CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

Modeling approaches for critical process limitations in the operation of thermomechanical pulp refiners

Karin Eriksson (Institutionen för signaler och system, Reglerteknik) ; Anders Karlström (Institutionen för signaler och system, Reglerteknik)
Nordic Pulp and Paper Research Journal (0283-2631). Vol. 24 (2009), 2, p. 231-238.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Refining models, Control, Process limitations, Plate clash, Fibre concentration



Denna post skapades 2009-09-03. Senast ändrad 2016-09-14.
CPL Pubid: 97252

 

Läs direkt!


Länk till annan sajt (kan kräva inloggning)