VTA Thin film dryers

Working principle of thin film dryers

A thin film dryer is a contact dryer where the heat is transferred from the cylindrical heating jacket into the product, while a rotor with special wiper elements increases the heat and mass transfer to finally obtain a dry and flowable solid.

The turbulence generated means that higher outputs can be achieved with shorter dwell times than in conventional drying systems.

Depending on the drying task and consistency of the product treated in the thin film dryer, vertical or horizontal arrangements are selected.

Design features

Vertical thin film dryers:

Short residence time during the drying process
Low operating pressures achievable to avoid degradation
Continuous process
High hear exchange rate due to the thin and turbulent product film
Available scales: laboratory, pilot, and industrial
Material of construction: stainless steel, special alloys

Horizontal thin film dryers:

Vapour discharge co- & counter current
Residence time adjustable
Drying of inhomogeneous and sticky products possible
High heat exchange rate due to thin and turbulent product film
Low operation pressures achievable
Available scales: laboratory, pilot, and industrial
Material of construction: stainless steel, special alloys, glass for R&D units

Technical details of VTA thin film dryers

Capacity	0.1 kg/h up to several t/h
Operating pressure	1 mbar to overpressure
Turn down ratio	Not limited
Heat exchange surface	0.04 m2- 40 m2
Residue discharge	Specialized for solid, free flowing materials
Little scaling on the heat exchange surface

Our specialists are here to advise on the optimal solution for your process. Our engineers will design a system for you according your specifications.

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