Patent ID: 6524097
Filing Date: 2003-02-25
Classification: C03B,F23D,Y02E,Y02P

Abstract:
A process for maintaining heating of a furnace to an elevated temperature using oxy-fuel combustion, wherein an oxy-fuel flame is introduced into said furnace using an oxy-fuel burner having an oxy-fuel firing rate, and a separate oxidizer stream is introduced underneath said oxy-fuel flame using means disposed beneath said oxy-fuel flame, when oxygen supply for said flame and said oxidizer is eliminated or terminated, comprising the steps of:introducing one of air or oxygen enriched air into said furnace in place of said oxy-fuel flame; and replacing said separate oxidizer stream with fuel and introducing said fuel into said furnace beneath said one of air or oxygen enriched air to provide an air-fuel flame having a firing rate equal to or greater than said oxy-fuel firing rate to maintain said temperature in said furnace.