自然环境下煤尘表面水分蒸发特性的实验  

Experimental of water evaporation on the mine surface in natural environment

作　　者：丛晓春[1] 刘雪梅[2] 詹水芬[3] 

机构地区：[1]山东科技大学土木建筑学院,山东青岛266510 [2]山东科技大学化学与环境工程学院,山东青岛266510 [3]交通运输部天津水运工程科学研究院水路交通环境保护技术实验室,天津300456

出　　处：《煤炭学报》2010年第1期93-96,共4页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(50808115);山东省中青年科学家奖励基金资助项目(2008BS08008)

摘　　要：为确定经济合理的喷洒工艺,采用现场实测的方法对煤尘洒水后其表面水分的变化进行了全年测定。在分析了自然环境下煤尘表面水分的蒸发迁移特性后指出:水分蒸发速率取决于相间浓度差、阻力以及初始接触面积等气-液界面上的特征参数。并将全年实测数据进行整理,得出煤尘表面水分变化速率k随大气湿度、空气流速及环境温度变化的定量表达式,明确了水分蒸发速率与各气象要素之间的关系。For determination economical and reasonable spraying procedures, the whole-year filed campaign was carried out to investigate the water content change on the mine surface after spraying water. The moisture evaporative situation was decided by the factors, such as phase concentration difference,resistance and initial contact area between the gas- solid interfaces after studying the moisture transfer characteristics occurring on the mine surface in the natural environ- ment. Then, the experimental data was analyzed and a quantitative expression of the water content variable rate on the mine surface k with the atmospheric humidity, air velocity and ambient temperature was put forward. Consequently, it clearly defined the relationship between the moisture evaporative speed and each metrological factor.

关 键 词：煤尘表面 水分蒸发 喷雾洒水 气象要素 

分 类 号：TD714.41[矿业工程—矿井通风与安全]