Abstract
The performance of five agitator designs for solid suspension duty has been assessed using sand slurry in a 900 mm diameter tank. One-dimensional vertical solids concentration profiles were measured using a Y-ray backscatter technique for sand of two different size fractions (300 to 500 pm and 50 to 200 pm) at four bulk solids concentrations from 50% to 65% by weight.
Two different measures of suspension efficiency were calculated from each profile: a suspension index expressed as a percent and the standard deviation of local solids concentration about the bulk value. The power efficiency of three proprietary agitator designs (Denver ‘MIL’ propeller, Ekato ‘Intermig’, Scaba ‘SHP’) were compared with that of a marine propeller and a 4-blade, 45° pitched turbine (PBT). In general all three commercial designs tended to be the most power efficient, although under some conditions the marine propeller performed best. The PBT generally performed relatively poorly.
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© 1992 Springer Science+Business Media Dordrecht
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Heywood, N.I., Rehman, S., Whittemore, R.G. (1992). A Comparison of the Efficiency of Five Agitator Designs for Solids Suspension Duties at High Solids Concentrations. In: King, R. (eds) Fluid Mechanics of Mixing. Fluid Mechanics and Its Applications, vol 10. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-7973-5_14
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DOI: https://doi.org/10.1007/978-94-015-7973-5_14
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