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To remove the salt from something, especially from seawater for use in a domestic water supply

Reverse osmosis desalination plant in Barcelona, Spain

To remove the salt from something, especially from seawater for use in a domestic water supply

Schematic of a multistage flash desalinator A – steam in B – seawater in C – potable water out D – brine out (waste) E – condensate out F – heat exchange G – condensation collection (desalinated water) H – brine heater The pressure vessel acts as a countercurrent heat exchanger. A vacuum pump lowers the pressure in the vessel to facilitate the evaporation of the heated seawater (brine) which enters the vessel from the right side (darker shades indicate lower temperature). The steam condenses on the pipes on top of the vessel in which the fresh sea water moves from the left to the right.

To remove the salt from something, especially from seawater for use in a domestic water supply

Schematic representation of a typical desalination plant using reverse osmosis. Hybrid desalination plants using liquid nitrogen freeze thaw in conjunction with reverse osmosis have been found to improve efficiency.