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A METHOD OF TREATING AND A DISPERGER FOR DISINTEGRATING WOOD PULP, ESPECIALLY CONTAINING WASTE PAPER
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Title:
A METHOD OF TREATING AND A DISPERGER FOR DISINTEGRATING WOOD PULP, ESPECIALLY CONTAINING WASTE PAPER
Author:
KURTZ, RUDOLF
Subjects:
FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
;
PAPER-MAKING
;
PRODUCTION OF CELLULOSE
;
TEXTILES
;
TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKINGMACHINE
Description:
In a method of treating wood-fibre pulp, particularly pulp which contains recycled paper, the pulp is dewatered and then heated by means of superheated steam under pressure prior to being passed to a disperser (10), in which the pulp is finely divided. The pulp is passed from the disperser to a plug-outfeed screw (20) withouth separate departure of steam from the system. One end of the screw is closed by means of a valve device (21), so that the pulp carried by the screw will be compacted to form a plug which seals the system. The valve device (21) located at one end of the screw (20) is constructed to open when the pressure exerted thereon by the plug exceeds a pre-determined value. The invention also relates to a disperser (10) having a substantially rectangular outlet which is connected to a plug-screw (20) of the above kind. Dans le procédé décrit, qui sert à traiter de la pulpe de fibres de bois, notamment de la pulpe qui contient du papier recyclé, la pulpe est égoutée et ensuite chauffée au moyen de vapeur surchauffée sous pression avant de passser dans un appareil à disperger (10), dans lequel la pulpe est pulvérisée. La pulpe est amenée à passer de l'appareil à disperger dans une tresse à vis à avance vers l'extrémité de sortie formant bouchon (20), sans sortie séparée de vapeur du système. L'une des exrémités de la vis est fermée au moyen d'un clapet (21), de sorte que la pulpe acheminée par la vis est comprimée pour former un bouchon qui scelle le système. Le clapet (21) disposé à l'une des extrémités de la vis (20) est destiné à s'ouvrir lorsque la pression exercée sur lui par le bouchon dépasse une valeur prédéterminée. La présente invention se rapporte également à un appareil à disperger (10) comportant une sortie sensiblement rectangulaire reliée à une vis à bouchon (20) du type mentionné.
Creation Date:
1990
Language:
English;Swedish
Source:
esp@cenet
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