PURPOSE: To simplify a main steam system and a reheat steam system respectively and enhance heat efficiency of a plant by providing a boiler mainly composed of a superheater and a boiler mainly composed of a reheater in a power generating device comprising a pressurized fluidized bed boiler, a gas turbine, and a reheating type steam turbine.
CONSTITUTION: Water is supplied to an evaporator 2aE of a boiler 2a mainly composed of a superheater from a condenser 6 through a water supply system 20a, and water is also supplied to an evaporator 2bE of a boiler 2b mainly composed of a reheater via another water supply system 20b. Confluent steam 22 of steam generated in the evaporators 2aE, 2bE is turned into main steam 26 in a superheater 2aS of the boiler 2a mainly composed of the superheater. The main steam 26 is supplied to a high pressure steam turbine 4H, and low temperature reheat steam 30 after work is fed to a reheater 2bR of the boiler 2b mainly composed of the reheater. Subsequently, high temperature reheat steam 34 is supplied from the reheater 2bR to an intermediate pressure steam turbine 4I, where work is completed, to be returned to a condenser 6 through a low pressure steam turbine 4L.
ABE RIKIYA
HORI KIKUO
GIJUTSU SOKEN KK