Noram Solutions for the Pulp Mills

Ismo Mäkinen
Email: ismo.makinen@proboreal.com
Tel: +358444918001
More information: noram-intl.com

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1. CleanFlow™ – Green and White Liquor Filtering systems

Technology

Cross-flow filtering through patented ceramic CleanFlow membrane tube walls, within pore size 0,1–1,0 µm.

Operation

  • Supplementary green liquor filtration capacity operating in parallel with the existing filters. The overall capacity is determined by the number of modules installed. Removes majority of particles in this additional stream.

    • As an example, from level 3000 ppm => reduction of particles even below 6 ppm.

  • Extended white liquor filtration following the existing filtration stage, that further reduces particle concentration.

    • As an example, from around 300 mg/l => even below 2 mg/l.

Benefits

  • If causticizing is the bottleneck, cleaner green liquor directly increases pulp production capacity.

  • In addition, it reduces lime and energy consumption as well as maintenance requirements.

  • Cleaner white liquor improves high-quality pulp production and decreases maintenance needs throughout the entire liquor cycle — including the recovery boiler.

  • The CleanFlow system is modular, scalable, and easy to commission quickly — a low-risk solution for upgrading and enhancing existing filtration performance.

     

Connectivity

An excellent complement to sootblowing systems like HISS or Infrasound, preventing soot and solid buildup in the boiler.

References

CleanFlow is used for green liquor filtration at mills of various sizes in Europe. For white liquor applications, it is already operating in Japan.

2. PDP-K™ – Precipitator Dust Purification

Technology

The ash from the recovery boiler flue gas cleaner is fractionated using traditional ion exchange technology. Dedicated ion exchange beds are used for different substances, effectively separating selected elements from recoverable and useful materials.

Operation

Selective removal of chloride and/or potassium from the cooking chemicals in recovery circulation.  With one or two ion exchange bed(s) system, either or both components can be separated.

Benefits

  • Reduces the need for fresh sodium, sulphate, and other cooking chemicals by recovering them more efficiently from ESP ash than conventional methods.

  • More precise removal of chloride and/or potassium reduces corrosion and fouling in the recovery boiler and associated piping.

  • Extends the recovery boiler’s service life and improves safety, reducing the risk of dangerous deposits and lump formation.

  • Less unspecified, hazardous waste from the mill.

  • Enables the separation and recovery of wood-based elements, creating valuable by-product streams from these recovered elements.

Connectivity

The PDP system can replace traditional leaching or crystallization methods, or complement them installed in parallel or in sequence. Because of modular design, PDP is easy to install also in an old facility.

The PDP concept includes Gore® Filter Tube technology, which serves as a pre-filter for the PDP.

References

More than 10 PDP systems in successful operation around the world — the nearest one in Sweden.

3. Gore® Filter Tube Assemblies

Technology

Advanced pulse filtration with high-performance Gore® membrane tubes.

Operation

An efficient and compact pre-filtration solution, typically used ahead of PDP systems or brine electrolysis units.

Benefits

  • Provides high-efficiency fine particle removal in a single pass, with low clogging tendency.
  • Reduces emissions and enhances process cleanliness.
  • Enables the recovery of valuable fractions (e.g., cadmium) from process streams such as the recovery cycle.

References

Multiple systems successfully operating in applications such as PDP units and water electrolysis plants.

4. LignoForce™ – Lignin recovery from black liquer

Technology

Lignin precipitation through controlled pH shock precipitation.

Operation

Noram’s proprietary solution for lignin recovery from black liquor.

Benefits

  • Enables new bioproducts and revenue streams from natural lignins.
  • The process can be adjusted to produce specific lignin fractions with the desired properties.
  • Developed and tested by Noram since the 1980s, the process is safe and efficient, requiring less CO₂, energy, and water, and producing fewer H₂S and other odor emissions than alternative methods.

References

Research and production references available in North America.


For more information: noram-intl.com

Noram’s separation technologies and Heat Management’s sootblowing systems create valuable synergies:

Prevents deposits from forming and boosts steam cleaning performance.

Prevents the accumulation of impurities and supports effective cleaning in locations lacking steam-cleaning capability.

Enables a fossil-free lime kiln by using lignin as part of the burner’s fuel mix.