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Scale Inhibitor - Axchem
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Scale Inhibitor

Scale inhibitors or antiscalants are chemical additives able to control the formation of scale in water-circulating facilities.

The Controller

AXSPERSE is a family of proprietary chemicals designed to control hard scales from various ions, such as carbonate, sulfate, oxalate, and barium, generated in digesters, bleach plants, and pulp evaporation processes. It can reduce scale build-up and downtime plus improve process control while maximizing the production output. Our dedicated AXCHEM application team is committed to assisting our customers in selecting the best technical and economical approach to meet their targets.

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Related products: Scale Inhibitor

Technology

AXCHEM strategy to prevent scale involves several steps:

  • Data analysis: Understanding scale nature, amount, location & conditions,
  • Solution: Applying boil-out (acid or alkaline) or hydro blastings,
  • Prevention: Managing the woodyard and digester for total Na & residual, brown stock washing/screening fiber, recovery boiler for Na2SO4, recaustization for Na2CO3,
  • Selection: Treating the specific scale,
  • Monitoring: Controlling effectiveness.

Scales are strongly influenced by pH, temperature, ionic concentration, type of wood, water sources, and oxidative bleaching, so they have to be identified and treated continuously and uniquely.

AXSPERSE™ technologies provide threshold inhibition to lower the nucleation rate, disrupting the scale structure and preventing crystal growth, making it easier to remove.

Benefits

  • Improve pulp quality cleanliness & extractive content
  • Reduce screens & nozzles plugging (strainers, heater exchangers, etc…)
  • Limit chemical consumption
  • Reduce downtime for equipment cleaning
  • Recover steam use while improving heat transfer

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