添加钙对燃煤过程颗粒汞生成特性影响的试验研究  

Effect of Calcium Addition on Formation of Particulate Mercury in Coal Combustion Process

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

机构地区：[1]华北电力大学能源动力与机械工程学院,保定071003 [2]广东电网公司电力科学研究院,广州510000

出　　处：《动力工程学报》2012年第12期954-959,989,共7页Journal of Chinese Society of Power Engineering

基　　金：中央高校基本科研业务费专项资金资助项目(10MG19)

摘　　要：在高温煤粉携带炉上进行了2种煤添加CaO和CaCl2的燃烧试验,采集各燃烧条件下的飞灰样品进行Hg质量分数测定,并对飞灰进行了能谱(EDS)与X射线衍射(XRD)分析.结果表明:添加CaO能使Hgp含量增加,添加CaCl2促进Hgp的生成效果比添加CaO显著;当CaCl2的添加率为3%时,Hgp比率最大,且灰中的Cl占总投入Cl的质量分数也最大.Combustion experiments on two types of coal with additions of CaO and CaCle were conducted in a high-temperature entrained-flow pulverized coal reactor, during which ash samples under various com- bustion conditions were collected, so as to measure the mass fraction of Hg and perform EDS and XRD a- nalysis on the fly ash. Results show that the addition of CaO may promote the formation of Hgp, but its promotion effect is weaker than CaCl2. Maximum ratio of Hgp shall be found in flue gas at a CaCl2 addition ratio of 3%, when the mass fraction of Cl in fly ash reaches the highest in the total inlet of Cl.

关 键 词：煤燃烧 高温煤粉携带炉 颗粒Hg 钙添加 试验研究 

分 类 号：X511[环境科学与工程—环境工程]