微波作用对颗粒煤瓦斯解吸规律影响的实验研究

发布时间：2018-12-11 01:59

【摘要】：为了研究微波对颗粒煤解吸规律的影响,利用1500W的微波对粒径为1~3mm的烟煤进行了不同时间的改性,通过实验室搭建的吸附解吸测试系统进行了各实验煤样在不同吸附平衡压力下的瓦斯解吸实验,并对各实验煤样的瞬间解吸量、累积解吸量,以及各煤样的比表面积和孔隙分布进行了对比分析。结果表明:随着微波作用时间的增加,煤样自身得到加热的同时改变了煤样的孔隙结构;主要表现在相同吸附平衡压力下,各实验煤样微波作用3min和5min时的瞬间解吸量和累计解吸量均产生"拐点",呈现了先增加后减小,再增加的变化趋势和规律,且对瓦斯吸附起决定性作用的微孔的比表面积和孔隙体积的分布规律亦出现上述变化趋势;最后初步探讨分析了微波对颗粒煤解吸特性影响的作用机理。
[Abstract]:In order to study the influence of microwave on the desorption law of granular coal, the bituminous coal with particle size of 1~3mm was modified by 1500W microwave for different time. The gas desorption experiments of each experimental coal sample under different adsorption equilibrium pressures were carried out by the adsorption and desorption test system set up in the laboratory, and the instantaneous desorption amount and cumulative desorption amount of each experimental coal sample were also studied. The specific surface area and pore distribution of each coal sample were compared and analyzed. The results show that with the increase of microwave time, the coal sample is heated and the pore structure of the coal sample is changed at the same time. Under the same adsorption equilibrium pressure, the instantaneous desorption amount and cumulative desorption amount of coal samples under microwave irradiation of 3min and 5min all produced "inflection points", which showed the trend and regularity of increasing first and then decreasing, then increasing. The distribution of the specific surface area and pore volume of the micropores, which play a decisive role in gas adsorption, also shows the above changing trend. Finally, the mechanism of microwave effect on desorption characteristics of granular coal is discussed.
【作者单位】：河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培训基地(河南理工大学);河南理工大学安全科学与工程学院;煤炭安全生产河南省协同创新中心;
【基金】：国家自然科学基金(51404100) 国家重点基础研究发展计划(973计划)(2012CB723103) 教育部“创新团队发展计划”(IRT1235)(11078003)
【分类号】：TD712;TN015

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