烟气温度对电除尘器性能影响的数值模拟

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Abstract To elucidate the effect of flue gas temperature on the performance of the electrostatic precipitator, a three-dimensional numerical simulation study of the electrostatic precipitator was conducted through commercial Computational Fluid Dynamics (CFD) software. The overall coupling of electric field, flow field, particle field, and temperature were successfully created through a User Defined Functions (UDF). The results showed that the average turbulence intensity could be reduced with the increase of the flue gas temperature that ranged from 20℃ to 400℃ under the same inlet mass. In addition, it was explored that the average field strength would decrease from 4.9×10⁵V/m to 1.4×10⁵V/m, and 0.971mA/m² to 0.261mA/m² for the average plate current density under the same condition, and the ion wind effect was decreased as well. However, the uniformity of the plate current density distribution gradually improved with the temperature increase. More importantly, the particle trajectory line was elongated with the increased temperature under the same volume flow, but the overall particle capture efficiency was decreased. It can be summarized that the decreased temperature could effectively improve the dust removal efficiency of the electrostatic precipitator.

Key words： temperature electrostatic precipitator numerical simulation dust removal efficiency

Received: 22 October 2020

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X51

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	YAN Dong-jie
	ZHUANG Qian
	YU Ya
	DING Liu
	ZHANG Zi-ang

Cite this article:

YAN Dong-jie,ZHUANG Qian,YU Ya等. Numerical simulation of the effect of temperature on the performance of electrostatic precipitator[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(6): 2577-2585.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I6/2577

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