Patent ID: 8025501
Filing Date: 2011-09-27
Classification: F23C,F23D,Y02E

Abstract:
1. A combustion furnace comprising: a hollow interior which, during a normal operation of the furnace, is at a desired operating temperature; a floor at the bottom of the hollow interior; a source of pressured fuel gas; a source of combustion air; a gas burner adjacent the floor for combusting the fuel gas and combustion air, the gas burner including a combustion zone, located completely downstream of the gas burner and in the hollow interior, the combustion zone providing, during the normal operation and downstream of the gas burner, an initial mixing of the mixture of furnace gas and fuel gas exiting from the first outlet of the first passageway with only combustion air exiting from the second outlet of the second passageway so that a flame is produced by the combustion thereof only at a location downstream of the gas burner.