Patent ID: 6968791

Claim:
A method for operating a cyclone combustor having a first burner and a second burner, each of the first burner and the second burner being in communication with a barrel having a longitudinal axis, a burner end adjacent at least one of the first burner and the second burner, and a throat end opposite the burner end, comprising the steps of: feeding a stream of a primary fuel and a primary oxidant having a first oxygen concentration of about 21 vol. % into the first burner; feeding a stream of a secondary fuel and a secondary oxidant having a second oxygen concentration greater than about 21 vol. % into the second burner; combusting at least a portion of the primary fuel with at least a portion of the primary oxidant in the barrel of the cyclone combustor, thereby forming a plurality of primary products of combustion in the barrel of the cyclone combustor; and combusting at least a portion of the secondary fuel with at least a portion of the secondary oxidant, thereby forming a plurality of secondary products of combustion and a secondary flame, the secondary flame generating a supplemental radiant heat in the barrel of the cyclone combustor.