137934388 Agitator Power Requirement and Mixing Intensity Calculation
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Reactor Geometry 6 Diameter of the reactor T = 50.0 6 Height of the cylindrical portion H = 80.0 6 Liquid level height in the reactor from bottom Z = 70.0 Total Volume of the reactor V = 169500.0 m3 1 Select the type of Agitator Pitched Blade Turbine 4 D/T Ratio 0.5 Agitator rpm N = 110 rpm Fluid Properties Density ρ = 1100 kg/m3 Viscosity μ = 100 cp Calculation 1) Reynolds Number Diameter of the agitator D = 25.0 m Reynolds Number Re = 12604167 2)Power Requirement Power Number Np = 1.37 Power Required P = 152011481.22 hp (Assuming 80% Loading) 3) Mixing Intensity Pumping Number Nq = 0.6 Equivalent Diameter Teq = 196.78 ft Volumetric flow rate Q = 606504.8 ft3/sec Cross sectional area A = 21124.2 ft2 Velocity V = 28.711 ft/sec 4) Agitator required Select the value from Reynolds number Use 5.5 for Rushton s concave 180 degree Select the value from on Reynolds number Use 0.72 for Rushton for concave 180 degr Click here
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Transcript of 137934388 Agitator Power Requirement and Mixing Intensity Calculation
Reactor Geometry
6 Diameter of the reactor T = 50.0
6 Height of the cylindrical portion H = 80.0
6 Liquid level height in the reactor from bottom Z = 70.0
Total Volume of the reactor V = 169500.0 m3
1 Select the type of Agitator Pitched Blade Turbine
4 D/T Ratio 0.5
Agitator rpm N = 110 rpm
Fluid Properties
Density ρ = 1100 kg/m3
Viscosity µ = 100 cp
Calculation
1) Reynolds Number
Diameter of the agitator D = 25.0 m
Reynolds Number Re = 12604167
2)Power Requirement
Power Number Np = 1.37
Power Required P = 152011481.22 hp
(Assuming 80% Loading)
3) Mixing Intensity
Pumping Number Nq = 0.6
Equivalent Diameter Teq = 196.78 ft
Volumetric flow rate Q = 606504.8 ft3/sec
Cross sectional area A = 21124.2 ft2
Velocity V = 28.711 ft/sec
4) Agitator required
Select the value from Power number chart based on
Reynolds number
Use 5.5 for Rushton six blade turbine & 3.2 for
concave 180 degree turbine
Select the value from Pumping number chart based
on Reynolds number
Use 0.72 for Rushton six blade turbine & 0.7
for concave 180 degree turbine
Click here
No of Agitators Required = 2
Z/T = 1.40
0.25 Chemineer HD3
0.3 Wide Hydrofoil
0.4 Pitched Blade Turbine
0.5 Rushton 6 Blade Turbine
180 Degree Concave
Click Here
Select the value from Power number chart based on
Reynolds number
Use 5.5 for Rushton six blade turbine & 3.2 for
concave 180 degree turbine
Select the value from Pumping number chart based
on Reynolds number
Use 0.72 for Rushton six blade turbine & 0.7
for concave 180 degree turbine
Chemineer HD3
Wide Hydrofoil
Pitched Blade Turbine
Rushton 6 Blade Turbine
180 Degree Concave
Wide Hydrofoil
Pitched Blade turbine 180 degree concave
180 degree concave
Back to data sheet
Back to data sheet
Power Number
Narrow Hydrofoil
Power No
Reynolds
NoD/T=0.25 D/T=0.3 D/T=0.4 D/T=0.5
100 0.73 0.71 0.69 0.68
200 0.53 0.52 0.49 0.46
300 0.47 0.45 0.42 0.4
500 0.41 0.39 0.37 0.35
800 0.38 0.37 0.34 0.32
1200 0.36 0.34 0.32 0.3
3000 0.33 0.32 0.3 0.28
10000 0.33 0.32 0.29 0.27
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
100 1100 2100 3100 4100 5100 6100 7100 8100
Po
we
r N
um
be
r
Reynolds Number
Power Number Curve for Chemineer HE3
D/T = 0.25 D/T = 0.3 D/T = 0.4
8100 9100 10100 11100
Power Number Curve for Chemineer HE3
D/T = 0.5
Wide Hydrofoil
Power No
Reynolds
NoD/T=0.25 D/T=0.3 D/T=0.4 D/T=0.5
100 2.28 2.24 2.15 2.11
200 1.78 1.75 1.69 1.65
300 1.56 1.53 1.48 1.45
500 1.3 1.29 1.24 1.23
800 1.14 1.12 1.09 1.08
1200 1.09 1.08 1.05 1.03
3000 1.06 1.05 1 0.98
10000 1.06 1.05 1 0.98
0
0.5
1
1.5
2
2.5
100 1100 2100 3100 4100 5100 6100
Po
we
r N
um
be
r
Reynolds Number
Power Number Curve for Wide Hydrofoil
D/T=0.25 D/T=0.3 D/T=0.4
7100 8100 9100 10100 11100
Power Number Curve for Wide Hydrofoil
D/T=0.4 D/T=0.5
Pitched Blade
Power No
Reynolds No D/T=0.25 D/T=0.3 D/T=0.4 D/T=0.5
100 2.14 2.14 2.14 2.14
200 1.75 1.75 1.75 1.72
300 1.6 1.6 1.6 1.6
500 1.46 1.46 1.46 1.46
800 1.38 1.38 1.38 1.38
1200 1.37 1.37 1.37 1.37
3000 1.37 1.37 1.37 1.37
10000 1.37 1.37 1.37 1.37
0
0.5
1
1.5
2
2.5
100 1100 2100 3100 4100 5100 6100
Po
we
r N
um
be
r
Reynolds Number
Power Number curve for Pitched blade turbine
6100 7100 8100 9100 10100 11100
Reynolds Number
Power Number curve for Pitched blade turbine
D/T=0.25
D/T=0.3
D/T=0.4
D/T=0.5
Rushton 6 Blade
D/T=0.25 D/T=0.3 D/T=0.4 D/T=0.5
100 5.5 5.5 5.5 5.5
200 5.5 5.5 5.5 5.4
300 5.5 5.5 5.5 5.5
500 5.5 5.5 5.5 5.5
800 5.5 5.5 5.5 5.5
1200 5.5 5.5 5.5 5.5
3000 5.5 5.5 5.5 5.5
10000 5.5 5.5 5.5 5.5
180 Degree Concave
D/T=0.25 D/T=0.3 D/T=0.4 D/T=0.5
100 3.6 3.6 3.6 3.6
200 3.2 3.2 3.2 3.15
300 3.2 3.2 3.2 3.2
500 3.2 3.2 3.2 3.2
800 3.2 3.2 3.2 3.2
1200 3.2 3.2 3.2 3.2
3000 3.2 3.2 3.2 3.2
10000 3.2 3.2 3.2 3.2
Power NoReynolds No
Power NoReynolds No
Chemineer HE3
D/T=0.25 D/T=0.3 D/T=0.4 D/T=0.5
100 0.33 0.31 0.3 0.3
200 0.34 0.33 0.32 0.32
300 0.36 0.35 0.34 0.34
500 0.38 0.36 0.36 0.35
800 0.43 0.42 0.41 0.39
1200 0.45 0.44 0.43 0.41
3000 0.51 0.47 0.45 0.44
10000 0.57 0.55 0.53 0.51
Reynolds NoPower No
0
0.1
0.2
0.3
0.4
0.5
0.6
100 1100 2100 3100 4100 5100 6100
Pu
mp
ing
Nu
mb
er
Reynolds Number
Pumping Number curve for HE3 Impeller
6100 7100 8100 9100 10100 11100
Reynolds Number
Pumping Number curve for HE3 Impeller
D/T=0.25
D/T=0.3
D/T=0.4
D/T=0.5
Wide Hydrofoil
D/T=0.25 D/T=0.3 D/T=0.4 D/T=0.5
100 0.44 0.41 0.36 0.35
200 0.54 0.48 0.43 0.4
300 0.58 0.51 0.45 0.43
500 0.64 0.57 0.51 0.46
800 0.67 0.6 0.54 0.48
1200 0.71 0.62 0.57 0.5
3000 0.77 0.69 0.62 0.55
10000 0.8 0.73 0.63 0.56
Pitched Blade
D/T=0.25 D/T=0.3 D/T=0.4 D/T=0.5
100 0.45 0.42 0.37 0.36
200 0.55 0.5 0.45 0.41
300 0.6 0.54 0.48 0.44
500 0.66 0.61 0.54 0.47
800 0.7 0.65 0.57 0.5
1200 0.74 0.67 0.6 0.52
3000 0.82 0.75 0.66 0.57
10000 0.88 0.8 0.68 0.6
Reynolds NoPower No
Reynolds NoPower No
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
100 1100 2100 3100 4100 5100 6100
Pu
mp
ing
Nu
mb
er
Reynolds Number
Pumping Number curve for Wide Hydrofoil
6100 7100 8100 9100 10100 11100
Pumping Number curve for Wide Hydrofoil
D/T=0.25
D/T=0.3
D/T=0.4
D/T=0.5
Pitched Blade
D/T=0.25 D/T=0.3 D/T=0.4 D/T=0.5
100 0.45 0.42 0.37 0.36
200 0.55 0.5 0.45 0.41
300 0.6 0.54 0.48 0.44
500 0.66 0.61 0.54 0.47
800 0.7 0.65 0.57 0.5
1200 0.74 0.67 0.6 0.52
3000 0.82 0.75 0.66 0.57
10000 0.88 0.8 0.68 0.6
Reynolds NoPower No
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
100 1100 2100 3100 4100 5100 6100
Pu
mp
ing
Nu
mb
er
Reynolds Number
Pumping Number curve for PBT
6100 7100 8100 9100 10100 11100
Reynolds Number
Pumping Number curve for PBT
D/T=0.25
D/T=0.3
D/T=0.4
D/T=0.5
Rushton 6 blade
D/T=0.25 D/T=0.3 D/T=0.4 D/T=0.5
100 0.7 0.7 0.7 0.7
200 0.72 0.72 0.72 0.72
300 0.72 0.72 0.72 0.72
500 0.72 0.72 0.72 0.72
800 0.72 0.72 0.72 0.72
1200 0.72 0.72 0.72 0.72
3000 0.72 0.72 0.72 0.72
10000 0.72 0.72 0.72 0.72
180 Degree Concave
Reynolds No Power No
D/T=0.25 D/T=0.3 D/T=0.4 D/T=0.5
100 0.68 0.68 0.68 0.68
200 0.7 0.7 0.7 0.7
300 0.7 0.7 0.7 0.7
500 0.7 0.7 0.7 0.7
800 0.7 0.7 0.7 0.7
1200 0.7 0.7 0.7 0.7
3000 0.7 0.7 0.7 0.7
10000 0.7 0.7 0.7 0.7
Reynolds NoPower No
