Gas Cofiring for Performance Improvement and Emissions Reduction in Stoker Boilers

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Title Gas Cofiring for Performance Improvement and Emissions Reduction in Stoker Boilers
Creator Waterland, L. R.; Mason, H. B.; Gemmer, R. V.; Drennan, Scott A.
Publisher Digitized by J. Willard Marriott Library, University of Utah
Date 1999
Spatial Coverage presented at San Francisco, California
Abstract Cofiring a small amount of gas in solid-fuel fired boilers is an efficient and economical way to resolve a variety of emissions and performance problems. GRI has developed and demonstrated a specialized cofire retrofit package featuring dual, opposed, high pressure drop gas burners to control the combustion over the solid fuel. Earlier demonstrations on coal-fired stokers have shown cofire to reduce emissions, enhance performance, increase efficiency and lower operating costs. In the present work, the cofire package has been applied to another eight coal-fired stoker boilers at five sites. At the first site, cofire reduced particulate up to 60 percent for 20 percent gas firing. At the second site, gas cofire was used to reduce NOx emissions by 20 percent for 20 percent cofire. At the third site, cofire achieved 15 percent NOx reduction for 10 to 15 percent cofire, and allowed routine smokeless startup and load ramping. At the fourth site, cofire allowed the recovery of formerly derated 20 percent of boiler capacity with 10 percent cofire. At the fifth, 7 percent cofire allowed a flue gas recirculation system formerly needed for opacity control to be disconnected.
Type Text
Format application/pdf
Language eng
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Scanning Technician Cliodhna Davis
ARK ark:/87278/s60r9s1g
Setname uu_afrc
ID 11241
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