When dealing with material surfaces or bonding moisture, rotary flash dryers demonstrate excellent performance. This state-of-the-art equipment is designed for the continuous drying of viscous and non-cohesive slurries, filter cakes, and highly viscous liquids, ensuring that the wet cake is granular and fluidized, enabling instantaneous heat and mass exchange, allowing the dried material to be efficiently collected in the collector as a powder product.
The working principle of the rotary flash dryer is based on an advanced agitated fluidized bed system. During the drying process, the drying agitator acts as a rotor and is responsible for crushing the lumps. At the same time, hot air enters at a fairly high speed, producing a dynamic drying and decomposition of the product, ensuring that the material achieves the desired drying effect in a short time.
Fresh air is drawn in through a hot air generator and can be of a direct or indirect nature. The inlet of the drying chamber is designed in a tangential direction so that the rotating air can be drawn smoothly into the dryer. Hot air generators are compatible with liquid, solid or gaseous fuels and provide an ample source of heat for the drying process. The feed screw pushes the material into the drying chamber, ensuring that the material is evenly distributed and fully exposed to hot air.
The drying chamber has a built-in rotor driven from the bottom and is equipped with a specially designed scraper and grinder. These devices work in tandem to break down the bulk into smaller pieces, further improving drying efficiency. The lumps destroyed by the rotor begin to dry and decompose in the hot air stream at the same time, enabling efficient dewatering and crushing.
The fine powder particles in the air are brought to the top of the drying chamber and precisely sorted by a classifier to the desired size. Particles with larger diameters automatically return to the chamber to continue drying, while fine particles are collected with air through a reverse pulse bag filter. In this process, almost all the powder is realized, which greatly improves the product yield and resource utilization.