煤自燃阶段动力学参数及特征温度点的实验研究

发布时间：2018-07-09 12:19

本文选题：煤自燃 + 指标气体　；参考：《西安科技大学学报》2015年05期

【摘要】：为了考察程序升温实验条件下煤自燃阶段特征参数的变化情况,分别对常村贫煤、兴县气肥煤、唐山1/3焦煤等煤样的进行程序升温实验,得到3煤样在低温自燃阶段其指标气体的析出变化曲线。实验结果表明:在同一受热温度,低变质程度的气肥煤其CO,C2H4等指标气体的析出浓度比高变质程度的焦煤和贫煤高,而C2H6则相反;CO特征气体在受热初期并不是所有煤样都存在,且C2H4,C2H6的释放规律与煤质无关;通过对低温段内煤自燃的反应能级及活化能值的计算,得到煤低温氧化段内的反应能级及活化能值,并找出了阶段特征温度点。煤反应能级和活化能的大小反映了煤在不同温度段内其自身氧化能力的强弱,特征温度点温度则可用来判断煤自燃所处的燃烧阶段。
[Abstract]:In order to investigate the change of characteristic parameters of coal spontaneous combustion under programmed temperature test, the temperature programmed tests were carried out on coal samples of Changcun lean coal, Xingxian gas fat coal, Tangshan 1 / 3 coking coal, etc. The change curve of the index gas in the low temperature spontaneous combustion stage of coal sample 3 was obtained. The experimental results show that, at the same heating temperature and low metamorphism, the CO _ 2H _ 4 and other index gases in the gas fertilizer coal are higher than those in the coking coal and lean coal with high metamorphism, while the CO characteristic gas of C _ 2H _ 6 does not exist in all coal samples at the initial stage of heating. The release rule of C _ 2H _ 4 and C _ 2H _ 6 has nothing to do with coal quality, the reaction energy level and activation energy value of coal spontaneous combustion in low temperature section are calculated, the reaction energy level and activation energy value in low temperature oxidation section are obtained, and the characteristic temperature point of stage is found. The level of reaction energy and activation energy of coal reflect the degree of oxidation ability of coal in different temperature range, and the temperature of characteristic temperature can be used to judge the combustion stage of coal spontaneous combustion.
【作者单位】：中原工学院能源与环境学院;河南工程学院安全工程系;中国建筑第七工程局有限公司;
【分类号】：TD752.2

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