电渗析盐水浓缩过程中有机酸及其盐迁移规律研究  

Study on migration of organic acids and their salts during electrodialysis brine concentration processes

作　　者：梁杰 刘杰 袁俊生[1,2,3] 纪志永[1,2,3] 赵颖颖 郭小甫[1,2,3] 李非 王士钊 LIANG Jie;LIU Jie;YUAN Jun-sheng;JI Zhi-yong;ZHAO Ying-ying;GUO Xiao-fu;LI Fei;WANG Shi-zhao(School of Chemical Engineering,Hebei University of Technology,Tianjin 300130,China;Engineering Research Center of Seawater Utilization Technology of Ministry of Education,Tianjin 300130,China;Modern Marine Chemical Collaborative Innovation Center of Hebei Province,Tianjin 300130,China)

机构地区：[1]河北工业大学化工学院,天津300130 [2]海水资源高效利用化工技术教育部工程研究中心,天津300130 [3]河北省现代海洋化工技术协同创新中心,天津300130

出　　处：《高校化学工程学报》2021年第4期624-631,共8页Journal of Chemical Engineering of Chinese Universities

基　　金：河北省重点研发计划项目(18394008D);河北省科学技术厅+河北工业大学科技创新战略资助项目(20180401)。

摘　　要：针对电渗析法含盐水浓缩过程中有机物迁移对高浓度盐水纯度及后续蒸发结晶过程的影响,开展了有机物电解质在电渗析过程中的迁移规律的研究。选择苯甲酸、苯甲酸钠、柠檬酸、柠檬酸钠4种典型有机物,研究了电流、NaCl浓度、有机物浓度、淡室溶液pH等因素对上述有机物迁移通量的影响。实验结果表明,有机酸及其盐的迁移通量随着电流、有机物初始浓度、淡室pH的增加而增加,随着氯化钠初始浓度的增加而降低。有机酸及其盐的电迁移受离子化程度、分子尺寸及结构共同影响,不同条件下上述作用对有机物迁移过程影响程度不同。而在恒定电流下,NaCl浓度、有机物浓度、淡室溶液pH和有机物种类对NaCl和水的迁移均无明显影响。The migration of organic electrolytes in the electrodialysis concentration process was investigated,which can affect the purity of high salinity brine and the operation of subsequent evaporation and crystallization processes.Four typical organics(benzoic acid,sodium benzoate,citric acid,and sodium citrate)were selected.Effects of current,NaCl concentration,organics concentration,and pH value on the migration flux were studied.The results show that the migration flux of organic acids and their salts increased with the increase of current,initial concentration of organics,and pH value of dilute solution,and decreased with the increase of initial concentration of NaCl solution.The migration of organic acids and their salts was affected by the degree of ionization,molecular size,and molecular structure,which showed different effects on the migration process of organics under different conditions.The concentration of NaCl and organics and the pH value have few effects on the migration of NaCl and water with constant current in this experiment.

关 键 词：电渗析 盐水浓缩 含盐废水 有机弱电解质 

分 类 号：P747.3[天文地球—海洋科学] TE645[石油与天然气工程—油气加工工程]