|本期目录/Table of Contents|

[1]王 聪,李 君,等.煤自燃过程中的温升及CO 生成特性[J].燃烧科学与技术,2017,(05):458-464.[doi:10.11715/rskxjs.R201608023]
 Wang Cong,Li Jun,Fu Pengbin.Temperature Evolution and CO FormationDuring Self-Ignition of Coal[J].Journal of Combustion Science and Technology,2017,(05):458-464.[doi:10.11715/rskxjs.R201608023]
点击复制

煤自燃过程中的温升及CO 生成特性()
分享到:

《燃烧科学与技术》[ISSN:1006-8740/CN:12-1240/TK]

卷:
期数:
2017年05
页码:
458-464
栏目:
出版日期:
2017-10-15

文章信息/Info

Title:
Temperature Evolution and CO Formation During Self-Ignition of Coal
作者:
王 聪1李 君1 2付彭宾1
1. 天津大学机械工程学院,天津 300072;2. 中国矿业大学煤炭资源与安全开采国家重点实验室,徐州 221116
Author(s):
Wang Cong1Li Jun12Fu Pengbin1
1. School of Mechanical Engineering,Tianjin University,Tianjin 300072,China; 2. State Key Laboratory of Coal Resources and Safe Mining,China University of Mining and Technology,Xuzhou 221116,China
关键词:
煤田火灾盖层厚度升温速率低温氧化
Keywords:
coal fireoverburden thicknessheating ratelow temperature oxidation
分类号:
TK16
DOI:
10.11715/rskxjs.R201608023
文献标志码:
A
摘要:
设计搭建了研究煤田火灾的实验模拟装置.采用中心开通孔的耐高温泡沫陶瓷模拟上覆盖层,通过在煤 体下端外加热源的方式对煤层加热,研究了盖层表面的温度和生成的CO 随煤样温度的变化规律,并测量了煤体 温度随时间的变化规律.实验结果表明:盖层厚度的增加可以加快煤低温氧化进程,减少到达快速氧化临界温度 所需的时间;根据煤体的升温速率、CO 体积分数和盖层标志点温度随煤温的变化规律,可推断出实验用煤样氧 化加速的临界温度约为80,℃,CO 体积分数与煤样温度近似呈指数式关系.CO 体积分数与煤样温度的关系方程 可以用来判断煤低温氧化的程度,对煤田火灾的早期探测有一定指导意义.
Abstract:
An experiment apparatus was built to simulate underground coal fires.High-temperature ceramic foam with a through-hole was used to represent the overburden layer.By applying external heating to the bottom of coal layer,the surface temperature of ceramic foam and the CO formation changing with coal temperature were studied.The change of coal temperature with time was also measured.The experimental results indicate that the increase of ceramic foam thickness accelerates the low-temperature oxidation,thus reducing the time needed to reach the fast-oxidation critical point.In addition,based on the temperature rise,CO concentration and temperature evolution at typical points of the ceramic foam,it is derived that the critical temperature point for fastoxidation of the present coal sample is around 80,℃,and that the CO concentration is nearly in an exponential relationship with the coal temperature.The correlation between CO concentration and coal temperature could be used to judge the progress of low-temperature oxidation of coal,which could provide some guidance for the earlystage detection of underground coal fires.

备注/Memo

备注/Memo:
收稿日期:2016-08-30. 基金项目:中国矿业大学煤炭资源与安全开采国家重点实验室开放基金资助项目(14KF01). 作者简介:王 聪(1992— ),男,硕士研究生,jxwangcong@tju.edu.cn. 通讯作者:李 君,男,博士,副教授,lijun79@tju.edu.cn.
更新日期/Last Update: