The following thesis deals with wet flue-gas desulfurization (WFGD), which is a common industrial process applied mostly in fossil-fuel power plants. Due to emission of harmful pollutants such as SO2, power plant units are required to control the amount of gaseous pollutants emitted into the atmosphere. SO2 emissions are known to have detrimental impact on human health and the environment.
The purpose of this thesis is to numerically simulate the flow in the absorber for desulfurization of flue-gas. The objective is to define material and physical model for numerical simulation of flow and chemical reactions in absorber, to perform numerical simulations and to compare the results with experiments or work of related other authors. Since the main objective of the thesis deals with numerical simulations, it was developed a 3D model and the flow was simulated through the model by taking into account the mechanical, thermal, and chemical interactions of the flue-gas with the droplets of limestone suspension. The two-phase flow model of flue-gas and limestone slurry was modeled within the commercial CFD code Ansys Fluent 16.2. The continuous gas phase has been modeled with the Eulerian approach, while the dispersed phase with Lagrangian approach by tracking a large number of particles through the computational domain.
Annotation in English
The following thesis deals with wet flue-gas desulfurization (WFGD), which is a common industrial process applied mostly in fossil-fuel power plants. Due to emission of harmful pollutants such as SO2, power plant units are required to control the amount of gaseous pollutants emitted into the atmosphere. SO2 emissions are known to have detrimental impact on human health and the environment.
The purpose of this thesis is to numerically simulate the flow in the absorber for desulfurization of flue-gas. The objective is to define material and physical model for numerical simulation of flow and chemical reactions in absorber, to perform numerical simulations and to compare the results with experiments or work of related other authors. Since the main objective of the thesis deals with numerical simulations, it was developed a 3D model and the flow was simulated through the model by taking into account the mechanical, thermal, and chemical interactions of the flue-gas with the droplets of limestone suspension. The two-phase flow model of flue-gas and limestone slurry was modeled within the commercial CFD code Ansys Fluent 16.2. The continuous gas phase has been modeled with the Eulerian approach, while the dispersed phase with Lagrangian approach by tracking a large number of particles through the computational domain.
The following thesis deals with wet flue-gas desulfurization (WFGD), which is a common industrial process applied mostly in fossil-fuel power plants. Due to emission of harmful pollutants such as SO2, power plant units are required to control the amount of gaseous pollutants emitted into the atmosphere. SO2 emissions are known to have detrimental impact on human health and the environment.
The purpose of this thesis is to numerically simulate the flow in the absorber for desulfurization of flue-gas. The objective is to define material and physical model for numerical simulation of flow and chemical reactions in absorber, to perform numerical simulations and to compare the results with experiments or work of related other authors. Since the main objective of the thesis deals with numerical simulations, it was developed a 3D model and the flow was simulated through the model by taking into account the mechanical, thermal, and chemical interactions of the flue-gas with the droplets of limestone suspension. The two-phase flow model of flue-gas and limestone slurry was modeled within the commercial CFD code Ansys Fluent 16.2. The continuous gas phase has been modeled with the Eulerian approach, while the dispersed phase with Lagrangian approach by tracking a large number of particles through the computational domain.
Annotation in English
The following thesis deals with wet flue-gas desulfurization (WFGD), which is a common industrial process applied mostly in fossil-fuel power plants. Due to emission of harmful pollutants such as SO2, power plant units are required to control the amount of gaseous pollutants emitted into the atmosphere. SO2 emissions are known to have detrimental impact on human health and the environment.
The purpose of this thesis is to numerically simulate the flow in the absorber for desulfurization of flue-gas. The objective is to define material and physical model for numerical simulation of flow and chemical reactions in absorber, to perform numerical simulations and to compare the results with experiments or work of related other authors. Since the main objective of the thesis deals with numerical simulations, it was developed a 3D model and the flow was simulated through the model by taking into account the mechanical, thermal, and chemical interactions of the flue-gas with the droplets of limestone suspension. The two-phase flow model of flue-gas and limestone slurry was modeled within the commercial CFD code Ansys Fluent 16.2. The continuous gas phase has been modeled with the Eulerian approach, while the dispersed phase with Lagrangian approach by tracking a large number of particles through the computational domain.
The objective of thesis is to define material and physical model for numerical simulation of flow and chemical reactions in absorber for desulfurization of flue-gas, to perform numerical simulations and to compare the results with experiments or work of other authors.
It is expected to develop a 3D model, which takes into account the thermal, chemical and mechanical interaction of the flue-gas with droplets of lime suspension. It is recommended to use Ansys-Fluent or OpenFOAM software for simulations.
Structure of the thesis:
Literature overview.
Overview of mathematical models of mass transfer and multiphase flow.
Preparation and testing of the numerical model.
Numerical simulation of the wet scrubber.
Evaluation and discussion of the results.
Research Plan
The objective of thesis is to define material and physical model for numerical simulation of flow and chemical reactions in absorber for desulfurization of flue-gas, to perform numerical simulations and to compare the results with experiments or work of other authors.
It is expected to develop a 3D model, which takes into account the thermal, chemical and mechanical interaction of the flue-gas with droplets of lime suspension. It is recommended to use Ansys-Fluent or OpenFOAM software for simulations.
Structure of the thesis:
Literature overview.
Overview of mathematical models of mass transfer and multiphase flow.
Preparation and testing of the numerical model.
Numerical simulation of the wet scrubber.
Evaluation and discussion of the results.
Recommended resources
\matsymb{lbrack}1\matsymb{rbrack} CROWE, C., SOMMERFELD, M., TSUJI, Y., 2011.Multiphase flows with droplets and particles.CRC Press.
\matsymb{lbrack}2\matsymb{rbrack} Ansys Inc. 2012. Fluent User´s Guide Release 14.5
\matsymb{lbrack}3\matsymb{rbrack} BES, A., 2005.Dynamic Process Simulation of Limestone Calcination in Normal Shaft Kilns.Fakultät für Verfahrens und Systemtechnik der Otto von Guericke Universität Magdeburg.
\matsymb{lbrack}4\matsymb{rbrack} XU, J. et al., 2010.Numerical Study of the Effects of Flue Gas Inlet Type for the Flue Gas Desulfurization Wet Scrubber, Chemical Engineering Transactions, Volume 21.
Recommended resources
\matsymb{lbrack}1\matsymb{rbrack} CROWE, C., SOMMERFELD, M., TSUJI, Y., 2011.Multiphase flows with droplets and particles.CRC Press.
\matsymb{lbrack}2\matsymb{rbrack} Ansys Inc. 2012. Fluent User´s Guide Release 14.5
\matsymb{lbrack}3\matsymb{rbrack} BES, A., 2005.Dynamic Process Simulation of Limestone Calcination in Normal Shaft Kilns.Fakultät für Verfahrens und Systemtechnik der Otto von Guericke Universität Magdeburg.
\matsymb{lbrack}4\matsymb{rbrack} XU, J. et al., 2010.Numerical Study of the Effects of Flue Gas Inlet Type for the Flue Gas Desulfurization Wet Scrubber, Chemical Engineering Transactions, Volume 21.