组合纳滤在煤化工废水分盐改造中的工程应用研究
Research on engineering application of combined nanofiltration in salt separation transformation of coal chemical wastewater
赵鹏飞 1张彦海 2李超 2张波 2俞彬2
作者信息
- 1. 博天环境集团股份有限公司,北京 100082;榆林市博华水务有限公司,陕西 榆林 719099
- 2. 博天环境集团股份有限公司,北京 100082
- 折叠
摘要
为实现结晶盐资源化,对某煤化工零排放项目采用组合纳滤技术+重结晶工艺进行改造.结果表明,组合纳滤可有效实现分盐及浓缩功能,当进水中Cl-/SO42-=0.37～0.98 时,组合纳滤产水Cl-/SO42-=30.7～298.5(均值 117.9),浓水中Cl-/SO42-=0.09～0.28(均值0.15),浓水中SO42-浓度可达 80 000 mg/L以上,截留率>99%,Cl-平均截留率为-18.9%;产出合格NaCl及Na2SO4结晶盐,纯度均在98.5%以上,有效地实现了混盐资源化.
Abstract
In response to the current situation of mixed salt production in a zero emission coal chemical project,in order to achieve the re-utilization of crystalline salt,a combined nanofiltration technology and recrystallization process is employed to renovate the original project.The results show that the combined nanofiltration process can effectively achieve salt separation and concentration functions.When Cl-/SO42-=0.37-0.98 in the inlet water,the combined nanofiltration process generates water with a Cl-/SO42-ratio of 30.7-298.5(mean value 117.9),and a concentrated water with a Cl-/SO42-ratio of 0.09-0.28(mean value0.15)and a SO42-concentration of 80 000 mg·L-1.The retention exceeds 99%,and the average retention rate of Cl-is-18.9%.The qualified NaCl and Na2 SO4 crystalline salts with a purity over 98.5%are generated,effectively achieving the re-utilization of mixed salt.
关键词
组合纳滤/煤化工/混盐/分盐/资源化Key words
combined nanofiltration/coal chemical industry/mixed salt/salt separation/re-utilization引用本文复制引用
出版年
2024
NETL
NSTL
万方数据