HOW TO PREVENT FIBER CUTTING AND PLATE CLASH IN TMP REFINERS
Two independent models for describing critical limitations in the operation of wood-chip disc refiners are presented and compared. One model has been derived using force distributions of the axial thrust and the steam pressure inside the refining zone. The other model is based on an extended entropy model, where physical variables like dynamic viscosity and fiber concentration along the radius in the refiner are central. The results suggest that both models are suitable for implementation in process computers for on-line limit protection. Both models predict non-linear dynamic process behavior in operating regions with impending risk of plate clash. In addition, results obtained using the entropy model demonstrate the importance of including design related information when modeling the conditions inside the refining zone.
Karin Eriksson Anders Karlstr(o)m
Chalmers Industrial Technology Foundation,Chalmers Science Park,SE-412 88 G(o)eborg, Sweden
国际会议
International Mechanical Pulping Conference 2011(2011国际机械浆学术会议)
西安
英文
108-111
2011-06-26（万方平台首次上网日期，不代表论文的发表时间）