VERFAHREN ZUR ENTSORGUNG VON STÄUBEN, DIE TOXISCHE ORGANISCHE STOFFE UND ÄHNLICHE VERBINDUNGEN ENTHALTEN.

摘要

The invention relates to a method of disposing of dusts containing toxic heavy metals, toxic organic substances and similar compounds and preferably originating from flue gas purification from, for example, refuse incinerators. The dusts are mixed with one or more additives to give a fusible blend and thermally treated. The glass formed can be taken to a higher-value re-use, and the hot waste gases arising during the fusion process are mixed with the dedusted and cooled waste gases of the refuse incinerator directly upstream of the entry to an HCl scrubber. Cooling to temperatures of 45 DEG to 80 DEG C is effected by injection of aqueous hydrochloric acid and/or water. The dilute hydrochloric acid formed in the HCl scrubber is separated by rectification into concentrated hydrochloric acid and a bottom fraction. The heavy metal compounds, salts and residual dusts which have remained in the dedusted flue gas and in the waste gas of the fusion process are enriched in the bottom fraction, separated off and must then be put into a landfill.