초록 ▼

Method and apparatus for reducing NOx production during air-oxygen-fuel combustion by providing a central core of fuel surrounded by a sheath of oxygen at a combustion end of an air-oxygen-fuel burner. Diametrically opposed air passages are provided on either side of the oxygen sheath to permit entr

Method and apparatus for reducing NOx production during air-oxygen-fuel combustion by providing a central core of fuel surrounded by a sheath of oxygen at a combustion end of an air-oxygen-fuel burner. Diametrically opposed air passages are provided on either side of the oxygen sheath to permit entrainment of furnace gases into a flame zone created by primary combustion of fuel and oxygen. Oxygen can be introduced into each air passage to enhance combustion with low NOx emissions.

대표청구항 ▼

[ What is claimed:] [7.] A method for reducing nitrogen oxide production during the combustion of an air-oxygen-fuel mixture comprising the steps of:creating an oxygen-fuel flame at an exit end of a fuel supply conduit and an oxygen conduit spaced outwardly from and around said fuel supply conduit;s

[ What is claimed:] [7.] A method for reducing nitrogen oxide production during the combustion of an air-oxygen-fuel mixture comprising the steps of:creating an oxygen-fuel flame at an exit end of a fuel supply conduit and an oxygen conduit spaced outwardly from and around said fuel supply conduit;surrounding said oxygen-fuel flame with air, said air supplied on either side of said oxygen-fuel flame through generally crescent shaped passages spaced outwardly from an exit end of said fuel supply conduit;introducing substantially pure oxygen into each of said crescent shaped passages; andmaintaining combustion with a total oxidizer (air+pure oxygen) content of less than 60% by volume.