Furnaces – Process – Burning pulverized fuel
Patent
1994-08-08
1996-06-25
Bennett, Henry A.
Furnaces
Process
Burning pulverized fuel
110104B, 110261, 110264, 431183, F23D 100
Patent
active
055290000
ABSTRACT:
Pulverized coal and air flowing-in a coal nozzle are distributed for combustion with low NOX generation by a concentric central duct with long exterior spiraling vanes which extend upstream and attach to a support pipe extending further upstream in the nozzle. The space from the downstream end of the support pipe to the upstream end of the central duct, and the cross section of the pipe relative to the cross section of the central duct regulate the entry of coal and air into the central duct from which the flow emerges with reduced velocity as a central stream stabilizing the flame. The central duct also has an exterior short vane attached to each long vane to separate the pulverized fuel and air outerflow into fuel-enriched swirling streams and fuel-depleted recirculation zones.
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Principles of Combustion Engineering For Boilers, Academic Press 1987, Chapter Three, The Combustion of Coal as Pulverized Fuel through Swirl Burners by T. F. Wall, pp. 319-327.
Internal Fuel Staging in Low NO.sub.x Burner Designs by J. W. Allen & P. R. Beal, The American Society of Mechanical Engineers, Paper 91-JPGC-FACT-4 Presented at the International Power Generation Conference, Oct. 6-10, 1991, San Diego, CA pp. 1-8.
Doyle Brian W.
Giovanni Dan V.
Hartel Edward O.
Hurley John F.
Bennett Henry A.
Combustion Components Associates, Inc.
Electric Power Technologies, Inc.
Tinker Susanne
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