METHOD AND DEVICE FOR STARTING AND SUPPLYING GAS TO GAS-TURBINE POWER PLANT Russian patent published in 2002 - IPC

FIELD: gas-turbine power plants primarily used to introduce combined cycle technology in thermal power stations. SUBSTANCE: method involves acceleration of fixed rotors of turbocompressor and fuel-gas booster compressor by external starting engine. Fuel gas is supplied through booster compressor to combustion chamber of gas-turbine plant and then ignited. After that fixed rotors of turbocompressor and booster compressor are disconnected from starting engine as soon as they have gained speed and brought to full- speed running by increasing flowrate and pressure of fuel gas. Upon accelerating the rotors fuel gas leaving the booster compressor is passed through control valve to steam-jet compressor and then to combustion chamber of gas-turbine plant. Steam shutoff and control valves are also opened and high- pressure steam is supplied from external source to steam-jet compressor wherein it is additionally compressed. Steam-gas mixture obtained is conveyed to combustion chamber with gas flowrate and pressure being controlled automatically. EFFECT: reduced nitrogen oxide concentration in combustion products; enhanced power capacity of plant. 2 cl, 1 dwg