The large capacity pressurized fluidized bed combustion boiler combined cycle power plant

摘要

Improving the thermal efficiency and environmental characteristics of coal-fired power generation systems, The Chugoku Electric Power Co. and Hitachi Group have developed the first commercial 250-MW PFBC (Pressurized Fluidized Bed Combustion) combined cycle power plant in Osaki. The Osaki PFBC plant was successfully commissioned and its commercial operation commenced on Nov.30, 2000. We introduce main features of the equipment and several trial operation data of the Osaki PFBC plant. The plant is composed of a combined cycle arrangement with a gas turbine and a steam turbine, producing an output of approximately 15% and 85% of the total electricity. It also contains a pressurized fluidized bed combusion boiler which generates steam to drive the steam turbine, where the gas from the boiler is directed to a two-stage multi-cyclone, which drives a gas turbine. The boiler consists of two vessels containing two furnaces, and the gas turbine is a similar type to the one installed at The Chugoku Electric's Yanai Power Station.