Patent ID: 7805923

Claim:
A flue-gas-desulfurization-type integrated coal gasification combined cycle plant comprising: a gasifier configured to convert pulverized coal to a gas fuel; a heat recovery steam generator configured to generate steam; a gas turbine which is operated by the gas fuel and which supplies a combustion exhaust gas to the heat recovery steam generator; a steam turbine which is operated by the steam generated by the heat recovery steam generator; a power generator connected to at least one of the gas turbine and the steam turbine; a desulfurization equipment configured to desulfurize the combustion exhaust gas discharged from the heat recovery steam generator, the desulfurized combustion exhaust gas being exhausted into the atmosphere; a flare system; a flow path which is provided for an early produced gas and which is branched from an outlet side of the gasifier and is extended to the flare system; and an exclusive desulfurization equipment which is provided for the flow path and which is exclusively used for the early produced gas.