摘要
以神华国华三河发电有限公司300MW机组为研究对象,通过汞排放特征测试,得出该电厂燃煤汞排放现状和大气污染控制设施的协同脱汞效率。除尘器可去除颗粒态汞,并将其转化到灰渣中,经过除尘器后烟气中的颗粒态汞占汞总含量的比例由5.66%降至接近零,静电除尘对颗粒态汞的去除率几乎达到100%。在SCR脱硝催化剂的作用下,烟气中83.4%的气态Hg0被氧化成气态Hg2+,降低了汞的排放量。指出可通过洗选煤技术、燃烧后脱汞以及转化汞形态等措施降低汞排放。
Taking the 300 MW unit in Shenhua Guohua Sanhe Coal-fired Power Plant as the research object,mercury emission characteristics test was performed to obtain the mercury emission situation of this power station and the mercury cooperative control efficiency of air pollution control facilities.The precipitator can remove the particulate mercury and transform it to the ash and slag.The proportion of particulate mercury to the total mercury in flue gas which already passed the precipitator dropped from 5.66% to nearly 0,indicating the mercury removal rate of the electrostatic precipitation reached 100% approximately.Due to the SCR denitration catalyst,about 83.4% of the gas phase Hg0 in flue gas was oxidized to gas phase Hg2+,thus the mercury emission was reduced.Combining with the research of mercury control for coal-fired power plants at home and abroad,suggestions for reducing the mercury emission were put forward,such as coal washing,mercury removal after combustion,and mercury speciation transformation.
出处
《热力发电》
CAS
北大核心
2013年第3期11-14,共4页
Thermal Power Generation
关键词
燃煤电厂
大气污染
汞排放
协同脱汞
效率
除尘器
coal-fired power plant
300 MW unit
air pollution control facility
mercury cooperative control
removal efficiency
