Attrition of limestone during fluidized bed calcination and sulfation

被引：0
|
作者：
Cai R. [1 ]
Huang Y. [1 ]
Cheng L. [1 ]
Li D. [2 ]
Jeon C.-H. [2 ]
Yang H. [1 ]
Lyu J. [1 ]
Zhang M. [1 ]
机构：
[1] State Key Laboratory of Control and Simulation of Power System and Generation Equipment, Department of Energy and Power Engineering, Tsinghua University, Beijing
[2] School of Mechanical Engineering, Pusan Clean Coal Center, Pusan National University, Pusan
来源：
Huagong Xuebao/CIESC Journal | 2019年 / 70卷 / 08期
关键词：
Attrition; Chemical reaction; Fluidized bed; Limestone; Model; Sulfur dioxide;
D O I：
10.11949/0438-1157.20190335
中图分类号：
学科分类号：
摘要：
Attrition characteristics of limestone has a significant effect on material balance and SO2 capture efficiency in circulating fluidized beds. A bubbling reactor system, equipped with a particle separation apparatus and mass spectrum analyzer, was used to investigate the mutual influence between the calcination and sulfation reactions and the limestone attrition under different conditions. The results showed that sulfation reaction would be significantly reduced the attrition rate, delaying the time for reaching to the stable attrition rate. As the sulfation reaction progressed, the outer surface layer of a CaO particle was gradually covered by CaSO4. After the initial fast reaction finished, the attrition rates of limestone tended to be stable. Attrition would remove the impervious sulfate layers and enhance the sulfation conversion. Besides, the attrition rate decreased with the increasing sulfation conversion at the same reaction condition. Finally, using the existing literature data to analyze and verify the limestone attrition model, it can better reflect the difference in attrition rate of limestone with different particle sizes. © All Right Reserved.
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页码：3086 / 3093
页数：7
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