燃煤电厂和钢铁厂排放可凝结颗粒物中有机组分研究  

ORGANIC COMPONENTS IN CONDENSABLE PARTICLE MATTER EMITTED FROM COAL-FIRED POWER PLANTS AND STEEL PLANTS

作　　者：邓建国[1] 王东滨[1] 刘通浩 李雪[1] 杨书文 段雷[1,3] 蒋靖坤 DENG Jianguo;WANG Dongbin;LIU Tonghao;LI Xue;YANG Shuwen;DUAN Lei;JIANG Jingkun(School of Environment,Tsinghua University,Beijing 100084,China;State Environmental Protection Key Laboratory of Quality Control in Environmental Monitoring,China Environmental Monitoring Centre,Beijing 100012,China;State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex,Beijing 100084,China)

机构地区：[1]清华大学环境学院,北京100084 [2]中国环境监测总站国家环境保护环境监测质量控制重点实验室,北京100012 [3]国家环境保护大气复合污染来源与控制重点实验室,北京100084

出　　处：《环境工程》2022年第3期13-17,31,共6页Environmental Engineering

基　　金：国家能源集团科技创新项目(GJNY-19-56)。

摘　　要：目前我国燃煤电厂超低排放改造已基本完成,钢铁行业正在进行超低排放改造。固定源排放的可过滤颗粒物(filterable particulate matter,FPM)浓度越来越低,可凝结颗粒物(condensable particulate matter,CPM)排放逐渐引起广泛关注。揭示燃煤电厂和钢铁厂CPM中有机组分特征对于认识CPM成因及控制具有重要意义。采用稀释间接法收集了8个燃煤电厂和3个钢铁厂(2个烧结厂和1个焦化厂)烟气中的CPM,测试和分析了其中有机组分特征。结果表明:燃煤电厂CPM中有机组分含量较低,脱硫入口和总排口平均含量分别为0.082 mg/m^(3)(0~0.331 mg/m^(3))和0.060 mg/m^(3)(0~0.254 mg/m^(3)),占CPM的比例分别为4.95%和10.1%;钢铁厂CPM中有机组分含量和比例均高于电厂,脱硫入口CPM中有机组分平均含量为1.94 mg/m^(3)(0.408~3.98 mg/m^(3)),占比为22.2%,经过污控措施净化后总排口CPM中有机组分平均含量为0.382 mg/m^(3)(0.149~0.572 mg/m^(3)),占比为11.1%。燃煤电厂CPM中有机组分主要为酯类,钢铁厂CPM中有机组分主要为烷烃类和烷酸类。2类固定源CPM中有机组分占比均相对较低,其无机组分减排工作应予以更多重视。Nowadays,the retrofit of ultra-low emission has been finished in most coal-fired power plants,and are in process in iron and steel plants in China.The concentration of filterable particulate matters(FPM) has been greatly reduced and condensable particulate matters(CPM) have aroused more attention.The fraction of organic matter in CPM emitted from coal-fired power plants(CFPPs) and iron and steel plants remained controversial,which was important to understand the formation mechanism and to promote the emission control of CPM.We collected CPM samples by in-direct dilution method in eight CFPPs and three iron and steel plants(including two sintering and one coke making plants),and specific compositions and fraction of organic matter in CPM were analyzed.The results showed that the concentration of organic compositions from CFPPs was 0.082 mg/m~3(0~0.331 mg/m~3) and 0.060 mg/m~3(0~0.254 mg/m~3) at the inlet of flue gas desulfurization and stack,accounting for 4.95% and 10.1% of total CPM content,respectively.For iron and steel plants,the concentration and proportion of organic matter were higher in comparison with those from CFPPs,which were 1.9 mg/m~3(0.408~3.98 mg/m~3) and 0.382 mg/m~3(0.149~0.572 mg/m~3) at the inlet of flue gas desulfurization and stack,accounting for 22.2% and 11.1% of total CPM content respectively.Major compositions of organic matter in CPM from CFPPs were esters,whereas alkanes and alkanoic acids were the major composition in CPM from iron and steel plants.In a word,the fractions of organic matter at two kinds of stationary sources were relatively low,more attention should be paid on controlling its inorganic gas precursors.

关 键 词：钢铁厂 燃煤电厂 可凝结颗粒物(CPM) 稀释间接法 有机组分 

分 类 号：X773[环境科学与工程—环境工程] X757