Seawater desalinator

evaporativeprocesschemical

ENTROPIE can offer sea water desalination systems based on either of the leading technologies depending on fresh water need ENTROPIE is the world leading specialist in sea water desalination through low temperature distillation processes such as : • Multiple Effect Distillation (MED) • Multiple Effect Distillation with Thermal Vapour Compression (MED-TVC) • Multiple Effect Distillation with Mechanical Vapour Compression (MED-MVC) A Multi Effect Desalination MED unit is an evaporator where sea water is evaporated in one or more ( up to 14 ) evaporation stages at low temperature (< 70°C ) in order to produce clean distillate water. MED process is designed to produce distilled water with steam or waste heat from power production or chemical processes, and/or to produce potable water. • This Scheme represents a Multiple Effect Distillation unit consisting of 3 cells • In the last cell the produced steam is condensed on a conventional shell and tubes heat exchanger (distillate condenser) cooled by sea water. • At the outlet of the condenser, part of the warmed sea water is used as make-up of the unit, and part rejected to the sea. Brine and distillate are collected from cell to cell till the last one from where they are extracted by centrifugal pumps • The thermal efficiency of a unit is quantified by the Gain Output Ratio (GOR) defined as the quantity of distillate produced per unit of heating steam used The technology An MED evaporator consists of several consecutive cells (or effects) maintained at decreasing levels of pressure (and temperature) from the first (hot) cell to the last one (cold). Each cell mainly consists of a horizontal tubes bundle.