Mechanical
Vapour Compression Desalination System
1 Introduction:
The Vapor compression
distillation process is generally used for small to medium scale desalting
units. The heat for evaporating the water comes from the compression of vapor
rather than the direct exchange of heat from steam produced in a boiler. Method
use to condense vapor to produce enough heat to evaporate the incoming seawater
is mechanical compressor.
2 Mechanical and Thermal vapor compressor systems :
The mechanical compressor
creates a vacuum in the vessel and then compresses the vapor taken from the
vessel and condenses it inside a tube bundle. Seawater is sprayed on the
outside of the heated tube bundle where it boils and partially evaporates,
producing more water.
The mechanical vapor
compressor (MVC) system is most attractive as it is compact and does not
require an external heating source, but it does need highly skilled /trained
operators and also required periodic
