Based on the Ansys Fluent platform along with its secondary development programs, this research developed a comprehensive numerical model for nano particle migration within an electrostatic precipitator (ESP). The multi-field model coupled sub-models such as flow field, electric field, particle charging, and particle motion. The moving and charging behavior of nano particles in the ESP are fully discussed. The results show that both the amount and the direction of the body force on the particles will change periodically before collecting or escaping. The deposition efficiency curve of the nano particle presents the U-shape which is different from that of the micron particle. It proved that it is resulted from the changes of the main type and magnitude of the body force on the particle. Moreover, the charging mechanism of nano particles will also change. The charge is closely related to the particle size and particle concentration, directly affecting the Coulomb force on particles and corona discharge, which may lead to corona obstruction and seriously lower the particle deposition efficiency.
FENG Yuxuan
,
LUO Kun
,
FAN Jianren
. Particle transport and charging mechanism of the nano particle within an electrostatic precipitator[J]. Journal of University of Chinese Academy of Sciences, 2021
, 38(3)
: 297
-305
.
DOI: 10.7523/j.issn.2095-6134.2021.03.002
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