己内酰胺生产废水的铁碳微电解深度处理与机理研究.pdf

己内酰胺生产废水的铁碳微电解深度处理与机理研究 1 1 2 2 1 刘维 ，刘素琴 ，王春志 ，黄敬 ，刘耀驰 * (1. 中南大学化学化工学院,湖南 长沙 410083 ；2. 中国石化 巴陵分公司己内酰胺事业部,湖南 岳阳 414003) 摘要：采用铁碳微电解方法对己内酰胺生产废水进行了深度处理，探讨了pH 值、停留时间、铁碳质量比对处理效果的影响。在pH 为4 、 停留时间为120min、铁碳质量比为4 的最佳处理条件下，COD 去除率可以达到57.8%，色度去除率可以达到68.4% 。微电解对己内酰胺 废水的作用主要由于铁的絮凝作用，处理过程中的酸性条件、微电解的氧化还原和电场作用能改变废水中有机物的特性，从而提高了去 除效率。 关键词：铁碳微电解； 己内酰胺； 废水处理； 机理研究 Study on the Process and Mechanism of Advanced Treatment of Wastewater from Caprolactam Production by 1 1 1 2 2 Fe-C Micro-electrolysis.LIU Wei , LIU Yao-chi *, LIU Su-qin *, WANG Chun-zhi , HUANG Jing (1.College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China ；2.China Petroleum Chemical Corporation, Baling Branch, Caprolactam Division, Yueyang 414003, China) Abstract ：Fe-C micro-electrolysis was applied for advanced treatment of the wastewater from caprolactam production. The effects of pH, residence time, mass ratio of iron to carbon influences on treating result were discussed. In the best treatment condition (pH is 4, residence time is 120 min, and mass ratio of iron to carbon is 4 ), the dislodging rate of COD reached 57.8 percent, the dislodging rate of chroma reached 68.4 percent. The principle to remove COD and chroma by the system was mainly due to the flocculation of Fe ，also the acitic condition ，the redox reaction and the electic field action of micro-electrolysis could change the property of the organic matter in the wastewater ，causing the increasing of the dislodging efficiency. Key words ：Fe-C micro-electrolysis ；caprolactam ；wastewater treatment ；mechanism study 己内酰胺( C H NO) 是一种重要的化工原 的优势 [2],被广泛应用于印染、石化、制药、电 6 11 料, 在纺织、汽车、电子、机械等领域具有广泛 镀废水等工业废水的处理[3-7] 。本论文将铁碳微 应用, 近年来己内酰胺生产和需求量稳步增长 电解用于己内酰胺废水的深度处理，并取得了良 [1] 。中国石化巴陵分公司