Digester

Digester

Digester Challenges
Alkali measurements are used to determine chemical consumption during the various Kraft cooking phases in the digester. These measurements are widely accepted as standard monitoring information, as they provide a solid basis for cooking management and digester optimization.  Traditional measurement methods, such as conductivity and autotitration, tend to foul and drift while only inferring actual values.

FITNIR Solution
FITNIR’s FT-NIR technology offers the most comprehensive and accurate measurements of true pulp liquor properties measurements necessary for an optimal digester environment, devoid of fouling or drifting issues. Our analyzers reliably and accurately provide white liquor EA (Effective Alkali) and sulphidity, as well as black liquor REA (Residual Effective Alkali) at the various cooking zones. Control strategies using reliable data from our analyzers can significantly reduce kappa variation, overcooking and rejects while increasing pulp quality.

Properties Measured

FITNIR’s Digester analyzer application measures black liquor compositions:

*FITNIR Online measurement only

^ Click on Diagram to Enlarge

View Digester Application Brochure

Key Benefits

Project Highlights