Tubular fixed bed reactor

Abstract

The invention discloses a tubular fixed bed reactor. The tubular fixed bed reactor comprises a shell, a tube nest, an upper tube plate, a lower tube plate and a supporting plate, wherein the shell isof a hollow structure; the upper tube plate and the supporting plate are fixed in the shell; the tube nest penetrates through the supporting plate and is arranged between the upper tube plate and thelower tube plate, and the tubular fixed bed reactor is characterized in that the lower tube plate is connected with the upper tube plate through the tube nest, the lower tube plate is not in contact with the inner wall of the shell, and the lower tube plate is connected with the shell through a compensation device. The tubular fixed bed reactor provided by the invention can allow the tubes to freely stretch out and draw back and has a good sealing effect, and meanwhile, the tubular fixed bed reactor provided by the invention is high in heat conduction efficiency, easy in catalyst filling and low in manufacturing cost.

Description

technical field [0001] The invention relates to the field of chemical equipment, in particular to a tube-and-tube fixed-bed reactor. Background technique [0002] In the production of products such as Fischer-Tropsch, methanol, ethylene oxide, and synthetic ammonia, in order to ensure the activity of the catalyst, the reaction temperature is generally controlled between 150 and 350°C. This type of reaction will release a large amount of reaction heat. If the heat generated is not Removing it in time will cause overheating of the catalyst bed, catalyst sintering, rapid increase in pressure drop of the bed, and even overheating of the bed, resulting in scrapping of the catalyst and a serious threat to production safety. The tubular fixed bed reactor is an equipment used to solve the above problems. Its working process is as follows, the raw material gas enters the reactor bed at a certain molar ratio, and reacts to synthesize products under the action of the catalyst. The la...

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Problems solved by technology

[0012] Compared with the prior art, the embodiment of the present invention utilizes the compensation device to completely solve the axial displacement caused by the difference in deformation between the reaction tube and the shell due to the difference in material and / or temperature difference in the tube-and-tube fixed-bed reactor. Stress leads to tube sheet deformation, tube and tube sheet weld pull-off and other damage phenomena, which makes the reactor unable to operate safely for a long time, and fundamentally avoids the problems of existing technologies including seal leakage, difficult processing and manufacturing, and high cost

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