Turbine mixing element

In 1991, Burbank et ol. [121] of Werner Pfleiderer described Turbine Mixing Elements (TMEs) (Figure 6.23a). These elements are argued to be most effective in distributing low-viscosity or difficult to mix liquids in polymer melts. 

Figure6.23 Werner Pfleidererspecial mixingelements (a) Turbine Mixing Elements (TMEs) (b) Zahn Misch Elements (ZME). Courtesy of Werner, Pfieiderer.

Figure 9.24 (c) Werner and Pfieiderer Zahn-Misch-Element (ZME) (d) Werner and Pfieiderer turbin mixing element (TME)... 

We analyzed both a screw mixing element and turbine mixing element in this study. 

The method used for analyzing both the screw mixing element and the turbine mixing element is same except geometries. We set up a network of 2 dimensional elements through the system. If we make a mass or flow balance over any element we may write... 

The screw pumping characteristics for the screw mixing element and turbine mixing element are also calculated. As the power law indices become smaller, the dimensionless flow rates are significantly decreased for turbine mixing element and screw mixing element. 

Figure 5. Screw characteristic curves for a special mixing element (left), screw element (center) and turbine mixing element...

Kuhni Column Like the Scheibel column, the KUhni column uses shrouded (closed) turbine impellers as mixing elements on a central shaft (Fig. 15-49). Perforated partitions or stator plates extend... 

Figure 1. Screw mixing element (a) and turbine element (b)... 

Figure 7. Pressure gradient maps of the special mixing element(left) and the turbine element(right)...

Entrainment is an important element in the mixing operation and involves incorporation of low velocity fluid into the mass of the fluid stream or jet issuing from a source such as a mixing impeller. The axial flow from a propeller under proper physical conditions serves as a circular cross-section jet to produce mixing by turbulence and entrainment. The flat-blade turbine issues a jet for entrainment at the top and bottom, areas of the ring [2]. It is significant to estimate the relative amount of liquid involved due to entrainment, as this helps to describe the effectiveness of the operation. 

In each stage, the bottom part provides the gas supply to the rotating disk, the central cylindrical element provides the gas dispersion for mass transfer and biochemical reaction, and the upper part separates gas and liquid (or slurry). The flat rotating plate imparts very little mixing energy to the fluid, i.e., only 4% of that for turbine stirrers. As a result, the microorganisms do not... 

Perforated or slotted restrictor elements Compression elements Shearing elements Mixing turbines... 

Reactive compatibilization requires good dispersive and distributive mixing of reactants and sufficient residence time for the reaction to take place. The introduced components should be immediately uniformly mixed. Thus, appropriate mixing screw elements (kneading, turbine, etc.) should be placed in the reaction zone of the... 

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