Method of simultaneous disposal of solid and liquid wastes

Hazardous or toxic waste destruction or containment – Containment – Solidification – vitrification – or cementation

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588209, 588213, 588216, 588226, 588234, 588240, 588245, A62D 300, A61L 1100, B09B 300

Patent

active

053470680

ABSTRACT:
Method for simultaneous disposal of solid and liquid wastes including the steps of gasifying in a fixed bed pressure gasifier a gasification material containing coal and 1 to 70% of a solid waste material containing sulfur, hydrocarbons, PCBs, dioxins and/or heavy metals, to form a pollutant and dust-containing fixed bed pressure gasification crude gas; post-gasifying in a post-gasifier at a temperature greater than 1,000.degree. C. and with a dwell time of more than 2 seconds the crude gas together with an oxygen-containing gas and a liquid waste portion having a heat content of greater than 20,000 kJ/kg and containing hydrocarbons, PCBs and/or heavy metals to form a disposal gas; cooling the disposal gas to less than 200.degree. C. and cleaning it or process waste water to form a mixture of pollutant slurries; gasifying in an additional flow gasifier a mixture of the pollutant slurries, another liquid waste portion having a heat content of greater than 20,000 kJ/kg and containing hydrocarbons, sulfur, PCBs, heavy metals and/or dioxins and 3 to 35% of solid components containing greater than 10% mineral components and sulfur, heavy metals, PCBs, dioxins, furans and/or hydrocarbons, at a temperature more than 50.degree. C. above a melting point of the mineral components.

REFERENCES:
patent: T104901 (1984-12-01), Cox et al.
patent: 4274839 (1981-06-01), Leas
patent: 4422940 (1983-12-01), Cousino et al.
patent: 4732092 (1988-03-01), Gould

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