Reactor Clarifier™ Solids Contact Clarifiers Solids Contact and Flocculating Clarifiers for Water & Wastewater Treatment

Key features & benefits

• Largediameterturbineproducinghigh internal recycling rates

• Slowmovingturbineminimizingfloc shear

• Highefficiencyturbineforreducedenergyinputandoptimizedchemical usage

• Provendesignswithhundreds of installations

• Adaptabledesignstofitvarious customer needs

Howwecreatevalue

• Innovativedesignsthatcombinerapidmixing,flocculationandclarification in a single tank for efficiencyandlandsavings

• Flexibledesignstoaccommodate alltypesofinfluentlayouts

• Canoperateineitherasludgeblanket mode or a standard clarifier mode

• Adaptabletosoftening,turbidityremovalorphosphorusremovalapplications

• Efficientunitsthatreduceoperatingcosts

ImprovedPrecipitationandClarification

Reactor Clarifier™ Solids Contact Clarifiers

Backedbyextensiveexperience in water and wastewater treatment,Ovivocanhelpyoudeterminethemostcost-effectivemechanismforyourapplication,withoutcompromisingquality ordependability.

Working with you to address the specificprocesschallengesthataffectyourclarifierselection,weensure that your Reactor Clarifier™ solids contact unit functions as required.Ourtrainedsalesengineerscanassistyouwithequipmentsizingandselection,ensuringamarginofsafetyforprocessupsetsand allowing you the greatest operationalflexibility.Thiswillincludedetermining the settling rates and detentiontimesforclarification.

ThisbrochuredescribesthevarioustypesofunitsthatareavailableandexplainsthefeaturesthatmakeOvivo’sReactorClarifiersolidscontactunitsthebestvalueforyourplant.

Flocculation and Clarification Combined in a Single Tank Reactor Clarifier solids contact units are designed and built to providethemosteconomicalsolutiontoprecipitationandclarificationrequirements. Thesimpledesignprovidesforcoagulation,flocculation,solidsrecirculation,clarificationandpositivesludgeremovalinasinglebasin.Thiseliminatestheneedformultipletanksandadditionalpipework.Allunitsarebackedbyover60yearsofexperienceinengineeringandmanufacturing,ensuring the best fit for your uniqueplantrequirements.

Applications and OperationsAwiderangeofclarificationapplicationsrequiretheremovalofsuspendedsolidsfromthefeedstream.Theseincluderemovingturbidity,algae,color,ironandmetals; wastewater treatment; water softening and brine clarification.

Reactor Clarifier solids contact unitsallowseveraldifferentdesignconfigurations(varyingflocculationdistribution,recirculationratesandraketorques)meetingeventhemostexactingstandardsforquality.

Sincewerecognizethatthetruecost of a machine includes not onlythepurchasepriceoftheequipmentbutalsoitsoperatingcosts,ReactorClarifiersolidscontact units are built with the sameheavy-dutyfeaturesasmechanisms for mining and industry,toensurethatyourplantstaysonlineandoperational.

Solids Contact Designs

Principles of OperationReactor Clarifier solids contact units combineslowturbinespeedsandhighvolumeinternalrecirculationtopromotemixing,flocculationandsolids-contact.Therecirculationsystemisdesignedtopromoteparticlegrowthandimprovetheremovalofsuspendedsolids.

Asinfluententerstherecirculationdrumitispumpedupwardsbyalargediameterslow-speedturbine,where it comes into contact with alargevolumeofdenseflocfrompreviouslyprecipitatedsolids(6to15timesthemaximuminfluentrateis recirculated to increase solids contact with the new incoming

feed).Theresultingeffluentispassedunderthereactionconetotheclarificationzone,withtheheaviestparticlessettlingtothefloor.Thesearethenrakedtothecenterforrecirculationordischarge.

Type HRBFormechanismsupto100feetindiameter.Thismechanismissupportedbyabridge,whichspansthetank.

Type HRCFormechanismsfrom50to200feetindiameterorlarger,ourHRCReactorClarifiersolidscontactunitsaresupportedby a stationary center column mountedtothetankbottom.

Onalloursolidscontactmechanisms,theinfluentcanbeintroducedthroughside,top,orabottomfeedpipe.Oursolids contact units use the same drivesasheavy-dutyindustrialthickeners.Proveninservice,thesedrivesareequaltoany dutydemandedofthem.

Reactor Clarifier™TypeHRB(BridgeMounted) Reactor Clarifier™TypeHRC(ColumnMounted)

Flocculating Designs

Reactor Clarifier™ Solids Contact Clarifiers

Reactor Clarifier™TypeCF

Insomeapplications,cost-effectivetreatmentcanbeaccomplishedwithoutusingasolidscontactprocesstopromotesettling.Insuchcases,makingthe best use of chemicals to encourageoptimumflocculationandsettlingiskey.

We offer three basic designs of flocculating units for these applications.Eachisdesignedtoprovidesymmetricalmixingandflocculationwithlowtipspeeds forminimalflocshear.

Type BFROurBFRTypeReactorClarifier

solids contact units feature an oversizedbaffledfeedwellandconcentricturbine.Flocculantismixedwiththefeedstreamandallowedtopassunderthewellintotheclarificationzoneofthetank.Thisturbineflocculatorconfigurationisespeciallysuitedfor medium to high strength flocs,whichrequiremoreintensemixing.

BF and CF TypesOurBFandCFTypeunitsfeaturespeciallydesignedcounterrotatingpaddlesthatgentlyandthoroughlymixflocculantwithfeedstreams.SimilarinoperationtotheBFRTypeunits,BFandCFTypeshavetheaddedadvantageofmultiplepaddleswhichcreateeddiesorvortexingontheirtrailingedge.Thisenablescompleteenergydistributionwithoutlocalizedshear.Theseunitsareparticularlywellsuitedto bioflocculation and for light-to medium-strengthflocs.

