stranco products polyblend dp series polymer feed system

1 stranco productspolyblend dp seriespolymer feed system THE PROCESSUNMATCHED PERFORMANCEAND RELIABILITYREDUCED polymer CONSUMPTIONAND IMPROVED SAFETYThe polyblend dp series is withoutquestion the finest dry polymer feedsystem available. It outperforms allother designs in head to head dp series typically reduces poly-mer consumption 25% or more whilesubstantially improving polymer per-formance in terms of sludge dryness,solids capture, water clarity,drainage/retention, or any other mea-sure. Moreover, the polyblend DPSeries has an unmatched reputation forreliability. While dry polymer feed sys-tems are notoriously high maintenanceitems, the polyblend DP Seriesrequires the least maintenance andoperates unattended for longer inter-vals than any other dry polymer dry polymer in water for usein a clarifier or dewatering device is oneof the most difficult tasks in chemicalfeed technology.

2 Dry polymer particlesare typically 100 times larger than theparticles of polymer suspended in liq-uid polymers. Consequently, dry poly-mer has a greater tendency to agglom-erate and requires far more mixing timethan liquid polymer . During theextended mixing time, the polymer issubject to damage from the rotatingmixer. In most systems, 1/4 of thepolymer is wasted in the form of fisheyes or broken into useless frag-ments. In addition, most dry polymerfeed systems are housekeeping night-mares. They are not only unsightly, butcan be very dangerous as spilled drypolymer can become a safety hazard.

3 The polyblend dp series overcomes allthese difficulties with several patentedinnovations. The high energy disperser,low energy mix tank, and dry disperserskid are described in detail in the following pages. polymer and water come together inthe disperser; the solution then movesto the mix tank. From the mix tank, thepolymer is sent to a holding tank andfrom there, through the final feed skidto the point of application. The operation is fully automatic all theoperator has to do is keep polymer inthe hopper. The control system for the DP Seriesis unmatched in simplicity. A singleLCD display enables complete opera-tion of all functions.

4 Trouble-shootingis also streamlined, with all alarm con-ditions described on the display. Infield trials and start ups, operators areinterfacing with the system worry freewithin a half day of TECHNOLOGY 1. ISOLATION VALVEP revents moisture contamination of dry CONTROL BAFFLE Creates optimum height for liquid funnel .3. DRY/LIQUID INTERFACEC reates optimum environment for introducing dry powder and creat-ing a homogeneous DILUTION WATER INLET5. MIXING IMPELLER Creates a vacuum and provides theinitial high energy mix necessary to prevent STEEL CORROSION RESISTANT CONSTRUCTION7. ACRYLIC COVER8. DRY POWDER FEEDER Accurately meters dry powder for consistent solution LIQUID FUNNEL WATER INLET Creates a self-cleaning water funnel which prevents build-up onstationary DISCHARGE TO MIX ENERGY MIXINGA fter passing the impeller, the solution moves up and around the vortex guide before GUIDE TUBED raws the contents of dry/liquid interface into high shear mixing create the ideal environment for the first stage of polymer dissolution, crucial initialwetting occurs in the disperser.

5 Here, polymer and water are subjected to high energy created by mechanical mixing. After brief exposure, the solution exits the high energy CHAMBER328910121174561 HIGH ENERGYMECHANICAL MIXING1. RIGHT ANGLE GEAR REDUCERP rovides optimum RPM for tank SOLUTION INLET PIPINGD irects solution into the eye of the hollow wing PATENTED STAINLESS STEEL HOLLOW WING MIXING IMPELLERR educes polymer consumption by providing proper energy at low speed through impeller size and recirculation to prevent agglomera-tions, while minimizing polymer MIX TANKC orrosion resistant stainless steel orfiberglass square tank design: Improves mixing performance at low speed, allowing activation to continue without damaging the feed TANKA llows continuous solution MIXER MOTORWash-down duty provides reliable operation in harsh SOLUTION MOVEMENTS olution is dispersed through the ends of the impeller, and returns after rolling up the sides of the tank and back RECIRCULATION PORT Over-sized impeller opening creates recirculation by pulling solution from inlet piping and the disperser, the polymer solution flows into the mix tank.

