Customer case:

Valmet Cooking Liquor Measurement for Chemi-Mechanical Pulping

At Metsä Board Kaskinen, Finland, the chemi-mechanical pulping process needs a precise measurement for monitoring alkalinity levels in the wood chips impregnation circulation stage but so far reliable inline process measurement has not been available. The solution was Valmet Cooking Liquor Measurement with the newly developed customized recipe. Aim was to develop a new customized recipe for BCTMP impregnation stage to provide continuous measurement data from the process. The 4-electrode conductivity sensors employed in the measurement are designed to withstand harsh conditions and require minimal upkeeping.

Valmet Cooking Liquor Measurement is used for chemi-mechanical pulping in Metsä Board Kaskinen
Previously we had to rely on our daily laboratory measurements and no real-time process data was available. We have been pleased with the Valmet Cooking Liquor Measurement as it has allowed us to discover new features in our process and now we are able to react quickly to changing conditions without any delays.
Kimmo Lähdes, Operations Manager, Metsä Board Kaskinen
Summary
Location Kaskinen, Finland
Customer challenge
Chemi-mechanical pulping process needs a precise measurement for monitoring alkalinity levels in the wood chips impregnation circulation stage. Previously pH-measurements have been applied but demanding process conditions require special installation and sensors tend to break easily.
Solution
Results

The Valmet Cooking Liquor Measurement with the newly developed customized recipe reacted rapidly to process changes and an excellent correlation with daily laboratory measurements was achieved (Fig. 1)

After proof of concept the measurement can now be combined with Valmet Advanced Process Controls to reach additional cost savings and quality improvements 

Keywords Chemi-Mechanical Pulping, Automation, Europe

Correlation with Valmet Cooking Liquor Measurement and laboratory titration

Figure 1. Correlation with Valmet Cooking Liquor Measurement and laboratory titration (time period, 20 days).

Valmet Cooking Liquor Measurement 3400

Continuous cooking liquor alkali meter measures effective alkali or active alkali from white and black liquor. Its lifetime is of 10 years with minimum maintenance required. Valmet Cooking 3400 is formerly known as Kemotron.

Analyzers and measurements

Valmet analyzers and measurement solutions for challenging process areas.