Method for reducing emissons from a combustor

摘要

Provided is a modification method for reducing emissions from an annular shaped combustor of a gas turbine plant having uniformly spaced circumferentially mounted premix burners (20). The method includes the steps of: removing at least one the burner (20) thereby disrupting the spatial uniformity of the remaining burners (20); and modifying the combustor air distribution system so as to compensate for the increased burner pressure drop of remaining burners so by enabling the modified combustor to operate at a load equivalent to the unmodified combustor. Emission reduction is enabled by the increase in the gas velocity of the burner for a given load further enabled by the flame stabilizing effect of disrupting the spatial uniformity.