A kind of multistage series microreactor and fluid mixing method

A microreactor and mixing tank technology, applied in series/parallel reactions, fluid mixers, chemical instruments and methods, etc., can solve problems affecting fluid uniformity and mixing efficiency, reaction conversion rate and production efficiency. It can improve the fluid uniformity, shorten the reaction time, and fast heat and mass transfer.

Active Publication Date: 2022-08-02
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Corning's advanced flow microreactor can better achieve fluid mixing and heat and mass transfer, but due to its special structure, a larger stagnation zone or vortex is formed inside the heart-shaped microgroove at a higher flow rate. spin
As the flow rate increases, the turbulence of the fluid will inevitably form a vortex, but too large a vortex area will lead to a certain degree of back-mixing, which affects the fluid uniformity and mixing efficiency on the one hand, and on the other hand It will also lead to a broadening of its residence time distribution and a reduction in reaction conversion and production efficiency

Method used

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  • A kind of multistage series microreactor and fluid mixing method
  • A kind of multistage series microreactor and fluid mixing method
  • A kind of multistage series microreactor and fluid mixing method

Examples

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Embodiment 1

[0040] The present invention provides a multistage series microreactor, such as figure 1 As shown, the microreactor includes a substrate 1 with a fluid flow channel 10 etched therein, the substrate 1 is provided with a fluid inlet and a fluid outlet 5 communicating with the fluid flow channel 10, and the fluid inlet includes a first A fluid inlet 3 and a second fluid inlet 4 are respectively used for the feeding of the two fluids to be mixed; combined figure 2 and image 3As shown, the fluid flow channel 10 includes a plurality of micro-mixing tanks 2, which are connected by a constricted section 6. The micro-mixing tank 2 is provided with a butterfly-shaped diverter plate 7, which is used to divide and guide the flow. The mixed fluid flowing into the micro-mixing tank 2, several micro-columns 8 are arranged on both sides of the butterfly-shaped dividing plate 7 for further shearing, stretching and folding of the fluid micelles, increasing the contact between the fluids are...

Embodiment 2

[0055] The multi-stage series microreactor described in Example 1 was used to mix water and alcohol at a ratio of 1:1 at different flow rates, and the mean square error of the single-phase concentration distribution at each point on the outlet plane was used as the mixing index M to evaluate the mixing effect. , the closer the mixing index M is to 1, the better the mixing effect is, and vice versa, the worse the mixing effect is. And the advanced flow reactor of Corning company is used as a comparison. The structure diagram of the fluid flow channel of the advanced flow reactor of Corning company is as follows Figure 10 shown.

[0056] The results are shown in the following table as the mixing index M under different flow conditions. Using the microreactor of the present invention in three cascade units, that is, through three series-connected micromixing tanks, a mixing degree of more than 99% can be achieved. The phase mixing capability is comparable to Corning's Advanced ...

Embodiment 3

[0059] The multi-stage series microreactor described in Example 1 was used to mix water and alcohol at a ratio of 1:1 under different flow rates, and the advanced flow reactor of Corning was used as a comparison, and the residence time distribution density function E ( The variance σ of t) 2 and asymmetric s 3 As a reference index of residence time distribution, the smaller the value, the better the fluid distribution performance.

[0060] The results are shown in the following table as the variance σ of the residence time distribution density function E(t) under different flow conditions 2 and asymmetric s 3 As shown, the variance σ of the residence time distribution density function E(t) of the microreactor provided by the present invention 2 Reduced by 12.6% to 56.5%, asymmetric s 3 It is reduced by 19.0% to 50.0%, and the uniform distribution performance of the fluid is better.

[0061]

[0062] According to the analysis results of Corning's advanced flow reactor g...

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Abstract

The invention provides a multi-stage series micro-reactor and a fluid mixing method. The micro-reactor comprises a substrate with a fluid flow channel etched inside, and the substrate is provided with a fluid inlet and an outlet communicated with the fluid flow channel, so The fluid flow channel includes a plurality of micro-mixing tanks connected by constricted sections, a butterfly-shaped distribution plate is arranged in the micro-mixing tank, and several micro-columns are arranged on both sides of the butterfly-shaped distribution plate. The structure and method of the present invention allow the fluid to be mixed to be split through the upper edge of the butterfly split plate, and continuously sheared, stretched and folded through the micro-columns on both sides, and collided and mixed laterally along the bottom wall of the micro-mixing tank. After they are collected again, the unique aerodynamic design of the butterfly-shaped manifold and the micro-column enables the fluid micelles to increase the contact area between the fluids along the flow path, enhance the mass transfer, improve the fluid distribution performance, and enhance the fluid mixing effect, so as to achieve Fast mixing and efficient reaction.

Description

technical field [0001] The invention belongs to the technical field of micro-reactors, and in particular relates to a multi-stage series-connected micro-reactor and a fluid mixing method. Background technique [0002] In the process of chemical production, in order to disperse various components with each other, achieve a certain degree of uniformity, and realize the transmission and chemical reaction between components, it is often necessary to mix them fully. Mixing is a very important unit operation. The mixing effect of each component has an important impact on the conversion rate and yield of the reaction, and is of great significance to production efficiency and product quality. Therefore, the performance of a reactor is related to its mixing efficiency. closely related. [0003] For the homogeneous mixing process, Journal of Microelectromechanical Systems, 2002, 11(5): 462-469. It is proposed that the mean square error of the component concentration on the reactor ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/00B01F33/83B01F25/41B01F33/30
CPCB01J19/0046B01J19/0093B01F25/41B01F33/301B01F33/83B01F33/834B01F33/83612B01F2101/2204
Inventor 杨志荣吕海成张晶钱刚段学志束忠明周兴贵
Owner EAST CHINA UNIV OF SCI & TECH
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