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Agitation Tasks
Pfaudler - Glass-Lined & Alloy Systems
Technologies
Mixing Tasks
There are multiple specific mixing tasks in glass-lined reactors. Several tasks can appear simultaneously. This occurs in the process industry. Optimized results (product quality, process time, productivity, and so on) are obtained in the configuration of the most suitable agitator, assuring the task is carried out in the shortest time, at the lowest cost.
Pfaudler’s range of glass-lined turbines offers the best answer to fulfil these requirements:
CBT : Curved Blade Turbine
CBR : Curved Blade for low residual volume
TBF : Turbofoil
TBX : Turbofoil X-Shape
MFI: Multiple Flyer Impeller
PBT : Pitched Blade Turbine
FBT : Flat Blade Turbine
MSG: Multistage Counterflow
MXT: Maxflow Turbine
GST: Gas Dispersion Turbine
ANC : Anchor
RBT: Ring Blade Turbine
FDT: Foam Destruction Turbine
RCI : Retreat Curved Impeller
Homogenization
Definition: Generation of a uniform phase of several mutually soluble liquids. Compensation of temperature and concentration differences. Recommended Pfaudler turbines:
Low – medium viscosity: CBT, TBF, MSG, RBT
Medium – high viscosities: CBT, MXT, MSG
Suspension
Definition: Whirling up and suspending a solid in a liquid for the purpose of dissolving or performing chemical reactions Recommended Pfaudler turbines:
Low – medium viscosity: TBF, CBR, MXT, MSG
Medium – high viscosity: MXT, MSG
Crystallization
Definition: Generating crystals e.g. by cooling down a liquid.
Recommended Pfaudler turbines:
Low – medium viscosity: TBF, MXT, MSG, RBT
Medium – high viscosity: TBF, MXT, MSG
Heat Transfer
Definition: Heating/cooling media by supplying/removing reaction heat.
Recommended Pfaudler turbines:
Low – medium viscosity: TBF, CBT, MSG, MXT, MFI
Medium – high viscosities: MSG, CBT, ANC, MFI
Dispersion / Emulsion (liquid/liquid)
Definition: Generation of a fine dispersion of two non-miscible liquids to enlarge the phase separation surface in order to intensify the mass transfer.
Recommended Pfaudler turbines: FBT for entire viscosity range.
Polymerization
Definition: Generating a flow pattern of liquids in order to allow for the formation of polymer particles and keep them in suspension until their complete conversion.
Recommended Pfaudler turbines: RCI for entire viscosity range, TBF for low viscosity applications and/or gentle treatment of the polymers.
Dispersion (liquid/gas)
Definition: Generate small bubbles of gas to maximaze reaction surface.
Recommended Pfaudler turbine: GST, FBT, CBT.
CFD – Computed Fluid Dynamics
For difficult agitator duties, yield improvement, maximizing energy inputs and/or refurbishing existing (not only glass-lined) agitators, Pfaudler provides optimization services through CFD analysis. Based on the end user’s process description, agitator tasks, product properties and/or sketches in case of existing equipment, Pfaudler will design the specific system and calculate data, such as:
- Flow pattern, directions, velocities
- Shear forces/shear constant surfaces
- Local and global power input
- Pressure gradients
- Temperature gradients/temperatures
- Solid suspension particle lines
- Heat flow
Resulting data, and computed pictures and videos are the tools for Pfaudler’s process engineers to design perfect agitator configurations.
CFD in Mixing Technology
