Reactor and method for realizing completely-mixed flow of gas-phase or gas-solid two-phase fluid

Abstract

The invention discloses a reactor for realizing the completely-mixed flow of gas-phase or gas-solid two-phase fluid, which comprises an upper part and a lower part, wherein the upper part is connected with the lower part; the upper part and the lower part both are revolving bodies; the upper and lower revolving bodies have a structure in which the diameters of the sections of the revolving bodiesincrease gradually from the bottoms of the revolving bodies to the connection part of the upper and lower revolving bodies. The lower revolving body of the reactor is provided with at least a gas feeding channel, the top of the reactor is provided with an air outlet, and the gas feeding channel is arranged along the tangential direction of the inner periphery of the lower revolving body of the reactor. The invention also discloses a method for realizing an completely-mixed flow reaction by using the reactor, which comprises the steps of forming a spiral vertex flow first after feeding the gas, then forming an up-and-down vertex flow, and mixing the spiral vertex flow and the up-and-down vertex flow to realize back-mixing. The reactor can realize a gas-phase or gas-solid two-phase reactionby using the structure of the reactor, and has a simple structure, and can make the non-dimensional variance close to 1 by combining with the parameters such as inlet velocity and the like, thereby realizing the complete mixing.

Description

technical field [0001] The invention relates to the technical field of chemical reaction, in particular to a reactor and a method for realizing fully mixed flow of gas phase or gas-solid two-phase fluid. Background technique [0002] The fully mixed flow is an ideal flow, and the degree of backmixing is infinite. In terms of specific quantitative indicators, it is the dimensionless variance σθ 2 is equal to 1. [0003] The fully mixed flow reactor is mainly used in kinetic research, especially in fast reaction kinetic research, and has unique advantages. However, since the fully mixed flow is an ideal flow, it is very difficult to realize it. Over the years, in order to realize fully mixed flow, researchers have done a lot of research work and developed a variety of reactors with different structures, among which the typical ones are basket reactors and loop reactors. [0004] The basket reactor loads the solid catalyst in the high-speed rotating basket, and the gas or li...

AI Technical Summary

Problems solved by technology

For kinetic research in the laboratory, if it is a liquid phase reaction or a liquid-solid phase reaction, it is more convenient to use a circulating reactor, because the liquid can be circulated quantitatively with a pump; and for the usual gas-solid phase reaction, It is difficult to use a circular reactor, because considering the experimental cost, the reactor cannot be made very large, and it is not convenient to use a pneumatic machine for gas circulation.

[0006] The invention patents with the authorized announcement numbers of CN2659539Y, CN2810740Y, CN201046396Y, CN1448211 and the utility model publication with the application number of 95242992.6 all disclose reactors for material mixing, but the reactors disclosed in these patents are all used in reactors. A stirrer or a draft tube and a propeller inside the draft tube are provided to mix the materials. This kind of reactor structure depends on the stirrer or propeller to make the reactants flow, and the structure is complex.

And for the gas-solid phase reaction, if the speed of the agitator or the propeller is low, the speed will drop quickly due to internal loss, and the long-term reaction cannot be realized. If the speed is too high, the solid will be easily broken into debris, and the reaction cannot be realized. And because this kind of reactor needs to be fully enclosed, the rotation of the stirrer or propeller is generally through the magnets arranged inside and outside. The agitator or propeller rotates, it is difficult to achieve high speed of agitator or propeller in this transmission mode

Therefore, the above-mentioned agitator or propeller reactor cannot realize full mixed flow

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