催化剂颗粒撞击壁面的有限元分析

Catalyst particle impact wall of finite element analysis

针对催化裂化过程中催化剂颗粒大量跑损的问题,采用有限元的方法建立了单颗催化剂颗粒撞击壁面的有限元模型,并运用Abaqus作为前处理器。催化剂颗粒是一种典型的脆性材料,在有限元模型中选取了相应的材料本构模型,模拟了不同参数(撞击形态、入射速度、入射角度)的催化剂颗粒撞击壁面的过程,建立了催化剂颗粒的质量损失与催化剂颗粒参数间的关系,并对模拟结果进行了分析。最后,根据数值模拟的结果,优化了催化剂颗粒的参数,提出了减少催化剂跑损的措施。研究结果表明,撞击过程中的不同催化剂颗粒参数对催化剂的磨损量会产生较大的影响,催化剂颗粒的磨损量随着入射速度和入射角度的增大而增大,当催化剂颗粒以45°的形态撞击壁面时,磨损量最小。

Aiming at the problem of catalyst running loss in the process of catalytic cracking,a finite element model that a single particle of catalyst impact wall was established,and Abaqus was used as preprocessor.Catalyst particle is typical brittle material,the correct model of the material was established.The process that different parameters（impact form,incidence rate,incidence angle） of the catalyst particle impact wall was simulated,the relationship between quality of catalyst particle loss and the parameters of the catalyst particle was built,and the calculation results were analyzed.Finally,according to the calculation results,the parameters of the catalyst particle were optimized,and the measure of reduing catalyst running loss was put forward.The results indicate that the parameters of the catalyst particle affect the wear loss of catalyst particle,the wear loss of catalyst particle increases with the increased of impact velocity and angles.The wear loss of catalyst particle is the minimum when catalyst particle impact the wall as an angle of 45 degrees.