An experimental study of the chipping process with focus on energy consumption and chipping angles
-
Jonas L. Nyström
,
Per A. Gradin
Abstract
A series of chipping experiments were performed under both dynamic and quasi-static conditions in a laboratory wood chipper (dynamic) and in a MTS-servohydraulic testing machine (quasi-static). One aim with the experiments was to investigate the rate dependency of the energy consumption during chipping. Another aim was to try to determine the load per unit knife edge length required to initiate cutting. The experiments were carried out using different combinations of spout and edge angles. It was found that for large edge angles (keeping the spout angle constant at
Acknowledgments
Staffan Nyström at Mid Sweden University’s mechanical testing laboratory is greatly acknowledged for performing the chipping trials.
Conflict of interest: There are no conflicts of interest.
References
Gradin, P. A., Nyström, S., Flink, P., Forsberg, S., Stollmaier, F. J. (1997) Acoustic Emission Monitoring of Light Weight Coated Paper. J. Pulp Pap. Sci. 23:3.Suche in Google Scholar
Hellström, L. M., Gradin, P. A., Engstrand, P., Gregersen, Ø. (2011a) Properties of wood chips for thermomechanical pulp (TMP) production as function of spout angle. Holzforschung 65:805–809.10.1515/HF.2011.087Suche in Google Scholar
Hellström, L. M., Gradin, P. A., Gulliksson, M., Carlberg, T. (2011b) A Laboratory Wood Chipper for Chipping Under Realistic Conditions. Exp. Mech. 51:1309–1316.10.1007/s11340-010-9452-1Suche in Google Scholar
Hellström, L. M., Carlberg, T., Engstrand, P., Gradin, P. A. (2012) Evaluation of Collimated Chipping Technology for Energy Consumption in Mechanical Pulping. J-FOR 2(3):6–9.Suche in Google Scholar
© 2018 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Editorials
- Farewell and good luck to Nordic Pulp & Paper Research Journal
- Change of Editor-in-Chief
- Biorefinery
- Kinetic study on the decomposition of cellulose into 5-hydroxymethylfurfural in an ionic liquid/organic biphasic system
- Antibacterial evaluation of CNF/PVAm multilayer modified cellulose fiber and cellulose model surface
- Chemical pulping
- Dewatering properties of low grammage handsheets of softwood kraft pulps modified to minimize the need for refining
- NSSC pulping of fast growing trees
- Addition of corn fiber xylan to eucalyptus and pinus pulp and its effect on pulp bleachability and strength
- Recovery
- Removal of hazardous trace elements from green liquor dregs by mechanical separation methods
- Bleaching
- Additives to decrease cellulose chain scission during ozone bleaching of wheat straw pulp
- Mechanical pulping
- Comparative properties of nanofibers produced using unbleached and bleached wheat straw pulps
- Effects of chip pretreatment and feeding segments on specific energy and pulp quality in TMP production
- An experimental study of the chipping process with focus on energy consumption and chipping angles
- Average fibre length as a measure of the amount of long fibres in mechanical pulps – ranking of pulps may shift
- Paper technology
- The effect of in-line foam generation on foam quality and sheet formation in foam forming
- The wet strength of water- and foam-laid cellulose sheets prepared with polyamideamine-epichlorohydrin (PAE) resin
- Manufacture of high bulk paper using alkali swollen kraft pulp
- Paper physics
- The impact of zeolite filler on ageing and mechanical failure of paper
- The relationship between shrinkage and elongation of bleached softwood kraft pulp sheets
- Paper chemistry
- Engineered porous calcium silicate as paper filler: effect of filler morphology on paper properties
- Printing
- Edge spread function for the paper-ink system
- Packaging
- Lignin-containing coatings for packaging materials
- Environmental impact
- Application of Fenton’s reagent degrades dissolved and colloidal substances in old corrugated container white water
- Quick estimation for pollution load contributions of aromatic organics in wastewater from pulp and paper industry
- Recycling
- Circular action treatment (CAT): a new strategy for mechanical treatment of old corrugated containers II – comparison of CAT with low-consistency beating
- Corrigendum
- Corrigendum to: The influence of bar width on bar forces and fibre shortening in low consistency pulp refining
Artikel in diesem Heft
- Frontmatter
- Editorials
- Farewell and good luck to Nordic Pulp & Paper Research Journal
- Change of Editor-in-Chief
- Biorefinery
- Kinetic study on the decomposition of cellulose into 5-hydroxymethylfurfural in an ionic liquid/organic biphasic system
- Antibacterial evaluation of CNF/PVAm multilayer modified cellulose fiber and cellulose model surface
- Chemical pulping
- Dewatering properties of low grammage handsheets of softwood kraft pulps modified to minimize the need for refining
- NSSC pulping of fast growing trees
- Addition of corn fiber xylan to eucalyptus and pinus pulp and its effect on pulp bleachability and strength
- Recovery
- Removal of hazardous trace elements from green liquor dregs by mechanical separation methods
- Bleaching
- Additives to decrease cellulose chain scission during ozone bleaching of wheat straw pulp
- Mechanical pulping
- Comparative properties of nanofibers produced using unbleached and bleached wheat straw pulps
- Effects of chip pretreatment and feeding segments on specific energy and pulp quality in TMP production
- An experimental study of the chipping process with focus on energy consumption and chipping angles
- Average fibre length as a measure of the amount of long fibres in mechanical pulps – ranking of pulps may shift
- Paper technology
- The effect of in-line foam generation on foam quality and sheet formation in foam forming
- The wet strength of water- and foam-laid cellulose sheets prepared with polyamideamine-epichlorohydrin (PAE) resin
- Manufacture of high bulk paper using alkali swollen kraft pulp
- Paper physics
- The impact of zeolite filler on ageing and mechanical failure of paper
- The relationship between shrinkage and elongation of bleached softwood kraft pulp sheets
- Paper chemistry
- Engineered porous calcium silicate as paper filler: effect of filler morphology on paper properties
- Printing
- Edge spread function for the paper-ink system
- Packaging
- Lignin-containing coatings for packaging materials
- Environmental impact
- Application of Fenton’s reagent degrades dissolved and colloidal substances in old corrugated container white water
- Quick estimation for pollution load contributions of aromatic organics in wastewater from pulp and paper industry
- Recycling
- Circular action treatment (CAT): a new strategy for mechanical treatment of old corrugated containers II – comparison of CAT with low-consistency beating
- Corrigendum
- Corrigendum to: The influence of bar width on bar forces and fibre shortening in low consistency pulp refining
