Fully dispersed passive multi-stage focusing micro-mixer and its mixing method and application

A micro-mixer and passive technology, which is applied in the field of micro-chemical industry, can solve the problems of high processing precision and processing technology, complex processing of the mixer, and poor mixing effect, so as to improve the mixing effect, reduce the pressure drop, and promote the mixing. Effect

Active Publication Date: 2019-03-01
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the existing micro-mixer such as long mixing time, poor mixing effect, complex processing of the mixer, and high requirements for processing accuracy and processing technology, the present invention proposes a fully dispersed passive multi-stage focusing micro-mixer, which provides A hybrid approach and application

Method used

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  • Fully dispersed passive multi-stage focusing micro-mixer and its mixing method and application
  • Fully dispersed passive multi-stage focusing micro-mixer and its mixing method and application
  • Fully dispersed passive multi-stage focusing micro-mixer and its mixing method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Such as Figure 1 to Figure 7 The fully dispersed secondary focusing micromixer shown includes No. 1 to No. 5 plates. The corresponding No. 4 plate is an eight-channel system. The No. 1 plate is provided with a first feed hole 1.1 and a discharge hole 1.2; 2 There are channels 2.1 to 2.4 and circulation holes 2.5 to 2.8 on the No. 3 board; there are circulation holes 3.1 to 3.4, outlet circulation holes 3.5, and a discharge channel 3.6 on the No. 3 board; dispersing channels 4.1 to 4.8 are opened on the No. 4 board. Holes 4.9 to 4.12; channels 5.1 to 5.4 are opened on the adjacent side of No. 5 plate and No. 4 plate, and a second feed hole 5.5 is opened on the other side of No. 5 plate; No. 1 to No. 5 plates are closely attached to each other The channels 5.1 to 5.4 and the channels 4.5 to 4.8 are aligned with each other, the channels 2.1 to 2.4 are aligned with the channels 4.1 to 4.4, the circulation holes 2.5 to 2.8 are aligned with the circulation holes 3.1 to 3.4, a...

Embodiment 2

[0051] The difference from Example 1 is that the core component No. 4 board adopts a sixteen-channel three-stage focusing method, such as Picture 8 As shown, the number of dispersion channels in the No. 4 plate is sixteen channels, the width of the channel at the widest point is 1.8 mm, and the channel width at the narrowest point is 0.4 mm. The number of channels from the first mixing zone to the second mixing zone is changed from eight channels to four channels, and the channel width is 0.4mm. The depth of all channels adopted by the 4th board is 0.5mm, and the corresponding channels on the 2nd and 5th boards are all eight channels.

Embodiment 3

[0053] The difference from Example 1 is that the core component No. 4 board adopts a 32-channel four-level focusing method, such as Picture 9 As shown, the number of dispersing channels in the No. 4 plate is thirty-two channels, and the corresponding channel width at the widest point is 1.5 mm, and the channel width at the narrowest point is 0.3 mm. The number of channels from the first mixing zone to the third mixing zone changes from sixteen channels to eight channels to four channels, and the channel width is 0.3mm. The depth of all channels used by the No. 4 board is 0.3mm. The corresponding channels on board 2 and board 5 are all sixteen channels.

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Abstract

The present invention provides a fully dispersed passive multi-stage focusing micro-mixer, including No. 1 plate to No. 5 plate, assuming that the number of multi-stages is n, n≥2, and the corresponding No. 4 plate is provided with 2 n+1 dispersive channels, No. 2 and No. 5 boards are equipped with 2 n channels; the No. 1 plate is provided with the first feed hole and the discharge hole; the No. 2 plate is also provided with 2 n A flow hole and a flow hole A; No. 3 board also has 2 n A flow hole, an outlet flow hole, and a discharge channel; there are also 2 on the No. 4 board n The No. 1 plate to No. 5 plate are tightly fitted and fixedly connected to each other; the center of the No. 4 plate contains n-level mixing zones, wherein each level is composed of a plurality of wedge-shaped obstacles, and the first The number of wedge-shaped obstacles in the mixed zone is 2 n+1 The number of wedge-shaped obstacles is halved step by step to the n-1 mixing zone. When the fluid flows through each level of mixing zone, due to the existence of wedge-shaped obstacles, the fluid will produce a transverse laminar shearing effect, so that in The obstacle zone creates chaos, which intensifies the mixing process.

Description

Technical field [0001] The invention relates to the technical field of micro-chemicals in the aspect of microfluid mixing, in particular to a fully dispersed passive multistage focusing micromixer and its mixing method and application. Background technique [0002] In the microchannel, due to the characteristics of the microchannel, the fluid flow in the microchannel generally belongs to the laminar flow at low Reynolds number, and the mixing of the microfluid is mainly realized by the diffusion between molecules. For example, under certain conditions, for 100μm The diffusion distance required is as high as 5s, which makes the influence of mixing on the system significant. Therefore, it is necessary to introduce a micromixer in the microchemical system. [0003] Micromixers can be divided into passive micromixers and active micromixers according to whether they are driven by external energy. Compared with active micromixers, passive micromixers are relatively simple in structure an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F13/00
Inventor 陈光文周峰张博宇董正亚张宇超
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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