Method and apparatus for washing fibre pulp mixture

Details Method and apparatus for washing fibre pulp mixture Method and apparatus for washing fibre pulp mixture

D - Textiles, Paper

21

C

D21C 9/06 (2006.01) D21C 9/18 (2006.01) D21D 1/40 (2006.01) D21F 1/80 (2006.01)

Patent

CA 2343957

A method and an apparatus for washing a fibre pulp mixture, whereby water and, with it, ash and other particle-type impurities are removed from the fibre pulp mixture. In the method, the fibre pulp being washed is fed between two wires so that water and ash are removed from the fibre pulp through both wires, after which the wires and the fibre pulp between them are led to run along a curved surface to remove any extra water by means of the press of the wires and the centrifugal force. The apparatus has two wires (1, 2) and a dewatering section between the wires (1, 2) and water and impurities are removed in the dewatering section (3) through both wires (1, 2).

La présente invention concerne un procédé et un appareil de lavage d'un mélange de pâte à fibres permettant d'en éliminer l'eau entraînant avec elle les cendres et autres impuretés particulaires. En l'occurrence, on introduit entre deux toiles métalliques la pâte à fibres à laver de façon à faire passer par les deux toiles métalliques l'eau et les cendres à éliminer de la pâte à fibres. On fait alors défiler les toiles métalliques et la pâte à fibres sur une surface incurvée de façon à retirer tout supplément d'eau sous l'effet de la pression des toiles métalliques et de la force centrifuge. L'appareil comporte deux toiles métalliques (1, 2) et un poste d'essorage entre les deux toiles métalliques (1, 2), l'eau et les impuretés étant éliminées dans le poste d'essorage au travers des deux toiles (1, 2).

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