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US 5,131,838 AGranted
Staged superposition burner
AssigneeSelas Corporation of America
InventorsWayne C. Gensler, John J. Van Eerden, Chad F. Gottschlich
Life of this patent
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Abstract
A staged, superposition gaseous fuel burner provides substantial reduction of nitrogen oxide content in the combustion gases by providing a transverse turning plate in the burner tip and by staging the delivery rich combustion gases, by introducing premix gaseous fuel in stages spaced with respect to incoming secondary air, thereby exposing the incoming secondary air to spaced stages of the rich mixture.
Claims11
A gaseous fuel burner comprising a burner body having a burner tip installed in a wall of a furnace or the like for combustion of gaseous fuel therein, comprising:
- a primary supply means for introducing a mixture of primary gaseous fuel and primary air as a premix forwardly along said burner body;
- said burner having a tip for discharging said premix in a direction extending along an inner surface of said furnace wall, secondary air supply means comprising a secondary air passage extending along said burner body and having a secondary air outlet opening which is at a location spaced from said premix discharge of said tip, said burner tip having a transversely arranged separator forming a guide shaped to cause outward flow of said secondary air for ultimate blending with said premix discharge;
- and
- said burner tip comprising at least two spaced-apart premix discharges, one forming a near premix discharge area which is closer to the secondary air point of introduction and the other forming a far premix discharge area which is farther away from the secondary air point of introduction, whereby said spaced-apart premix discharges provide for staged mixing of said premix with said secondary air.
1 more element
Dependencies are inferred from the claim text.