Carbon dioxide capture system

Abstract

This technology allows for the simple and efficient separation and capture of carbon dioxide originating from biomass and waste, without the need for the development of separation and capture facilities using carbon dioxide absorption liquids, adsorbents, or separation membranes. It also recovers the recovered carbon dioxide gas as liquefied carbon dioxide or solid carbon, which is easy to transport, use, and fix, thereby reducing carbon dioxide emissions associated with the removal of carbon dioxide from the atmosphere and the combustion of waste. [Solution] Fuel gas is obtained by methane fermentation of waste or by pyrolysis gasification under anoxic conditions or with oxygen supply, and the obtained fuel gas is reacted with oxygen to generate electricity. After power generation, the exhaust gas is cooled while recovering and utilizing the exhaust gas heat, and the moisture in the exhaust gas is condensed and liquefied and removed. The resulting condensed water and the generated electricity are used to produce oxygen needed for pyrolysis gasification or oxygen-utilizing power generation, thereby recovering high-concentration carbon dioxide gas. Furthermore, the recovered carbon dioxide gas is compressed and liquefied using the generated electricity to obtain liquefied carbon dioxide or dry ice, or solid carbon or carbon monoxide is obtained by molten salt electrolysis using the generated electricity.

Description

[Technical Field]

[0001] The present invention relates to a carbon dioxide separation and capture system. [Background technology]

[0002] Patent Document 1 describes a method and system for separating and recovering carbon dioxide gas from biogas using a carbon dioxide separation membrane, and recovering solid carbon from the separated and recovered carbon dioxide gas, which can be easily immobilized and used industrially. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-036490 Summary of the Invention [Problem to be solved by the invention]

[0004] When separating and recovering carbon dioxide from carbon dioxide-containing gases such as air, combustion exhaust gas, and biogas, there are various methods, including the membrane separation method using a carbon dioxide separation membrane as described in prior art, the chemical absorption method using an absorption liquid, and the physical adsorption method using an adsorbent. However, all of these methods require a separation membrane device, an absorption liquid circulation and regeneration facility, or an adsorption and desorption facility to separate and recover carbon dioxide, which poses the problem of increased installation space and capital investment costs for the equipment.

[0005] Furthermore, in order to solve the above problems, the Oxy-fuel method is known as a method for easily separating and capturing carbon dioxide gas without using a separation membrane, absorption liquid, absorbent, etc., by simply supplying oxygen gas to a hydrocarbon fuel to cause a reaction, and cooling the resulting exhaust gas to remove moisture. However, there is an issue in that no method has been disclosed for producing pure oxygen, which can be a factor in increasing costs and carbon dioxide emissions, by producing, supplying, and using it within the carbon dioxide separation and capture system, thereby eliminating the need to procure oxygen gas from outside the carbon dioxide separation and capture system, and further minimizing or eliminating the need to procure electricity and water from outside the system by using electricity and water generated within the system to provide the electricity and water required to produce oxygen gas within the carbon dioxide separation and capture system.

[0006] Furthermore, there is a problem that no disclosure has been made of a method for utilizing the oxygen and hydrogen generated during the electrolysis of water to promote oxy-fuel combustion and the gasification reaction in a gasifier, or a method or device for generating electricity using hydrogen, and then using the resulting electricity to separate and recover carbon dioxide gas, which can then be converted into liquefied carbon dioxide or solid carbon that can be easily stored underground or used as a valuable raw material, and then recovered.

[0007] The object of the present invention is to provide a method and apparatus for separating and recovering carbon dioxide gas from the atmosphere via biomass in a simple manner, using energy and water obtained from waste, from organic waste including agricultural and livestock biomass and plant biomass that have absorbed carbon dioxide from the atmosphere, as well as fossil fuel-derived products such as waste plastics, textiles, and paper, without the need for carbon dioxide separation and recovery equipment such as chemical absorption solutions, adsorbents, or separation membranes; to reduce carbon dioxide emissions associated with the combustion of fossil fuel-derived waste, and to convert the obtained carbon dioxide gas into liquefied carbon dioxide, dry ice, solid carbon, etc., which are easy to transport, immobilize, and effectively use, and to recover the carbon dioxide gas. [Means for solving the problem]

