电化学脱稳技术处理油田含聚污水

2016年第36卷第3期化工环保ENVIRONMENTALPROTECTIONOFCHEMICALINDUSTRY·243·报道电化学脱稳技术处理油田含聚污水翟磊，靖波，王秀军，檀国荣，孟凡雪(1．海洋石油高效开发国家重点实验室，北京100028；2．中海油研究总院，北京100028)[摘要]采用“电化学除油器一斜板除油器一核桃壳过滤器”模拟装置处理模拟含聚采油污水，考察了有／无清水剂加入条件下含聚污水的处理效果，并对电化学除油机理进行了分析。实验结果表明：各级处理单元的除油率与电化学处理时间成正比，不加入清水剂、电化学处理40min时，各级处理单元的除油率均超过92％；在电化学除油器前加入清水剂100mg／L、电化学处理20rain时，各级处理单元的除油率分别为98．8％～99．4％，处理后污水含油量小于30mg／L，处理效果优于在斜板除油器前加入清水剂；电化学处理与清水剂处理有良好的协同除油效果，可大幅降低清水剂用量。机理分析结果表明，电化学作用主要使吸附于油一水界面的产出聚合物降解、脱稳，实现了对油一水界面膜强度和界面电荷的有效破坏，除油效果优异且处理后的絮体松散、无黏附性。[关键词]聚合物驱；油田含聚污水；电化学处理；絮凝；聚合物降解；脱稳[中图分类号]X741[文献标志码]A[文章编号]1006—1878(2016)03—0243—07[DOI]10．3969~．issn．1006—1878．2016．03．002Treatmentofpolymer—containingoilfieldwastewatebyelectrochemicaldestabilizationtechnologyZhaiLei一，JingBo一，WangXiujun，2TanGuorong一，MengFanxue’(1．StateKeyLaboratoryofOfshoreOilExploitation，Beijing100028，China；2．CNOOCResearchInstitute，Beijing100028，China)Abstract：Thesimulatedpolymer-containingoilfieldwastewaterwastreatedinasetofsimulationdevicescontainingelectrochemicalunit，inclinedplateoilskimmerandwalnutshellfilter．Thetreatmentefectswithorwithoutclarifyingagentadditionwereevaluated，andtheelectrochemicaloil—removingmechanismwasanalyzed．Theexperimentresultsshowthat：Theoilremovalratesofthetreatmentunitsareproportionaltotheelectrochemicaltreatmenttimeandtheyareallover92％whentheelectrochemicaltreatmenttimeis40minandnoclarifyingagentisadded；When100mg／LofclarifyingagentisaddedbeforetheelectrochemicalunitandtheelectrochemicaltreatmenttimeiS20min．theoi1removalratesofeachtreatmentunitsare98．8％一99．4％，theoilcontentofthetreatedwastewaterisbelow30mg／L；Theelectrochemicaltreatmentandclarifyingtreatmenthaveagoodsynergisticeffectonoil-removal，whichCangreatlydecreasetheclarifyingagentdosage．Themechanismanalysisresultsshowthat．withelectrochemicaltreatment．theresidualpolymersabsorbedtooil—waterinterfacearedegradedanddestabilized，andthestrengthofoil—waterinterfacialfilmandtheoil-waterinterfacechargesaredecreased．Theoi1-removalefectofelectrochemicaltreatmentisgoodandtheflocsareloo