富氧燃烧气氛下无机元素的迁移转化规律  

The Transformation of Inorganic Elements in Coal Under Oxyfuel Combustion

作　　者：伍夷飞 赵永椿[1] 张军营[1] 郑楚光[1] 

机构地区：[1]华中科技大学煤燃烧国家重点实验室,武汉430074

出　　处：《工程热物理学报》2015年第2期455-459,共5页Journal of Engineering Thermophysics

基　　金：国家973计划课题(No.2011CB707301);中央高校基本科研业务费专资金资助(No.2013QN087);国家科技支撑计划项目(No.2011BAC05B00)

摘　　要：采用热力学平衡计算方法对小龙潭高钙飞灰在燃后区低温烟气下无机元素的迁移转化规律进行了研究。在常压下,常温¹000C范围内,重点分析了烟气中CO₂浓度和SO₂对飞灰中无机元素迁移转化规律的影响。结果表明,在低温烟气区,Ca、Mg组分易发生碳酸化反应。CO₂浓度会影响碳酸化反应的进行,而SO₂的存在会极大地促进硫酸盐的生成,从而抑制碳酸化反应。Thermodynamic equilibrium calculation method has been used to investigate the transformation rule of inorganic elements in XiaoLongTan fly ash in low-temperature flue gas area.The effect of CO_2 concentration and SO_2 on the transformation of inorganic elements in fly ash has been analyzed at normal pressure and the temperature ranges from room temperature to 1000℃.The results show that in low-temperature area,the components with Ca,Mg are easy to react with CO_2.The concentration of CO_2 has a great effect on the carbonation reaction,while sulphation will be greatly promoted with the existence of SO_2,thus inhibit the carbonation reaction.

关 键 词：富氧燃烧 飞灰 无机元素 迁徙 

分 类 号：TK16[动力工程及工程热物理—热能工程]