Patent ID: 7833009

Claim:
A method of combustion in a glass furnace comprising a melter, side A and side B, and regenerators on side A and side B of the furnace; said method comprising the steps of: locating a firing zone on one of side A and side B and an exhaust zone on the other of side A and side B of the furnace; introducing fuel into the firing zone; introducing a first oxidant into the firing zone; introducing a second oxidant into the firing zone, said first oxidant is air and said second oxidant comprises enriched air, combusting said fuel and said first and second oxidants in said firing zone to transfer heat to the melter; flowing exhaust gases toward the exhaust zone for a time; introducing a third oxidant into the exhaust zone to complete combustion of unburned fuel within the melter; wherein during said step of introducing a first oxidant, the step of introducing a second oxidant, and the step of introducing a third oxidant occur; switching the sides of the furnace that are the firing zone and the exhaust zone; and repeating said method.