摘要
为提高煤自燃绝热氧化试验结论的可靠性、完整性及应用性,采用绝热氧化试验方法研究褐煤和烟煤2种煤样的自燃氧化现象,根据试验结果,建立煤自燃特性预测模型,模拟褐煤和烟煤的升温速率和氧化过程,用试验数据验证模型的有效性;用验证后的模型预测不同煤质参数、动力学参数条件下煤的自燃特性。结果表明:试验和模型预测的最短着火时间褐煤分别为5.6和5.1 h,烟煤分别为43.8和42.2 h。该模型能够辅助试验获得完整的升温曲线,预测煤氧化升温到着火点所需要的时间。
In order to improve the testing results more reliable and complete and make them applicable for engineering practice,lignite and bituminous coal samples were studied experimentally and theoretically.The adiabatic oxidation method was applied to test the spontaneous combustion behaviors of these two samples. Based on results of the tests,a mathematical model for predicting spontaneous combustion characteristics of coal was developed to study self-heating rate and oxidation process of the lignite and bituminous coal. The effectiveness of the model was checked by the testing data. Trend of the self-heating curve from the experiment agrees with that of the self-heating traces determined by the model. Then the calibrated model was further used to predict the self-heating behaviors of other coals with different coal quality parameters and dynamic parameters. The testing and predicting results indicate that the thermal-runaway time determined by the tests and the model for lignite is 5.6 and 5.1 h and for bituminous coal is 43.8 and 42.2 h. This model is capable of facilitating the test to generate a complete self-heating curve and predicting the thermal-runaway time of spontaneous combustion of coal.
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2017年第6期67-72,共6页
China Safety Science Journal
基金
国家自然科学基金资助(51604144)
辽宁省煤炭资源安全开采与洁净利用工程研究中心开放基金资助课题(LNTU15KF14)
关键词
绝热氧化
煤自燃
发火时间
预测模型
升温速率
adiabatic oxidation
spontaneous combustion
thermal-runaway time
predicting model
self-heating rate
