# Agitator Power Requirement and Mixing Intensity Calculation

July 17, 2017 | Author: mpshah298 | Category: Chemical Reactor, Liquids, Fluid Dynamics, Soft Matter, Gas Technologies

#### Short Description

Download Agitator Power Requirement and Mixing Intensity Calculation...

#### Description

Reactor Geometry 4 Diameter of the reactor

T

=

50.0

4 Height of the cylindrical portion

H

=

80.0

4 Liquid level height in the reactor from bottom

Z

=

70.0

V

=

2.8

Total Volume of the reactor

1 Select the type of Agitator

4 D/T Ratio Agitator rpm

m3

0.5 N

=

110

rpm

ρ µ

= =

1100 100

kg/m3 cp

Diameter of the agitator

D

=

0.6

Reynolds Number

Re

=

8132

Np

=

1.37

P

=

1.61

Pumping Number

Nq

=

0.6

Equivalent Diameter

Teq

=

5.00

ft

Volumetric flow rate

Q

=

9.9

ft3/sec

Cross sectional area

A

=

13.6

ft2

Velocity

V

=

0.729

ft/sec

Fluid Properties Density Viscosity

Calculation 1) Reynolds Number m

2)Power Requirement Power Number Power Required (Assuming 80% Loading)

hp

Select the value from Pow Reynolds number Use 5.5 for Rushton six bla concave 180 degree turbin

3) Mixing Intensity

4) Agitator required

Select the value from Pum on Reynolds number Use 0.72 for Rushton six bl for concave 180 degree tur

No of Agitators Required Z/T

= =

2 1.40

0.25 0.3 0.4 0.5

Chemineer H Wide Hydrof Pitched Blade Rushton 6 Bla 180 Degree C

ue from Power number chart based on ber shton six blade turbine & 3.2 for egree turbine

ue from Pumping number chart based umber ushton six blade turbine & 0.7 0 degree turbine

Chemineer HD3 Wide Hydrofoil Pitched Blade Turbine Rushton 6 Blade Turbine 180 Degree Concave

Wide Hydrofoil

180 degree concave

Back to data sheet

Back to data sheet

Power Number

Power Number Narrow Hydrofoil 0.8 Power No Reynolds D/T=0.25 0.7 No 100 0.73 200 0.53 0.6 300 0.47 500 0.41 0.5 800 0.38 1200 0.36 3000 0.33 0.4 10000 0.33

Power Number Curve for Chemineer HE3 D/T=0.3

D/T=0.4

D/T=0.5

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

0.3

0.2

0.1

0 100

1100

2100

3100

4100

5100

6100

7100

8100

9100

Reynolds Number D/T = 0.25

D/T = 0.3

D/T = 0.4

D/T = 0.5

er HE3

10100 D/T = 0.5

11100

Power Number

Wide Hydrofoil Power No Reynolds D/T=0.25 No2.5 100 2.28 200 1.78 2 300 1.56 500 1.3 800 1.14 1.5 1200 1.09 3000 1.06 100001 1.06

Power Number Curve for Wide Hydrofoil D/T=0.3

D/T=0.4

D/T=0.5

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

2100

3100

0.5

0 100

1100

4100

5100

6100

7100

8100

Reynolds Number D/T=0.25

D/T=0.3

D/T=0.4

D/T=0.5

Hydrofoil

8100

D/T=0.5

9100

10100

11100

Power Number curve for Pitched blade turbine

Power No

Power Number

Reynolds D/T=0.25 2 No 100 2.14 200 1.75 1.5 300 1.6 500 1.46 800 1.38 1 1200 1.37 3000 1.37 10000 1.37 0.5

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 1.72 1.6 1.46 1.38 1.37 1.37 1.37

0 100

1100

2100

3100

4100

5100

6100

Reynolds Number

7100

8100

D/T=0.25 D/T=0.3 D/T=0.4 D/T=0.5

8100

9100

10100

11100

Rushton 6 Blade Reynolds No D/T=0.25 100 5.5 200 5.5 300 5.5 500 5.5 800 5.5 1200 5.5 3000 5.5 10000 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

180 Degree Concave Reynolds No D/T=0.25 100 3.6 200 3.2 300 3.2 500 3.2 800 3.2 1200 3.2 3000 3.2 10000 3.2

Chemineer HE3

Pumping Number curve for HE3 Impeller

Pumping Number

Reynolds 0.6 No D/T=0.25 100 0.33 200 0.34 0.5 300 0.36 500 0.38 0.4 800 0.43 1200 0.45 0.3 3000 0.51 10000 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

8100

HE3 Impeller

D/T=0.25 D/T=0.3 D/T=0.4 D/T=0.5

8100

9100

10100

11100

Pumping Number

Wide Hydrofoil Reynolds 0.9 No D/T=0.25 100 0.44 0.8 200 0.54 300 0.58 0.7 500 0.64 800 0.67 0.6 1200 0.71 3000 0.77 0.5 10000 0.8

Pumping Number curve for Wide Hydrofoil

Power No D/T=0.3 D/T=0.4 0.41 0.36 0.48 0.43 0.51 0.45 0.57 0.51 0.6 0.54 0.62 0.57 0.69 0.62 0.73 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 Reynolds 0.3 No 0.2 100 200 0.1 300 500 0 800 1200 100 3000 10000

Power No D/T=0.25 D/T=0.3 D/T=0.4 D/T=0.5 0.45 0.42 0.37 0.36 0.55 0.5 0.45 0.41 0.6 0.54 0.48 0.44 0.66 0.61 0.54 0.47 0.7 0.65 0.57 0.5 0.74 21000.67 3100 0.6 4100 0.525100 1100 6100 0.82 0.75 0.66 0.57Reynolds Number 0.88 0.8 0.68 0.6

7100

8100

de Hydrofoil

D/T=0.25 D/T=0.3 D/T=0.4 D/T=0.5

9100

10100

11100

Pumping Number curve for PBT

Pumping Number

1 Reynolds No D/T=0.25 0.9 100 0.45 0.8 200 0.55 3000.7 0.6 500 0.66 0.6 800 0.7 1200 0.74 0.5 3000 0.82 0.4 10000 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

8100

ve for PBT

D/T=0.25 D/T=0.3 D/T=0.4 D/T=0.5

8100

9100

10100

11100

Rushton 6 blade Reynolds No D/T=0.25 100 0.7 200 0.72 300 0.72 500 0.72 800 0.72 1200 0.72 3000 0.72 10000 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

180 Degree Concave Reynolds Power No No D/T=0.25 100 0.68 200 0.7 300 0.7 500 0.7 800 0.7 1200 0.7 3000 0.7 10000 0.7

D/T=0.4 0.68 0.7 0.7 0.7 0.7 0.7 0.7 0.7