METHOD AND DEVICE FOR REDUCING EMISSION OF NITROGEN OXIDES FROM GAS-TURBINE PLANT Russian patent published in 1999 - IPC

FIELD: environmental control. SUBSTANCE: method involves air compression and heating in combustion chamber, as well as its expansion in turbine. It also includes regenerative heating of compressed air with exhaust gases prior to feeding it to combustion chamber. Upon compression, air flow is bifurcated. First flow at a rate of 5 to 50% is passes directly to burning zone of combustion chamber. Second flow goes upon maximal regenerative heating to mixing zone of combustion chamber. Gas-turbine plant has compressor, combustion chamber, turbine, and gas-air regenerator all installed in tandem in gas path. Regenerator communicates through air ducts on heated air inlet with compressor outlet and on heated air outlet, with combustion chamber. Air path is divided at compressor outlet into two ducts by means of air ducts. First of them communicates with combustion chamber burning zone inlet. Second one communicates through regenerator with mixing zone of combustion chamber. EFFECT: reduced emission of nitrogen oxides from gas-turbine plant. 13 cl, 7 dwg