Disc thickener DF, save-all
  • PULP & PAPER products
  • Paper production
  • Stock preparation
  • Fiber recovery

Fiber recovery

ANDRITZ Disc Filter DF and RotoWash RW

Flexible operation – proven technology with innovative ideas

ANDRITZ Disc Filter

RotoWash RW

ANDRITZ Disc Filter DF – proven technology for thickening and fiber recovery/save-all applications

The disc filter is a vacuum-assisted thickening and fiber recovery machine with rotating discs. It is suitable for thickening and fiber recovery applications with a wide range of stock feed consistencies. The filtrate cycle can be adapted (e.g. vacuum zones, filtrate splits) to the needs of individual processes.

The save-all disc filter incorporates a filtrate valve, which permits greater flexibility for the splitting of filtrates. Cloudy, clear, and super-clear filtrates can be individually adjusted during operation.

Benefits of the ANDRITZ Disc Filter

  • High equipment availability
  • Low-volume sectors to speed up drainage – increased capacity and dryness of the fiber mat
  • Integrated feedbox for perfect mixing of the feedstock
  • Advanced center core to maintain constant vacuum levels with minimum pressure loss
  • Proven, reliable sector design
  • Designed-in flexibility – filtrate split changes possible during the operation

ANDRITZ RotoWash RW – compact, flexible, and efficient fiber recovery with pressure screen technology

The RotoWash RW is used both for de-ashing pulp and recovering fiber from filtrates and sludges. It also can be utilized as a protection filter for shower nozzles, etc. The machine design is based upon well-proven pressure screen technology.

The pulp filtrate of sludge suspension flows over a perforated plate with 100–300µm holes with a high open area. The combination of basket and parabolic rotor creates optimum flow conditions. The fine basket perforations ensure superior fiber retention and boosts filtrate quality.

Benefits of the ANDRITZ RotoWash RW

  • Efficient fiber recovery – low solids content in effluent water
  • Closed system and maintenance-free operation
  • Best adaptability to specific process conditions by simple modification of operating parameters

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Pulping and Fiber
  • pp-paper-machine-approach-fiberrecovery-discfilter.pdf
    ANDRITZ Disc Filter DF

    Disc Filter - Thickening and Fiber Recovery

    PDF : 260 KB
  • ANDRITZ RotoWash

    RotoWash - De-ashing and Fiber Recovery

    PDF : 329 KB
  • Pilot plant Graz

    Fiber preparation pilot plant, for customer trials, research and development

    PDF : 938 KB