固体吸收剂脱除高温烟气中碱金属研究  

Removal of Gaseous Alkali Metal Compounds from Hot Flue Gas by Solid Sorbents

作　　者：汉春利[1] 张军[1] 颜峥[1] 刘坤磊[1] 徐益谦[1] 陈逸 戴乐美[2] 

机构地区：[1]东南大学热能工程研究所,南京210096 [2]南京大学现代分析中心,南京210005

出　　处：《燃烧科学与技术》2001年第1期48-51,共4页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目! ( 5 96 0 6 0 0 8) ;国家重点基础研究专项经费资助项目! ( G19990 2 2 2 0 9)

摘　　要：活性矾土、二氧化硅、硅藻土及煤灰对高温烟气中碱金属的脱除都有一定的效果。通过模拟高温烟气下的热重实验 ,研究了温度对这些吸收剂脱除碱金属的影响 ,并从化学热力学的角度对实验结果进行了分析。结论为 4种吸收剂对碱金属的脱除都有一定的效果 ,但活性矾土和二氧化硅在实验条件下脱除碱金属效果更明显。计算结果表明 。Active bauxite, silicon dioxide, diatomaceous earth and ash have been found suitable for alkali removal from hot flue gas in a coal conversion system. The effect of temperature on the alkali adsorption/reaction using these sorbents was surveyed in the experiments in which a thermogravimetric analyzer was utilized under a simulated flue gas condition. Equilibrium calculations were also carried out to determine the mechanism of reaction. The results reveal that although all these sorbents are available for the alkali removal, the active bauxite and silicon dioxide are more effective, and the calculations suggest that a higher temperature can take more advantage to the alkali removal.

关 键 词：碱金属 脱除 固体吸收剂 煤 废气 

分 类 号：X701[环境科学与工程—环境工程]