化工进展2019，Vol.38Issue(3)：1524-1529,6.DOI:10.16085/j.issn.1000-6613.2018-1238
双极膜电渗析法连续制备聚合硫酸铁
Bipolar membrane electrodialysis process for preparing polyferric sulfate continuously
摘要
Abstract
Bipolar membrane electrodialysis (BMED) was used to prepare polyferric sulfate (PFS) continuously. Effect of current density and molar ratio of FeSO4 to H2 SO4 in feed and feed flow rate on the properties (basicity, total iron content, pH, density, etc.) of PFS and process energy consumption was investigated. Results show that when current density increased from 10 mA/cm2 to 20 mA/cm2, basicity and turbidity removal ratio increased from 8.59％ to 11.32％ and from 84.31％ to 95.34％, respectively.However, when current density was greater than 20 mA/cm2, turbidity removal ratio and basicity decreased slightly, while process energy consumption increased up to 4.26 kW·h/kg H2 SO4 and the acid concentration in acid compartment rose to 0.45 mol/L. In addition, as the molar ratio of FeSO4 to H2 SO4 in feed increased from 2.01 to 4.08, basicity increased from 8.69％ to 11.38％, turbidity removal ratio increased gradually from 94.96％ to 95.88％, while the process energy consumption changed in a small range of 3.05-3.15 kW·h/kg H2 SO4 and the acid concentration in acid compartment was about 0.38 mol/L. Finally, as feed flow rate increased from 1 to 3 mL/min, basicity reduced from 11.52％ to 6.75％, turbidity removal ratio decreased gradually from 95.92％ to 75.61％ and the process energy consumption decreased from 3.09 to2.77 kW·h/kg H2 SO4.关键词
电渗析/聚合硫酸铁/絮凝/盐基度/双极膜Key words
electrodialysis/polyferric sulfate/coagulation/basicity/bipolar membrane分类
化学化工引用本文复制引用
吕燕,韩建华,田智灏,张旭..双极膜电渗析法连续制备聚合硫酸铁[J].化工进展,2019,38(3):1524-1529,6.基金项目
国家自然科学基金(21606063) （21606063）
安徽省自然科学基金(1608085QB41) （1608085QB41）
