The difference between a rectangular saddle ring and a pall ring

‌ moment saddle ring ‌ : the shape of moment saddle ring packing is between the ring and the saddle, and has the advantages of both. It combines the ring of the open ring packing, the ring wall opening and the inner protruding tongue, and the curved passage of the rectangular saddle packing. This structure avoids overlap, increases gas-liquid interference and improves mass transfer efficiency. ‌

‌ Pall ring ‌ : Pall ring packing has a ring structure, usually used in the extraction tower, has good corrosion resistance and heat resistance. Its structure is characterized by many small Windows on the ring wall, which increases the gas-liquid contact area and improves the mass transfer efficiency.

Performance difference between rectangular saddle ring and pall ring

‌ mass transfer performance ‌ : The mass transfer performance of the rectangular saddle ring is better than that of the Pall ring because of its unique structure. Its open structure is conducive to the distribution of liquid on the surface of the filler and promotes the renewal of the liquid surface, thus improving the mass transfer performance.

‌ flux and pressure drop ‌ : The torque saddle ring has a larger flux and lower pressure, which makes it more efficient when handling large quantities of liquids. In contrast, the flux and pressure drop of the Pall ring are relatively average.

‌ packing strength and stiffness ‌ : The rectangular saddle ring has better packing strength and stiffness, which makes it more stable under high load operation. Although the Pall ring has a certain strength, it may not be as stable as the torque saddle ring in some application scenarios.

Both Pall ring and torque saddle ring are scattered packing, and the effect of application in packing tower is different with different technology. Industrial waste gas contains hydrogen sulfide, which is one of the main pollutants in the atmosphere. Adsorption of H2S in tail gas by amine solution is a chemical adsorption method, which is a reversible exothermic reaction. The mass and heat transfer process is carried out in the tail gas absorption tower. The tail gas absorption tower adopts 38 mm Pall ring and 38 mm torque saddle ring. According to the Baine-Hogan formula, two kinds of packed towers with the same diameter are calculated. It can be seen that in the case of the same flood value, the packing tower adopts 38 mm moment saddle ring, smaller diameter and lower cost.

Pall ring packing layer purification wastewater is light in weight, does not consume a lot of electricity, and can effectively improve the purification effect of wastewater. Pall ring packing adopts high pressure air cleaning, saves water resources, does not produce secondary pollution, and can be recycled.

Rectangular saddle ring packing is widely used in oil refining industry. By replacing the new packing, the several layers of tray on the top of the refined tower have achieved remarkable results, and the pressure drop of the whole tower has been reduced to varying degrees, thus increasing the vacuum degree of the flash section, the amount of blowing at the bottom of the tower, and reducing the energy consumption.