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Fully-dispersing passive-type multistage focusing micromixer, and mixing method and application thereof

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

Active Publication Date: 2017-03-01
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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-dispersing passive-type multistage focusing micromixer, and mixing method and application thereof
  • Fully-dispersing passive-type multistage focusing micromixer, and mixing method and application thereof
  • Fully-dispersing passive-type multistage focusing micromixer, and mixing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] like Figure 1 to Figure 7 The fully dispersed two-stage focusing micro-mixer shown includes No. 1 plate to No. 5 plate, and the corresponding No. 4 plate is an eight-channel system, and No. 1 plate is provided with a first feed hole 1.1 and a discharge hole 1.2; 2 Channels 2.1 to 2.4 and flow holes 2.5 to 2.8 are opened on the No. plate; flow holes 3.1 to 3.4, outlet flow holes 3.5, and discharge channels 3.6 are opened on the No. 3 plate; scattered channels 4.1 to 4.8 are opened on the No. 4 plate to circulate Holes 4.9 to 4.12; channels 5.1 to 5.4 are opened on the side adjacent to No. 5 plate and No. 4 plate, and the second feeding hole 5.5 is opened on the other side of No. 5 plate; No. 1 plate to No. 5 plates are closely attached to each other The channels 5.1 to 5.4 are aligned with the channels 4.5 to 4.8, the channels 2.1 to 2.4 are aligned with the channels 4.1 to 4.4, the flow holes 2.5 to 2.8 are aligned with the flow holes 3.1 to 3.4, the flow holes 1.2 are...

Embodiment 2

[0051] The difference from Example 1 is that the No. 4 board of the core component adopts a sixteen-channel three-stage focusing method, such as Figure 8 As shown, the number of dispersed channels in the No. 4 plate is 16 channels, and the channel width at the widest part is 1.8 mm, and the channel width at the narrowest part is 0.4 mm. The number of channels from the primary mixing zone to the secondary mixing zone is changed from eight channels to four channels, and the channel width is 0.4mm. The depth of all the channels used in the No. 4 board is 0.5 mm, and the corresponding channels on the No. 2 and No. 5 boards are all eight channels.

Embodiment 3

[0053] The difference from Example 1 is that the No. 4 board of the core component adopts a 32-channel four-stage focusing method, such as Figure 9 As shown, the number of dispersed channels in the No. 4 plate is thirty-two channels, and the corresponding channel width at the widest part is 1.5 mm, and the channel width at the narrowest part is 0.3 mm. The number of channels from the primary mixing zone to the tertiary mixing zone changes from sixteen channels to eight channels and then to four channels, and the channel width is 0.3mm. All channels used in board #4 have a depth of 0.3 mm. The corresponding channels on No. 2 board and No. 5 board are all sixteen channels.

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Abstract

The invention provides a fully-dispersing passive-type multistage focusing micromixer. The fully-dispersing passive-type multistage focusing micromixer comprises plates No.1 to No.5; the number of multiple stages is n which is more than or equal to 2; the plate No.4 is correspondingly provided with dispersing channels with a number of 2n + 1; the plate No.2 and the plate No.5 are respectively provided with channels with a number of 2n; the plate No.1 is provided with first feeding holes and discharge holes; the plate No.2 is also provided with circulation holes with a number of 2n and circulation holes A; the plate No.3 is also provided with circulation holes with a number of 2n, circulation outlet holes and discharge channels; the plate No.4 is also provided with circulation holes with a number of 2n; the plates No.1 to No.5 are fixedly connected by mutually fitting closely; mixing zones with a multistage number of n are arranged at the central position of the plate No.4, wherein each stage is composed of a plurality of wedge-shaped obstacles; the number of the wedge-shaped obstacles of a first-stage mixing zone is 2n + 1; the number of the wedge-shaped obstacles is stage-by-stage reduced to the mixing zone of n - 1; and when a fluid flows through every stage of the mixing zones, the fluid can generate horizontal laminar shear action due to the presence of the wedge-shaped obstacles, and a chaotic phenomenon is generated in the obstacle zones, so the process of mixing is strengthened.

Description

technical field [0001] The invention relates to the field of microchemical technology in terms of microfluid mixing, in particular to a fully dispersed passive multistage focusing micromixer and a mixing method and application thereof. Background technique [0002] In microchannels, due to the characteristics of microchannels, the flow of fluid in microchannels generally belongs to laminar flow at low Reynolds numbers, and the mixing of microfluids is mainly achieved through intermolecular diffusion. For example, under certain conditions, for 100μm The required diffusion time is as high as 5s, which makes the mixing have a significant impact on the system. Therefore, it is necessary to introduce a micro-mixer into the microchemical system. [0003] According to the presence or absence of external energy drive, micro-mixers can be divided into passive micro-mixers and active micro-mixers. Compared with active micro-mixers, the structure of passive micro-mixers is relatively s...

Claims

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Application Information

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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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