锌回转窑处理浸出渣过程汞排放特征研究
发布时间：2019-03-09 14:22
【摘要】：对3家锌冶炼回转窑处理浸出渣过程的汞排放特征测试发现,该过程是锌冶炼行业大气汞排放的重要节点.测试冶炼厂浸出渣和燃料在回转窑中的释放率为80.3%~99.3%.烟气除尘过程的脱汞效率为2.3%~7.9%.多膛炉脱氟氯过程的烟尘高温焙烧导致回转窑除尘过程的净脱汞效率大大降低.烟气脱硫系统的脱汞效率为19.0%~58.0%.回转窑尾气的汞排放量,约占浸出渣处理过程总输出汞量的41.6%~87.1%.测试冶炼厂回转窑尾气汞排放浓度为171~1186μg/m3,远超过《铅锌工业污染物排放标准》的排放限值(50μg/m3).该尾气中的汞排放主要以气态元素汞排放为主的特征,将增加回转窑大气汞排放控制的难度.
[Abstract]:The mercury emission characteristics of three zinc smelting rotary kilns treating leaching slag were tested and it was found that the process was an important node of atmospheric mercury emission in zinc smelting industry. The release rate of leached slag and fuel from smelter in rotary kiln is 80.3% / 99.3%. The mercury removal efficiency of flue gas dedusting process is 2.3% / 7.9%. The flue dust roasting at high temperature in the defluorination process of multi-chamber furnace results in a great decrease in the net mercury removal efficiency of rotary kiln dust removal process. The mercury removal efficiency of flue gas desulfurization system is 19.0% / 58.0%. The mercury emissions from the tail gas of rotary kiln accounted for 41.6% / 87.1% of the total mercury output in the leaching slag treatment process. The mercury emission concentration of tail gas from rotary kiln of smelter is 171 ~ 1186 渭 g / m ~ 3, which is much higher than the emission limit of lead-zinc industrial pollutant discharge standard (50 渭 g / m ~ 3). The mercury emission from the tail gas is mainly characterized by gaseous elemental mercury emissions, which will increase the difficulty of controlling atmospheric mercury emissions from rotary kilns.
【作者单位】： 清华大学环境学院环境模拟与污染控制国家重点联合实验室;国家环境保护大气复合污染来源与控制重点实验室;环境保护部环境保护对外合作中心;环境保护部固体废物与化学品管理技术中心;
【基金】：国家“973”项目(2013CB430001) 中国博士后基金(2016T90103,2016M601053)
【分类号】：X758
[Abstract]:The mercury emission characteristics of three zinc smelting rotary kilns treating leaching slag were tested and it was found that the process was an important node of atmospheric mercury emission in zinc smelting industry. The release rate of leached slag and fuel from smelter in rotary kiln is 80.3% / 99.3%. The mercury removal efficiency of flue gas dedusting process is 2.3% / 7.9%. The flue dust roasting at high temperature in the defluorination process of multi-chamber furnace results in a great decrease in the net mercury removal efficiency of rotary kiln dust removal process. The mercury removal efficiency of flue gas desulfurization system is 19.0% / 58.0%. The mercury emissions from the tail gas of rotary kiln accounted for 41.6% / 87.1% of the total mercury output in the leaching slag treatment process. The mercury emission concentration of tail gas from rotary kiln of smelter is 171 ~ 1186 渭 g / m ~ 3, which is much higher than the emission limit of lead-zinc industrial pollutant discharge standard (50 渭 g / m ~ 3). The mercury emission from the tail gas is mainly characterized by gaseous elemental mercury emissions, which will increase the difficulty of controlling atmospheric mercury emissions from rotary kilns.
【作者单位】： 清华大学环境学院环境模拟与污染控制国家重点联合实验室;国家环境保护大气复合污染来源与控制重点实验室;环境保护部环境保护对外合作中心;环境保护部固体废物与化学品管理技术中心;
【基金】：国家“973”项目(2013CB430001) 中国博士后基金(2016T90103,2016M601053)
【分类号】：X758
【参考文献】
相关期刊论文 前3条
1 魏威;陈海清;陈启元;刘q，
本文编号：2437544
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