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Development of Fireside Performance Indices for Coal-Fired Utility Boilers

  • Christopher J. Zygarlicke
  • Kevin C. Galbreath
  • Donald P. McCollor
  • Donald L. Toman

Abstract

A series of eight fireside performance indices have been developed for pulverized coal-fired utility boiler systems. The indices are calculated to predict slagging, high-temperature fouling, low-temperature fouling, slag tapping ability, opacity, tube erosion, coal grindability, and sootblower necessity. The indices are most useful for screening new fuels or fuel blends for pulverized coal-fired systems. Coal data input required to calculate the indices includes proximate/ultimate analysis results, elemental oxide coal ash chemistry, coal mineral quantities, and juxtaposition as derived using computer-controlled scanning electron microscopy and quantities, of organically bound or submicron mineral components as determined by chemical fractionation analysis. Limited boiler inputs are also required, such as boiler type, power-generating capacity, percentage of load, gas velocities, type of particulate control, and basic furnace dimensions. The indices were formulated primarily by combining inorganic transformation and ash deposition theory with empirical correlations derived from bench-, pilot-, and full-scale combustion tests. The ash deposition and opacity indices have been validated at several full-scale utility boilers.

Keywords

Bituminous Coal Utility Boiler Powder River Basin Hardgrove Grindability Index Tube Erosion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1996

Authors and Affiliations

  • Christopher J. Zygarlicke
    • 1
  • Kevin C. Galbreath
    • 1
  • Donald P. McCollor
    • 1
  • Donald L. Toman
    • 1
  1. 1.Energy & Environmental Research CenterUniversity of North DakotaGrand ForksUSA

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