Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Natural Gas Reburning for NOx Control on a Cyclone-Fired Boiler.
Author Hall, R. E. ; Borio, R. W. ; Lewis, R. D. ; Booth, R. ;
CORP Author ABB Combustion Engineering, Windsor, CT. ;Energy Systems Associates, Pittsburgh, PA.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Publisher 1991
Year Published 1991
Report Number EPA-68-02-4280; EPA/600/D-91/146;
Stock Number PB91-223164
Additional Subjects Nitrogen oxides ; Natural gas ; Boilers ; Air pollution control ; Combustion ; Furnaces ; Stationary sources ; Field tests ; Laboratory tests ; Technology assessment ; Combustion chemistry ; Reburning ; Fuel staging
Library Call Number Additional Info Location Last
NTIS  PB91-223164 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 11/26/1991
Collation 18p
The paper discusses natural gas reburning (fuel staging) for nitrogen oxide (NOx) control on a cyclone-fired boiler. Reburning is an in-furnace NOx combustion modification technology that has been shown to reduce NOx by 50-60%. Reburning is accomplished by injecting fuel downstream of the primary combustion zone, creating a reducing zone in which NOx formed in the primary zone reacts with hydrocarbon radicals to form molecular nitrogen and water vapor. Burnout air is added downstream of the reburn zone to complete the combustion process at a lower temperature. Bench- and pilot-scale tests in the 1980s provided results on the importance of stoichiometry in the reburn zone, residence time, and the fuel nitrogen content of the reburn fuel. To apply reburn technology to a full-scale boiler, a reburn demonstration has been initiated on a 108 MWe cyclone-fired boiler at Ohio Edison's Niles Station. A cyclone boiler was selected because it is an inherently high NOx emitter and most low NOx combustion modification technologies are not applicable to cyclone and other wet-bottom boilers. Parametric tests have shown that NOx can be reduced by 50-60% with acceptable boiler operation by injecting natural gas into the reburn zone to account for 15-18% (fuel equivalent) of the boiler's heat load.