A processing method for inferior heavy oil and/or inferior residual oil

Abstract

The invention relates to an inferior heavy oil and / or inferior residual oil processing method. The method includes: feeding inferior heavy oil and / or inferior residual oil into a slurry bed reactor to realize first hydrogenation reaction, and adding obtained products into a high-pressure separator to realize separation, so that hydrogen-containing gas is obtained from the top of the high-pressure separator, liquid components are obtained from the middle of the high-pressure separator, and heavy materials are obtained from the bottom of the high-pressure separator; separating the heavy materials to obtain deasphalted oil and hydrogenation-catalyst-containing deasphalted oil, and sending the liquid components and the deasphalted oil into a fixed bed reactor to realize second hydrogenation reaction, wherein conversion level of the inferior heavy oil and / or the inferior residual oil is not higher than 50% according to conditions of the first hydrogenation reaction. By adoption of the method, poor-property inferior heavy oil and / or the inferior residual oil can be processed, freeness of coking or low coking quantity in the slurry bed reactor and pipelines can be basically guaranteed, and accordingly high lightweight oil product yield can be acquired, and operation cycle of the fixed bed reactor is prolonged.

Description

technical field [0001] The invention relates to a method for processing inferior heavy oil and / or inferior residual oil. Background technique [0002] Crude oil has become heavy and inferior worldwide, and the proportion of residual oil obtained after primary processing of crude oil has increased sharply. In addition, the processing volume of crude oil has increased year by year, and the output of residual oil has risen sharply. At the same time, crude oil reserves are gradually declining, the market demand for light oil products is increasing year by year, and the price difference between light crude oil and heavy crude oil is also increasing. These factors urgently require the development of residual oil / heavy oil light and efficient use of new technologies. [0003] At present, the technologies for lightening residual oil / heavy oil mainly include two processes: decarburization and hydrogenation. In the decarbonization process, the yield of light oil is low and the produc...

AI Technical Summary

Problems solved by technology

However, there are two deficiencies in the fixed bed process: one is poor adaptability to raw materials, when the Ni+V content of the raw materials is greater than or equal to 200 μg / g, trace carbon residue is greater than or equal to 15% by weight, or the content of asphaltene is greater than or equal to 7 It is more difficult to process at weight %; the second is that the operation cycle is short, and the catalyst is deactivated faster due to carbon deposition and metal deposition

This method pursues a higher conversion rate in the slurry bed reactor, so the yield of the light oil product obtained is relatively high, but it also produces a lot of coking and more dry gas at the same time, and the light oil product obtained requires Secondary treatment such as hydrofinishing, resulting in low conversion of residual oil and / or heavy oil in the overall process

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