Journal
FUEL
Volume 101, Issue -, Pages 171-178Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2010.12.038
Keywords
Coal combustion; CFD model; Ash deposition; Slagging index
Categories
Funding
- Petroleum Technology Development Fund (PTDF) of the Federal Republic of Nigeria
- EPSRC [EP/F061188/1]
- EPSRC [EP/F061188/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/F061188/1] Funding Source: researchfish
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The slagging of heat transfer surfaces during the combustion of pulverized coal in power stations is a major problem as power generators strive to improve the efficiency of their plants. In this paper, a numerical model to predict ash deposition rates in boilers has been developed. The deposition model is based on the sticking tendency of ash particles on impaction on boiler walls. A numerical slagging index (NSI) that correlates with the practical performance of different coals has also been developed. The index is based on ash viscosity, ash fusibility and the ash loading. Experimental data from the Australian Coal Industries Research Laboratories (ACIRL) furnace have been used to validate the models. The predicted results from the ash deposition model on four different coals are in good agreement with the experimental measurements, and the new slagging index has successfully ranked the investigated coals according to their field performance. In general, the predicted results from both the ash deposition model and the new NSI are in good agreement with the experimental data. (C) 2011 Elsevier Ltd. All rights reserved.
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