空气中油雾和粉尘自然扩散对比实验研究  

Experimental Study on Natural Diffusion Characteristics of Oil Mist Particles and Dust Particles in the Air

作　　者：陈远平[1,2] 李灿[1,2] 杨维[1,2] 明锦[1,2] 胡光明 

机构地区：[1]湖南工业大学土木工程学院 [2]湖南省建筑节能与环境控制关键技术协同创新中心

出　　处：《建筑热能通风空调》2016年第5期21-23,94,共4页Building Energy & Environment

基　　金：国家自然科学基金项目(51246008)

摘　　要：为对比油雾和粉尘在室内的自然扩散特性,在无通风的条件下,分别发散一定浓度的油雾和粉尘,利用光学粒径谱仪对油雾和粉尘颗粒物浓度连续监测,记录空气中的颗粒残存比例随时间的变化,发现油雾和粉尘气溶胶中同粒径颗粒的自然扩散过程存在差异:油雾气溶胶的颗粒数浓度比粉尘气溶胶的颗粒在空气中衰减更快。同时发散粉尘和油雾,混合后扩散到室内,发现颗粒物粒径构成是两者的叠加。实验结果表明:油雾粒子比粉尘粒子自然扩散速度快,油雾气溶胶和粉尘气溶胶混合时,两种颗粒物之间并没有明显的凝并作用。To compare natural diffusion characteristics of oil mist and dust,the oil mist and dust were released respectively without ventilation conditions,the particulate matter concentration of which were continuously monitored with sand size spectrograph. From the change of particle remnant ratio with time,the difference of natural diffusion process in the same particle size between oil mist and dust in air were found： the dust particles decreased more than oil mist droplet. when they were diverged simultaneously and diffused into indoor space together,the particle size distribution in the air was same to the two combined. The experimental results show that the natural diffusion of oil mist is better than dust and there is no apparent coagulation capacity between dust and oil mist.

关 键 词：油雾 粉尘 凝并 自然扩散 气溶胶 

分 类 号：X51[环境科学与工程—环境工程]