METHOD FOR REFINING LIQUID

摘要

PROBLEM TO BE SOLVED: To provide a method for refining liquid, by which the refined liquid of the desired quality can be continuously withdrawn at the prescribed speed uninterruptedly while keeping in the respective fixed values or higher the removal ratio of an ionic material from an ionic material-containing liquid and the recovery ratio of the refined liquid after the ionic material is removed and which is usable on a commercial base. SOLUTION: This method for refining liquid comprises separating the ionic material- containing undiluted solution (L) into the refined liquid (L1) poor in ionic material content and a high concentration liquid (L2) rich in ionic material content by using a refining apparatus provided with liquid-passable condensers (1). The adsorption of the ionic material by an electrical charge and the desorption of the adsorbed ionic material by a short circuit or a counter electrical charge are carried out at the prescribed pattern by using three or more condensers (1) while interlocking with the connection among the condensers (1) and the switchover between introduction of the solution (L) and withdrawal of the liquids (L1 and L2) with respect to the respective condensers (1). As a result, the solution (L) is continuously refined at the prescribed flow speed and the liquid (L1) of the prescribed quality and the liquid (L2) are continuously withdrawn at the prescribed respective flow speeds.