[0008] The carbon dioxide separation and capture system to which the present invention is applicable includes: a waste gasification unit that ferments waste or gasifies it through a pyrolysis reaction either in an oxygen-free environment or with oxygen supplied, thereby generating fuel gas; an oxygen-supplied power generation unit that supplies oxygen gas to the fuel gas generated from the waste gasification unit and generates electricity by reacting hydrocarbons in the gas with oxygen; a waste heat recovery unit that recovers exhaust heat from exhaust gas discharged from the power generation unit to cool the exhaust gas; a carbon dioxide gas separation and capture unit that cools the exhaust gas discharged from the exhaust heat recovery unit with cold heat obtained from a refrigerator driven by the exhaust heat recovery unit or a refrigerator driven by the power generation output obtained from the power generation unit, thereby condensing and liquefying water vapor in the exhaust gas and purifying and recovering high-concentration carbon dioxide gas and condensed water; and a water electrolysis unit that electrolyzes water using the condensed water recovered from the carbon dioxide gas separation and capture unit and the power generated by the power generation unit, thereby generating oxygen to be supplied to the power generation unit and also recovering hydrogen obtained by the electrolysis of water.

[0009] The waste gasification unit may be a methane fermentation tank that performs methane fermentation on agricultural residues, food waste, sewage sludge, etc., which have a high moisture content, or a gasification furnace that heats waste materials such as thinned wood and pruned branches, which have a low moisture content, resource-rich crops with a high carbon dioxide absorption capacity, and waste plastics, textiles, and paper in an oxygen-free environment or a pure oxygen environment to generate combustible gas.

[0010] Furthermore, the oxygen supply type power generation device may be a gas engine power generation device or a gas turbine power generation device that generates power by burning biomethane in biogas or gasification gas whose main components are a mixed gas of carbon monoxide and hydrogen, or a fuel cell power generation device. However, since all of these power generation devices contain unreacted hydrocarbons and oxygen in the exhaust gas, in order to minimize the concentrations of these, it is desirable to have a catalytic combustion device that completely oxidizes either hydrogen or oxygen obtained from the electrolysis of water by supplying it into the exhaust gas at a controlled flow rate.

[0011] Furthermore, when cooling the exhaust gas that is a mixture of carbon dioxide and water vapor emitted from the catalytic combustion device, the mixture is recovered by circulating steam, hot water, or a heat medium through an exhaust gas heat exchanger, and a refrigerator driven by the obtained exhaust heat is used to further cool the low-temperature exhaust gas emitted from the exhaust gas heat exchanger through a heat exchanger for cooling the low-temperature exhaust gas using the cold heat obtained from the refrigerator, and all of the water vapor in the low-temperature exhaust gas is condensed and liquefied.This makes it possible to efficiently separate and recover carbon dioxide gas originating from biogas and waste by utilizing the heat of reaction between the generated combustible gas and pure oxygen.

[0012] Here, it is preferable to use the electrolysis reaction of water to produce the oxygen to be supplied to the gasification furnace and power generation system. The water required for the reaction is obtained by recovering and purifying drain water discharged from the exhaust gas heat exchanger and the heat exchanger for cooling low-temperature exhaust gas. The electricity required for the reaction is obtained not only from the power generated by an oxygen supply power generation system operated using fuel gas produced from biomass or waste, but also from a hydrogen supply power generation system which recovers hydrogen produced by electrolysis of water and reacts it with oxygen in the air to generate electricity. When the power generated by the oxygen supply power generation system is insufficient, it is preferable to use the power generated by the hydrogen supply power generation system.

[0013] Furthermore, when there is a shortage of water required for the reaction, tap water, rainwater, rivers, lakes, or groundwater can be taken in and purified and used to make up the water supply. When there is a shortage of electricity required for the reaction, it is desirable to install a stable renewable energy electricity supply facility adjacent to this system, which is composed of a renewable energy power generation facility such as a solar power generation facility and a storage battery, and charge the surplus electricity and discharge it when a power shortage occurs, thereby ensuring stable operation of the water electrolysis device and a stable supply of the required oxygen and electricity.

