D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
D21C 7/00 (2006.01) D21C 7/14 (2006.01)
Patent
CA 2537087
The invention relates to a central screen element being located substantially parallel with the vertical axis of a pulp digester. In the vertical direction, the screen element comprises at least one zone including one screen segment for removing a liquid stream from the digester and at least one outlet for introducing a liquid stream to the digester. The zones may be adjacent or separated and by means of these, liquid streams may be independently removed and introduced, as required by the properties and the stage of the cooking process. A screen element according to the invention may be used in both continuous and batch digesters.
L'invention concerne un élément de crible central situé de manière sensiblement parallèle à l'axe vertical d'un lessiveur de pulpe. Dans le sens vertical, l'élément de crible comprend au moins une zone présentant un segment de crible permettant d'éliminer un flux de liquide du lessiveur et au moins un orifice de sortie permettant d'introduire un flux de liquide dans le lessiveur. Les zones peuvent être adjacentes ou séparées et permettent d'éliminer et d'introduire, de manière indépendante, des flux de liquide, tel que requis par les propriétés et l'étape du procédé de cuisson. Un élément de crible selon l'invention peut être utilisé aussi bien dans les lessiveurs en continu qu'en discontinu.
Isola Antti
Rosenqvist Matti
Mcfadden Fincham
Metso Paper Inc.
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