초록 ▼

An ultra-low NOx gas turbine combustor having a dual fuel capability. The combustor has a plurality of venturis in flow communication with a corresponding number of fuel lances such that fuel injected from each lance into a corresponding venturi is mixed with high velocity air also flowing into the

An ultra-low NOx gas turbine combustor having a dual fuel capability. The combustor has a plurality of venturis in flow communication with a corresponding number of fuel lances such that fuel injected from each lance into a corresponding venturi is mixed with high velocity air also flowing into the venturis. A vee-gutter flame holder is positioned downstream of the array of venturis for holding a combustion flame within the combustor at stable conditions. Due to the high velocities of the air-fuel mixture in the vicinity of the flame-holder, as a result of the fuel-air mixing in the venturis, destructive flash back conditions are obviated. A stable flame within the combustor provides for minimum acoustic disturbance and low overall pressure losses within the combustor provide for high operating efficiency levels of the turbine apparatus. Burning of the fuel in air at lean mixtures allows for minimal operation of a conventional pilot nozzle assembly so as to reduce the undesirable formation of NOx.

대표청구항 ▼

[ I claim:] [1.] A gas turbine, comprising:a) a compressor for compressing air;b) a combustor for producing a hot gas by burning a fuel in said compressed air, said combustor having:(I) a combustion zone,(ii) a centrally disposed first fuel nozzle,(iii) a plurality of second fuel nozzles circumferen

[ I claim:] [1.] A gas turbine, comprising:a) a compressor for compressing air;b) a combustor for producing a hot gas by burning a fuel in said compressed air, said combustor having:(I) a combustion zone,(ii) a centrally disposed first fuel nozzle,(iii) a plurality of second fuel nozzles circumferentially distributed around said first fuel nozzle,(iv) a plurality of venturis in flow communication with said compressed air and said combustion zone, said plurality of venturis corresponding in number to the number of said plurality of second fuel nozzles, each one of said second fuel nozzles being in flow communication with a corresponding one of said venturis for introducing a fuel into said venturis,(v) one or more flame holders disposed proximate said plurality of venturis; andc) a turbine for expanding said hot gas produced by said combustor.