BURNER SYSTEM WITH IMPROVED FLUE GAS RECIRCULATION

摘要

A burner for the combustion of fuel in a furnace includes a primary air chamber; a burner tube having an upstream end, a downstream end and a venturi intermediate the upstream and downstream ends. A fuel spud is located adjacent the upstream end of the burner tube for introducing fuel into the burner tube and a burner tip is mounted on the downstream end of the burner tube adjacent a first opening in the furnace. Means is provided for drawing flue gas from the furnace, through the at least one passageway, in response to the inspirating effect of uncombusted fuel exiting the fuel spud, the uncombusted fuel flowing through the burner tube from its upstream end towards its downstream end. In addition, the fuel spud includes means for increasing the inspirating effect of uncombusted fuel exiting the fuel spud.