Method for processing inferior heavy oil

Abstract

The invention provides a method for processing inferior heavy oil. The method comprises the following steps: adopting a riser and a bed reactor to preheat the inferior heavy oil raw material, injecting the preheated raw material in a riser reactor, keeping the raw material in contact with solid catalysis grains in the riser and taking reaction, controlling the riser reaction temperature at 550-610 DEG C, introducing the oil gas after reaction to the upper-layer tandem bed reactor through the riser reactor to continuously react, keeping the bed reactor temperature at 440-520 DEG C, and weight hourly space velocity at 0.5-5 h-1, separating the oil gas after reaction from the contained solid catalysis grains, and sending the oil gas to a fractionating system, wherein the specific surface area of the solid catalysis grains is larger than 80 m<2> . g<-1>; the pore volume is larger than 0.22 ml / g; the abrasion index is smaller than 2.0%; the micro-activity index is 20-50. The method provided by the invention can effectively remove carbon residue, heavy metal, asphaltene and other impurities from the inferior heavy oil, synchronously obtain higher yield of the liquid product, and is simple in the processing technology.

Description

technical field [0001] The invention relates to a method for processing low-quality heavy oil, which belongs to the technical field of petrochemical industry. Background technique [0002] In the refining industry, low-quality heavy oil generally refers to heavy oil fractions with high boiling point, high carbon residue, high metal content, and high asphaltenes, and its types usually include vacuum residue, heavy oil residue from solvent separation process, deoiled bitumen, and oil sands asphalt etc. Inferior heavy oil has low commercial value. On the one hand, it cannot be directly used as fuel oil due to its nature restricted by environmental protection regulations. On the other hand, due to the high asphaltene content, heavy metal content and high carbon residue value, it is very easy to cause permanent catalyst contactors. Deactivation and unit coking shut down, so it cannot be used as feed for conventional catalytic cracking, hydrotreating and delayed coking processes....

AI Technical Summary

Problems solved by technology

Although the inert porous microsphere heat carrier used in this process can remove carbon residues, asphaltenes and metal impurities, and can process low-quality heavy oil with high carbon residues and high density (such as Iranian vacuum residue), the obtained Poor product distribution, low gas, diesel and overall liquids yields

Images