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The pall ring is greatly improved on the raschig ring. Although the outer diameter of the ring is also equal to the height, two rows of windows with internal tongue plates are opened on the ring wall, and there are five tongue plates each height position. This structure improves the gas-liquid distribution and makes full use of the inner surface of the ring. Compared with raschig ring, the treatment capacity can be increased by more than 50% and the pressure can be reduced by half; It is usually made of metal, especially stainless steel material.
| Size Dia.*Height (mm) | Thickness mm | Pack No. (m3) | Pack Density (kg/m3) | Specific Area (m2/m3) | Void Volume % | Dry Packing Factor |
| 16*16 | 0.3 | 214000 | 396 | 362 | 94.9 | 423 |
| 25*25 | 0.4 | 51940 | 393 | 219 | 95.0 | 255 |
| 38*38 | 0.6 | 15180 | 318 | 146 | 95.9 | 165 |
| 50*50 | 0.8 | 6500 | 314 | 109 | 96.0 | 124 |
| 76*76 | 1.0 | 1830 | 308 | 71 | 96.1 | 80 |
What role does Hualai pall ring packing play in waste gas treatment? When the pall ring is filled in the purification tower, what is the effect of demisting? The packing free volume of pall ring is large, and the packing layer can hold a large amount of liquid for a long time, so as to increase the contact time of gas-liquid phase and improve the mass transfer efficiency of packing. Large free volume, large flow, high quality and high efficiency. It is widely used in chemical packing tower, dust removal, sewage treatment, air purification, waste gas treatment tower and other environmental protection industries. Pall rings are filled on the supporting layer and stacked freely. In addition to effectively reducing the moisture content in waste gas, it is easy to maintain, reduces the corrosion rate of subsequent pipelines, and improves the surrounding working environment.
The diameter of pall ring is equivalent to the height of the ring, but there are two rows of tongue windows on the ring wall, and each layer of hole has five tongue windows. This structure improves the gas-liquid distribution and makes full use of the inner surface of the ring. Pall ring packing has the advantages of large flux, low resistance, high separation efficiency and flexible operation. In general, the pressure drop of pall ring is 50pA to 100Pa.
There are many factors affecting the demisting efficiency, mainly to ensure that the demisting efficiency of the system is more than 80% and the height of the filler layer is between 100-250mm. The material of Hualai pall ring packing can be selected according to the nature and corrosivity of waste gas and gas supply fan. The specification of pall ring packing can be selected according to the characteristics of system waste gas, such as flow rate, SO2 content, water load, dust concentration, absorbent utilization and other comprehensive factors.
Easily wettable
High resistance to fouling
High temperature endurable
High temperature applications
HIGH MECHANICAL STRENGTH
High capacity with low pressure drop
Mechanically robust, lesser probability of breakage
Good liquid/gas distribution and high mass transfer efficiency