[0014] The water electrolysis device may be selected from an appropriate system such as an alkaline electrolysis system, a system using a solid polymer membrane, or a system using a solid oxide membrane. When the oxygen supply type power generation device or renewable energy power generation facility constituting the system is short of power, the system may receive power from the power grid to make up for the shortage, or may receive power from a storage battery to charge it and discharge it when the shortage occurs.

[0015] Furthermore, this system may be equipped with a carbon dioxide compression and liquefaction device for converting the separated and recovered carbon dioxide gas into high-pressure gas, liquefied carbon dioxide, or dry ice suitable for transportation and industrial use, and a system for recovering it as solid carbon or carbon monoxide gas by supplying electricity to electrolyze it while supplying it into molten salt, and it is desirable to supply the driving power for these devices with electricity generated by the oxygen-supply power generation device, renewable energy power generation facility, or hydrogen-supply power generation facility, so that carbon dioxide products suitable for industrial use, such as solid carbon, can be recovered without additional carbon dioxide emissions. [Effects of the Invention]

[0016] The present invention eliminates the need for equipment equipped with special materials such as carbon dioxide absorbents, adsorbents, and separation membranes. Using small, simple equipment, it is possible to easily and efficiently capture carbon dioxide generated in the oxidation reaction of waste using electricity, heat, and water obtained from the waste, and to recover the carbon dioxide gas from the captured gas as liquefied carbon dioxide, dry ice, or solid carbon, which can be easily transported, used, and immobilized. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a diagram showing the overall configuration of a carbon dioxide separation and capture system according to a first embodiment. [Figure 2] FIG. 1 is a diagram showing the overall configuration of a carbon dioxide separation and capture system according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. [First embodiment] Figure 1 is a diagram showing the overall configuration of a carbon dioxide separation and capture system according to a first embodiment. The carbon dioxide separation and capture system 1 separates and captures carbon dioxide from the atmosphere via biomass, capturing it as liquefied carbon dioxide suitable for industrial use or transportation to an underground storage tank. This system is installed in areas where biomass resources with high moisture content that can be fermented into methane are generated, such as agricultural residues, livestock facilities, food waste, and sewage treatment plants.

[0019] The carbon dioxide separation and capture system 1 according to the first embodiment comprises a biomass methane fermentation tank 2, a gas premixing compressor 3 that takes in biogas generated from the methane fermentation tank and pure oxygen and supplies it as a compressed premixed gas, an oxygen combustion spark ignition gas engine 4 that is driven by oxygen combustion of the premixed gas, and a generator 5 connected to the gas engine, and is capable of generating electricity derived from biomass.

[0020] Furthermore, at the high-temperature combustion exhaust outlet discharged from the gas engine 4, a catalytic combustion device 6 is installed to completely oxidize the unreacted hydrocarbon components and unreacted oxygen contained in the exhaust gas, minimizing their residual concentrations and turning it into a mixture of carbon dioxide and water vapor. The outlet flow path of this catalytic combustion device is equipped with a gas composition measurement and analysis device 7 to measure and analyze the concentrations of hydrocarbon components and oxygen in the exhaust gas, and a hydrogen gas control and addition device 9 and an oxygen gas control and addition device 10 to supply controlled flow rates of hydrogen and oxygen to the inlet flow path of the catalytic combustion device based on control signals from a gas addition amount control device 8 which controls the amount of oxygen and hydrogen obtained by electrolysis of water based on the measurement and analysis results of the measurement and analysis device. The exhaust gas at the outlet of the catalytic combustion device becomes a mixture of carbon dioxide and water vapor, and is oxidized in the catalytic combustion device so that the concentrations of both unreacted hydrocarbon components and unreacted oxygen are minimized.

