Light shredded automotive wastes disposed of by pyrolysis and gasification in shaft with supplementary side-injectors

摘要

In a waste disposal process shredded light residues of different consistency are deposited in a high-temperature shaft and burned in a high temperature zone in which they are especially exposed to exposed to injectors distributed around the shaft wall where they melt and are gasified. In the process shredded light fractions of automotive wastes are introduced into a melting shaft with a melting zone into which oxygen is introduced by jets. The resulting reaction products descend with incompletely burned organic substances through suction passages towards a furnace. The pyrolysis coke forming above the furnace with the incoming oxygen is burned. Raw gas between the two injector planes is withdrawn by suction units for further use. The residues located above the high temperature injector zone are exposed to injectors distributed around the shaft wall where they melt and are gasified. The feed injectors are jets of any kind, worm feed injectors, extrusion units operating in conjunction with a heating medium e.g. hot air, hot exhaust gases or pre-heated liquid media. In a preferred embodiment the injectors are burners fed by cold or pre-heated air or oxygen.