双极性膜电渗析法在脱硫废液NaHSO3再生过程中的应用研究

介绍了用双极性膜电渗析法对烟气脱硫废液（ＮａＨＳＯ３）进行再生的方法，使用自制均相双极膜和上海产异相双极性膜，配以均阳相离子交换膜，均能以满意的转化率（８０％以上）实现再生，再行过程中电流效率的下降（由８０％左右下降到２０％左右）是由于酸室中氢离子浓度升高所致，脱硫废液中少量到钠的存在对再生过程无明显影响，目前障碍该法实际应用主要的问题是国内试制厝的寿命较短。

Study on the Regeneration or NaHSO3 In the Recovery of SO2 from Flue Gas by Bipolar Membrane Electrodialysis

ipolar membrane electredialysis is adOPted in the regeneration of NaHSO3, which is used as absorbent of SO2from flue gas.When canon-exchange membrane is supplemented with, both homogeneous and heterogeneous biPOlar m6mbranes which are made in our lab and by Shanghai Chemical Factory, respectively,can produce satisfactory conversion ratio (higher than 80%)in the regeneration process. The decrease of current efficiency (from approximately 80% to approximatdy 20%)is resulted from the increase of the concentration of proton in acid chamber.The existence of small amount of Na2So4in NaHSO4 solution doesn't cause much effeCt on regeneration process.The short membrane lifetime hinders the process from getting into practical application.