[0021] The exhaust gas that has been completely oxidized in this way through the catalytic combustion device has its temperature reduced by recovering exhaust heat through exhaust gas heat exchanger 11, and some of the water vapor contained in the exhaust gas is condensed and liquefied. The exhaust gas that has been cooled after passing through exhaust gas heat exchanger 11 is supplied to fermenter heat exchanger 12, which heats the methane fermenter 2 to promote methane fermentation in the fermenter, where its temperature is further reduced. The cold energy supplied via a circulating refrigerant from absorption chiller 13, which is driven by the recovered exhaust heat, is then supplied to exhaust gas cooler 14, where it is further cooled and the water is removed by condensation and liquefaction, resulting in high-concentration carbon dioxide gas.

[0022] The recovered carbon dioxide gas is then compressed to high pressure in an electrically driven gas compressor 15, and then liquefied in an electrically driven carbon dioxide liquefaction device 16, and filled into liquefied carbon dioxide tanker trucks as liquefied carbon dioxide suitable for transportation and industrial use.

[0023] The oxygen supplied to the gas compressor 3 here is generated by the power generated by the generator 5 of the oxygen combustion gas engine, and oxygen obtained from a water electrolysis device 18, which electrolyzes water by collecting and purifying condensed water obtained in the process of lowering the temperature of the exhaust gas from an exhaust gas heat exchanger 11, a fermenter heat exchanger 12, and an exhaust gas cooler 14, and supplying it by driving a water supply pump 17.

[0024] In addition, the hydrogen obtained by electrolysis of water is used in a fuel cell power generation facility 19 that is powered by oxygen in the air, and the electricity generated by the fuel cell power generation is supplied and utilized via a storage battery 20 that adjusts the amount of power consumed to operate the carbon dioxide separation and capture system 1, including the power supplied to the water electrolysis device 18.However, if the amount of hydrogen generated is in excess of the amount required to operate the system, it can be compressed, filled into cylinders, and supplied as an industrial gas.

[0025] If the power consumption required to operate the carbon dioxide separation and capture system 1 cannot be covered by the power generated by the oxygen combustion gas engine generator 5 or the fuel cell power generation equipment 19, the system can be operated without receiving power from the power grid 22 by supplying power generated by the solar power generation equipment 21 connected to the storage battery 20, or by charging the storage battery with surplus generated power so that it can be discharged when there is a power shortage. However, depending on the installation location, the system can also be operated by receiving or charging power from the power grid to make up for power shortages.

[0026] With this configuration, the carbon dioxide separation and capture system 1 of the first embodiment does not require the introduction of equipment that uses carbon dioxide absorption liquid, adsorbent, or separation membrane, and can easily and efficiently separate and capture carbon dioxide originating from biomass using small, simple equipment, utilizing electricity, heat, and water obtained from biomass, and can also recover liquefied carbon dioxide from the captured carbon dioxide gas, which is easy to transport, use, and immobilize.

[0027] Second Embodiment 2 is a diagram showing the overall configuration of a carbon dioxide separation and capture system according to a second embodiment. The second embodiment is similar to the first embodiment in that it separates and captures atmospheric carbon dioxide via biomass that has absorbed the carbon dioxide from the atmosphere, but differs in that it recovers solid carbon from the separated and captured carbon dioxide gas, suitable for industrial use or underground storage. Another difference is that the carbon dioxide separation and capture system of this embodiment is suitable for plant biomass resources that are difficult to ferment into methane, such as forest thinnings and pruned branches, and is deployed and used in areas where biomass resources with low moisture content are generated or accumulated, such as mountain forests and waste disposal sites.

[0028] In this system, the biogas generating means is an oxygen-blown gasifier 23 to which oxygen is supplied, and the fuel gas generated from the gasifier is supplied to an oxygen combustion gas turbine 25 via a fuel gas supply blower 24, which supplies gas to an oxygen combustor via a purification device such as a bag filter.

