煤粉炉烟气中汞浓度测试和分布(英文)

被引:6
作者
段钰锋
Shawn Kellie
Kunlei Liu
John Riley
机构
[1] 东南大学洁净煤发电和燃烧技术教育部重点实验室
[2] 美国西肯塔基大学化学系
[3] 美国西肯塔基大学化学系 南京
[4] 美国肯塔基州
关键词
燃煤烟气; 汞形态; 在线测量; 安大略法(OHM); 连续排放物监测(SCEM);
D O I
暂无
中图分类号
TK229.6 [燃煤锅炉];
学科分类号
080703 ;
摘要
参照美国标准实验方法(ASTM)中关于汞的OHM等速取样和化学分析法,结合汞的SCEM在线测量技术,利用一多功能流动实验室,对一满负荷运行的100MW煤粉锅炉尾部烟气系统进行了单质汞、氧化态汞和颗粒态汞的现场测试和分析.得到了空气预热器、静电除尘器前后烟气中气态、固态和烟气中总汞的浓度及其分布.结果表明烟气中气态总汞的浓度随温度的降低发生着氧化态汞向颗粒汞的转化.在ESP之后的清洁烟气中,OHM和SCEM方法的测试结果吻合较好;在含颗粒浓度较高的烟气中,2种方法存在较大的偏差,原因在于OHM取样过滤器中形成一定厚度的飞灰.该飞灰颗粒对烟气中气态汞有吸附作用并形成颗粒汞.
引用
收藏
页码:53 / 57
页数:5
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