Performance of hydroclones for removing particles from viscous liquids
The performance of a 1-cm diam, Dorr-Oliver hydroclone with slurries containing approx. 5 wt % solids in water-glycerin solutions was studied to evaluate the effects of fluid viscosity. Micron-sized particles of low-density solids (aluminum oxide, test dust, fly ash, or kaolin) were removed from solutions with viscosities ranging from 1 to 85 cP. Pressure drop across the hydroclone increased with increasing feed rate and viscosity. Gross and centrifugal efficiencies were found to increase with flow rate and decrease with viscosity. Liquid viscosities >10 cP had deleterious effects on the pressure drop and efficiency; thus useful separations were not attained. The particle diameter, corresponding to a point efficiency of 50%, decreased as the product of the inlet Reynolds number and the solid-to-liquid density ratio increased. The reduced efficiency curve was found to characterize the hydroclone performance.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5270613
- Report Number(s):
- ORNL/TM-5684
- Country of Publication:
- United States
- Language:
- English
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