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Evaporators

Agitated Thin Film Evaporators (ATFE)

Ideal for heat-sensitive, high-viscosity, and fouling materials — converts liquids, slurries, and pastes to free-flowing solids in continuous, single-pass operation with self-cleaning heating surfaces.

Designed for product recovery and other severe service applications. This drying technology arises from years of experience in soap plant glycerine and inorganic salt recovery. Our precision centrifugally balanced blade design delivers higher efficiency — the balance and weighting cause the blade to ride truer and quieter on the film, giving higher product quality by heavily reducing entrainment. The advanced wiper geometry reduces splashing to a minimum, meaning the time between required wash cycles is at least three to four times longer than previously experienced. Wet product (30–50% w/w slurry) is conveyed by rotor blades along the heated wall in a thin film, normally several millimetres thick — continuously exposing every particle to the heated surface. Moisture levels from a few tenths of a percent up to 5%+ can be achieved. Widely used to convert liquids, slurries, and pastes to free-flowing solids in continuous, single-pass operation.

Agitated Thin Film Evaporators (ATFE)

SEMCO Process Equipment

Agitated Thin Film Evaporators (ATFE)

Technical Specifications & Features

  • Flexible through exchangeable rotor elements
  • Short residence time — minimal thermal degradation
  • Self-cleaning of heating surface
  • Low residual volatile in final powder
  • Superior mixing efficiency
  • Low energy consumption
  • Continuous, fully enclosed processing
  • High reliability and low maintenance
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Technical Publication

Mastering Agitated Thin Film Evaporators (ATFE): An Engineering Guide to High-Viscosity Thermal Separation

Published by SEMCO Process Engineering TeamMay 2026
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Support & Info

Technical Frequently Asked Questions

What is an Agitated Thin Film Evaporator (ATFE)?

An ATFE is a highly specialized thermal separation unit designed for continuously evaporating heat-sensitive, highly viscous, or fouling liquids. It uses a high-speed mechanical rotor to spread the liquid into a thin turbulent film along a heated wall.

How does ATFE differ from a standard falling film evaporator?

While standard evaporators rely on gravity, the ATFE uses mechanical agitation to constantly renew the liquid film. This drastically reduces residence time (often to just seconds) and prevents localized overheating, making it perfect for heat-sensitive products.

Where We Deploy

Typical Applications

Glycerine & inorganic salt recovery
Pharmaceutical concentrations
Food processing
Polymer processing
Essential oils & oleochemicals

Need a Custom Agitated Thin Film Evaporators (ATFE)?

Our engineers will design and fabricate the right solution for your specific process requirements.