Investigation on condensable particulate matter emission characteristics in wet ammonia-based desulfurization system

查看全文 作　　者：Rongting [1]Huang;Hao [2]Wu;Linjun [1]Yang

机构地区：[1]Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education,Southeast University,Nanjing 210096,China;[2]School of Energy and Mechanical Engineering,Nanjing Normal University,Nanjing 210023,China

出　　处：《Journal of Environmental Sciences》索引2020年第32卷第6期,共11页

基　　金：supported by the National Key Research and Development Program of China(No.2016YFC0203703);the National Natural Science Foundation of China(Nos.51576039,51806107 and 21276049);the Scientific Research Foundation of Graduate School of Southeast University(No.YBJJ1610);the Research Innovation Program for College Graduates of Jiangsu Province(No.KYLX16_0283)。 摘　　要：Particulate matter emissions from ammonia-based wet flue gas desulfurization(AmmoniaWFGD)systems are composed of a filterable particulate matter and a condensable particulate matter(CPM)portion.However,the CPM part has been ignored for a long time,which results in an underestim ation of the aerosol problems caused by Ammonia-WFGD systems.In our research,the characteristics of the CPM that emits from an Ammonia-WFGD system are investigated experimentally for the first time,with the US Environmental Protection Agency Method 202 employed as the primary measurement.The influences of some essential desulfurizing parameters are evaluated based on the experimental data.The results show that CPM contributes about 68.8%to the total particulate matter emission.CPM consists mainly of ammonium sulfates/sulfites,with the organic part accounting for less than 4%.CPM is mostly in the submicron fraction,about 71.1%of which originates from the NH3-H2O-SO2 reactions.The appropriate adjustments for the parameters of the flue gas and the desulfurizing solution can inhibit CPM formation to different extents.This indicates that the parameter optimizations are promising in solving CPM emission problems in Ammonia-WFGD systems,in which the pH adjustment alone can abate CPM emission by around 49%.The opposite variations of the parameters need attention because they can cause tremendous CPM emission increase. 关键词：Ammonia-based WFGD Aerosol emission Condensable particulate matter(CPM) Ultrafine particles Emission control

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Investigation on condensable particulate matter emission characteristics in wet ammonia-based desulfurization system

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引证文献(6)

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