FINAL-STAGE SET OF GAS-TURBINE POWER-GENERATING STATION Russian patent published in 2006 - IPC F02C6/18 

FIELD: heat power engineering.

SUBSTANCE: invention can be used in gas-turbine power-generating stations-gas-turbine thermoelectric plants and steam-gas plants operating on gaseous fuel. Proposed final-stage set of gas-turbine power-generating station contains steam waste-heat recovery boiler communicating through heat carrier end with exhaust gas output of gas-turbine engine of station, gas meter-turbocompressor, drive steam turbine with condenser and condenser pump, system of gas, steam and water pipelines with regulating and shutoff valves. Rotor of drive steam turbine is installed on one shaft with rotor of gas meter-turbocompressor and the latter communicates at gas end input with supply main line of gaseous fuel, and at gas end output, with gas-turbine engine. Drive steam turbine communicates at steam end input with steam end output of recovery boiler and at steam end output with steam end input of condenser. Condenser at condensate end output communicates through condenser pump with recovery boiler condenser end input. According to invention, gas meter-turbocompressor and drive steam turbine are made in form of common sealed structure in which shaft with rotors of gas meter-turbocompressor and drive steam turbine is provided with seal separating gas duct of gas meter-turbocompressor from steam duct of drive steam turbine. Gas meter-turbocompressor and drive steam turbine are made and installed on shaft so that steam pressure before seal from side of drive steam turbine exceeds gas pressure before seal from side of gas meter-turbocompressor at all operating duties of gas-turbine engine of station.

EFFECT: prevention of gas flows into steam ducts and getting of gas and steam into room with final-stage set.

1 dwg