Patent ID: 6506284
Filing Date: 2003-01-14
Classification: C02F,Y02A,Y02W,Y10S

Abstract:
A reduced-pressure distillation system comprising:an impure water tank, a separating tank, a drainage tank, and a collecting tank, the impure water tank, the drainage tank, and the collecting tank each having an outside pressure communicating chamber, which makes contact with outside pressure, and a cell, which communicates with the outside pressure communicating chamber corresponding thereto and is sealed with respect to the outside pressure during operation of the reduced-pressure distillation system, the separating tank being sealed with respect to the outside pressure and having an evaporator provided therein; means for feeding impure water from the cell of the impure water tank to the evaporator of the separating tank, by using an effective head between a level of impure water stored in the impure water tank and a level of priming water supplied to the drainage tank; means for discharging remaining water in the evaporator to the cell of the drainage tank; means for collecting purified water stored in a bottom portion of the separating tank into the cell of the collecting tank, the purified water being obtained by evaporating the impure water by activation of the evaporator of the separating tank; means for communicating with the cells of the impure water tank, the drainage tank, and the collecting tank, respectively, through the separating tank; and means for carrying out evacuation within the separating tank to keep each of the cells in a pressure-reduced state.