煤化工废水高盐反渗透浓水纳滤分盐的运行特性  

Operation characteristics of salt separation of high-salt RO concentrated water of coal chemical wastewater by nanofiltration

作　　者：安景辉 栾金义[2] 冯吉飞 AN Jinghui;LUAN Jinyi;FENG Jifei(Sinopec Engineering Incorporation,Beijing 100101,China;Sinopec Beijing Research Institute of Chemical Industry,Beijing 100013,China;Zhong An United Coal Chemical Co.Ltd.,Huainan 232090,China)

机构地区：[1]中国石化工程建设有限公司,北京100101 [2]中国石化北京化工研究院,北京100013 [3]中安联合煤化有限责任公司,安徽淮南232090

出　　处：《化工环保》2022年第2期237-242,共6页Environmental Protection of Chemical Industry

摘　　要：采用纳滤(NF)分盐工艺处理煤化工废水“零排放”过程中产生的高浓度含盐反渗透浓水(高盐RO浓水)。运行结果表明:NF的平均水回收率为58.5%;SO_(4)^(2-),Cl^(-),NO_(3)^(-)及F^(-)的平均截留率分别为98.7%,27.3%,55.8%,74.3%;Cl^(-)分离比为2.03,NF浓水侧存在相当浓度的Cl^(-);NF水回收率与Cl^(-)、F^(-)的截留率均呈线性负相关关系。因此,通过提高NF水回收率可有效降低一价阴离子的截留率,提高Cl^(-)分离比,简化下游水处理中的结晶流程。In order to achieve“zero discharge”of wastewater in coal chemical industry,nanofiltration(NF)process was used for salt separation of reverse osmosis concentrated water with high salinity(high-salt RO concentrated water).The operation results indicate that:The average water recovery rate is 58.5%;The average rejection rates of SO_(4)^(2-),Cl^(-),NO_(3)^(-),F^(-)are 98.7%,27.3%,55.8%and 74.3%respectively;The separation ratio of Cl^(-)is 2.03,and there is a considerable concentration of Cl^(-)on the concentrated water side of NF;The NF water recovery rate follows inverse linear relationships with both of the rejection rate of Cl^(-)and F^(-).Therefore,by increasing the water recovery rate of NF,the rejection rate of monovalent anions may be reduced and the separation ratio of Cl^(-)may be increased,and then the downstream crystallization process will be simplifed.

关 键 词：煤化工废水 高盐反渗透浓水 分盐 纳滤 截留率 水回收率 

分 类 号：X703[环境科学与工程—环境工程]