Automatic refiner load control

Details Automatic refiner load control Automatic refiner load control

H - Electricity

02

P

H02P 9/10 (2006.01) B02C 7/14 (2006.01) D21D 1/00 (2006.01) D21D 1/30 (2006.01)

Patent

CA 2130277

The load on a refiner motor is controlled by adjusting the motor load setpoint by monitoring load applied by the refiner and the plate gap between the refiner plates to define the curve of the load versus plate gap relationship. This slope of load versus plate gap relationship is estimated and when the sign of the slope of the curve changes sign indicating operation in an unstable zone of pad collapse and based on the tendency for the refiner to be in the unstable operation zone over a selected period of time exceeding a preset limit adjusting the setpoint lower to approach more closely the maximum load applied over the selected time.

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