Arrangement in connection with screening apparatuses

Details Arrangement in connection with screening apparatuses Arrangement in connection with screening apparatuses

D - Textiles, Paper

21

D

D21D 5/02 (2006.01) D21D 5/06 (2006.01)

Patent

CA 2643516

The present invention relates to an arrangement in screening apparatuses of the pulp and paper industry, said arrangement comprising a conduit (2) for removing reject formed in a screening process. It is essential that circulation of material is arranged between the reject removal conduit and the interior of the screening apparatus from the removal conduit into the interior of the screening apparatus via a conduit (5) external to the screening apparatus. When such a by-pass flow is arranged for pulp via external circulation, heavy particles in the layer being diluted are allowed to be separated onto the bottom of the reject removal conduit and therethrough e.g. into a separate junk trap (3) .

L'invention concerne un dispositif associé à un appareil de tamisage dans l'industrie de la pâte à papier et du papier, ledit dispositif comprenant un conduit (2) servant à évacuer les résidus issus d'un processus de tamisage. La pâte doit nécessairement circuler entre le conduit d'évacuation des résidus et l'intérieur de l'appareil de tamisage par le biais d'un autre conduit (5) externe à l'appareil de tamisage. Cette circulation externe en dérivation de la pâte donne lieu à une séparation des particules lourdes présentes dans la couche diluée qui se déposent au fond du conduit d'évacuation des résidus et sont acheminées, par exemple, vers un piège à débris (3) séparé.

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