Analytical and Numerical Approaches in Studying Immersed De-carbonization in RH-plants

摘要

In this paper the de-carbonization rate of RH plants is studied by means of analytical and numerical approaches. In the first case the RH-plant is recognized as a one-dimensional looping reactor. The corresponding mathematical modelling provides a system of ordinary differential equations (ODE's). In the second case the flow pattern inside the RH-plant is modelled by means of a three-dimensional numerical simulation. In both cases emphasis is placed on the coupling between the immersed gas bubbles, the local de-carbonization reaction and the recirculation rate. Furthermore, the influence of gas expansion on the gas hold-up and thus on the recirculation and reaction rate is addressed. After a general presentation of the modelling concepts the individual strengths and weak-points of both approaches are discussed.