Research on the electrostatic characteristic of coal-fired fly ash

Abstract

China is the biggest consumer of coal. Every year, half or more of China's coal is used in the power industry. Most thermal power plants in China use electrostatic precipitators to treat solid particulate matter in flue gas. The efficiency of the electrostatic precipitator in removing dust has a considerable influence on atmospheric pollutants. However, the most important factor affecting the efficiency of the electrostatic precipitator in removing dust is the dielectric properties of the fly ash. Through the study of volt-ampere characteristics, electrical and capacitive properties, and electrical breakdown characteristics of coal-fired fly ash, it is found that the V–I characteristics of ash samples in thermal power plant do not strictly follow the formula ( \( R=\frac{U}{I} \) ), the type of coal, and the chemistry of coal. Ingredients are related; disparate types of ash samples have disparate capacitances, and the measurement of capacitive contrast resistance has a certain influence.

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