江苏某能源石化聚酯一体化循环排污水回用项目工程实例  

Engineering Example of Advanced Treatment and Reuse of an Polyester Integrated Industry in Jiangsu

作　　者：项雯[1] 程新[1,2] 占慧 陈彪[1] 朱小萍 XIANG Wen;CHENG Xin;ZHAN Hui;CHEN Biao;ZHU Xiaoping(Hangzhou Water Treatment Technology Development Center Co.,Ltd.,Hangzhou 310012,China;BluestarMembrane Industries Co.,Ltd.,Hangzhou 311106,China)

机构地区：[1]杭州水处理技术研究开发中心有限公司,浙江杭州310012 [2]蓝星<杭州>膜工业有限公司,浙江杭州311106

出　　处：《净水技术》2024年第S02期170-176,200,共8页Water Purification Technology

基　　金：国家重点研发计划(2021YFB3801104);浙江省海水淡化技术研究重点实验室(2012E10001)。

摘　　要：江苏某能源石化聚酯一体化工业循环排污水中水回用系统设计规模为1800 m^(3)/h。该系统采用先进的工艺流程,包括“高效沉淀池+V型滤池+曝气生物滤池+超滤+反渗透”,以确保水质达到标准并实现高效的循环利用。通过高效沉淀池排泥水、V型滤池、曝气生物滤池(BAF)、V型滤池及超滤系统预处理,整体系统回收率高达70%。实际运行数据检验,该系统展现出令人满意的效果:化学耗氧量(COD_(Cr))去除率超过70%,氯离子去除率达到94%以上;产水COD_(Cr)质量浓度≤20 mg/L,Cl^(-)质量浓度≤50 mg/L,电导率≤20μS/cm;浓水COD_(Cr)质量浓度≤500 mg/L。该项目在高回收率及采用国产超滤膜情况下系统直接运行成本低至6.31元/t,每年减少约1058.4万t外排废水,实现了循环水排污水再利用的目的。The water recycling system for industrial circular wastewater in a certain energy,petrochemical,and polyester integrated facility in Jiangsu Province is designed with a capacity of 1800 m^(3)/h.The system employs an advanced process flow,including"high-efficiency sedimentation tank+V-type filter tank+aerated biofilter tank+ultrafiltration+reverse osmosis",to ensure water quality to meet standards and achieve efficient recycling.By utilizing the high-efficiency sedimentation tank to remove sludge water,as well as pre-treatment through the aerated biofilter tank(BAF filter tank),V-type filter tank,and ultrafiltration system,the overall system achieves a high recovery rate of 70%.Validation through actual operational data demonstrates satisfactory performance of the system.The chemical oxygen demand(COD_(Cr))removal rate exceeds 70%,while the chloride ion removal rate reaches over 94%.The produced water meets quality standards with mass concentration of CODc,is less than or equal to 20 mg/L,Cl^(-)mass concentration is less than or equal to 50 mg/L,and conductivity is less than or equal to 20μS/cm;and for the concentrated water,the mass concentration of COD_(Cr)is less than or equal to 500 mg/L.In this project,with a high recovery rate and the use of domestically produced ultrafiltration membranes,the direct operational cost of the system is reduced to as low as 6.31 yuan/t.This initiative results in the reduction of approximately 10.584 million tons of external discharged wastewater anually,effectively achieving the goal of reusing wastewater ina circular manner.

关 键 词：循环排污水 中水回用 超滤 反渗透 系统设计 

分 类 号：TU992[建筑科学—市政工程]