Hot Dispersing System (HDS)

As the most advanced system the HDS produces the best dispersing results. It is also the most flexible system, with optional features such as in-line bleaching. The key feature of hot dispersing is treatment with high temperature at high pulp consistency. This leads to many advantages: improvement of fiber properties, reduction of bacteria, and softening of dirt and tacky contaminants for a more efficient dispersing. Retention time is 2 minutes at a temperature of up to 120°C (248°F).

The system is further described below – with all the treatment steps for dewatering, heating, dispersing and bleaching.

Dewatering zone

Screw press

Dewatering is made to thicken the pulp consistency from as low as 3% and up to 35%. A high consistency pulp entering the heating zone will ensure a low steam consumption, and a better dispersion result.

Heating zone

Plug screw

The heating zone is sealed by a plug screw, in order to achieve a low steam consumption and flexible operating temperatures. Shear forces introduced by the plug screw creates a pre-dispersing effect.

Shredder

Before heating begins, the pulp is shredded into fine pieces. A fine and uniform pulp ensures that all fibers and contaminants reach the required temperature in the pre-heater.

Pre-heater

The pulp is heated to a uniform temperature of 90-120°C, depending on raw material. Wax, hot melts and stickies reach their melting point so that the contaminants’ strength properties are weakened.

Dispersing zone

Infeeder

The infeeder feeds the pulp from the pre-heater to the disperser. The infeed zone of the disperser has patented features that decreases risk of blocking, and contributes to a low energy consumption.

Disperser

The fibers pass through a narrow gap between rotating discs, where any impurities are disintegrated to an invisible size. The devil-tooth pattern of the discs is optimized for each pulp mixture in order to achieve a gentle treatment of the fibers. Adjustment of the disc gap can be done on-line with an accuracy of 0,01 mm.

Discharge plug screw (optional)

A discharge plug screw at the outlet of the disperser is an optional feature that enables high consistency discharges of up to 35%.

Booster pump (optional)

The Grubbens pump is suitable for use directly after the disperser. This solution is optimal for medium consistency discharges of 8-12%.

Bleaching

Pre-bleaching (optional)

Chemicals for pre-bleaching are added at the first plug screw. Bleaching is done in the heating zone where the pulp is under pressure and at high consistency. This leads to minimum dilution effect, low use of chemicals, and low energy consumption.

Post-bleaching (optional)

Chemical post-bleaching is done at the disperser. The process with both pre-bleaching and post-bleaching means that different temperatures, pulp consistencies and chemical types can be used in the two steps.

Our Services

Services throughout the product lifecycle

  • Pilot plant trials

    Test your material in our pilot plant and analyze machine performance in our lab!

    Download info
  • Engineering and project based deliveries

    Customized designs for your unique application.

  • Start-up

    Full service on site with your machine delivery.

  • Global support

    We have offices in Sweden, Canada, Germany, China, and agents all over the world.

  • Service visit

    Let us visit your plant and help you improve performance!

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Contact

Are you in need of technical support or wear parts for your machine? Interested in a visit from our staff or a project quotation? Please contact one of our local offices around the world!

