摘要
煤炭是中国重要的能源资源,而中国煤中重金属砷、硒、铅含量较高,燃煤电厂已经成为重要的砷、硒、铅排放源之一。针对电厂燃煤带来严峻的砷、硒、铅污染问题,本文首先介绍了燃煤释放的砷、硒、铅排放量大且危害性强,概述了世界各国关于重金属排放控制的相关政策法规,指出中国对燃煤重金属砷、硒、铅的排放控制势在必行;其次从煤中赋存形态、燃烧过程中的形态转化和质量分布三个方面阐释了燃煤过程中砷、硒、铅的迁移转化规律,重点描述了砷、硒、铅在颗粒物上的形态特征和尺度分布;最后综述了燃烧前、燃烧中和燃烧后对砷、硒、铅的排放控制技术,详述了吸附剂捕集和烟气净化装置协同脱除的研究进展,并论述了低低温除尘器和团聚技术对砷、硒、铅的强化脱除潜力。以期为燃煤电厂重金属砷、硒、铅超低排放的实现提供参考和指导。
Coal is the most significant source of energy generation in China,but the high content of arsenic/selenium/lead in coal has made coal-fired power plants become one of the main anthropogenic emission sources of them.To solve the serious problem on arsenic/selenium/lead pollution from coal-fired power plants,this paper firstly introduces the discharge and harmfulness of arsenic/selenium/lead released from coal-fired power plants,and summarizes the relevant domestic and foreign regulations on heavy metals emission control,then points out that it is necessary to control their emission from coal-fired power plants in China.Secondly,the migration and transformation behaviors of arsenic/selenium/lead during coal combustion are illustrated from the perspectives of occurrence form,speciation transformation and mass distribution,focusing on their speciation characteristics and size distribution in particulate matters.Finally,the control technologies pre-,in-and post-combustion are reviewed,and the research progress on their removal by adsorbents and air pollution control devices(APCDs)is described in detail.Meanwhile,the potential for strengthening the removal by electrostatic precipitators equipped with low temperature economizer and agglomeration technologies is discussed.In conclusion,it is aimed to provide reference and guidance for realization of ultra-low emission of arsenic/selenium/lead in coal-fired power plants.
作者
黄永达
胡红云
龚泓宇
刘慧敏
付彪
李帅
罗光前
姚洪
HUANG Yong-da;HU Hong-yun;GONG Hong-yu;LIU Hui-min;FU Biao;LI Shuai;LUO Guang-qian;YAO Hong(State Key Laboratory of Coal Combustion,Huazhong University of Science and Technology,Wuhan430074,China)
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2020年第11期1281-1297,I0001,共18页
Journal of Fuel Chemistry and Technology
基金
国家重点研发计划项目(2018YFB0605103)资助。
关键词
燃煤电厂
重金属
迁移转化规律
尺度分布
控制技术
coal-fired power plants
trace elements
migration and transformation behavior
size distribution
control technologies
