Causticising – Control functions

Causticising – Control functions Figure 1 shows the control hierarchy of the causticising controls in the computerised control system. The green liquor flow from the dissolving tank determines the production rate of the causticising plant. It must balance with the production requirements of the entire mill. The total alkali content of green liquor is

To access this post, you must purchase All themes or Process control and automation. Do you already have a membership or are you part of an organization? log in

Authors & references

Edited by:

Professor Emeritus Kauko Leiviskä, University of Oulu

Based on: Leiviskä, K., Process control in chemical recovery (Chapter 6). 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. 131–164.

References:

Elsilä, M., Leiviskä, K., Nettamo, K. and T. Pulkkinen. 1979. Computer control of causticization and lime kiln area is possible. Pulp Paper 53(12):152–155, 159.
Leiviskä, K., Savukoski, M. and Uronen, P. 1987. Causticizing reaction and methods to analyze its proceeding. Report 105. Department of Process Engineering, University of Oulu, Oulu.
Bailey, R. B. and Willison, T. R. 1985. Mill experiences with computerised kiln control and optimisation. TAPPI J. 69(6):62–64.
Bertelsen, P. 1986. Experiences in causticizing control with Kemotron CCS 2400. In: 1986 Causticizing–Lime Kiln Symposium. SPCI-meddelande 53, Stockholm. 54–61. (In Swedish).
Lounasvuori, R., Sutinen, R., Juuma, M., et al., Successful experiences of liquor circulation computer control in Scandinavia. In: Proceedings of 1985 International Chemical Recovery Conference. New Orleans, April 28–May 1. 419.
Hultman, B. and Berglund, A. 1981. A sensor based causticizing control system. In: CPPA/TAPPI International Conference on Recovery of Pulping Chemicals. Vancouver, September 22–25. 95–98.
Rasmusson, L. 1986. Determinex DL1000 controls causticizing. In: 1986 Causticizing–Lime Kiln Symposium. SPCI-meddelande 53, Stockholm. 67–79. (In Swedish).
Swanda, P., Seborg, D.E., Holman, K.L. and Sweerus, N.G. 2000. Performance evaluation of two simple causticizing control systems. TAPPI J. 83(4):73–74.
Tolonen, J., Tolonen, O. and Puhakka, J. 2002. Optimisation of the causticizing process. TAPPSA J. July 2002, 25–29.
Williamson, M. 2019. Navigator Cacia Optimizes Causticizing Process Targets. Paper360˚, March/April 2019, 40-41.
De Andrade, A.A., Vieira, O., Hallak D’angelo, J.V. and Freitas, M. 2010. Advanced control implementation in the causticizing process of a pulp mill. Control Systems 2010 Conference.
Trung, T. and Allison, B. 2015. Advanced online process analyzer for chemical recovery and pulp mill control. O Papel 76(1):47 – 56.
Allison, B. 2011. Kinetic Model-Based State Estimation and Inferential Control of the Causticizing Process. Tappi PEERS Conference, Portland OR, USA.

This page has been updated 15.11.2020

Causticising – Control functions

After reading this article you will..

Process control and automation

Authors & references

Videos

Exercises