Case study of the conversion of tangential- and wall-fired units to low-NOx combustion: Impact on fly ash quality

Fly ash quality is affected by the conversion of boilers to low-NOx combustion, and can vary along the lines of fineness, amount and types of carbon, and relative amounts of glass and crystalline inorganic phases. These variables affect the marketability of the fly ash. Fly ash characteristics were...

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Bibliographic Details
Published in:Waste management (Elmsford) 1998-01, Vol.17 (4), p.219-229
Main Authors: Hower, James C., Rathbone, Robert F., Robl, Thomas L., Thomas, Gerald A., Haeberlin, Bethel O., Trimble, Alan S.
Format: Article
Language:English
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Summary:Fly ash quality is affected by the conversion of boilers to low-NOx combustion, and can vary along the lines of fineness, amount and types of carbon, and relative amounts of glass and crystalline inorganic phases. These variables affect the marketability of the fly ash. Fly ash characteristics were studied in three coal-fired combustors before and after conversion to low-NOx combustion. One combustor was wall-fired and two were tangentially-fired at the same Illinois power plant. Each unit produced a post conversion fly ash that was higher in carbon than that produced prior to conversion. At least two of the units produce post-conversion ashes which still meet carbon limitations or loss on ignition.
ISSN:0956-053X
DOI:10.1016/S0956-053X(97)10008-3