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PolymerFerricSulphate Name:PolymerFerricSulphate(PFS) Molecularformula:[Fe2(OH)n(SO4)3-n/2]m(n<2,m=f(n)) Appearance:Lightyellowamorphouspowder,hygroscopic,readilysolubleinwater.10%(W/W)aqueoussolutionisatransparentorangesolution. PFSsolid PFSsolution Specification:inconformitywithGB14591-93 Item PFSsolid PFSsolution Fe3+,%,≥ 19-21 9-14 Reducingsubstances(countedbyFe2+),%,≤ 0.15 0.1 Basicity,% 9.0-14.0 9.0-14.0 PH(1%aq.solution) 2.0-3.0 2.0-3.0 As,%,≤ 0.0008 0.0001 Pb,%,≤ 0.0015 0.0005 Non-soluble,%,≤ 0.5 0.4 Applications:Asflocculantinpurificationofmunicipalwater,industrialwater,wastewater,domesticsewageandsludgedewatering. Features: 1.High-efficiencyinorganicpolymerflocculant. 2.Goodcoagulatingproperty.Flocsformedarelargeandeasilysettable. 3.PFSisnontoxic.Itcancapturealuminum,chlorideandheavymetal,andwillnotcauseFecontamination. 4.Goodeffectindecolorizing,capturingoil,bacteria,algae,reducingCOD,BODandheavymetal. 5.Lowcorrosion.WorkingpHrange4-11,withbestperformanceatpH6-9.pHandbasicityofwateralmostdonotchangeaftertreatmentwithPFS. 6.Suitableforpurificationoflow-turbidity,low-algae,low-temperature,low-contaminatedrawwater.Particularlyeffectiveforhigh-turbidityrawwater. 7.Lowerdosagerequiredandsave20%-50%ofcost. Usage&Caution: UsersshalldeterminethesuitabilityofPFSfortherawwatertobetreatedbysampletestpriortouse. 1.PreparationofPFSworkingsolution:dissolvePFSinwaterattheconcentrationof10-30%(W/W),stiruntilitiscompletelyhydrolyzed.Dilutetheresultredbrownliquidtorequiredconcentration,usually2-5%fortapwaterand5-10%forindustrialwastewater. 2.Dosage:Dosagecanbedeterminedaccordingtotheformationandsettlingofflocsbysampletest.Fortreatmentoftapwaterunderidenticalcondition,thedosageofPFSisequivalenttopolyaluminumchloride,or1/3-1/4ofthatofaluminumSulphate. 3.PumpcalculatedamountoftheabovePFSworkingsolutionintogaugetank,andaddintotherawwatertobetreated. 4.GenerallythePFSworkingsolutionshallbeusedrightafterpreparation.Usepuretapwaterforpreparation.Sometimesslightprecipitationmayoccurdependingonthewaterused. 5.Keepcloseattentiontotheprogressoftheapplicationwhichmaybedividedintothreestages: (1Coagulation:LargeamountofmicroflocsformedinaveryshorttimeafterthePFSworkingsolutionismixedwithrawwater.Thewaterturnsmoreturbid.Vigorousstirringisneededatthisstage,usually250-300r/mininsampletestfor10-30S¡ê?atthemaximumnotexceeding2min. (2Flocculation:Themicroflocsgrowstoformlargeones.Mildstirringatfirstandthenstandingfor1015minisrequiredatthisstage.Inthesampletest,stirat150r/minfor6min,then60r/minfor4min. (3Sedimentation:waterflowshallbeveryslowatthisstageforflocsettling.Toachievehighefficiency,lamellasettlingorflotationmethodcanbeused.Inthesampletest,stirat20-30r/minfor5min,standfor10min,andtestturbidity. 6.Compulsivefiltration:choosesuitablefiltermaterialorfilteraidtoachievegoodcaptureeffectandfiltrationspeed.Thisisakeystepforimprovementofwaterquality.