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The blending efficiencies of some impellers in batch mixing

1972; Wiley; Volume: 18; Issue: 1 Linguagem: Inglês

10.1002/aic.690180133

1547-5905

M. Moo‐Young, K. Tichar, F. A. L. Dullien,

Metallurgical Processes and Thermodynamics

Abstract Mixing times for the blending of viscous liquids with tracer materials have been measured in a mechanically agitated tank using two conventional agitutor types (turbine, helical ribbon) and a series of novel tubular‐type agitators. The range of conditions studied were: viscosity = 1 to 70,000 cP, agitator Reynolds number = 5 to 10 5 , tank diameter = 11.5 in. It was found that in terms of agitator power requirement, the tubular agitators were generally more efficient for viscosities greater than 100cP than the others for the blending process. The effects of pseudoplastic non‐Newtonian fluid behavior, of tank‐baffles, and of tank size on mixing times have also been examined in several of the above cases.