| 摘要 |
<p>The control system and method of start-up are for a gas turbine power plant having an air-cooled pressurized fluidized bed combustor for generating combustion gases from the burning of pulverized fuel in the presence of crushed dolomite. The plant also has a gas turbine engine connected to be driven by the combustion gases and for driving an air compressor which provides compressed air for cooling, fluidizing the bed and supporting combustion of the fuel in the fluidized bed combustor. In addition, the plant is provided with a free power turbine which is connected to drive an alternator and to be driven by gases exhausted from the gas turbine engine. The control system has, for start-up operation, various valve-controlled by-pass conduits for preheating compressed air before entry into the fluidized bed combustor, diverting compressed air for cooling from the fluidized bed combustor and diverting exhaust gases around the free power turbine. The valve-controlled by-pass for diverting exhaust gas around the free power turbine also functions to quickly adjust the output of the free power turbine to reductions in load thereon and, upon sudden loss of load, prevents destructive overspeeding of the free power turbine without disruption of the function and thermo-dynamic balance of the fluidized bed combustor and gas turbine engine.</p> |
