Characterization of ash deposition and heat transfer behavior of coals during combustion in a pilot-scale facility and full-scale utility Article

Gupta, S, Gupta, R, Bryant, G et al. (2009). Characterization of ash deposition and heat transfer behavior of coals during combustion in a pilot-scale facility and full-scale utility . ENERGY & FUELS, 23(5), 2570-2575. 10.1021/ef800913d

cited authors

  • Gupta, S; Gupta, R; Bryant, G; Wall, T; Watanabe, S; Riga, T; Narukawa, K

authors

abstract

  • Experimental measurements as well as theoretical models were used to investigate the impact of mineral matter of three coals on ash deposition and heat transfer for pulverized coal fired boilers. The ash deposition experiments were conducted in a pulverized fuel combustion pilot-scale facility and a full-scale unit. A mathematical model with input from computer-controlled scanning electron microscopy analysis of coal minerals was used to predict the effect of ash deposition on heat transfer. The predicted deposit thickness and heat flux from the model are shown to be consistent with the measurements in the test facility. The model differentiates the coals according to the deposits they form and their effect on heat transfer. The heat transfer predictions in the full-scale unit were found to be most suitable for the water wall under the furnace nose. The study demonstrates that the measurements in a full-scale unit can differ significantly from those in pilot-scale furnaces due to soot-blowing operations. © 2009 American Chemical Society.

publication date

  • May 21, 2009

published in

Digital Object Identifier (DOI)

start page

  • 2570

end page

  • 2575

volume

  • 23

issue

  • 5