蒸氨工艺处理高氨氮废水的应用及运行优化
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摘要
以某化工高NH_3-N废水处理工程为背景,介绍了其核心蒸氨系统的工艺流程、操作方法、正常生产指标及运行效果。采用正交试验方法研究了进水流量、塔底温度及液氨管温度对回收氨水浓度的影响,同时得出系统的最佳的运行工况为进水量2.5 m~3/h,塔底温度105℃,液氨管温度50℃。在此条件下控制蒸氨系统的运行,废水的NH_3-N去除率达到90%以上,同时产生纯氨水NH_3-N质量分数在15%以上。最后总结了蒸氨塔在使用过程中可能出现的问题及解决措施。蒸氨工艺脱氮效率高、技术成熟、流程简单、操作方便,具有很大的经济价值及应用推广价值。
The treatment process,process parameters,operating results,common problems and the countermeasures of ammonia still system were introduced based on a high ammonia wastewater treatment project.The impact of some technical parameters such as water flow,column bottom temperature and liquid ammonia pipe temperature on ammonia concentration were investigated through orthogonal experiment.The results showed that the optimal operation condition wrer as followed:the amount of water 2.5 m~3/h,the temperature of tower bottom 105 ℃, the temperature of ammonia pipe 50 ℃.Under the condition,the removal rate of ammonia nitrogen in wastewater reached over 90%. Meanwhile, the ammonia water,whose concentration was above 15% was got as a by-product. Finally,the likely problems and the solution measures were also summarized.The ammonia still process had the advantages of nitrogen removal efficiency, mature technology, simple process and convenient operation, which had great economic value and application promotion value.
The treatment process,process parameters,operating results,common problems and the countermeasures of ammonia still system were introduced based on a high ammonia wastewater treatment project.The impact of some technical parameters such as water flow,column bottom temperature and liquid ammonia pipe temperature on ammonia concentration were investigated through orthogonal experiment.The results showed that the optimal operation condition wrer as followed:the amount of water 2.5 m~3/h,the temperature of tower bottom 105 ℃, the temperature of ammonia pipe 50 ℃.Under the condition,the removal rate of ammonia nitrogen in wastewater reached over 90%. Meanwhile, the ammonia water,whose concentration was above 15% was got as a by-product. Finally,the likely problems and the solution measures were also summarized.The ammonia still process had the advantages of nitrogen removal efficiency, mature technology, simple process and convenient operation, which had great economic value and application promotion value.
引文
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[2]刘亚敏,郝卓莉.高氨氮废水处理技术及研究现状[J].水处理技术,2012(S1):7-11.
[3]黄军,邵永康.高效吹脱法+折点氯化法处理高氨氮废水[J].水处理技术,2013,39(8):131-133.
[4]饶力,汪晓军,陈振国,等.响应面法优化MAP法处理高浓度氨氮废水的研究[J].工业水处理术,2015,35(6):61-64.
[5]沈连峰,苗蕾,宋海军,等.蒸氨塔处理高浓度剩余氨水的应用研究[J].给水排水,2012,38(8):58-60.
[6]王元月,魏源送,张树军.厌氧氨氧化技术处理高浓度氨氮工业废水的可行性分析[J].环境科学学报,2013,33(9):2 359-2 368.
[7]俞彬,陈广升,王玉慧,等.A/O+BAF工艺处理高氨氮煤化工废水[J].中国给水排水,2013,29(6):81-83.
[8]刘立国,王艳,朱保成,等.A/O+MBR工艺处理高氨氮煤化工污水工程实例[J].工业水处理,2017,37(3):101-103.
[9]张永昊,韩逸,钱秋杰,等.微电解、Fenton氧化和生化组合工艺处理医药中间体废水[J].环境科技,2017,30(1):16-20.
[10]郭秀玲,马弘,魏美迎,等.直接蒸氨工艺与间接蒸氨工艺的比较[J].煤化工,2009(1):48-50.
[11]海全胜,李万众.剩余氨水蒸氨工艺及设备探讨[J].煤化工,2009(6):48-51.
[12]侯文贵,曲玉新,刘宝菊,等.大孔导向筛板在蒸氨塔的应用[J].燃料与化工,2015,46(1):46-48.
[13]韩洪军,侯宝林,贾胜勇,等.响应面法优化电Fenton深度处理煤化工废水[J].哈尔滨工业大学学报,2015,47(6):45-49.
[14]周乃磊,王中琪,徐旭东.采用Fenton/UV处理金属切削液废水的试验研究[J].环境科技,2009,22(6):6-9.