PROCESS FOR REDUCING DIOXIN AND FURAN EMISSIONS IN THE STACK GAS FROM AN INCINERATOR

摘要

A process for reducing emissions of dioxins and furans in a stack gas from the incineration of organic materials, comprising: incinerating the organic material; adding one or more dioxine-reactive materials which are deposited on the flyash or on a supplemental particulate support optionally added upstream of an apparatus for removing flyash from the gaseous products of incineration prior to their emission in a stack gas, and which under the conditions prevailing in the apparatus will react with the dioxins in and from said gaseous products from said incineration step to produce one or more corresponding dioxin-derivative materials which are preferably substantially retained on the flyash or supplemental particulate support or both through the incinerator and which are periodically or continuously removed with said flyash and supplemental particulate support from the flyash/particulate removal apparatus, or in the alternative, adding the one or more dioxin-reactive materials via the addition of a particulate material including the one or more dioxin-reactive materials therein or thereon upstream of the flyash removal apparatus; and, maintaining the one or more dioxin-reactive materials in contact with the dioxins in sufficient concentrations and for a sufficient time to reduce the concentration of dioxins in and from said gaseous products through the formation of said dioxin-derivative materials.