Method and apparatus for reducing NO.sub.x emissions in a gas burner
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United States of America Patent
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Jan 20, 1998
Grant Date -
N/A
app pub date -
Jun 26, 1995
filing date -
Jun 26, 1995
priority date (Note) -
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Abstract
A method and apparatus for reducing NO.sub.x emissions in a gas burner in which the burner includes a burner supply for supplying fuel gas and primary air to the furnace and projecting the fuel gas into the furnace, a secondary air supply for supplying secondary air to the burner, and a recirculating device for mixing the secondary air with the spent gases inside the furnace, which is then recirculated and combusted to reduce NO.sub.x gases. The method of the invention includes the steps of supplying fuel gas and primary air to the furnace, projecting the fuel gas into the furnace, combusting the fuel gas and primary gas to produce spent gases, supplying secondary air to the furnace, mixing the secondary air with the spent gases inside the furnace to produce diluted air, and recirculating and combusting the diluted air with the fuel gas and primary air to reduce NO.sub.x emissions.
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