Device for screening and treating pulp

Details Device for screening and treating pulp Device for screening and treating pulp

1989-07-14

1991-09-24

Fisher, Richard V.

Classifying, separating, and assorting solids

Sifting

With liquid treatment

209306, 162 55, 162261, 162380, 210403, 210404, B07B 120

Patent

active

050511688

ABSTRACT:
The invention relates to a method and a device for screening and treating pulp. In the invention, the pulp is screened in a screen into an accepted fraction and a rejected fraction, the rejected fraction being treated after the screening by removing water from it. In order to reduce the energy consumption of the refining process, the rejected pulp fraction is screened by means of a means (13) rotating rapidly in a reject space (12) of a screen (1) in such a manner that the rapidly rotating means (13) effects a radial flow of the fine-grained material contained in the rejected fraction outwards through a perforated wall (14) surrounding the rotating means (13) into a space (15, 15a) from where the fine-grained material is discharged.

REFERENCES:
patent: 791566 (1905-06-01), Mayer
patent: 2983379 (1961-03-01), Cram
patent: 3672506 (1972-06-01), Syrjanen
patent: 3791917 (1974-02-01), Bolton, III
patent: 3997441 (1976-12-01), Pamplin, Jr.
patent: 4202759 (1980-05-01), Krolopp et al.
patent: 4911828 (1990-03-01), Musselmann et al.

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