摘要
应用稀释采样系统采集燃煤锅炉除尘后的烟气飞灰,同时采用再悬浮技术采集除尘器下载灰,分别建立两种采样方法所得燃煤飞灰TSP和PM10两种粒径的成分谱,并分析两种方法建立的成分谱的特征及差异。结果表明:燃煤锅炉排放的颗粒物中主要组分为TC、OC、Si、Al、Ca、Na、Mg、Fe以及SO24-;TSP、PM10中含量最丰富的组分是Si和TC。Cr、Zn、As、Pb、Cu等元素在PM10上呈明显的富集状态。干法除尘和湿法除尘后烟道气和下载灰颗粒物的组分存在显著差异;通过分歧系数的比较,证实两种不同采样方法获得的成分谱之间具有较大的差异。
A dilution sampling system was used to collect fly ashes in stack gas from coal-fired boilers while a re-suspended sampling chamber was adopted to collect ashes captured by emission control devices.Chemical profiles for TSP and PM10 were established by the two methods.The main chemical components for particulate matter from coal-fired boilers are TC,OC,Si,Al,Ca,Na,Mg,Fe and SO2-4.Si and TC are the most abundant species in TSP and PM10 profiles.As for trace elements,Cr,Zn,As,Pb and Cu are enriched in PM10 when compared to raw coal.There exist diversities for profiles obtained from boilers with wet and dry dust removal devices.Coefficient of divergence analysis indicate that profiles for dilution stack sampling and re-suspended sampling methods are different.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2011年第11期1928-1933,共6页
Journal of China Coal Society
基金
2006-2007年度国家环保公益性行业科研专项(200709048)
关键词
燃煤锅炉
稀释采样
TSP
PM10
富集因子
分歧系数
coal-fired boilers
dilution sampling
TSP
PM10
enrichment factor
coefficient of divergence
