Arrangement for washing and dewatering cellulose pulp

Details Arrangement for washing and dewatering cellulose pulp Arrangement for washing and dewatering cellulose pulp

2008-05-21

2011-11-01

Halpern, Mark (Department: 1741)

Paper making and fiber liberation

Apparatus

Reexamination Certificate

active

08048271

ABSTRACT:
Apparatus for washing and dewatering cellulose pulp is disclosed comprising: a rotatable press roll having a perforated outer surface for dewatering the pulp; a stationary guide surface arranged at a distance from the perforated outer surface so as to enclose the press roll in the circumferential direction, such that a substantially closed vat is defined between stationary guide surface and the press roll; a pulp passage, being provided between the perforated outer surface and its stationary guide surface, such that during operation, pulp is transported in the direction of rotation and, at the end of the pulp passage, is pressed in a pinch between the press roll and a second press roll. A radial distance between the stationary guide surface and the associated press roll is generally increasing towards the pinch, such that the vat diverges, towards the pinch.

REFERENCES:
patent: 3980518 (1976-09-01), Ljung et al.
patent: 5589035 (1996-12-01), Sundqvist
patent: 102977 (1996-07-01), None
International Search Report, PCT/SE2008/050597, dated Aug. 27, 2008.

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