B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
182/87
B01D 33/06 (2006.01) B01D 33/01 (2006.01) B01D 35/22 (2006.01) D21C 9/18 (2006.01)
Patent
CA 1082608
Abstract of the Disclosure A pulp dewatering apparatus is disclosed in which back-flushing for cleaning of the screening surface is achieved without the use of pumps, valves or the like. The apparatus includes a cylindrical housing in which is mounted a central hollow bearing body which communicates with the exter- ior of the housing through one or more hollow supporting arms. A cylindr- icular screening body is slidably and rotationally mounted on the bearing body and is reciprocated by a longitudinally reciprocating shaft which extends through the bearing body and is attached at its face end to the screening body. The shaft is driven slowly in the direction of pulp flow and at increased speed in the opposite direction. Filtering takes place during the slow stroke and back-flushing takes place during the fast stroke.
250251
Fetherstonhaugh & Co.
Kvaerner Pulping Aktiebolag
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