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TMP properties and ...
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, Rita (författare)
- Mittuniversitetet,Avdelningen för kemiteknik,StoraEnso Kvarnsveden, Borlänge
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- Ferritsius, Olof (författare)
- Mittuniversitetet,Avdelningen för kemiteknik
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- Hill, J. (författare)
- QualTech AB, Tyringe
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- Karlström, Anders, 1958 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers University of Technology, Gothenburg
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- Eriksson, K. (författare)
- CIT Industriell Energi, Gothenburg
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(creator_code:org_t)
- 2018-05-23
- 2018
- Engelska.
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Ingår i: Nordic Pulp and Paper Research Journal. - : Walter de Gruyter GmbH. - 2000-0669 .- 0283-2631. ; 33:1, s. 82-94
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- 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)
Nyckelord
- residence time
- pulp quality
- temperature measurements
- handsheet properties
- entropy model
- plate gap
- TMP refiners
- fibre properties
- specific energy
- CD 82 refiner
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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