Study of dust detachment from electric filter electrodes

Results are provided for a study of detachment with impact action for dust deposited in an electric corona discharge field on electric filter electrode plates. It is established that a significant factor determining the level of acceleration required for dust detachment from electrodes is the weight of dust accumulated on electrodes before shaking. With an increase in dust weight on electrodes the level of acceleration required may be reduced. It is shown that consideration of the mutual distribution of captured dust before shaking and the level of acceleration over an electric filter electrode surface makes it possible to reduce the amount of impact action. The applicability of the method proposed for evaluating the level of acceleration on electric filter electrode plates by means of a magnet is demonstrated. This is sufficient for analyzing the accuracy and reliability of results obtained. In order to increase the life of electric filter electrode structures it is recommended to perform impact action in an area of least dust accumulation, and also to calculate the minimum impact action and time of application taking account of the optimum amount of dust before shaking and distribution of this amount with time over an electrode.