Prediction and Control of Blow-line Kappa Number
| Authors: | Rantanen Rami, University of Oulu, Finland
Ahvenlampi Timo, University of Oulu, Finland
Tervaskanto Manne, University of Oulu, Finland
Kortela Urpo, University of Oulu, Finland
Korhonen Aki, Metso Automation Oy, Finland |
|---|
| Topic: | 6.1 Chemical Process Control |
|---|
| Session: | Advances in Automation in Pulp Industry |
|---|
| Keywords: | pulp industry, predictive control, temperature control, product quality |
|---|
Abstract
Two industrial continuous cooking processes producing both softwood and hardwood pulp were studied. Real time kappa number profiles of conventional and Downflow Lo-Solids cooking were modelled. Gustafson's kappa number model with optimised parameters was used. Blow-line kappa numbers were successfully predicted before cooking zone. New kappa number control strategy is presented. In control strategy, temperature set point is determined iteratively using prediction model of kappa number.
