Patent ID: 6846175
Filing Date: 2005-01-25
Classification: F23C,F23D,F23L,F23M

Abstract:
1. A burner for the combustion of fuel in a furnace, said burner comprising: (a) a burner tube having a downstream end, and having an upstream end for receiving air and fuel; (b) a burner tip being mounted on the downstream end of said burner tube adjacent to a first opening in the furnace, so that combustion of the fuel takes place downstream of said burner tip; (c) at least one passageway having a first end at a second opening in the furnace and a second end adjacent the upstream end of said burner tube, said passageway having an orifice; (d) at least one bleed air duct having a first end and a second end, said first end in fluid communication with said orifice of said at least one passageway and said second end in fluid communication with a source of air which is cooler than the flue gas; and (e) means for drawing flue gas from said furnace through said at least one passageway and air from said at least one bleed air duct through said at least one passageway in response to an inspirating effect created by uncombusted fuel flowing through said burner tube from its upstream end towards its downstream end, whereby the flue gas is mixed with air from said at least one air bleed duct prior to the zone of combustion of the fuel to thereby lower the temperature of the drawn flue gas.