| 摘要 |
PROBLEM TO BE SOLVED: To improve efficiency without increasing a facility cost by heating water fed toward a gas cooling facility for cooling gasified fuel to a suitable temperature, in a gasification compound power plant in which gasified fuel is used as fuel of a power generating system. SOLUTION: A feed water heater for heating water fed toward a gas cooling facility 5 is arranged so as to heat feed water to the temperature of the saturation temperature or less, preferably, from the saturation temperature to the range of -50 deg.C to -0 deg.C of an evaporator generating steam of lowest pressure in waste heat recovery boiler 11 using, as a heat source, exhaust gas from a gas turbine 10 for power generation using, as fuel, gas fuel of gasified solid or liquid fuel. Water fed toward a gas cooling facility 5 is heated efficiently so as to improve efficiency of gasification compound power generation plant and reduce an installation cost.
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