高分离纳滤系统在煤化工高盐废水零排放中的应用  

APPLICATION OF HIGH SEPARATION NANOFILTRATION PROCESS IN ZERO DISCHARGE OF HIGH SALT WASTEWATER FROM COAL CHEMICAL INDUSTRY

作　　者：赛世杰 李买军[1] 党平 刘慧 张娜 黄霞 SAI Shi-jie;LI Mai-jun;DANG Ping;LIU Hui;ZHANG Na;HUANG Xia(Inner Mongolia Jiuke Kangrui Environmental Protection Technology Co.,Ltd,Ordos 017000,China;State Key Laboratory of Environment Simulation and Pollution Control,School of Environment,Tsinghua University,Beijing 100084,China)

机构地区：[1]内蒙古久科康瑞环保科技有限公司,内蒙古鄂尔多斯017000 [2]清华大学环境学院环境模拟与污染控制国家重点实验室,北京100084

出　　处：《环境工程》2021年第7期173-178,共6页Environmental Engineering

基　　金：内蒙古自治区科技计划项目(2020GG0295)。

摘　　要：提出了1种由3个纳滤子系统构成的高分离纳滤系统,开展了该纳滤系统在煤化工高盐废水零排放工程中的应用及效果分析。结果表明:纳滤系统的SO_(4)^(2-)和Cl^(-)平均截留率分别为99.7%和-13.7%,平均水回收率高达81.9%,对1、2价盐分离效果较好;纳滤系统和各子系统在连续运行中的水回收率和运行压力波动较小,系统运行稳定性较高;纳滤系统的COD、Ca^(2+)和Mg^(2+)平均截留率分别为47.6%、76.9%和86.0%,而纳滤1、2、3子系统的清洗频率分别仅为每月2.1,0,1.0次,表明系统具有较高的抗污染性能。工程应用表明,高分离纳滤系统在高盐废水零排放领域具有很好的应用前景。A high separation nanofiltration system consisting of 3 sub-nanofiltration systems was proposed and its effect in zero discharge project of high salt wastewater from coal chemical industry was analyzed.Results showed that the average rejection rates of SO_(4)^(2-)and Cl^(-)were 99.7%and-13.7%respectively,and the average water recovery rate was 81.9%,which indicated a good separation effect of monovalent and divalent salts.The fluctuation of water recovery rates and operating pressures of nanofiltration system and its subsystems in continuous operation were small,and the system operation stability was high.The average rejection rates of COD,Ca^(2+)and Mg^(2+)were 47.6%,76.9%and 86.0%respectively,while the cleaning frequencies were 2.1,0 and 1.0 times per month respectively,which indicated that the system had a high anti-fouling performance.The plant demonstrated that the high separation nanofiltration system had a promising prospect in the field of zero discharge of high salt wastewater.

关 键 词：纳滤 高盐废水 零排放 煤化工 截留率 

分 类 号：X784[环境科学与工程—环境工程]