Sludge drying system with sand recycle

Details Sludge drying system with sand recycle Sludge drying system with sand recycle

1979-03-09

1981-02-03

Petrakes, John

Furnaces

With fuel treatment means

Preliminary refuse treatment means

110247, 110346, 432139, F23G 504, F27B 922

Patent

active

042481643

ABSTRACT:
A process and system to dry wet sewage sludge with hot sand and to burn the dried sludge. The sand is heated in a heating device by burning dried sludge, and the hot sand is mixed with wet sludge in a drying device. Thereby moisture is driven from the wet sludge to dry it. The dried sludge and sand are separated, and the sand returned to the heating device while the dried sludge is burned to heat the sand.

REFERENCES:
patent: 2147151 (1939-02-01), Connolly
patent: 2754105 (1956-07-01), Pistorius et al.
patent: 3411465 (1968-11-01), Shirai
patent: 3625165 (1971-12-01), Ishigaki
patent: 3954069 (1976-05-01), Loken
patent: 3958920 (1976-05-01), Anderson
patent: 3968756 (1976-07-01), Yamada
patent: 4154643 (1979-05-01), Cook et al.

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