1. Heat Transfer Process
A heat source (typically steam) enters the tube bundle through a rotary joint and flows inside the heat exchange tubes. Heat is transferred through the tube walls to the wet material outside via conduction and radiation, achieving indirect heating. After releasing its heat, the steam condenses into water and is discharged from the system through the condensate outlet.
2. Material Movement Process
Upon entering the drying chamber, the material is continuously agitated, lifted, and scattered by lifting blades (flights) mounted on the rotating tube bundle, ensuring even coverage over the outer surfaces of the heating tubes. Simultaneously, the axial thrust generated by the blades causes the material to move steadily from the feed end to the discharge end.
3. Vapor Exhaust Process
As the material is heated, internal moisture vaporizes; the resulting water vapor is extracted from the drying chamber by a fan and discharged after passing through a dust removal system. The entire process operates under negative pressure within a sealed environment to prevent dust leakage.