6 Most polymer mix tanksare not uniform in their mixing energy. Agglomerations form in the portions of the tankthat receive the least mixing energy while polymer chains are broken up at the tip of therotating mixing blade. In contrast, the dp series tank is specifically designed to be fullyuniform in mixing intensity. The rotating impeller is a hollow wing , the length of whichis over half the width of the tank. The hydraulics of the system make the impeller act likea pump, continuously moving the solution vertically as well as horizontally. Moreover, thesquare tank design further contributes to uniformity of the mixing energy. The result is noagglomerations and no broken polymer chains.

7 In other words, no waste. polymer costs arereduced and performance ENERGY MIX TANK12347856 polymer COSTS REDUCEDAND PERFORMANCE IMPROVED2 DRY DISPERSER SKID12456781. EXTENSION HOPPERSee next page for handling DRY POWDER FEEDERP rovides accurate and repeatable feed rates within 1%.3. PNEUMATIC BALL VALVEP rovides positive shut-off of the inlet water, even if the system loses power and/or air DRY DISPERSERE venly dispenses polymer into solution to reduce waste and improve INTEGRAL AIR COMPRESSORP rovides reliable air supply when clean air is DIRECT DRIVE MIXINGP rovides quiet and troublefree MONITORING GAUGE ASSEMBLYP rovides immediate information on all critical system LIQUID polymer PUMP(OPTIONAL)

8 Provides system with most flexibility to meet future OPERATION3 OPTIONS AT A GLANCEDry PolymerStandard models make down from 6-94 lbs/hr depending on solution concentration and mixing time PolymerDiaphragm Metering Pump22 gph35 gphProgressive Cavity Metering Pump10 gph50 gphMannich PolymerStainless Steel GearMetering Pump60 gph200 gph660 gphBatch Tanks160 Gallon Single or Tandem360 Gallon Single or Tandem750 Gallon Single or Tandem1500 Gallon Single orTandemWater Supply20 gpm30 gpm100 gpmAir SupplyPlant SystemIntegral CompressorVoltage208/1/60 VAC/phase/Hz240/1/60 VAC/phase/Hz480/3/60 VAC/phase/Hz575/3/60 VAC/phase/HzDry polymer ft3 Hopper20 ft3 HopperBulk Bag FrameBulk Bag Frame with HoistBag Dump HopperOther CombinationsOptionsLow Powder Level IndicationOver-sized Feeder Screw Supply Water Pressure Reducing ValveAccessoriesFinal feed PumpsFinal feed Post-DilutionLarge Hold TanksTransfer Pumps Engineered Systems to Meet Your Design CriteriaCHOICES TO MEET YOUR CRITERIAF inal feed skids are designed aroundyour needs.

9 Choose the pumps (number, type and size), the controls(manual, flow pacing, loss of flow, etc.),the materials of construction and typeof post-dilution. The USFilter s stranco products dry polymer feed system is a jewel from the operators perspective. The operators learned rapidly and feel very comfortable with theprinciples of its operation. polymer batches are replicated very closely, and the operatorshave not experienced variations in centrifuge performance due to unadjusted changes inpolymer concentration. Wastewater TreatmentFacility OperatorDRY DISPERSER SKIDLOW ENERGY MIX TANK WITHFEED TANKFINAL feed SKIDTank sizes vary based on be equipped for liquid dp series SYSTEMTHE FINEST DRY POLYMERFEED SYSTEMS tranco Box 389 Bradley, Il 60915 Works, TonbridgeKent, TN11 0 QLUnited faxLit No.

10 1305-9909 1999 United States Filter Corporation Taking care of the world s water.