By Andrzej Stankiewicz, Jacob A. Moulijn
The 1st advisor to assemble present examine and frontline advancements within the technology of technique intensification (PI), this resource illustrates the layout, integration, and alertness of PI ideas and constructions for the improvement and optimization of chemical and commercial crops.
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Another interesting example of process-intensifying equipment, also undergoing commercialization, is the centrifugal adsorber. This is a new continuous device for carrying out ion exchange and adsorption processes. By using a centrifugal ﬁeld for establishing countercurrent ﬂow between the liquid phase and the adsorbent, very small adsorbent particles (10–50 µm) can be used. This allows for extremely compact separation equipment (see Figure 17) with very short contact times and high capacities (typically 10 –50 m3/h, (17)).
Reactive separations present probably the most signiﬁcant class of multifunctional reactors, of which reactive distillation is one of the better-known and commercially applied examples. The multifunctional reactor is in this case a packed distillation column, in which the packing material acts simultaneously as the catalyst carrier. Chemicals are converted on the catalyst and reaction products are continuously separated by fractionation (thus overcoming equilibrium limitations). Besides the continuous removal of the reaction products and higher yields due to the equilibrium shift, the advantages of catalytic distillation units consist mainly in lower energy requirements and lower capital investment (53).
1. Cantilevered Versus Centerhung Rotor Once the rotor dimensions of inside diameter, outside diameter, and axial height have been determined from the operating performance requirements, the rotor orientation on the shaft must be determined. Two options are available, cantilevered, also called overhung, and centerhung. These relate to the position of the rotor relative to the shaft and the support bearings. The cantilever design places the rotor at the end of the shaft, while the centerhung design positions the rotor in the middle of the shaft, with bearings on either side of the rotor.
Re-Engineering The Chemical Processing Plants by Andrzej Stankiewicz, Jacob A. Moulijn