Record Display for the EPA National Library Catalog

RECORD NUMBER: 27 OF 37

OLS Field Name OLS Field Data
Main Title Pilot-Scale Development of a Low-NOx Coal-Fired Tangential System.
Author Kelly, J. T. ; Brown, R. A. ; Chu, E. K. ; Wightman, J. B. ; Pam, R. L. ;
CORP Author Acurex Corp., Mountain View, CA. Energy and Environmental Div.;Industrial Environmental Research Lab., Research Triangle Park, NC.
Year Published 1981
Report Number EPA-68-02-1885; EPA-600/7-81-137 ; IERL-RTP-1233
Stock Number PB81-242513
Additional Subjects Air pollution control ; Nitrogen oxides ; Burners ; Combustion products ; Industrial wastes ; Design criteria ; Performance evaluation ; Revisions ; Furnaces ; Technology ; Electric power plants ; Coal fired power plants ; Stationary sources
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB81-242513 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 239p
Abstract
A 293 kWt (1 million Btu/hr) pilot-scale facility was used to develop a low-NOx pulverized-coal-fired tangential system. Conventional tangential system burner and vortex characterization tests defined the major system design requirements for a low-NOx system. Given these requirements, a burner concept was developed which achieves low NOx by directing the fuel and a fraction of the secondary combustion air into the center of the furnace, with the remaining secondary combustion air directed horizontally and parallel to the furnance walls. Such separation of secondary combustion air creates a fuel-rich zone in the center of the furnace where NOx production is minimized. This combustion modification technique has lowered NOx 64%, relative to conventional tangential firing, by injecting 85% of the secondary air along the furnace walls. Under these conditions, NO emissions were 180 ppm corrected to 0% 02. Also at these conditions, CO, UHC, and unburned carbon emissions were less than 40 ppm, 3 ppm, and 2.4%, respectively, comparable to conventional tangentially fired pilot-scale results. Also, the modification places a blanket of air on the furnace walls which reduces wall corrosion and slagging. With the modification, 02 concentrations above the burner level (near the furnace wall) were 12%, nearly three times conventional tangential pilot-scale system wall oxygen concentrations.