(a) If the 6-ft tank described in Example 9.6 is equipped with a large impeller (D a...
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(a) If the 6-ft tank described in Example 9.6 is equipped with a large impeller (Da/Dt = 2/3 instead of 1/3), what impeller speed will be needed to give the same power input of 2 hp per 1,000 gal?
(b) How does the predicted mixing time compare with that for the smaller impeller in the same tank?
Example 9.6
A pilot-plant vessel 0.3 m in diameter is agitated by a six-blade turbine impeller 0.1 m in diameter. When the impeller Reynolds number is 104, the blending time of two miscible liquids is found to be 15 s. The power required is 0.4 kW/m3 of liquid.
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a Impeller speed for larger impeller To maintain the same power input of 2 hp per 1000 gal with a larger impeller DaDt 23 we can use the following equ...View the full answer
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Related Book For 
Unit Operations Of Chemical Engineering
ISBN: 9780072848236
7th Edition
Authors: Warren McCabe, Julian Smith, Peter Harriott
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