基于膜蒸馏技术的脱硫废水零排放分盐工艺研究吴文景1,李宏岩2,杨连福2,梁柏龙2,贾建超2,张楠1(1.国家电投集团电站运营技术(北京)有限公司,北京102209;2.吉林电力股份有限公司长春热电分公司,长春130607)摘要:为实现废水深度处理,在已有膜蒸馏技术中试研究成果基础上,提出了“管式微滤→纳滤→膜蒸馏→机械蒸汽再压缩“分盐处理工艺,NaCl结晶盐纯度可达97%以上,产水电导率不高于100μS/cm。经测算,初投资成本为4555万元,每吨废水处理净成本为34.17元,年运行净成本为512.55万元,在分盐工艺中具有明显优势。最后指出可围绕预处理、热源选取、废水浓缩倍率确定和适用水质范围等方面,开展进一步试验验证和工艺优化研究。关键词:膜蒸馏;纳滤;脱硫废水零排放;分盐工艺中图分类号:X703文献标志码:B文章编号:1009-5306(2023)01-0039-04StudyonZeroDischargeSaltSeparationTreatmentTechnologyofDesulfurizationWastewaterBasedonMembraneDistillationTechnologyWUWenjing1,LIHongyan2,YANGLianfu2,LIANGBailong2,JIAJianchao2,ZHANGNan1(1.SPICPowerPlantOperationTechnologyBeijingcompanylimited,Beijing102209,China;2.JilinElectricPowerCompanyLimitedChangchunSoutheastThermalPowerBranch,Changchun130607,China)Abstract:Inordertorealizetheaduancedtreatmentofwastewater,a‘tubularmicrofiltration-nanofiltration-membranedistillation-mechanicalsteamrecompression’saltseperationtreatmenttechnologyisraisedbasedontheresultsofmembranedistillationpilotstudies,whichcanreachapurityofNaClcrystalloidsalttoabove97%,andaconductivityofwaterproductiontobelow100μS/cm.Itisestimatedthattheinitialinvestmentcostis45.55millionyuan,thenetcostpertonofwastewatertreatmentis34.17yuan,andthenetannualoperatingcostis5.1255millionyuan,whichhasobviousadvantagesinthesaltseparation.Furthertestvalidationandtechnologyoptimizationareexpected,whichcancenteronpretreatment,heatsourceselection,wastewatercon-centrationratiodeterminationandpracticablewaterqualityrange.Keywords:membranedistillation;nanofiltration;zerodischargeofdesulfurizationwastewater;saltseperation收稿日期:2022-10-16作者简介:吴文景(1991),男,工程师,从事火电节能环保技术研究与开发工作。0引言我国燃煤电厂经过大规模的烟气超低排放改造,基本...
