燃煤钙基固砷剂的影响因素研究  

Study on the influence factors of calcium-based arsenic capture sorbent in coal combustion

作　　者：陈锦凤[1] 

机构地区：[1]武汉理工大学资源与环境工程学院,湖北武汉430070

出　　处：《环境污染与防治》2009年第7期59-61,共3页Environmental Pollution & Control

摘　　要：利用电石渣、CaCO3、CaCO3.Ca(OH)2和Ca(OH)2作为燃煤钙基固砷剂,通过正交试验研究了固砷剂种类、固砷剂用量、燃烧温度及煤粒径对固砷效果的影响。结果表明,燃烧温度是影响燃煤固砷的最显著因素,最佳为1050℃;钙基固砷剂中CaCO3和电石渣的固砷效果最好,其次是CaCO3.Ca(OH)2,Ca(OH)2的固砷效果最差;钙基固砷剂用量按Ca、S摩尔比计量为2.0、煤粒径为160～200目时,钙基固砷剂具有较好的固砷效果,而且具有固砷固硫的双重作用。Carbide slag, CaCO3, CaCO3 ·Ca（OH）2 and Ca（OH）2 were selected as calcium-based arsenic capture sorbent in the coal combustion process. Base on the orthogonal experiment, influence factors of arsenic capture were analyzed. The results showed that combustion temperature played a predominant role, 1 050 ℃ was optimum temperature for calciumbased materials capturing arsenic. Different calcium based sorbents presented capture efficiency, which followed the order of CaCO3〉Carbide slag〉CaCO3 〉Ca（OH）2〉Ca（OH）2. A better capturing arsenic efficiency would be obtained when Ca/S molar ratio was 2.0 and particle size of raw coal was 160-200 meshes. Blending calcium-based arsenic capture sorbent with coal can capture sulfur and arsenic simultaneously during coal combustion.

关 键 词：钙基固砷剂 燃煤 正交试验 

分 类 号：X701[环境科学与工程—环境工程]