COMBINED-CYCLE PLANT WITH AIR CONDENSER Russian patent published in 2021 - IPC F01K23/10 

FIELD: gas turbines.

SUBSTANCE: combined cycle gas turbine with an air condenser includes: a compressor, a combustion chamber, a gas turbine, a heat exchanger for heating the working medium of the organic Rankine cycle due to the heat of gases leaving the gas turbine, a main exhaust pipe and a backup exhaust pipe for releasing gases from the gas turbine into the atmosphere bypassing the heat exchanger. Gas valves regulate the direction of gases to the heat exchanger and the back-up exhaust pipe. The condensate pump of the working medium of the organic Rankine cycle injects the liquid working medium from the condensate collector of the air condenser to the suction of the feed pump of the working medium and into the recirculation line of the liquid working medium. The working medium feed pump pumps the liquid working medium through the heat exchanger-recuperator into the heat exchanger and into the reflux condenser through the refrigerating machine. The turbine of the working fluid drives the equipment due to the expansion of the working fluid heated in the heat exchanger. In the bypass line, through which the steam of the working fluid is bypassed into the bypass of the turbine of the working fluid when regulating the rotational speed of the turbine rotor, a pressure regulator "upstream" is installed. In the heat exchanger-recuperator, the liquid working fluid, pumped by the feed pump, is heated by the steam of the working fluid from the exhaust of the turbine of the working fluid and the steam of the working fluid coming through the bypass line. An air condenser is an air-cooled heat exchanger with a tube bundle connected to the working medium steam collector on one side and to the condensate collector on the other, in which the working medium steam after the heat exchanger-recuperator is cooled and condensed, passing inside the tube bundle, washed from the outside. side by atmospheric air blown by a fan. The heat exchanger-cooler of non-condensable gases is a shell-and-tube heat exchanger, into the shell-and-tube space of which non-condensable gases enter from the condensate header of the air condenser, and a stream of non-condensable gases, cooled in a dephlegmator, moves in the tubes. The dephlegmator is a contact heat exchanger, in which non-condensable gases coming from the heat exchanger-cooler are cooled by contact with the working fluid stream sprayed through the nozzles pre-cooled in the refrigerating machine, taken from the feed pump discharge line, while the cooled non-condensable gases from the upper part of the dephlegmator enter the tube bundle of the heat exchanger-cooler and then into the candle for the discharge of non-condensable gases, and the liquid working fluid from the lower part of the dephlegmator through the hydraulic seal is drained into the condensate header of the air condenser. The heat exchanger-subcooler of the working fluid is an air-cooled heat exchanger with a tube bundle, inside the pipes of which the working fluid flow moves from the recirculation line from the discharge side of the condensate pump to the supply line of the working fluid to the suction of the condensate pump, while the outer side of the specified tube bundle is washed by atmospheric air blown by a fan.

EFFECT: reduced size and cost of heat exchange equipment, increased efficiency, as well as increased reliability.

3 cl, 1 dwg