TMP properties and refiner conditions in a CD82 chip refiner at different operation points. Part II: Comparison of the five tests

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Ferritsius, RitaMittuniversitetet,Avdelningen för kemiteknik,StoraEnso Kvarnsveden, Borlänge (author)

TMP properties and refiner conditions in a CD82 chip refiner at different operation points. Part II: Comparison of the five tests

Article/chapterEnglish2018

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2018-05-23
Walter de Gruyter GmbH,2018

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LIBRIS-ID:oai:research.chalmers.se:aadc6d75-965c-48ad-bb12-66645bc09172
https://research.chalmers.se/publication/506760URI
https://doi.org/10.1515/npprj-2018-3003DOI
https://research.chalmers.se/publication/506770URI
https://research.chalmers.se/publication/504026URI
https://research.chalmers.se/publication/506764URI
https://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-34543URI

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Language:English
Summary in:English

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SwePubSwePub

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Subject category:art swepub-publicationtype
Subject category:ref swepub-contenttype

Notes

This paper is part two of a study on a CD 82 TMP chip refiner where relations between changes in the process conditions and changes in the properties of the produced pulp are investigated. Focus is on the ratio between tensile index and specific energy consumption when results from five tests are compared. Pulp properties were measured for composite pulp samples taken from the refiner blow line. Residence times and pulp consistencies were estimated by use of the extended entropy model. Clearly, an increase in specific energy does not necessarily implicate an increase in strength properties of the pulp produced. It is of high importance to have access to information about the refining zone conditions when searching for an optimal operation point in terms of the ratio between tensile index and specific energy. In these tests, this ratio had a maximum at about 55 % measured blow line consistency. Unfavourable operating conditions were identified at high pulp consistencies, especially after the FZ, where pulp consistencies well above 70 % were observed. The estimated residence time for each refining zone responded differently when applying changes in production rate, plate gaps and dilution water flow rates. In conclusion, the results associated with estimated pulp consistencies where easier to interpret compared with results for residence times, implying that additional tests are required for the latter variable. In addition to tensile index, pulp properties like freeness, Somerville shives and light scattering coefficient were included in the analysis.

Subject headings and genre

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 Kemiteknik Annan kemiteknik hsv//swe
ENGINEERING AND TECHNOLOGY Chemical Engineering Other Chemical Engineering hsv//eng
NATURVETENSKAP Matematik Sannolikhetsteori och statistik hsv//swe
NATURAL SCIENCES Mathematics Probability Theory and Statistics hsv//eng
TEKNIK OCH TEKNOLOGIER Kemiteknik hsv//swe
ENGINEERING AND TECHNOLOGY Chemical Engineering hsv//eng
residence time
pulp quality
temperature measurements
handsheet properties
entropy model
plate gap
TMP refiners
fibre properties
specific energy
CD 82 refiner

Added entries (persons, corporate bodies, meetings, titles ...)

Ferritsius, OlofMittuniversitetet,Avdelningen för kemiteknik(Swepub:miun)olofer (author)
Hill, J.QualTech AB, Tyringe (author)
Karlström, Anders,1958Chalmers tekniska högskola,Chalmers University of Technology,Chalmers University of Technology, Gothenburg(Swepub:cth)anderska (author)
Eriksson, K.CIT Industriell Energi, Gothenburg (author)
MittuniversitetetAvdelningen för kemiteknik (creator_code:org_t)

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In:Nordic Pulp and Paper Research Journal: Walter de Gruyter GmbH33:1, s. 82-942000-06690283-2631

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By the author/editor: Ferritsius, Rita; Ferritsius, Olof; Hill, J.; Karlström, Ander ...; Eriksson, K.

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ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...; and Paper Pulp and F ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Chemical Enginee ...; and Other Chemical E ...

NATURAL SCIENCES: NATURAL SCIENCES; and Mathematics; and Probability Theo ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Chemical Enginee ...

Articles in the publication: Nordic Pulp and ...

By the university: Chalmers University of Technology; Mid Sweden University

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