METHOD OF START AND GAS SUPPLY TO ELECTRICAL GREEN GAS TURBINE PLANT AND DEVICE FOR ITS REALISATION Russian patent published in 2016 - IPC F02C7/26 

FIELD: power engineering.

SUBSTANCE: gas turbine engine (GTE) gas generator rotor is turned to supply air into a combustion chamber. After the GTE rotor reaches the start rpm, the fuel gas valve is opened to the gas turbine plant, and fuel gas is supplied to a booster gas compressor. In the booster gas compressor they open controlled guide vanes to ensure higher pressure of fuel gas at the inlet into the combustion chamber compared to the air pressure in the combustion chamber, and fuel gas is supplied into a passive nozzle of an ejector-mixer, from which the fuel gas is supplied for combustion into the combustion chamber. The GTE exhaust gas is supplied along the pneumatic line into a steam exhaust heat boiler, where steam is generated after water supply. The shutoff steam valve is opened to supply steam into the steam turbine, equipped with a controlled nozzle block, to rotate the steam turbine rotor and the connected rotor of the booster gas compressor, at the same time the steam from the steam turbine is supplied into the flow path of the GTE in the form of the turbine fluid or the cooling agent of the GTE cooling system. During operation of the booster gas compressor and at high modes of GTE with the help of a controlled dosing needle they supply steam from the steam turbine into the ejector-mixer, where after passage of the active nozzle the steam is mixed with the fuel gas supplied into the passive nozzle, and via the pneumatic outlet of the ejector-mixer in the form of an even steam and gas mixture it is supplied into the zone of the combustion chamber.

EFFECT: reduced concentration of nitrogen oxides in combustion products, increased capacity of a gas turbine power plant, its higher reliability, cost-effectiveness and safety.

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