D - Textiles – Paper – 21 – D
Patent
D - Textiles, Paper
21
D
209/116, 92/52
D21D 5/02 (2006.01) B01D 29/11 (2006.01)
Patent
CA 1330731
Abstract The invention relates to a method and a de- vice 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 consump- tion 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. (Fig. 2)
605992
Cassan Maclean
Valmet Corporation
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