为了处理燃煤电厂排放的高氯脱硫废水、解决烟道气氯元素质量分数不足及选择性催化还原催化剂对Hg⁰氧化效率较低等问题，利用电解法降低脱硫废水中的氯离子质量分数，并将电解产物回喷入烟道内，提高Hg⁰氧化效率。研究了电流和氯离子初始质量浓度对脱硫废水中Cl^-脱除量和阳极电解产物中Cl₂所占比例的影响。考察了不同条件下的电解脱硫废水阳极液产物回喷到烟道内对SCR催化剂氧化Hg⁰的效率的影响。随着电流和氯离子初始质量浓度的增加，脱硫废水中的Cl^-脱除量有所增加，阳极电解产物中Cl₂所占比例也有增加的趋势。将不同电解脱硫废水阳极液产物回喷至燃煤烟气中，SCR催化剂对Hg⁰氧化效率明显提升。

To deal with high-chlorine desulfurization wastewater discharged from coal-fired power plants, and solve the problems that chlorine content in flue gas is insufficient and selective catalytic reduction catalyst exhibits low efficiency of for Hg⁰ oxidation of coal-fired power plants in China, the electrolysis method is employed to reduce chloride ion content in the desulfurization wastewater, and spray the electrolysis product back into the flue to improve the oxidation efficiency of Hg⁰.The effects of current size and initial chloride ion concentration on the amount of Cl^- removed from desulfurization wastewater and the proportion of Cl₂ in the anode electrolysis product are studied.Afterwards, the effect of the sprayed back anolyte products of electrolytic desulfurization wastewater under different conditions on the oxidation efficiency of Hg⁰ by SCR catalysts are studied.With the increases of current sizes and initial chloride ion concentration, both the amount of Cl^- removed from desulfurization wastewater and the proportion of Cl₂ in the anode electrolysis product increase.As the anolyte products of different electrolytic desulfurization wastewater are sprayed back into the coal-fired flue gas, the oxidation efficiency of Hg⁰ over SCR catalysts is improved significantly.

纪明轩(1996-),男,硕士研究生,主要研究方向为燃煤电厂烟气脱硝脱汞,2019202050097@whu.edu.cn