不同变质程度煤燃烧阶段动力学参数

发布时间：2018-05-27 07:01

  本文选题：煤燃烧 + 特征温度点　； 参考：《辽宁工程技术大学学报(自然科学版)》2017年04期

【摘要】：为研究煤自燃特征温度及危险程度,通过热重试验确定各煤种各个阶段温度范围和特征温度值,并用Freeman-Carroll法建立了反应研究f(α),并求出燃烧阶段煤的指前因子和活化能,并对特征温度值、指前因子和活化能变化规律进行了分析.研究结果表明:6种煤样燃烧阶段温度分别为247℃~433℃、280℃~537℃、279℃~542℃、272℃~550℃、313℃~574℃和365℃~594℃;随着固定碳的增加,煤燃烧过程及特征温度点滞后,煤的活化能和指前因子增大,1#煤样最易自燃,6#煤样最不易自燃;T1温度从247℃增大到365℃,T2温度从386℃增大到479℃,T3温度从408℃增大到514℃,T4温度从433℃增大到594℃.
[Abstract]:In order to study the characteristic temperature and dangerous degree of coal spontaneous combustion, the temperature range and characteristic temperature value of each stage of coal were determined by thermogravimetric test, and the reaction study f (a) was established by Freeman-Carroll method, and the preexponential factor and activation energy of coal in combustion stage were calculated. The changes of characteristic temperature, preexponential factor and activation energy were analyzed. The results show that the combustion temperatures of 6 kinds of coal samples are 247 鈩，

本文编号：1940935