Combined process for processing heavy oil

Abstract

The invention discloses a group technology for heavy oil upgrading, in which the job steps include: (1) full or moiety of heavy oil individually or mixed with catalytic clarified oil entering solvent deasphalting plant, after the solvent deasphalting treatment, obtaining a deasphalted oil and a degreasing asphalt; (2) the degreasing asphalt obtained by step (1) individually or mixed with another moiety of heavy oil entering coking plant for coking treatment, in which the obtained tar heavy oil returns to solvent deasphalting plant or enters heavy oil hydrotreating plant, or moiety of tar heavy oil returns to solvent deasphalting plant and another moiety of tar heavy oil enters heavy oil hydrotreating plant, catalytic plant or hydrocracking plant; (3) the deasphalted oil obtained by step (1) individually or mixed with vacuum residual oil, non-pressure residual oil, pressure-relief residual oil, catalytic cycle stock and one or more than one heavy oil of tar heavy oil obtained by step (2) entering heavy oil hydrotreating plant for hydrotreatment, after hydrotreatment, obtaining fractions of benzin naphtha, plane kerosene and diesel and hydrogenating heavy oil. The invention can improve the charge-in nature, alleviate the operating condition and prolong the cycle length of the heavy oil hydrotreating plant, which provides better raw oil for downstream plants including catalytic plant.

Description

technical field [0001] The invention belongs to the technical field of petroleum refining, and relates to a technology for treating heavy oil by organically combining decarbonization and hydrogenation processes. Background technique [0002] With the rapid development of the global economy, the demand for light and clean fuel oil is also growing rapidly, and the quality of crude oil is getting worse and worse with the continuous increase of crude oil extraction, mainly manifested in high density, high viscosity, and high content of heavy metals , high sulfur content, high nitrogen content, high colloid and asphaltene content, which brings great difficulties to the processing of crude oil. [0003] There are two types of processing technology for heavy oil processing, one is hydrogenation process, mainly including hydrotreating, hydrofining, etc.; the other is decarbonization process, mainly including solvent deasphalting, coking, heavy oil catalytic cracking, etc. Heavy oil...

AI Technical Summary

Problems solved by technology

[0015] The purpose of the present invention is to solve the problems of harsh operating conditions of heavy oil hydrotreating units in the prior art and the difficulty of using hard asphalt, and develop a new process for the organic combination of decarbonization and hydrogenation of heavy oil, so that the metal content is high. Heavy oil with high content of , colloid and asphaltenes, high carbon residue, high sulfur content and high nitrogen content is processed through a combination of solvent deasphalting process and coking process