Valmet Oxygen Stage Optimizer

Valmet Oxygen Stage Optimizer enhances the environmentally friendly Oxygen Delignification especially during disturbances, production rate changes, pulp grade changes, or wood species changes. This process provides a unique method for lignin removal without degrading the pulp strength. The main focus is put on the management of the Kappa number development throughout the process.

Enables higher pulp brightness at reduced cost in an environmentally friendly way

Features

Base calculations and controls to stabilize the process

Chemical dosage (if not in base automation)
Washing water
Temperature
Production rate
Retention time calculations

Model based quality control

Kappa reduction

Management of changes

Production rate, pulp grade, and wood species

Management of disturbances

Retention time estimator
Delignification degree
Channeling monitor

Benefits

Lower and more even Kappa to the bleaching process
More uniform pulp quality
Fewer losses in pulp strength
Chemical savings in the bleaching process
Decrease in the environmental load