Journal of Atmospheric and Environmental Optics ›› 2016, Vol. 11 ›› Issue (6): 429-434.

• 论文 • Previous Articles     Next Articles

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

LIU Guohua1,2, ZHANG Yujun1, CHEN Chen1, GAO Yanwei1, YOU Kun1, ZHANG Kai1, HE Ying1, HE Chungui1, LU Yibing1,2, LIU Wenqing1   

  1. (1 Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; 2 University of Science and Technology of China, Hefei 230026, China)
  • Received:2016-07-11 Revised:2016-09-26 Online:2016-11-28 Published:2016-11-30

Abstract:

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 ?m and the content is extremely low. The sampling pretreatment system meets requirements of motor vehicle exhaust composition analysis module.

Key words: high temperature exhaust, sampling gas circuit, cyclone, pretreatment

CLC Number: