METHOD OF OPERATION AND STEAM-GAS PLANT OF POWER STATION OPERATING ON COMBINATION FUEL (SOLID AND GASEOUS OR LIQUID FUEL) Russian patent published in 2004 - IPC

FIELD: steam-gas turbines; steam gas electric power stations.

SUBSTANCE: proposed method of operation of steam-gas electric power station operating on combination fuel includes combustion of solid fuel with formation of superheated vapor, mixing of combustion products with steam, expansion of gas-steam mixture with conversion of its potential energy into mechanical energy with simultaneous conversion of the latter into electric energy, recovery of exhaust gas heat, condensing of moisture and compression. Steam obtained owing to recovered heat of exhaust gases is connected with steam of steam circuit before mixing with combustion products. Steam-gas plant contains steam circuit and gas-steam circuit. Gas-steam circuit includes waste heat recovery boiler, heat exchanger for preliminary heating of condensate and condenser, condensate cooling unit and topping-up compressor connected by shaft with gas-turbine engine or steam turbine. Steam-gas plant is furnished with steam bleeding unit connected by its input simultaneously to steam extractions of waste heat recovery boiler and intermediate steam superheater of steam generator and by its output to combustion chamber of gas-steam turbine engine. Heat exchanger for preliminary superheating of condensate is connected by its water input through deaerator to condenser output and by its output, to feed pump of steam generator or intermediate heater.

EFFECT: improved efficiency of electric power station.

3 cl, 1 dwg