A row of DD-Washers
  • Pulp & Paper
  • PULP & PAPER products
  • Pulp production
  • Kraft pulp
  • Fiberline
  • Pulp washing

ANDRITZ pulp washing

Proven technologies with the highest efficiencies

From brownstock to bleaching, washing plays an essential role in maintaining pulp quality throughout the fiberline. ANDRITZ delivers washing solutions that not only result in high quality pulp, but are also efficient and environmentally friendly.

Pulp washers are essential to fiberline performance – from the initial cleaning of the brownstock to the final pulp washing. The washing result at one stage affects all the subsequent stages, so the choice of washers is critical.

No matter what the washing application or position in the fiberline – in greenfield or upgrade situations – ANDRITZ can provide superior washing solutions that result in high-quality pulp being produced in an energy-efficient, environmentally friendly way.

ANDRITZ provides also other washing equipment suitable for special requirements, such as the PD pressure diffuser washer. For all ANDRITZ washing systems, advanced ACE controls and IoT solutions for intelligent maintenance and control are available.

ANDRITZ washing technologies

DD-Washer

DD-Washer drum displacer washer

With almost 400 installations around the world, the ANDRITZ DD-Washer drum displacer washer is clearly preferred for all fiberline washing applications – brownstock, post-oxygen and bleaching. Its key benefits are its low operating costs, low emissions, and extremely high washing efficiency in a design that offers a flexible number of displacement washing stages in a single unit. The DD-Washer drum displacer washer is extremely gentle to fibers because no mechanical pressing is required for washing.


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COMPACT PRESS wash press

The ANDRITZ COMPACT PRESS wash press has been developed to maximize dilution-extraction, displacement and final pressing during the wash cycle. Feeding the COMPACT PRESS wash press at higher consistencies and making greater use of the drum surface provides superior washing capability within a small footprint, making it the best wash press on the market. It is built around the UniWash process concept. This concept has three main features: UniFeed pulp distribution system; high pulp consistency in the wash zone; and low wash liquor velocity. The COMPACT PRESS wash press is built to last, so it requires little maintenance - and when it does need to be serviced, it has several easy-maintenance features that make the task easy.

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GasFree (GF) Filter

GasFree Filter vacuum drum washer

The ANDRITZ GasFree Filter (aka GF-Filter) is an advanced vacuum drum filter washer. GF-Filter washers can be used for brownstock, post-oxygen, and bleach plant washing. Most typically, they are installed as a retrofit to an existing line, and can complement the washing process in special cases when only one stage of washing is required and the washing stage temperatures are not high. They are also suitable for greenfield installations in mills with special requirements (low capacities or non-wood pulps for example).

Contact us and let our experts help you to find the best washing solution for you.

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Automation for the pulp and paper industry

Optimization, data analysis, augmented reality

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Fiberline services

Maintenance, upgrades, optimization, spare parts, wear parts

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Download
  • DD-Washer - Getting the most out washing PDF : 438 KB
  • COMPACT PRESS wash press - Superior washing PDF : 277 KB