Inferior heavy oil treatment method

Abstract

The invention discloses an inferior heavy oil treatment method. The treatment method comprises the following steps: introducing inferior heavy oil into a first hydro-processing unit; carrying out a hydrogenation reaction in the presence of hydrogen and a first hydro-processing catalyst, directly introducing a liquid phase effluent obtained after the reaction into a catalytic cracking unit withoutfractionation, separating a reaction product to obtain catalytic slurry oil, mixing the catalytic slurry oil with a first auxiliary agent, carrying out settlement separation after the mixing treatment, obtaining a first material and residues after separation; introducing the first material into a second hydro-processing unit, carrying out a hydrogenation reaction under the action of a second hydro-processing catalyst and hydrogen, introducing a liquid-phase effluent obtained after the reaction into a clarification unit, obtaining clarified oil after separation, and subjecting the clarified oilto further solid-liquid separation to obtain purified oil slurry. According to the treatment method, heavy oil is cleaned, catalytic slurry oil generated by catalytic cracking can be purified, solidsand sulfur in catalytic slurry oil are removed, and the economic value of the catalytic slurry oil is greatly increased.

Description

technical field [0001] The invention belongs to the field of oil refining and chemical industry, and in particular relates to a method for processing inferior heavy oil. Background technique [0002] As crude oil becomes heavier and inferior, the proportion of residual oil, which is the heaviest component in crude oil, continues to increase. With increasingly stringent environmental protection requirements, the efficient use of heavy oil, especially residual oil, is not only related to whether it can meet The requirements of cleaner production have also become an important factor affecting the economic benefits and even the survival of enterprises. From the traditional processing methods of residual oil, residual oil processing can be divided into two routes: hydrogenation and decarburization. Decarburization mainly refers to thermal cracking, visbreaking and solvent deasphalting, etc., while hydrogenation routes can be divided into fixed Bed hydrogenation, suspension bed h...

AI Technical Summary

Problems solved by technology

[0007] The traditional heavy oil thermal processing technology has the problems of low liquid yield and serious pollution, while the catalytic oil slurry obtained by the heavy oil catalytic cracking technology has the problem of high solid content and small particle size, and there is a loss of liquid yield when the catalytic oil slurry is treated by conventional filtration. High, incomplete removal of catalyst powder, easy clogging of filters, frequent backwashing, and unstable operation of filter devices, most of the catalytic oil slurry can only be used as feed to the coking unit, and a large amount of low-value coke is produced by-product, catalytic oil slurry value is not fully realized

Images