铜冶炼车间回用水分盐中试试验研究
Pilot test and research of desalination in recycle water in copper smelting workshop
刘永丰 1蒋国民 1朱赞强 2颜鲜林 2桂俊峰 3刘锐利3
作者信息
- 1. 赛恩斯环保股份有限公司,长沙 410000;有色重金属污染治理装备湖南省工程实验室,长沙 410000
- 2. 赛恩斯环保股份有限公司,长沙 410000;有色行业污染治理与装备工程技术研究中心,长沙 410000
- 3. 赛恩斯环保股份有限公司,长沙 410000
- 折叠
摘要
为实现废水的近零排放和资源化处理,采用"生物制剂与双碱法协同脱钙+反渗透装置浓缩+纳滤装置分盐+电渗析装置浓缩+蒸发结晶装置出盐"工艺处理某铜冶炼车间回用水.结果表明,SO42-截留率＞99％,Na2SO4浓水溶解性总固体(TDS)质量浓度达179 g/L,NaCl浓水TDS质量浓度达150 g/L,浓缩液蒸发结晶后得到Na2SO4与NaCl产品盐.Na2SO4达到GB/T 6009-2014《工业无水硫酸钠》二类合格品要求,NaCl满足GB/T 5462-2015《工业盐质量标准》中一级标准.解决了回用水浓水浓度低、Na2SO4产品为杂盐等问题,为有色行业经济高效地处理高含盐废水奠定了工程化基础.
Abstract
In order to realize Near Zero Emission and resource utilization in wastewater treatment,the reuse water from a copper smelting workshop was treated using a process involving biological agents,double alkali decalcification,reverse osmosis concentration,nanofiltration salt separation,electrodialysis concentration,and evaporation crystallization salt removal.The experimental result shows that the retention rate of SO42-reaches＞99％,the total soluble solids(TDS)of Na2SO4 in concentrated water reaches 179 g/L,and the TDS of NaCl in concentrated water can reach 150 g/L.After concentration and separation,Na2SO4 and NaCl salt product are precipitated,and Na2SO4 meets the requirements of Class Ⅱqualified product defined in GB/T 6009-2014 Industrial Anhydrous Sodium Sulfate,and NaCl meets the Class Ⅰ standard defined in GB/T 5462-2015 Industrial Salt Quality Standard.This process solves the problem of low concentration in recycled concentrated water and removes the impurities in Na2SO4 products,providing bases for the cost-effective engineering treatment of high salty wastewater in the non-ferrous industry.
关键词
铜冶炼厂/回用水/纳滤分盐Key words
copper smelter/reuse water/salt separation with NF引用本文复制引用
基金项目
湖南省环保科研课题(HBKT-2022013)
出版年
2024
NETL
NSTL
维普
万方数据