Ezperimental Study on the Electrostatic Precipitability for the High-Alumina Fly Ash of Burning ZHUNGEER Coal in China
Electrostatic precipitators (ESP) are widely used in coal fired power plants for control of particulate. In recent years, the efficiency of ESP has obviously decreased when the power plant burned the high-alumina coal, especially in western China, and it is difficult to reach the emission standard. In order to find the reason that the high-alumina fly ash influences the efficiency of ESP, the fly ash in entrance and exit of ESP has been sampled. By analyzing their chemical composition, resistivity and adhesive force, using the dust electrical resistivity test instrument and adhesive force test apparatus invented by self-independence, and testing the current-voltage curve of the fly ash under operating the ESP. The results show when the content of Al2O3 in the fly ash in entrance and exit of ESP is 44.2％ and 47.8％, the resistivity of fly ash is over 1012 Ω·cm, but it doesnt cause the obvious reverse corona. The adhesive force of the highalumina fly ash is very little, and the fly ash is sensitive to the smoke speed in electric field, dust re-entrainment is easy to produce, so the efficiency of EPS decreases.
high-alumina fly ash ESP resistivity
Qi Liqiang Yuan Yongtao
School of Environmental Science and Engineering, North China Electric Power University Baoding, China 071003
国际会议
上海
英文
3805-3808
2008-05-16（万方平台首次上网日期，不代表论文的发表时间）