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The impact of using different wood qualities and wood species on chips produced using a novel type of pilot drum chipper

Timmerfors, Jessica Gard and Salehi Kahrizsangi, Hamid and Larsson, Sylvia and Sjölund, Torbjörn and Jonsson, Leif J. (2021). The impact of using different wood qualities and wood species on chips produced using a novel type of pilot drum chipper. Nordic Pulp and Paper Research Journal. 36 , 214-226
[Research article]

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Abstract

Resource-efficient wood chipping for forest-industrial processes demands large fractions of accept chips and small fractions of small-sized material, such as pin chips and fines. In Kraft pulping, a narrow distribution of wood chip thickness is important for even impregnation and for making high-quality pulp. Using newly developed forest-industrial drum-chipping technology, the investigation covered wood of varying moisture content, frozen versus unfrozen wood, and the use of different wood species. Using conventional techniques for analyzing wood chip dimensions, fast-grown spruce wood with high moisture content gave 4.2% pin chips and fines, which was less than half of the fractions obtained with spruce wood with lower moisture content. A comparison between frozen and unfrozen pine resulted in slightly thinner and shorter chips for the frozen wood, but in both cases accept yields of up to similar to 85% were achieved. A comparison of different tree species (aspen, birch, pine, and spruce) resulted in larger accept fractions (similar to 90%) for the hardwood species, even though the average length of these wood chips was as low as 17 mm. The results provide a first indication of how basic wood log properties affect the yields of accept chips and small-sized material when using modern industrial drum-chipping technology.

Authors/Creators:Timmerfors, Jessica Gard and Salehi Kahrizsangi, Hamid and Larsson, Sylvia and Sjölund, Torbjörn and Jonsson, Leif J.
Title:The impact of using different wood qualities and wood species on chips produced using a novel type of pilot drum chipper
Series Name/Journal:Nordic Pulp and Paper Research Journal
Year of publishing :2021
Volume:36
Page range:214-226
Number of Pages:13
Publisher:WALTER DE GRUYTER GMBH
ISSN:0283-2631
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Wood Science
Keywords:drum chipper, frozen wood, moisture content, tree species, wood chips
URN:NBN:urn:nbn:se:slu:epsilon-p-112786
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-112786
Additional ID:
Type of IDID
DOI10.1515/npprj-2019-0096
Web of Science (WoS)000663328700002
ID Code:24862
Faculty:S - Faculty of Forest Sciences
Department:(S) > Department of Forest Biomaterials and Technology
Deposited By: SLUpub Connector
Deposited On:14 Jul 2021 13:25
Metadata Last Modified:14 Jul 2021 13:31

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