石墨带电极电容性脱盐试验研究  

EXPERIMENTAL STUDY ON CAPACITIVE DEIONIZATION OF GRAPHITE RIBBON ELECTRODE

作　　者：石胜启[1] 王越[1] 徐世昌[1] 赵雅静[1] 吴雅菲[1] 

机构地区：[1]天津大学化工学院化学工程研究所,天津市膜科学与海水淡化技术重点实验室,天津300072

出　　处：《水处理技术》2013年第1期29-32,共4页Technology of Water Treatment

基　　金：国家自然科学基金(20806054);天津市应用基础及前沿技术计划(09JCYBJC06600)

摘　　要：以超级电容器专用石墨带为电极吸附材料,钛板为集流体,2者间通过导电胶粘结的方式制得电容法脱盐(CDI)用双面石墨带电极,并组装了由10对石墨带电极构成的CDI串联脱盐装置。考察了不同原料液盐含量、流量和极板间电压对CDI装置脱盐性能的影响规律。结果表明,不同操作条件下,CDI装置的出水电导率随运行时间均呈近似于"正弦波"的变化规律。当原料液盐的质量浓度在400～800 mg/L时,系统脱盐率最大可达35%,产水率和比能耗分别保持在32%～33%和0.9～1.2 kWh/m3;当极板间电压由2.0 V增大至4.0 V时,系统脱盐率由31%提高到41%,产水率由28%增大到40%,产水比能耗增加了近1倍;当原料液体积流量由1.5 L/h增大到4.5 L/h,系统脱盐率由34%降低到28%,产水率由32%降低到27%,产水比能耗变化幅度较小。Capacitive Deionization（CDI） electrodes were fabricated by pasting graphite ribbon onto the titanium plate with conductive adhesive.A serieswound CDI unit with 10 pairs of CDI electrode was assembled and it＇s deionization performance was investigated under different feed concentrations,imposed voltages and the flow rates.Experimental results showed that the conductivity of the effluent appeared as ＂sine wave＂ under the test conditions.Also,when the feed concentration varied from 400～800 mg/L,the ion removal rate of the system can reach to 35%,while both the water recovery rate and the specific energy consumption（SEC） changed in a narrow scope,hovering around 32%～33% and 0.9～1.2 kWh/m3respectively.With the growth of the imposed voltage from 2.0 V to 4.0 V,the ion removal rate increased from 31% to 41%,and the water recovery rate rose from 28% to 40%,however the SEC doubled almostly.With the flow rate increased from 1.5 L/h to 4.5 L/h,the ion removal rate declined from 34% to 28%,the water recovery rate reduced from 32% to 27%,while the SEC varied slightly.

关 键 词：电容法脱盐 石墨带电极 吸附 脱附 脱盐率 比能耗 

分 类 号：P747.99[天文地球—海洋科学]