Filler cleaning is a challenge that affects the efficient separation of FCCS particles by electrostatic methods and limits the utilization of the oil slurry.Two filler cleaning methods are proposed in this paper,the f...Filler cleaning is a challenge that affects the efficient separation of FCCS particles by electrostatic methods and limits the utilization of the oil slurry.Two filler cleaning methods are proposed in this paper,the flushing desorption method and the electrostatic desorption method,where desorption is achieved by respectively applying a flow field or an electric field to the fillers immersed in a cleaning solution(ethyl acetate).Also,the“rough particle-smooth plane”contact model between particles and filler was established,and the particle force model was established by analyzing the movement of particles in the process of cleaning.Furthermore,combining the established contact model and force model,the detachment model of particles was proposed.In this model,the dimensionless numberλis used to discriminate the attachment state of particles whose validity was verified by experiments.The experimental results showed that the cleaning efficiency of flushing desorption method and electrostatic desorption method increase with the increase of flow rate and voltage,which reached 50.5%and 61.4%at 0.1 m/s and 14 kV.展开更多
Catalytic cracking is the main method to lighten heavy crude oil,this process can produce high quality oil products such as gasoline and diesel,but also produces a large amount of fluid catalytic cracking slurry(FCCS)...Catalytic cracking is the main method to lighten heavy crude oil,this process can produce high quality oil products such as gasoline and diesel,but also produces a large amount of fluid catalytic cracking slurry(FCCS).The catalyst particles in FCCS seriously restrict the secondary processing of FCCS and need to be removed,and the properties of Fccs is an important factor that affects the removal efficiency of the catalyst particles.Based on the"effective contact point"model proposed by the research group,this study further proposed the"electrostatic separation efficiency calculation"model.In this model,since Fccs has a uniform distribution of catalyst particles,the ratio of the number of catalyst particles can be expressed as the ratio of area to achieve the calculation of separation efficiency.Then the catalyst removal efficiency under different viscosity was analyzed,thus verifying the feasibility of this model.The effects of temperature and mass ratio of four components on the viscosity of FccS were investigated respectively,then the effects of temperature and four components'mass ratio on the electrostatic sep-aration can be directly converted into the effect of viscosity on the electrostatic separation efficiency.All the results show the electrostatic separation efficiency decreases with increasing viscosity,and the best separationtemperatureis120℃.展开更多
基金funded by the National Natural Science foundation of China(No.52476043).
文摘Filler cleaning is a challenge that affects the efficient separation of FCCS particles by electrostatic methods and limits the utilization of the oil slurry.Two filler cleaning methods are proposed in this paper,the flushing desorption method and the electrostatic desorption method,where desorption is achieved by respectively applying a flow field or an electric field to the fillers immersed in a cleaning solution(ethyl acetate).Also,the“rough particle-smooth plane”contact model between particles and filler was established,and the particle force model was established by analyzing the movement of particles in the process of cleaning.Furthermore,combining the established contact model and force model,the detachment model of particles was proposed.In this model,the dimensionless numberλis used to discriminate the attachment state of particles whose validity was verified by experiments.The experimental results showed that the cleaning efficiency of flushing desorption method and electrostatic desorption method increase with the increase of flow rate and voltage,which reached 50.5%and 61.4%at 0.1 m/s and 14 kV.
基金supported by the[Natural Science Foundation Project of Shandong Province#1]under Grant[ZR2019MEE033][Fundamental Research Funds for the central Universities#2]under Grant[19CX02035A].
文摘Catalytic cracking is the main method to lighten heavy crude oil,this process can produce high quality oil products such as gasoline and diesel,but also produces a large amount of fluid catalytic cracking slurry(FCCS).The catalyst particles in FCCS seriously restrict the secondary processing of FCCS and need to be removed,and the properties of Fccs is an important factor that affects the removal efficiency of the catalyst particles.Based on the"effective contact point"model proposed by the research group,this study further proposed the"electrostatic separation efficiency calculation"model.In this model,since Fccs has a uniform distribution of catalyst particles,the ratio of the number of catalyst particles can be expressed as the ratio of area to achieve the calculation of separation efficiency.Then the catalyst removal efficiency under different viscosity was analyzed,thus verifying the feasibility of this model.The effects of temperature and mass ratio of four components on the viscosity of FccS were investigated respectively,then the effects of temperature and four components'mass ratio on the electrostatic sep-aration can be directly converted into the effect of viscosity on the electrostatic separation efficiency.All the results show the electrostatic separation efficiency decreases with increasing viscosity,and the best separationtemperatureis120℃.
