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Note: For vessels with four baffles at wall and J=0.1 Dt

From W. L. McCabe and J. C. Smith (1967). Unit Operations of Chemical Engineering. McGraw-Hill, New York, 262.

Note: For vessels with four baffles at wall and J=0.1 Dt

From W. L. McCabe and J. C. Smith (1967). Unit Operations of Chemical Engineering. McGraw-Hill, New York, 262.

Kl and Kt are collectively called power coefficients of which some values are found in Table 6.1.

For Reynolds number in the transition range (10 < Re < 10,000), the power may be taken as the average of Eqs. (6.8) and (6.10). Thus,

Example 6.1 A turbine with six blades is installed centrally in a baffled vessel. The vessel is 1.0 m in diameter. The turbine, 61 cm in diameter, is positioned 60 cm from the bottom of the vessel. The tank is filled to a depth of 1.0 m and is mixing alum with raw water in a water treatment plant. The water is at a temperature of 25°C and the turbine is running at 100 rpm. What horsepower will be required to operate the mixer?

Solution:

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