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System and technique for ultrasonic characterization of settling suspensions

United States Patent

November 28, 2006
View the Complete Patent at the US Patent & Trademark Office
Pacific Northwest National Laboratory - Visit the Technology Commercialization Program Website
A system for determining properties of settling suspensions includes a settling container, a mixer, and devices for ultrasonic interrogation transverse to the settling direction. A computer system controls operation of the mixer and the interrogation devices and records the response to the interrogating as a function of settling time, which is then used to determine suspension properties. Attenuation versus settling time for dilute suspensions, such as dilute wood pulp suspension, exhibits a peak at different settling times for suspensions having different properties, and the location of this peak is used as one mechanism for characterizing suspensions. Alternatively or in addition, a plurality of ultrasound receivers are arranged at different angles to a common transmitter to receive scattering responses at a variety of angles during particle settling. Angular differences in scattering as a function of settling time are also used to characterize the suspension.
Greenwood; Margaret S. (Richland, WA), Panetta; Paul D. (Richland, WA), Bamberger; Judith A. (Richland, WA), Pappas; Richard A. (Richland, WA)
Battelle Memorial Institute (Richland, WA)
10/ 391,070
March 18, 2003
GOVERNMENT RIGHTS This invention was made with Government support under Contract Number DE-AC 0676RLO1830 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.