Process for the pyrolysis of waste materials
AssigneeBabcock Krauss-Maffei Industrieanlagen GmbH
InventorsRudiger Schmidt, Franz Steininger
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Abstract
The emission of halogens and sulfur dioxide and the formation of water-soluble compounds of heavy metals are suppressed in the pyrolysis of waste in a carbonization zone at a temperature in the range from 300.degree. to 600.degree. C. by adding a fine-grained basic material to the waste prior to completion of the pyrolysis of the waste in the carbonization zone.
Claims16
A method of suppressing the emission of halogens and sulfur dioxide and the formation of water-soluble compounds of heavy metals in the pyrolysis of carbonaceous waste in an indirectly heated revolving tubular furnace at temperatures in the range from 300.degree. to 600.degree. C. to form low-temperature coke, wherein the improvement comprises the steps of (a) adding a first quantity of a fine-grained basic material to the waste prior to completion of the pyrolysis of the waste in the revolving tubular furnace, (b) mixing the pyrolysis gases leaving the revolving tubular furnace with a second quantity of fine-grained basic material, and (c) passing the gases through a dust extractor, whereby a dense, compact low-temperature coke having reduced dust content is produced.
Dependencies are inferred from the claim text.