Multi Stage Flash

Product Info

MSF (Multi Stage Flash)

In the Multi-Stage Flash (MSF) process seawater is heated and evaporated, after which the steam is condensed to produce desalinated water. The water vapor being condensed is used as a thermal energy source to heat incoming seawater.

Evaporation and condensation is split into many stages that are repeated several times, thereby increasing overall efficiency. One of the good features of the MSF process is its ability to produce large amounts of water at a time. Since it uses the low temperature/pressure evaporator as a thermal energy source, while also making desalination possible with waste heat from the power plant, the MSF type is generally employed when building desalination plants in the Middle East.

MED (Multi Effect Distillation)

Some of the feedwater is flash evaporated, but most of the seawater is dispersed over an evaporator tube bundle and boiled. Steam then condenses to produce fresh water, and this process is continuously repeated. Since the evaporation takes place in a vacuum, the sprayed seawater is able to reach boiling point even at low temperatures. Since MED uses a progression of stages with ever-dwindling temperatures (at 60~70C), it`s comparatively smaller than MSF in terms of output, but boasts higher heat efficiency and more economical operation.