GAS-STEAM POWER PLANT Russian patent published in 2023 - IPC F02C3/30 

FIELD: power engineering.

SUBSTANCE: gas-steam power plant consists of low- and high-pressure compressors, a combustion chamber, high- and low-pressure gas-steam turbines, an electric generator, an air cooler, a steam waste heat boiler, the first and the second back-pressure steam turbines; a waste heat boiler installed behind the high-pressure gas-steam turbine, a heat exchanger with steam contact condensation and condensate separation devices, installed behind the low-pressure gas-steam turbine, an evaporative cooling tower, chemical water purification, a deaerator. A rotor of the low-pressure compressor is connected with a shaft to a rotor of the second back-pressure steam turbine, rotors of the high-pressure compressor, high- and low-pressure gas-steam turbines, and the first back-pressure turbine are connected with a common shaft to a rotor of the electric generator; a superheater of the waste heat boiler is connected with a high-pressure steam pipeline to the first condensing turbine and via a control valve to the second back-pressure turbine, outputs of which are connected with a medium-pressure steam pipeline to the combustion chamber, a rotor of the gas-steam turbine is connected with a shaft to the rotor of the electric generator. At the same time, the plant additionally includes a low-pressure gas-steam turbine, two back-pressure steam turbines, a heat exchanger with steam contact condensation and condensate separation devices, installed behind the low-pressure gas-steam turbine, a condensate collection tank, an evaporative cooling tower, chemical water purification, a deaerator, a common superheated steam pipeline, a superheated steam pipeline with a control valve, a medium-pressure steam pipeline, a heat exchanger with steam contact condensation and condensate separation devices, the latter is connected with most of the condensate via the condensate collection tank to the evaporative cooling tower, and with smaller part – to chemical water purification. An output of the evaporative cooling tower is connected via cooled water to the contact steam condensation device and to a heat exchange surface of the air cooler; the rotor of the first counter-pressure turbine is connected with a common shaft to rotors of high- and low-pressure gas-steam turbines, the high-pressure compressor, the electric generator; the rotor of the second counter-pressure turbine is connected with a shaft to the rotor of the low-pressure compressor. An output of the superheater of the waste heat boiler is connected with a common superheated steam pipeline to an input of the first back-pressure steam turbine, as well as with the superheated steam pipeline with the control valve is connected to an input of the second back-pressure turbine. Outputs of back-pressure turbines are connected with the medium-pressure steam pipeline to the combustion chamber.

EFFECT: obtainment of a gas-steam power plant.

1 cl, 1 dwg