Agitator Power Requirement and Mixing Intensity Calculation
Agitator Power Requirement and Mixing Intensity Calculation
Agitator Power Requirement and Mixing Intensity Calculation
50.0
80.0
70.0
2.8
D/T Ratio
Agitator rpm
110
=
=
1100
100
0.6
Reynolds Number
Re
8132
Np
1.37
1.61
Pumping Number
Nq
0.6
Equivalent Diameter
Teq
5.00
9.9
13.6
Velocity
0.729
Fluid Properties
Density
Viscosity
Calculation
1) Reynolds Number
2)Power Requirement
Power Number
Power Required
(Assuming 80% Loading)
3) Mixing Intensity
4) Agitator required
No of Agitators Required
Z/T
=
=
2
1.40
in
in
in
m3
de Turbine
rpm
kg/m3
cp
Use 5.5 for Rushton six blade turbine & 3.2 for
concave 180 degree turbine
ft3/sec
ft2
ft/sec
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0.25
0.3
0.4
0.5
Chemineer HD3
Wide Hydrofoil
Pitched Blade Turbine
Rushton 6 Blade Turbine
180 Degree Concave
Wide Hydrofoil
80 degree concave
Back to data
sheet
Power Number
Narrow Hydrofoil
0.8
Power No
D/T=0.25
D/T=0.3
D/T=0.4
D/T=0.5
100
200
0.6
300
500
800
0.5
1200
3000
0.4
10000
0.73
0.53
0.47
0.41
0.38
0.36
0.33
0.33
0.71
0.52
0.45
0.39
0.37
0.34
0.32
0.32
0.69
0.49
0.42
0.37
0.34
0.32
0.3
0.29
0.68
0.46
0.4
0.35
0.32
0.3
0.28
0.27
Power Number
Reynolds No
0.7
0.3
0.2
0.1
0
100
1100
2100
3100
D/T = 0.25
4100
5100
6100
Reynolds Number
D/T = 0.3
D/T = 0.4
7100
D/T = 0.5
8100
100
mber
= 0.4
7100
D/T = 0.5
8100
9100
10100
11100
Wide Hydrofoil
Power Number
Power No
Reynolds
No
2.5
D/T=0.25
D/T=0.3
D/T=0.4
D/T=0.5
100
200
300 2
500
800
1.5
1200
3000
100001
2.28
1.78
1.56
1.3
1.14
1.09
1.06
1.06
2.24
1.75
1.53
1.29
1.12
1.08
1.05
1.05
2.15
1.69
1.48
1.24
1.09
1.05
1
1
2.11
1.65
1.45
1.23
1.08
1.03
0.98
0.98
0.5
0
100
1100
2100
3100
D/T=0.25
4100
D/T=0.3
5100
6100
Reynolds Number
D/T=0.4
710
D/T=0.5
100
6100
ynolds Number
D/T=0.4
7100
D/T=0.5
8100
9100
10100
11100
Power Number
Pitched Blade
2.5
Reynolds
2
No
100
200
1.5
300
500
800
1
1200
3000
10000
Power No
D/T=0.25
D/T=0.3
D/T=0.4
D/T=0.5
2.14
1.75
1.6
1.46
1.38
1.37
1.37
1.37
2.14
1.75
1.6
1.46
1.38
1.37
1.37
1.37
2.14
1.75
1.6
1.46
1.38
1.37
1.37
1.37
2.14
1.72
1.6
1.46
1.38
1.37
1.37
1.37
0.5
0
100
1100
2100
3100
4100
5100
6100
Reynolds Number
7100
00
6100
nolds Number
D/T=0.
25
D/T=0.
