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TECHNICAL PAPERS

A Conductance Based Solids Concentration Sensor for Large Diameter Slurry Pipelines

[+] Author and Article Information
James F. Klausner, Feng Fu

Department of Mechanical Engineering, University of Florida, Gainesville, FL 32611

Renwei Mei

Department of Aerospace Engineering, Mechanics and Engineering Science, University of Florida, Gainesville, FL 32611

J. Fluids Eng 122(4), 819-824 (Jun 19, 2000) (6 pages) doi:10.1115/1.1311790 History: Received September 13, 1999; Revised June 19, 2000
Copyright © 2000 by ASME
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References

Williams,  R. A., Xie,  C. G., Dickin,  F. J., Simons,  S., and Beck,  M. S., 1991, “Multi-Phase Flow Measurements in Powder Processing,” Powder Technol., 66, pp. 203–224.
Klug,  F., and Mayinger,  F., 1994, “Impedance Based Flow Reconstruction—A Novel Flow Composition Measuring Technique for Multi-Phase Flows,” Nucl. Eng. Des., 146, pp. 35–42.
Beck,  M. S., Calvert,  G., Hobson,  J. H., Lee,  K. T., and Mendies,  P. J., 1971, “Total Volume and Component Flow Measurement in Industrial Slurries and Suspension Using Correlation Techniques,” Trans. Inst. Meas. Control (London), 4, pp. 133–138.
Lee,  K. T., Beck,  M. S., and McKeown,  K. J., 1974, “An On-Line Instrument for Measuring Small Quantities of Dispersed Non-Conducting Liquid in a Conducting Liquid,” Trans. Inst. Meas. Control (London), 7, pp. 341–345.
Ong,  K. H., and Beck,  M. S., 1975, “Slurry Flow Velocity, Concentration and Particle Size Measuring Using Flow Noise and Correlation Techniques,” Trans. Inst. Meas. Control (London), 8, pp. 453–463.
Nasr-El-Din,  H., Shook,  C. A., and Colwell,  J. M., 1987, “A Conductivity Probe for Measuring Local Concentrations in Slurry Systems,” Int. J. Multiphase Flow, 13, pp. 365–378.
Nasr-El-Din,  H., Shook,  C. A., and Colwell,  J. M., 1987, “The Lateral Concentration Distributions in Horizontal Slurry Pipelines Flow,” Int. J. Multiphase Flow, 13, pp. 661–670.
Colwell,  J. M., and Shook,  C. A., 1988, “The Entry Length for Slurries in Horizontal Pipeline Flow,” Can. J. Chem. Eng., 13, pp. 714–720.
Uribe-Salas,  A., Gomez,  C. O., and Finch,  J. A., 1994, “A Conductivity Technique for Gas and Solids Holdup Determination in Three-Phase Reactors,” Chem. Eng. Sci., 49, pp. 1–10.
Klausner, J. F., Fu, F., and Mei, R., 1998, “Development of An On-Line Concentration Sensor for Slurry Flow Through Large Diameter Pipes,” Florida Institute of Phosphate Research, Publication No. 04-056-152.

Figures

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Cross-section of conductance sensor depicting electrode array
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Schematic diagram of bridge circuit used for conductance measurement
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Assembly diagram of 500 mm conductance sensor
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Assembled view of conductance sensor body
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Block diagram of data acquisition, control, and processing system
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Schematic diagram of the slurry transport test facility
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Solids concentration history upon loading and unloading slurry transport test facility
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Typical measured solids concentration history for a single test using 150 mm conductance sensor
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Local variation of solids concentration in 150 mm conductance sensor
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Comparison of measured solids concentration using conductance sensor and quick-closing valve method in the slurry transport test facility
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Comparison of measured solids concentration using conductance sensor and gamma densitometer at the PCS phosphate swift creek mine, Florida

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