Multi-Pollutant Control for Flue Gases by Xiang Gao & Chenghang Zheng & Pen-Chi Chiang & Kefa Cen

Author:Xiang Gao & Chenghang Zheng & Pen-Chi Chiang & Kefa Cen
Language: eng
Format: epub
ISBN: 9789811615184
Publisher: Springer Singapore

The influences of precharging and applied voltage on particle migration velocity are compared for three typical fine and ultrafine particle size categories in Fig. 3.54a. The migration velocity across the entire voltage range was improved using the precharger, with more drastic improvements for smaller particles; the migration velocity increased by 69.9, 65.7, and 34.2% for PM0.1, PM1.0, and PM2.5, respectively. In real power plants, WESPs are usually operated under saturated gas conditions with a gas temperature below 50 °C. Under such conditions, heterogeneous vapor condensation on a particle’s surface can occur. The influence of gas temperature on collection efficiency was investigated in the range of 36.7–51.4 °C; as shown in Fig. 3.54b, particle collection efficiency increased with decreasing gas temperature.

Fig. 3.54a Particle migration velocity improved by the precharger and b overall collection efficiency under different gas temperatures [82]

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