钢铁行业排放颗粒物粒数浓度排放特征研究
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摘要
钢铁行业排放的颗粒物是影响大气环境的重要因素,本研究采用低压荷电粒径谱仪在钢铁企业开展现场实测,直接测定各排放环节除尘器出口颗粒物粒数浓度。结果显示,烧结机头与高炉1的颗粒物粒数浓度较高。本研究根据烟气排放量确定颗粒物体积排放速率,结合几何平均粒径分析钢铁企业各环节的颗粒物排放特征。结果表明,高炉1排放颗粒物体积浓度最大,且1μm以下颗粒物占比较大,烧结机尾、推焦与装煤环节颗粒物排放较低。
Iron and steel industry is one of the most important factors influencing particulate pollution in the ambient air. Electrical low-pressure impaction was utilized in the iron and steel factory on-site emission measurement in this study. Particulate number concentration emitted from sintering machine head and blast furnace 1 was relatively higher. Particulate volume emission velocity was estimated with exhaust gas condition. The characteristic of geometric average particulate diameter was analyzed for each production section. The result shows that blast furnace had the highest particle volume concentration, with large percentage contributed by particles smaller than 1 μm. Other process had relatively lower particles emission.
Iron and steel industry is one of the most important factors influencing particulate pollution in the ambient air. Electrical low-pressure impaction was utilized in the iron and steel factory on-site emission measurement in this study. Particulate number concentration emitted from sintering machine head and blast furnace 1 was relatively higher. Particulate volume emission velocity was estimated with exhaust gas condition. The characteristic of geometric average particulate diameter was analyzed for each production section. The result shows that blast furnace had the highest particle volume concentration, with large percentage contributed by particles smaller than 1 μm. Other process had relatively lower particles emission.
引文
1 Williams R,Creason J,Zweidinger R,etal.Indoor,outdoor,and personal exposure monitoring of particulate air pollution:the Baltimore elderly epidemiology-exposure pilot study[J].Atmospheric Environment,2000,(34):4193-4204.
2 Swift D L.The oronasal airways:the definer and ignored respiratory ozone of the PM10 regulatory convention[J].Inhalation Toxicology,1995,7(1):125-150.
3 Marjamaki M,Keskinen J,Chen DR,etal.Performance evaluation of the electrical low-pressure impactor[J].Journal of Aerosol Science,1999,31(2):249-261.
2 Swift D L.The oronasal airways:the definer and ignored respiratory ozone of the PM10 regulatory convention[J].Inhalation Toxicology,1995,7(1):125-150.
3 Marjamaki M,Keskinen J,Chen DR,etal.Performance evaluation of the electrical low-pressure impactor[J].Journal of Aerosol Science,1999,31(2):249-261.