SAETT VID RENING AV EN FIBERSUSPENSION

摘要

Process and apparatus are provided for cleaning chemical 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.