A New Sensor Based Approach to Brown Stock Washer Optimization, 2015 PEERS Conference

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The fundamental purpose of the brown stock washer operation has remained unchanged and that is to economically
remove the maximum amount of dissolved organic and soluble inorganic material present in the pulp mass at the
end of the washers while minimizing the amount of fresh or recycled water used. Dilution factor has been shown to
be one of the important variables that can be used to control this economic optimum. Expressing washer losses to
calculate washing efficiency has traditionally relied on measuring the conductivity either of the last stage filtrate or
occasionally of the pulp mat. Research has shown that this is not as accurate as it could be and a new method has
been developed that measures directly in the pulp mass in a continuous fashion. Combined with the important
measurement of feed consistency, the tonnage rate and washer loading is also properly managed and optimum
shower flows are calculated. A case study will be presented.

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Author: Richard Van Fleet and Sandra Beder-Miller
A New Sensor Based Approach to Brown Stock Washer Optimizati
A New Sensor Based Approach to Brown Stock Washer Optimization, 2015 PEERS Conference

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