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International Journal of Energy for a Clean Environment
SJR: 0.195 SNIP: 0.435 CiteScore™: 0.74

ISSN Imprimir: 2150-3621
ISSN En Línea: 2150-363X

International Journal of Energy for a Clean Environment

Formerly Known as Clean Air: International Journal on Energy for a Clean Environment

DOI: 10.1615/InterJEnerCleanEnv.v7.i4.20
pages 327-341

CARBON BURNOUT OF PULVERIZED COAL IN POWER STATION FURNACES

R. I. Backreedy
Energy and Resources Research Institute / Centre for Computational Fluid Dynamics, University of Leeds, Leeds LS2 9JT, UK
L. M. Fletcher
Energy and Resources Research Institute / Centre for Computational Fluid Dynamics, University of Leeds, Leeds LS2 9JT, UK
J. M. Jones
Energy and Resources Research Institute / Centre for Computational Fluid Dynamics, University of Leeds, Leeds LS2 9JT, UK
L. Ma
Energy and Resources Research Institute / Centre for Computational Fluid Dynamics, University of Leeds, Leeds LS2 9JT, UK
Mohamed Pourkashanian
Department of Fuel and Energy, Energy and Resources Research Institute / Centre for Computational Fluid Dynamics, University of Leeds, Leeds LS2 9JT, UK
A. Williams
Department of Fuel and Energy, Energy and Resources Research Institute / Centre for Computational Fluid Dynamics, University of Leeds, Leeds LS2 9JT, UK
K. Johnson
ALSTOM Power Derby, Sinfin Lane, Derby, DE24 9GH, UK
D. J. Waldron
ALSTOM Power Derby, Sinfin Lane, Derby, DE24 9GH, UK
P. Stephenson
RWE Power International, Engineering Division, Windmill Hill Business Park, Swindon, SN5 6PB, UK

SINOPSIS

The degree of carbon burnout in pulverized fuel-fired power stations is important because it is linked with power plant efficiency and coal ash suitability for construction purposes. The use of computational methods to calculate carbon burnout in such systems has been aided by the increasing availability of fast computers and improvements in computational methodologies. Despite recent advances in fluid flow, coal devolatilization, and coal combustion models, the use of CFD methods for detailed design purposes or for the selection of commercial coals is still limited. In parallel, industrial engineering codes, which combine simplified thermal models with advanced coal combustion models, are still undergoing development since they provide economic advantages over detailed CFD analysis. Although the major coal combustion processes are well established, an understanding regarding the role of coal macerals and the influence of ash on the combustion process is still lacking. A successful coal model must be able to handle all the complexities of combustion, from the details of the burner geometry through the formation of unburned carbon as well as NOx. The development of such a model is described here.


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