Simulation And Analysis Of Multiphase Flow In Residual Oil Hydrogenation Of Ebullated Bed Under Cool Model

In recent years,the petrochemical industry has developed more and more in the face of the shortage of petroleum resources,the increasing degree of crude oil requalification,the volatile international oil prices and the continuous upgrade of fuel quality standards,and the pressure of increasingly strict pollutant discharge requirements.It tends to take the road of deep processing of residue oil,environmental friendliness and product cleanliness.In this paper,commercial CFD software is used to numerically simulate the STRONG fluidized bed residue hydrogenation reactor under cold mold conditions,and a new circulating structure model is proposed to analyze the liquid phase residence time distribution curve with circulating flow;further Ground,the existing reactor structure has been improved and optimized;finally,on this basis,a simple reaction kinetics and a complex reaction kinetic model were studied.The results show that:(1)The increase in gas velocity and the improvement of the reactor structure are of positive significance for improving the fluid flow characteristics,liquid phase mixing characteristics and reaction characteristics.(2)Increased liquid phase velocity can significantly improve the mixing characteristics of the liquid phase,but will adversely affect the flow characteristics.(3)The increase in particle diameter can improve the liquid mixing characteristics to a certain extent,but it will have an adverse effect on the fluid flow characteristics and liquid phase reaction characteristics.(4)The increase in bubble diameter adversely affects the fluid flow characteristics,liquid phase mixing characteristics and reaction characteristics.