Kuoren käsittely polttoaineeksi: PUUT07

Translated title of the contribution: Processing of bark into fuel

Risto Impola

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

The dry matter content of debarking waste from wood processing is typically low and particle size distribution is extensive. Debarking waste is also a difficult fuel to process. Nevertheless, bark is a significant source of domestic energy in the wood-processing industry. The aim of this study was to improve present methods and develop new mechanical and thermal bark processing methods, by which the fuel characteristics of bark are improved and waste water effluents from wood processing can be reduced. The work focused on experimental operations with existing bark shredders and presses. The sites of research were bark processing lines at five pulp mills and bark crushers at two sawmills. The present shredders disintegrate bark relatively well. Especially, softwood bark is totally crushed to < 60 mm, and 80-90% to < 30 mm. In shredding birch bark, the high wood content causes problems. In mechanical pressing of bark, the dry matter contents were as follows: 3.5-9.3 percentage units for pine, and 4.7-12.2 percentage units for spruce. The moisture content of softwood bark was still 50-65% after pressing. The dry matter content of birch bark grew only by 1-3.3 percentage units in pressing, primarily due to a low initial moisture content and wide particle size distribution.
Original languageFinnish
Title of host publicationPuuenergian teknologiaohjelman vuosikirja 2000
PublisherVTT Technical Research Centre of Finland
Pages217-232
ISBN (Electronic)951-38-5704-2
ISBN (Print)951-38-5703-4
Publication statusPublished - 2000
MoE publication typeA4 Article in a conference publication
EventPuuenergian teknologiaohjelman vuosiseminaari - Jyväskylä, Finland
Duration: 29 Aug 200030 Aug 2000

Publication series

SeriesVTT Symposium
Number205
ISSN0357-9387

Seminar

SeminarPuuenergian teknologiaohjelman vuosiseminaari
CountryFinland
CityJyväskylä
Period29/08/0030/08/00

Fingerprint

bark
wood processing
pressing
dry matter content
softwood
particle size distribution
Betula
crushers
shredding
water content
sawmills
processing technology
pulp
effluents
wastewater
Picea
Pinus
industry
heat
energy

Cite this

Impola, R. (2000). Kuoren käsittely polttoaineeksi: PUUT07. In Puuenergian teknologiaohjelman vuosikirja 2000 (pp. 217-232). VTT Technical Research Centre of Finland. VTT Symposium, No. 205
Impola, Risto. / Kuoren käsittely polttoaineeksi : PUUT07. Puuenergian teknologiaohjelman vuosikirja 2000. VTT Technical Research Centre of Finland, 2000. pp. 217-232 (VTT Symposium; No. 205).
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title = "Kuoren k{\"a}sittely polttoaineeksi: PUUT07",
abstract = "The dry matter content of debarking waste from wood processing is typically low and particle size distribution is extensive. Debarking waste is also a difficult fuel to process. Nevertheless, bark is a significant source of domestic energy in the wood-processing industry. The aim of this study was to improve present methods and develop new mechanical and thermal bark processing methods, by which the fuel characteristics of bark are improved and waste water effluents from wood processing can be reduced. The work focused on experimental operations with existing bark shredders and presses. The sites of research were bark processing lines at five pulp mills and bark crushers at two sawmills. The present shredders disintegrate bark relatively well. Especially, softwood bark is totally crushed to < 60 mm, and 80-90{\%} to < 30 mm. In shredding birch bark, the high wood content causes problems. In mechanical pressing of bark, the dry matter contents were as follows: 3.5-9.3 percentage units for pine, and 4.7-12.2 percentage units for spruce. The moisture content of softwood bark was still 50-65{\%} after pressing. The dry matter content of birch bark grew only by 1-3.3 percentage units in pressing, primarily due to a low initial moisture content and wide particle size distribution.",
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series = "VTT Symposium",
publisher = "VTT Technical Research Centre of Finland",
number = "205",
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Impola, R 2000, Kuoren käsittely polttoaineeksi: PUUT07. in Puuenergian teknologiaohjelman vuosikirja 2000. VTT Technical Research Centre of Finland, VTT Symposium, no. 205, pp. 217-232, Puuenergian teknologiaohjelman vuosiseminaari, Jyväskylä, Finland, 29/08/00.

Kuoren käsittely polttoaineeksi : PUUT07. / Impola, Risto.

Puuenergian teknologiaohjelman vuosikirja 2000. VTT Technical Research Centre of Finland, 2000. p. 217-232 (VTT Symposium; No. 205).

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

TY - GEN

T1 - Kuoren käsittely polttoaineeksi

T2 - PUUT07

AU - Impola, Risto

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N2 - The dry matter content of debarking waste from wood processing is typically low and particle size distribution is extensive. Debarking waste is also a difficult fuel to process. Nevertheless, bark is a significant source of domestic energy in the wood-processing industry. The aim of this study was to improve present methods and develop new mechanical and thermal bark processing methods, by which the fuel characteristics of bark are improved and waste water effluents from wood processing can be reduced. The work focused on experimental operations with existing bark shredders and presses. The sites of research were bark processing lines at five pulp mills and bark crushers at two sawmills. The present shredders disintegrate bark relatively well. Especially, softwood bark is totally crushed to < 60 mm, and 80-90% to < 30 mm. In shredding birch bark, the high wood content causes problems. In mechanical pressing of bark, the dry matter contents were as follows: 3.5-9.3 percentage units for pine, and 4.7-12.2 percentage units for spruce. The moisture content of softwood bark was still 50-65% after pressing. The dry matter content of birch bark grew only by 1-3.3 percentage units in pressing, primarily due to a low initial moisture content and wide particle size distribution.

AB - The dry matter content of debarking waste from wood processing is typically low and particle size distribution is extensive. Debarking waste is also a difficult fuel to process. Nevertheless, bark is a significant source of domestic energy in the wood-processing industry. The aim of this study was to improve present methods and develop new mechanical and thermal bark processing methods, by which the fuel characteristics of bark are improved and waste water effluents from wood processing can be reduced. The work focused on experimental operations with existing bark shredders and presses. The sites of research were bark processing lines at five pulp mills and bark crushers at two sawmills. The present shredders disintegrate bark relatively well. Especially, softwood bark is totally crushed to < 60 mm, and 80-90% to < 30 mm. In shredding birch bark, the high wood content causes problems. In mechanical pressing of bark, the dry matter contents were as follows: 3.5-9.3 percentage units for pine, and 4.7-12.2 percentage units for spruce. The moisture content of softwood bark was still 50-65% after pressing. The dry matter content of birch bark grew only by 1-3.3 percentage units in pressing, primarily due to a low initial moisture content and wide particle size distribution.

M3 - Conference article in proceedings

SN - 951-38-5703-4

T3 - VTT Symposium

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BT - Puuenergian teknologiaohjelman vuosikirja 2000

PB - VTT Technical Research Centre of Finland

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Impola R. Kuoren käsittely polttoaineeksi: PUUT07. In Puuenergian teknologiaohjelman vuosikirja 2000. VTT Technical Research Centre of Finland. 2000. p. 217-232. (VTT Symposium; No. 205).