| 摘要 |
PROBLEM TO BE SOLVED: To provide a fresh water generating apparatus and method which can generate fresh water for drinking and the like without discharging highly concentrated salt water generated in an evaporator. SOLUTION: The fresh water generating apparatus 1 comprises the evaporator 2 which generates concentrated salt water and condensed water by evaporating and concentrating sodium chloride-containing water to be treated, and condensing generated steam, a semipermeable membrane permeator 3 which is partitioned by a semipermeable membrane 3a permeating water, and has a concentrated salt water chamber 31 and a dilute water chamber 32 into which the concentrated salt water generated in the evaporator 2 and dilute water having a sodium chloride concentration lower than that of the concentrated salt water are introduced respectively, and a returning means 7 which returns concentrated salt water in the concentrated salt water chamber 31, diluted by water permeating from the dilute water chamber 32 through the semipermeable membrane 3a, to the evaporator 2 as water to be treated. COPYRIGHT: (C)2009,JPO&INPIT |
