Patent ID: 6017420
Filing Date: 2000-01-25
Classification: D21C,G01N

Abstract:
An automated tracer system for measuring the residence time of pulp as it moves through a pulp mill comprising:means for introducing an iodine salt into a pulp slurry at a first location;an automated detection means for sensing the presence of said iodine salt over a time period in the pulp slurry that is located at a second location in the pulp mill;a controller means for generating a voltage signal in the automated detection means in response to said iodine salt which is sensed in the pulp slurry; anda processor means for comparing the voltage signal with a calibration curve, to determine the amount of iodine salt sensed in the pulp slurry, and for relating the amount of iodine salt sensed to pulp residence time, between said first and second locations.