Demonstration of Dioxins-reduced Small Size Incinerator (part 2)

Abstract

In this study, removal efficiency and adsorption characteristics of dioxins (polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans = PCDD/DF, and coplaner polychlorinated biphenyls) were investigated in activated alumina equipped in the exhaust gas line of small size incinerator. When model wastes containing 3 % polyvinyl chloride resin were incenerated, the concentrations of dioxins in the final treatment gas were 0.19 to 0.33 ng-TEQ/Nm³, which were adequately below the regulation (5 ng-TEQ/Nm³) . The removal rate was relatively high in higher chlorinated dioxin-congeners. Furthermore removal rates of acidic gas suches HCl, NO_x and SO₂ were also relatively high. By these results, it was found that activated alumina, as well as artificial zeolite, was effective for the removal treatment of dioxins in exhaust gas.