Customer case:

Navigator Cacia and Valmet team up to optimize causticizing process targets

Online liquor analysis and advanced controls stabilize the liquor conversion chain and increase white liquor active alkali by 4,7 %. With extra process visibility problems were uncovered, leading to further improvements and ROI potential at the Navigator Company’s Cacia mill in Portugal.

Navigator Cacia mill has a Valmet Recovery Liquor Analyzer
We planned to obtain better white liquor quality, stabilized causticizing efficiency, and sulfur and alkali indices, plus lime and natural gas reduction.
Fernando Martins, Recovery Plant Manager, Navigator Cacia
Summary
Location Navigator Company’s Cacia mill, Portugal
Customer challenge Obtain better white liquor quality, stabilized causticizing efficiency, and sulfur and alkali indices, plus lime and natural gas reduction.
Solution

Valmet Recovery Liquor Analyzer (Valmet Alkali R)

Valmet Advanced Process Control (Valmet APC) 

Results

The online measurements and advanced controls have stabilized the entire chemical conversion process and allowed the target shifting of key process indicators. With improved stability, overliming has also been eliminated.

After only a few months of operation, the results of the project were seen in:

  • increased stability of the entire process from green to white liquor
  • consistently higher causticizing efficiency
  • more stable white liquor with a higher active alkali
Keywords Pulping and fiber, Europe, Automation 

Recovery Liquor Analyzer

The Valmet Recovery Liquor Analyzer (Valmet Alkali R) provides tools to improve recovery boiler reduction performance with its unique on-line reduction degree measurement.

Advanced Process Controls for pulp

Maximizing process performance is a critical success factor as it directly increases profitability.