Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With testing – sampling or analyzing
8156, 8158, 23230A, 23253A, 68181R, 162 60, 162252, 162253, 162DIG10, 364116, 364510, D21C 902, G06F 1546
A technique for controlling the amount of dissolved material in a slurry liquid stream containing dispersed particulate solids which is being continuously processed in a zone of countercurrent particulate solids separation and washing. Flow rates and conductivity measurements are made on streams entering such zone which are then used to estimate the amount of dissolved material in a starting slurry liquid. Preferably, conductivity measurements are made with electrodeless conductivity measuring probes. The technique is well adapted for use in a brown stock washing system employing a plurality of counterflow washers. The technique can be used for measurement of the quantity of gas in an agitated process stream in such a zone.
patent: 3567574 (1971-03-01), Braitberg et al.
patent: 3814663 (1974-06-01), Ingemarsson
patent: 4014736 (1977-03-01), Sexton
Gossage et al., "Correlation of Solids and Soda Content with Conductivity in Brown Stock Washer Systems", TAPPI, vol. 60, No. 4, Apr. 1977.
Bashore S. Leon
Nalco Chemical Company
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