Method for improving stable annular flow mass transfer rate in microchannel

A micro-channel and ring-shaped technology, applied in separation methods, chemical instruments and methods, liquid solution solvent extraction, etc., to achieve the effect of increasing the contact interface area, eliminating the phase separation process, and reducing the time required for mass transfer

Active Publication Date: 2019-04-30
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, experiments have shown that the mass transfer rate of the formed stable annular flow needs to be further improved

Method used

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  • Method for improving stable annular flow mass transfer rate in microchannel
  • Method for improving stable annular flow mass transfer rate in microchannel
  • Method for improving stable annular flow mass transfer rate in microchannel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] According to this embodiment figure 1 Arranging microchannels and setting linear central inserts in the microchannels, said microchannels include an outer tube 5 and a first inner tube 3-1 and a second inner tube 3-2 combined with the two ends of the outer tube respectively, the first inner tube The center lines of the tube and the second inner tube coincide with the center line of the outer tube. The outer tube 5 is a transparent quartz capillary tube with an outer diameter of 3 mm, an inner diameter of 0.9 mm, and a length of 150 mm. The first inner tube 3-1 and the second inner tube 3 -2 has an outer diameter of 0.7mm and an inner diameter of 0.5mm, and is made of 316L stainless steel. The joint between the first inner tube 3-1 and the left end of the outer tube and the joint between the second inner tube 3-2 and the right end of the outer tube Avoid liquid leakage through sealing; the linear center insert 4 with regular changes in outline is figure 2 The twist-sha...

Embodiment 2

[0046] According to this embodiment figure 1 Arranging microchannels and setting linear central inserts in the microchannels, said microchannels include an outer tube 5 and a first inner tube 3-1 and a second inner tube 3-2 combined with the two ends of the outer tube respectively, the first inner tube The centerlines of the tube and the second inner tube coincide with the centerline of the outer tube. The outer tube 5 is a transparent quartz capillary tube with an outer diameter of 3 mm, an inner diameter of 0.9 mm, and a length of 200 mm. The first inner tube 3-1 and the second inner tube 3 -2 has an outer diameter of 0.7mm and an inner diameter of 0.5mm, and is made of 316L stainless steel. The joint between the first inner tube 3-1 and the left end of the outer tube and the joint between the second inner tube 3-2 and the right end of the outer tube Avoid liquid leakage through sealing; the linear center insert 4 with regular changes in outline is figure 2 The twist-shape...

Embodiment 3

[0055] According to this embodiment figure 1 Arranging microchannels and setting linear central inserts in the microchannels, said microchannels include an outer tube 5 and a first inner tube 3-1 and a second inner tube 3-2 combined with the two ends of the outer tube respectively, the first inner tube The centerlines of the tube and the second inner tube coincide with the centerline of the outer tube, the outer tube 5 is a transparent polymethyl methacrylate tube with an outer diameter of 3mm, an inner diameter of 0.9mm, and a length of 300mm, and the first inner tube 3-1 and The outer diameter of the second inner tube 3-2 is 0.7mm, and the inner diameter is 0.5mm, and both are made of 316L stainless steel. The connection at the right end of the outer tube is sealed to avoid liquid leakage; the linear center insert 4 with regular changes in outline is Figure 5 The helical linear central insert shown is made of titanium wire with a maximum radial dimension of 0.2mm. The line...

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Abstract

Provided is a method for improving the stable annular flow mass transfer rate in a microchannel; a linear central insert part with regular change of appearance outline is arranged in the microchannel.During operation, fluid forming an outer ring is fed into the microchannel at a certain flow rate firstly; after the microchannel is full of the fluid forming the outer ring, fluid forming an inner ring is fed into the microchannel at a certain flow rate, and two fluids flow by a stable annular flow pattern with regular deformation in the microchannel for mass transfer; the flow rate of the fluidforming the inner ring is controlled to be 0.8-20 mL / min, and the ratio of the flow rate of the fluid forming the inner ring to the flow rate of the fluid forming the outer ring is 1:(0.2-20); when the fluid forming the outer ring is a water phase and the fluid forming the inner ring is an organic phase, the linear central insert part is made of an oleophylic material, and an outer tube is made of a hydrophilic material; when the fluid forming the outer ring is an organic phase and the fluid forming the inner ring is a water phase, the linear central insert part is made of a hydrophilic material and the outer tube is made of an oleophylic material.

Description

technical field [0001] The invention belongs to the technical field of chemical process intensification, and in particular relates to a method for increasing the rate of stable annular mass transfer in a microchannel. Background technique [0002] Microchemical technology is widely used in liquid-liquid extraction. When liquid-liquid extraction is carried out in a microchannel, due to the microscale effect of the microchannel, the mass transfer distance between the two phases is greatly shortened, and the interface area between the two phases is greatly increased. To complete a certain extraction and separation task, the extraction time required is greatly shortened. Compared with traditional extraction operations, liquid-liquid extraction in microchannels has higher mass transfer rates. [0003] The liquid-liquid two-phase flow pattern in the microchannel will significantly affect the extraction rate and the phase separation of the fluid at the outlet of the device. There...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D11/04
CPCB01D11/0496
Inventor 金央焦辉燕李军李维陈明钟燕郑志远王紫涵
Owner SICHUAN UNIV
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