露天煤场静态起尘量的实验研究  

Experimental Study of Static Dust Emission from a Coal Pile in the Open Air Yard

作　　者：丛晓春[1] 陈志龙[1] 詹水芬[2] 

机构地区：[1]山东科技大学土木建筑学院,山东青岛266510 [2]交通部天津水运工程科学研究所水路交通环境保护技术实验室,天津300456

出　　处：《中国矿业大学学报》2010年第6期849-853,共5页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(50808115);山东省中青年科学家奖励基金项目(BS200808008)

摘　　要：颗粒物源排放的定量研究是控制和治理大气颗粒物污染的基础和前提.本文以煤尘颗粒为例,采用风洞实验方法,测定了煤尘颗粒的起动风速:u*=2.65e0.00014dw0.2629,其计算值与起尘量外推法获得值相比,相差仅为3.9%,这为颗粒起动提供了定量判定方法.在此基础上,实验测定了静置煤堆在不同风速和含水率下的起尘量,得出了煤堆起尘量的数学模式:Q=0.132(u-u*)2.4e-0.3825wg/(s·m2),起尘量随含水率呈负指数变化,当含水率增加到4%时,起尘量减少率可达72.7%～97.8%.Quantitative investigation of particulate source emissions is the foundation of,and a prerequisite for,controlling atmospheric particulate pollution.Wind tunnel experiments were used to find the threshold air velocities for different coal-dust particle diameters and moisture contents.It was determined that the data fit the equation：u^＊ =2.65e^0.00014dw^0.2629.The error between data and prediction is only 3.9%.This provides a new quantitative criterion for the threshold wind velocity.The dust emission from a coal pile at different wind velocities and moisture contents was measured and an empirical model of dust emission from a single pile fits the equation,Q=0.132（u-u^＊）2.4^e-0.3825 wg/（s·m^2）.The dust emission increases as moisture content decreases,with a negative exponential trend.Dust emission decreases from 72.7%to 97.8%as the moisture content increases to 4%.

关 键 词：静态起尘量 起动风速 煤粉颗粒 风洞实验 

分 类 号：X513[环境科学与工程—环境工程]