In-line alkali measurement for digester control

Valmet Cooking Liquor Measurement 3400

Continuous alkali measurement is a key ingredient for efficient digester control. With the Valmet Cooking Liquor Measurement 3400, you can measure in-line residual alkali and white liquor in continuous and batch cooking processes. Featuring well-proven Kemotron technology, Valmet sensors are made in Finland and constructed to handle direct installation into the liquor circulation. Using high accuracy temperature and conductivity measurements, the cooking liquor meter calculates continual readings for both effective alkali and active alkali.

Stable measurements with a long lifetime

Easy installation and calibration

Robust and accurate measurement for digester control

Cooking liquor measurement for pulp

Stable measurements over a long lifetime

The unique design of our cooking liquor sensors takes into account the high temperatures and large temperature variations typical in digester applications for extra durability. Our sensors are known to last 10 years or more even in extremely harsh environments.

Despite the at times substantial deposits that builds up on sensors, the Valmet Cooking Liquor Measurement 3400 continues to deliver. A built-in scaling function provides a direct indicator that you can use to fine-tune the sensor cleaning schedule for optimum performance.

Cooking liquor sensor for alkali measurement

Easy installation and calibration

You can install the Valmet Cooking Liquor Measurement meter over the pumps in various positions in the digester.

The transmitter comes with preset calibration curves for white liquor and black liquor concentration. This reduces the time required for startup and simplifies calibration. In addition, Valmet offers a free calibration tool to help customers finetune the alkali meter according to the mill’s lab results.

In a typical digester installation, the sensor is installed over a pump with service valves and a sampling station. In this setup, the sensor can be safely removed even when the digester is running. Our installation connectors support both DIN and ANSI pipe measurement standards.

Downloads
Valmet Cooking Liquor Measurement Datasheet View all materials

References

Optimization of the impregnation circulation alkalinity

Optimization of the impregnation circulation alkalinity

With Valmet BCTMP Optimizer, Metsä Board's Kaskinen targeted to improve the process control and stabilize the alkalinity, resulting in more stable pulp quality, while optimizing the impregnation chemical charge.

Shin Tokai Paper, Japan - Cooking Liquor Measurement

Shin Tokai Paper, Japan - Cooking Liquor Measurement

Reliable alkalinity level process measurements in the impregnation, cooking and washing steps of the chemical pulping process are needed for successful implementation of optimized process control.

Valmet Cooking Liquor Measurement for Chemi-Mechanical Pulping

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.

Optimizing the continuous cooking digesters at Stora Enso Imatra Mills

Optimizing the continuous cooking digesters at Stora Enso Imatra Mills

Stora Enso decided to build a new short-fiber pulp line (line 3) for birch cooking, and later to modernize and convert the existing pulp line 2 to long-fiber. Thus, there was a need to optimize the cooking process.

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