NOVELTY - Invention refers to the field of shipbuilding. The desalination installation mounted on board a ship is performed in three modifications: the first modification is the installation with two-stage evaporators, the second one - with two-stage evaporators and with a condenser group, the third one - with a one-stage evaporator (a steam raising facility). Each of the desalination installations contains an electricity production unit that is connected to the desalination installation in each specific case separately.    USE - Shipbuilding.    ADVANTAGE - Reduction of fuel consumption on the ship power station, improvement of the ecological situation. 6 cl, 5 dwg    DETAILED DESCRIPTION - nvention refers to the field of shipbuilding. The desalination installation mounted on board a ship is performed in three modifications: the first modification is the installation with two-stage evaporators, the second one - with two-stage evaporators and with a condenser group, the third one - with a one-stage evaporator (a steam raising facility). Each of the desalination installations contains an electricity production unit that is connected to the desalination installation in each specific case separately with the help of the inlet and outlet nipple piping, releasing valves etc. The desalination installation, for example, in its first modification includes two stages of evaporation. Each of them contains a separator and evaporator, condenser, pumps, piping, valves. Sea water is fed to evaporation with the help of the pump (9) to the evaporator housing (4) of the second stage (2). The steam that is cooled with the outside water goes to the condenser (5), then the condensed steam fills the gravity tank of the desalinated water (21), passes to the batch (18) where the fresh water is forwarded to the first evaporation stage through the fresh water channels. On this stage the condensate is re-evaporated. The steam gives up heat to the outside water in the evaporator (4) of the second stage (2), it is condensed thus forming the distillate that goes to the collecting tank. The saline solution that appears due to water evaporation on the stages goes to the gravity tank of the brine water (22) from the pumps (8), then to the membrane batch (18), passes through the brine water channels that alternate with the fresh water channels, then it is thrown overboard. Energy conversion of the salinity gradients takes place when the solutions pass through the batch channels (18) that are limited on one side with the anion exchange (20) and on the other -with the cation exchange membrane (19). The obtained power is taken from the end electrodes (34) thus ensuring operation of the auxiliary mechanisms of the desalination installation.