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System and Method for Minimizing Nitrogen Oxide (NOx) Emissions in Cyclone Combustors

United States Patent Application

20090007827
A1
View the Complete Application at the US Patent & Trademark Office
A combustion system equipped with one or more carbonaceous fuel burning combustors (e.g., slagging Cyclone combustor) and adapted to minimize nitrogen oxide (NO.sub.x) formation during staged combustion operation by selective introduction of oxygen through at least one of the combustors to create a hot sub-stoichiometric combustion zone by reducing the diluent effect of nitrogen and other inert gases present in the oxidizer/air. A method of operating the combustion system of the invention with reduced NO.sub.x emissions is also disclosed.
Sarv, Hamid (Canton, OH), Maringo, Gerald J. (Canton, OH), Sayre, Alan Neal (North Canton, OH), Varagani, Rajani Kanth (Bear, DE)
12/ 129,052
May 29, 2008
[0001] This Invention was made with Government support under Contract No. DE-FC26-05NT42301 awarded by the Department of Energy. The Government may retain certain rights in this invention.