A New Plate Axial Reactor

Abstract

The invention relates to a novel plate-type axial reactor, comprising a reactor shell (5), a pair of heat exchange plates (6), a heat exchange medium distribution main pipe (10), a heat exchange medium distribution branch pipe (11), a heat exchange medium Collection main pipe (3) and heat exchange medium collection branch pipe (4), the reactor shell (5) is provided with reaction material inlet (1), reaction material outlet (8), heat exchange medium inlet (9) and heat exchange The medium outlet (2), the heat exchange plate pair bundle (6) is composed of multiple sub-heat exchange plate pair bundles, and one end of each sub-heat exchange plate pair bundle passes through the heat exchange medium distribution branch pipe (11) and the corresponding heat exchanger The heat medium distribution main pipe (10) is connected to the heat exchange medium inlet (9), and the other end is connected to the heat exchange medium outlet (2) through the heat exchange medium collection branch pipe (4) and the corresponding heat exchange medium collection main pipe (3). Compared with the prior art, the invention has the advantages of small volume, convenient catalyst loading and unloading, flexible structure, and multi-stage reaction.

Description

Technical field [0001] The invention relates to an axial reactor, in particular to a novel plate type axial reactor. Background technique [0002] For industrial production, most reactions require catalyst participation. The catalyst is generally solid. The reaction involves multiple phases, including gas-solid phase, liquid-solid phase, and gas-liquid-solid phase. Fixed bed, fluidized bed, and moving bed can be used. And slurry bed and other types of reactors. Among them, the fixed bed reactor is the most common and simplest reactor form. The process of chemical reaction is often accompanied by exothermic or endothermic phenomena. In order to keep the reaction temperature within a reasonable range, direct or indirect heat exchange is usually adopted. The direct heat exchange will reduce the processing capacity of reaction materials and give subsequent products. Separation and precision manufacturing becomes a burden, so indirect heat exchange methods are more common. The use ...

AI Technical Summary

Problems solved by technology

In most cases, because there are tube sheets at both ends, it is inconvenient to load the catalyst outside the tube, and it is relatively simple to load the catalyst inside the tube; the heat exchange medium usually goes through the shell side, because the shell side baffle can enhance the fluid turbulence effect, It is beneficial to improve the heat transfer coefficient, but if the tube is used, the heat transfer effect is poor due to the straight tube and smooth wall, and the boundary layer is laminar flow.

[0003] For ion exchange resin solid acid-base catalysts commonly used in reactions such as etherification and ether bond cleavage reactions, hydration reactions, esterification reactions, condensation and cyclization reactions, the polymer skeleton will swell in many reaction media, and if it is loaded In the tube, due to the limited space in the tube, it will cause serious blockage in the tube, the pressure drop will rise suddenly, and even cause the deformation of the tube wall, posing a safety hazard; if it is filled outside the tube, the heat exchange medium will go inside the tube, the heat transfer coefficient will be low If the heat is not timely, the performance of the reaction product and the activity of the catalyst will be affected, so this type of reaction is not suitable for shell and tube reactors

[0004] For some gas-liquid-solid reactions, the gas and liquid are fed separately and mixed after feeding. Due to the limited mixing time and space, the material is not uniform when it enters the catalyst bed. If a tubular reactor is used, the uneven material will be fined immediately. Divided into thousands of small units, each tube reacts differently, which seriously affects product performance

[0005] In the tube-and-tube fixed-bed reactor, because the heat transfer coefficient of the tubes is not high, more heat transfer area is required, and due to limiting factors such as the center-to-center distance of the tubes, the volume of the reactor is relatively large; the catalyst is packed in the tubes, usually one There are tens of thousands of tubes in the reactor, the workload of catalyst loading and unloading is large, and the leak detection and maintenance are relatively complicated; when increasing the output of a single equipment, the tube-and-tube reactor often faces large pressure drop, high hot spot temperature and volume Too big and other problems

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