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【英文标准名称】:StandardPracticeforCalculationandAdjustmentoftheStiffandDavisStabilityIndexforReverseOsmosis
【原文标准名称】:反渗透粘稠性和戴维斯稳定性指数的计算和调整的标准规程
【标准号】:ASTMD4582-2005
【标准状态】:现行
【国别】:
【发布日期】:2005
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D19.08
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:水;稳定性;数学计算;反渗透;调节;工艺
【英文主题词】:calciumcarbonate;membranescaling;reverseosmosis(RO);stabilityindexforRO;StiffandDavisStabilityIndex(SDSI)
【摘要】:Inthedesignandoperationofreverseosmosisinstallations,itisimportanttopredictthecalciumcarbonatescalingpropertiesoftheconcentratestream.Becauseoftheincreaseintotaldissolvedsolidsintheconcentratestreamandthedifferencesinsaltpassagesforcalciumion,bicarbonateion,andfreeCO2,thecalciumcarbonatescalingpropertiesoftheconcentratestreamwillgenerallybequitedifferentfromthoseofthefeedsolution.ThispracticepermitsthecalculationoftheSx0026;DSIfortheconcentratestreamfromthefeedwateranalysesandthereverseosmosisoperatingparameters.ApositiveSx0026;DSIindicatesthetendencytoformacalciumcarbonatescale,whichcanbedamagingtoreverseosmosisperformance.ThispracticegivesproceduresfortheadjustmentoftheSx0026;DSI.1.1ThispracticecoversthecalculationandadjustmentoftheStiffandDavisStabilityIndex(SDSI)fortheconcentratestreamofareverseosmosisdevice.Thisindexisusedtodeterminetheneedforcalciumcarbonatescalecontrolintheoperationanddesignofreverseosmosisinstallations.Thispracticeisapplicableforconcentratestreamscontainingmorethan10000mg/Loftotaldissolvedsolids.Forconcentratestreamscontaininglessthan10000mg/Loftotaldissolvedsolids,refertoPracticeD3739.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G04
【国际标准分类号】:71_120_99
【页数】:4P.;A4
【正文语种】: