摘要
以钒冶炼厂高浓度氨氮废水为处理对象,设计由多面球填料吹脱塔、吸收塔(填料体积均为1 m3)和吹脱空气、废水、吸收液循环管道系统构成的氨吹脱系统,研究氨氮废水的循环流量、温度与pH,吸收液循环流量和pH以及吹脱空气循环流量等因素对氨氮吹脱速率的影响,得到不同条件下氨的总液相传质系数。研究结果表明:在最佳条件下,氨的总液相传质系数KL=7.2 mm/h。
The removal and recovery of concentrated ammonia from ammonia-nitrogen wastewater from a vanadium extraction process were studied.An air stripping system was built,consisting of multi-face-ball packed stripping tower and adsorption tower,and pipe line system for circulation of the wastewater,adsorption solution and stripping air.The effects of factors such as flow rate,temperature and pH value of the wastewater,flow rate and pH value of HCl adsorption solution,and air flow rate on mass transfer rate of ammonia were investigated.The results show that under the best conditions of stripping and absorption processes,the ammonia stripping mass transfer coefficient KL is 7.2 mm/h.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2012年第4期1211-1216,共6页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(51174238)
关键词
钒冶炼
氨氮废水
吹脱
传质系数
vanadium extraction
ammonia wastewater
air stripping
mass transfer coefficient
