自由沉降法研究黄河沙中可吸入颗粒物的产生机理  

The Emission Characteristics of Inhalable Particles of the Yellow River Sand with the Methods of Free Sedimentation

作　　者：孙宗贵[1] 刘泽常[1] 刘媛媛[1] 孙伟[1] 

机构地区：[1]山东建筑大学市政与环境工程学院,山东济南250101

出　　处：《中国非金属矿工业导刊》2008年第2期41-44,共4页China Non-Metallic Minerals industry

基　　金：山东省科技攻关项目（2005GG3206093）;中-奥（地利）国际间科技合作项目（编号：CN/10）.

摘　　要：本课题以黄河沙为研究对象,利用自由沉降法研究黄河沙中可吸入颗粒物在不同质量流量、不同粒度组成、不同在线加湿量条件下的排放特性,发现质量流量和加湿量是影响黄河沙排放特性的主要因素,并且存在一个最佳加湿量。同时,与建筑尘、土壤尘进行对比,发现质量流量是所有粉体物料排放特性的影响因素,相同质量流量下建筑尘产尘率最高,黄河沙产尘率最低,主要是建筑尘的可吸入颗粒物的含量较高,因此认为人为排放源是主要污染源。This study examine the emission characteristics of inhalable particles of the Yello.w River sand using the method of free sedimentation. The influence of different mass flows, of different particle size distributions and different water volume flows are examined. We found mass flows and water volume flow are the main factor.The condition where the lowest emission occurs is also clarified. These results are compared with the emission studies of construction and soil dust. It turned out that the mass volume flow have the same influence on emission for these materials. Using the same mass flows, construction dust produced the highest dust generation rate.At the Yellow River sand the lowest emission occurred. Yellow River sand and soil dust both represent natural diffuse dust emission sources. Therefore, it is proven that the construction dust as a human caused source of emission is more important for the pollution of the atmosphere with inhalable particles.

关 键 词：自由沉降 质量流量 粒度组成 加湿量 黄河沙 

分 类 号：TD922[矿业工程—选矿] X513[环境科学与工程—环境工程]