Numerical Simulation And Analysis Of The Non-spherical Catalyst Particles Impacting Onto Surface Of Component

In the process of catalytic cracking, lots of catalyst particles circulating in the catalytic cracking unit and impact to many components. A large number of particles impact to the catalytic cracking unit brought out erosion and resulted in the accident, which caused great losses to the oil refining industry, so it’s meaningful to analysis the impacting process of catalyst particles. In this paper, according to the result of numerical simulation, the best parameters of the equipment was proposed and the theoretical basis and technical which support for long-term operation of catalytic cracking unit was raised.In this paper, according to the features of the catalyst particles impact with the components, the basic theory of the impact process at home and abroad was introduced. For closer to practical problems, the proper simulation models of non-spherical and component was established with finite element, after verify the accuracy of the model, corresponding failure model was chosen according to the material properties of catalyst particles and components. Considering the impact of the actual complexity of the issues and numerous parameters, the parametric analysis method was used to analysis the wear effect of the catalyst particle parameters(impact speed, angle of impact, the impact number and diameter), the connection between the mass loss of component wall and the above parameters was built.According to the research of impacting between the single particle and component, the process of impacting between granular flow and component was researched. For the problem of impacting between catalyst particles collisions and springback particles, it simulated and got the impact stress in real situation by the way of coupling finite element method and discrete element method, and investigated the affect between parameters of granular flow and component wear.It’s helpful of learning the character of catalyst particles impact component through the above research, providing reference value of evaluation the capacity of component resist catalyst particle’s impact.