Quenching runaway reactions : hydrodynamics and jet injection studies for agitated reactors with a deformed free-surface

摘要: To quench a thermal runaway reaction in chemical rector, an efficient approach is the introduction of small quantity liquid inhibiting agent, named “killer”, into mixing vessel. In this thesis, experimental has been coupled tightly with numerical modelling using Computational Fluid Dynamics (CFD). The first part thesis devoted to study hydrodynamics partially-baffled vessels, including free-surface deformation caused by central vortex. use inhomogeneous, multiphase allowed simulation deformation. capability novel method was demonstrated very good agreement between predictions and data. second part, jet injection at vessel hydrodynamics. Numerical results, obtained Eulerian-Lagrangian approach, have again shown These results trajectory be modelled its penetration agitated quantified. New criteria were introduced that are specific application. Finally, methods validated pilot scale applied industrial proposal practical improvements safety synthesis reactors studied