雾化超重力技术在柴油机尾气脱硝除尘中的应用  

Application of atomization hypergravity technology in denitrification and dust removal of diesel engine exhaust

作　　者：韦迪 雷嘉梁 张宇萌 魏怡 王博[1] Wei Di;Lei Jialiang;Zhang Yumeng;Wei Yi;Wang Bo(College of Earth and Environmental Sciences,Lanzhou University,Key Laboratory of Western China’s Environmental Systems(Ministry of Education),Gansu Engineering Center of Technology and Equipment for Fine Particles Pollution Control,Lanzhou Gansu 730000,China)

机构地区：[1]兰州大学资源环境学院西部环境教育部重点实验室,甘肃省细颗粒物污染控制技术与装备工程研究中心,甘肃兰州730000

出　　处：《石油化工》2022年第10期1196-1202,共7页Petrochemical Technology

基　　金：中央高校基本科研业务费项目(lzujbky-2021-71);甘肃省重点研发项目(20YF3FA002);甘肃省重点研发项目(20YF8FA112)。

摘　　要：基于雾化超重力技术,提出了一种颗粒物(PM)与气态污染物协同处理技术,用于协同脱除柴油机尾气中的氮氧化物(NO_(x))和PM,并且研究了最佳系统参数下净化装置的脱硝除尘效率。首先在怠速工况下分析柴油机尾气NO_(x)和PM特征,将脱硝系统分为氧化段、还原段,分别去除NO和NO_(2),筛选出最佳的氧化剂NaClO_(2)对NO的脱除效率最高可达到100%,最佳还原剂Na_(2)SO_(3)对NO_(2)的脱除效率最高可达50%。其次在最佳脱硝剂组合下,通过逐步优化雾气含量、脱硝剂含量、尾气停留时间三个重要参数,得到最佳系统参数。实验结果表明,在最优参数下,可达到较高的脱硝除尘效率,其中总脱硝效率为80%,总除尘效率为90%。Based on the atomization hypergravity technology,a co-processing technology for treatment of particulate matter(PM)and gaseous pollutants was proposed to synergistically remove nitrogen oxides(NO_(x))and PM from diesel engine exhaust.The denitrification and dust removal efficiency of the purification device under the best system parameters were studied.First,the characteristic of NO_(x) and PM in diesel engine exhaust was analyzed under idle condition.Based on this,the denitrification system was divided into oxidation section and reduction section to remove NO and NO_(2) respectively.NaClO_(2) and Na_(2)SO_(3) were used as oxidant and reductant,with 100%of NO removal efficiency and 50%of NO_(2) removal efficiency respectively.Next,under the best combination of denitrification reagents,the best system parameters were obtained by gradually optimizing three important parameters of fog content,denitrification agent content and exhaust residence time.The experimental results show that under the optimal system parameters,high denitrification and dust removal efficiency can be achieved,in which the total denitrification efficiency is 80%and the total dust removal efficiency is 90%.

关 键 词：柴油机尾气 雾化超重力技术 脱硝 除尘 

分 类 号：TQ028[化学工程]