多面球填料塔的氨吹脱传质速率的影响因素

来源期刊:中南大学学报(自然科学版)2012年第4期

论文作者:汪海涛 周康根 彭佳乐 胡元娟

文章页码:1211 - 1216

关键词:钒冶炼;氨氮废水;吹脱;传质系数

Key words:vanadium extraction; ammonia wastewater; air stripping; mass transfer coefficient

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。

Abstract: 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.

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