Patent ID: 6672858
Filing Date: 2004-01-06
Classification: F23C,F23D

Abstract:
A method of heating a furnace comprising, in combination, the steps of,a. providing at least one burner having a primary combustion zone in communication with a plurality of recirculation ports defining a predetermined total cross sectional area measured at the interface of the primary combustion zone and the recirculation port; b. introducing fuel gas to the burner through a plurality of fuel tips to generate heat at a total rate of less than or equal to 200,000 BTU/hr/in2 of total cross-sectional area of the recirculation ports; c. combusting a portion of the fuel gas in the primary combustion zone to produce heat and furnace gases; d. recirculating a portion of the furnace gases to the burner and dispersing the fuel gas within the recirculated furnace gases in the recirculation ports prior to combustion; and e. removing a portion of the furnace gases from the furnace.