公开(公告)号：US20100032375A1

公开(公告)日：2010-02-11

申请号：US12536303

申请日：2009-08-05

申请人： Venkataraman Jagannathan ,  Ravi Chidambaran ,  Manoj Sharma

发明人： Venkataraman Jagannathan ,  Ravi Chidambaran ,  Manoj Sharma

IPC分类号： C02F1/44 ,  C02F5/02 ,  C02F1/66

CPC分类号： C02F1/441 ,  C02F1/001 ,  C02F1/52 ,  C02F1/66 ,  C02F1/76 ,  C02F5/02 ,  C02F2103/023

摘要： Disclosed is a high-recovery integrated recycling process to treat water and waste water having high hardness, silica, and other contaminants to facilitate operation of a reverse osmosis (RO) membrane at very high overall recovery when treating waste water containing high concentration of sparingly soluble inorganic salts like hardness, silica, and other components such as silica, etc. The RO membrane continuously operates in low or conservative recovery conditions, but can still achieve a very high overall system recovery. The process includes precipitation softening in a softening clarifier where the scale forming salts are reduced followed by filtration and reverse osmosis. The precipitated salts are removed as underflow from the clarifier. The softened or partially softened water is then filtered by a conventional filtration system, for example by a media filter. This is then fed to a reverse osmosis membrane unit that is designed to operate at an appropriate recovery to avoid scaling and fouling. Normally the recovery can be maintained quite low, for example at 50 to 60% of the feed flow.

摘要翻译： 公开了一种高回收率综合回收方法，用于处理具有高硬度，二氧化硅和其他污染物的水和废水，以便在处理含高浓度微溶性废水时，以非常高的总体回收率进行反渗透（RO）膜的操作 无机盐如硬度，二氧化硅和其他组分如二氧化硅等.RN膜在低或保守的回收条件下连续运行，但仍可实现非常高的总体系统回收率。 该方法包括软化澄清剂中的沉淀软化，其中垢形成盐被还原，然后过滤和反渗透。 沉淀的盐从澄清池中下溢出去除。 然后通过常规的过滤系统例如通过介质过滤器过滤软化或部分软化的水。 然后将其送入反渗透膜单元，反渗透膜单元被设计成在适当的回收下操作以避免结垢和结垢。 通常，回收率可以维持相当低，例如进料流量的50％至60％。