[0029] Another difference is that after exhaust heat is recovered from the exhaust gas of the oxygen combustion gas turbine power generation plant to drive a refrigerator, the exhaust gas is supplied to a biomass dryer 26, which heats and dries the biomass to be supplied to the gasification furnace, where the exhaust heat is utilized and then supplied to an exhaust gas cooler. When the moisture in the biomass generated by the biomass dryer is cooled by a radiator 27, condensed water is recovered and supplied to a water electrolysis device.

[0030] Furthermore, the recovered and pressurized carbon dioxide gas is supplied to a molten salt electrolysis device 28, and the molten salt electrolysis device is supplied with power via a storage battery 20, so that the carbon dioxide supplied to the molten salt electrolysis device is electrolyzed into solid carbon and oxygen, and the solid carbon generated in the molten salt electrolysis device is recovered by a solid carbon recovery motor 29, and the generated oxygen is supplied to an oxygen-blown gasifier and an oxygen combustion gas turbine power generation device. However, the other configurations and functions are the same as those of the first embodiment.

[0031] In this way, like the first embodiment, the second embodiment separates and captures atmospheric carbon dioxide via biomass that has absorbed it, but by using plant biomass with a low moisture content, it becomes possible to capture solid carbon that is suitable for industrial use or for underground storage.

[0032] In this system, hydrogen and oxygen are generated by electrolysis of water and carbon dioxide, and each is supplied and consumed according to the demand of the system. However, if surplus hydrogen or oxygen is generated that exceeds the demand of the system, it can be filled into transportable cylinders as compressed gas and supplied as an industrial gas suitable for industrial use, just like the first embodiment.

[0033] The obtained solid carbon may be used as a raw material for carbon materials, or may be stored underground or in water to be used as a means for capturing, removing, and fixing carbon dioxide in the atmosphere. [Industrial Applicability]

[0034] 1 and 2, the resources supplied are not limited to biomass, but may be applied to waste plastics, paper, textiles, etc., and may be used as a means for suppressing carbon dioxide emissions into the atmosphere associated with waste incineration. Furthermore, the method for generating electricity using biogas and oxygen that constitutes this system is not limited to a gas engine or gas turbine generator, but may be a fuel cell power generation facility that operates by supplying biogas and oxygen separately using a gas blower.

[0035] Furthermore, the method of removing moisture and recovering condensed water by cooling and dehumidifying exhaust gas, which is a mixture of carbon dioxide and water vapor generated by the power generation system, is not limited to an absorption chiller that uses the waste heat of the exhaust gas, but may also use an adsorption chiller or a desiccant dehumidifier, or may supply cold energy obtained from a heat pump chiller or turbo chiller that is driven by power generated by the power generation system, power discharged from a storage battery, or power of renewable energy origin that is supplied from a power grid.

[0036] In addition, if moisture removal by cooling the exhaust gas from the power generation unit is sufficiently achieved by recovering exhaust heat to drive the refrigerator and heating the biomass fermentation tank, and there is surplus cold energy obtained from the exhaust heat, it can be configured to supply the cold energy for cooling when the recovered carbon dioxide gas is compressed and then cooled to liquefy carbon dioxide, thereby reducing or eliminating the need for power supply to the carbon dioxide cooling unit.

[0037] As such, the above-described embodiments are merely illustrative, and anything that has substantially the same configuration as the technical idea described in the claims of the present invention and exhibits similar effects is included within the technical scope of the present invention. [Explanation of symbols]

[0038] 1...Carbon dioxide separation and capture system 2...Methane fermentation tank 3...Gas premixing compressor 4...Oxygen combustion spark ignition gas engine 5...Generator 6...Catalytic combustion device 7...Gas composition measurement and analysis equipment 8...Gas addition amount control device 9...Hydrogen gas control addition device 10...Oxygen gas control addition device 11...Exhaust gas heat exchanger 12...Methane fermentation tank heat exchanger 13...Absorption chiller 14...Exhaust gas cooling device 15...Carbon dioxide gas compressor 16...Carbon dioxide liquefaction device 17...Water supply pump 18...Water electrolysis device 19...Fuel cell power generation equipment 20...Storage battery 21...Solar power generation equipment 22…Power system 23...Oxygen-blown gasifier 24...Fuel gas supply blower 25...Oxygen combustion gas turbine 26...Biomass drying equipment 27...Radiator 28...Molten salt electrolysis device 29...Solid carbon capture motor