3
7100
8100
9100
10100
11100
Rushton 6 Blade
Reynolds
No
100
200
300
500
800
1200
3000
10000
D/T=0.25
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
Power No
D/T=0.3
D/T=0.4
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
D/T=0.5
5.5
5.4
5.5
5.5
5.5
5.5
5.5
5.5
Power No
D/T=0.3
D/T=0.4
3.6
3.6
3.2
3.2
3.2
3.2
3.2
3.2
3.2
3.2
3.2
3.2
3.2
3.2
3.2
3.2
D/T=0.5
3.6
3.15
3.2
3.2
3.2
3.2
3.2
3.2
D/T=0.25
3.6
3.2
3.2
3.2
3.2
3.2
3.2
3.2
Pumping Number
Chemineer HE3
Reynolds
0.6
No
100
200
0.5
300
500
0.4
800
1200
3000
0.3
10000
D/T=0.25
0.33
0.34
0.36
0.38
0.43
0.45
0.51
0.57
Power No
D/T=0.3
D/T=0.4
0.31
0.3
0.33
0.32
0.35
0.34
0.36
0.36
0.42
0.41
0.44
0.43
0.47
0.45
0.55
0.53
D/T=0.5
0.3
0.32
0.34
0.35
0.39
0.41
0.44
0.51
0.2
0.1
0
100
1100
2100
3100
4100
5100
6100
Reynolds Number
7100
100
6100
ynolds Number
D/T=0.
25
D/T=0.
3
7100
8100
9100
10100
11100
Pumping Number
Wide Hydrofoil
Reynolds
0.9 No
100
0.8 200
300
0.7 500
800
0.6 1200
3000
10000
0.5
Pumping
Number curve for Wide
Power No
D/T=0.25
0.44
0.54
0.58
0.64
0.67
0.71
0.77
0.8
D/T=0.3
0.41
0.48
0.51
0.57
0.6
0.62
0.69
0.73
D/T=0.4
0.36
0.43
0.45
0.51
0.54
0.57
0.62
0.63
D/T=0.5
0.35
0.4
0.43
0.46
0.48
0.5
0.55
0.56
Pitched Blade
0.4
Power No
Reynolds
No
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
0.2
200
0.55
0.5
0.45
0.41
300
0.6
0.54
0.48
0.44
0.1 500
0.66
0.61
0.54
0.47
800
0.7
0.65
0.57
0.5
0 1200
0.74
0.67
0.6
0.52
100
1100
21000.75 3100 0.66 4100 0.57 5100
6100
3000
0.82
Reynolds Number
10000
0.88
0.8
0.68
0.6
0.3
7100
810
6100
lds Number
D/T=0.
25
D/T=0.
3
7100
8100
9100
10100
11100
Pumping Number
Pitched Blade
1
Reynolds
No
0.9
100
2000.8
300
5000.7
8000.6
1200
0.5
3000
10000
0.4
D/T=0.25
0.45
0.55
0.6
0.66
0.7
0.74
0.82
0.88
Power No
D/T=0.3
D/T=0.4
0.42
0.37
0.5
0.45
0.54
0.48
0.61
0.54
0.65
0.57
0.67
0.6
0.75
0.66
0.8
0.68
D/T=0.5
0.36
0.41
0.44
0.47
0.5
0.52
0.57
0.6
0.3
0.2
0.1
0
100
1100
2100
3100
4100
5100
6100
Reynolds Number
7100
5100
6100
Reynolds Number
D/T=0.
25
D/T=0.
3
7100
8100
9100
10100
11100
Rushton 6 blade
Reynolds
No
100
200
300
500
800
1200
3000
10000
D/T=0.25
0.7
0.72
0.72
0.72
0.72
0.72
0.72
0.72
Power No
D/T=0.3
D/T=0.4
0.7
0.7
0.72
0.72
0.72
0.72
0.72
0.72
0.72
0.72
0.72
0.72
0.72
0.72
0.72
0.72
D/T=0.5
0.7
0.72
0.72
0.72
0.72
0.72
0.72
0.72
D/T=0.3
0.68
0.7
0.7
0.7
0.7
0.7
0.7
0.7
D/T=0.5
0.68
0.7
0.7
0.7
0.7
0.7
0.7
0.7
Power No
D/T=0.25
0.68
0.7
0.7
0.7
0.7
0.7
0.7
0.7
D/T=0.4
0.68
0.7
0.7
0.7
0.7
0.7
0.7
0.7