On the modeling of pulp properties in CTMP processes

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Fältnamn	Indikatorer	Metadata
000		03665naa a2200445 4500
001		oai:research.chalmers.se:b972f58c-7449-4663-add1-1d4813d9c026
003		SwePub
008		210414s2021 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://doi.org/10.1515/npprj-2020-00842 DOI
024	7	a https://research.chalmers.se/publication/5232272 URI
040		a (SwePub)cth
041		a engb eng
042		9 SwePub
072	7	a art2 swepub-publicationtype
072	7	a ref2 swepub-contenttype
100	1	a Bengtsson, Fredrik,d 1989u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)fredben
245	1 0	a On the modeling of pulp properties in CTMP processes
264		c 2021-02-26
264	1	b Walter de Gruyter GmbH,c 2021
338		a electronic2 rdacarrier
520		a The goal of this paper is to model the pulp properties fiber length, shives width and freeness. This will be done utilizing specific energy, flat zone inlet consistency and the internal variables, consistencies and fiber residence times estimated from refining zone soft sensors. The models are designed using more than 3600 hours of data from a RGP82CD refiner. The pulp properties are sampled using a measurement device positioned after the latency chest. Such measurements are noisy and irregularly sampled which opens for a number of challenges to overcome in modeling procedures. In this paper it is shown that the models for shives width and fiber length are capable of predicting most of the major dynamics. However, for freeness no reliable linear models can be derived. When estimating fiber length, the specific energy together with flat zone inlet consistency, fiber residence times and the consistency in the conical zone were the dominant inputs. For shives width it was found that a similar set of inputs resulted in the best models, except that the consistencies during normal process conditions did not significantly influence shives width. Furthermore, fiber residence times were shown to have considerably more pronounced impact on fiber length compared with shives width estimates.
650	7	a TEKNIK OCH TEKNOLOGIERx Maskinteknikx Teknisk mekanik0 (SwePub)203012 hsv//swe
650	7	a ENGINEERING AND TECHNOLOGYx Mechanical Engineeringx Applied Mechanics0 (SwePub)203012 hsv//eng
650	7	a NATURVETENSKAPx Matematikx Sannolikhetsteori och statistik0 (SwePub)101062 hsv//swe
650	7	a NATURAL SCIENCESx Mathematicsx Probability Theory and Statistics0 (SwePub)101062 hsv//eng
650	7	a TEKNIK OCH TEKNOLOGIERx Elektroteknik och elektronikx Reglerteknik0 (SwePub)202022 hsv//swe
650	7	a ENGINEERING AND TECHNOLOGYx Electrical Engineering, Electronic Engineering, Information Engineeringx Control Engineering0 (SwePub)202022 hsv//eng
653		a Shives
653		a Pulp properties
653		a CTMP
653		a Linear modelling
653		a Fiber length
700	1	a Karlström, Anders,d 1958u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)anderska
700	1	a Wik, Torsten,d 1968u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)tw
710	2	a Chalmers tekniska högskola4 org
773	0	t Nordic Pulp and Paper Research Journald : Walter de Gruyter GmbHg 36:2, s. 234-248q 36:2<234-248x 2000-0669x 0283-2631
856	4	u https://research.chalmers.se/publication/523227/file/523227_Fulltext.pdfx primaryx freey FULLTEXT
856	4	u https://www.degruyter.com/document/doi/10.1515/npprj-2020-0084/pdf
856	4 8	u https://doi.org/10.1515/npprj-2020-0084
856	4 8	u https://research.chalmers.se/publication/523227

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