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
Continuous flow digester control Continuous digesters have been computer-controlled since the early 1960s. Dedicated control packages have been commercially available since the 1970s. System platforms have changed with time, but the basic control functions have remained very similar. The control methods and software tools for maintaining upper level controls have developed considerably. Development of new
Authors & references
Authors:
Professor Emeritus Kauko Leiviskä, University of Oulu
References :
- Sutinen, R., Joensuu, I., Furst, P. and Leiviskä, K. 1990. Advanced Kamyr digester control. In: 1990 EUCEPA Conference Proceedings. Stockholm, May 9–11. SPCI:253–264.
- Rantanen, R. 2006. Modelling and control of cooking degree in conventional and modified continuous pulping processes. Acta Universitatis Ouluensis C 251. 140 p. ISBN 951–42–8149–7, [Online] Available from: http://herkules.oulu.fi/isbn9514281500/. [Accessed 6th March 2020].
- Laakso, S. 2007. Modelling of chip bed packing in a continuous Kraft cooking digester. TKK Reports in Forest Products Technology Series A6, Espoo. 142 p. ISBN 978–951–22–9677–4.
- Keinänen, P., Rinne, R., Poranen, T. 2002. New analysis methods for better digester management. African Pulp and Paper Week. Durban, South Africa, Oct. 8–11.
- Lindgren,T., Gustafsson, T., Forsgren, H., Johansson, D. and Östensson, J. 2005. Model predictive control of the chip level in a continuous pulp digester, a case study. Pulp & Paper Canada 106(11):46–51.
- Badwe, A. and Satini, R. 2016. Continuous digester optimization using advanced process control. Control Systems 2016, April 27–28, Stockholm, Sweden.
- Gilbert, W., Trush, I., Allison, B., Reimer, R. and Mason, H. 2017. Dry chip feed rate control using online chip moisture. TAPPI PEERS, Norfolk, Virginia.
- Modén, P.E. and Lundh, M. 2013. Performance Monitoring for Model Predictive Control Maintenance. 2013 European Control Conference (ECC), July 17–19, Zürich, Switzerland.
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This page has been updated 14.11.2020