Combustion – Process of combustion or burner operation – Flame shaping – or distributing components in combustion zone
Patent
1982-05-21
1984-06-12
Dority, Jr., Carroll B.
Combustion
Process of combustion or burner operation
Flame shaping, or distributing components in combustion zone
431174, 431175, 431284, 431215, F23Q 900
Patent
active
044539134
ABSTRACT:
A pair of burner tubes are arranged in concentric relationship. Fuel and air in a rich fuel-air ratio is provided to the central burner tube, and fuel and air in a lean fuel-air ratio is provided to the outer burner tube. The rich combination of fuel and air is partially burned at a temperature of about 2,500.degree. F. while the lean combination of fuel and air is burned at a temperature of less than 2,800.degree. F., and the flames from the burner tubes are mixed at the ends of the burner tubes to form a final flame envelope and to finish the combustion of the rich mixture. Exhaust gas is directed about the burner tubes, and combustion supply air is circulated about and preheated by the exhaust gas conduits and the outer burner tube. The separate combustion of the rich and lean fuel-air mixtures at relatively low temperatures and the subsequent mixing of the flames from the burner tubes results in low NOx emissions and results in high luminosity of the final flame envelope.
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Dority Jr. Carroll B.
The Cadre Corporation
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