ClarifierDriveMechanisms

TypeC60P/C72PHReactor Clarifier™Drive

TypeW/WReactorClarifier™Drive

Superior DesignsThe heart of the Reactor Clarifier solidscontactunitisthedrivehead, which rotates the rakes and turbines.

WitheveryoneofourReactorClarifier solids contact units you areassuredofreceivingadrivespecificallydesignedtomeetyourapplicationneeds.Themainbearingforhightorquerakedrivesandturbinedriveswasdevelopedbyourpioneeringengineersforuseonlargediameter,heavy-dutyindustrialthickeningapplicationsover50yearsago.Thedesignofthisbearingprotectsagainstoverturningloadsandassuresextended,trouble-freeoperation.

Dual Drive DesignsDrivesusedonReactorClarifiersolidscontactunitsaremadeupoftwoconcentricdrives:arakedriveandaturbinedrive.Thisallows for large diameter turbines to be mounted concentrically in the reaction well for symmetrical mixingandflocculation.Torquerequirementsvarybyinstallation,soweofferseveraltypesandstylestosuittheapplication.

Bridge-Mounted Drive DesignsCombinationW/Wseriesdrivesprovideupto100,000ft-lbstorque.Thesedrivesconsistofa single reduction worm gear trainthatusesahigh-strength,centrifugallycastbronzealloywork gear and a hardened steelalloyworm.Supportedbya4-pointcontactprecisionbearing,thisdriveisidealforlonglife and reliable duty on bridge-supporteddesigns.

Column-Mounted Drive DesignsForlarger,centercolumn-mountedmachines,combinationC/Cseriesdrivesprovideupto400,000ft-lbstorque.Thesedrivesutilizeheattreatedsteelalloyspurgearsandpinions,alongwith4-pointcontactprecisionmainbearings.

Drive ControlAnintegralelectro-mechanicaldrivecontrolunitisprovidedoneverydriveunit.Thecontrolmechanism is unaffected by temperatureorotherambientconditionsandgivesaclearindicationofoperatingloadsfromaweatherproofenclosurebuilttoNEMA4standards.Remotetorqueindicationisalsoavailable.

Drive Performance Depends Upon:• Propersupportforthemechanismandoperationalloads

• Selectingcorrectoutputtorque• Providingmaximumservicelife• Reliableoverloadprotection• Predictable,longgearand

bearing life

ImprovedPrecipitationandClarification

Reactor Clarifier™ Solids Contact UnitsHighratesolidscontact units are generally used for watertreatmentsoftening,turbidityandcolorremoval. Inwastewatertreatment,these units are used for heavymetalremovalandbiologicaltertiarytreatment.

Flocculating UnitsFlocculating units are appliedtomanyofthesameapplicationsasthesolids-contactdesigns,exceptthoseassociated with chemical precipitation.Additionally,CFTypeunitscanbeusedforprimaryandsecondarymunicipalwastewatertreatmentwhereimprovedflocculationisdesired.

APPliCATiOn

nORMAl TREATMEnT OBJECTiVE

APPLICATIONSUPENDED SOLIDS

TURBIDITY COLOURCA&MGHARNESS

SILICA HEAVYMETALS PROPHATE OILNONSOLIDBOD&COD

Water Softening X X X X X

Surface Water XO XO XO X X X

MunicpalWastewater

XO X X XO X XO

PrimaryPulp&PaperWastewater

XO XO XO

MetalFinishing XO XO

SteelMill XO XO

SuspendedSolids XO X XO

Brine Conditioning XO X X

X-SOLIDCONTACTREACTORCLARIFIER™

O-FLOCCULATINGREACTORCLARIFIER™

Reactor Clarifier™ Solids Contact Clarifiers

Solids Contact Designs

Top left:42ftdiameterHRBTypeReactor Clarifier™ Unit with steel launders,inFlorida,USA

Top right:FiberglassReinforcedPlastic(FRP)laundersprovideforflexibilityinyourprocessapplicationneeds

Above left:Availableinsizesover200feet in diameter

Above: HRCTypeReactorClarifier™ solidscontactunit,showinginstallationoftorquecageovercentercolumn

left:HRCTypeReactorClarifier™ solids contact unit installed in Thailand

Aswellasacompleterangeofprocessequipment,Ovivoisyoursourceforeverythingnecessarytomeetthetotalneedsofaproject,frominceptiontostart-upandbeyond.

Flowsheet CapabilitiesOvivocanhelpyouwiththedesignof yourtotalflowsheet,ensuringthatall your equipmentwillworktogetherforoptimalperformanceandeaseofoperation.

Tankage and ErectionOvivocantakethehassleoutofprojectmanagementandcoordinatingindependentcontractors,whomightnotbefamiliar with all the details necessary for the installation of your thickener orclarifier.Ourexperiencedtankageanderectioncrewscansaveyoutime and money by doing all the field worktodeliveryouatrouble-freemachine.

Upgrades and RetrofitsSedimentation technology is constantlyadvancing.Wecanshowyouhowtoincorporatestate-of-the-artdesignimprovementsintoyourexistingthickenerorclarifier.Manyupgradescanpayforthemselvesinamatterofmonthsandhelpincreasecapacityaswellasimproveperformance.

ServicingOurteamofskilledmechanicalandprocessengineerscankeepyourequipmentintopconditionandhelpyoutoavoidcostly,unscheduledinterruptions.

Services

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