| 摘要 |
1,268,697. Evaporators, flash type; desalination of water. SIEMENS A.G. 1 Aug., 1969 [17 Aug., 1968], No. 38798/69. Heading BIB. Sea water or brackish water is heated and then pumped through a tangential inlet 5 into a horizontally-disposed, cylindrical chamber 3 so that a water-ring 8 is formed therein, the inner surface of the ring is maintained at subatmospheric pressure whereby water evaporates from the surface, and the vapour flows out through pipes 6 to a condenser to form fresh water. Non-evaporated sea water flows out of chamber 3 through slots 4, and is withdrawn from chamber 1 through outlet 7. A vacuum pump may be connected to the condenser in order to remove gas. The sea water may be heated by using it as coolant in the condenser. The evaporator may be associated with a steam power plant using fossil or nuclear fuel, steam from a turbine being condensed by heatexchange with sea water to be supplied to the evaporator. Some of the non-evaporated water leaving the evaporator may be used as coolant in the condenser of a turbine, and then returned, mixed with additional sea water, to the evaporator. |
