How to select the Random Packing , plastic Random Packing or Ceramic Random Packing？

(1) Plastic fillers The materials of plastic fillers mainly include polypropylene (PP), polyethylene (PE), and polyvinyl chloride (PVC). Polypropylene is generally used in China. The plastic filler has good corrosion resistance, and can withstand the corrosion of general inorganic acids, alkalis and organic solvents. It has good temperature resistance and can be used below 100 ° C for a long time.

Plastic fillers are lightweight, inexpensive, have good toughness, impact resistance, and are not brittle. They can be made into thin-walled structures. Its large flux and reduced pressure are mostly used in absorption, desorption, extraction, dust removal and other devices. The disadvantage of plastic filler is poor surface wettability, but the surface wettability can be improved by proper surface treatment.

(2) Ceramic fillers Ceramic fillers have good corrosion resistance and heat resistance. Ceramic fillers are cheap, have good surface wetting properties, and are brittle and fragile. It is widely used in gas absorption, gas washing, liquid extraction and other processes.

(3) Metal fillers Metal fillers can be made from a variety of materials. Corrosion is a major consideration when selecting. Carbon steel fillers are low in cost and have good surface wetting properties. They should be used preferentially for non-corrosive or low-corrosive systems; stainless steel fillers are highly resistant to corrosion, and are generally resistant to common systems other than Cl–, but their The cost is high, and the surface wetting performance is poor. In some special occasions (such as the vacuum distillation process under very low spray density), the surface needs to be treated to obtain good results; titanium, Fillers made of special alloy steel and other materials are very expensive, and are generally only used in certain highly corrosive materials.

Generally speaking, metal fillers can be made into thin-walled structures with large flux, low gas resistance, and high impact resistance. They can be used under high temperature, high pressure, and high impact strength, and have the widest range of applications.