二次铝灰超声波强化湿法脱氮工艺研究与应用  

Study and Application of Secondary Aluminum Ash Ultrasonic Strengthening of Wet Denitrogenation Process

作　　者：李晓辉 黄雪约 张毅 梁辉 夏盛 LI Xiao-hui;HUANG Xue-yue;ZHANG Yi;LIANG hui;XIA Sheng(Guangxi Zhuang Autonomous Region Solid Waste and Chemical Environmental Management Center,Nanning,Guangxi 530028,China;Guangxi Fenghua Environmental Protection Technology Co.,Ltd.,Baise,Guangxi 531500,China)

机构地区：[1]广西壮族自治区固体废物和化学品环境管理中心,广西南宁530028 [2]广西锋华环保科技有限公司,广西百色531500

出　　处：《云南冶金》2022年第4期91-96,共6页Yunnan Metallurgy

基　　金：2017年广西创新驱动发展专项“尾矿库及冶炼矿渣环境风险识别和生态化处置关键技术开发及应用示范”(桂科AA17204066)。

摘　　要：针对水处理剂聚合氯化铝新国标增加氨氮≤0.05%的指标而传统铝灰湿法脱氮生产聚合氯化铝工艺无法满足要求的问题,提出了在传统工艺上增加超声波和爆气装置提高脱氮速率的方法。该方法在实验室条件下反应150 min后氮含量降到0.05%。工业化应用中,在超声波覆盖率50%,爆气速率1/6的情况下,反应3 h后氮含量降到0.05%,对比传统工艺反应时间需要8 h,在反应速率上有明显提高。In new national standard of water treatment chemical of aluminum chlorohydrate,it is increased the requirement of ammonia nitrogen amount≤0.05%,but the traditional aluminum ash wet denitrogenation for production of aluminum chlorohydrate cannot meet the requirement,therefore,it is proposed to increase ultrasonic wave and gas blasting device to increase denitrogenation velocity.By using this method,the reaction last for 150 min under lab conditions,the nitrogen content was decreased to 0.05%.In industrial application,when ultrasonic coverage is 50%,the explosive gas rate is 1/6,the reaction time lasted for 3 h,the nitrogen content was decreased to 0.05%,the reaction time of traditional process is 8 h,the reaction velocity has obviously improved.

关 键 词：铝灰湿法脱氮 聚合氯化铝 超声波 爆气 

分 类 号：TQ133.1[化学工程—无机化工] O644.3[理学—物理化学]