煤炭工程 ›› 2016, Vol. 48 ›› Issue (8): 121-124.doi: 10.11799/ce201608036

• 研究探讨 • 上一篇    下一篇

煤粉工业锅炉用煤低温氧化特性的实验研究

魏琰荣,肖翠微,王乃继,等   

  1. 煤炭科学技术研究院有限公司节能分院
  • 收稿日期:2015-11-20 修回日期:2016-01-07 出版日期:2016-08-10 发布日期:2016-08-19
  • 通讯作者: 杨石 E-mail:1773005065@qq.com

Adiabatic Experimental Study on Low-temperature Oxidation Characteristics of Coal in Pulverized-coal Industrial Fired Boiler

  • Received:2015-11-20 Revised:2016-01-07 Online:2016-08-10 Published:2016-08-19

摘要: 煤粉的自燃与其低温氧化特性有关,为研究煤粉的低温氧化特性,采用绝热氧化的方法,对三种煤粉工业锅炉常用煤粉进行了实验,获得了煤粉的温升曲线和实验过程中气体产生情况。实验结果表明:三种常用煤粉中,挥发分含量越高,低温氧化活化能越低,煤种发生自燃的倾向性越强|煤粉升温过程中产生的CO、CO2、CH4量随着温度的升高而增加,O2量则随着温度升高而降低,并且煤的挥发分越高,气体产生(消耗)量越多。综合考虑,可将CO浓度作为自燃预警主要指标,将CH4、O2浓度作为辅助指标。

关键词: 煤粉工业锅炉, 煤粉自燃, 绝热氧化, 标志气体

Abstract: The spontaneous combustion of pulverized coal is closely related to its oxidation characteristics at low temperature. In this article, the adiabatic oxidation characteristics of three normal pulverized coal commonly used in pulverized-coal industrial fired boiler has been studied by adiabatic oxidation, and the heating curves and the gas yield were gained. The results show that the higher the volatile matter content of the afterburning fuel pulverized coal is, the lower the low-temperature oxidation activation energy is, and the stronger the coal spontaneous combustion tendency is. The concentration of CO, CO2,CH4 increases with the coal temperature, while the concentration of O2 decreases. Considering various factors, CO concentration can be used as the main indicators of early warning, and CH4 and O2 concentration can be used as secondary indicators.

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