Hydrogenation process and system for producing catalytically reformed raw material

Abstract

A hydrogenation method and system for producing a catalytically reformed raw material are characterized in that a mixed raw material rich in aromatic hydrocarbon diesel fraction and wax oil fraction is subjected to a hydrofining reaction in a first hydrogenation reaction zone, a reaction product enters a first high-pressure separator, a first liquid-phase material flow obtained through separationenters a second hydrogenation reaction zone, and an obtained product returns to the first high-pressure separator; and the separated first gas phase material flow enters a third hydrogenation reactionzone, the obtained reaction product is separated to obtain a light naphtha fraction, a heavy naphtha fraction and a diesel oil fraction, and the diesel oil fraction is circulated back to the third hydrogenation reaction zone. By adopting the method and the system provided by the invention, wax oil fractions mixed with a large proportion of aromatic hydrocarbon-rich diesel fractions can be processed, the heavy naphtha fractions with high aromatic hydrocarbon latent content can be obtained with high yield and high selectivity, and the heavy naphtha fractions are high-quality raw materials for catalytic reforming.

Description

technical field [0001] The invention relates to a hydrocarbon oil cracking method for obtaining low-boiling fractions in the presence of hydrogen, more specifically, a hydrogenation method and system for producing catalytic reforming raw materials from mixed raw materials. Background technique [0002] With the aggravation of heavy and inferior crude oil, the quality of FCC diesel is deteriorating and the output is increasing year by year. This part of FCC diesel accounts for about one third of my country's commercial diesel. At present, in order to extract more light oil products from crude oil, refineries continue to improve the processing capacity and processing depth of catalytic cracking units, resulting in further deterioration of the quality of catalytic cracking diesel oil, mainly manifested in high content of aromatics, sulfur and nitrogen, etc. High impurity content, low cetane number. At the same time, with the increasingly stringent environmental protection legi...

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Problems solved by technology

[0008] The purpose of the present invention is to provide a hydrogenation method and system for producing catalytic reforming raw materials on the basis of the prior art. Low rate and low potential content of aromatics

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