Procedure for separating finely divided matter from a suspension

Details Procedure for separating finely divided matter from a suspension Procedure for separating finely divided matter from a suspension

1981-05-28

1983-06-14

Wyse, Thomas G.

Liquid purification or separation

Processes

Separating

210928, 162 35, 162189, B01D 2938

Patent

active

043881971

ABSTRACT:
Procedure for separating finely divided matter from a suspension by filtration in a periodically operated pressure filter including a filter tank into which the suspension to be filtered is supplied along with lime sludge (or CaCO.sub.3) as a filtering auxiliary substance. The lime sludge forms a filtering layer on the surface of filtering elements and the suspension to be filtered passes through this layer for separating sediment. The pressure filter contains a plurality of filtering elements extending downwardly from the roof of the filter tank so that the filtrate flows through the elements to a superposed filtrate collecting tank. The lime sludge collects on the outer surface of the filtering elements and is periodically detached by a countercurrent washing operation. Green liquor, from which the soda sediment is to be separated, is used as the suspension to be filtered.

REFERENCES:
patent: 1860570 (1932-05-01), Brodley et al.
patent: 3833464 (1974-09-01), Rolfe
patent: 4073678 (1978-02-01), Hammond et al.
patent: 4264445 (1981-04-01), Lumikko et al.

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