D - Textiles – Paper – 21 – D
Patent
D - Textiles, Paper
21
D
D21D 5/00 (2006.01) D21D 5/02 (2006.01)
Patent
CA 2440185
The invention relates to a method of controlling quality of pulp. Pulp formed in mechanical defibering of wood is screened into at least two fractions, the accept that has passed the screening phase being forwarded for further use and the reject that did not pass the screening being removed from the screening phase. The invention comprises determining flow amount and consistency of the pulp supplied to the screening phase and, correspondingly, of the reject removed therefrom, and calculating a passage ratio of the reject and the supplied pulp by means of the flow amounts and consistency values verified through the measurement, and adjusting the screening phase according to said passage ratio.
L'invention concerne un procédé permettant de contrôler une qualité de pulpe. Ladite pulpe formée par défibrage mécanique du bois est séparée par tamisage en au moins deux fractions, la fraction acceptée en phase de tamisage étant utilisée ultérieurement et la fraction rejetée étant éliminée de ladite phase de tamisage. L'invention consiste à déterminer la quantité de la pulpe fournie en phase de tamisage et sa consistance et la quantité de pulpe rejetée, à calculer le taux de passage de la pulpe fournie et rejetée à l'aide de valeurs de quantité d'écoulement et de consistance vérifiées à l'aide de mesures, et à régler la phase de tamisage en fonction dudit taux de passage.
Aemmaelae Ari
Jussila Tero
Niinimaeki Jouko
Metso Paper Inc.
Ridout & Maybee Llp
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