METHOD OF AND DEVICE TO CONTROL FUEL DELIVERY INTO COMBUSTION CHAMBER OF GAS-TURBINE PLANT Russian patent published in 2005 - IPC

FIELD: gas-turbine plants.

SUBSTANCE: proposed method includes changing of fuel rate depending on power by metering out delivery of fuel into manifolds of coaxially installed pilot and main burners of burner assemblies with preliminary mixing of fuel and air. Burner assemblies are installed in two tiers, and fuel is delivered into burners of both tiers. At starting fuel is fed into manifold of pilot burners of outer tier and before idling, into manifold of pilot, burners of inner tier. At idling amount of fuel fed into pilot burners of outer and inner tiers is maintained equal. Then fuel delivery into pilot burners of outer and inner tiers is increased. Prior to operation under no-load conditions fuel is fed to main burners of outer and inner tiers. In the range from no-load to rated load, fuel delivery into main burners is increased with simultaneously decreasing relative portion of fuel fed through pilot burners. Invention provides reduction of content of nitrogen oxides NO_xin exhaust gases of gas-turbine plant.

EFFECT: provision of stable burning of lean mixtures under any operating conditions.

4 cl, 2 dwg