| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for removing ions in a liquid by a crystallization method, capable of precipitating hardly soluble crystals having a uniform particle size to obtain a stable removing capacity and capable of miniaturizing an apparatus for removing ions in the liquid by the crystallization method, and the apparatus for removing ions in the liquid by the crystallization method. SOLUTION: In the method for removing ions to be removed in a liquid to be treated by crystallization reaction, the liquid to be treated and a liquid containing ions reacting with the ions to be removed and/or a part of a treated liquid are respectively supplied to two or more crystallization reaction tanks to be subjected to crystallization reaction in the respective tanks. At this time, crystal nuclei are added to the first reaction tank to be grown and the grown crystal nuclei are successively transferred to the rear stage reaction tank and drawn out of the final stage reaction tank to be recovered. In this case, the supply amount of the liquid to be treated is made much toward the rear stage reaction tank and the transfer and draw-out of the crystal nuclei can be performed by an air lift means. COPYRIGHT: (C)2003,JPO
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