膜清洗技術(shù)課件

反滲透膜清洗技術(shù)TightSpacing粗糙表面RoughSurface污垢FOULING

低的產(chǎn)水量LowWater

Production膜損MembraneDamage低質(zhì)量滲透水PoorPermeateQuality經(jīng)常/頻繁的清洗FrequentCleaning常見污垢位置PrincipleFoulingLocation膠質(zhì)鐵和無水硅酸ColloidalIronandSilica離子氧化物和氫氧化物IronOxidesandHydroxides有機物OrganicMatterCalciumCarbonateSulfateand和無機鹽InorganicSalts生物污垢Biofouling預示污垢的因素FoulingIndicators膜保存MembranePreservation超過24小時，就需要保存 Preserveifoutofservice>24hrs選擇方案Options:亞硫酸氫鈉SodiumBisulfite1%Isothiazolone-PermaCleanPC-56Isothiazolone-PermaCleanPC-55甲醛Formaldehyde–carcinogen苯乙哌啶酮–膜損Gluteraldehyde-membranedamage膜沖洗

MembraneFlushing如果系統(tǒng)停車，滲透水沖洗 Permeateflushifsystemshutsdown作為一種“mini清潔” Actsasa“miniclean”減少污垢和水銹 Reducesfoulingandscaling

WhendoIclean?

WhenanyONEofthefollowingchanges:DifferentialPressure by15%NPF by15%SaltPassage by15%ExceedingtheselimitsmaybeirreparableStartplanningyourstrategyatthe1stindicationofaminimumchange!NormalizedPermeateFlowrateTime正確的清潔維護ProperCleaningMaintenanceCleaningafter10-15%declineNormalizedPermeateFlowrateTime不正確的清潔維護ImproperCleaningMaintenanceCleaningafter>15%decline在10-15%下降后清潔優(yōu)化RO性能Cleaningaftera10-15%declinemaximizesROperformance等及久清潔降低RO性能WaitingtoolongtocleanreducesROperformance影響清洗的因素

FactorseffectingCleaning裝置設(shè)計PlantDesign裝置運行PlantOperation膜Membrane化學藥品Chemicals壓降<60PSIPressuredrop<60PSI各壓力容器(8”)的水流35-40GPM

Flow35-40GPMperpressurevessel(8”)清洗溶劑量：每個8”元件使用8-10加侖，各壓力容器=50加侖

CleaningSolutionVolume:Use8-10GallonsPer8”element.Eachpressurevessel=50gallonsvolume如果觀察有污垢，先使用堿洗

UseAlkalinecleanersfirstiforganicfoulingissuspected清洗指點CleaningTips最高溶劑溫度

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

clean“stagebystage”更換混濁的/黑的溶劑

ReplaceTurbid/MurkySolutions保持良好的記錄Keepgoodrecords不要驚慌Don’tPanic清洗指點CleaningTipsFoundonPermaCareTrainingCD保持良好記錄KeepGoodRecords膜剖析MembraneAutopsy對使用過的膜做觀察分析測試-破壞過程

Destructiveprocedureconsistingofobservationsandanalyticaltestsonusedmembrane用以確認性能差或性能失效的原因

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