Multi-stage ap mechanical pulping with refiner blow line...

Details Multi-stage ap mechanical pulping with refiner blow line... Multi-stage ap mechanical pulping with refiner blow line...

D - Textiles, Paper

21

B

D21B 1/16 (2006.01) D21C 9/16 (2006.01)

Patent

CA 2533535

The invention combines the step of adding chemicals such as alkaline peroxide to an intermediate line after refining, with the step of applying chemicals such as alkaline peroxide as a pre-treatment before primary refining and/or applying chemicals such as alkaline peroxide at the primary refiner. This is implemented tin the preferred embodiment, by material, refining the material into a pulp in a superatmospheric refiner, and adding chemicals in the post refining blowline.

L'invention concerne un procédé consistant à ajouter des produits chimiques, tels que du peroxyde alcalin, dans une installation intermédiaire, après le raffinage, et à appliquer des produits chimiques, tels que du peroxyde alcalin, utilisés en tant que prétraitement, avant le raffinage primaire et/ou à appliquer des produits chimiques, tels que du peroxyde alcalin, au niveau du raffineur primaire. Un mode de réalisation préféré de la présente invention concerne le raffinage en pulpe de matériau dans un raffineur superatmosphérique, puis l'ajout de produits chimiques dans l'installation de soufflage utilisée après le raffinage.

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