Schopfheim, Germany
Schopfheim, Germany

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Weiss H.-J.,Ekato RMT | Himmelsbach W.,Ekato RMTs | Smith J.,Ekato Mixing Technology Ltd.
Chemical Engineering | Year: 2010

The mechanical design that helps in specifying, maintaining, and revamping agitated reactor systems is discussed. Mechanical seals play a critical role, resulting in safe and economic operation of pressurized reactors. Process design is often an interactive procedure of chemical and thermodynamic requirements on the one hand, and plant or mechanical restrictions on the other. The design of agitators and reactors starts by defining the process performance and operating conditions. The mechanical behavior of a structure, such as natural frequencies, stresses and deformations, can be ascertained with FEA. The agitator flange, together with its supporting structure, represents the most critical interface between agitator and vessel and hence requires special attention during the design phase. A careful choice of materials for the construction of the reactor is of great importance, and the material choice should take into consideration a wide range of chemicals with their different properties, the process conditions, hydraulic loads, temperatures, wear and corrosion.


Rohn N.,EKATO RMT | Stadtaus M.,EKATO RMT | Himmelsbach W.,EKATO RMT
Chemie-Ingenieur-Technik | Year: 2012

Numerical methods are established tools for the design of stirring systems. CFD describes flow conditions in the reactors and provides information on the process result. Dynamic loads of components due to the agitator flow can therefore be predicted reliably. They serve as input for the calculation of stresses and deformations using FEM. Especially turbulent flows induce dynamic loads that excite internals and bring them to resonance. Such conditions can be predicted by the modal analysis. The described tools contribute to the reliable design and efficiency of production. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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