Falling Film Evaporator

Falling Film Evaporator

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Industrial Evaporators, Falling-Film Evaporator :-

Equipped with shell and tube exchangers, Falling Film Evaporator are used for vaporization of substances that take minimal time to respond during high temperature environment and those substances that leave remainders after completion of polymerization or vaporization. Falling film evaporator are perfect choice for dissipation of heat sensitive substance which has low density range that is similar to thickness of water.

Minimal temperature variation between the boiling liquid and the heating medium is utilized for the functioning of Falling Film Evaporator. These film evaporators are featured with a few seconds of contact time for every pass. The above mentioned attributes have made the Falling Film Evaporator ideal for items with high sensitivity to heat and at present, this item has wider applications when compared to their counter parts.

Falling film evaporator have been specially developed by keeping various working conditions in mind. The heating surface need to be saturated properly by liquid for smooth functioning of the plant. In case the heating surface is not soaked properly, then layer and stain mark will appear. To make matters worse, the heating tubes will be totally blocked. Therefore, minimal flow of liquid is required to manage this situation.

Precise design of the liquid distribution system is required for complete as well as uniform soaking of the tubes. 'SIPPL' has wide recognition in this arena. The low liquid holding capacity of this film evaporator contributes to its trouble free starting and simplifies its operation mode changing function.

Vapors and liquid in falling film evaporator move to downwards in parallel direction. The liquid should be preheated to boiling temperature if it need to be condensed. A uniform layer of thin film penetrates into the heating tubes through a distribution system located on the top part of the evaporator. This film moves downward direction at boiling temperature and it is partly vaporized.

The liquid that need to be vaporized is uniformly dispersed on the internal surface of a glass tube. The liquid will move towards lower area and will form a thin layer. The layer will results in vaporization or boiling due to application of the heat by the steam. The steam will concentrate and move downward direction on the exterior part of the glass tube. Each of the end of these tubes are attached with tube plates and the bundles of tubes is encased by a glass or steel made shell. The enclosure material will be decided as per the condition of the process. The steam enters into the shell. The available space between the two tubes has thus transformed into the heating section. The interior part of the glass tubes is referred as the boiling section. The condensed liquid and the mist disappears form the bottom portion of the evaporator and infiltrate into the separator part in diverging form from where the condensed liquid was discharged ( generally by pumping) from the bottom part and vapor emits from the top part of the separator.


  • Water proof graphite tubes
  • Expansion vessels made of glass
  • Available with instrumented design

Other Details of Falling-Film Evaporator :-

  • Minimum Order Quantity: 1 Set

  • Approx. Price: Rs 1.5 Lakh / Set 426 

Technical Specifications of Falling-Film Evaporator :-

Model RE2000 RE2000B RE2000E RE3000 RE3000B RE3000E
Rotary flask(L) 0.5-2 0.5-2 0.5-2 3 3 3
Collection Flask(L) 1 1 1 2 2 2
Evaporating Speed (H2O) >1.5L/h >2.5L/h
Motor power(W) 40 60
Rotating speed(rpm) 0-199
Water bath power(KW) 2
Power supply 220V/ 50-60HZ (Optional 110V)
Bath Temp control range Room Temp. ~ 199°C
Sealing parts Main PTFE Seal, Oil ring and O ring
Vacuum degree <133Pa