Process and device for removing water from a mechanical...

Details Process and device for removing water from a mechanical... Process and device for removing water from a mechanical...

D - Textiles, Paper

21

F

D21F 1/52 (2006.01) D21F 1/48 (2006.01) D21F 9/00 (2006.01) F26B 13/30 (2006.01)

Patent

CA 2373644

The invention refers to a process for removing water from a mechanical pulp, chemical pulp or paper sheet 2, with dewatering taking place in a first zone 13, where the mechanical pulp, chemical pulp or paper sheet 2 runs, for example, between two wires 1, 3 in a dewatering machine 10 and is dewatered advantageously in a wedge zone 13, i.e. a sector in which the two wires 1, 3 converge in a wedge shape. It is mainly characterised by-the water at the end of the first dewatering zone 13 or adjoining it being removed from at least one wire 1, 3 by a vacuum, where the water is directed to the inner chamber 4 of a suction box 5 by the air current generated in the wire 1, 3. The invention also refers to a device for implementing the process.

L'invention concerne un processus pour l'essorage d'une pâte mécanique, d'une pâte chimique ou de papier en feuille 2, , l'essorage ayant lieu dans une première zone 13, la pâte mécanique, la pâte chimique ou de papier en feuille 2 se déplaçant, par exemple, entre deux toiles 1, 3 dans une machine d'essorage 10 et étant essorée avantageusement dans une zone de coin 13, c'est-à-dire une section dans laquelle les deux toiles 1, 3 convergent en forme de coin. Le procédé est principalement caractérisé en ce que l'eau au niveau de l'extrémité de la première zone d'essorage 13 ou une zone adjacente est essorée d'au moins une toîle 1, 3 par un vide, l'eau étant dirigée vers la chambre intérieure 4 d'une boîte d'aspiration 5 par le courant d'air généré dans la toile 1, 3. L'invention concerne également un dispositif pour la mise en oeuvre de ce procédé.

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