Process of hydrogenation of heavy oil feedstock

Abstract

The invention discloses a process of hydrogenation of heavy oil feedstock, especially the process of hydrogenation of heavy oil feedstock using combination of boiling bed and fixed bed technologies. The process comprises the following steps: mixing heavy oil feedstock and the product obtained from the fixed bed hydrogenation; adding the mixture into boiling bed hydrogenation reactor, separating the materials obtained from boiling bed hydrogenation into to hydrogen-rich gas and liquid; recycling the hydrogen-rich gas; loading the liquid into the fractionate tower and for fractioning to obtain lightweight product and tail oil; mixing the tail oil and hydrogen, and adding the mixture into the fixed bed hydrogenation reactor; and adding all the materials obtained from fixed bed hydrogenation into the boiling bed hydrogenation reactor. Compared with existing technology, the method of the invention effectively combines the boiling bed and the fixed bed hydrogenation technology characteristics, allows the product obtained from fixed bed hydrogenation directly to enter the boiling bed reactor, thereby improves the flow state of the boiling bed feed, and enhances heat and mass transfer effects among gas, liquid and solid. Simultaneously, product properties are obviously improved after the tail oil obtained from the boiling bed hydrogenation is hydrogenated by the fixed bed. Employing the operation mode of the heavy oil hydrogenation can improve the product quality significantly and increase yield of the light oil obviously.

Description

technical field [0001] The invention relates to a process method for hydrogenation conversion of heavy oil raw materials, in particular to a combined process method for producing light fuels from low-quality heavy and residual oil raw materials with high content of metal, residual carbon and asphaltene through fluidized bed and fixed bed hydrogenation treatment. Background technique [0002] With the vigorous development of heavy crude oil and the changes in the demand structure of petroleum products worldwide, the market demand for light fuel oil continues to grow rapidly, and the demand for heavy fuel oil decreases rapidly. The deep processing technology of heavy oil has become the development of the refining industry. focus. Hydrogenation technology is an important means of lightening heavy oil. It can remove most of the heteroatoms such as sulfur, nitrogen and metals while achieving a higher yield of light oil, and meet the increasingly stringent environmental protection...

AI Technical Summary

Problems solved by technology

The combined process is only based on the liquid feed requirements of different devices for the joint use of devices, without specific combination of the characteristics of various processes, try to maximize the advantages of each process

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