Heavy hydrocarbon hydrogenation combined process

Abstract

The invention discloses a heavy hydrocarbon hydrogenation combined process which comprises: (a) heavy hydrocarbon raw material and a gas-phase outflow substance from the fixed bed hydrogenation reaction are mixed and enter a boiling bed hydrogenation reactor; (b) the gas-phase outflow substance from the boiling bed hydrogenation reaction in the step (a) is subjected to hydrogen sulfide removal and then used for the fixed bed hydrogenation reaction of the gas-phase outflow substance of the boiling bed hydrogenation reaction in the step (a); and (c) the gas-phase outflow substance of the fixed bed hydrogenation reaction in the step (b) is directly used for the boiling bed hydrogenation reaction process in the step (a), and the liquid-phase outflow substance of the fixed bed hydrogenation reaction in the step (b) is fractionated to obtain a gasoline fraction, a diesel fraction and unconverted tail oil. In the combined process, the boiling bed technique and the fixed bed technique are combined by fully considering the technical characteristics of the boiling bed and the fixed bed as well as the features of the reaction materials, thereby providing a new operation mode which is flexible, efficient and energy-saving; and on the premise of ensuring the smooth operation of the device, the reaction heat is fully utilized, high product quality is provided, and the operational process can be flexibly adjusted according to the requirements of refineries.

Description

technical field

[0001] The invention relates to a combined process method for hydrogenation of heavy hydrocarbons, in particular to a combined process method for hydrogenation of heavy hydrocarbon raw materials such as low-quality heavy oil and residual oil by ebullating bed and fixed bed. 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 focus of the development of the refining industry. . Heavy oil hydrogenation technology is one of the important means of heavy oil upgrading and lightening technology. This technology can not only increase the yield of light oil products, but also improve product quality. Among the heavy oil hydrogenation technologies, the fixed-bed hydrogenation technology is the mos...

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