Dynamic Simulation of a Circulating Fluidized Bed Boiler of Low Circulating Ratio with Wide Particle Size Distributions

摘要

A steady state model of a coal fired CFB boiler considering the hydrodynamics, heat transfer and combustion is presented. This model predicts the flue gas temperature, the chemical gas species (O_2, H_2O, CO, CO_2 and SO_2) and char concentration distributions in both the axial and radial location along the furnace including the bottom and upper portion. The model was validated against experimental data generated in a 35 t/h commercial CFB boiler with low circulating ratio.