A device packed with radial wall flow structured catalyst

Abstract

The invention discloses a device loaded with a structured catalyst with radial wall flow. According to the invention, a plurality of structural units are loaded in a reaction tube. Each structural unit comprises a reactant stream wall flow guide panel, a structured carrier loaded with a catalyst, and an expansion ring with a thermal expansion and contraction effect. The reactant stream wall flow guide panel is arranged at the top end of the structured carrier loaded with the catalyst. The bottom end of the structured carrier loaded with the catalyst is embedded in the expansion ring with thermal expansion and contraction effect. The reactant stream wall flow guide panel is a solid cylindrical body coaxial with the structured carrier loaded with the catalyst. The expansion ring with thermal expansion and contraction effect is a hollow cylindrical body coaxial with the structured carrier loaded with the catalyst. The cross-sections of two hollow parts are overlapped. The device provided by the invention has the advantages of simple structure, low pressure drop, and uniform fluid distribution. With the device, advantages of the structured catalyst in the aspects of heat transfer and mass transfer can be fully performed. Material stream radial wall flow can be realized. The device can be used in industrialized production for producing propylene from methanol.

Description

technical field [0001] The present invention relates to structured catalysts, and more particularly to a device packed with radial wall flow structured catalysts. Background technique [0002] The tubular fixed-bed reactor has a simple structure and small back-mixing. When the reaction is accompanied by series side reactions, higher selectivity can be obtained. The structure of the tubular reactor can be a single tube or a multi-tube parallel connection; it can be an empty tube, such as a tubular cracking furnace, or a filled tube filled with catalyst for heterogeneous catalytic reactions, such as a column-and-tube fixed bed reactor. The traditional particle-filled tubular reactor has large mass transfer resistance, large pressure drop and multi-channel flow when the fluid passes through the particle-packed bed, and inorganic particles have poor heat transfer performance and are prone to overheating. [0003] In the past few decades, a large number of researchers have devo...

AI Technical Summary

Problems solved by technology

ZSM-5 molecular sieve catalysts are often used in the reaction of methanol to propylene. This reaction is a strong exothermic reaction. The traditional packed bed granular catalyst has poor performance in heat transfer and mass transfer. The heat transfer of the catalyst bed is poor, which is easy to cause local The heat dissipation in the area is too slow and the temperature is too high, forming a hot spot. The deactivation of catalyst carbon deposition and dealumination are accelerated at the hot spot, and the service life is reduced while affecting the stability of product quality.

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