Rasching ring
In the history of tower packing, rasching ring is the earlist annular packing with fixed geometry shape. It has the following characters: same outer diameter and height, simple structure and low price. But it has problems of asymmetry distribution of liquid and serious phenomena of wall flow and canal flow. Now we usuallly use corruption-resistant ceramic rasching ring in acid making industry.
Technical Data
Ceramic Rasching Ring
| Name | Normal mm | Diameter×Height×Thickness mm | Surface area m2/m3 | Void space % | Bulk density kg/m3 | No.elements per/m3 | Packing factor m-1 |
Rasching ring | Φ16 | 16×16×3 | 250 | 66 | 820 | 178000 | 870 |
| Φ25 | 25×25×3 | 147 | 78 | 510 | 42000 | 310 | |
| Φ38 | 38×38×4 | 100 | 80 | 458 | 12000 | 195 | |
| Φ50 | 50×50×5 | 80 | 81 | 465 | 5600 | 156 | |
| Φ76 | 76×76×9 | 62 | 75 | 575 | 1700 | 147 |