摘要
针对某电厂脱硫废水膜浓缩COD含量高且含少量F-等特点,采用标准三电极电化学体系试验研究了2种适用于脱硫废水膜浓缩浓水的DSA阳极材料的电解制氯性能,并考察了电流密度、温度、极板清洗等因素对电解制氯的影响。结果表明:Keramox涂层(不抗氟)电极的制氯性能明显优于MS-0880涂层(抗氟)电极;Keramox涂层电极电解的最佳电流密度为100mA/cm2,最佳温度为20℃,相应的电流效率可达62.6%,直流电耗为4.59(kW·h)/kg;通过定期酸洗可有效恢复电极性能;2种电极的强化寿命均超过30h,满足工业应用要求;在试验工况下,电解制氯过程符合零级动力学方程。
The concentrated desulfurization wastewater in a power plant has relatively high COD content and a certain content of F-,to solve this problem,the standard three electrode chemistry system was applied to investigate the chlorine production performance of two kinds of DSA anode materials tailored for the concentrated desulfurization wastewater electrolysis.Moreover,the effects of current density,temperature,pole plate cleaning and other factors on chlorine producing processes were analyzed.The results show that,the Keramox electrode exhibits significantly better performance than the MS-0880 electrode in chlorine producing processes.The optimal current density is 100mA/cm2 and the optimum electrolytic temperature is 20 ℃for the Keramox electrode as well as the corresponding current efficiency and direct current consumption are 62.6% and 4.59（kW·h）/kg,respectively.Periodic acid pickling can effectively maintain electrode performance.The strengthen lifetimes of both electrodes are more than 30 h,satisfying the industrial application request.The processes of producing chlorine by electrolysis conforms to the zero-order reaction kinetics law under given conditions.
出处
《热力发电》
CAS
北大核心
2016年第9期109-115,121,共8页
Thermal Power Generation
关键词
废水零排放
脱硫废水
膜浓缩
电解制氯
DSA阳极
电流密度
温度
zero discharge of wastewater
desulfurization wastewater
membrane concentration
chlorine production by electrolysis
DSA electrode
current density
temperature
