中国电力2017，Vol.50Issue(11)：164-167,4.DOI:10.11930/j.issn.1004-9649.201610054
超低排放电厂脱硫及湿式电除尘废水中汞排放分析
Analysis on Mercury Emission From WFGD and WESP Wastewater in Ultra-Low Air Pollutant Emission Coal-Fired Power Plants
摘要
Abstract
In order to achieve the goal of ultra-low flue gas emission,a series of retrofit projects have been carried out on the 300 MW subcritical natural circulation coal-fired unit of Sanhe Power Generation Co.,Ltd.,such as low NOx burner modification,SCR denitration modification,low-low temperature economizer installation,high frequency power source modification for the electrostatic precipitator (ESP),efficiency improvement and tubular demister installation for the WFGD absorber,as well as the installation of wet ESP (WESP).Taking the unit as the study object to explore the changes of the mercury concentrations in the WFGD and WESP wastewater after the retrofits,the makeup water and discharge water of both the FGD absorber and WESP are sampled to analyze the mercury contents.The results show that due to the low mercury content in coal,limestone and the makeup water,the mercury concentration in WFGD and WESP wastewater is also very low which ranges between 0.140 and 0.468 μg/L and between 0.094 and 0.102 μg/L respectively.The mercury contents in the 52 m3/h WFGD discharge water increase by 1.75 to 5.50 mg while no significant changes of the mercury concentration is observed in the WESP discharge water.关键词
燃煤电厂/超低排放/湿式电除尘废水/脱硫废水/汞排放Key words
coal-fired power plant/ultra-low emission/WESP wastewater/WFGD wastewater/mercury emission分类
资源环境引用本文复制引用
宋畅,张翼,郝剑,彰金宝,王家伟,安连锁,张永生..超低排放电厂脱硫及湿式电除尘废水中汞排放分析[J].中国电力,2017,50(11):164-167,4.基金项目
国家科技支撑计划资助项目(2015BAA05B02)This work is supported by Key Projects in the National Science & Technology of China(No.2015BAA05B02). （2015BAA05B02）
