Method of simultaneous disposal of solid and liquid wastes

Details Method of simultaneous disposal of solid and liquid wastes Method of simultaneous disposal of solid and liquid wastes

1992-06-19

1994-09-13

Straub, Gary P.

Hazardous or toxic waste destruction or containment

Containment

Solidification, vitrification, or cementation

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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