Device for the fractionation of pulp

Details Device for the fractionation of pulp Device for the fractionation of pulp

1990-03-13

1992-06-30

Hajec, Donald T.

Classifying, separating, and assorting solids

Sifting

With liquid treatment

209 17, 209393, 210304, 210488, B07B 122, D21D 500

Patent

active

051260395

ABSTRACT:
The invention relates to a device for the fractionation of pulp, having a chamber (1) which has a circular cross section and has in its upper section an inlet (2) for the pulp to be fractionated and in its lower section an outlet (3) for the first fraction. In addition, the chamber (1) has a screen which is rotatable about its vertical axis (7), has a circular horizontal cross section and is closed at its ends in relation to the chamber, the screen having on its circumference a plurality of apertures and inside it an outlet (4) for the second fraction. In order to prevent clogging, the circumferential wall of the screen (5) is made up of substantially parallel laminae (8, 9), secured one above the other at a distance from one another, the outer edges of the laminae (8) being oriented obliquely downward.

REFERENCES:
patent: 1185794 (1916-06-01), Haug
patent: 2913114 (1959-11-01), Plaven
patent: 3229815 (1966-01-01), Mathewson
patent: 3511374 (1970-05-01), Beal
patent: 4130478 (1978-12-01), Swallow
patent: 4383918 (1983-05-01), Chupka et al.
patent: 4430232 (1984-02-01), Doucet
patent: 4551242 (1985-11-01), Mroz et al.
patent: 4941970 (1990-07-01), hs

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