Question
6-40. Your boss has assigned you the job of designing a rapid-mix tank for the new water treatment plant for the town of Waffle. The design flow rate is 0.050 m³/s. The average water temperature is 8°C. The following design assumptions for a rapid-mix tank have been made: 1. Number of tanks = 1 (with 1 backup) 2. Tank configuration: circular with liquid depth = 1.0 m 3. Detention time = 5 s 4. Velocity gradient 750 s¹ 5. Impeller type: turbine, 6 flat blades, Np=3.6 6. Available impeller diameters: 0.25, 0.50, and 1.0 m 7. Assume B=H Design the rapid-mix system by providing the following: 1. Water power input in kW 2. Tank dimensions in m 3. Diameter of the impeller in m 4. Rotational speed of impeller in rpm Continuing n of the tmont Jan 25, 2024 learnandcare
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