PNEUMATIC CONVEYING SYSTEM

A pneumatic conveying system transfers powders, granules, and other dry bulk materials through an enclosed horizontal or vertical conveying line. The motive force for this transfer comes from a combination of pressure differential and the flow of air (or another gas) supplied by an air mover, such as a blower or fan. By controlling the pressure or vacuum and the airflow inside the conveying line, the system can successfully convey materials.

Lean phase pressure conveying is one of the most common conveying methods for powders or granules. It’s most often used with non-abrasive, non-fragile materials that have a light bulk density common examples are flour, sugar, corn starch, plastic granules, sodium bicarbonate, hydrated lime, activated carbon, and zinc oxide.

Dense phase pressure conveying is suitable for gently conveying abrasive materials over long distances. Commonly handled materials include silica sand, fly ash, alumina, glass batch mix, carbon black, sorbitol, dextrose, candies, resins, cocoa beans, hazelnuts, and puffed rice cereal. The system conveys materials at a relatively low speed to reduce materials degradation, air consumption, and abrasion on pipeline, bend, and diverter contact surfaces.