Agitator Power Requirement and Mixing Intensity Calculation

DataReactor Geometry4Diameter of the reactorT=50.0=4.167ft=1.270m124.1666666667126.6666666667125.83333333334Height of the cylindrical portionH=80.0=6.667ft=2.032m1mile1.89E-040.00078914121mile1.89E-040.0012626261mile1.89E-040.00110479784Liquid level height in the reactor from bottomZ=70.0=5.833ft=1.778m2yard0.33333341.38888916672yard0.33333342.22222266672yard0.33333341.9444448333Total Volume of the reactorV=2.8m3=98.01ft33ft14.16666666673ft16.66666666673ft15.83333333334in12504in12804in12705km3.05E-040.001275km3.05E-040.0020325km3.05E-040.0017781Select the type of AgitatorPitched Blade Turbine6m3.05E-011.276m3.05E-012.0326m3.05E-011.7784D/T Ratio0.57cm3.05E+011277cm3.05E+01203.27cm3.05E+01177.8Agitator rpmN=110rpm=1.833rps8mm3.05E+0212708mm3.05E+0220328mm3.05E+0217789micron3.05E+0512700009micron3.05E+0520320009micron3.05E+051778000Fluid PropertiesDensity=1100kg/m3Viscosity=100cp=0.1kg / msChemineer HE31.00E+000.25Wide Hydrofoil2.00E+000.3Pitched Blade Turbine3.00E+000.4CalculationRushton 6 Blade4.00E+000.5180 Degree Concave1) Reynolds Number0.5Diameter of the agitatorD=0.6m=2.08ftReynolds NumberRe=81322)Power RequirementPower NumberNp=1.37Select the value from Power number chart based on Reynolds numberPower RequiredP=1.61hpUse 5.5 for Rushton six blade turbine & 3.2 for concave 180 degree turbine(Assuming 80% Loading)3) Mixing IntensityPumping NumberNq=0.6Select the value from Pumping number chart based on Reynolds numberEquivalent DiameterTeq=5.00ftUse 0.72 for Rushton six blade turbine & 0.7 for concave 180 degree turbineVolumetric flow rateQ=9.9ft3/secCross sectional areaA=13.6ft2VelocityV=0.729ft/sec4) Agitator requiredNo of Agitators Required=2Z/T=1.400.25Chemineer HD30.3Wide Hydrofoil0.4Pitched Blade Turbine0.5Rushton 6 Blade Turbine180 Degree Concave

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Agitator TypesWide HydrofoilPitched Blade turbine180 degree concave

Flow Patterns

Impeller clearance & Spacing

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Mixing Intensity

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Np for - Chemineer HE3Power NumberNarrow HydrofoilPower NoReynolds NoD/T=0.25D/T=0.3D/T=0.4D/T=0.51000.730.710.690.682000.530.520.490.463000.470.450.420.45000.410.390.370.358000.380.370.340.3212000.360.340.320.330000.330.320.30.28100000.330.320.290.27

Np for - Chemineer HE3

D/T = 0.25D/T = 0.3D/T = 0.4D/T = 0.5Reynolds NumberPower NumberPower Number Curve for Chemineer HE3

Np for - Wide HydrofoilWide HydrofoilPower NoReynolds NoD/T=0.25D/T=0.3D/T=0.4D/T=0.51002.282.242.152.112001.781.751.691.653001.561.531.481.455001.31.291.241.238001.141.121.091.0812001.091.081.051.0330001.061.0510.98100001.061.0510.98

Np for - Wide Hydrofoil

D/T=0.25D/T=0.3D/T=0.4D/T=0.5Reynolds NumberPower NumberPower Number Curve for Wide Hydrofoil

Np for PBTPitched BladePower NoReynolds NoD/T=0.25D/T=0.3D/T=0.4D/T=0.51002.142.142.142.142001.751.751.751.723001.61.61.61.65001.461.461.461.468001.381.381.381.3812001.371.371.371.3730001.371.371.371.37100001.371.371.371.37

Np for PBT

D/T=0.25D/T=0.3D/T=0.4D/T=0.5Reynolds NumberPower NumberPower Number curve for Pitched blade turbine

Np RT & 180 Deg concaveRushton 6 BladeReynolds NoPower NoD/T=0.25D/T=0.3D/T=0.4D/T=0.51005.55.55.55.52005.55.55.55.43005.55.55.55.55005.55.55.55.58005.55.55.55.512005.55.55.55.530005.55.55.55.5100005.55.55.55.5180 Degree ConcaveReynolds NoPower NoD/T=0.25D/T=0.3D/T=0.4D/T=0.51003.63.63.63.62003.23.23.23.153003.23.23.23.25003.23.23.23.28003.23.23.23.212003.23.23.23.230003.23.23.23.2100003.23.23.23.2

Nq - Chemineer HE3Chemineer HE3Reynolds NoPower NoD/T=0.25D/T=0.3D/T=0.4D/T=0.51000.330.310.30.32000.340.330.320.323000.360.350.340.345000.380.360.360.358000.430.420.410.3912000.450.440.430.4130000.510.470.450.44100000.570.550.530.51

Nq - Chemineer HE3

D/T=0.25D/T=0.3D/T=0.4D/T=0.5Reynolds NumberPumping NumberPumping Number curve for HE3 Impeller

Nq - Wide HydrofoilWide HydrofoilReynolds NoPower NoD/T=0.25D/T=0.3D/T=0.4D/T=0.51000.440.410.360.352000.540.480.430.43000.580.510.450.435000.640.570.510.468000.670.60.540.4812000.710.620.570.530000.770.690.620.55100000.80.730.630.56Pitched BladeReynolds NoPower NoD/T=0.25D/T=0.3D/T=0.4D/T=0.51000.450.420.370.362000.550.50.450.413000.60.540.480.445000.660.610.540.478000.70.650.570.512000.740.670.60.5230000.820.750.660.57100000.880.80.680.6

Nq - Wide Hydrofoil

D/T=0.25D/T=0.3D/T=0.4D/T=0.5Reynolds NumberPumping NumberPumping Number curve for Wide Hydrofoil

Nq PBTPitched BladeReynolds NoPower NoD/T=0.25D/T=0.3D/T=0.4D/T=0.51000.450.420.370.362000.550.50.450.413000.60.540.480.445000.660.610.540.478000.70.650.570.512000.740.670.60.5230000.820.750.660.57100000.880.80.680.6

Nq PBT

D/T=0.25D/T=0.3D/T=0.4D/T=0.5Reynolds NumberPumping NumberPumping Number curve for PBT

Nq - Rushton & 180 deg concaveRushton 6 bladeReynolds NoPower NoD/T=0.25D/T=0.3D/T=0.4D/T=0.51000.70.70.70.72000.720.720.720.723000.720.720.720.725000.720.720.720.728000.720.720.720.7212000.720.720.720.7230000.720.720.720.72100000.720.720.720.72180 Degree ConcaveReynolds NoPower NoD/T=0.25D/T=0.3D/T=0.4D/T=0.51000.680.680.680.682000.70.70.70.73000.70.70.70.75000.70.70.70.78000.70.70.70.712000.70.70.70.730000.70.70.70.7100000.70.70.70.7