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Technische Universität München

Technische Universität München

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Master's thesis

Flowsheet Simulation

Process Flowsheet

25.10.2017, Abschlussarbeiten, Bachelor- und Masterarbeiten

Many industries involve particulate processes, where particles pass through a set of steps such as crystallization, milling, and classification according to their size. Better understanding of such processes can be gained by simulation. The goal of this thesis is the implementation of a process flowsheet in the software tool Dyssol.

What do an aspirin tablet, a bag of cement, eyeshadow and a box of powder sugar have in common? Each of these products involves particles and particulate processes, which is typical for chemical, pharmaceutical and food industries. The production may consist of different steps where particles are created (for example, by crystallization) and further processed in order to obtain the desired size distribution (for example, by milling). Particles that do not fulfill the size specifications may be removed (for example, in a hydrocyclone) and may re-enter the process in order to further modify their size. An example of such a process flowsheet is presented in the attached figure.

Particulate engineering can be made more efficient if each process, along with the influencing parameters, is well understood. Apart from experiments, such knowledge can also be gained from simulations. These simulations involve solving a coupled system of (partial) differential and algebraic equations. The available simulation software is typically problem-specific. General-purpose solutions, where several, interconnected, time-dependent processes can be simulated, are still being developed.

A paper by Kulikov et al. (2005) presents a simulation of the pentaerythritol process flowsheet from the attached figure. That solution involves coupling of several software tools, each simulating one process step. The goal of this thesis is the implementation of the process flowsheet in the general-purpose software Dyssol, where all of the process steps can be simulated at once. The implementation is done in the programming language C++. Necessary is an interest in particle simulation and programming.

Kontakt: tijana.kovacevic@mytum.de