【摘要】 煤中水分的分布是煤科学研究中的一个重要问题。本文把煤介电常数的各向异性性质结合微波加热技术,对煤中水分的分布规律进行实验研究,然后建立了水分分布模型进行理论分析,理论分析结果与实验结果进行比较分析,结果基本吻合。最后给出由模型计算所得的典型煤种的水分分布预测曲线。更多还原

【Abstract】 A new modei describing the moisture distribution in coal is developed based on the observations of coal particle micro structure. The fiber micro-structure of coal determines that the moisture distribution in coal appears homocentric tube property. The microwave irradiation technology is applied to measurements on the moisture distribution in coal particles. The moisture transport in coal particle is analyzed and simulated numerically using the moisture distribution modei. It, which the experimental results are well satisfied with the modei, proofs the modei discovering the nature of coal constructional structure. The interaction between moisture distribution and dielectric property in coal is discussed, and find that moisture distribution results in dielectric anisotropy. The experiments provide related evidence of dielectric anisotropy phenomenon. Further the relationship between the constants of the mode and typical kinds of coal is obtained.更多还原