Studies on Enhancement of Reburning for Advanced NOx Control in Coal-Fired Boilers

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Title Studies on Enhancement of Reburning for Advanced NOx Control in Coal-Fired Boilers
Creator Chen, S. L.; Moller, E. C.; Heap, M. P.; Pershing, David W.
Publisher Digitized by J. Willard Marriott Library, University of Utah
Date 1988
Spatial Coverage presented at Pittsburgh, Pennsylvania
Abstract This paper summarizes an experimental study which was conducted to investigate the chemical constraints of the reburning process and identify reburning configurations for optimal NOx reduction. Tests were performed on a bench scale tunnel furnace to characterize and optimize the fuel-rich reburning zone and the fuel-lean burnout zone independently. Detailed measurements of unburned hydrocarbons, CO, NH3, and HCN were made at the reburning zone exit. The influence of the concentrations of reactive species was examined as were temperature effects for both the reburning and burnout zone. Results indicated that reburning zone chemistry was not rate limiting. The impacts of temperature and burnout zone oxidation were of major importance. Integration of the optimum reburning and burnout zone configurations resulted in increased NOx reduction. Over 80 percent reduction in NO x emissions was achieved with ammonium sulfate injection in the burnout zone under optimum reburning conditions.
Type Text
Format application/pdf
Language eng
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ARK ark:/87278/s60p12k7
Setname uu_afrc
ID 4966
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