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Agitated Thin Film Evaporators

Agitated Thin Film Evaporators

Raj Process Equipments and Systems Private Limited

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.