Composite process for treatment of inferior residual oil

Abstract

The invention discloses a combined process method for treating inferior residual oil. The method comprises the following steps: a residual oil material enters a solvent deasphalting device to obtain DAO and deoil asphalt; the obtained DAO enters a hydrogenation device of a boiling bed and is treated to obtained a lightweight distillation fraction and hydrogenated tail oil; the hydrogenated tail oil enters a catalytic cracking device and is treated to obtain a lightweight distillation fraction and oil slurry; at least partial oil slurry and the deoil asphalt are mixed, enter a hydrogenation device of a suspension bed and are treated to obtain a lightweight distillation fraction and unconverted tail oil, wherein the unconverted tail oil circularly returns the solvent deasphalting device; and the lightweight distillation fraction and the DAO are mixed and enter the hydrogenation device of the boiling bed. The combined process course organically combines a decarbonization process and a hydrogenation process; and according to different properties of raw materials, a corresponding process and operation condition is adopted so as to maximize conversion of the residual oil material while minimizing equipment investment.

Description

technical field [0001] The invention relates to a method for producing light distillate oil from inferior residual oil, in particular to a combined method for producing light distillate oil by organically combining solvent deasphalting, fluidized bed hydrogenation, catalytic cracking and suspension bed hydrocracking processes. Background technique [0002] With the rapid development of the global economy, the demand for light and clean fuel oil is increasing rapidly, and the quality of crude oil is getting worse and worse, and the content of heavy components is getting higher and higher. How to effectively use non-renewable petroleum resources to achieve maximum lightness of residue Quality, production of high-value petroleum products is an important issue we are currently facing. [0003] The residual oil processing technology includes two types of processes: hydrogenation and decarbonization. The decarbonization process mainly includes solvent deasphalting, coking, heavy o...

AI Technical Summary

Problems solved by technology

When the process adopts the fluidized bed process to process the deoiled asphalt, because the deoiled asphalt is rich in a large amount of macromolecular polycyclic aromatic hydrocarbons, colloids and asphaltenes, the viscosity is high, and the fluidity is poor, so that the catalytic hydrogenation reaction of the fluidized bed mainly occurs in the catalyst. On the surface, macromolecular substances cannot enter the pores of the catalyst to react, so the utilization rate of the catalyst is low, resulting in frequent catalyst replacement and high cost

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