TURBINE MIXER
PRINCIPLE OF TURBINE:
Due to the combination of centrifugal and
rotational movement, turbine mixer
agitators can create turbulent movements
of fluids. This will effectively mix low to
medium viscosity fluids.
2
CONSTRUCTION:
Usually consist of a circle with several short blades attached.
Turbine diameters differ from propeller diameters by 0.13-0.57,
with 0.33:1 being the most common. Flat blade turbines
produce radial and tangential flow, but as speed increases,
radial flow takes over. Blade design may be straight, pitched,
curved, or disk type. The turbine rotates slower, usually
between 50 and 200 rpm, than propellers. Pitch bladed
turbines produce axial flow, which demonstrates high
turbulence and intense shear at the impeller zone. Diffuser
rings are used to further enhance turbine shear. Turbines are
enclosed in a stationary ring of perforated metal called a
3
diffuser ring.
WORKING & USES
Uses:
Working:
1. Extraction and
chemical reactions
are highly used
methods. Chemical
reactions in liquids
and gases, for
instance.
With a mixing blade, a drum or pan is filled with
material. The variable speed drill with a turbine
mixer whirls air into the mixture as it revolves.
Several different turbines and impellers are
included in the top entry turbine mixer to handle
both heat and mass transfer of liquids and solids.
The product does not get damaged when using
this type of mixer. A top-entry high-shear mixer
emulsifies and homogenizes materials uniformly.
The mixing blades revolve about a vertical axis.
2. A liquid used for
preparing
suspensions,
emulsions, and
syrups
4
ADVANTAGES &
DISADVANTAGES:
Advantages:
•
Emulsification is performed with turbines because their high
shearing forces allow them to produce a higher pumping rate
even at low pumping rates.
Disadvantages:
•
Despite its high viscosity, these mixers can mix high viscous
solutions of up to 7.0 Pa.s.
•
Dispersion containing 60% solids can be made with them.
•
With the addition of baffles in the tank, turbines can handle
liquids of large volume and high viscosity.
•
The mixing efficiency is high since they generate high radial
flows.
•
Low viscous materials with large volumes are used with a
turbine, which eliminates stagnant pockets by producing a
strong current.
•
Solvents with a viscosity greater
than 20 cP should not be used with
these filters.
• Mixing materials in an enclosed
space may result in oxidation due to
air entrapment
5
THANK YOU
Sumaya Tayeba
Reference:
https://www.pharmaguideline.com/20
07/02/principle-construction-workinguses-merits-demerits-turbines.html
6