1. Gas-liquid transmission efficiency data

Compared with traditional packing

Processing capacity: Under the same pressure drop, the plastic pall ring is 50%-100% higher than the Raschig ring;

Pressure drop performance: At the same processing volume, the pressure drop is only 50%-70% of the Raschig ring;

Mass transfer efficiency: It is about 20% higher than the Raschig ring, and can save 20%-40% of the packing volume.

Key performance parameters

Porosity: As high as 0.91-0.95 (such as φ25mm specification), greatly reducing fluid resistance;

Specific surface area: Through the annular opening design, the specific surface area is increased by 30%-50% compared with the Raschig ring, enhancing gas-liquid contact;

Flooding speed: Due to the optimized structural design, the flooding speed is significantly improved, and the operation flexibility is greater.

2. Factors affecting gas-liquid transmission efficiency

Packing structure characteristics

Porosity: High porosity (>90%) reduces liquid flow resistance and promotes uniform distribution;

Wetting performance: Plastic materials (such as PP, PVDF) have low surface tension and are easy to form a uniform liquid film, which improves mass transfer efficiency.

Operating conditions

Gas-liquid flow rate: The larger the flow rate, the higher the turbulence of the fluid, and the higher the mass transfer efficiency;

Temperature and pressure: The increase in temperature reduces the viscosity of the liquid, and the increase in pressure promotes the dissolution of the gas, both of which help to increase the mass transfer rate.

Medium properties

Viscosity and surface tension: Low-viscosity liquids are easy to flow, and high-surface tension gases are conducive to the formation of liquid films. The matching of the two can optimize mass transfer.

III. Efficiency optimization direction

Material improvement

Temperature resistance: Add glass fiber or ceramic particles to improve the high-temperature resistance of plastic pall rings;

Corrosion resistance: Use fluoroplastics such as PVDF or ETFE to enhance chemical corrosion resistance.

Structural optimization

Opening design: Adjust the size and arrangement of window holes, such as increasing the number of window holes or optimizing the angle of window blades to increase the specific surface area;

Gradient structure: Design the aperture gradient distribution so that the packing layer has both efficient mass transfer and low pressure drop characteristics.

Surface modification

Hydrophilic coating: Coating nano-silicon dioxide or alumina to improve surface wettability;

Catalyst loading: Loading metal oxides or precious metal catalysts to increase reaction rate and selectivity.

Process control

Dynamic operation: through pulse air intake or liquid spraying, enhance gas-liquid disturbance and improve mass transfer efficiency;

Intelligent monitoring: use differential pressure sensors and online analyzers to optimize operating parameters in real time.

IV. Typical application scenarios

Chemical separation: used for component separation in distillation towers, such as separation of methanol and ethanol;

Environmental treatment: used as filler in absorption towers to remove pollutants such as SO₂ and NOₓ in exhaust gas;

Biochemical engineering: used in fermentation tanks or bioreactors to improve oxygen transfer efficiency.