Transition control in continuous digesters Wood species changes are common in the Nordic countries, although very little has been published concerning species change strategies. This text uses mainly one available publication 1. Opinions vary on how species changes should be managed, which has led to different species change strategies in different mills. The yield and
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Transition control in continuous digesters
After reading this article you will..
- learn the principles for species and production rate changes in continuous digesters.
Content
Process control and automation
- Introduction to process control and automation
- Development of process automation
- Fibre process automation
- Chemical recovery as a control object
- Advances in paper machine automation
- Paper machine as a dynamical system
- Tasks in paper machine control and management
- Control of stock flow concentration and quality
- Machine direction control
- Cross-directional control – The static optimisation
- Cross-directional control – Dynamics
- Cross-directional control – further aspects
- Controlling functional paper properties
- Managing grade chances in the paper machine
- Managing disturbances caused by broke and recovered solids
- Millwide systems
- Modelling and control methods
Authors & references
Authors:
Professor Emeritus Kauko Leiviskä, University of Oulu
References:
- Sutinen, R., Joensuu, I., Furst, P., Leiviskä, K. 1990. Advanced Kamyr digester control. In: 1990 EUCEPA Conference Proceedings. Stockholm, May 9–11. SPCI. pp. 253–264.
- Mori, Y., Sueda, R. and Takeuchi, S. 2003. Pulp cooking control and wood species change control for a Kamyr continuous digester. SICE Annual Conference, Fukui, Japan, August 4–6, 397–402.
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Exercises
This page has been updated 13.10.2020
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