探讨了双极膜电渗析电解硫酸钠制质量分数4%氢氧化钠和5%硫酸技术中双极膜电渗析电解装置组成,电解硫酸钠制酸碱的原理,电解工艺过程中主要影响因素及膜堆清洗维护注意事项。结果表明,双极膜电渗析电解硫酸钠运行最佳工艺是硫酸钠质量分数10%~11%,盐室温度25~30℃,随着电解时间延长,酸碱室浓度增大,电解效率降低。双极膜使用过后用质量分数2%~3%盐酸清洗保养。

The composition of the bipolar membrane electrodialysis electrolysis device,which is applied in producing 4% sodium hydroxide and 5% sulfuric acid from sodium sulfate through bipolar membrane electrodialysis electrolysis technology,is explored.The principle for electrolyzing sodium sulfate to produce acid and base,the main influencing factors during the electrolysis process,and the precautions for cleaning and maintaining the membrane stack are also studied.Results show that the best process conditions for sodium sulfate electrodialysis with bipolar membrane electrodialysis include a sodium sulfate mass concentration of 10%-11%,and a salt chamber temperature at 25-30℃.The electrolytic efficiency decreases with the extension of electrolytic time,and the bipolar membrane used should be cleaned and maintained with 2%-3% hydrochloric acid.