Application of Metal pall Rings in Distillation Separation Towers

I. Performance Advantages of Metal pall Rings

Metal pall rings form a three-dimensional flow channel network through the staggered window holes on the ring wall and the inner tongue design (opening rate 30%-40%), which significantly optimizes the gas-liquid distribution. Compared with traditional Raschig rings, its advantages include:

Mass transfer efficiency is increased by 20%-30%: the effective mass transfer area is 180-350m²/m³, and the gas-liquid contact frequency is increased by 25%.

Pressure drop is reduced by 30%-50%: when the empty tower gas velocity is 1.2m/s, the risk of liquid flooding is reduced by more than 20%.

Processing capacity is increased by 50%: under the same pressure drop, the flux is increased by 50%-100% compared with Raschig rings.

II. Application fields and typical cases of metal pall rings

Application of metal pall rings in petrochemicals

Synthetic ammonia decarbonization tower: DN50 specification 316L pall rings are combined with graded filling, and the absorption efficiency is increased to 95.5%.

Toluene separation unit: DN76 specification products increase the processing capacity by 50%, saving 5,000 tons of steam annually.

Application of metal pall rings in environmental protection projects

Waste gas treatment: In the scrubber, pall rings increase the removal efficiency of SO₂ and NOx by 30%.

Sewage treatment: The amount of microorganisms attached to the surface of the filler in the biofilter increases by 2 times, and the COD removal rate reaches 90%.

Application of metal pall rings in special processes

Vacuum distillation tower: The flat ring structure with a diameter-to-height ratio of 0.9 reduces the pressure drop by 15%, which is suitable for the separation of heat-sensitive materials.

Carbon dioxide degassing tower: DN25 specification fillers make the CO₂ absorption rate reach 98%.