Patent ID: 6890172
Filing Date: 2005-05-10
Classification: F23C,F23D,F23L,F23M

Abstract:
1. A burner for the combustion of fuel for use in a furnace, comprising: (a) a primary air chamber; (b) a burner tube including (i) a downstream end, (ii) an upstream end for receiving air, flue gas and mixtures thereof and fuel, and (iii) a burner tip mounted on the downstream end of said burner tube and directed to a first opening in the furnace, so that combustion takes place downstream of said burner tip; (c) at least one flue gas recirculation duct having a first end at a second opening in the furnace and a second end opening into said primary air chamber; said at least one flue gas recirculation duct having at least one primary air channel in fluid communication with said at least one flue gas recirculation duct; and (d) means for drawing flue gas from said furnace and primary air from a source of air, through said duct and into said primary air chamber in response to an inspirating effect of uncombusted fuel flowing through said burner tube from its upstream end towards its downstream end.