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
Grinder control functions Grinding must produce groundwood pulp that fulfils the quantity and quality requirements with the lowest specific energy consumption. To be able to control the grinding process successfully, the control task should include the choice of the right grinding criteria. A correct choice enables a grinding process which stabilises naturally, to produce the
Authors & references
Edited by:
Professor Emeritus Kauko Leiviskä, University of Oulu
Based on: Björkqvist, T. & Tuovinen, O., Grinding control (Chapter 7, Process control in mechanical pulping). In: Leiviskä, K. (ed), Process and Maintenance Management, (Book 14), Papermaking Science and Technology. 2nd edition. Jyväskylä, 2009, Paper Engineer’s Association/Paperi ja Puu Oy. pp. 177–188.
References:
- Zupan, R., Mitchell, G., Burkett, W. and Kevin, L. 1990. Pulp mill modernization/replacement at Blandin Company Grand Rapids, Minnesota, U.S.A. In: 44th Appita Annual General Conference. Rotorua, New Zeeland, April 2–6. pp.C26.1–C26.15.
- Roberts, C.B. and Chapman, R. 1995. Precise control of the sharpening burr. In: International Mechanical Pulping Conference. Ottawa, Canada, June 12–15. pp. 45–48.
- Manner, H., Reponen, P., Vahteri, R. and Karpanen, T.1995. Effect of water jet pulpstone conditioning on mechanical pulp and paper quality at Anjala paper mill. In:TAPPI 1995 International Mechanical Pulping Conference. TAPPI PRESS. p. 35.
- Puurunen, A., Blomqvist, S. and Ora, M. 1997. First mill scale experience of the Waterjet pulp stone conditioning system at UPM-Kymmene Voikkaa and Rauma mill. In: 1997 Pulping Conference. San Francisco, CA, October 19–23. pp. 317–322.
- Kärnä, A. and Liimatainen, H. 1998. Pat. FI 64666. Menetelmä hiomisprosessin säätämiseksi uunihiomakoneessa. Oy Tampella Ab, Finland. Appl. 813842.
- Haka-Risku, J. 1998. Batch control of pressure grinding (in Finnish). MSc. thesis. Tampere University of Technology. Automation and Control Institute. 97 p.
- Kärnä, A. and Liimatainen, H. 1985. Control of pressurised grinding. Initial experiences at Anjala. Pulp Paper Canada. Vol. 86, Issue 12, pp. T377–T383.
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This page has been updated 14.11.2020