膜清洗技术课件

反渗透膜清洗技术TightSpacing粗糙表面RoughSurface污垢FOULING

低的产水量LowWater

Production膜损MembraneDamage低质量渗透水PoorPermeateQuality经常/频繁的清洗FrequentCleaning常见污垢位置PrincipleFoulingLocation胶质铁和无水硅酸ColloidalIronandSilica离子氧化物和氢氧化物IronOxidesandHydroxides有机物OrganicMatterCalciumCarbonateSulfateand和无机盐InorganicSalts生物污垢Biofouling预示污垢的因素FoulingIndicators膜保存MembranePreservation超过24小时，就需要保存 Preserveifoutofservice>24hrs选择方案Options:亚硫酸氢钠SodiumBisulfite1%Isothiazolone-PermaCleanPC-56Isothiazolone-PermaCleanPC-55甲醛Formaldehyde–carcinogen苯乙哌啶酮–膜损Gluteraldehyde-membranedamage膜冲洗

MembraneFlushing如果系统停车，渗透水冲洗 Permeateflushifsystemshutsdown作为一种“mini清洁” Actsasa“miniclean”减少污垢和水锈 Reducesfoulingandscaling

WhendoIclean?

WhenanyONEofthefollowingchanges:DifferentialPressure by15%NPF by15%SaltPassage by15%ExceedingtheselimitsmaybeirreparableStartplanningyourstrategyatthe1stindicationofaminimumchange!NormalizedPermeateFlowrateTime正确的清洁维护ProperCleaningMaintenanceCleaningafter10-15%declineNormalizedPermeateFlowrateTime不正确的清洁维护ImproperCleaningMaintenanceCleaningafter>15%decline在10-15%下降后清洁优化RO性能Cleaningaftera10-15%declinemaximizesROperformance等及久清洁降低RO性能WaitingtoolongtocleanreducesROperformance影响清洗的因素

FactorseffectingCleaning装置设计PlantDesign装置运行PlantOperation膜Membrane化学药品Chemicals压降<60PSIPressuredrop<60PSI各压力容器(8”)的水流35-40GPM

Flow35-40GPMperpressurevessel(8”)清洗溶剂量：每个8”元件使用8-10加仑，各压力容器=50加仑

CleaningSolutionVolume:Use8-10GallonsPer8”element.Eachpressurevessel=50gallonsvolume如果观察有污垢，先使用碱洗

UseAlkalinecleanersfirstiforganicfoulingissuspected清洗指点CleaningTips最高溶剂温度

MaxSolutionTemperatureperManufacturer浸透膜SoakMembranes“逐步”/“一段一段”清洗

clean“stagebystage”更换混浊的/黑的溶剂

ReplaceTurbid/MurkySolutions保持良好的记录Keepgoodrecords不要惊慌Don’tPanic清洗指点CleaningTipsFoundonPermaCareTrainingCD保持良好记录KeepGoodRecords膜剖析MembraneAutopsy对使用过的膜做观察分析测试-破坏过程

Destructiveprocedureconsistingofobservationsandanalyticaltestsonusedmembrane用以确认性能差或性能失效的原因

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