Claims

1. a waste fermentation unit that ferments waste to generate fuel gas; an oxygen supply type power generation system that generates power by mixing oxygen gas with the fuel gas generated by the waste fermentation unit and reacting the fuel components contained in the fuel gas with the oxygen; an exhaust heat recovery system that recovers heat from the exhaust gas of the oxygen supply type power generation system, cools the exhaust gas, and recovers moisture in the exhaust gas by condensing and liquefying it; and a refrigerator that is driven by the heat recovered by the exhaust heat recovery system or by cold heat supplied from a refrigerator that is driven by the power generation output obtained from the power generation system. an exhaust gas cooling device that cools exhaust gas discharged from the exhaust gas recovery system and condenses and liquefies the moisture in the exhaust gas for recovery; a carbon dioxide gas recovery unit that removes impurities from carbon dioxide gas from which moisture contained in the exhaust gas has been removed by condensation and liquefaction via the exhaust heat recovery device and the exhaust gas cooling device, and recovers it as high-concentration carbon dioxide gas; and a water electrolysis device that receives purified condensed water recovered from the exhaust heat recovery device and the exhaust gas cooling device, electrolyzes water with power generated by the power generation device, generates oxygen to be supplied to the power generation device, and also recovers hydrogen obtained by the electrolysis of water, a catalytic combustion device disposed in an exhaust gas flow path between the oxygen supply type power generation device and the exhaust heat recovery device, which oxidizes unreacted fuel components in the exhaust gas and reacts unreacted oxygen with hydrogen to produce water vapor; an exhaust gas composition analyzer for measuring the concentrations of unreacted fuel components and unreacted oxygen in the exhaust gas, the analyzer being disposed in an exhaust gas flow path between the catalytic combustion device and the exhaust heat recovery device; a gas supply device that adjusts the flow rates of oxygen and hydrogen obtained from a water electrolysis device and additionally supplies them to an upstream flow path of the catalytic combustion device; a supply amount control device that controls the supply amounts of oxygen and hydrogen from a gas supply device that supplies oxygen and hydrogen in a flow path upstream of the catalytic combustion device in accordance with the measurement results of the exhaust gas composition analyzer; A carbon dioxide separation and capture system characterized in that the supply amount control device controls the amount of oxygen and hydrogen supplied from the gas supply device so that both the unreacted fuel components and the unreacted oxygen concentration in the exhaust gas discharged from the catalytic combustion device are minimized.

2. a waste gasifier that heats waste in an oxygen-free state or while oxygen is being supplied, and generates fuel gas by thermal decomposition reaction; an oxygen-supplied power generation system that generates power by supplying oxygen gas to the fuel gas generated by the waste gasifier and supplying oxygen gas to the fuel gas supplied from the waste gasifier, and reacting the fuel components contained in the fuel gas with the oxygen; an exhaust heat recovery system that recovers heat from the exhaust gas of the oxygen-supplied power generation system, cools the exhaust gas, and recovers moisture in the exhaust gas by condensing and liquefying it; and a refrigerator that uses the heat recovered by the exhaust heat recovery system or cold energy supplied from a refrigerator that is driven by the power output obtained from the power generation system to generate power. an exhaust gas cooling device that cools the exhaust gas discharged from the exhaust heat recovery device and condenses and liquefies the moisture in the exhaust gas for recovery; a carbon dioxide gas recovery section that removes impurities from the carbon dioxide gas from which moisture contained in the exhaust gas has been removed by condensation and liquefaction via the exhaust heat recovery device and the exhaust gas cooling device, and recovers it as high-concentration carbon dioxide gas; and a water electrolysis device that receives purified condensed water recovered from the exhaust heat recovery device and the exhaust gas cooling device, electrolyzes water with generated power obtained from the power generation device, generates oxygen to be supplied to either or both of the waste gasification furnace and the power generation device, and also recovers hydrogen obtained by the electrolysis of water. a catalytic combustion device disposed in an exhaust gas flow path between the oxygen supply type power generation device and the exhaust heat recovery device, which oxidizes unreacted fuel components in the exhaust gas and reacts unreacted oxygen with hydrogen to produce water vapor; an exhaust gas composition analyzer for measuring the concentrations of unreacted fuel components and unreacted oxygen in the exhaust gas, the analyzer being disposed in an exhaust gas flow path between the catalytic combustion device and the exhaust heat recovery device; a gas supply device that adjusts the flow rates of oxygen and hydrogen obtained from a water electrolysis device and additionally supplies them to an upstream flow path of the catalytic combustion device; a supply amount control device that controls the supply amounts of oxygen and hydrogen from a gas supply device in an upstream flow path of the catalytic combustion device in accordance with the measurement results of the exhaust gas composition analyzer; A carbon dioxide separation and capture system characterized in that the supply amount control device controls the amount of oxygen and hydrogen supplied from the gas supply device so that both the unreacted fuel components and the unreacted oxygen concentration in the exhaust gas discharged from the catalytic combustion device are minimized.

