DOI:10.19965/j.cnki.iwt.2022-0391第43卷第3期2023年3月Vol.43No.3Mar.,2023工业水处理IndustrialWaterTreatment186焦化废水回用处理工艺设计及运行分析门枢,王凯,杨飞(中冶焦耐工程技术有限公司,辽宁大连116085)[摘要]针对某焦化厂焦化废水经生化+Fenton氧化处理后的出水可生化性差、COD及电导率高的特点,设计了“多介质过滤+活性炭吸附+超滤(UF)+反渗透(RO)+电渗析(ED)”组合回用处理工艺对废水进行处理。运行结果表明,活性炭吸附塔可有效去除Fenton氧化后废水中的COD,COD去除率达到30%~50%;经过多介质过滤器、活性炭吸附塔、超滤后,反渗透产水率可达到82%,脱盐率大于98%;电渗析装置可有效去除RO浓水含盐量,脱盐率约65%,产水率约55%。经组合回用处理工艺处理后的焦化废水回收率可稳定达到92%以上,产水水质优于《工业循环冷却水处理设计规范》(GB50050—2017)中再生水水质指标要求,可作为厂区循环冷却水补充水使用。成本分析表明,该工艺吨水运行成本约4.63元,具有较好的经济性。[关键词]焦化废水;回用处理;活性炭吸附;电渗析[中图分类号]X703[文献标识码]B[文章编号]1005-829X(2023)03-0186-06ProcessdesignandoperationanalysisofthereusetreatmentofcokingwastewaterMENShu,WANGKai,YANGFei(ACRECoking&RefractoryEngineeringConsultingCorporation,MCC,Dalian116085,China)Abstract:TheeffluentofthecokingwastewateraftertreatedbybiochemicalandFentonoxidationhadthecharacter⁃isticsofpoorbiodegradability,highCODandconductivity.Thecombinedprocess“multi-mediumfiltration+GACadsorption+ultrafiltration(UF)+reverseosmosis(RO)+electrodialysis(ED)”hadbeenappliedforthereusetreat⁃mentofcokingwastewater.Theoperationresultsshowedthat,CODinwastewateraftertreatedbyFentonoxidationcouldbeeffectivelyremovedbyGACadsorption,andtheCODremovalratewas30%-50%.Aftertreatedbymulti-mediumfiltration,GACadsorptionandUF,waterproductionratecouldreachto82%,andthedesaltingratewasmorethan98%.SaltinconcentratedwaterofROcouldbeeffectivelyremovedbyED,withdesaltingratewasabout65%andwaterproductionratewasabout55%.Therecoveryrateofcokingwastewatertreatedbythecom⁃binedreusetreatmentprocesscouldreachmorethan92%.Thequalityoftheproducedwate...