鉴于烟道气氨法脱硫浆液中F^-的危害性，在基本不影响硫酸铵的前提下采用均相膜电渗析脱除浆液中的F^-，考察了电渗析运行参数和浆液性质对F^-迁移量的影响，并考察了硫酸根的截留效果。结果表明，F^-迁移量随电压和循环流量的增大而增加，但过高的电压会增加能耗，过高的循环流量会降低传质的几率，降低F^-迁移量，均相膜电渗析较佳的运行参数为电压15 V，浓、淡液循环流量为200 L/h。随着温度和F^-初始质量浓度的升高，F^-迁移量增大，（NH₄）₂SO₄质量分数对F^-迁移量影响较小。均相膜电渗析对SO₄^2-的截留效果较好，可以在脱除F^-的同时更好地保留脱硫浆液中资源化回收成分硫酸铵。

In view of the harmfulness of fluoride ion (F^-) in slurry generated by ammonia-route desulfurization of flue gas,the homogeneous membrane electrodialysis is employed to remove F^- on the premise that ammonium sulfate is hardly affected.Influences of electrodialysis operating parameters and slurry properties on F^- migration are studied and the retention effect of sulfate is also investigated.The results show that F^- migration increases with the increases of voltage and circulating flow,but too high a voltage will increase energy consumption and excessive circulating flow will reduce the probability of mass transfer and the amount of F^- migration.The preferred operating parameters for homogeneous membrane electrodialysis include that voltage is 15V,and the circulation flow rates of both concentrated and fresh liquid are 200 L·h^-1.As the temperature and F^- initial concentration increase,F^- migration increases.(NH₄)₂SO₄ concentration has little effect on F^- migration.The homogeneous membrane electrodialysis has better retention effect on SO₄^2-,and can better retain ammonium sulfate in the desulfurization slurry while removing F^-.

陈思(1992-),男,硕士研究生,研究方向为环境设备与材料,18118823667@163.com