Electrostatic removal of ultrafine carbon black with square-grooved collecting plates:Insights for capturing black carbon emitted from ships  

作　　者：Zhicheng Wu YifanWang Lingyu Shao Hao Zhang Haobo Dai Haidong Fan Chenghang Zheng Xiang Gao 

机构地区：[1]State Key Lab of Clean Energy Utilization,State Environmental Protection Engineering Center for Coal-Fired Air Pollution Control,Zhejiang University,Hangzhou 310027,China [2]Department of Earth and Environmental Sciences,University of Manchester,Oxford Road,United Kingdom [3]Zhejiang Tiandi Environmental Protection Engineering Co.,Ltd.,Hangzhou 310012,China [4]Baima Lake Laboratory(Zhejiang Provincial Laboratory of Energy and Carbon Neutrality),Hangzhou 310000,China

出　　处：《Journal of Environmental Sciences》2024年第2期559-569,共11页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation (No.52076191);Key Research&Development Plan of Shandong Province (No.2020CXGC011401)。

摘　　要：Ships and other mobile pollution sources emitted massive ultrafine and low-resistivity particles containing black carbon(BC),which were harmful to human health and were difficult to capture by conventional electrostatic precipitators(ESPs).In this study,nanoscale carbon black was adopted as simulated particles(SP)with similar physicochemical properties for black carbon emitted from ships(SP-BC)to investigate the feasibility of using an ESP with square-grooved collecting plates for the removal of SP-BC at low backpressures.The increased applied voltage significantly improved the total collection of SP-BC whereas may also promote the conversion of relatively larger particle size SP-BC into nano-size below 20nm.The outlet number concentration of SP-BC under 27 kV at 130℃was three times that of the inlet.While the reduction of the flow rate could strengthen the capture of SP-BC below20 nm,and under the combined action of low flow rate and maximum applied voltage,the collection efficiency of 20-100 nm SP-BC could exceed 90%.In addition,the escape and capture characteristics of SP-BC under long-term rapping were revealed.The square-grooved collecting plate could effectively restrain the re-entrainment of collected SP-BC generated by rapping,and the nanoscale SP-BC was trapped in the grooves after rapping.The results could provide insights into the profound removal of massive nanoscale black carbon emissions from mobile sources.

关 键 词：Simulated ship black carbon Electrostatic removal Square-grooved collecting plate Long-term rapping 

分 类 号：X736.3[环境科学与工程—环境工程]