Abstract
This paper discusses the SOx reduction by feedwater in an industrial boiler. The combustion and fluid flow in the boiler is examined with emphasis on the effect of feedwater on SOx reduction. The simulation results indicate that feedwater injected into the DeSOx section has little influence on the heat absorption of the cooling pipes in the flue gas cooling section. The boiler exit temperature and the exit concentrations of SOx, NOx and CO are reduced by the feedwater. When the feedwater flowrate is increased to 1000 times the original value, the boiler exit temperature and the exit concentrations of SOx, NOx and CO are reduced to 1/2, 1/13, 1/13 and 1/20 of the original values.
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