脱硫废水中镁离子资源化回收技术研究进展  

Research progress on magnesium ion resource recovery technology in flue-gas desulfurization wastewater

作　　者：段亚威 罗贵贤 钟振成 佟振伟 王靖宇 郝雨峰 熊日华 DUAN Ya-wei;LUO Gui-xian;ZHONG Zhen-cheng;TONG Zhen-wei;WANG Jing-yu;HAO Yu-feng;XIONG Ri-hua(National Institute of Clean and Low Carbon Energy,Beijing 102211,China;State Key Laboratory of Water Resource Protection and Utilization in Coal Mining,Beijing 100011,China;Guoneng Hebei Cangdong Power Generation Co.,Ltd.,Cangzhou 061003,China)

机构地区：[1]北京低碳清洁能源研究院,北京102211 [2]煤炭开采水资源保护与利用国家重点实验室,北京100011 [3]国能河北沧东发电有限责任公司,河北沧州061003

出　　处：《应用化工》2023年第6期1918-1921,1927,共5页Applied Chemical Industry

基　　金：国家能源集团科技创新资助项目(KJ9300000562)。

摘　　要：介绍了国内外脱硫废水中镁离子回收的各种工艺路线和应用现状,并对现有的镁离子资源化回收工艺进行对比,以及未来的发展方向进行展望。认为应根据脱硫废水水质、总含盐量,特别是废水中Mg^(2+)、Ca^(2+)、SO_(4)^(2-)和Cl^(-)的摩尔比例以及经济性多方面综合考虑,从废水中回收Mg(OH)_(2)或MgSO_(4)产品盐,不建议回收MgCl_(2)产品盐。Various process routes and application status of recovering magnesium ion from FGD wastewater at home and abroad were introduced,the existing recovery processes of magnesium ion were compared,and suggestions for its future development were given.It was suggested that Mg(OH)_(2) or MgSO_(4) salt should be recovered from FGD wastewater according to the water quality,total dissolved solids(TDS),especially the molar ratio of Mg^(2+),Ca^(2+),SO_(4)^(2-) and Cl^(-)in wastewater and economical efficiency,while the MgCl_(2) salt should not be recovered.

关 键 词：燃煤电厂 脱硫废水 预处理 镁盐 资源化 

分 类 号：TQ03[化学工程] TQ09[环境科学与工程—环境工程] X703