| 摘要 |
An aeration stone for supplying heated air to a dust collecting hopper of an electric precipitator of a thermal power plant is provided to pass the air heated at high temperature, to restrain the backflow of flyash, and to secure high thermal stability. An aeration stone(40) for supplying heated air to a dust collecting hopper(22) of an electric precipitator of a thermal power plant is installed at the dust collecting hopper to make the heated air pass the dust collecting hopper so that flyash collected in the dust collecting hopper is attached on the inner wall of the dust collecting hopper. The aeration stone is made of a composition. A composition is produced by mixing Al2O3(Aluminum Trioxide) of 90wt.%, diatomaceous earth of 2wt.%, TiO2(Titanium Dioxide) of 2.8wt.%, Fe2O3(Iron Oxide) of 0.1wt.%, SiO2(Silicon Dioxide) of 2.3wt.%, MgO(Magnesium Oxide) of 1.3wt.%, illite of 0.3wt.%, wollastonite of 0.4wt.%, zirconia of 0.3wt.%, fluorite of 0.3wt.%, and lithium oxide of 0.2wt.%. |
