Microchannel membrane distillation assembly and device and method of enhancing membrane distillation transfer process with microchannel

A technology of microchannel and membrane distillation, applied in the field of membrane distillation, can solve the problems of limited weakening of polarization phenomenon, complex equipment structure, cumbersome implementation methods, etc., and achieve the effects of easy promotion and use, high membrane flux, and simplified preparation process

Active Publication Date: 2021-02-23
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical measures to weaken the polarization phenomenon in the prior art are usually to increase the degree of turbulence of the fluid, such as increasing the fluid velocity, introducing gas, adding baffles or spacers, etc. Although the resistance of the transmission process can be reduced to a certain extent, the These macro transfer process strengthening methods have very limited weakening of the polarization phenomenon, and lead to a more complex equipment structure, more cumbersome implementation methods, and poor economy

Method used

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  • Microchannel membrane distillation assembly and device and method of enhancing membrane distillation transfer process with microchannel
  • Microchannel membrane distillation assembly and device and method of enhancing membrane distillation transfer process with microchannel
  • Microchannel membrane distillation assembly and device and method of enhancing membrane distillation transfer process with microchannel

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Experimental program
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Effect test

Embodiment 1

[0040] In this embodiment, the microchannel membrane distillation assembly such as figure 1 , figure 2 Shown, by base 11, hydrophobic microporous hollow fiber membrane 6, outer tube 5, insulation layer 7, the first tee 4-1, the second tee 4-2, the first capillary 2-1, the second capillary 2 -2. The first two-way 1-1, the second two-way 1-2, the liquid inlet pipe 3, the liquid outlet pipe 8, the joint 9 and the sealing ring 10 are combined.

[0041] The material of the hydrophobic microporous hollow fiber membrane 6 is polyvinylidene fluoride, the length is 200 mm, the inner diameter is 0.8 mm, the outer diameter is 1.2 mm, the porosity is 0.60, and the average pore diameter of the membrane is 0.1 μm; the outer tube 5 The material is plexiglass, the length is 150 mm, the inner diameter is 1.8 mm, and the outer diameter is 3 mm; the material of the first capillary 2-1 and the second capillary 2-2 is stainless steel, the length is 100 mm, the inner diameter is 0.6 mm, and the o...

Embodiment 2

[0050] In this embodiment, the microchannel membrane distillation device such as image 3 Shown, by feed liquid circulation tank 12, the heating water bath pot 13 that heating feed liquid is used, the first transfer pump 14, electronic balance 16, cold liquid collecting tank 17, conductivity meter 18, the second transfer pump 19, constant temperature water bath pot 20. A computer 21, a first temperature sensor 22, a second temperature sensor 23, a third temperature sensor 24, a fourth temperature sensor 25, and the microchannel membrane distillation assembly 15 with the structure described in Embodiment 1.

[0051] The liquid outlet of the feed-liquid circulation tank 12 is connected with the liquid inlet of the first transfer pump 14 through a pipe fitting, and the liquid outlet of the first transfer pump 14 is connected with the shell-side microchannel of the microchannel membrane distillation assembly 15 through a pipe fitting The liquid inlet is connected, and the shell-si...

Embodiment 3

[0054] In this embodiment, the microchannel membrane distillation device described in Example 2 is used for membrane distillation operation. Both the hot side fluid (feed liquid to be treated) and the cold side fluid are deionized water, and the flow mode is parallel flow. The operation steps are as follows:

[0055] 1. Open the electronic balance 16, the conductivity meter 18, each temperature sensor and the computer 21 in the microchannel membrane distillation device;

[0056] ② Turn on the heating water bath 13 in the microchannel membrane distillation device, set its heating temperature to 70°C required by the hot side fluid, turn on the constant temperature water bath 20 in the microchannel membrane distillation device, and set its constant temperature to cold The required temperature of the side fluid is 20°C;

[0057] ③ heat the hot-side fluid in the feed-liquid circulation tank 12 of the microchannel membrane distillation device to 70°C with the heating water bath (1...

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Abstract

Provided is a microchannel membrane distillation assembly, a first capillary tube inner hole, a hydrophobic microporous hollow fiber membrane inner hole and a second capillary tube inner hole form a tube pass microchannel, and an annular space between the outer wall of the hydrophobic microporous hollow fiber membrane and the inner wall of an outer tube forms a shell pass microchannel. The microchannel membrane distillation device comprises the microchannel membrane distillation assembly, a feed liquid circulating tank, a heating water bath kettle, a first delivery pump, an electronic balance,a cold liquid collecting tank, an electric conductivity meter, a second delivery pump, a constant-temperature water bath kettle, a computer and a temperature sensor. According to the method for strengthening the membrane distillation transfer process by using the microchannel membrane distillation device, the membrane distillation operation is performed by using the microchannel membrane distillation device. Different technical concepts are provided for exploring and developing enhanced membrane distillation transfer process, weakening polarization phenomenon and improving membrane flux.

Description

technical field [0001] The invention belongs to the technical field of membrane distillation, and in particular relates to a membrane distillation component, a membrane distillation device, and a method for strengthening the transfer process of membrane distillation. Background technique [0002] As an emerging membrane separation technology, membrane distillation has been widely used in food processing, seawater desalination, and wastewater treatment. Membrane distillation uses a hydrophobic microporous membrane as the medium. Under the action of the vapor pressure difference on both sides of the membrane, the volatile components in the feed liquid pass through the membrane pores in the form of steam to achieve separation. The membrane distillation component is a membrane distillation technology. Core. [0003] The hollow fiber membrane distillation assembly is a common membrane distillation assembly. The existing hollow fiber membrane distillation assembly is mainly compo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/36B01D63/02B01D65/08
CPCB01D61/364B01D61/366B01D63/028B01D65/08
Inventor 金央魏志桢任永胜李军刘肖陈明贾连玉
Owner SICHUAN UNIV
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