Dust Collectors Baghouses and Cartridge Collectors.

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Transcript of Dust Collectors Baghouses and Cartridge Collectors.

  • Dust CollectorsBaghouses and Cartridge Collectors

  • OverviewDust Collection

    Collectors

    Fabric Filters

    Trends

  • Grain LoadingIndustrial0.1 to 100 grains / ft3100 to 100,000 times5 grains / ft32,000 CFM for 365 days750,857 lbs150 lbs in < 2 hoursHVAC0.001 grains / ft32,000 CFM for 365 days150 lbs

    Industrial Ventilationwww.ACGIH.orgDesign, 28th Edition, $ 140

  • Media VelocityIndustrialFilter Rate / Air to Cloth5 FPM0.06 mph

    1 hour to walk a football fieldHVAC2,000 CFM through32 ft2 Pleat> 60 FPM100 ft2 Box20 FPM200 ft2 HEPA10 FPM

  • Purpose of Pollution ControlComply - Collect - Protect COMPLY with RegulationsEPA and OSHA

    COLLECT Product

    PROTECT ResourcesEquipment and Occupants

  • Three Cs of Pollution ControlCapture

    Convey

    Collect

  • Pollution Control SystemPickup PointsEmission SourceDuctworkDust CollectorRemoval SystemFanExhaust / Return

  • Pollution Control ComponentsPickup PointsEmission SourceDuctworkDust CollectorRemoval SystemFanExhaust / Return

  • Pollution Control ComponentsDust Collector TypesElectrostatic Precipitators (ESP)Wet CollectorsDry CentrifugalFabric Collectors

  • Pollution Control ComponentsDust Collector TypesElectrostatic Precipitators (ESP)Wet CollectorsDry CentrifugalFabric Collectors

  • Fabric CollectorsBaghouseShaker - Cleans Off LineReverse Air - Cleans Off LinePulse Jet - Cleans On Line

  • Fabric CollectorsBaghouseShaker - Cleans Off LineReverse Air - Cleans On LinePulse Jet - Cleans On Line

  • Fabric CollectorsBaghouseShaker - Cleans Off LineReverse Air - Cleans On LinePulse Jet - Cleans On LineCartridge CollectorUp flowCross flowDown flow / Parallel flow

  • Fabric CollectorsBaghouseShaker - Cleans Off LineReverse Air - Cleans On LinePulse Jet - Cleans On LineCartridge CollectorUp flowCross flowDown flow / Parallel flow

  • Pulse Jet ComponentsInlet Distribution (1)HopperHousing (2)Plenum (3)Tubesheet (4)Cleaning SystemHeaderBlow PipeVenturi

  • Cartridge Collector ComponentsInlet DistributionHousingHopperTubesheetPlenumCleaning System

  • Collector ConsiderationsProcess ConditionsTemperaturePressureMoistureChemistryGrain LoadDust PropertiesParticle SizeParticle ShapeExplosivity / FlamabilityAgglomerationAbrasiveSpace ConstraintsFootprintHeightCapital CostOperating CostsMediaCompressed AirEnergy / PAIR FLOW

  • FiberTensileAbrasion ResistAcidResistAlkali ResistBurnsTemp F (Cont)Temp F (Surge)CottonGoodGoodPoorGoodYes180200PolypropyleneExcellentExcellentExcellentExcellentYes170200NylonExcellentExcellentPoorExcellentYes200250WoolPoorFairGoodPoorNo200230HomopolymerAcrylicGoodGoodVery GoodFairYes260284CopolymerAcrylicAverageFairGoodFairYes230248PolyesterExcellentExcellentFairFairYes275300AramidVery GoodExcellentFairGoodNo375425PTFEAverageFairExcellentExcellentNo450500GlassExcellentFairGoodFairNo500550RytonVery GoodExcellentExcellentVery GoodNo375425P84Very GoodExcellentVery GoodFairNo500?550?

  • Collector ConsiderationsAir VelocitiesInlet

    Can / Interstitial

    Media / ACRBags4 to 8 fpmPleated2 to 6 fpm

  • Example Application1,880 CFM through 10 line to Model 25S(6)-104 Line0.09 ft2350 CFM6 Line0.20 ft2785 CFM5 Line0.14 ft2545 CFM3 Line0.05 ft2200 CFM1,880 CFM0.47 ft210 Line at 3,450 FPM9 Line at 4,260 FPM

  • Inlet Duct = 11 Round = 0.66 ft2Inlet Velocity = 1,880 CFM / 0.66 ft2 = 2,850 FPM Collector ConsiderationsAir VelocitiesInlet

    Can / Interstitial

    Media / ACR

  • Collector ConsiderationsAir VelocitiesInlet

    Can / Interstitial

    Media / ACR

  • Collector Considerations

  • Collector ConsiderationsAir VelocitiesInlet

    Can / Interstitial

    Media / ACR12.25 ft24242Can Velocity = 1,880 CFM / 12.25 ft2 = 155 FPM

  • Collector ConsiderationsAir VelocitiesInlet

    Can / Interstitial

    Media / ACR4242Bag Bottom Area = Qty * * Radius2 = 25 * 3.14 * (3)2 = 4.9 ft2

    Interstitial Area = 12.25 - 4.9 ft2 = 7.35 ft2Interstitial Velocity = 1,880 / 7.35 = 255 FPMInterstitial = 255 / 155 = 1.6 x Can Velocity

  • Collector ConsiderationsAir VelocitiesInlet

    Can / Interstitial

    Media / ACR

  • Collector ConsiderationsAir VelocitiesInlet

    Can / Interstitial

    Media / ACRBag Area = Qty * * Diameter * Length = 25 * 3.14 * 6 * 120 = 393 ft2Media Velocity = 1,880/ 393 = 4.8 FPM

  • Collector ConsiderationsAir VelocitiesInlet2,850 FPMCan155 FPMInterstitial255 FPMMedia / ACR4.8 FPMExhaust2,500 FPM

  • TrendsNew EquipmentHigh inletsePTFE membrane fabricPleated filtersMulti-module for off-line cleaning and on-line maintenance

    Baghouse ModificationsNFPA complianceESP / Shaker / Reverse Air conversions to Pulse JetPleat conversions

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