D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
D21C 11/04 (2006.01) D21C 11/00 (2006.01)
Patent
CA 2074347
A method for regulating the sodium carbonate concentration of a green liquor in the dissolving tank of the Kraft recovery process by measuring the conductivity of the green liquor from the dissolving tank, measuring the conductivity and flow rate of a weak wash solution being added to the green liquor in the dissolving tank, using these measurements to determine the sodium carbonate concentration of the green liquor in the dissolving tank, and adjusting the volume of the weak wash solution being added to the dissolving tank in response to changes in the concentration of sodium carbonate in the green liquor so as to maintain the concentration of sodium carbonate in the green liquor at a predetermined, preferably constant, level.
Invensys Systems Inc.
Smart & Biggar
The Foxboro Company
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