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An improved burner for combustion of fuel gas with air in a manner to result in low NOx, the burner is generally circular and has a refractory tile and gas tips. The gas tips are spaced around the outer circumference of a generally circular passageway in the burner tile, each gas tip is positioned t

An improved burner for combustion of fuel gas with air in a manner to result in low NOx, the burner is generally circular and has a refractory tile and gas tips. The gas tips are spaced around the outer circumference of a generally circular passageway in the burner tile, each gas tip is positioned to cause the fuel gas to entrain furnace flue gas. Each gas tip has one or more ports, an ignition port and at least one firing port. The ignition port injects fuel through a passageway to the burner tile. The firing port injects fuel gas in the direction that is generally upward with respect to the pathway of the ignition port. This causes fuel gas to entrain combustion products from the flue gas, the resulting mixture of fuel gas and flue gas is directed out of the burner tile to mix with combustion air that is discharged through the burner tile.

대표청구항 ▼

1. A low NOX burner for combusting fuel gas and air in an enclosure comprising: a burner block having an inlet end and an outlet end and a central opening therethrough between the ends, said block having a plurality of spaced apart passageways extending between said inlet and outlet ends, said passa

1. A low NOX burner for combusting fuel gas and air in an enclosure comprising: a burner block having an inlet end and an outlet end and a central opening therethrough between the ends, said block having a plurality of spaced apart passageways extending between said inlet and outlet ends, said passageways being at least generally parallel to and spaced from said central opening, said central opening in said block being defined by a first substantially cylindrical portion having a first end and a second end and a second portion having a third end and a fourth end, said first end of said first substantially cylindrical portion communicating with said block inlet end and said second end communicating with said third end of said second portion forming a ledge, said fourth end of said second portion communicating with said block outlet end; and a fuel ejection tip having an ignition port and at least one firing port, positioned within each passageway for injecting a first portion of fuel gas into said central opening and a second portion of said fuel gas above said central opening in a substantially vertical direction.