PIGNAT Double Effect Evaporator – EVV2000


SKU: EVV2000 Category: Tags: ,


The evaporation
The purpose of evaporation is to vaporize the solvent in order to enrich the solute in the solution. At the end of the operation the substance recovered is known as the concentrate. A conventional evaporator is heated by steam which condenses and transmits heat energy to the solution to be evaporated. As this solution boils it in turn releases vapor which may:

  • Either be condensed in a condenser, in which case the process is known as “single effect” evaporation.
  • Or be used to heat another evaporator, in which case it is known as “multiple effect”.

In theory an unlimited number of evaporators may be associated in series in this way. In industry evaporation is used to :

  • Obtain crystallized sugar, concentrated milk, concentrated fruit juices, paper pulp.
Continuous concentration by double effect evaporation using 2 levels of pressure:
  • 1st stage at atmospheric pressure
  • 2nd stage under vacuum

Observe the steps of the process

  • Evaporation and climbing phenomenon
  • Separation of a liquid-vapour mixture in a cyclone
  • Condensation
Choose operating conditions and study their influence on the process
  • Reduced or atmospheric pressure
  • Feed rate and steam flow rate
  • Single or double effect
Monitor the process
  • Thermal and material balance
  • Yield

General Specifications

  • 50 L feeding tank.
  • Metering pump.
  • Glass shell evaporator, internal SS tube.
  • SS refrigerant
  • Glass cyclone.
  • Solenoid valve.
  • 2 glass shell evaporator, internal SS tube.
  • Glass cyclone for vapor separation.
  • 10 L glass graduated receiver with draining valve and vacuum connection.
  • Diaphragm vacuum pump, diaphragm PTFE.


  • Temperature probes Pt100Ω.
  • Flowmeter.
  • Vacuum gauge.
  • Manometer.
  • Level sensor

For a complete product data sheet and a list of reference sites please call 1-877-967-2726.