Influence of SO3 in flue gas on electrostatic precipitability of high-alumina coal fly ash from a power plant in China

The specific resistance of the fly ash was found to be 2.0 × 1013 Ω·cm without SO3, whereas it was 3.43 × 1011 Ω·cm after SO3 conditioning. The resistivity of the fly ash in the flue gas decreased by approximately two orders of magnitude; thus, the effect of FGC is remarkable.1. Test probe. 2. High-resistance test apparatus. 3. Deflating facility. 4. Micro-differential piezometer.