2ND GENERATION PFB PLANT WITH SUPER CRITICAL PRESSURE STEAM TURBINE

Research has been conducted under United States Department of Energy (USDOE) Contract DE-AC21-86MC21023 to develop a new type of coal-fired, combined cycle, gas turbine-steam turbine plant for electric power generation. This new type of plant - called a 2nd Generation or Advanced Pressurized Fluidized Bed Combustion (APFB) plant - offers the promise of efficiencies greater than 48 percent (HHV) with both emissions and a cost of electricity that are 10 to 20 percent lower than those of conventional pulverized-coal-fired plants with scrubbers. In the 2nd Generation PFB plant coal is partially gasified in a pressurized fluidized bed reactor to produce a coal derived syngas and a char residue. The syngas fuels the gas turbine and the char fuels a pressurized circulating fluidized bed (PCFB) boiler that powers the steam turbine and supplies hot vitiated air for the combustion of the syngas.