Static experimental study on pre-coating and filtration of FCC slurry with diatomite
There were solid catalyst particles in the Fluid Catalytic Cracking(FCC)slurry.If not removed,these catalyst parti-cles would flow with the fluid and impact the inner wall of subsequent processing equipment,causing the wear and aggravating the corrosion of equipment.In order to prevent the filter tube from being blocked by the micelles in the slurry during the removing process,a filtration method of diatomite pre-coating was presented.To determine the optimal operating conditions,single factor experiments and orthogonal experiments were conducted to analyze and screen the four most important factors,namely diatomite particle size,coating thickness,slurry temperature,and operating pressure.The single factor test results showed that the purifi-cation efficiency was negatively correlated with operating pressure and diatomite particle size,but positively correlated with coat-ing thickness and slurry temperature.The orthogonal test results indicated that the order of factors affecting purification efficiency from primary to secondary were operating pressure,diatomite particle size,coating thickness and slurry temperature.The operat-ing conditions with the highest purification efficiency were diatomite particle size of 10 µm,coating thickness of 40 mm,slurry temperature of 130 ℃ and operating pressure of 0.2 MPa.In actual production,considering the purification efficiency,energy consumption and production efficiency of the unit,the optimal operating conditions were diatomite particle size of 100 μm,coat-ing thickness of 40 mm,oil slurry temperature of 100 ℃ and operating pressure of 0.2 MPa.
万方数据
维普