3. The carbon dioxide separation and capture system according to claim 1, A carbon dioxide separation and capture system characterized in that hydrogen recovered from the electrolysis device is added and supplied to the oxygen supply type power generation device, thereby promoting the chemical reaction of the oxygen supply type power generation device.

4. In the carbon dioxide separation and capture system according to claim 2, A carbon dioxide separation and capture system, characterized in that hydrogen recovered from the electrolyzer is added and supplied to the waste gasifier, thereby promoting a chemical reaction in the waste gasifier.

5. The carbon dioxide separation and capture system according to any one of claims 1 to 4, a renewable energy power generation facility or a hydrogen supply power generation facility that generates electricity using hydrogen obtained from the electrolysis device and oxygen in the air; further comprising a storage battery that charges and discharges surplus power from the power generation facility; A carbon dioxide separation and capture system characterized in that when there is a shortage of electricity for electrolyzing water, the shortage is made up by supplying the power generation output of the renewable energy power generation facility or the hydrogen supply type power generation facility, and when there is a surplus of power generation output, the surplus power is charged into the storage battery, and when the power for electrolyzing water cannot be fully supplied by the power generated by the renewable energy power generation facility or the hydrogen supply type power generation facility, the surplus power is made up by discharging from the storage battery, and when even discharging from the storage battery cannot make up the surplus, it is made up by receiving power from the grid.

6. The carbon dioxide separation and capture system according to claim 1 or 2, a gas compressor for the separated and recovered carbon dioxide gas; a carbon dioxide liquefaction device or a dry ice production device that cools the high-pressure carbon dioxide gas obtained from the gas compressor to produce liquefied carbon dioxide or dry ice; A carbon dioxide separation and capture system characterized in that the carbon dioxide gas compressor is driven by electricity supplied from the oxygen supply type power generation device, and the liquefaction device or the dry ice production device is driven by either or both of the electricity supplied from the oxygen supply type power generation device and the cold heat obtained from the refrigerator.

7. The carbon dioxide separation and capture system according to claim 1 or 2, The system further includes a device for electrolyzing the separated and recovered carbon dioxide gas, A carbon dioxide separation and capture system characterized in that separated and captured carbon dioxide gas is converted into either solid carbon or carbon monoxide gas, or both, and then captured.

8. 3. A carbon dioxide separation and capture system according to claim 1 or 2, characterized in that the power consumption of the power-consuming equipment constituting the carbon dioxide separation and capture system is supplied from the oxygen supply type power generation device, thereby minimizing or eliminating the use of electricity received from the power grid.

9. 2. The carbon dioxide separation and capture system according to claim 1, further comprising a heat exchanger provided on a flow path of the exhaust gas from the exhaust heat recovery device until the exhaust gas is supplied to the exhaust gas cooling device, A carbon dioxide separation and capture system, characterized in that the exhaust gas is cooled and condensed water is recovered while the waste fermentation section is heated through the heat exchanger.

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