Reduction of Atmospheric Pollution by the Application of Fluidized-Bed Combustion and Regeneration of Sulfur-Containing Additives.

摘要

The report gives results of using a bench-scale,fluidized-bed combustion plant (capable of operating at 10-atm pressure) to evaluate the effects of combustor operating variables on the following major response variables: SO2and NO levels in the flue gas,combustion efficiency,additive utilization,and heat-transfer coefficients. It also gives results of combustor testing,using a variety of coals: a highly caking,high-volatile bituminous coal, a high ash subbituminous coal,and a low-heating-value lignite. It reports material balance data for four trace elements--Hg,Pb,Be,and F--and for Na concentrations in the particulate matter entrained in the flue gas from the combustor. Kinetics of the reaction of half-calcined dolomite with SO2was found to be first order with respect to the SO2concentration in the presence of H2O vapor and approximately three-fourths order in the absence of H2O vapor.