滴流床反应器基于CFD的流体力学研究

Fluid dynamics study of trickle-bed reactor base on CFD

基于流体力学模拟软件用计算流体力学(CFD)方法对滴流床反应器进行数值模拟。应用ansys模拟了反应器的轴向气含率、压力降、温度分布、气液相轴向速度分布等数据,依据参考资料结果及实验数据对模拟结果进行检验,得出滴流床反应器对核心温度比较敏感,气液分布器的有效设计十分关键。综合流体流动和反应的模拟计算结果,该文研究的滴流床反应器内流动及反应一整套的框架,从模型的建立、网格划分、运行计算、和后处理的过程已基本成型,可为今后利用非实验手段研究滴流床反应器的设计及学习提供先行和指导作用。

Trickle-bed reactor is an important gas-liquid-solid three-phase catalytic reactor. It is widely used in petroleum refining,such as hydrogenation dearomatization,hydrotreating,hydrocracking,hydroisomerization,as well as fine chemicals,environmental engineering and other fields. Computational fluid dynamics（ CFD） is used. The trickle-bed reactor simulation was based on CFD simulation software,and CFD provides an effective way to design a reactor. Ansys CFX is used to simulate the axial gas holdup of the reactor,pressure drop,temperature distribution,gas and liquid axial velocity distribution,etc. The conclusion is that Trickle bed reactor is very sensitive to the core temperature,and effective design of vapor liquid distributor is the key. The results were tested based on the reference simulation results and experimental data. Base on the results of simulation and calculation of fluid flow and reaction,the framework of the flow and reaction in the trickle-bed reactor of this research,calculated from the model building process,meshing,run,and post-processing has basically taken shape. It can provide guidance for the study of first trickle bed reactor design and the use of non-experimental methods of learning in the future.