Bast Fibre Processing Pneumatic Transport and Filtration
Design and Production of :
Complete processing lines for natural fibres (flax, hemp and kenaf).
Pneumatic transport and dust extraction systems for natural and synthetic fibres, paper and card board waste, insulation material, hygienic products, wood, etc...
Engineering: A team of enthusiastic engineers for the development and innovation of all our products.
Manufacturing: Work shop with highly skilled metal workers who build the machines.
Assembly: Experienced mechanics travelling all over the world for the assembly and start up on site.
Company Structure:
Bast Fibre Processing
Flax Scutching
Core Cleaning
Pneumatic Transport Systems
Contact
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Content
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Bast Fibre Processing
Separation of fibre and core from hemp, flax or kenaf
Processing line with capacity of 6 to 8 tons per hour of raw straw at the entry of the line. A line for 3 to 4 tons per hour is also possible.
Turn key project including electrical controls, bale handling equipment, assembly of the line and start up on site
Important aspects for good processing are:
• Length of straw at entrance: Ideally 400mm (Max. 600mm)
• Moisture content: Flax and Hemp 12-18%; Kenaf 18-25%
• Straw quality: Fibre percentage of input material ±25%
• Straw condition: Slightly retted to a gold or light-grey colour
• Stalk diameter: not higher than 20mm
First section of the line: Opening & Decorticating of the straw
Output fibres with approx. 15-20% of core (‘paper quality’)
Short Fibre Baling
Online Transfer to Refining Lines
Core Buffer Container
Dust Filter Extraction
Units
Refining Lines
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Core Cleaning
Buffer Silo for Core
Mineral Dust Treatment
Bale Opening
Dust Briquetting
Pallet Robot + Handling
Wrapping Unit
Decortication with Decorticators Section
and Fibre Balers
Fibre Separators
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Air Separators for Pneumatic Transport & Feeding of Fibre Material
Clean Fibre Baler
Bast Fibre Processing
Further cleaning of the fibres up to a point where they contain less than 5% of core (‘technical fibres’)
The clean fibres are ready for further processing, for example in the automotive, non woven or furniture industry. New applications in composite and construction material are also gaining interest.
Online transfer from the decorticating section to several refining lines
Fibres are baled after refining
Conveyor for Manual Feeding of Fibre Bales
Entrance of Refining Lines
Hopperfeeder to Open Fibre Material and to Form a Regular Layer Towards the Refining Lines
Bast Fibre Processing
Cleaning of the core material (removal of short fibres)
The clean core can be used as stable bedding or in construction material
The wooden core of a bast plant is also called: Shives (North America), Shivs United Kingdom), Hurds (Australia), Wood (Netherlands), Anas/Chènevottes (France) or Schäben (Germany).
Pressing in bags or storage in bulk
Dust extraction for the complete line with filter units in negative pressure.
Separate treatment of mineral and organic dust.
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Divider (Increase of Flax Layer Speed)
Ripping Comb for Removal of Seed Balls
Entrance of the Line (Unrolling of Flax Bales)
Scutching Turbine for Long Fibre Flax
Capacity of 3.000tons per hour (good quality flax)
The scutched flax is ready to be combed (heckled) and processed further into yarn and eventually into linen textiles.
Van Dommele builds complete scutching lines but also equipment to clean the by- products such as the core, the tow (or short fibres) and the seed.
Aspiration of Shives
Scutching Turbine
Aspiration of Tow
Primary Seed Cleaning (Shaking Unit)
Breaking Units
Scutching Elements for the Top Part of Flax Stems
Scutching Elements for the Bottom Part of Flax Stems
Transfert Unit
Exit of the Line (Final Quality Check)
Baling Press for Scutched Flax
Scutching Turbine
Differents sections in the line:
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• Opening of the bales (+ aspiration of the seed)
• Breaking of the stems (+ aspiration of the shives)
• Scutching of the fibres (+ aspiration of the tow)
• Baling of the scutched long fibre flax
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Core Cleaning
Removal of impurities such as short fibres, seed, dust and rocks.
Various possibilites; duvex separators, shakers, drum sieves, zig zags, etc.
Depending on the required capacity a detailed cleaning system is designed.
Removal of the dust is in many cases achieved using pneumatic transportation over air separators.
Flax Shive Cleaning Duvex Seed Separating Equipped with
System
Fibre (Fibres Exit
go to
Removal with Screw of Clean Conveyors
Shives
a Baling Press)
BigBag Filling Station for the Seed
Separating of Seed (Small Shives are Aspirated
to a Cyclone)
Inclined Shaker
Zigzag
Drum Sieve
Air Separator for Material Discharge (and Dust Removal)
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