Method and apparatus for drying sewage sludge

Details Method and apparatus for drying sewage sludge Method and apparatus for drying sewage sludge

1989-05-24

1990-12-04

Bennet, Henry A.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 60, 34 35, 34 86, F26B 700

Patent

active

049743350

ABSTRACT:
A method and apparatus for drying sewage sludge includes diverting steam escaping during the drying of the sewage sludge and feeding the steam to a compressor. Thermal energy of the compressed and therefore heated steam is supplied to the sewage sludge to be dried through a heat exchanger system. Condensate is drawn off from the heat exchanger system and collected. Thermal energy of the condensate is supplied to the sewage sludge prior to the drying for reinforcing a preliminary degassing.

REFERENCES:
patent: 3805715 (1974-04-01), Keller
patent: 3953927 (1976-05-01), Hoffert

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