COMBINED CYCLE POWER PLANT AND ITS OPERATING PROCESS Russian patent published in 2005 - IPC

FIELD: power engineering.

SUBSTANCE: proposed combined cycle plant has boiler 14 for steam production that incorporates furnace for fuel combustion to produce furnace gas and process-gas inlet pipeline 78 passing process gas to furnace; steam turbine 38 that receives steam and is set in motion by means of this steam for energy generation; combustion chamber 52 for burning secondary fuel to produce gaseous combustion products; gas turbine 46 for expanding gaseous combustion products coming from combustion chamber to generate energy and to pass waste gas to process-gas inlet pipeline 78; return pipeline 86 for recirculation of part of furnace gas; first governor of furnace gas circulation speed in return pipeline 86; feeder 80 for fresh air supply to process gas inlet pipeline; second speed governor for fresh air supplied to feeder 80; and control device for first and second governors designed to maintain at least almost optimal performance characteristics of boiler under various operating conditions of combustion chamber.

EFFECT: enhanced energy generation efficiency under various operating conditions of combustion chamber.

24 cl, 1 dwg