Purification/desalination system for producing water for household use from saline raw water, has fine desalination unit for receiving utility water or recirculated consumed utility or drinking water from final user

摘要

A purification/desalination system comprises fine desalination unit(s) for receiving either utility water which has passed through a pre-desalination unit or recirculated consumed utility water or drinking water from final users. The system also includes pre-desalination unit(s) and conduits. A purification/desalination system consists of pre-desalination unit(s) (4) for producing utility water having salt content X from saline raw water having original salt content U; fine desalination unit(s) (8) for producing drinking water having maximum salt content Y from utility water; and conduits (2, 3, 5, 7) for transporting raw water from raw water source (1) to pre-desalination unit, for transporting utility water to fine desalination unit, and for transporting utility water and drinking water, respectively, to final user (6, 9). The water fed into the fine desalination unit is either utility water, which has passed through a pre-desalination unit or recirculated consumed utility water or drinking water from final users. X is lower than U but higher than Y.