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The effect of proce...
The effect of process design on refiner pulp quality control performance
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- Sund, Johan (författare)
- Mittuniversitetet,Institutionen för kemiteknik,Holmen paper,Mid Sweden University
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- Sandberg, Christer, 1962- (författare)
- Mittuniversitetet,Institutionen för kemiteknik,Holmen paper,Mid Sweden University
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- Karlström, Anders, 1958 (författare)
- Chalmers,Chalmers tekniska högskola,Chalmers University of Technology
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- Thungström, Göran, 1960- (författare)
- Mittuniversitetet,Institutionen för elektronikkonstruktion,Mid Sweden University
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- Engstrand, Per, Professor, 1955- (författare)
- Mittuniversitetet,Institutionen för kemiteknik,Mid Sweden University
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(creator_code:org_t)
- 2021-10-02
- 2021
- Engelska.
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Ingår i: Nordic Pulp & Paper Research Journal. - : Walter de Gruyter GmbH. - 0283-2631 .- 2000-0669. ; 36:4, s. 594-607
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Abstract
Ämnesord
Stäng
- In this study, the effect of process- and online analyser configuration on pulp quality control is explored. The following parameters were included: analyser sampling interval, time delay, measurement error magnitude, and latency chest residence time. Using different values of parameters in a process model, a range of configurations were constructed. For each configuration, the achievable control performance was evaluated using an optimization approach. PI controller settings were chosen based on minimization of the integrated absolute error (IAE) in pulp quality after an input step disturbance. The results show that reducing the sampling interval improves performance also when the interval is smaller than the chest residence time or the analyser delay. Moreover, reducing the chest residence time can reduce the IAE by up to 40 %. However, reducing the residence time to lower than 1/3 of the sampling interval does not improve performance. Further improvement is possible if the analyser delay is reduced. The compromise between reducing the IAE and avoiding creating variation by acting on measurement error has a strong influence on the results. In conclusion, pulp quality control performance can be improved significantly by making changes to the studied configuration parameters.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Pappers-, massa- och fiberteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Paper, Pulp and Fiber Technology (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Reglerteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Control Engineering (hsv//eng)
Nyckelord
- latency chest
- measurement error
- mechanical pulp
- optimization
- sampling rate
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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