Choice Tips of Random packing

Random packing is a granular body with a certain geometric shape and size. It is generally piled up in the tower in a random manner. It is also called random packing or tower packing. The materials for bulk packing are mainly ceramics, metals, and plastics,like metallic pall ring, ceramic saddle ring, plastic raschig ring. According to different usages in different application fields, they are mainly used as tower packing in petrochemical, chemical, fertilizer and other industries, placed in reaction towers, such as desulfurization towers, drying

The choice of packing type should consider the requirements of the separation process, usually the following aspects are considered:

(1) High mass transfer efficiency. In general, the mass transfer efficiency of structured packing is higher than that of bulk packing

(2) On the premise of ensuring high mass transfer efficiency, packing with higher flooding point gas velocity or gas phase kinetic energy factor should be selected

(3) The pressure drop of the packing layer should be low

(4) The packing has strong anti-pollution and blocking properties, and is easy to disassemble and maintain.

The smaller the size of the random packing, the higher the separation efficiency, but the greater the resistance, the smaller the flux, and the cost of the packing increases a lot. The use of large size packings in small diameter columns will result in poor and severe liquid distribution wall flow, thereby reducing the separation efficiency of the column. The larger the specific surface area, the higher the mass transfer efficiency, but the larger the resistance, the smaller the flux, and the higher the packing cost.

When selecting, comprehensive consideration should be given to separation requirements, flux requirements, site conditions, material properties, equipment investment, operating costs, etc., so that the selected packing can not only meet the technical requirements, but also be economical and reasonable. It should be noted that a packed tower can choose the same type of packing with the same specification, or the same type of packing with different specifications; you can choose the same type of packing, or you can choose different types of packing; some tower sections can choose regular Packing, random packing can be selected for some tower sections. According to the principle of unity of technology and economy, the specifications of packing should be flexibly controlled during design.