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Pall Ring

Pall Ring

Pall Ring

Ceramic pall ring is a type of classical random packing, which is developed from the Raschig ring. Commonly, there are two layers of windows opened along its cylinder wall. Each layer has five ligules bending inward the axes of the ring, which is similar to the metallic pall ring and plastic. But the layer and quantity of ligules may different according to the height and diameter variation. Generally, the opening area occupies 30% of the total area of the cylinder wall. This design helps vapor and liquid flow freely through these windows, making full use of the inner surface of the ring to improve the distribution of vapor and liquid. It can also improve the separating efficiency.

 

Chemical properties of Ceramic Pall Ring
SiO2+ Al2O3 > 92% CaO < 1.0%
SiO2 > 76% MgO < 0.5%
Al2O3 > 17% K2O + Na2O < 3.5%
Fe2O3 < 1.0% Other < 1%
Physical Properties of Ceramic Pall Ring
Water Absorption < 0.5% Moh's Hardness > 6.5 scale
Porosity < 1% Acid Resistance > 99.6%
Specific Gravity 2.3–2.4 g/cm3 Alkali Resistance > 85%
Max. Operation Temp. 1200 °C    
Common Specifications of Ceramic Pall Ring
Article Diameter
(mm)
Thickness
(mm)
Surface Area
(m2/m3)
Free Volume
(%)
Number
(pcs/m3)
Bulk Density
(kg/m3)
1001179 25 3 210 73 53500 700
1019610 38 4 180 75 15000 650
1001180 50 5 130 78 6800 600
1019611 80 8 110 81 1950 550
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