Current Density and Efficiency of a Novel Lab ESP for Fine Particles Collection
Understanding the current density will help to improve the ESPs energy consumption and the collection efficiency of fine particles. In this study, corona current density and dust collection efficiency were studied with a laboratory ESP.Dust collection experiments were performed with various electrode distances from 22 mm to 330 mm, and also with a single discharge electrode. Discharge for 40 to 50 seconds with 46 kV voltage, 160 g/m3 inlet dust concentration and 700 m3/h flow rate. Ash layer thickness collected on the plate is about 4 mm on average. We observed that the total currents are greatly influenced by the plate-plate gap and electrode distance. The maximum total current was obtained in the 132 mm discharge electrode distance (about half of the plate-plate gap width). The operating voltage range of positive corona is only about half that of the negative corona. Dust layer Accumulation on the plate reduced the total collection current, and increased the spark voltage about 4 kV with 4 mm dust thickness. Increase in the discharge electrode number of the outlet field can improve fine particles collection efficiency.
current density corona ash electrostatic precipitation
ZHU Jibao SHI Yao ZHANG Xuming YAN Hui YAN Keping
Institute of Environment Pollution Control Technology,College of Environmental and Resource Sciences,Zhejiang University,Hangzhou,310028,P R China
国际会议
11th International Conference on Electrostatic Precipitation(第11届国际电除尘学术会议)
杭州
英文
65-69
2008-10-15（万方平台首次上网日期，不代表论文的发表时间）