La-Ce-Y-W cathodes application for high temperature electrostatic precipitator
La-Y-Ce-W cathode was prepared by powder metallurgy.XRD,OM,SEM and EDS were applied to analyze the microstructure of the material.La,Ce and Y concentrate on the tungstate particles and exist as Rare Earth (RE) tungstate.The average diameter of the particles is about 30μm.The electron emission properties were measured with self-designed electron emitter surveyor.Its effective work function was 2.76eV at 1300℃.The precipitation efficiency of an electrostatic precipitator (ESP) installed with the cathode was investigated in a certain flue gas condition.It was found that it can trap over 95％ dust particles with diameter bigger than 1 μm.As to dust particles with diameter smaller than 0.1 μm,the efficiency is lower than 85％.Increasing collection voltages showed greater positive effects on the precipitation efficiency of smaller particles than that of larger particles.
Cathode Tungsten Electron emission High temperature electrostatic precipitation
Zhongzhu Gu Jiancan Yang Xiaoli Xi Zuoren Nie Jinjin Xu
College of Power Engineering,Nanjing Normal University,Nanjing 210042,China College of Material Science and Engineering,Beijing University of Technology,Beijing 100022,China
国际会议
哈尔滨
英文
437-441
2010-07-24（万方平台首次上网日期，不代表论文的发表时间）