Abstract
We examined the applicability of a coal combustion model to commercial boilers. The coal combustion model, which has char and NOx reaction models, has been developed on the basis of experimental data obtained by using a drop tube furnace (coal feed rate : 0.6kg/h). We applied the coal combustion model to the simulation from a laboratory scale furnace (coal feed rate 25kg/h) to commercial boilers (coal feed rates : 100 to 300t/h). 1) The model was applicable to any size furnaces. 2) Reduction reactions by hydrocarbon radicals were important to predict NOx concentration. 3) The predicted furnace exit gas temperatures were in agreement with the measured ones with less than 30℃.
