POWER GENERATING PLANT
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Accused Products
Abstract
Coal is reacted in a furnace 22 to obtain a coal gasification gas. The coal gasification gas is cooled by a gas cooler 23, passed through a porous filter 24, and desulfurized by a desulfurizer 25 to produce a CO-containing gas as an anode. The CO gas-containing gas is subjected to an exothermic reaction in a shift reactor 26 to form H2 and CO2, and the anode gas containing H2 is supplied to an anode 7 of MCFC 2. Thus, in the absence of an extra heat source and a heat exchange source, a desired anode gas is obtained from the coal gasification gas, and with heat buildup of the MCFC 2 being inhibited and its performance being maintained, reduction of CO2 is taken into consideration. A power generating plant equipped with the MCFC 2 capable of using a coal gasification fuel substantially containing a CO gas is thus achieved.
48 Citations
22 Claims
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1-11. -11. (canceled)
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12. A power generating plant, comprising:
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anode gas generation means for generating a CO gas-containing gas, which substantially contains a CO gas, as an anode gas; cathode gas generation means for generating pure oxygen and a CO2 gas as a cathode gas; a molten carbonate fuel cell which has an anode supplied with the anode gas generated by the anode gas generation means, which has a cathode supplied with the cathode gas, and which performs power generation by an electrochemical reaction between the anode gas and the cathode gas; and cooling function means provided on an inlet side of the anode to suppress an exothermic reaction in the molten carbonate fuel cell, and adapted to obtain an H2-rich gas from the CO gas-containing gas. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A power generating plant, comprising:
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a coal gasification furnace for burning coal to obtain a fuel gas; gas treatment means for converting the fuel gas obtained by the coal gasification furnace into a desired CO gas-containing gas; shift reaction means for subjecting the CO gas-containing gas obtained by the gas treatment means to a chemical reaction to form H2 and CO2; a molten carbonate fuel cell which has an anode supplied with an anode gas containing H2 obtained by the shift reaction means, which has a cathode supplied with a cathode gas containing pure oxygen and a CO2 gas, and which performs power generation by an electrochemical reaction between the anode gas and the cathode gas; a combustor for burning a cathode exhaust of the cathode and an anode exhaust of the anode; a turbine for expanding a combustion gas from the combustor to obtain power; waste heat recovery equipment which performs heat recovery of an exhaust from the turbine to generate steam, drives a steam turbine to obtain power, and cools the exhaust subjected to the heat recovery for separation into water and a CO2 gas; a CO2 compressor for compressing the CO2 gas separated by the waste heat recovery equipment and pressure-feeding the compressed CO2 gas to the cathode; and an oxygen supply system for supplying pure oxygen at a predetermined pressure to the CO2 gas compressed by the CO2 compressor, and wherein the gas treatment means comprises gas cooling means for cooling the fuel gas obtained by the coal gasification furnace with the water separated by the waste heat recovery equipment, desulfurization means for desulfurizing the fuel gas cooled by the gas cooling means to form the desired CO gas-containing gas, and a steam supply system for supplying steam, which has been obtained by cooling the gas by the gas cooling means, to the CO gas-containing gas desulfurized by the desulfurization means, and the power generating plant further comprising heating-up means for supplying the cathode exhaust to the cathode gas containing pure oxygen and a CO2 gas on an inlet side of the cathode to raise a temperature of the cathode gas. - View Dependent Claims (22)
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Specification