System and method for urea decomposition to ammonia in a side stream for selective catalytic reduction
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United States of America Patent
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Mar 14, 2017
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N/A
app pub date -
Oct 3, 2013
filing date -
Oct 5, 2012
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Abstract
A method for reducing NOx emissions in the exhaust of a combined cycle gas turbine equipped with a heat recovery boiler and a catalyst effective for NOx reduction, wherein a slip stream of hot flowing exhaust gases is withdrawn from the primary gas flow after the catalyst at a temperature of 500° F. to 900° F. and directed through a fan to a continuous duct into which an aqueous based reagent is injected for decomposition to ammonia gas and the outlet of the continuous duct is connected to an injection grid positioned in the primary exhaust for injection of ammonia gas into the primary exhaust stream at a location upstream of the catalyst.
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