A New Sensor and a Novel Control Concept for Optimized Fiberline Operation, 2013 PEERS Conference

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In kraft and sulfite pulp mills several consecutive process stages are used for the pulp production. A pulp mill can therefore be considered to be a rather complicated process industry but still usually only one key pulp parameter is used for process control and that is the lignin content in the fibers, typically expressed as Kappa number. However, to improve the process efficiency more key variables have to be monitored and therefore a new sensor has been developed including a new control concept. This sensor measures the dissolved lignin content in the pulp slurry using a unique principle based on optical measurements and it has the ability to perform the measurement of the dissolved lignin inline even at MC condition.