Construction of drum dryer for chemical food consumption

The rotary dryer or drum dryer works in a continuous process based on the evaporation of the base solvent and drying the solution to the desired level.
In this equipment, the thick solution or slurry is poured from above on the hot drum. The surface temperature of the drum can be adjusted based on the temperature of the hot fluid used. Due to energy absorption, some of the solvent evaporates and a thin film of solid material is formed on the surface of the drum. The drying process of the thin film continues until its take-off by the scrubber. The rotation speed of the drum is calculated in such a way that the product is sufficiently dried (residual moisture is within the permissible limit).
In cases where sharp and hard crystals form during drying, in order to prevent damage to the drum or the separating blade, anti-wear scrubbers are used, which sometimes have a completely different nature from the blade (cutters). is selected Therefore, the variety of drum types in this equipment is relatively high.