Selecting Agitator
Types of stirrer and selecting RPM
The types of stirrer can be categorized as chemical dissolving tank, neutralizing tank, and flocculation tank, and the selection standards are as follows, the RPM usage by each stir tank varying by the liquid to be stirred.
| Item | RPM |
|---|---|
| Chemical dissolving tank | 360, 240, 180 |
| Neutralizing tank | 180, 120 |
| Flocculation tank | 90, 60 |
Types of Impellers
Application and Leading Edge Speed Range
| Usage range of impellers | Range of leading edge speed Vt | ||||||
|---|---|---|---|---|---|---|---|
| Di/Dt | Paddle (%) | Turbine (%) | Propeller (%) | Vt (m/sec) | Paddle (%) | Turbine (%) | Propeller (%) |
| 0.15~0.3 | 9 | 10 | 23 | 2 | 24 | 36 | 24 |
| 0.3~0.5 | 22 | 65 | 54 | 2~5 | 52 | 42 | 58 |
| 0.5~0.9 | 0.5~0.75 : 47 0.9 : 22 |
25 | 23 | 5~8 | 24 | 21 | 18 |
