A kind of liquid phase hydrogenation reactor and hydrogenation method

Abstract

The invention discloses a liquid-phase hydrogenation reactor and a hydrogenation method. The liquid-phase hydrogenation reactor includes an inner cylinder and a reactor shell, the inner cylinder is conical, an annular cavity is formed between the inner cylinder and the reactor shell, and the cross-sectional area of ​​the annular cavity gradually increases from bottom to top; the top of the inner cylinder is The upper head is connected to the raw material inlet of the top of the reactor, and the bottom of the inner cylinder is communicated with the bottom of the annular cavity; the middle of the reactor is horizontally arranged with a ceramic membrane nano / micron component, and the ceramic membrane nano / micron component is connected to external hydrogen; the inner cylinder is filled with Hydrogenation catalyst I, the annular cavity is filled with hydrogenation catalyst II, the activity of hydrogenation catalyst I is lower than that of hydrogenation catalyst II; the flow mode of the material in the inner cylinder is from top to bottom; the flow mode of the material in the annular cavity For bottom up. The method of the invention can effectively control the initial activity of the liquid phase hydrogenation reaction and improve the conversion rate in the later stage of the reaction through the internal structure of the reactor, the material flow mode and the catalyst gradation.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, in particular to a liquid-phase hydrogenation reactor and a hydrogenation method. Background technique [0002] Liquid-phase hydrogenation technology is a new type of hydrogenation technology. Hydrogen is dissolved in feedstock oil in advance, and the hydrogen required for hydrogenation is met by a large number of liquid-phase circulations, which overcomes the hydrogen diffusion in conventional trickle bed hydrogenation. Due to the influence of mass transfer, the hydrogenation reaction is carried out in the kinetic control zone. Therefore, compared with the traditional fixed-bed gas / liquid / solid three-phase hydrogenation process, the liquid-phase hydrogenation process has the advantages of fast hydrogenation reaction rate, high reaction High efficiency, low energy consumption, low investment and many other advantages have been widely recognized and applied. Liquid-phase hydrogenation reacto...

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Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the present invention provides a liquid-phase hydrogenation reactor and a hydrogenation method, through the internal structure of the reactor, the material flow mode and the catalyst gradation method, the initial activity of the catalyst in the early stage of the hydrogenation reaction can be effectively controlled, and the reaction rate can be improved. The reaction conversion rate in the later stage solves the problem of severe heat release in the early stage of the reaction and the reaction product inhibits the reaction conversion rate in the later stage of the reaction, and at the same time achieves a higher hydrogenation reaction rate and reaction conversion rate in the early stage of the reaction and in the later stage of the reaction

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