电化学氧化法处理燃煤电厂高盐氨氮废水  

Electrochemical Oxidation Method for Treating High Salt Ammonia Nitrogen Wastewater from Coal-fired Power Plants

作　　者：赵元成 Zhao Yuancheng(Shanxi Lu'an Ronghai Power Generation Co.,Ltd.,Changzhi Shanxi 046204,China)

机构地区：[1]山西潞安容海发电有限责任公司,山西长治046204

出　　处：《山西化工》2024年第11期252-254,282,共4页Shanxi Chemical Industry

摘　　要：为提高燃煤电厂高盐氨氮废水处理率,根据电化学氧化法处理高盐氨氮废水的技术原理,取某燃煤电厂高盐氨氮废水样品,采用LHB-2型电解质次氯酸钠发生装置电解脱硫废水、精处理再生废水,通过电流密度、水温和停留时间实验进行高盐氨氮废水降解评价。结果表明:电化学氧化法电流密度、水温、停留时间和氯根质量浓度均会影响废水的降解效率。在恒定水流量下,电流密度越大,降解氨氮质量浓度越大。随着水温不断上升,氨氮降解质量浓度逐渐降低。废水停留时间越长,脱除氨氮效率越高。水温为26℃时,初始氯根质量浓度越高,则脱除效率越大。在电流密度为240 A/m^(2)、水温为26℃、停留时间为2 min和氯根质量浓度为9 000 mg/L条件下,高盐氨氮废水处理效果可以达到最佳。In order to improve the treatment rate of high salt ammonia nitrogen wastewater in coal-fired power plants,based on the technical principle of electrochemical oxidation method for treating high salt ammonia nitrogen wastewater,a sample of high salt ammonia nitrogen wastewater from a coal-fired power plant was taken.LHB-2 electrolyte sodium hypochlorite generator was used to electrolyze desulfurization wastewater and fine treat regenerated wastewater.The degradation evaluation of high salt ammonia nitrogen wastewater was carried out through experiments on current density,water temperature,and residence time.The results indicate that the current density,water temperature,residence time,and chloride ion concentration of the electrochemical oxidation method all affect the degradation efficiency of wastewater.At a constant water flow rate,the higher the current density,the greater the concentration of degraded ammonia nitrogen.As the water temperature continues to rise,the concentration of ammonia nitrogen degradation gradually decreases.The longer the retention time of wastewater,the higher the efficiency of removing ammonia nitrogen.When the water temperature is 26 ℃,the higher the initial concentration of chloride ions,the greater the removal efficiency.Under the conditions of a current density of 240 A/m^(2),a water temperature of 26 ℃,a residence time of 2 minutes,and a chloride ion concentration of 9 000 mg/L,the optimal treatment effect of high salt ammonia nitrogen wastewater can be achieved.

关 键 词：电化学氧化法 燃煤电厂 高盐氨氮废水 

分 类 号：X703.1[环境科学与工程—环境工程]