Continuous catalytic reforming and dehydrogenating reactor

Abstract

The present invention discloses a reaction method applicable to continuous catalytic reformation and its reaction equipment. Said method adopts a circular pressure container with catalytic bed as raction equipment, the gas inlet and gas outlet are positioned on same end of said reaction equipment, said catalytic bed is formed from external porous wall and circular internal porous wall cylinder in which the catalytic is filled. Said catalyst can be continuously flowed from top to bottom by means of gravity, at the same time the reaction material can be flowed from top to bottom in distributary channel and can be flowed from bottom to top in the collecting channel, and can implement inverted U-type radial centrifugal flow from interior to exterior in the reaction equipment.

Description

technical field [0001] The invention relates to a reactor suitable for gas-solid phase catalytic reforming, paraffin catalytic dehydrogenation and catalytic dehydrogenation of substituted aromatic hydrocarbons. Background technique [0002] In the existing reaction methods for catalytic reforming, paraffin catalytic dehydrogenation and alkylaromatics catalytic dehydrogenation, gas-solid phase moving bed radial catalytic reactors are generally used. The gas-solid moving bed radial reactor is generally composed of an upper head, a cylindrical side wall and a bottom head to form the outer shell of the reactor. In the reactor, there is a cylindrical outer porous cylinder and a cylindrical outer shell. The annular space formed by the inner porous cylinder forms a cylindrical catalyst bed after the catalyst is loaded. The cylindrical inner porous cylinder can prevent catalyst particles from entering the inner space of the inner porous cylinder, and at the same time it can be used...

AI Technical Summary

Problems solved by technology

The main disadvantage of this design is that it does not solve the fundamental problem of the occurrence of the above-mentioned "cavity" and "wall-attached" phenomena, and the reactor has a complex structure and is difficult to install and manufacture.

In the Chinese patent CN1258558A, the reactant material inlet is opened on the side of the reactor shell, and the vertical height of the reactant inlet is located in the middle of the axial height of the catalytic reaction zone. The reactant flows radially through the catalytic bed layer from outside to inside, and then enters the central gas collecting pipe. , and then flow out from the bottom of the reactor, so it is difficult to maintain the uniform distribution of the reactant flow along the axial direction, and it is easy to cause the phenomenon of "sticking to the wall"

In Chinese patent CN1127159A, the catalytic bed is divided by setting an intermediate wall in the catalyst bed in order to reduce the possibility of the catalyst sticking to the wall, but this method does not solve the fundamental problem of the catalyst sticking to the wall, but leads to a complex reactor structure

[0006] In summary, most of the various radial moving bed reactors adopt the centripetal flow mode of the reaction material from the outside to the inside along the radial direction, the radial gas presents an acceleration trend, and the reforming reaction is a process of increasing volume , therefore, in order to avoid "sticking to the wall", it brings great restrictions and difficulties to the design of the moving bed radial reactor

At the same time, the centripetal flow from the outside to the inside of the existing patented technology will inevitably cause the axial temperature difference of the catalytic bed due to the heat loss of the imported material in the outer split flow channel.

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