the high-temperature reversible fuel cell 1 is operated in the power generation mode: the control valves of the V1, the V2, the V3 and the V6 are opened, the control valves of the V4, the V5, the V7, the V8 and the V9 are closed, at the moment, the carbonization and calcination integrated furnace 4 works, the boiler 5 does not work, the heat accumulator 6 stores heat generated by the carbonization and calcination integrated furnace 4 through carbonization reaction, and the synthesis gas which is not completely reacted in the high-temperature reversible fuel cell 1 returns to the anode inlet of the high-temperature reversible fuel cell 1 again through the carbonization and calcination integrated furnace 4, the heat accumulator 6 and the control valve V3. When the high-temperature reversible fuel cell 1 is operated in the electrolysis mode: the control valves of the V4, the V5, the V7, the V8 and the V9 are opened, the control valves of the V1, the V2, the V3 and the V6 are closed, the carbonization and calcination integrated furnace 4 and the boiler 5 work at the moment, the heat accumulator 6 releases heat from the carbonization and calcination integrated furnace 4, and meanwhile the boiler 5 also provides heat for the operation of the carbonization and calcination integrated furnace 4.
Further, the main components of the synthesis gas in the synthesis gas storage tank 8 are hydrogen and carbon monoxide, and the synthesis gas enters the cathode gas of the high-temperature reversible fuel cell 1 through the control valve V2 to be preheated air.
Further, the high-temperature reversible fuel cell 1 can work in two modes of power generation and electrolysis, and consumes fuel synthesis gas and air to generate high-concentration carbon dioxide tail gas in the power generation mode; in the electrolysis mode, fuel synthesis gas and oxygen are generated by co-electrolysis of water vapor and carbon dioxide. The temperature of the two working modes is 800-1000 ℃.
Further, the carbonizer 4 absorbs carbon dioxide and water vapor by using the chemical property of calcium oxide, stores the carbon dioxide and the water vapor in calcium carbonate and calcium oxide, and releases a large amount of heat, and the reaction temperature is 500-700 ℃.
Further, the calcining furnace 5 is used for calcining calcium hydroxide and calcium carbonate at high temperature, steam and carbon dioxide generated by pyrolysis are directly sent to the cathode of the fuel cell through a control valve V5 without being preheated, and the temperature of the calcining furnace is 700-1000 ℃ when the calcining furnace works.
Further, the boiler 6 oxidant oxygen is provided from an oxygen storage tank 9, which provides heat for the pyrolysis of the calciner 5.
Further, the regenerator 7 stores the heat generated by the carbonizer 4, and one end of the regenerator feeds the unreacted synthesis gas of the high-temperature reversible fuel cell 1 to the anode fuel inlet of the high-temperature reversible fuel cell through a control valve V3, and the other end of the regenerator feeds the calcium hydroxide and calcium carbonate generated by the carbonizer 4 to the calciner 5 through a control valve V7.
Further, in the second embodiment of the carbon circulation device for a high-temperature reversible fuel cell according to the present invention, the carbonization/calcination integrated furnace 4 can realize both the carbonization function of the carbonizer and the calcination/pyrolysis function of the calciner, and when the high-temperature reversible fuel cell 1 is in the power generation mode, the carbonization function of the carbonizer is realized by the carbonization/calcination integrated furnace 4; when the high-temperature reversible fuel cell 1 is in a power generation mode, the carbonization and calcination integrated furnace 4 realizes the calcination pyrolysis function of a calciner.
The present invention is not limited to the above embodiments, and those skilled in the art can make modifications to the embodiments without inventive contribution as required after reading the present specification, but all the modifications are protected by patent law within the scope of the appended claims.
