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Heat Exchanger Fouling and Cleaning VII
July 1-6, 2007 - Tomar, Portugal
| Editors: |
Hans Müller-Steinhagen, Institute of Technical Thermodynamics, German Aerospace Centre (DLR)
and Institute for Thermodynamics and Thermal Engineering, University of Stuttgart, Germany
M. Reza Malayeri, University of Stuttgart, Germany
A. Paul Watkinson, The University of British Columbia, Canada |
The articles for these proceedings are peer-reviewed.
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EXPERIMENTS AND MODELLING OF CALCIUM SULPHATE PRECIPITATION UNDER SENSIBLE HEATING CONDITIONS: INITIAL FOULING AND BULK PRECIPITATION RATE STUDIES
F. Fahiminia, Department of Chemical and Biological Engineering, The University of British Columbia, 2360 East Mall, Vancouver, B.C., Canada V6T 1Z3
A. P. Watkinson, Department of Chemical and Biological Engineering, The University of British Columbia, 2360 East Mall, Vancouver, B.C., Canada V6T 1Z3
N. Epstein, Department of Chemical and Biological Engineering, The University of British Columbia, 2360 East Mall, Vancouver, B.C., Canada V6T 1Z3
ABSTRACT:
Crystallization of calcium sulphate, an inverse
solubility salt, on a heated surface under sensible heating
conditions has been studied. A temperature measurement
technique was employed to detect initial fouling rates.
Fouling experiments were carried out to determine how
process variables such as surface temperature and velocity
affect the initial fouling rates of calcium sulphate scaling.
Experimental results show that, at a given surface
temperature, there exists a maximum initial fouling rate
for a range of fluid velocities. Also, this maximum rate
and the fluid velocity at which it occurs both increase as
the surface temperature increases. These observations are
all qualitatively in agreement with the Initial Fouling Rate
Model (IFRM) of Epstein (1994). The fouling
experiments were supplemented by kinetic batch
experiments to make a comparison between fouling
activation energies and purely chemical activation
energies.
F. Fahiminia, A. P. Watkinson, and N. Epstein, "EXPERIMENTS AND MODELLING OF CALCIUM SULPHATE PRECIPITATION UNDER SENSIBLE HEATING CONDITIONS: INITIAL FOULING AND BULK PRECIPITATION RATE STUDIES" in "Heat Exchanger Fouling and Cleaning VII", Hans Müller-Steinhagen, Institute of Technical Thermodynamics, German Aerospace Centre (DLR)
and Institute for Thermodynamics and Thermal Engineering, University of Stuttgart, Germany
M. Reza Malayeri, University of Stuttgart, Germany
A. Paul Watkinson, The University of British Columbia, Canada
Eds, ECI
Symposium Series, Volume RP5 (2007). http://services.bepress.com/eci/heatexchanger2007/25
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