Patent ID: 6752165
Filing Date: 2004-06-22
Classification: D21D,Y10S,Y10T

Abstract:
A control system for a rotary disk pulp refiner that has a refining zone between a pair of opposed refiner disks, each equipped with a refining surface, between which a fibrous stock slurry is processed during rotary disk refiner operation, the refiner control system comprising:a sensor carried by one of the refiner disks from which a signal is obtainable that is related to a characteristic of stock in refining zone during refiner operation; a controller (a) that regulates a controlled variable that affects operation of the refiner in response to a process variable that is related to the characteristic of stock in the refining zone obtained from the signal of the sensor and (b) which is configured (i) to pause regulation after a change is made to the controlled variable until steady-state refiner operation is achieved, and (ii) thereafter resume regulation of the controlled variable in response to the process variable.