脱硫设施对2种燃煤锅炉排放VOCs的影响  

Effect of desulfurization on VOCs emission from two kinds of coal-fired boilers

作　　者：孙树睿 关卫省[1] 贾静[3] 武小琳 雷荣荣 贾天琪 刘文彬[2,4,5] SUN Shurui;GUAN Weisheng;JIA Jing;WU Xiaolin;LEI Rongrong;JIA Tianqi;LIU Wenbin(College of Water Resources and Environment,Chang'an University,Xi'an 710054,China;State Key Laboratory of Environmental Chemistry and Ecotoxicology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China;National Research Center for Geoanalysis,Beijing 100037,China;Hangzhou Institute For Advanced Study,UCAS,Hangzhou 310024,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]长安大学水利与环境学院,西安710054 [2]中国科学院生态环境研究中心,环境化学与生态毒理学国家重点实验室,北京100085 [3]国家地质实验测试中心,北京100037 [4]国科大杭州高等研究院,杭州310024 [5]中国科学院大学,北京100049

出　　处：《环境工程学报》2021年第5期1625-1633,共9页Chinese Journal of Environmental Engineering

基　　金：国家重点研发计划课题(2018YFB0605200)。

摘　　要：利用GC-MS,对我国7家典型燃煤电厂和2家焦化厂燃煤锅炉在脱硫工艺设施前后排放烟气中的VOCs进行了分析,并计算了燃煤电厂锅炉的排放因子和VOCs的排放量。2种锅炉在脱硫后VOCs的浓度分别为85~1374μg·m^(-3)和27~45μg·m^(-3)。脱硫设施对VOCs的排放影响受多种因素影响,包括脱硫设施的种类、VOCs的性质、脱硫浆液等。通过计算得到各企业的臭氧生成潜势值(OFP),为17~2640μg·m^(-3),其中苯系物对臭氧生成的贡献最大。计算得到燃煤电厂的排放因子为2.37 g·GJ^(-1),每年因火力发电排放的VOCs为4.2×10^(4)t。以上结果可为燃煤电厂的VOCs控制设备和工艺选择提供参考。The VOCs in the flue gas before and after wet flue gas desulfurization(WFGD)in 7 typical coalfired power plants and 2 coking plants in China were investigated by GC-MS,and the emission factors and the VOCs emissions of thermal power plants were calculated.The concentrations of VOCs after WFGD in coalfired power plants and coking plants were 85~1374μg·m^(-3)and 27~45μg·m^(-3),respectively.The impact of WFGD on VOCs emissions is affected by many factors,including kinds of desulfurization,the nature of VOCs,and desulfurization water.The ozone formation potential(OFP)of each plant was calculated,which was in the range of 17~2640μg·m^(-3).Aromatic hydrocarbons contributed the most to ozone generation.The calculated emission factor of coal-fired power plants was 2.37 g·GJ^(-1),and the annual amount of VOCs emitted by thermal power generation is 42000 t.Results from this research can provide reference for pollution control of VOCs in coal-fired power plants.

关 键 词：燃煤电厂 湿法脱硫 挥发性有机物 排放因子 臭氧生成潜势 

分 类 号：X511[环境科学与工程—环境工程]