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Feeding of double disc refiners - modeling of particle flow
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences. (FORIC)ORCID iD: 0000-0002-2066-5486
Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering. (FORIC)ORCID iD: 0000-0003-3381-5516
Valmet AB.
2018 (English)In: IMPC 2018, Trondheim, Norway, 2018Conference paper, Published paper (Refereed)
Abstract [en]

Improvements to the energy efficiency of double disk refiners are hampered by the feeding rate in tothe machine. This study aims to evaluate parameters towards a complete model, which will help tobring clarity to the limiting factors in feeding rate. A combined computational fluid dynamic anddiscrete element model is used to evaluate the flowrate of a hopper discharge unaided, and aided by agas flow with varying density. The results of the study shows that it is essential to capture the exactgeometry of the double disk feeding in relation to the woodchips in the complete model. The resultsalso shows that while it is essential to include the gas phase in the full model, the model is not sensitiveto small variance in the density of the gas.

Place, publisher, year, edition, pages
Trondheim, Norway, 2018.
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:miun:diva-34676OAI: oai:DiVA.org:miun-34676DiVA, id: diva2:1254426
Conference
International Mechanical Pulping Conference (IMPC) 2018, May 27-30, 2018, Trondheim, Norway
Available from: 2018-10-09 Created: 2018-10-09 Last updated: 2018-10-09Bibliographically approved

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Persson, JohanEngberg, Birgitta A.

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