A cold hydrogen box structure and a fixed bed hydrogenation reactor

Abstract

The invention provides a cold hydrogen box structure and a fixed bed hydrogenation reactor, which relate to the technical field of chemical equipment. The structure of the cold hydrogen tank, including the annular hydrogen cooling pipe and the collision mixing plate arranged from top to bottom; the annular hydrogen cold pipe is provided with an inner hydrogen outlet for the inner jet flow in the ring and an outer hydrogen outlet for the outer jet flow in the ring mouth; the collision mixing disc includes a top plate, a bottom plate and a plurality of flow channel plates for connecting the top plate and the bottom plate, the bottom plate is used to be fixed on the inner wall of the reactor, the diameter of the top plate is smaller than the diameter of the bottom plate, and the bottom plate is within the projection range of the top plate A colliding discharge port is provided, and a plurality of flow channel plates surround the colliding discharge port to form a plurality of colliding flow channels, and the width of the discharge end of the colliding flow channel is smaller than the width of the feeding end. Utilizing the unique advantages of the colliding flow in enhancing mass and heat transfer, it can satisfy rapid overall cooling, reduce the axial height of the cold hydrogen tank, and improve the space utilization rate of the reactor.

Description

technical field [0001] The invention relates to the technical field of chemical equipment, in particular to a cold hydrogen box structure and a fixed-bed hydrogenation reactor. Background technique [0002] Against the background of increasingly stringent environmental protection regulations, the standards for impurity content in various petroleum products are also increasing. As an essential technology in the process of clean fuel production, hydrogenation technology plays an important role in refinery production. Hydrogenation technology includes hydrocracking, hydrofining, etc. The hydrogenation reaction is an exothermic reaction. At present, most of the domestic reactors adopt a downflow fixed-bed reactor structure. The reaction materials flow through the catalyst bed from top to bottom, and undergo hydrogenation reaction under its action. As the reaction continues, the released reaction heat makes the temperature of the catalyst bed rise continuously, and the elevated...

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Problems solved by technology

[0004] With the gradual increase of the diameter of the hydrogenation reactor, the design of the traditional box-type cold hydrogen tank often needs to occupy a high reactor height, resulting in a decrease in the space utilization of the reactor and difficulty in the residence time of the stream in the mixing flow channel. ensure

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