| 摘要 |
PURPOSE:To efficiently produce high-purity water by using a disinfectant, a means for adding a pH regulator, the first reverse osmosis membrane separator, an activated carbon adsorption tower, the second reverse osmosis membrane separator, etc., to treat raw water. CONSTITUTION:A disinfectant and/or a pH regulator are added while raw water pretreated with activated carbon, etc., is supplied to a degasification tower 1 through a pipeline 11. The raw water is treated by the first reverse osmosis membrane separator 2. The permeated water is then treated with activated carbon in the activated carbon adsorption tower 3. The treated water is subsequently treated by the second reverse osmosis membrane separator 4. The permeated water of the reverse osmosis membrane separator 4 is taken out, and the concentrated water of the reverse osmosis membrane separator 4 is returned to the raw water supply system of the reverse osmosis membrane separator 2. Consequently, the troubles in the conventional water purifying device provided with an ion-exchange device are eliminated and high-purity water can be efficiently produced.
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