Title: Combustion process in a biomass grate fired industry furnace: a CFD study

Authors: T. Klason, X.S. Bai

Addresses: Department of Heat and Power Engineering, Division of Fluid Mechanics, Lund Institute of Technology, Box 118, SE-221 00 Lund, Sweden. ' Department of Heat and Power Engineering, Division of Fluid Mechanics, Lund Institute of Technology, Box 118, SE-221 00 Lund, Sweden

Abstract: This paper presents a CFD investigation of the combustion process in a 50 MW grate fired furnace. The CFD results were compared with available experimental data at the furnace outlet to validate the models for the volatile oxidation and NO_x formation. The models were then used to predict the effect of an |ECO| tube system on NO_x emissions. It was shown that with an improved flow structure and air distribution, 30% NO_x reduction can be obtained. CFD results revealed the impact of load and fuel moisture on the flow structure, the temperature distribution and the flow residence time.

Keywords: biomass combustion; flow residence time; CFD modelling; nitrogen oxide; furnace emissions; computational fluid dynamics; grate fired furnaces.

DOI: 10.1504/PCFD.2006.010581

Progress in Computational Fluid Dynamics, An International Journal, 2006 Vol.6 No.4/5, pp.278 - 286

Published online: 03 Aug 2006 *

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