不同煤燃烧过程颗粒汞生成特性的实验研究  

Formation characteristics of Hg particulates during combustion of different coals

作　　者：高正阳[1] 殷立宝[2] 周黎明[1] 钟俊[1] 郑双清[1] 

机构地区：[1]华北电力大学能源与动力工程学院,河北保定071003 [2]广东电网公司电力科学研究院,广东广州510000

出　　处：《燃料化学学报》2012年第9期1135-1141,共7页Journal of Fuel Chemistry and Technology

基　　金：教育部留学回国人员科研启动基金;华北电力大学校内科研基金(200913003)

摘　　要：在高温管式电加热炉上进行了三种煤单独燃烧,三种煤添加1%、3%、5%溴化钙与醋酸钙燃烧,以及一种煤添加Fe2O3燃烧实验,燃烧温度为1250℃。收集了各燃烧过程的飞灰,对收集的飞灰进行了Hg含量测定,并对飞灰进行了比表面积、EDS与XRD表征。实验与分析结果表明,三种煤燃烧后Hgp的生成特性显著不同;三号煤灰的比表面积最大但飞灰颗粒Hg含量及Hgp比率均很低;在添加CaBr2后,三种煤飞灰颗粒Hg含量及Hgp比率均显著增加;在三种煤中添加醋酸钙,及在三号煤中添加Fe2O3后,Hgp含量与比率有所增加,但增加幅度较小。Combustion experiments（3 coals,3 coals with addition of 1%,3%,5% CaBr2 and Ca（CH3COO）2,and a coal with addition of Fe2O3） were conducted on a high temperature electric heating reactor at 1 250 ℃.The fly ashes were collected and the particulate Hg（Hgp） contents were analyzed.The specific surface area,EDS,and XRD analysis were performed.It is indicated that the Hgp formations characteristics of the 3 coals were rather different.The ash of coal 3 has the largest specific surface area,but the lowest Hg content and Hgp ratio in its ash.CaBr2 addition leads to significant increment of Hg content in ash and Hgp ratio.Ca（H3COO）2 and Fe2O3 addition do not lead to prominent increase of Hgp.

关 键 词：溴化钙 颗粒汞 煤燃烧 

分 类 号：X511[环境科学与工程—环境工程]