江苏洪港石化PTA中水回用工程双膜法的方案设计及探讨

Design of Jiangsu Hong Kong Petrochemical PTA Water Reuse Project Double Membrane Method

江苏洪港石化PTA项目中水回用处理系统设计规模为1000 m3/h,采用超滤+反渗透双膜法进行处理,最终产水作为全厂循环冷却水的补充。因PTA废水碱度高,含重金属结构离子,特别是含有微量的催化剂钴元素,且COD含量较高,易造成反渗透膜的氧化及污堵,故方案设计中需充分考虑预处理工艺的选择,能保证重金属的去除及膜的进水COD控制在允许范围内。

Processing system design size of 1000 m3/h reuse of Hong Gang Jiangsu petrochemical PTA project, using ultrafiltration and reverse osmosis treatment double membrane method, supplement finished water as the circulating cooling water. Because PTA wastewater containing heavy metal ions of high alkalinity, structure, especially the catalyst containing cobalt trace elements, and the COD content is high, easy to cause oxidation and contamination of reverse osmosis membrane blocking, so the design should consider the pretreatment process, can ensure the influent COD controlled within the allowable range of heavy metals removal and membrane.