Pall ring media is the second generation random packing, it's developed on the basis of the raschig ring packing. packing pall ring media rings is to open one or two layers of rectangular holes in the sidewall, and the base material of the holes is not out of the sidewall but forms inward bending of blade.The same size of pall ring and raschig ring have the same surface area and porosity,but the PTFE pall ring's holes on its sidewall can flow gas-liquid so that the ring inner surface will be took full advantage. | ||||
Size (mm) | Quantity (per m3) | Surface Area (m2/m3) | Void Volume (%) | Dry Packing (m-1) |
16×16×1.0 | 180000 | 188 | 91.1 | 275 |
25×25×1.0 | 49000 | 175 | 90 | 239 |
38×38×1.2 | 13600 | 155 | 89 | 220 |
50×50×1.5 | 6500 | 93 | 90 | 127 |
76×76×2.6 | 1830 | 73.2 | 92 | 94 |
Feature | Plastic pall ring has features such as high free volume, low pressure drop, low mass-transfer unit height, high flooding point, uniform gas-liquid contact, small specific gravity, high mass transfer efficiency and so on, and the application temperature in media ranges from 60°Cto 150°C. For these reasons it is widely used in the packing towers in petroleum industry, chemical industry, alkali-Chloride industry, coal gas industry and environmental protection, etc. |