Agitated Thin Film Dryer (ATFD)
Agitated Thin Film Dryer (ATFD) | Final-Stage Drying for Concentrated Slurries, High TDS Effluent & ZLD Systems
When concentrated slurry, viscous residue or high TDS effluent needs to be converted into dry solids, normal drying methods often struggle.
An Agitated Thin Film Dryer spreads the feed into a thin, continuously renewed film on a heated surface. The result is controlled final drying, better heat transfer and reliable handling of difficult feeds that are sticky, viscous, scaling or high in solids.
What Shachi Offers
Application-tuned ATFD systems engineered around your feed concentration, viscosity, solids content, drying load and final moisture requirement.
Shachi designs Agitated Thin Film Dryers as standalone systems or as part of complete evaporation and ZLD plants. The system can be integrated after MEE, forced circulation evaporator, MVR evaporator or crystallizer depending on the process requirement.
Advantages of Agitated Thin Film Dryers
Protects sensitive products
Converts concentrated slurry into dry solids Useful as a final-stage dryer after evaporation or concentration systems.
Handles sticky and viscous feeds
Continuous scraping helps process difficult materials that may foul or build up on heated surfaces.
Better heat transfer
The thin film improves heat transfer and supports faster moisture removal.
Suitable for ZLD systems
Helps reduce liquid discharge by converting concentrated effluent into manageable solid residue.
Compact and continuous operation
Designed for continuous drying with smaller footprint compared to many conventional drying options.
Key Features
- ATFD rotors with blades or scrapers to create a thin, continuously renewed film.
- Suitable for concentrated slurry, high TDS effluent, viscous residue and semi-solid feed.
- Continuous scraping action reduces fouling and improves heat transfer.
- Designed for final drying after MEE, MVR, forced circulation evaporator or crystallizer.
- PLC / SCADA-based control with interlocks for temperature, vacuum, rotor load and system safety.
- Easy access for inspection, cleaning and scraper maintenance.
Not happy with wet sludge, sticky residue or incomplete drying?
Agitated Thin Film Dryer Applications
ZLD plant final drying
MEE concentrate drying
High TDS effluent drying
Industrial wastewater
Recent Project
Need help selecting the right configuration?
FAQs - Agitated Thin Film Dryer
An Agitated Thin Film Dryer is an indirect dryer used to convert concentrated liquid, slurry or semi-solid feed into dry powder, flakes or residue. The feed is spread as a thin film on a heated surface, while rotating blades continuously scrape and renew the film.
An ATFE is mainly used for evaporation and concentration. An ATFD is used for final drying. ATFE reduces liquid volume, while ATFD takes concentrated slurry or residue and converts it into dry solids.
ATFD is generally used near the final stage of a ZLD system. It receives concentrated effluent from MEE, MVR, forced circulation evaporator or crystallizer and converts it into dry solid residue for disposal or further handling.
ATFD can handle concentrated slurry, high TDS effluent, viscous residue, sticky material, salt slurry and certain solvent-based process residues. The exact suitability depends on feed chemistry, solids content, viscosity and temperature sensitivity.
Yes. ATFD can be designed for vacuum operation where lower drying temperature is required. This is useful for heat-sensitive products or solvent removal applications.
What is the final output from an ATFD?
The final output can be dry powder, flakes, cake or solid residue depending on feed nature, drying duty, scraper design and discharge arrangement.
Key data includes feed flow rate, feed composition, solids percentage, viscosity, moisture content, final moisture target, boiling point, solvent details, corrosive nature, operating hours and upstream evaporation system details.
Yes. Shachi can design ATFD as part of an integrated ZLD system with evaporators, crystallizers, condensers, vacuum systems, automation and downstream solid handling.
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