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 NOx formation. The models were then used to predict the effect of an |ECO| tube system on NOx emissions. It was shown that with an improved flow structure and air distribution, 30% NOx 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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