sales@cellwood.se +46 380 76000


Henrik Lefvert Managing Director, Global Phone: + 46 (0)380 76090 Mobile: + 46 (0)70 348 6090 Email: henrik.lefvert@cellwood.se
Sweden
Nihad Atovic Area Sales Manager Phone: + 46 (0)380 76002 Mobile: + 46 (0)72 723 2396 Email: nihad.atovic@cellwood.se
Sweden
Johan Göth Sales & Marketing Director Phone: + 46 (0)380 76092 Mobile: + 46 (0)70 200 0928 Email: johan.goth@cellwood.se
Sweden
Mårten Karlberg Area Sales Manager Mobile: + 46 (0)70 760 4132 Email: marten.karlberg@cellwood.se
Sweden
Christian Stiller Area Sales Manager Mobile: + 46 (0)70 760 8183 Email: christian.stiller@cellwood.se
Sweden
Kaj Trymell Area Sales Manager, Estate Manager Phone: + 46 (0)380 76006 Mobile: + 46 (0)70 673 9042 Email: kaj.trymell@cellwood.se
Sweden
Gith Cedulf Marketing Coordinator Spare Parts Phone: + 46 (0)380 76018 Email: gith.cedulf@cellwood.se
Sweden
Åsa Billfeldt Sales Coordinator Spare Parts Phone: + 46 (0)380 76021 Email: asa.billfeldt@cellwood.se
Sweden
Lotta Roos Sales Coordinator Spare Parts Phone: + 46 (0)380 76005 Email: lotta.roos@cellwood.se
Sweden
Carl-Johan Jarnehammar CFO Phone: + 46 (0)380 76020 Email: carl-johan.jarnehammar@cellwood.se
Sweden
Peter Ek Business Developer, Bioenergy Phone: + 46 (0)380 76012 Email: peter.ek@cellwood.se
Sweden
Veronica Uddén Shipping Manager Phone: + 46 (0)380 76003 Email: veronica.udden@cellwood.se
Sweden
Stefan Virtanen Technical Manager Phone: + 46 (0)380 76025 Mobile: + 46 (0)72 731 3368 Email: stefan.virtanen@cellwood.se
Sweden
Tomas Anarp Senior Technical Advisor Phone: + 46 (0)380 76014 Mobile: + 46 (0)70 644 8478 Email: tomas.anarp@cellwood.se
Sweden
Ola Sahlstedt Product Manager, Krima Phone: + 46 (0)380 76019 Email: ola.sahlstedt@cellwood.se
Sweden
Daniel Stenberg Product Manager, Grubbens Phone: + 46 (0)380 76022 Email: daniel.stenberg@cellwood.se
Sweden
Bengt-Gustaf Tummalid Purchasing Manager Phone: + 46 (0)380 76009 Mobile: + 46 (0)70 644 8476 Email: tummalid@cellwood.se
Sweden
Frank Jiang Managing Director, China Phone: + 86 21 5496 1756-808 Mobile: + 86 138 1680 0426 Email: frank.jiang@cellwood.se
China
Niklas Tunell Area Sales Manager, N & S America Phone: + 1 416 925 8772 Mobile: + 1 416 704 0147 Email: niklas.tunell@cellwood.se
North America
Joel Zachrisson Sales Engineer, Bioenergy Phone: + 46 (0)380 76080 Email: joel.zachrisson@cellwood.se
Sweden
Ulla Fischer Managing Director, Germany Mobile: +49 (0) 171 7326611 Email: ulla.fischer@algasgmbh.de
Germany
Kent Xu Service Engineer Phone: + 86 21 5496 1756 Mobile: +86 138 1642 5353 Email: kent.xu@cellwood.se
China
Cathy Li Administration & Finance Phone: + 86 21 5496 1756 Mobile: + 86 159 0084 6931 Email: cathy.li@cellwood.se
China
Paul Gao Service Engineer Phone: Tel: + 86 139 2260 8493 Email: paul.gao@cellwood.se
China
Tony Lu After Market Sales Engineer Phone: + 86 21 5496 1756 Mobile: + 86 188 0191 0507 Email: tony.lu@cellwood.se
China
Frank Hinterwälder Sales & Application Manager Mobile: +49 (0) 151 15381576 Email: frank.hinterwaelder@algasgmbh.de
Germany
Anja Bock Office & Purchase Email: purchase@algasgmbh.de
Germany
Anja Dabbert Area Sales Manager Mobile: +49 (0) 171 4509590 Email: anja.dabbert@algasgmbh.de
Germany
Christopher Plaß After Sales Email: info@algasgmbh.de
Germany
Patricia Schaffrath Production, Filter Cloth Email: office@algasgmbh.de
Germany