Stagewise control Dual-sensor control The purpose of the first stage in bleaching is to continue the delignification – to decrease the Kappa number – and to start brightening. Variations in the incoming Kappa number are the main disturbances for control. A dual-sensor system (compensated brightness control, Figure 1) has long since been the most common
To access this post, you must purchase All themes or Process control and automation. Do you already have a membership or are you part of an organization? log in