COMBINED GAS AND STEAM UNIT OF A POWER PLANT WITH PARALLEL OPERATION Russian patent published in 2021 - IPC F01K23/10 

FIELD: power engineering.

SUBSTANCE: invention relates to power engineering and can be used in thermal power plants. Proposed is a combined gas and steam unit of a power plant with parallel operation, containing a gas turbine unit consisting of a turbine compressor, combustion chamber, gas turbine, power generator and exhaust gas duct for discharge of gases from the gas turbine unit, a waste heat boiler, a feed electric pump, a power boiler, main steam line, a steam turbine unit consisting of a steam turbine with a condenser, a condensate pump, a deaerator and a feed pump, an electric generator, the power boiler is pressure-fired, wherein the combined gas and steam unit of a power plant with parallel operation is additionally equipped with a mixing chamber installed in the exhaust gas duct for discharge of gases from the gas turbine unit at a temperature of 450 to 550°C into the waste heat boiler, and a bypass gas duct connecting the gas path of the pressure-fired power boiler with the mixing chamber, wherein, in order to generate superheated water vapour with supercritical parameters with a temperature of 560 to 600°C in the waste heat boiler, the flow rate of the combustion products supplied from the gas path of the power boiler at a temperature of 700 to 750°C to the mixing chamber is changed by a regulating body installed in the bypass gas duct before the mixing chamber.

EFFECT: increase in the cost efficiency of a combined gas and steam unit of a power plant with parallel operation.

1 cl, 1 dwg