车载机动车尾气测量系统高温尾气采样气路设计  

Design of High Temperature Exhaust Sampling Gas Circuit for Vehicular Exhaust Measuring System

作　　者：刘国华[1,2] 张玉钧[1] 陈晨[1] 高彦伟[1] 尤坤[1] 张恺[1] 何莹[1] 贺春贵[1] 鲁一冰 刘文清[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所中国科学院环境光学与技术重点实验室,安徽合肥230031 [2]中国科学技术大学,安徽合肥230026

出　　处：《大气与环境光学学报》2016年第6期429-434,共6页Journal of Atmospheric and Environmental Optics

基　　金：国家863计划;2014AA06A503;国家重大科学仪器设备开发专项;2012YQ22011902~~

摘　　要：为了准确测得机动车高温尾气中的CO_x、NO_x、THC等气体成分,基于旋风分离器原理,详细讨论了高温尾气的预处理方案;以微粒物过滤室、旋风分离器、阻液器和膜式干燥器为主要器件,设计了改进型旋风分离器和车载式高温尾气预处理采样气路;利用微粒物过滤室两次去杂、金属螺旋管降温、旋风分离器去水去杂、阻液器去水、膜式干燥器去水,在不改变尾气气体成分和含量的情况下,提高了样气净度;实验结果表明,预处理后的样气,相对湿度小于2.5%,温度低于40℃,所含颗粒物直径小于5μm,且含量极少,满足车载式机动车尾气气体成分分析模块的要求.To measure COx, NOx, THC and other gas components of vehicle high temperature exhaust accurately, based on the principle of cyclone, the high temperature exhaust pretreatment regimen is discussed in detail. An improved cyclone and vehicular high temperature exhaust pretreatment gas circuit are designed, taking particulate filter chamber, cyclones, fluid resistance and membrane dryers as the main device. Particulate filter chamber is used to remove dust, metal spiral is used to drop temperature, cyclone is used to remove water and dust, resistance dispenser is used to remove water and membrane dryer is used to remove water. Without changing the exhaust gas composition and content, the gas clarity is improved. Experimental results show that the relative humidity of pretreatment gas is less than 2.5%, temperature is below 40 -, particles diameter is less than 5 μm and the content is extremely low. The sampling pretreatment system meets requirements of motor vehicle exhaust composition analysis module.

关 键 词：高温尾气 采样气路 旋风分离器 预处理 

分 类 号：X734.2[环境科学与工程—环境工程] X84