Agitated Thin Film Evaporators

Agitated Thin Film Evaporators


Agitated Thin film or Wiped Film Evaporators are used to separate a mixture of liquids having different boiling points. It is also used to increase the concentration of liquids.

Principle of Operation:
The liquid feed is distributed on the heated wall of the evaporator to form a uniform thin film with the help of suitable configuration of blades. The volatile component or the component with lower boiling point gets evaporated and is vacuumed out of the evaporator, while the component with higher boiling point flows down the wall and is collected at the bottom. The vapors are passed through a condenser and collected separately.

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Model Surface
area (m2)
Diameter
(mm.) (D)
Total height
(mm) (H)
Motor
hp.
RE-5 0.5 250 2250 2
RE-10 1 350 2650 3
RE-30 3 450 3500 5
RE-50 5 600 4750 7.5
RE-75 7.5 700 5750 10
RE-100 10 800 6500 15
RE-150 15 950 7500 20
RE-200 20 1100 8000 25
RE-250 25 1350 8500 30
RE-350 35 1600 9500 40
RE-500 50 2000 11000 60

  • Heat transfer in thin film evaporator is very quick and efficient, thus demanding lower surface area and heat input as compared to other types of evaporator.
  • Due to high vacuum distillation and very short residence time the thin film evaporator are suitable for handling wide range of heat sensitive, high boiling and viscous feeds.
  • Due to low rotor speeds in the range of 100 to 150rpm, the horse power requirements are very low.
  • To reduce the pressure drop between the evaporator and condenser, the internal condensers can be provided to achieve short path distillation.
  • The thin film evaporators are designed to handle various products with operating pressures up to O.1torr.
  • Liquids with viscosities above 2,00,000cps can be handled in these evaporators.

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