• Agitated Thin Film Dryer (ATFD) for evaporation of water/solvents to make concentrated liquid to dry powder up to 10% moisture. Based on application either recovered solvent or dry product is important. Agitated Thin Film Dryer design is the ideal apparatus for continuous processing of concentrated material for drying.

Agitated Thin Film Dryer Principle:

• ATFD for evaporation of water/solvents to make concentrated liquid to dry powder or flakes. Based on application either recovered solvent or dry product is important. ATFD design is the ideal apparatus for continuous processing of concentrated material for drying. ATFD is consist of cylindrical, vertical body with heating jacket and a rotor inside of the shell which is equipped with rows of pendulum blades all over the length of the dryer.
• The hinged blades spread the wet feed product in a thin film over the heated surface. A highly agitated bow wave is formed in front of the rotor blades. The turbulence increases as the product passes through the clearance before entering a calming zone situated behind the blades. As the heat will transfer from jacket to main shell under the smooth agitation water/solvent will evaporate and liquid will convert to slurry, to cake and to dry powder or flakes.
• He vapours produced rise upwards, counter-current to the liquid and pass through a Cyclone Separator mounted at the vapour outlet of ATFD. Further these vapours will be condensed in a condenser and recovered as condensate. The system will be operated under vacuum for temperature sensitive products and atmospheric conditions for normal drying.

Features:

• Single point solution for drying applications. Concentration, slurry formation, cake formation, powder / flake recovery. It eliminates the other unit operation like Concentration, Crystallization, Filtration, Centrifuging which required before drying. Eliminate & Rotary Dryer, Pulverize and grinding which are required after drying. Compact design eliminates large area requirement. Less maintenance increases efficiency of production.
• User friendly in operation helps for long life of equipment. Degree of freedom to select heat source like steam, hot water, thermic–fluid, etc. Maximum heat transfer coefficient leads less heat transfer area. Flexibility in turn, down ratio, easy to start up and shut down. Operating temperature and pressure flexibility. Maximum operating pressure 1 ATM to minimum operating pressure as 0.5 Torr. Unique design for distribution system and blades for minimum hold up to allow maximum residence time.