Method and installation for the treatment of material contaminated with toxic organic compounds

US4794871A · kind A · utility

Assignee

• Environment Protection Engineers Inc. · US

Inventors

• Rudiger Schmidt · Munich, DE
• Kurt Kugler · Lappersdorf, DE

Key dates

• Filing date: Mar 18, 1988
• Grant date: Jan 3, 1989
• Expiry date: Mar 18, 2008

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F23G2203/601
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Method and installation or apparatus for the treatment of material contaminated with toxic organic compounds in which the material is subjected to a thermal treatment to destroy or decompose the toxic compounds, the thermal treatment being carried out in two stages, i.e. a first stage in which the contaminated material is heated to a temperature of not more than 500.degree. C. under pyrolysis conditions in an indirectly heated rotary furnace, and a second stage in which the solid residue remaining in the first stage is heated in a second furnace to a temperature of at least 500.degree. C. until the concentration of toxic organic compounds in the residue is in the ppb range and preferably 1 ppb or less, and in which the gaseous reaction products of the first and second stages are supplied to a combustion chamber and there burnt at a temperature which is sufficient to completely destroy all the toxic organic compounds contained therein.