室内卷烟阴燃颗粒物的粒径分布与迁移特性  

Size Spectrum Distribution and Migration Characteristics of Cigarette Smoldering Particles Under Indoor Environment

作　　者：胡玉琦[1] 周晓冬[1] 章涛林[1] 吴众刚[1] 陈艳秋[1] 杨立中[1] 

机构地区：[1]中国科学技术大学火灾科学国家重点实验室,合肥230026

出　　处：《燃烧科学与技术》2014年第4期368-372,共5页Journal of Combustion Science and Technology

基　　金：烟草行业卷烟烟气重点实验室开放课题资助项目(SZBCW201300549)

摘　　要：为探究卷烟阴燃亚微米颗粒物在室内环境中的粒径分布与迁移特性,采用DMS500快速型微粒光谱仪在线监测室内不同位置处卷烟阴燃粒径在5-1,000,nm范围内的烟颗粒,记录并分析随时间变化的气溶胶粒径谱分布信息,得到以累计颗粒数密度、几何中位径、颗粒数目衰减指数为表征的室内亚微米颗粒物迁移特性参数.结果表明：卷烟阴燃前后亚微米烟颗粒粒径谱呈现不同的对数偏态分布,且室内不同位置烟颗粒粒径谱形态类似;扩散、沉降、凝并等作用是导致烟颗粒在一定范围内迁移呈现不同变化规律的影响因素.The fast response differential mobility spectrometer（DMS500）was used to measure the cigarette smoldering particles in the 5,nm—1,000,nm range at different positions indoor,aiming at investigating the distribution of the submicron particles and their migration characteristics under indoor environment. The data of the size spectrum distribution was recorded and analyzed,meanwhile the cumulative concentrations,the GMD（geometric mean diameter）and the particle decay rates were obtained. The results indicate that the ETS submicron particles were logarithmic skewed distributed differently before and after the cigarette smoldering process,while the particle size spectra had almost similar forms at different positions indoor. Diffusion,sedimentation and coagulation had an influence on the variation of the particle migration to some extent.

关 键 词：烟颗粒 室内环境 粒径分布 迁移特性 

分 类 号：X838[环境科学与工程—环境工程]