ChE 61_Activity 9

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Activity No. 9: Agitation and Mixing of Fluids Date Started: Due: ACTIVITY NO. 9 MIXING OF NaOH AQUEOUS SOLUTION IN A BAFFLED AGITATOR TANK The Objectives of the Activity At the end of the activity, the student should be able to: 1. Apply the concepts and rules of thumb in designing an agitator tank. 2. Use prescribed figures, tables, and graphs for estimations and calculations. The Problem What power will be required to mix an aqueous solution of 50% NaOH in a baffled tank, 2 m in diameter? The mixing will be performed in the vertical tank filled to a height of 2 m by a disk turbine with six flat blades. The turbine is 0.67m in diameter and positioned 0.67m above the bottom of the tank. The turbine blades are 0.134m wide and turn at 90 RPM. The solution has a viscosity of 0.012 Pa-s and a density of 1500 kg/m 3 . Scope of Design 1. Solve the power requirement. 2. Prepare and submit an equipment specification sheet, complete with equipment drawing, and attach the required calculations.

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Transcript of ChE 61_Activity 9

Page 1: ChE 61_Activity 9

Activity No. 9: Agitation and Mixing of Fluids Date Started: Due:

ACTIVITY NO. 9 MIXING OF NaOH AQUEOUS SOLUTION IN A BAFFLED AGITATOR TANK

The Objectives of the Activity At the end of the activity, the student should be able to:

1. Apply the concepts and rules of thumb in designing an agitator tank. 2. Use prescribed figures, tables, and graphs for estimations and calculations.

The Problem What power will be required to mix an aqueous solution of 50% NaOH in a baffled tank, 2 m in diameter? The mixing will be performed in the vertical tank filled to a height of 2 m by a disk turbine with six flat blades. The turbine is 0.67m in diameter and positioned 0.67m above the bottom of the tank. The turbine blades are 0.134m wide and turn at 90 RPM. The solution has a viscosity of 0.012 Pa-s and a density of 1500 kg/m3. Scope of Design

1. Solve the power requirement. 2. Prepare and submit an equipment specification sheet, complete with equipment

drawing, and attach the required calculations.

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