A spiral plate fixed bed reactor for gas-solid phase contact catalytic reaction

Abstract

The invention relates to a spiral plate fixed bed reactor for gas-solid phase contact catalytic reaction, comprising inlets and outlets of a gas phase and a heat exchange medium. The reactor has a plurality of spiral plate fixed bed reaction sections inside. Each spiral plate fixed bed reaction section consists of two spiral passages formed by rolling two parallel metal sheets, wherein one of thepassages has two axial ends which are not sealed, and is filled with a catalyst to form a fixed bed layer, with the upper end (or lower end) of the bed layer being communicated with the gas inlet, andthe lower end (or the upper end) being communicated with the gas outlet; gas enters the reactor through the inlet, passes through the catalyst fixed bed layers axially section by section and is reacted and then is discharged from the gas outlet; the other passage has sealed axial two ends and is adopted as a heat exchange medium passage; the heat exchange medium flows through the spiral passage and exchanges heat through the plate wall, and is discharged out of the reactor though the heat exchange medium outlet after heat exchange is finished. The reactor has a significantly increased shell-side heat exchange coefficient, so that the total heat transfer coefficient is increased, the heat transfer effect is enhanced, and the heat transfer temperature difference is reduced.

Description

technical field [0001] The invention relates to a fixed bed reactor, in particular to a spiral plate fixed bed reactor for gas-solid contact catalytic reaction. Background technique [0002] Fixed bed catalytic reactors are widely used in chemical industry and petroleum industry. [0003] The advantages of fixed-bed reactors are: ① small back-mixing, effective contact between fluid and solid catalyst, high selectivity can be obtained when accompanied by side reactions; ② small mechanical loss of catalyst; ③ simple structure. But there are the following disadvantages: ①The heat transfer effect is poor, especially for strong exothermic reactions, it is prone to runaway (the reaction temperature is out of control, rises sharply, exceeding the allowable range); ②The catalyst cannot be replaced during operation, and the catalyst needs to be frequently regenerated The reaction is generally not suitable for use. [0004] In industrial production, for the strong exothermic reactio...

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Problems solved by technology

[0007] In order to solve the technical problems of the existing shell-side fixed-bed reactor with small heat transfer coefficient, low space utilization rate of the catalyst bed, and difficulty in enlarging the device, especially in order to reduce the circulation volume of the heat exchange medium, the spiral plate exchange The structure and performance characteristics of the heater, the invention provides a spiral-plate fixed-bed reactor for gas-solid phase contact catalytic reaction

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