Treatment of waste and a rotary kiln therefor

Details Treatment of waste and a rotary kiln therefor Treatment of waste and a rotary kiln therefor

1989-10-31

1991-02-19

Favors, Edward G.

Furnaces

Refuse incinerator

Rotary drum

110226, 110238, 110344, 432106, 432111, A47J 3600, A47J 3621

Patent

active

049933310

ABSTRACT:
Method and apparatus for treating waste materials to produce aggregates wherein pellets comprised of a mixture of solids, liquid wastes and clay are dried by hot air in a dryer. The pellets are then fed to the pyrolysis zone of a rotary kiln wherein they are heated by hot gas from an oxidation zone of the kiln to drive off most of the volatile gases. Remaining volatile gases and the fixed carbon in the waste are oxidized in the oxidation zone, and the silicates in the clay are vitrified in a vitrification zone of the kiln to produce aggregates which are crushed and screened. Volatile gases given off from the pyrolysis zone are mixed with exhaust gases from the dryer to feed the burner for the vitrification zone and to supply oxygen to the oxidation zone.

REFERENCES:
patent: 3954069 (1976-05-01), Luken
patent: 4232614 (1980-11-01), Fitch et al.
patent: 4670054 (1987-06-01), Holtman et al.

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