Furnaces – Process – Incinerating refuse
Patent
1985-08-30
1986-11-04
Favors, Edward G.
Furnaces
Process
Incinerating refuse
34 9, 110221, 110224, 110238, F23G 704
Patent
active
046204938
ABSTRACT:
A method and apparatus for reducing the moisture content of a moist sewage sludge having a moisture content of about 50% to 80% and formed of small cellular micro-organism bodies having internally confined water is provided. A hot liquid metal is circulated in a circulation loop and the moist sewage sludge is injected in the circulation loop under conditions of temperature and pressure such that the confined water vaporizes and ruptures the cellular bodies. The vapor produced, the dried sludge, and the liquid metal are then separated. Preferably, the moist sewage sludge is injected into the hot liquid metal adjacent the upstream side of a venturi which serves to thoroughly mix the hot liquid metal and the moist sewage sludge. The venturi and the drying zone after the venturi are preferably vertically oriented. The dried sewage sludge recovered is available as a fuel and is preferably used for heating the hot liquid metal.
REFERENCES:
patent: 2723954 (1955-11-01), Young
patent: 3909410 (1975-09-01), Neukamm
patent: 3985510 (1976-10-01), Taylor
patent: 4097378 (1978-06-01), St. Clair
patent: 4203376 (1980-05-01), Hood
patent: 4429643 (1984-02-01), Mulholland
Churm Arthur A.
Favors Edward G.
Hightower Judson R.
The United States of America as represented by the United States
Weinberger James W.
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