D - Textiles – Paper – 21 – D
Patent
D - Textiles, Paper
21
D
D21D 5/20 (2006.01) D21D 5/02 (2006.01)
Patent
CA 2266359
A separation device for separating contaminants from fibre pulp suspensions, preferably produced from waste paper, comprises a cylindrical screen member (4) and a rotor (7) arranged therein. An annular inlet passage (14) for incoming suspension surrounds a tubular wall (11), which extends from the screen member (4) coaxially with the rotor (7). According to the invention, a flow deflecting wall member (16) extends towards the rotor (7) to a position in which the wall member is axially in front of an open end (12) of the tubular wall (11) and radially inside the tubular wall. Furthermore, the wall member (16) is arranged such that an annular flow passage (17) is formed between the tubular wall (11) and the wall member (16) with a cross-sectional area which is substantially less than the cross-sectional area of the annular inlet passage (14).
L'invention concerne un dispositif permettant de séparer des contaminants de pâtes constituées de fibres en suspension, de préférence provenant de papier usé. Ce dispositif comprend un élément tamis cylindrique (4) et un rotor (7) placé à l'intérieur. Un passage d'entrée annulaire (14) pour une suspension entrante entoure une paroi tubulaire (11) qui s'étend entre l'élément tamis (4) et coaxialement par rapport au rotor (7). Selon l'invention, une paroi (16) déflectice de flux s'étend vers le rotor (7), jusqu'à une position dans laquelle la paroi se trouve, axialement, en face d'un passage ouvert (12) de la paroi tubulaire (11) et, radialement, à l'intérieur de cette paroi tubulaire. En outre, la paroi (16) est disposée de manière à ce qu'un passage (17) à flux annulaire soit formé entre la paroi tubulaire (11) et la paroi (16), avec une surface de section transversale sensiblement inférieure à la surface de section transversale du passage d'entrée annulaire (14).
Borden Ladner Gervais Llp
Gl&v/celleco Ab
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