OPERATING METHOD OF GAS-TURBINE ELECTRIC GENERATOR Russian patent published in 2012 - IPC F02C3/34 F01K23/10 

FIELD: power industry.

SUBSTANCE: fuel and the received mixture of ambient air with cooled recirculating gaseous combustion products are compressed. Chamber combustion of fuel is performed under pressure in the environment of the received compression mixture of atmospheric air with cooled recirculating combustion products with formation of high-temperature gaseous combustion products. The formed high-temperature combustion products are subject to gas-turbine decompression so that decompression non-cooled gaseous combustion products can be obtained and separated into two flows. One flow is supplied to the boiler gas duct. The other - to gas line of recirculating gaseous combustion products for cooling and mixing with ambient air prior to compression. Ambient air is cooled prior to compression. Cooling of recirculating gaseous combustion products and ambient air is performed with cooling agent generated in turbine expander and circulating via closed circuit with cooling agent.

EFFECT: reducing auxiliary costs and increasing the efficiency; maintaining low concentration level of nitrogen oxides in flue gases taken from the boiler to atmosphere.

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