Deep Filtration Of Fluid Catalytic Cracking Oil Slurry

Fluid catalytic cracking(FCC)slurry is an unconverted hydrocarbon with a boiling point greater than 350℃ during the catalytic cracking process.It is a high-quality raw material to produce high value-added products such as carbon black,needle coke,carbon fiber,and rubber softener,but related industries High content requirements,have strict regulations.Therefore,according to the composition and characteristics of the catalytic cracking slurry,adopting a separation process that is efficient,economical,safe,convenient,and long-term operation to separate the solid catalyst powder and the heavy oil slurry is a prerequisite for the development of high value-added chemical and oil refining products.It is also a prerequisite for catalyst recycling and resolving secondary pollution to avoid coking of the device.This article mainly analyzes the mechanism of deep filtration and analyzes the factors that influence the filtration efficiency from a theoretical perspective.A deep filtration experimental device for catalyzing the purification and separation of oil slurry was developed.Micro-CT,CFD,and particle size analysis methods were used to study the deep filtration process.The effects of operating temperature,pressure,viscosity of the oil slurry,particle size of the filter medium,and height of the bed on the purification efficiency of the oil slurry were examined.The experimental results show that when the thickness of the filter layer is 600mm,the grain size of silica sand is 200μm,and the temperature is 150℃,the solid-slurry ratio of the catalytic oil slurry can be reduced from 8548ppm to 122ppm through deep filtration.By adding diesel oil to reduce the viscosity and filtering,the solid content of the catalytic oil slurry can be reduced from 727.3 ppm to 20.1 ppm when the thickness of the filter layer is 600 mm,the particle size of silica sand is 200 μm,and the temperature is 150℃.This article also designed an industrial application process that catalyzes the de-slugging of externally slid slurry,and uses a three-phase separator for backwashing of deep filtration devices,providing a new solution to the industrialization of catalytic slurry cleaning.