Abstract
Electrostatic precipitators (ESPs) have been widely used to remove particles from gas. However, an additional gas pumping system should be utilized to pump the particle-laden gas. A self-pumped ESP is proposed, in which the ESP itself pumps particle-laden gas. The gas flow and particle collection characteristics are evaluated numerically. Results demonstrate that a nearly unidirectional ion wind stream can be generated with a suitable arrangement of electrodes. Particles significantly restrain the corona discharge current and decelerate the gas accordingly. Particles with a smaller diameter and a higher concentration exert a more significant influence on the corona discharge and gas flow. The average velocity of 0.5 m/s at the inlet of the ESP (area of 0.3 m2) is achievable with a voltage of 23 kV and a power consumption of 20 W. A collection efficiency of more than 99 % is achievable for particles with a diameter of 5 µm.
Published Version
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