Tube falling film evaporator


Tube falling film evaporators are used in many standard applications and smaller evaporation capacities than plate falling film evaporators.

Especially the droplet separation and the cleaning of the apparatus play an essential role here.

We bring our years of experience and specialized knowledge of the most individual challenges in the planning and production of this type of evaporator with a.

  • Can be used from smallest evaporation capacities
  • Often used in various industries and good experience
  • Several evaporator stages are possible in one apparatus
  • Low circulating pump power necessary
  • Little space needed
  • Recovery of solvents & alcohols
  • Separation of water, solvents, alcohols and much more.
  • Recovery of recyclables
  • Volume reduction of liquid-liquid mixtures
  • Separation of multicomponent mixtures
  • Concentration of starch products and derivatives in the starch industry
  • Concentration of spent liquor in the pulp industry

Model & Function Principle

In the tubular falling film evaporator, the medium is internally guided through the externally heated tubes which act as a heating surface to concentrate and evaporate it. The distribution cup assures uniform loading of all tubes. The circulation pump and the recirculation conveyed conveyed the medium in a circle and is thus further evaporated. Evaporation of the more volatile liquid at the heating surface produces vapor vapor, which is conveyed downwards through the tube bundle in cocurrent with the concentrate. Subsequently, the vapor phase is separated from the liquid phase while the broth steam still has to be separated by means of a droplet separator of entrained droplets of the medium.

One possibility is to realize this by means of cyclone separators, where different solutions are conceivable. The Brüdendampf can then be used to heat the tube bundle by the steam inlet of the next evaporation stage in a multi-stage evaporation or by mechanical vapor compression (MBV) or thermal vapor recompression (TBV) in the same evaporator stage for heating the tube bundles. The condensed Brüdendampf (condensate) on the shell side of the tubes is last discharged through a condensate outlet at the bottom of the tube bundle. On the other hand, the concentrate is drawn off at the lower end of the vaporizer body and directed to the next vaporizer stage or the next process step.