Method for drying sludge

Details Method for drying sludge Method for drying sludge

1978-10-13

1981-03-10

Yudkoff, Norman

Concentrating evaporators

Processes

Involving waste liquid

159 16R, 159 8, 159 6W, B01D 100

Patent

active

042552320

ABSTRACT:
Pasty, aqueous sludges of industrial or sewage treatment origin are dried for further use as raw material. The sludge particles are loosened by intense motion and substantially dry gases are introduced under pressure into the loosened sludge. The moisture enriched gases are removed from the sludge. The loosening and drying may be facilitated by repeatedly and sequentially increasing and decreasing the total surface area of the sludge. The intense motion is imparted to the sludge by at least one sludge stirring member and the drying gases may be introduced through the stirring member. The surface area of the sludge may be increased by plough-shaped or scraper-shaped tools. The surface area of the sludge may be decreased by rollers.

REFERENCES:
patent: 803051 (1905-10-01), Edson et al.
patent: 2284272 (1942-05-01), Franklin et al.
patent: 3842052 (1974-10-01), Gordini et al.

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