工业烟气氨排放特征及其对颗粒物污染形成影响  

Ammonia Emission Characteristics from Industrial Flue Gas and its Effect on Particulate Pollution

作　　者：夏思佳[1] 何文太 易金润 苗丰 张西谋 XIA Sijia;HE Wentai;YI Jinrun;MIAO Feng;ZHANG Ximou(Jiangsu Key Laboratory of Environmental Engineering,Jiangsu Academy of Environmental Science,Nanjing,Jiangsu 210036,China;Department of Environmental Science and Engineering,Fudan University,Shanghai,200433,China;Nanjing Guodian Environmental Protection Technology Co.,Ltd.,Nanjing,Jiangsu 210096,China)

机构地区：[1]江苏省环境工程重点实验室,江苏省环境科学研究院,江苏南京210036 [2]复旦大学环境科学与工程系,上海200433 [3]南京国电环保科技有限公司,江苏南京210096

出　　处：《环境监控与预警》2024年第6期76-80,共5页Environmental Monitoring and Forewarning

基　　金：江苏省生态环境科研项目(2023011)。

摘　　要：氮氧化物(NO_(x))超低排放控制背景下,工业烟气氨(NH_(3))逃逸问题被广泛关注。为探究重点行业NH_(3)逃逸现状及其对空气质量的影响,本研究于2022年3—6月针对江苏省7个重点行业烟气NH_(3)排放进行了监测,并针对NH_(3)逃逸严重的4条生产线测试其可凝结颗粒物(CPM)的排放特征。研究结果显示,68家企业的NH_(3)排放质量浓度为0.7~65.4 mg/m^(3),热电、日用玻璃行业的NH_(3)逃逸问题突出,其NH_(3)平均质量浓度分别为37.4,39.2 mg/m^(3)。采用选择性非催化还原(SNCR)脱硝设施的工业烟气NH_(3)排放质量浓度分别是采用选择性催化还原(SCR)和SNCR+SCR联合技术的2.36,1.42倍;NH_(3)逃逸现象严重的生产线的排气筒出口处CPM质量浓度达到717~1322 mg/m^(3),抵消了脱硫、脱硝和除尘带来的减排效果,对细颗粒物(PM_(2.5))污染有直接贡献。研究结果可对我国二次颗粒物来源与治理方向提供支撑。Ammonia escape from industrial flue gas has been widely concerned under the background of ultra-low NO_(x)emission control.In order to investigate the current situation of ammonia escape and its impact on air quality,NH_(3)emission monitoring was conducted in 7 industries in Jiangsu Province from March to June 2022,and the emission characteristics of condensable particulate matter(CPM)was tested in 4 production lines with serious ammonia escape.The results showed that the NH_(3)emission concentration were between 0.7~65.4 mg/m^(3).Ammonia escape in thermoelectric and glass industries was prominent,the average concentration was 37.4 and 39.2 mg/m^(3),respectively.The NH_(3)emission concentration from industrial flue gas using SNCR denitrification facilities was 1.4~2.4 times higher than that using SCR and SNCR+SCR technologies.The CPM concentration in production lines with serious ammonia escape reached 717~1322 mg/m^(3),which offset the emissions reduction brought about by desulfurization,denitrification and dust removal and made a direct contribution to PM_(2.5).The results can provide support for the source and control direction of secondary particulate matter in China.

关 键 词：工业烟气 氨逃逸 可凝结颗粒物 排放特征 

分 类 号：X701[环境科学与工程—环境工程]