Method and apparatus for reducing NOX production during air-oxygen-fuel combustion

摘要

A method for reducing nitrogen oxide production during the combustion of an air-oxygen-fuel mixture comprising: creating an oxygen-fuel post or nozzle mix flame at an exit end (14) of a fuel supply conduit (12) surrounded by an exit end (20) of an oxygen supply conduit (18); surrounding said oxygen-fuel flame with air said air supplied around said flame as a plurality of streams surrounding said flame at an angle to a center line of said flame of greater than 0 DEG up to about 90 DEG ; and maintaining combustion with a total oxygen to fuel ratio of between about 1.5 and about 2.6.