Filler specifications refer to the nominal size or specific surface area of the filler.

Selection of bulk filler specifications

The commonly used bulk fillers for industrial towers include several specifications such as DN16, DN25, DN38, DN50, and DN76.

The smaller the size of similar fillers, the higher the separation efficiency, but the resistance increases, the flux decreases, and the cost of fillers also increases significantly. However, the application of large-sized fillers in small diameter towers can result in poor liquid distribution and severe wall flow, which reduces the separation efficiency of the tower.

Therefore, there should be a regulation on the ratio of tower diameter to packing size, and the ratio D/d of tower diameter to nominal packing diameter should generally be greater than 8.

Selection of regular filler specifications

There are many ways to represent the types and specifications of regular fillers commonly used in industry. In China, specific surface area is commonly used, mainly including 125, 150, 250, 350, 500, 700, and other specifications.

The larger the specific surface area of the same type of structured packing, the higher the mass transfer efficiency, but the resistance increases, the flux decreases, and the packing cost also significantly increases.

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 filler can not only meet technical requirements but also have economic rationality.