Hydrodynamic and Mass-Transfer Characteristics of Annular Centrifugal Contactors on the Caprolactam Recovery from Waste Liquor
Hydrodynamic and Mass-Transfer Characteristics of Annular Centrifugal Contactors on the Caprolactam Recovery from Waste Liquor
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DOI：
10.4028/www.scientific.net/amm.330.792
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发表时间：
2013-06
期刊：
影响因子：
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通讯作者：
Yan Xu;K. Tang;Zhi-shan Bai;Hua Lin Wang
中科院分区：
文献类型：
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作者：
Yan Xu;K. Tang;Zhi-shan Bai;Hua Lin Wang
从废水中回收己内酰胺是工业上一个重要而具有挑战性的问题。与广泛应用于己内酰胺回收的萃取塔相比，环形离心萃取塔具有结构紧凑、维护方便、处理量大、效率高、能耗低等特点，其在工业上具有广泛的应用。采用环形离心接触器回收己内酰胺，研究了流量比、重相堰半径和转速对夹带、分离能力和传质效率的影响。实验结果表明，己内酰胺的纯度可达99.99%，最大分离能力为109L，最高传质效率为99.8%。
Caprolactam recovery from waste water is an important and challenging problem in industry. In comparison with extraction columns widely applied in the recovery of caprolactam, annular centrifugal contactor is featured by compact structure, convenient maintenance, and high throughput and efficiency with low energy consumption, etc., which have a wide application in industry. The effects of flow ratio, radius of heavy phase weir and the rotational speeds on entrainment, separation capacity and mass transfer efficiency were studied with annular centrifugal contactors for caprolactam recovery. The results show that the caprolactam with 99.99% purity, the maximum separation capacity of 109L and the highest mass transfer efficiency of 99.8% were obtained.