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US 4,907,961 AGranted
Oxygen jet burner and combustion method
AssigneeUnion Carbide Corporation
InventorJohn E. Anderson
Life of this patent
Estimating the term…
Abstract
A burner and combustion method employing oxygen or oxygen-enriched air as the oxidant comprising a low velocity oxidant stream in proximity to high velocity main oxidant within a combustion zone enabling efficient combustion with a stable flame at very high oxidant velocities.
Claims22
A method for combusting fuel and oxidant comprising:
- (A) injecting into a combustion zone the major portion of the oxidant required for the combustion, said major oxidant comprising at least 30 volume percent oxygen, as at least one stream at a high velocity V which is greater than 5P where P is the volume percent oxygen in the major oxidant and V is in feet per second;
- (B) injecting into said combustion zone in proximity to the major oxidant, a minor portion of the oxidant required for the combustion, said minor portion comprising at least 1 percent of the total oxygen injected into the combustion zone, said minor oxidant comprising at least 30 volume percent oxygen, at a low velocity less than 0.5 V;
- (C) injecting gaseous fuel into the combustion zone in proximity to the minor oxidant to form an interface between said gaseous fuel and said minor oxidant, at a velocity such that the low velocity of the minor oxidant is within 200 feet per second of the velocity of the gaseous fuel at the interface;
- (D) combusting minor oxidant with gaseous fuel at the interface;
- (E) entraining minor oxidant into the high velocity major oxidant immediately after injection of the major oxidant into the combustion zone and thereafter entraining gaseous fuel into the high velocity major oxidant;
- and
- (F) drawing hot combustion products from the interface into the high velocity major oxidant, said hot combustion products serving as a continuous source of ignition for the fuel and major oxidant, and combusting gaseous fuel and high velocity major oxidant in a stable flame.
4 more elements
Burner apparatus for use with pure oxygen or oxygen-enriched air as the oxidant comprising:
- (A) means for providing major oxidant for injection into a combustion zone said major oxidant provision means connected by conduit means to a source of oxidant comprising at least 30 volume percent oxygen, and comprising a central oxidant supply tube and a nozzle at the injection end of the supply tube, said nozzle having at least one orifice therethrough for passage of oxidant from the supply tube into the combustion zone;
- (B) an annular opening around the nozzle for providing minor oxidant to the combustion zone in proximity to the major oxidant injection so that minor oxidant is entrained into major oxidant immediately after injection of major oxidant into the combustion zone;
- and
- (C) means for providing gaseous fuel to said combustion zone in proximity to the minor oxidant provision means so that said gaseous fuel and minor oxidant form an interface within the combustion zone prior to contact between gaseous fuel and major oxidant.
1 more element
Dependencies are inferred from the claim text.