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    • 24. 发明公开
    • METHOD AND APPARATUS FOR REMOVING ION IN FLUID BY CRYSTALLIZATION
    • VERFAHREN UND VORRICHTUNG ZUR IONENENTFERNUNG AUS EINERFLÜSSIGKEITMITTELS KRISTALLISIERUNG
    • EP1593417A1
    • 2005-11-09
    • EP04703501.9
    • 2004-01-20
    • EBARA CORPORATION
    • SHIMAMURA, KazuakiTANAKA, Toshihiro, Central Wing West 1011,
    • B01D9/02C01B25/45C01B25/32C01F11/22C02F1/58
    • B01D9/005C01B25/00C02F1/38C02F1/52C02F1/5254C02F2101/10C02F2101/105C02F2101/14C02F2301/026
    • It is an object of the present invention to improve the phosphorus recovery rate in a method and apparatus for removing ions to be removed in a liquid to be treated by crystallizing out crystal particles of a poorly soluble salt of the ions to be removed in the liquid to be treated in a crystallization reaction tank. As one means for attaining this object, in one embodiment of the present invention there is provided a method for removing ions to be removed in a liquid to be treated by crystallizing out crystal particles of a poorly soluble salt of the ions to be removed in the liquid to be treated in a crystallization reaction tank, which comprises adding a chemical agent required for the crystallization reaction into a part of a treated liquid flowing out from the crystallization reaction tank and dissolving the chemical agent therein, and supplying the resulting solution into the crystallization reaction tank as a circulating liquid, wherein the liquid to be treated and the circulating liquid are introduced into the crystallization reaction tank tangentially to a transverse section of the crystallization reaction tank.
    • 本发明的目的是提高在待处理液体中除去要除去的离子的方法和装置中的磷回收率,该方法和装置通过在液体中析出待除去的离子的难溶性盐的结晶颗粒, 在结晶反应槽中处理。 作为实现该目的的手段之一,在本发明的一个实施方案中,提供了一种通过在待分离的液体中结晶待除去的离子的难溶性盐的结晶颗粒来除去待处理液体中待除去的离子的方法 在结晶反应槽中处理的液体,其包括将结晶反应所需的化学试剂加入到从结晶反应罐中流出的处理液的一部分中并将其中的化学试剂溶解,并将所得溶液供给到结晶 反应罐作为循环液体,其中待处理液体和循环液体与结晶反应罐的横截面切向地引入结晶反应罐中。