催化氧化在芳烃厂工艺冷凝水再利用中的应用研究090612.doc

催化氧化在芳烃厂工艺冷凝水再利用中的应用研究焦 静1，鲁 艳2，马荣胜1，(1江苏省安全科学生产研究院，南京 210042 2南京金凌石化工程设计有限公司，南京 210042)［摘要］：分别在静态和动态条件下用筛选出的固体催化剂进行了芳烃厂工艺冷凝水回收利用的探索研究。静态试验表明，在适宜的操作条件下，废水的COD去除率可达到90%，出水COD20mg/L；动态试验结果表明，在催化剂床层高度50cm，pH值为6.5，温度25℃，流速8BV/h，空气流速300ml/min条件下，此时废水COD去除率达90%，出水水质完全达到锅炉用水水质要求；对催化剂连续8000h及多批次使用实验表明，实验采用的催化剂是一种高效、性能稳定的固体催化剂。 [关键词] 工艺冷凝水；COD去除率；催化氧化；废水处理 [中图分类号] X703.1 [文献标识码] A [文章编号] Application study on reuse of thecondensate water in arene plant with catalyzed oxidation Jiao jing1 , Lu yan2 , Ma Rongsheng1 (1Jiangsu Academy of Safety Science And Technology,Nanjing, 210042 Nanjing Jinling Petro Chemical Engineering Disign Co.Ltd,Nanjing, 210042) [Abstract] The solid catalyst was screened in batch experiments and dynamic experiments to treat the condensate water in arene plant.The COD removal of the condensate water was approximately 90% and the COD of treated condensate water was under 20mg/L in appropriate batch operation conditions;The results of dynamic expriments showed that the effluent COD in catalyzed oxidation process can be decreased to about 20 mg/L from 200 mg/L, the removal of the effluent COD was approximately 90% and the effluent quality can meet the demands of water used in boiler with the high of catalytic floor of 50cm, the pH of the insert wastewater of 6.5, the temperature of 25℃, the flow velocity of 8BV/h and airflow of 300ml/min;the result shows that solid catalyst was a high efficient ang steady catalyst through contunuous treatment of 8000h and multibatch processing. [key words] condensate water ; removal of COD; catalyzed oxidation; wastewater treatment 某公司制氢装置是以轻石脑油为原料，用蒸汽转化法制氢[1-3]，同时为了加速裂解过程产生的烃类和甲烷转化为一氧化碳，需加入大量水蒸气[4]，这些水蒸气经过冷凝和分离即生成工艺冷凝水[5]，排放量约为45 t/h，此废水外观清澈透明，主要含有甲醇、甲醛、甲酸等小分子有机物[6]及少量无机离子等，COD值约200mg/L。此股废水排放问题严重影响了企业的废水排放和环保达标。本研究采用催化氧化技术[7-10]对废水进行处理，其主要是利用高活性自由基（主要为·OH）进攻有机物分子并与之反应，从而破坏有机物分子结构达到氧化去除有机物的目的，实现高效的氧化处理，使出水水质达到锅炉用水标准，变“废”为“宝”，从而为社会和企业实现巨大的经济效益。 1 实验部分 1.1 仪器与试剂 仪器：pH-HJ90B型pH计（上海雷磁磁仪器公司）；BT01-100型蠕动泵(