Patent ID: 7810310

Claim:
An integrated coal gasification combined cycle system plant having: a coal gasifier configured to convert pulverized coal to a syngas; a gas turbine system which is operated by the syngas; a steam turbine system operated by steam generated by an exhaust heat recovery boiler to which a combustion exhaust gas of the gas turbine system is supplied, a power generator connected to at least one of the gas turbine system and the steam turbine system; and a recovery equipment which is located between the coal gasifier and the gas turbine system, and which is configured to be operated at the temperature less than 400° C. to recover at least char contained in the syngas and to supply the char recovered to the coal gasifier, the integrated coal gasification combined cycle system plant being of flue-gas-desulfurization-type, by which the combustion exhaust gas discharged from the exhaust heat recovery boiler is desulfurized before emitted into the atmosphere, wherein the integrated coal gasification combined cycle system plant comprises a desulfurization device configured to desulfurize the combustion exhaust gas discharged from the exhaust heat recovery boiler to recover a sulfur component; and a wet-type electric precipitator configured to recover a sulfur component and dust from the combustion exhaust gas discharged from the desulfurization device.