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Model predictive control of the chip level in a continuous pulp digester
Luleå tekniska universitet.
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.ORCID iD: 0000-0002-0079-9049
Eurocon AB, Örnsköldsvik.
Luleå tekniska universitet.
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2004 (English)In: Control Systems 2004 Conference: preprints, Pulp and Paper Tech. Assoc. of Canada , 2004, p. 5-11Conference paper, Published paper (Refereed)
Abstract [en]

This paper describes the implementation of a digester chip level control system at the M-real Husum mill and an analysis of the chip level control problem. The kappa number variability is strongly related to variability in chip transport conditions which is related to the variations in chip retention time, caused by fluctuations in chip packing, blow line consistency, etc. It is important for a uniform pulp quality to have a stable movement of the chip column and stable properties in digester bottom. The objective with implemented chip level control system is to stabilize the transport conditions in the bottom of the digester by using the chip feed and not the blow flow (original control system) as the primary manipulated variable. The results indicate a smoother digester operation and a reduction of kappa number variations. The level control strategy is implemented both as a MPC controller scheme on a stand alone PC and as a conventional PID-solution in the DCS system

Place, publisher, year, edition, pages
Pulp and Paper Tech. Assoc. of Canada , 2004. p. 5-11
National Category
Control Engineering
Research subject
Control Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-32589Local ID: 7213b190-7bb2-11db-8824-000ea68e967bOAI: oai:DiVA.org:ltu-32589DiVA, id: diva2:1005823
Conference
Control Systems 2004 Conference : 14/06/2004 - 18/06/2004
Note
Godkänd; 2004; 20060925 (ysko)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved

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Gustafsson, Thomas

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Citation style
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