Application of polypropylene plastic pall ring in absorption tower

一、Working principle of absorption tower and core role of pall ring

Absorption tower realizes pollutant absorption (such as SO₂, H₂S, VOCs) through gas-liquid countercurrent contact. The key roles of polypropylene pall ring as filler include:

1. Increase contact area: The surface area of 76mm pall ring is 73 m²/m³, providing sufficient interface for gas-liquid reaction.

2. Optimize flow field distribution: The window hole structure breaks the fluid channel effect, reduces wall flow phenomenon, and improves mass transfer uniformity.

3. Reduce pressure drop: 92% void ratio reduces gas resistance by 40%-50%, reducing fan energy consumption.

二、Key parameters for pall ring selection:

pall ring tower diameter matching: 76mm specification is suitable for absorption towers with tower diameter ≥800mm, and φ25-50mm specification is recommended for small towers.

Liquid-gas ratio of pall ring: The recommended liquid-gas ratio (L/G) is 1-3 L/m³, which may cause flooding if it is too high.

pall ring packing height: usually 3-5 times the tower diameter, which needs to be optimized through experiments or simulations.