Fuel staging methods for low NOx tangential fired boiler operation
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United States of America Patent
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Sep 14, 2004
Grant Date -
Jul 22, 2004
app pub date -
Jan 16, 2003
filing date -
Jan 16, 2003
priority date (Note) -
Expired
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Abstract
A tangential fired boiler has a circumferential wall defining a combustion zone and a plurality of fuel inlets disposed along the circumferential wall. The plurality of fuel inlets inject fuel at non-uniform rates in order to produce localized fuel rich, oxygen poor zones and fuel lean, oxygen rich zones within the combustion zone, and to cause ambient boiler gases to be entrained into and mix with the oxygen poor zone to achieve fuel staging of the boiler.
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