Alkali Metal Spectral Radiation Characteristics of Single Coal Particle Flames During the O2/CO2 and O2/N2 Atmospheres

被引：0

作者：

Xie F. ^{[1
]}

Li J. ^{[1
]}

Song X. ^{[1
]}

Bai Y. ^{[1
]}

Wang J. ^{[1
]}

Su W. ^{[1
]}

Lyu P. ^{[1
]}

Yu G. ^{[2
]}

机构：

[1] State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Ningxia Hui Autonomous Region, Yinchuan

[2] Institute of Clean Coal Technology, East China University of Science and Technology, Xuhui District, Shanghai

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2023年 / 43卷 / 08期

基金：

中国国家自然科学基金;

关键词：

flame temperature; Na* and K*; O[!sub]2[!/sub]/N[!sub]2[!/sub] and O[!sub]2[!/sub]/CO[!sub]2[!/sub] atmospheres; single coal particle flame; spectrum diagnosis;

D O I：

10.13334/j.0258-8013.pcsee.212828

中图分类号：

学科分类号：

摘要：

The different atmosphere conditions have a great influence on the reaction characteristics of coal particles. Therefore, in this paper the effects of O2/CO2 and O2/N2 on flame size, flame temperature and spectral radiation characteristics of alkali metals (Na* and K*) during the combustion of single coal particle is investigated. A visual drop tube furnace combined with flame spectral diagnostic system is employed to capture the flame images and the flame temperature is calculated by the multi-wavelength radiation method at the at oxygen concentrations of 30%, 40% and 50%, respectively. The results indicate that as the reaction proceeds, the flame temperature increases monotonously and the flame size first increases and then decreases. In the O2/CO2 atmosphere, a thin "flame layer" appears around the single particle flame because of a higher heat capacity of CO2, while no similar phenomenon is observed in the O2/N2 atmosphere. With the increase of oxygen concentration, the peak intensities of Na* and K* increase in the single coal particle flame. In addition, the peak intensities of Na* and K* and flame temperature in O2/N2 atmosphere are higher than those in O2/CO2 atmosphere, and the peak intensities of Na* and K* are positively correlated with flame temperature; thus the flame temperature can be characterized by alkali metal atomic radiation spectrum. ©2023 Chin.Soc.for Elec.Eng.

引用

页码：3100 / 3108

页数：8

共 30 条

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