【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。更多还原

【Abstract】 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 calcium-based 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.更多还原