Falling film evaporator
The initial solution is fed to the upper part of the heating chamber and distributed through the pipes using a special device, forming a thin film that evenly moistens their surface.
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Advantages:
Compact design that allows the use of devices with a high heat exchange surface
Short contact time at low temperature differences-ideal for heat-sensitive products
Able to work with high-viscosity solutions
Low hydraulic resistance, the possibility of creating a deep vacuum and excellent heat transfer conditions are one of the most energy-efficient solutions.
Scope of application:
Most salt and acid solutions, including low concentrated and heat sensitive
Viscous solutions
Foaming products
Organic solvents and oils
Food and pharmaceutical products
Wastewater treatment
Process principle:
Under the action of gravity, the film flows down, gradually heating up.
After reaching the boiling point, an intense vapor release begins, additionally entraining the film and causing turbulence of its surface, thereby increasing the heat exchange efficiency.
In the separator, vapors and liquid are separated and drained from the apparatus.
Due to the better conditions of film formation and heat transfer compared to rising film evaporators, these devices are suitable for operation even at small temperature differences between the solution and the heating medium.
