Process and apparatus for cleaning chemical cellulose pulp...

Details Process and apparatus for cleaning chemical cellulose pulp... Process and apparatus for cleaning chemical cellulose pulp...

D - Textiles, Paper

21

D

92/34

D21D 5/00 (2006.01)

Patent

CA 1230768

PROCESS AND APPARATUS FOR CLEANING CHEMICAL CELLULOSE PULP BY SCREENING Abstract A process and apparatus are provided for cleaning chemical type pulp by screening, in which the rejects from a first screening stage are rescreened in a second screening stage; the accepts from the second screening stage are separated in a hydrocyclone, and the clean fraction recycled to the first screening stage; the rejects from the second screening stage are beaten in a refiner and screened before or after the refiner; the suspension from the refiner is taken to the screen before the refiner, and the rejects from the screen after the refiner are recycled to the refiner.

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