pp-kk-recausticizing-limedry
  • ANDRITZ GROUP
  • PULP & PAPER products
  • Pulp production
  • Kraft pulp
  • White liquor plants
  • Recausticizing

ANDRITZ LimeLine recausticizing systems

High quality conversion of green liquor to white

ANDRITZ PULP & PAPER is a leading innovator of chemical recovery technologies to produce high-quality cooking liquor from the inorganic chemicals generated in the recovery boiler and lime kiln.  ANDRITZ LimeLine technologies for recausticizing is the result of many years of experience and a high level of expertise to design, develop, and install these innovative solutions.

Efficiency and control are key to the recausticizing process

The recausticizing process is the final stage in chemical recovery in a pulp mill.  The goal is to achieve an efficient and controlled reaction between green liquor and lime to produce as much strong white liquor (NaOH) as possible with high purity for the cooking process and excellent lime mud filtration properties for the lime kiln.    

ANDRITZ LimeLine: high-quality white liquor and minimal losses

ANDRITZ LimeLine recausticizing technology is central to the LimeLine white liquor plant.  It is responsible for producing high-quality, homogenous white liquor with minimum alkaline loss and waste. The fully automated LimeLine recausticizing plant generates zero effluents.  The equipment achieves high availability and reliability -- making it the most cost-effective and environmentally sound technology for producing white liquor.

LimeGreen green liquor filters

LimeGreen: falling film cross-flow green liquor filter

  • Efficient separation of even small impurities
  • High availability
  • Less make-up lime required
  • No need for lime mud precoat
  • Long-life filter cloth
  • Stable operation

LimeFree: dregs handling free of lime mud

  • No lime mud needed – minimizes the amount of solid waste to landfill
  • Optimized lime purging
  • Small footprint – easy installation

Green Liquor Cooler: efficient and trouble-free

  • Less over-liming and over-boiling
  • No cleaning required
  • Fewer shutdowns for acid washing of white liquor filtration
  • Better causticizing control
  • Efficient droplet separation

LimeSlake: multi-compartment lime slaker

  • Large lime mud particles
  • Improved separation of white liquor – alkali savings
  • Improved filtration of lime mud – alkali savings
  • Higher dry solids in lime mud
  • Self-cleaning
  • Effective scrubber
  • Clean working environment

LimeMilk: one-to-three compartment causticizer

  • Flexible design for optimal sizing
  • Carefully agitated
  • No lubrication water
  • No bottom bearing

LimeWhite: white liquor filter

  • Continuous operation
  • Clean and hot white liquor
  • Fully automated
  • Higher white liquor yield
  • Reduces water circulation
  • Less white liquor dilution

LimeDry (CPR): lime mud washing and dewatering

  • Continuous Precoat Renewal (CPR)
  • Reliable, continuous feed to kiln
  • Continuously high dry solids
  • Filter cloth washing during operation
  • Energy savings and less ring formation in kiln
  • Lower TRS emissions

LimeDry: lime mud washing and dewatering

  • High capacity in a single unit
  • Reliable, continuous feed to kiln
  • Continuously high dry solids
  • Filter cloth washing during operation
  • Energy savings and less ring formation in kiln
  • Less TRS emissions
  • Totally closed design – dust-proof, clean working environment

LimeGreen green liquor filter

Efficient filtration with minimal waste and lime mud free dregs handling at minimal costs.

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Automation for the pulp and paper industry

Optimization, data analysis, augmented reality

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White liquor plant services

Maintenance, upgrades, optimization, spare parts, wear parts

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ANDRITZ Oy
Finland
+358 (0)20 450 5555
chemsys@andritz.com
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