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1.发明申请
公开(公告)号：WO2016041887A1
公开(公告)日：2016-03-24
申请号：PCT/EP2015/070917
申请日：2015-09-14
Inventor： GRANGE, Didier , COSTE, M. , BARBIER, E.
IPC: B01D61/00 , C02F1/28 , C02F5/06 , C02F1/44 , C02F1/52 , C02F1/66 , C02F5/14 , C02F11/12 , C02F101/10 , C02F101/20 , C02F103/10 , C02F103/16
CPC classification number: C02F1/66 , B01D61/022 , B01D61/025 , B01D61/027 , B01D2317/025 , C02F1/281 , C02F1/441 , C02F1/442 , C02F1/445 , C02F1/4693 , C02F5/06 , C02F5/14 , C02F11/12 , C02F2001/5218 , C02F2101/006 , C02F2101/101 , C02F2101/105 , C02F2101/108 , C02F2101/20 , C02F2101/303 , C02F2103/10 , C02F2103/16 , C02F2209/06 , C02F2209/10 , C02F2301/024 , C02F2301/028 , C02F2303/18 , C02F2303/22
Abstract: The present invention relates to a method for treating an aqueous liquid effluent containing calcium and carbonate ions and containing precipitation-inhibiting products, said process comprising the following successive steps: a) providing an aqueous liquid effluent supersaturated with CaCO 3 and containing precipitation-inhibiting products; b) having the effluent obtained in step a) pass into a reactor with high solid content with a solid content maintained between 20 and 800 g/l and integrated solid-liquid separation, at a pH comprised between 8 and 9.2 allowing in a single step precipitation in situ of the aragonite polymorph of calcium carbonate and removal of the precipitation-inhibiting products; c) recovering an aqueous liquid supernatant containing a suspended solids content of less than or equal to 0.1% by mass of the solid content in the reactor, advantageously a suspended solids content of less than 50 mg/l, the precipitation-inhibiting products being phosphonates.
Abstract translation: 本发明涉及一种处理含有钙和碳酸根离子并含有沉淀抑制产物的含水液体流出物的方法，所述方法包括以下连续步骤：a）提供用CaCO 3过饱和的含水液体流出物并含有沉淀抑制产物; b）使步骤a）中获得的流出物通入固体含量高的反应器，其固体含量保持在20至800g / l之间，并且在8至9.2的pH下进行整合的固液分离，允许在单步 原位沉淀碳酸钙的文石多晶型物和去除沉淀抑制产物; c）回收含有悬浮固体含量小于或等于反应器中固体含量的0.1质量％的水性液体上清液，有利地为小于50mg / l的悬浮固体含量，沉淀抑制产物是膦酸盐 。
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