Method for use in the wet end of a paper machine, cardboard...

D - Textiles – Paper – 21 – F

Patent

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Details

D21F 1/00 (2006.01) D21F 1/02 (2006.01) D21F 3/00 (2006.01) D21F 7/00 (2006.01) D21F 9/00 (2006.01)

Patent

CA 2624747

The invention relates to a method in the wet end of a web forming process. In the method, at least one electrode pair (102, 103) is placed in the wet end. The electrode pair (102, 103) is supplied with a current/voltage from a power source (100), so that an electric field is set up between the electrode pair (102, 103), causing the material particles in the pulp suspension in the wet end to be electrically charged in a desired manner and to move in a desired manner in the pulp suspension in the wet end. The current/voltage of the power source (100) is controlled by means of a measuring and control unit (101) so as to cause the material particles in the pulp suspension to be electrically charged and to move in a desired manner, thus allowing the retention, formation and orientation of the material particles in the pulp suspension to be substantially improved.

L'invention concerne un procédé intervenant dans la partie humide d'un processus de formation de bande. Dans ledit procédé, au moins une paire d'électrodes (102, 103) est placée dans la partie humide. La paire d'électrodes (102, 103) est alimentée en courant / en tension à partir d'une source d'énergie (100), de sorte qu'un champ électrique est créé entre les électrodes (102, 103) de la paire, amenant les particules de matériau dans la suspension de pâte de la partie humide à se charger électriquement d'une manière souhaitée et à se déplacer d'une manière souhaitée dans la suspension de pâte de la partie humide. Le courant / la tension de la source d'énergie (100) est régulé(e) au moyen d'une unité de mesure et de régulation (101) de façon à amener les particules de matériau dans la suspension de pâte à se charger électriquement et à se déplacer d'une manière souhaitée, permettant ainsi d'améliorer sensiblement la rétention, la formation et l'orientation des particules de matériau dans la suspension de pâte.

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