Liquid-phase hydrogenation reactor and hydrogenation method thereof

Abstract

The invention discloses a liquid phase hydrogenation reactor and a hydrogenation method thereof. The liquid phase hydrogenation reactor comprises 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 section area of the annular cavity is gradually increased from bottom to top; the top of the inner cylinder penetrates through a upper seal head and is communicated with a material inlet at top of the reactor; a ceramic membrane nano / micron assembly is horizontally arranged in the middle of the reactor and is communicated with external hydrogen; the inner cylinder is filled with a hydrogenation catalyst I, the annular cavity is filled with a hydrogenation catalyst II, and the activity of the hydrogenation catalyst I is lower than that of the hydrogenation catalyst II; the material flows in the inner barrel from top to bottom; and the material flows in the annular cavity from bottom to top. According to the method, the initial activity of the liquid phase hydrogenation reaction can be effectively controlled through the internal structure of the reactor, the material flow mode and catalyst grading, and the later conversion rate of the reaction is increased.

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, which is to dissolve hydrogen in the raw material oil in advance, and to meet the hydrogenation required by the hydrogenation reaction through a large amount of liquid phase circulation, which overcomes the hydrogen diffusion in the conventional trickle bed hydrogenation reaction 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 a fast hydrogenation reaction rate and a high reaction rate. High efficiency, low energy consumption, low investment and many other advantages have been widely recognized and...

AI Technical Summary

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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