Record Display for the EPA National Library Catalog


Main Title Program for Reduction of NOx from Tangential Coal-Fired Boilers. Phase I.
Author Blakesle, C. E. ; Selke, A. P. ;
CORP Author Combustion Engineering, Inc., Windsor, Conn.
Year Published 1973
Report Number EPA-68-02-0264; 650/2-73-005;
Stock Number PB-226 547
Additional Subjects Air pollution ; Nitrogen oxides ; Combustion control ; Abatement ; Coal ; Boilers ; Flue gases ; Circulation ; Combustion chambers ; Water injection ; Economic analysis ; Sampling ; Performance evaluation ; Corrosion ; Cost effectiveness ; Air pollution control ; Overfire mixing
Library Call Number Additional Info Location Last
NTIS  PB-226 547 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 183p
The report concerns a study to develop a pilot field-test program to evaluate combustion modification techniques to reduce NOx emissions from tangentially coal-fired steam-generating units. The report includes details of the preliminary test program, including analytical measurement and sampling techniques, engineering drawings, cost estimates, and schedules. Overfire air is the least expensive technique for controlling NOx, incurring no loss in unit efficiency or increased operating expenses. Flue gas recirculation is significantly more costly, requires additional fan power, and (in existing units) could result in a 10-20% decrease in load capability due to increased gas flow weights. Water injection into the fuel-firing zone has the lowest initial equipment cost; however, losses in unit efficiency (resulting in increased fuel costs and significant water consumption) make it the most expensive system to operate. The cost of applying controls to existing units generally is twice that of new units. (Modified author abstract)