Reducing sulphur di:oxide content of waste gas from small furnace - by prodn. of briquettes contg. anthracite, petroleum coke, limestone flour and binder

摘要

The SO2 content of waste gases from small furnaces is reduced by combining the S contained in the fuels, and liberated as SO2 during combustion, in the solid fuel residues, by mixing finely ground substances which bond S, esp. CaO or cpds. liberating CaO at higher temps., opt. drying the mixt. and processing the mixt. to briquettes. Fuels with higher ignition temps. and heating values are provided, and the briquettes formed from the dry mixt. have the compsn.: 75-95wt.% of anthracite or a fuel with comparable heating value and ignition temp., 3-20% of petroleum coke, 3-5% of limestone flour, and 3-5% of briquette binder, the rest being impurities. ADVANTAGE - A greater redn. in the SO2 emission is possible, at optimum desulphurisation temps. of 800-900 deg.C. Measures for desulphurisation of the waste gas are not needed.