I. Specifications and performance of metal pall ring

38mm metal pall ring is a high-efficiency random packing commonly used in industrial towers. Its design optimizes gas-liquid distribution through the staggered window hole structure on the side wall. The following are the key technical parameters:

Metal pall ring geometric characteristics: outer diameter 38mm, height 38mm, wall thickness 0.4-0.8mm, 10 staggered rectangular window holes on the side wall, and the window leaves are bent inward to form a three-dimensional flow channel.

Metal pall ring performance indicators:

Specific surface area: 129-146 m²/m³ (varies with wall thickness)

Porosity: 94.5%-95.9%, much higher than traditional Raschig rings, with a pressure drop of 30%-40%.

Bulk density: 218-328 kg/m³ (metal material), plastic material can be as low as 180 kg/m³.

Dry packing factor: 153 m⁻¹, mass transfer efficiency is 20%-30% higher than that of Raschig rings.

2. Application fields and process advantages of metal pall rings

Metal pall rings are widely used in scenarios requiring efficient mass transfer and low pressure drop:

Petrochemical: synthetic ammonia decarbonization tower, toluene separation tower, tar distillation tower, with a processing capacity increase of more than 50%.

Environmental protection engineering: waste gas scrubber, ozone contact reaction tower, gas purification efficiency of 95.5%.

Special process: carbon dioxide degassing tower, isooctane/toluene separation unit, applicable temperature ≤400℃ (metal material).

Typical case of metal pall rings:

Tar distillation tower transformation of Shanxi coking plant: 304 stainless steel DN25 pall rings are used to replace ceramic Raschig rings, reducing fluid resistance by 28% and saving 5,000 tons of steam annually.

Oxidation tower of a PTA unit: 316L material DN76 pall rings are used, and the absorption rate is restored to 95.5%.

38mm metal pall rings have become the core fillers of towers in the fields of chemical industry and environmental protection with their efficient mass transfer, low pressure drop and material diversity. When selecting a model, it is necessary to comprehensively consider process conditions, medium characteristics and cost budget, and give priority to suppliers with customization capabilities and technical strength, such as ksourceep