BURNER ASSEMBLY HAVING A TERTIARY AIR NOZZLE

摘要

A burner assembly for mounting adjacent an opening in the wall of a furnace, including at least one fuel burner member disposed in a sleeve having an end portion terminating adjacent the opening. A first supply of combustion air for the fuel is directed from a location external of the sleeve toward the opening and a second supply of combustion air is introduced into the sleeve. A cup shaped insert is disposed in the sleeve for defining a nozzle having an annular discharge opening for discharging the second supply of air towards the stream of fuel discharging from the burner member.