Centrifugal compressor for butene oxidative dehydrogenation device

Abstract

Provided is a centrifugal compressor for a butene oxidative dehydrogenation device. The centrifugal compressor comprises a main shaft, impellers, baffles, a coupler, a reflux device, a curved channel,a diffuser, an upper casing, a lower casing, sealing assemblies and bearings. The centrifugal compressor is characterized in that (1), a casing of the compressor is divided into upper and lower bodies from the horizontal plane of a rotating shaft, the upper casing is fixed to the lower casing through sealing bodies at both ends, and the lower casing is fixed on a supporting base; (2), parts suchas the multi-stage back-bend closed impellers with same diameters, spacer sleeves, balance discs and the like are connected in series and mounted on the main shaft to cooperatively constitute rotors,and the rotors are placed on the lower casing through the bearings and bearing seats; (3), the curvature radius of the curved channel is increased; (4), a structure in which the inlet width of the reflux device is smaller than the outlet width of the diffuser is adopted. The centrifugal compressor ensures the uniform distribution of fluid and achieves the requirement of low pressure drop, and is particularly suitable for the butene oxidative dehydrogenation process.

Description

technical field [0001] The invention belongs to the technical field of special centrifugal compressors, and in particular relates to a centrifugal compressor for a butadiene device for oxidative dehydrogenation of butene. Background technique [0002] Butadiene is an important monomer of synthetic rubber and synthetic resin, and is also a raw material for various coatings and organic chemicals. [0003] Oxidative dehydrogenation of butene is an important synthetic method for producing butadiene. Its reaction principle is that in the presence of a large amount of water vapor, butene and oxygen undergo dehydrogenation reaction under the action of a catalyst to generate butadiene and water. The butene oxidative dehydrogenation reactors currently used in industry usually adopt the form of fixed bed reactors. Although it has the advantages of high conversion rate, good selectivity, and less oxygen-containing by-products, it has very high requirements on the uniformity of gas flo...

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Problems solved by technology

[0004] Due to the above requirements of the user for the process, we searched the website of the State Intellectual Property Office, although there are Chinese patent 201410012454.0 "A п-type butene oxidative dehydrogenation fixed-bed radial reactor" and Chinese patent 201410012467.8 "A Z-type butene Oxidative dehydrogenation fixed bed radial reactor", but they only put forward the requirements for the flow mode of the reaction gas in the reactor, and did not discuss the structure of the compressor

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