碱性废渣用于煤燃烧固硫的性能与改性  

Sulfur retention performance and modification of alkaline wastes used in coal combustion

作　　者：韩奎华[1] 赵建立[1] 郑斌[2] 路春美[1] 赵改菊[3] 

机构地区：[1]山东大学燃煤污染物减排国家工程实验室,山东济南250061 [2]山东理工大学交通与车辆工程学院,山东淄博255049 [3]山东省科学院工业节能研究中心,山东济南250103

出　　处：《煤炭学报》2009年第12期1697-1702,共6页Journal of China Coal Society

基　　金：中国博士后科学基金资助项目(20080431172);山东省科技攻关计划资助项目(2007GG20006013);山东省博士后创新项目(200802027)

摘　　要：试验研究了5种碱性废渣和1种石灰石在煤燃烧中的固硫性能,以及复合、调质对固硫性能的影响,探讨了固硫剂孔结构和成分对固硫能力的影响.结果表明:在燃烧温度为900～1000℃条件下,与石灰石相比,电石渣和白泥固硫率较高,而碱渣、赤泥、盐泥固硫效果较差.在燃烧温度900℃左右乙醇和醋酸调质可明显改善固硫.随燃烧温度升高,乙醇改良作用减弱,而醋酸调质减弱了赤泥之外的固硫性能.优化碱性废渣和石灰石复合,可提高固硫剂的固硫率和利用率.The sulfur retention performances of five types of alkaline industrial wastes and a type of limestone were studied in coal burning experiments, including the effect of coordination and modification of sorbents on the sulfur retention. The influences of the pore structure and composition of sorbents on the sulfur retention capability were discussed. The results show that at the combustion temperature of 900 - 1 000 ℃ higher sulfur retention efficiencies are obtained with the carbide slag and white mud compared with the limestone, but lower sulfur retention efficienties are achieved with alkali slag, red mud and salt mud. The modification with ethanol and acetic acid can improve the sulfur retention performance at the combustion temperature of about 900 ℃. With the increase of combustion temperature, the improvement effect of ethanol reduces, instead the modification with acetic acid weakens the sulfur retention capability of sorbents except for red mud. To optimize the compound of alkaline wastes and limestone can enhance the sulfur retention efficiency and utilization of the sorbents.

关 键 词：碱性废渣 煤燃烧 固硫 改性 

分 类 号：TQ534[化学工程—煤化学工程] X511[环境科学与工程—环境工程]