Claims (6)
1. A carbon cycle device for a high temperature reversible fuel cell, comprising: high temperature reversible fuel cell, gas turbine, generator, carbonizer, burning furnace, boiler, heat accumulator, synthetic gas storage tank, oxygen storage tank and relevant control valve, its characterized in that:
the tail gas outlet of the anode of the high-temperature reversible fuel cell (1) is connected with the inlet of a gas turbine (2), a generator (3) is coaxially connected with the gas turbine (2), the exhaust gas outlet of the gas turbine (2) is connected with a carbonizer (4), the gas outlet of the carbonizer (4) is connected with the hot end inlet of a heat accumulator (7), the bottom outlet of the carbonizer (4) is connected with the cold end inlet of the heat accumulator (7), the hot end outlet of the heat accumulator (7) is connected with the anode inlet through a control valve (V3), the cold end outlet of the heat accumulator (7) is connected with the inlet of a calciner (5) through a control valve (V7), the gas outlet of the calciner (5) is connected with the cathode of the high-temperature reversible fuel cell (1) through a control valve (V5), the solid outlet is connected with the carbonizer (4) through a control valve (V6), the synthetic gas outlet of the high-temperature reversible fuel cell (1) is connected with the inlet of a synthetic gas storage tank (8), and the oxygen outlet of the high-temperature reversible fuel cell (1) is connected with the inlet of an oxygen storage tank (9) through a control valve (V4) An outlet of an oxygen storage tank (9) is connected with a boiler (6) through a control valve (V8), the boiler (6) is connected with a calcining furnace (5) through a control valve (V9) to provide heat for calcining, pretreated air is connected with a cathode inlet of a high-temperature reversible fuel cell (1) through a control valve (V2), an outlet of a synthetic gas storage tank (8) is connected with an anode fuel inlet of the high-temperature reversible fuel cell (1) through a control valve (V1), and the synthetic gas storage tank (8) is mixed gas of hydrogen and carbon monoxide;
the carbonizer (4) absorbs carbon dioxide and water vapor generated in the power generation mode of the high-temperature reversible fuel cell (1) by utilizing the chemical property of calcium oxide, stores the carbon dioxide and the water vapor in calcium carbonate and calcium hydroxide, and the reaction temperature is 500-700 ℃;
when the high-temperature reversible fuel cell (1) works in a power generation mode, the control valves (V1), (V2), (V3) and (V6) are opened, the control valves (V4), (V5), (V7), (V8) and (V9) are closed, the calcining furnace (5) and the boiler (6) do not work, synthesis gas which is not completely reacted in the high-temperature reversible fuel cell (1) returns to the anode inlet of the high-temperature reversible fuel cell (1) again through the carbonizer (4), the heat accumulator (7) and the control valve (V3), and the heat accumulator (7) stores heat released from the carbonizer (4); when the high-temperature reversible fuel cell (1) works in an electrolysis mode, the control valves (V4), (V5), (V7), (V8) and (V9) are opened, the control valves (V1), (V2), (V3) and (V6) are closed, the calcining furnace (5) and the boiler (6) work, calcium carbonate and calcium hydroxide generated in the carbonizer (4) are sent to the calcining furnace (5) through the heat accumulator (7) and the control valve (V7), the heat accumulator (7) releases stored heat, and the boiler (6) also provides heat for the calcining furnace (5) to work.
2. The carbon cycle device for a high-temperature reversible fuel cell according to claim 1, characterized in that the high-temperature reversible fuel cell (1) is switchable between two modes of power generation in which fuel syngas and air are consumed and electrolysis; under the electrolysis mode, water vapor and carbon dioxide are co-electrolyzed to generate fuel synthesis gas and oxygen, and the operating temperature under the two working modes is 800-1000 ℃.
3. The carbon circulation device for the high-temperature reversible fuel cell according to claim 1, wherein the high-temperature reversible fuel cell (1) uses the calciner (5) to calcine calcium hydroxide and calcium carbonate in the carbonizer (4) at high temperature in an electrolysis mode, high-temperature water vapor and carbon dioxide are generated and directly sent to the cathode inlet of the high-temperature reversible fuel cell (1) through the control valve (V5), and the calciner (5) operates at a temperature of 700-1000 ℃.
4. The carbon cycle apparatus for high temperature reversible fuel cells according to claim 1, characterized in that the oxygen of the boiler (6) combustion process is provided by an oxygen storage tank (9) providing heat for the calciner (5).
5. The carbon cycle device for a high-temperature reversible fuel cell according to claim 1, characterized in that the regenerator (7) stores heat generated by the carbonizer (4) when absorbing water vapor and carbon dioxide, and the heat stored in the regenerator (7) is supplied to the calciner (5) when the high-temperature reversible fuel cell (1) is electrolyzed.
6. The carbon recycling device for high-temperature reversible fuel cells according to claim 1, wherein the carbonizer (4) and the calciner (5) may be separate devices or may be integrated, and absorb water vapor and carbon dioxide during power generation and release water vapor and carbon dioxide during electrolysis.
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