Evaporation


Evaporation is the process of vaporization of solvent from solution in order to increase the concentration of the solute. Evaporation is extensively energy intensive unit operation.

ECOVAP* ECOVAP* is the environment friendly, energy efficient range of evaporators.
Praj offers a range of solutions which includes :
  • Falling Film Evaporators
  • Forced Circulation Evaporators
  • Special Falling Film Evaporators
  • Thin Film Evaporators
  • Patented Fluidized Bed Evaporators

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Combination of Evaporation :

Multi Effect Evaporation Plant :

Multiple Effect Evaporator is an apparatus for efficiently using the heat from steam to evaporate water to concentrate dissolved salts in the water.

In Multiple effects Evaporator, water is boiled in sequence of vessels, each held at lower pressure than the last. As boiling of water decreases with pressure, Vapor produced in one vessel can be used to heat the next vessel.

Only first vessel requires the source of external heat.

Advantages :
  • Ease of operation
  • Most proven system for Evaporation

Multi effect Evaporation Using Thermal Vapor Recompression (TVR):

  • Steam Jet Ejector is used to raise the temperature and pressure of generated vapors from respectice effect of evaporator.
  • The motive steam mixes with the part of vapors generated from respective effect of evaporator.
  • Resultant vapors (motive steam + part of vapors from respective Effect) are utilized for effect of condensation.
  • It increases overall energy efficiency of multiple effects Evaporation Plant.

Advantage Praj :
  • Highly Energy Efficient System.

Evaporation with Mechanical Vapor Recompression :

It is the most energy efficient System for Evaporation. This system requires theoretically zero Steam and Cooling Water during steady operation.

Mechanical Vapor Recompression system can work with any kind of evaporator like Falling Film Evaporator, Forced Circulation Evaporator or Plastic Evaporator.


Advantages :
  • Low Energy Consumption
  • Higher Performance Coefficient
  • Reduced load on cooling tower
  • Simplicity of Process, Operation and Maintenance

Typical MVR Evaporator :

  • Falling Film Evaporator

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