A process for improving the drainage of cellulosic pulps

Details A process for improving the drainage of cellulosic pulps A process for improving the drainage of cellulosic pulps

D - Textiles, Paper

21

C

D21C 9/18 (2006.01) D21F 1/66 (2006.01) D21H 17/65 (2006.01) D21H 21/10 (2006.01)

Patent

CA 2307838

The invention relates to a process for improving the drainage or dewatering of cellulosic pulp suspensions in a paper making machine, a drying machine or the like assembly. The invention also relates to a process for producing a dried cellulosic product from said pulp suspension. The drainage of said pulp suspension is improved by treating it with carbon dioxide just prior to its entering a dewatering device such as the wire section of a paper machine.

La présente invention porte sur un procédé permettant d'améliorer le drainage ou l'égouttage des pulpes cellulosiques dans une machine à fabriquer du papier, une machine à sécher et autre installation du même type. Ladite invention porte également sur un procédé de fabrication d'un produit cellulosique séché à partir d'une suspension pulpaire. On améliore le drainage de cette suspension pulpaire en la traitant avec du dioxyde de carbone juste avant son entrée dans le dispositif d'égouttage, notamment sur le côté toile de la machine à faire le papier.

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