Causticising control White liquor is the main product of the causticising plant. Green liquor originates from the dissolving tank where smelt coming from the recovery boiler dissolves into weak wash. Green liquor includes sodium carbonate, sodium sulphite, sodium sulphate and some non-dissolving material like ash, silicates, metal oxides and different impurities. Green liquor goes first
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Causticising control
After reading this article you will..
- learn the basic processes and reactions of the causticising plant.
- learn the requirements for control in causticising.
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:
- 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.
- 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.
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This page has been updated 15.11.2020
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