渣浆泵(克莱博斯)课件

Welcome to millMAX Pump Training for Taggart ChinaWorld Headquarters-Tucson,Arizona10 Offices WorldwideSantiagoTucsonViennaJohannesburgSao PaoloPerthSydneyManilaBeijingShanghaiProblems With Conventional Slurry PumpsConventional Pump DesignLowPressureHighPressureSlurry Natural Recirculation PathConventional flow recirculation based on clearance versus pump speedRef:R.J.Stepanoff Centrifugal and Axial Flow PumpsSolids Concentration is Highestat Impeller ShroudsConcentration of Slurry is Cv=10%Concentration at Suction Shroud is Cv=24.6%Reference:University of Kentucky Hydraulics LaboratorySolids are Crushed Between Impellerand Pump Case,Consuming Power and Producing WearEffects of Suction-Side RecirculationSuction-Side RecirculationWide Gap at the Front and BackGrinding of Solids between the Impeller and Suction Liner or Throat BushUneven Parts Replacement Cycles Suction Side Liners and Impellers wear 2 to 3 times Faster than Pump Cases.Importance of Cyclone PerformanceSummary of Conventional Pump ProblemsSlurry recirculation on the suction sideGrinding of solids between the impeller and suction linerReduced hydraulic efficiency(Er)Reduced(cyclone)performance over timeHigh power consumptionLow parts wear lifeUnequal maintenance cyclesUnscheduled shutdownsBall chips or tramp jams the impeller front or back sideInability to increase capacity using existing motors and drivesmillMAX Design Concept Patented on-line suction side wear clearance adjustment Hybrid Sealing System maintains constant flow and pressure without increasing speed or causing motor overload.Tight clearance at wear ring prevents suction side recirculation.Wide clearance at expelling vanes prevents large solids from being crushed.Narrow clearance at backliner ensures shaft sealing system works well.millMAX Design 3x2 thru 14x12Incorporates a backlinerSolid volute caseWear Ring adjustment thru the casingWater flush,centrifugal seal and vacuum-pressure glandmillMAX Large Pump Design16x14 thru 28x26Incorporates a suction linerCasing with suction plate Wear ring adjustment thru the suction linerWater flush glandKrebs millMAX Pump Solving the Recirculation ProblemWide clearances at“A”prevents solids from being crushed.Tight clearances at“B”prevents suction-side recirculation.Narrow clearances at“C”ensures shaft sealing system works well.AWideBCTightNarrowUrethane carrier provides a seal against the intrusion of slurry.Long wearing high chrome iron wear ring seals against impeller.4-6 jacking screws are used to adjust the wear ring forward as the pump is running.Patented“Hybrid”Sealing SystemKrebs millMAX Pump Running Clearance AdjustmentWideNarrowStep No.1(At Start Up)Set Back Clearance by Adjusting Bearing Assembly to the RearStep No.2(During Operation)Set Front Clearance by Adjusting Wear Ring Toward ImpellerWhile the pump is running.Without disconnecting the drive.Without moving the impeller and shaft assembly.Without disturbing guards or v-belt drive.Setting ClearancesAdjustments Can be Done Throughout the Service Life of the Parts:Impeller High Radial VanesClears large solids.Prevents solids from being crushed.Reduces differential pressure at the eye of the impeller.Adjustable Wear RingWear ring takes up clearance at the impeller.Adjusted during operation.Reduces suction side recirculation.Maintains hydraulic performance.External Wear Adjustment Screws4-6 screws for on-line wear clearance adjustment.Adjusted while the pump is operating.Adjusted six to eight times during the life of the pump.Typical Wear Pattern on Worn ImpellermillMAX Power Frame Heavy Duty Cast Pedestal External Bearing Assembly Adjustment Wide Bearing Centers Heavy Duty Shaft and Bearings Double ClampsmillMAX Bearing Assembly DesignReverse Taper Roller BearingsIncreases Effective Load Span to Improve Life.Main Bearing Failure is Due to Over Greasing.Pumping Action of Taper Rollers Discharges Grease to the Outside Preventing Ingress of Slurry or Over Greasing of Bearing Cartridge.slurryMAX PumpHIGH PRESSURE/HIGH HEADPUMPS4 x 3-176 x 4-216x4x21 High Pressure Pump6x4x21 High Pressure PumpgraveIMAXgravelMAX PumpSlurry Pump ApplicationBelow BEP OperationMismatch betweenCritical Flow Anglesand Impeller VanesAt BEP Operation Incoming Angle ofSlurry is Matched toImpeller Vane AngleOversized pumps misalign flowW2U2C2C2-Absolute Flow VelocityU2-Peripheral Velocity of ImpellerW2-Relative Velocity of FlowBEP Operation W2U2C2Below BEP Operation Oversized Pumps Increase Internal Slurry VelocityOversized Pumps Increase Internal Slurry VelocityEffect of Suction Side Wear on Pumping SystemFixed Speed SystemNew ConditionWorn ConditionEffect of Suction Side Wear on Pumping SystemVariable Speed SystemNew ConditionWorn ConditionGlands-Shaft Seal OptionsWater Flush GlandGPMFrameFullLowCMC80.15MMA140.20MMB190.30MMC240.50MMD301.00Max Gland Water RequirementmillMAX Centrifugal Seal Low HeadLow Suction HeadAir/SlurryInterfaceDry Gland Centrifugal SealmillMAX Centrifugal Seal High HeadHigh Suction HeadAir/SlurryInterfaceDry Gland Centrifugal SealQuick Release Design Impeller Suction End RetainermillMAX Pumps Installed in CoalTaggart Designed/Constructed(or upgraded)Coal Prep PlantsNorth AmericaPrairie Eagle Coal(all pumps)12x10 thru 4x3Bluestone Ivel(all pumps)12x10 thru 4x3Armstrong Coal(all pumps)12x10 thru 4x3Bluestone Red Fox(all pumps)12x10 thru 4x3Preservati Coal(all pumps)12x10 thru 4x3Black Beauty Corning(all pumps)12x10 thru 4x3Night Star Coal(all pumps)12x10 thru 4x3 HHWestern CanadaWestern Canada Coal Wolverine(all pumps)14x12 thru 4x3Pine Valley Coal (all pumps)12x10 thru 4x3RussiaSUEK(11 pumps)14x12 thru 4x3Non Taggart millMAX InstallationsAlliance Resources Hopkins Co.Coal(all pumps)14x12 thru 4x3Advent Mining(all pumps)12x10 thru 4x3Peabody/Black Beauty(6 plants)several sizes in each plantElk Valley Coal Fording River 12 pumps 12x10 thru 6x4 Mezchuraskaya(60 pumps of various sizes)Krebs millMAX Pump10 x8 millMAX Pump at Bowie Resources,Colorado,USAComments:Customer:Kindill#3Horizon Natural ResourcesExisting Goulds 12x10 was too large and inefficient to use existing 200 hp motor.Due to high pyritic sulfur in the slurry,Goulds required rebuild every 9-12 mos.millMAX 10 x8 consumed 12%less power and lasted 1.5 years.Sr.Process Engineer was so impressed with millMAX performance,we were awarded 7 more pumps for their Colorado plant.Feichang xiexie