Abstract:Four surfactants CTAB, SDBS, AEO-9 and OP-10 were used for washing liquids preparation respectively. The removal of hydrophobic powdered carbon was carried out with a bevel edge scrubber. The effects of surfactants, inlet dust concentration, superficial gas velocity, and liquid-gas ratio on dust removal efficiency (η) and pressure drop (ΔP) were discussed. Furthermore, the dewatering performance of the bevel edge scrubber was evaluated. The bevel edge scrubber had high removal efficiency, low pressure drop, and good dewatering performance. Meanwhile, four washing liquids could greatly improve the dust removal efficiency. And the washing liquid of AEO-9 had the optimal removal effect. When AEO-9 concentration was 0.07mmol/L, inlet dust concentration was 5g/m3, L/G was 1.0L/m3, and superficial gas velocity was 2.5m/s, the removal efficiency reached 99.99%. The inlet dust concentration had little effect on ΔP, whereas L/G and superficial gas velocity had much influence on it. The water content in outlet flue gas was less than 11g/kg(dry) under the experimental condition.