NOx REDUCTION METHOD

摘要

A method of reducing NOx emissions of gas turbines (1) in which supplementary compressed air streams (26) are introduced into compressors of the gas turbine (1). The supplementary compressed air streams (26) have a pressure higher than that of compressor air (18) being used to support combustion within the combustor (14) to enhance mixing of the compressed air streams (26) with gaseous fuel (31) and the compressor air (18). The compressor air (18) and the supplementary compressed air streams (26) are introduced into the combustors (14) at a rate greater than that required to support combustion of the gaseous fuel (31) to thereby lower flame temperature of the combustion and therefore the NOx emissions that would be otherwise produced by the combustion. A hydrogen containing stream (28) can be introduced into the combustors along with the fuel (30) to enhance flame stability of the combustion.