公开(公告)号：US20170057854A1

公开(公告)日：2017-03-02

申请号：US14841980

申请日：2015-09-01

申请人： PEPSICO, INC.

发明人： Jim Tsungyeh Yu ,  Eric Jon Willman ,  Arun Sathyagal

IPC分类号： C02F9/00 ,  B01D15/36 ,  B01D61/14 ,  B01D61/36 ,  B01D15/20 ,  B01D61/58

CPC分类号： C02F9/00 ,  B01D15/203 ,  B01D15/362 ,  B01D61/145 ,  B01D61/364 ,  B01D61/58 ,  B01D2311/04 ,  B01D2311/2623 ,  B01D2311/2642 ,  B01D2311/2649 ,  C02F1/001 ,  C02F1/42 ,  C02F1/444 ,  C02F1/447 ,  C02F1/5281 ,  C02F1/66 ,  C02F2001/425 ,  C02F2001/5218 ,  C02F2301/046 ,  C02F2303/16 ,  B01D2311/18

摘要： Method for treating effluent waste from a cation-exchange column regeneration cycle, including backwashing the column; regenerating the column using rinse water and a regenerant brine having a temperature warmer than room temperature, thereby forming a waste effluent containing divalent cations; precipitating the divalent cations in a precipitation reactor at a temperature warmer than room temperature; filtering the precipitation effluent; optionally, adjusting the filtered precipitation effluent pH; concentrating the filtered precipitation effluent via membrane-based water recovery, thereby forming separated concentrated salt and pure rinse water; and recirculating the separated concentrated salt and pure rinse water back to the column for a subsequent regeneration cycle. Also, a system including an exhausted cation-exchange column; a chemical precipitation reactor; a filtration unit; an optional pH adjustment unit; and a membrane-based water recovery unit, wherein the system is a closed-loop through which salt and rinse water having a temperature warmer than room temperature recirculate.

摘要翻译： 用于处理来自阳离子交换塔再生循环的流出物废物的方法，包括反冲洗柱; 使用漂洗水和温度比室温更高的再生剂盐水再生塔，从而形成含有二价阳离子的废液; 在温度高于室温的沉淀反应器中沉淀二价阳离子; 过滤沉淀物; 任选地，调节过滤的沉淀流出物pH; 通过基于膜的水回收浓缩过滤的沉淀流出物，从而形成分离的浓盐和纯冲洗水; 并将分离的浓缩盐和纯净的冲洗水再循环回塔，用于随后的再生循环。 此外，还包括一个包括排出的阳离子交换柱的系统; 化学沉淀反应堆; 过滤单元; 可选的pH调节单元; 和膜基水回收单元，其中该系统是一个闭环，具有比室温温度更高的温度的盐和漂洗水通过其循环。