含硫污水曝气除硫工艺效果分析及防腐对策
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2020-04-17 12:22:23
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2016年3月第31卷第2期西安石油大学学报(自然科学版)JournalofXianShiyouUniversity(NaturalScienceEdition)Mar.2016Vo1.31No.2DOI:10.3969/j.issn.1673-064X.2016.02.016文章编号:1673-064X(2016)02-0099-06中图分类号:TE49文献标识码:A含硫污水曝气除硫工艺效果分析及防腐对策李景全,安云飞,郑亚妮,颜珩烨,代吉建(1.河南油田分公司第一采油厂,河南桐柏474780;2.西安石油大学化学化工学院,陕西西安710065)摘要:河南油田双河联合站采用曝气除硫工艺,但该工艺后续设备腐蚀现象严重。为了进行工艺优化,研究了脱硫塔曝气的气液比以及曝气前后SRB和硫形态的变化,利用动态失重法比较了脱硫塔前后污水的腐蚀性,并通过XRD/SEM/EDS对腐蚀产物加以分析。结果表明:曝气除硫的气液比调整为0.5效果最佳。在气液比为0.6时,曝气50min对SRB有一定的抑制效果。脱硫塔曝气后其出口的腐蚀速率较进口减小一半,但出1252由残余氧引起的腐蚀性仍较强,将脱硫塔出口至注水罐之间的钢管线更换为玻璃钢管线,收到了良好的防腐效果。曝气除硫后含有s的悬浊液进入注水罐,S和CO2协同效应引起的腐蚀速率高达1.33mm/a,建议在注水罐进口安装过滤装置或对注水罐进行防腐涂层处理。关键词:含硫污水;曝气除硫;防腐措施EffectAnalysisofAerationDesulfurizationProcessofSulfur.containingWastewaterandPreventionMeasurestoItsCorrosionLIJingquan,ANYun~i,ZHENGYani,YANHengye,DAIJijian((1.TheFirstOilProductionPlant,HenanOilfieldCompany,Tongbai474780,Henan,China;2.CollegeofChemistryandChemicalEngineering,XianShiyouUniversity,Xihn710065,Shaanxi,China)Abstract:Tooptimizetheaerationdesulfurizationtechnologyofsulfur—containingwastewaterinShuangheunionstationofHenanOil—field,theinfluenceofgas-liquidratioontheaerationdesulfurizationeffectandtheinfluenceoftheaerationprocessontheSRBandthesulfurspeciationinthewastewaterarestudied,thecorrosivityofthewastewaterbeforeandafterdesulfurizationtowerisevaluatedusingweightlossmethod,andthecorrosionproductsareanalyzedbymeansofXRD,SEMandEDS.Theresultsshowthat:theoptimaldesul—furizationeffectcanbeobtainedwhenthegas—liquidratiois0.5;whenthegas—liquidratiois0.6,theaerationof50minhascertainin—hibitoryeffectonSRB;afteraeration,thecorrosionrateofthewastewaterattheoutletofthedesulfurizationtowerishalfofthatattheinletofit,butthecorosioncausedbytheresidualoxygenattheoutletisstillstrong.Thesteelpipelinebetweentheoutletofthedesul—furizationtowerandthewaterinjectiontankisreplacedbyglassfiberreinforcedplasticpipeline,andthegoodcorrosionpreventioneffectisreceived.Afteraeration,thesuspensioncontainingS8enteresthewaterinjectiontank,thesynergi【sticeffectofS8withCO2cau·se
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