Fuel Processing Technology, Vol.91, No.3, 364-368, 2010
Modeling of solid fuel combustion in oxygen-enriched atmosphere in circulating fluidized bed boiler Part 2. Numerical simulations of heat transfer and gaseous pollutant emissions associated with coal combustion in O-2/CO2 and O-2/N-2 atmospheres enriched with oxygen under circulating fluidized bed conditions
The results of numerical computations for 670t/h CFB boiler are shown in this paper. The calculations have been carried out for two different so-called oxyfuel conditions, i.e. when combustion runs in a gas mixture based on O-2 and N-2. and another, when combustion takes place in N-2-free atmosphere of O-2-CO2, with various fraction of oxygen in both cases. Compared to conventional air-combustion, two crucial differences were taken into consideration in this paper: reduced volume of flue gas for oxygen-enriched environments and changed heat duty inside combustion chamber following from an increase in adiabatic temperature. Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.