Concept of Evaporation

Evaporation

  Evaporation is process in which liquid changes into gaseous state through the transfer of heat below boiling point.

  It may also  called as removal of solvant from the solution by boiling the liquor in suitable vessel, leaving a concentrated liquor residue in the vessel.

Factors affecting Evaporation

1.Temperture

2. Vapour pressure

3. Surface area

4. Moisture content

5. Time of Evaporation

6. Film and deposit

7. Density

Types of Evaporators

1. Evaporators with heating medium in jacket (Evaporating pan)

2. Vapour pressure Evaporates with tabular heating surface.

Steam Jacket kettle ( Evaporating pan)

Uses 

  Suitable for concentrating aq. Thermostable liquors.

Horizontal tube Evaporators

   

Uses

Cascara extract

Vertical tube Evaporators

Uses

Manufacturing of cascara extract, sugar,salt, caustic soda.

Rasing film Evaporators

Uses

Concentration of insulin,liver extract and vitamin.

Falling flim evapoEvapor

Uses

Concentration of yeasts, manufacturing of galetin, Extract tea and coffee.

Forced circulation Evaporators

Uses

Concentration of insulin and liver extract,Thermolabile substance.