Liquid-phase hydrogenation reactor and hydrogenation process

Abstract

The invention relates to a liquid-phase hydrogenation reactor and a hydrogenation process, the liquid-phase hydrogenation reactor comprises an inner cylinder and a reactor shell, the inner cylinder is conical, the top and the bottom of the inner cylinder are open, the edge of the bottom of the inner cylinder is hermetically connected with the inner wall of the reactor, and a plurality of small holes are formed in the wall of the inner cylinder; a ceramic membrane tube bundle is vertically arranged in the axial direction 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 higher than that of the hydrogenation catalyst II; the reactor raw material inlet communicates with the top of the inner cylinder; the materials flow in the inner cylinder from top to bottom; the materials flow in the annular cavity from top to bottom. According to the method, the contact time of the material and the catalyst in the whole hydrogenation reaction process can be effectively controlled, so that the temperature rise of a catalyst bed layer is more uniform, the problems of severe heat release and reaction conversion rate inhibition in the reaction process are solved, and higher hydrogenation reaction rate and conversion rate in the whole liquid-phase hydrogenation reaction process are achieved.

Description

technical field

[0001] The invention belongs to the fields of chemical industry and petrochemical industry, and specifically relates to a liquid-phase hydrogenation reactor and a hydrogenation process. 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 advanta...

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