Coal combustion by-product quality at two stoker boilers: Coal source vs. fly ash collection system design

Sarah M. Mardon, James C. Hower, Jennifer M.K. O'Keefe, Maria N. Marks, Daniel H. Hedges

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

Fly ashes from two stoker boilers burning Pennsylvanian Eastern Kentucky high volatile A bituminous coal blends were examined for their petrology and chemistry. The source coals have similar trace element contents. One of the ash collection systems was retrofitted with a baghouse (fabric filter) system, collecting a finer fly ash at a cooler flue gas temperature than the plant that has not been reconfigured. The baghouse ash has a markedly higher trace element content than the coarser fly ash from the other plant. The enhanced trace element content is most notable in the As concentration, reaching nearly 9000 ppm (ash basis) for one of the collection units. Differences in the ash chemistry are not due to any substantial differences in the coal source, even though the coal sources were from different counties and from different coal beds, but rather to the improved pollution control system in the steam plant with the higher trace element contents.

Original languageEnglish
Pages (from-to)248-254
Number of pages7
JournalInternational Journal of Coal Geology
Volume75
Issue number4
DOIs
StatePublished - Sep 15 2008

Keywords

  • Arsenic
  • Bottom ash
  • Coal
  • Fly ash
  • Mercury

ASJC Scopus subject areas

  • Fuel Technology
  • Geology
  • Economic Geology
  • Stratigraphy

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