1990•OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information)Requires access
Integrated SO sub x /NO sub x emission control system (IS/NECS)
G. Green, J.B. Doyle, Lakewood Wilcox Co.
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Abstract
This paper reports that in a continuing effort to achieve a cleaner environment, a public service company of Colorado is planning to install an integrated SO{sub x}/NO{sub x} emission control system (IS/NECS) on Unit 4 at the Arapahoe Steam Electric Generating Station in Denver, Colorado, which is currently burning low sulfur coal. Nitrogen oxide (NO{sub x}) emissions would be reduced through a combination of an innovative burner replacement with overfired air and a urea furnace injection system. Sulfur dioxide (SO{sub 2}) emissions would be reduced using dry calcium or sodium injection systems in conjunction with flue gas humidification. During the demonstration test program, these emission control systems would be operated to achieve a goal of 70 percent reduction in NO{sub x} and SO{sub 2}. The emission control systems should achieve these reductions at costs lower than other currently available technologies. An additional objective of this program is to test the effectiveness of the integrated systems on a high-sulfur-content coal. The test program will also examine an apparent operational advantage when combining an urea injection system with a dry sodium reagent injection system.