COGENERATION COMBINED CYCLE PLANT Russian patent published in 2021 - IPC F01K23/10 

FIELD: cogeneration combined cycle plants.

SUBSTANCE: cogeneration combined cycle plant, which is characterized by the fact that it includes: a compressor for compressing atmospheric air; a combustion chamber in which the fuel is burned in compressed air from the compressor; a gas turbine, in which the hot gases coming from the combustion chamber expand to generate mechanical power, which is spent on compressing air in the compressor and driving equipment that consumes mechanical power; a utilizer for heating the working fluid of the organic Rankine cycle due to the heat of the gases leaving the gas turbine; the main exhaust pipe through which the gases cooled in the heat recovery unit are released into the atmosphere; a reserve exhaust pipe for exhausting gases from the gas turbine into the atmosphere into the bypass of the heat exchanger; gas valves regulating the direction of gases into the heat exchanger and the back-up exhaust pipe; condensate pump of the working medium of the organic Rankine cycle, pumping the liquid working medium from the condensate collector of the condenser to the suction of the feed pump; a feed pump for the working medium of the organic Rankine cycle, pumping the liquid working medium through a series-installed heat exchanger-cooler and a heat exchanger-recuperator into a utilizer; a working fluid turbine that drives equipment that consumes mechanical power due to the mechanical power generated during the expansion of the working fluid heated in the heat exchanger, which has an intermediate extraction of the working fluid steam from the flow path, which is fed to the heat-consuming device and to the air heater at the compressor inlet; a bypass line with an upstream pressure regulator installed on it, through which steam of the working fluid is bypassed into the bypass of the working fluid turbine when regulating the turbine rotor speed; a heat exchanger-recuperator, in which the liquid working fluid, pumped by the feed pump, is heated by the steam of the working fluid from the exhaust of the working fluid turbine, the steam of the working fluid coming through the bypass line, as well as steam from the heat-consuming device and steam from the air heater; a condenser, which is a heat exchanger, in which the vapor of the working fluid after the heat exchanger-recuperator is cooled and condensed when cooled by the heat carrier supplied from the external environment; a line for removing non-condensed steam from a heat-consuming device and an air heater with an upstream pressure regulator installed on it, connected from the side of the steam outlet to the steam line in front of the heat exchanger-recuperator; a line for draining the condensate of the working fluid from the heat-consuming device and the air heater with an upstream pressure regulator installed on it, connected to the inlet of the heat exchanger-cooler; heat exchanger-cooler, through which the liquid working fluid from the condensate drain line of the working fluid from the heat-consuming device and the air heater is supplied to the suction of the feed pump.

EFFECT: reduced size and cost of equipment, increased efficiency of fuel use in the production of thermal and mechanical energy, as well as increased reliability.

1 cl, 1 dwg