Water Solutions for Better Green Environment!!

FALLING FILM EVAPORATORS

EVAPORATOR TYPES

DESIGN

Vertical shell-and-tube heat exchanger, with laterally or concentrically arranged centrifugal separator.

OPERATION

The liquid to the concentrated is supplied to the to the top of the heating tubes and distributed in such a way as to flow down the inside of the tube walls as a thin film. The liquid film starts to boil due to the external heating of the tubes and is partially evaporated as a result. The downward flow, caused initially by gravity, is enhanced by the parallel,downword flow of the vapor format. Residual film liquid and vapor is separated in the lower part of the calendria and in the downstream centrifugal droplet separator. It is essential that the entire film heating surface, especially in the lower regions, be evenly and sufficiently wetted with liquid. Where this is not the case, dry spots will result that will lead to incrustation and the build of deposits. For complete wetting it is important that a suitable distribution system is selected for a head of the evaporator. Wetting rates are increased by using longer heating tubes, dividing the evaporator into several compartments or by recirculation the product.

PARTICULAR FEATURES

  • BEST PRODUCT QUALITY- due to gentle evaporation, mostly under vacuum, and extremely short residence times in the evaporator.

  • HIGH ENERGY EFFICIENCY- due to multiple effect arrangement or heating by terminal or mechanical vapor recompressor,based upon the lowest theoretical temperature difference.

  • SIMPLE PROCESS CONTROL AND AUTOMATION- due to their small liquid content falling film evaporators react quickly to changes in the energy supply,vaccume,feet quantities, concentration etc...This is an important prerequisite for a uniform final concentrate.

  • FLEXIBLE OPERATION- quick startup and easy switch over from operation to cleaning, uncomplicated changes of product.


FIELDS OF APPLICATION

  • Capacity ranges of up to 150 t/hr, relatively small floor space requirement.

  • Particularly suited for temperature-sensitive products.

  • For liquids which contain small quality of solids and have a low to moderate tendency to form incrustations.

 

We are at

Srivaari Plaza,
2nd floor,
Besides Andhra Bank,
Near HP Gas Station,
Moula Ali,
Hyderabad-500040.
+91-9553777145 /8184804073
Email : yatin@jalengg.com
            info@jalengg.com

 

 

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