[1]王亚超,袁 泉,肖 旸,等.水分对白皎无烟煤氧化过程放热特性的影响[J].西安科技大学学报,2018,(05):721-727.[doi:10.13800/j.cnki.xakjdxxb.2018.0505]
 WANG Ya-chao,YUAN Quan,XIAO Yang,et al.Effect of moisture on exothermic characteristics of oxidation process of Baijiao anthracite[J].Journal of Xi'an University of Science and Technology,2018,(05):721-727.[doi:10.13800/j.cnki.xakjdxxb.2018.0505]
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水分对白皎无烟煤氧化过程放热特性的影响(/HTML)
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西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2018年05期
页码:
721-727
栏目:
出版日期:
2018-09-30

文章信息/Info

Title:
Effect of moisture on exothermic characteristics of oxidation process of Baijiao anthracite
文章编号:
1672-9315(2018)05-0728-09
作者:
王亚超12袁 泉12肖 旸12邓 军12
1.西安科技大学 安全科学与工程学院,陕西 西安 710054; 2.西安科技大学 陕西省煤火灾害防治重点实验室,陕西 西安 710054
Author(s):
WANG Ya-chao12YUAN Quan12XIAO Yang12DENG Jun12
1.College of Safety Science and Engineering,Xi'an University of Science and Technology,Xi'an 710054,China; 2.Shaanxi Key Laboratory of Prevention and Control of Coal Fire,Xi'an University of Science and Technology,Xi'an 710054,China
关键词:
矿业工程 氧化放热 C80 放热量 放热阶段
Keywords:
mining engineering heat liberation during coal oxidation C80 heat flux exothermic stage
分类号:
TD 752
DOI:
10.13800/j.cnki.xakjdxxb.2018.0505
文献标志码:
A
摘要:
为了探究水分对无烟煤低温氧化阶段放热特性的影响,完善水分对煤自燃影响的机理。以不同水分含量的白皎无烟煤为研究对象,利用C80热分析实验,将不同水分含量煤样的初始放热温度、总放热量、各阶段放热量等参数进行对比分析,研究白皎无烟煤在不同水分含量条件影响下煤样放热特性的变化规律。结果表明:随着水分含量的增加,煤样的初始放热温度呈现出先减小后增大的趋势; 总放热量、热量变化不同阶段的放热量及持续时间则呈现出先增大后减小的趋势,水分含量为16.34%时放热量较高,煤自燃的可能性也较大,但初始放热温度与总放热量间不存在相对应的关系。煤放热过程具有典型的分段性,分为缓慢放热、放热量减小和快速放热3个阶段,其中快速放热阶段持续时间最长,该阶段放热量占总放热量的比例超过84%,是造成煤体热量积聚的最主要原因。研究成果就完善水分对煤自燃影响机理的研究具有一定推动作用。
Abstract:
In order to study the effect of moisture on the exothermic characteristics of anthracite in the low-temperature oxidation stage,Baijiao anthracite of different moisture contents was tested to make a deep insight into the impacts of moisture on coal spontaneous combustion.Experiments using C80 thermal analyzer were conducted to compare the changes of initial exothermic temperature,total released heat and staged heat release and to investigate the exothermic characteristics of Baijiao anthracite at various moisture contents.The studies conclude that with the increase of moisture contents,the initial exothermic temperature of coal sample decreased at the beginning and increased afterwards.On the contrary,the total released heat,the staged heat release and the duration of heat release increased first and then decreased.The maximum hear release was reached when the moisture content is 16.34%,representing a strongest propensity of coal towards spontaneous combustion.But irrelevance between initial exothermic temperature and total heat release was observed.Additionally,the exothermic process of coal could be categorized into three stages:slow exothermic stage,weakened heat release stage and rapid exothermic stages.Among them,the rapid exothermic stage had the longest duration and accounted for over 84% of the total released heat.This stage was the main process for heat accumulation.The research is beneficial for a further understanding for the effects of moisture on coal spontaneous combustion.

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备注/Memo

备注/Memo:
收稿日期:2018-03-28 责任编辑:刘 洁
基金项目:国家自然科学基金(51504187,51674193); 陕西省自然科学基础研究计划(2018JM5152); 陕西省教育厅专项科学研究计划(17JK0487)
通信作者:王亚超(1981-),男,陕西宝鸡人,博士研究生,工程师,E-mail:28664676@qq.com
更新日期/Last Update: 2018-09-30