工业烟气氨排放特征及其对颗粒物污染形成影响

夏思佳; 何文太; 易金润; 苗丰; 张西谋

引用本文:	夏思佳,何文太,易金润,苗丰,张西谋.工业烟气氨排放特征及其对颗粒物污染形成影响[J].环境监控与预警,2024,16(6):76-80
	XIA Sijia,HE Wentai,YI Jinrun,MIAO Feng,ZHANG Ximou.Ammonia Emission Characteristics from Industrial Flue Gas and its Effect on Particulate Pollution[J].Environmental Monitoring and Forewarning,2024,16(6):76-80

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工业烟气氨排放特征及其对颗粒物污染形成影响
夏思佳¹，何文太¹，易金润²，苗丰³，张西谋³
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

摘要:

氮氧化物（NO_X）超低排放控制背景下，工业烟气氨（NH₃）逃逸问题被广泛关注。为探究重点行业NH₃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NH₃排放进行了监测，并针对NH₃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NH₃排放质量浓度为0.7～65.4 mg/m³，热电、日用玻璃行业的NH₃逃逸问题突出，其NH₃平均质量浓度分别为37.4，39.2 mg/m³。采用选择性非催化还原（SNCR）脱硝设施的工业烟气NH₃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；NH₃逃逸现象严重的生产线的排气筒出口处CPM质量浓度达到717～1 322 mg/m³，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。

关键词: 工业烟气氨逃逸可凝结颗粒物排放特征

DOI：DOI：10.3969/j.issn.1674-6732.2024.06.012

分类号:X701

基金项目:江苏省生态环境科研项目（2023011）

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

XIA Sijia¹， HE Wentai¹， YI Jinrun²， MIAO Feng³， ZHANG Ximou³

1.Jiangsu Key Laboratory of Environmental Engineering， Jiangsu Academy of Environmental Science， Nanjing， Jiangsu 210036, China；2.Department of Environmental Science and Engineering， Fudan University， Shanghai， 200433, China； 3.Nanjing Guodian Environmental Protection Technology Co.，Ltd.，Nanjing， Jiangsu 210096, China

Abstract:

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， NH₃ 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 NH₃ emission concentration were between 0.7～65.4 mg/m³. Ammonia escape in thermoelectric and glass industries was prominent， the average concentration was 37.4 and 39.2 mg/m³， respectively. The NH₃ 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 717～1 322 mg/m³， 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.

Key words: Industrial flue gas Ammonia escape Condensable particulate matter Emission characteristics