管式电化学反应器中试处理高浓度含氰废水与经济分析  

Pilot-scale treatment of high-concentration cyanide-containing wastewater by a tubular electrochemical reactor and economic analysis

作　　者：王祎 崔韬 谷青青 施凯强 朱洪威 魏卡佳 韩卫清[1,2] WANG Yi;CUI Tao;GU Qingqing;SHI Kaiqiang;ZHU Hongwei;WEI Kajia;HAN Weiqing(School of Environmental and Biological Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;Key Laboratory of Jiangsu Province for Chemical Pollution Control and Resources Reuse,Nanjing 210094,China;CETC LES Information System Co.Ltd.,Nanjing 210007,China)

机构地区：[1]南京理工大学环境与生物工程学院,南京210094 [2]江苏省化工污染控制与资源化重点实验室,南京210094 [3]中电莱斯信息系统有限公司,南京210007

出　　处：《环境工程学报》2021年第8期2639-2650,共12页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金面上资助项目(52070098)。

摘　　要：基于对高浓度含氰废水处理的重大需求和现有破氰技术的共性缺点,采用管式电化学反应器工艺对西部某化工厂生产过程的高浓度含氰废水进行预处理的中试研究,并与次钠氯碱法和ClO_(2)氧化法进行了对比。以Ti/RuO_(2)为阳极的管式电化学反应器相比于其他工艺有最佳的处理效果,在20 mA·cm^(-2)处理4 h后,对废水中TCN、COD和间苯二腈的去除率分别可以达到81.74%、57.71%和81.33%,长期运行效果也处于最佳。此外,尽管管式电化学反应器的建设成本较高,单位能耗高,但由于该工艺无需加药,其运行成本低廉,仅为次钠氯碱法的13.10%,故总体运行成本较低。同时,还对管式电化学反应器的运行过程进行了参数优化及机理探究。在综合考虑建设、运行和折旧,管式电化学反应器具有良好的应用前景。Based on the great demand for the treatment of high-concentration cyanide-containing wastewater and the shortage of current cyanide removal technologies, a pilot study was carried out on the pretreatment of high-concentration cyanide-containing wastewater in a chemical plant in western China by utilizing a tubular electrochemical reactor process, and it was compared with the chloro-alkali process and the ClO_(2) oxidation process. The tubular electrochemical reactor with Ti/RuO_(2) as anode had the best treatment effect compared with other processes, after 4 h treatment with 20 mA·cm^(-2), the removal rates of TCN, COD and m-phenyldionitrile could reach 81.74%, 57.71% and 81.33%, respectively, and the long-term operation effect was also superior. In addition, the construction cost of the tubular electrochemical reactor was expensive and the unit energy consumption was high, but its operation cost was very low and only 13.10% of that of the chloro-alkali process without chemicals addition. At the same time, the operation parameters of the tubular electrochemical reactor were optimized and its preliminary mechanism was investigated. In comprehensive consideration of construction, operation and depreciation, tubular electrochemical reactor has an excellent economy, reflecting a good market prospect and a broad application field.

关 键 词：除氰 电化学 管式反应器 中试 

分 类 号：X703.1[环境科学与工程—环境工程]