电化学氧化法处理燃煤电厂高盐氨氮废水研究  

Research on High Salt Ammonia Nitrogen Wastewater Treatment from Coal-Fired Power Plant by Electrochemical Oxidation

作　　者：王亮 钱晓峰 孙伟钢 陈琍 施耀[2] 何奕[2] WANG Liang;QIAN Xiaofeng;SUN Weigang;CHEN Li;SHI Yao;HE Yi(Zhejiang Zheneng Jiahua Power Plant Co.Ltd.,Jiaxing 314201,China;Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江浙能嘉华发电有限公司,浙江嘉兴314201 [2]浙江大学,浙江杭州310027

出　　处：《水处理技术》2020年第12期94-99,共6页Technology of Water Treatment

基　　金：浙江省能源集团重点科技项目(31233018001)。

摘　　要：以某大型燃煤电厂的脱硫废水,精处理再生废水为研究对象,在分析其水质特性后,设计了一套电化学氧化降解氨氮的中试装置,通过改变水温、电流密度、停留时间,溶解性总固体(TDS),初始氯根浓度、电极表面清洁度等实验条件,研究了对影响氨氮降解的因素。结果表明,电解可降低燃煤电厂高盐氨氮废水中的氨氮及COD,但不能降解重金属;电流密度、停留时间、初始Cl^-含量越高,电极表面的清洁度越高,氨氮的降解效果越佳;当水温高于36℃时,氨氮降解效率下降较快。电化学工艺可用于燃煤电厂氨氮废水处理领域,可解决脱硫添加剂使用后脱硫废水COD高的问题。深度电解后的高盐废水还有望作为循环水杀菌剂使用。Taking the desulfurization wastewater and regeneration wastewater from a large coal-fired power plant as the research object, after analyzing the water quality characteristics, a pilot-scale electrochemical oxidation device for ammonia nitrogen removal was designed. By changing the water temperature, current density, residence time, total soluble solids(TDS), initial chloride concentration and surface cleanliness of the electrode, the factors affecting the degradation of ammonia nitrogen were studied. The results showed that electrolysis could reduce ammonia nitrogen and COD in high salt ammonia nitrogen wastewater of coal-fired power plant, but could not degrade heavy metals. The higher the current density, residence time and initial Cl-content, the higher the cleanliness of the electrode surface, the better the removal effect of ammonia nitrogen. when the water temperature was higher than 36 ℃, the degradation efficiency of ammonia nitrogen decreases rapidly. The electrochemical process can be used in the field of ammonia nitrogen wastewater treatment in coal-fired power plants, and it can solve the problem of high COD in desulfurization wastewater after the use of desulfurization additives. High salt wastewater after deep electrolysis is expected to be used as circulating water bactericide.

关 键 词：燃煤电厂 氨氮废水 电解 电流密度 停留时间 

分 类 号：X773[环境科学与工程—环境工程]