Ultra-large fluidized bed reaction system

By introducing annular jet pipes and optimizing the heat exchange tube bundle structure in the fluidized bed reactor, the problems of fluidization instability and low heat exchange efficiency in the process of scaling up fluidized bed reactors have been solved, and a highly efficient and stable ultra-large fluidized bed reaction system has been realized.

CN122164314APending Publication Date: 2026-06-09JIANGNAN BOILERS & PRESSURE VESSELS ZHANGJIAGANG
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Patent Information

Application Number
CN202610561163.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-27
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Traditional fluidized bed reactors suffer from problems such as unstable fluidization effect, long gas-solid phase residence time, catalyst pulverization and loss, and low heat exchange efficiency during large-scale production, making it difficult to achieve high-efficiency production.

Method used

An annular jet pipe is introduced into the fluidized bed reactor to guide and accelerate the flow by spraying a high-speed annular jet. Combined with the optimized heat exchange tube bundle structure and distributor design, a stable fluidized bed is formed, and material handling is optimized by feed injectors and separators.

Benefits of technology

Stable fluidization of the ultra-large fluidized bed reaction system was achieved, which improved product yield and reaction efficiency, reduced catalyst pulverization and loss, improved heat exchange efficiency, and achieved high-capacity production with low energy consumption.

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Abstract

The ultra-large fluidized bed reaction system provided by the invention comprises a tank body, a distributor and a heat exchange tube bundle, two end parts of the heat exchange tube bundle are respectively connected with the inner wall of the tank body through a hanging bracket, an annular jet flow tube coaxial with the tank body is arranged between the distributor and the heat exchange tube bundle, a circle of jet holes are formed in the top of the jet flow tube, and the bottom of the jet flow tube is communicated with an air supply tube; when the ultra-large type fluidized bed reaction system is used, the ultra-large type fluidized bed reaction system can greatly reduce shielding on mixed fluid, fluidization permeability is improved, meanwhile, the mixed fluid in the tank body is guided and accelerated through high-speed annular jet flow which is jetted by the jet flow pipe and penetrates through the heat exchange tube bundle, and therefore the heat exchange efficiency is improved. Therefore, a stable fluidized bed state is formed, the yield of a target product is improved, catalyst pulverization and loss caused by turbulent flow are reduced, and the ultra-large fluidized bed reaction system can realize the production capacity of 400,000 tons per year under low energy consumption.
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