【摘要】 利用沿面放电等离子体反应器氧化烟气中单质汞,考察了放电长度、弹簧螺距、高压电极线径、汞初始浓度、烟气温度以及喷射体系与湿法脱硫系统联合等因素对单质汞氧化的影响。结果表明:能量密度为3.9 J/L,放电长度为200 mm,弹簧螺距为6 mm,线径为1 mm,单质汞初始浓度为100μg/m~3,烟气温度为110℃,能够实现单质汞91.3%的氧化率。增大放电长度和高压电极线径能够促进单质汞的氧化;高浓度单质汞和升高烟气温度不利于单质汞的氧化;联合活性物质喷射与钙基湿法脱硫系统可以实现烟气中汞的有效脱除。更多还原

【Abstract】 In the study, surface non-thermal discharge plasma was proposed to oxidize Hg~0 in coal-fired flue gas, and the influence factors including the discharge length, the screw pitch, the spring wire diameter, initial Hg~0 concentration, flue gas temperature and wet calcium FGD were studied. The results show that when the energy density is 3.9 J/L, the discharge length is 200 mm, the spring pitch is 6 mm, the wire diameter is 1 mm, the initial concentration of elemental mercury is 100 μg/m~3, and the flue gas temperature is 110 °C, the oxidation rate of elemental mercury can achieve 91.3%. Increasing discharge length, screw pitch and the spring diameter was favorable for oxidizing Hg~0. Higher initial concentration resulted in lower Hg~0 oxidation efficiency. Increasing flue gas temperature reduced the Hg~0 oxidation. The combination of the active species injection and wet calcium FGD was helpful for Hg removal.更多还原