Plastic Pall Ring, as a key filler in the distillation tower, has performed outstandingly in improving distillation efficiency, reducing energy consumption and adapting to complex working conditions through its unique structural design and material advantages.

1. Working principle: Structural optimization promotes efficient contact between gas and liquid

The plastic pall ring is improved on the basis of the Lassi ring. Two rows of rectangular window holes are opened on the ring wall. The window hole blades are bent inward to form tongue leaves, and the adjacent tongue leaves intersect at the center of the ring. This design achieves three major breakthroughs:

The specific surface area is improved: The structure of the window hole and the tongue leaf improves the utilization rate of the space inside the ring, and the φ25mm specification specific surface area reaches 300m²/m³, providing a larger interface for gas-liquid contact.

The fluid is evenly distributed: the gas forms a rotating flow through the window hole, and the liquid is evenly distributed along the tongue leaf, avoiding the "trench flow" and "wall flow" phenomena, and the mass transfer efficiency is increased by more than 30%.

Low pressure drop characteristics: the void ratio is as high as 0.95 (φ25mm specification), the gas flux increases by 50%, the pressure drop is reduced to 10-20mmH₂O, and the energy consumption is significantly reduced.

2. Performance advantages: dual empowerment of material and structure

Corrosion resistance and lightweight:

It is made of plastic materials such as PP, PVC, PVDF, etc., which are resistant to acid and alkali and corrosion, and are suitable for chemical media (such as chlor-alkali, pickling liquid).

The density is 1/3 of the metal filler, which reduces the weight of the tower and reduces installation and maintenance costs.

High operational flexibility:

It adapts to fluctuations in gas-liquid load, and the 25mm specification is lower in vacuum distillation, making it suitable for separation of thermally sensitive materials.

Anti-blocking ability:

The window hole design prevents solid particles from deposition, reduces the risk of blockage, and extends the operating cycle.

3. Application scenarios: Cover the distillation needs of multiple industries

Petrochemical:

It is used in normal pressure distillation towers and catalytic cracking fractionation towers to improve the yield of light oils.

Case: A refinery uses 50mm PP pall ring, and the methanol/ethanol system processing volume is increased by 20% and the pressure drop is reduced by 15%.

Fertilizer production:

Replace fragile ceramic filler, glass fiber reinforced PP pall ring is heat-resistant to potassium-alkali corrosion, and has a three-fold increase in service life.

Environmental protection field:

It is applied to waste gas absorption towers to efficiently treat corrosive gases containing hydrogen sulfide and ammonia.