Research on oxy-fuel combustion of blended coal in precalciner kiln

被引：0
|
作者：
Xu S. [1 ,2 ]
Yang Y. [1 ]
Shi Z. [2 ]
Liu F. [1 ]
Wu H. [1 ]
Xiao Y. [1 ]
Huang B. [3 ]
机构：
[1] School of Mechanical Engineering, Xiangtan University, Xiangtan
[2] School of Energy Science and Engineering, Central South University, Changsha
[3] Department of Energy Engineering, Zhejiang University, Hangzhou
来源：
Xu, Shunsheng (csuxss@163.com) | 1600年 / Central South University of Technology卷 / 48期
基金：
中国国家自然科学基金;
关键词：
Blended coal; Numerical simulation; Oxy-fuel combustion; Precalciner kiln;
D O I：
10.11817/j.issn.1672-7207.2017.11.036
中图分类号：
学科分类号：
摘要：
The oxy-fuel combustion of blended coal characteristics and rule were studied in the 2 500 t/d precalciner cement kiln with a four-channel burner via experiment and simulation, and the reliability of simulation results was verified by experiments. The results show that as the oxygen mole fraction of primary air rises, the combustion temperature and heat transfer rate both increase while the coal ignition temperature gradually reduces. The numerical calculation indicates that the blended coal combustion characteristics in the precalciner kiln are considerably improved using the technology of oxy-fuel combustion. Besides, the blending ratio of anthracite suitable for the kiln greatly increases in the oxy-mode combustion. Compared with the traditional air-mode combustion, the average flame temperature and char burnout ratio increase by 97 K and 5.09%, respectively, when the oxygen mole fraction of primary air is 27%. Meanwhile, even at the anthracite-blended ratio of up to 60%, the efficient and stable combustion are still obtained, and the flame property including temperature and shape can meet the requirements of clinker calcinations. © 2017, Central South University Press. All right reserved.
引用
收藏
页码：3116 / 3125
页数：9
相关论文
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