System and method for controlling NOx emissions from boilers combusting carbonaceous fuels without using external reagent
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United States of America Patent
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Dec 27, 2005
Grant Date -
Jun 24, 2004
app pub date -
Dec 18, 2002
filing date -
Dec 18, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system and a method for controlling NOX emissions from a boiler that combusts carbonaceous fuels. The method includes the steps of (a) introducing carbonaceous fuel and combustion air into a furnace of the boiler for combusting the carbonaceous fuel in oxidizing conditions and producing flue gas including NOX and CO, and (b) leading flue gas from the furnace to a catalyst section in a flue gas channel for converting, free from introducing an external agent for NOX reduction, NOX to N2 and CO to CO2 by using CO as the reductant of NOX on a catalyst in the catalyst section.
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