Bast Fibre ProcessingPneumatic Transport and Filtration

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:

Design and Production of :

3Bast Fibre Processing

Flax Scutching

Core Cleaning

Pneumatic Transport Systems

Contact

4

8

10

12

16

Content

Bast Fibre ProcessingSeparation 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’)

4

Short Fibre Baling

Online Transfer to Refining Lines

Core Buffer Container

Dust ExtractionFilter Units

5Refining Lines

Core Cleaning

Buffer Silo for Core

Mineral Dust Treatment

Bale Opening

Dust Briquetting

Decortication Section with Decorticators and Fibre Separators

Fibre Balers

Pallet HandlingRobot + Wrapping Unit

Entrance of Refining Lines

Hopperfeeder to Open Fibre Material and to Form a Regular Layer Towards the Refining Lines

6Bast Fibre ProcessingFurther 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

Air Separators for Pneumatic Transport &

Feeding of Fibre Material

Clean Fibre Baler

7Bast 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.

8Scutching TurbineScutching 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

Aspiration of Tow

Primary Seed Cleaning (Shaking Unit)

Ripping Comb for Removal of Seed Balls

Entrance of the Line (Unrolling of Flax Bales)

Divider(Increase of Flax Layer Speed)

Breaking Units

Scutching Elements for the Bottom Part of Flax Stems Transfert

Unit

Scutching Elements for the Top Part of Flax Stems

Exit of the Line(Final Quality Check)

Baling Press forScutched Flax

9Differents sections in the line:

• 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

Scutching Turbine

10Core Cleaning

Flax Shive Cleaning Duvex Equipped with Seed Separating System

BigBag Filling Station for the Seed

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.

Separating of Seed(Small Shives are Aspirated to a Cyclone)

Fibre Exit(Fibres go to a Baling Press)

Removal of Clean Shiveswith Screw Conveyors

Air Separator for Material Discharge (and Dust Removal)

Inclined Shaker

Drum Sieve

Zigzag

11

Buffer Silo and Bagging Units

Buffer Silo to store clean core material

Bagging units to press the core into bags. Different bag sizes are possible based on specific market demands.

High capacity automatic bagging presses complete with stacking robot and wrapping unit

Semi-automatic bagging presses with manual removal of the bags

Filling of containers if the core has to be stored in bulk. Filling system with screw conveyors or with a high pressure blowing circuit.

12Pneumatic Transport Systems

Filter Unit

Chopper Fan for Cardboard Waste

Processing of paper and card board waste

Aspiration and discharge of waste material over rotary air separators.

The waste material is baled with a horizontal baler and the dust is evacuated towards a filter unit.

Air Separator for Discharge

of Waste Material

Buffer BeltConveyor

Horizontal Baling Press (Hydraulic)

13

Transport Fans for Waste Coming from Multiple Production Lines

Processing of waste coming from the production of hygienic products such as diapers, sanitary napkins, incontinence pads, make up pads, etc. made out of paper shreds, cotton, plastic foil, dust and powder

Aspiration of waste material and discharge with a rotary air separator above a hydraulic baling press

After baling and wrapping the waste is ready for transport to a recycling facility.

The dust is evacuated towards a filter unit.

Pneumatic Transport Systems

Bale Evacuation and Weighing System

Wrapping Unit

Vertical Baling Press

Compression Belt

Air Separator for Material Discharge

Pneumatic Valves to Send Waste Material to Second Baling Press (Bypass System)

Buffer Belt Conveyor

14 Processing of waste coming from the production of insulation material (mineral wool)

• The waste material can be recycled immediately (by blowing it back to the start of the production lines) or it can be evacuated towards a hydraulic baler.

• The dust is aspirated and collected in a series of filter units.

Transport systems for natural and synthetic fibres

• Pneumatic transport over rotary or drum separators is applied frequently because dust is separated during transport of the material. This improves the quality of the fibre material.

• The dust is collected in a filter unit.

Air Separator

Pneumatic Transport Systems

Filter Units(Working in Negative Pressure)

Electrical Control Cabinet

Crushing / Shredding Unit

Horizontal Baling PressFeeding Belt Conveyor for Waste Material

Suction Fan Placed Inside Sound Reducing Enclosure

Belt Conveyors

Dust Fan(part of Pneumatic Dust Removal Circuit)

Dust Cyclone(part of Pneumatic Dust Removal Circuit)

15Other Equipment

Hopper Feeders (Opening of fibre material)

Baling presses (Sister Company: Valvan Baling Systems)

Filters – Fans – Separators (Complete systems for pneumatic transport and dust extraction)

Electrical control systems

Van Dommele EngineeringBissegemstraat 1698560 Gullegem - WevelgemBELGIUM

Tel.: +32 (0)56 41 10 94Fax: +32 (0)56 41 99 56INFO@VANDOMMELE.BE

W W W. VA N D O M M E L E . B E