Patent ID: 6416317
Filing Date: 2002-07-09
Classification: F23D,Y02E

Abstract:
A system comprising:a quarl including a passage having opposite first and second openings, the passage having a first inner diameter adjacent to the first opening, the passage having a second inner diameter adjacent to the second opening, the first inner diameter being less than the second inner diameter, and the passage having a transition zone between the first and second openings having an inner diameter between the first inner diameter and the second inner diameter; and a burner mounted in said first opening, said burner extending into said passage and not extending out of said second opening, the burner comprising: at least one fuel supply pipe having an outlet, the at least one fuel supply pipe extending along a fuel supply axis; at least one pipe having an outlet for supplying an oxygen-rich gas, the outlets of the at least one fuel supply pipe and the at least one oxygen-rich gas pipe being directed in the same outlet direction and to a flame retention zone where fuel gas from said at least one fuel supply pipe and oxygen-rich gas from said at least one oxygen-rich gas pipe meet, the burner being configured to be mounted through a wall of a furnace with the pipes directed into the furnace; a plurality of auxiliary members for acting on the flame, the auxiliary members being positioned in the burner upstream of the flame retention zone and offset from said fuel supply axis and being directed at said flame retention zone; wherein said outlet of said at least one fuel pipe is positioned in said quarl passage transition zone.