Notes
Slide Show
Outline
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Commercial scale microwave processing to improve wood permeability

  • by


  • Peter Vinden, Grigori Torgovnikov, Jeff Hann, Alex Shaginov, Peter Plews and Henry Senko.
  • The University of Melbourne, Creswick, 3363, Vic Australia.


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Ruptured rays in wood

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MW Hardwood Timber Treatment for Fast Drying
  • MW energy consumption 80 – 160 kW-h/m3


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MW Plant for Timber Modification
        MW power         300 kW (0.922 GHz)
Timber size        100-350 mm
Feeding speed   4 – 400 mm/s
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Applicator 350B for 300 KW MW Plant
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Experimental on-line impregnation treatment plant
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High Speed Packet Treatment




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Preservative Uptake after
 Bethell treatment
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Applications of Commercial interest
  • Preservative treatment
    • New automated treatment plant
    • New schedules
    • Fast treatment
    • Fixed preservatives
    • New non-toxic preservatives
    • Piece by piece treatment
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Applications of Commercial interest
  • Automated “Q” treatment and CCA fixation of softwoods
    • -Posts
    • -Poles
    • -Sawn timber
  • Hardwood
  • -Posts
  • -Poles
  • -Sawn timber
  • Railway sleepers



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Softening Equipment
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Research Bending Equipment
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Innovative bending machine
Spiral bending form
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Market Research Study
  • Market Opportunities for Bent Wood Components in Australian Furniture Manufacturing




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Market Size
  • Demand for 7,000 components per day (based on companies’ responses to survey)


  • Total potential market volume (FIAA members) = 26,000 components per day.




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DEVELOPMENT OF FEASIBLE TECHNOLOGIES APPLICABLE TO WOOD PRODUCTS
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An increase in the intensity of the MW energy supplied to the wood increases the internal steam pressure resulting in the formation of narrow voids in the radial-longitudinal planes.

Tangential section of wood with a number of voids inside after MW modification
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Production line
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Maximum modification
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Commercially Ready Technologies
  • Microwave modified hardwoods for drying
  • Microwave modified radiata pine heartwood for preservative treatment. (softwood poles, hardwood posts, poles and sawn timber).
  • Microwave modified radiata pine heartwood for railway sleepers


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Commercialised Technologies
  • Wood Bending (Wood shapes).
  • Novel treatment plant and preservatives for radiata pine.
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CRC Technologies pending commercialisation
  • 6. Surface activationVintorg
  • 7. Bio-resin and bio-fuel production
  • 8. Others


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Future directions

  • Collaboration with INNOVAWOOD
  • Microwave for veneer logs and veneer drying
  • Microwave wood chip  pulping
  • Multi-storey construction