Co-firing pulverised coal and biomass: a modeling approach

A CFD modelling study has been undertaken to examine the co-firing of pulverised coal and biomass with particular regard to the burnout of the larger diameter biomass particles. Computations were based on a research combustion facility that replicates an industrial coal-fired power station. Three pe...

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Bibliographic Details
Published in:Proceedings of the Combustion Institute 2005-01, Vol.30 (2), p.2955-2964
Main Authors: Backreedy, R.I., Fletcher, L.M., Jones, J.M., Ma, L., Pourkashanian, M., Williams, A.
Format: Article
Language:English
Subjects:
Biomass
Blends
CFD
Co-combustion
Power station
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Summary:A CFD modelling study has been undertaken to examine the co-firing of pulverised coal and biomass with particular regard to the burnout of the larger diameter biomass particles. Computations were based on a research combustion facility that replicates an industrial coal-fired power station. Three percent, by mass, of pinewood was blended with a bituminous UK coal, and the effects of the wood particle size and shape on the burnout of the combined wood and coal char were investigated. The effect of varying the devolatilisation and char combustion rate constants for the biomass component in the blend was also investigated. It was concluded that the combustion of small (200 μm) wood particles was rapid but the rate of combustion of larger particles was dependent on their composition, size, and shape.
ISSN:1540-7489
1873-2704
DOI:10.1016/j.proci.2004.08.085