Brown stock washing control The washing plant has a dual function in the pulp mill. It cleans the pulp to remove used chemicals and other unwanted reaction products that could increase the chemical consumption or harm the environment in the subsequent process stages, i.e. it must minimise the washing loss. It is also the first
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Brown stock washing control
After reading this article you will..
- learn the dual targets of the pulp washing process.
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:
- Lundqvist, S. O. 1985. Pulp washing control: principles and results. Pulp Paper Canada 86(11):72–76.
- Brown, M.T. and Hart, B.W. 2017. Understanding conductivity and soda loss. Tappi J. 16(2):65-75.
- Andersson, N., Wilke, C., Biazzo, T. Van Fleet, R. and Germgård, U. 2014. A new sensor and a novel control concept for optimized fiber line operation. TAPPI J. 13(10):39-45.
- Kopra, R., Koivula, K. and Dahl, O. 2015. Optimization of a brownstock washing line. Tappi J. 14(2):83-91.
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This page has been updated 14.11.2020
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