| 摘要 |
A coal gasification combined cycle power generation plant generally includes a gas turbine system, a fuel supply system, an air supply system and an exhaust gas system, which are operatively connected to each other. The gas turbine system includes a combustor for selectively burning a coal gasification fuel obtained by gasifying a coal and a liquid fuel atomized by an atomization air and a gas turbine to which a combustion gas generated in the combustor is supplied. The fuel supply system is provided with a liquid fuel supply passage for the combustor through a fuel nozzle provided for the combustor, an atomization air supply passage for the combustor through the fuel nozzle and a coal gasification fuel supply passage for the combustor through the fuel nozzle, all of these supply passages being arranged so as to be adjacent to each other. The atomization air supply passage is provided with an outlet portion to which a branching outlet port for injecting the atomization air toward an outlet portion of the coal gasification supply passage is formed so as to secure a minimum flow rate for preventing the coal gasification fuel from conversely flowing into the fuel nozzle.
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