emissions in furnaces through the concentration of solid fuel as compared to air
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United States of America Patent
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-
Jan 6, 2009
Grant Date -
Nov 23, 2006
app pub date -
May 15, 2006
filing date -
May 19, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A device for optimizing coal-air proportions entering a furnace is disclosed. The invention generally comprises a burner nozzle having two ends and an outer tube forming a perimeter of the burner nozzle; an entry spool having a rear wall and defining an inlet port at one of the ends of the burner nozzle; an inner tube formed within the burner nozzle; an annular blade chamber defined between the outer tube and the inner tube; and, a blade formed within the blade chamber configured as an extension of the rear wall of the entry spool, the blade twisted to form a spiral around the inner tube, wherein fuel particles can be separated from a primary air stream and collected on the blade to form a coal-concentrated stream for entry into the furnace. As a result, three separate streams are injected into the furnace, thereby minimizing NOx through the concentration of solid fuel.
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