FCC催化剂生产尾气洗涤废水的膜过滤试验

发布时间：2018-01-27 06:03

本文关键词： FCC催化剂尾气洗涤废水中空纤维膜　出处：《中国给水排水》2016年21期 　论文类型：期刊论文

【摘要】：针对FCC催化剂生产尾气洗涤废水具有悬浮物浓度高、酸性强的特点,采用沉淀—中空纤维膜过滤工艺,构建了产水能力为200 L/h的现场试验装置,采用聚四氟乙烯(PTFE)中空纤维膜,通过微滤技术去除FCC催化剂生产尾气洗涤废水中悬浮物,研究其处理效果及产水量的变化。该系统现场连续运行了1 865 h,在废水水质正常的情况下,出水浊度能降到10 NTU以下,且产水能力稳定;但是,废水水质出现了两次明显异常,导致沉淀过程失效,膜箱进水浊度达到了10 000 NTU,产水能力下降,出水水质变差,且出现膜堵塞,难以通过曝气与反洗的方式彻底恢复,有待开展化学清洗工艺的研究。
[Abstract]:In view of the characteristics of high concentration of suspended matter and strong acidity in waste gas washing wastewater from FCC catalyst production, a water producing capacity of 200L / h field test device was constructed by means of precipitation-hollow fiber membrane filtration process. Polytetrafluoroethylene (PTFE) hollow fiber membrane was used to remove the suspended matter from tail gas washing wastewater produced by FCC catalyst by microfiltration technology. The system was continuously operated for 1 865 h. Under the condition of normal wastewater quality, the turbidity energy of effluent decreased to less than 10 NTU, and the capacity of water production was stable. However, the water quality of the wastewater was obviously abnormal twice, which resulted in the failure of the sedimentation process. The turbidity of the influent of the membrane tank reached 10 000 NTU, the capacity of water production decreased, the quality of the effluent water became worse, and membrane clogging occurred. It is difficult to recover completely by aeration and backwashing.
【作者单位】：武汉大学资源与环境科学学院;水资源安全保障湖北省协同创新中心;
【基金】：中国石化催化剂长岭分公司提供的研究资金
【分类号】：X78
【正文快照】： 石化企业每年都需要生产大量的催化裂化催化剂(FCC催化剂)以满足自身需求,其生产过程产生大量废水,其中尾气洗涤废水含有一定量的催化剂产品和盐酸等污染物,具有悬浮物浓度高、酸性强的特点[1]。目前,工业过程中将其直接排入综合废水系统[2~4],加碱调节p H值后进入絮凝沉淀处

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