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Low thermal conductivity membrane and producing method thereof and membrane distillation apparatus

A technology of thin film distillation and low thermal conductivity, which is applied in evaporation, separation methods, rayon manufacturing, etc., can solve the problems of flux attenuation, low film flux, increased equipment investment cost and energy consumption, and reduce temperature polarization , Improve the effect of characteristic heat preservation value

Active Publication Date: 2015-07-01
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Thin film distillation still needs to overcome the problem of low film flux in water recovery and reuse, and temperature polarization is an important factor causing flux attenuation
At present, in the thin film distillation system, the temperature polarization phenomenon caused by heat transfer loss is improved by increasing the crossflow speed and module design, but at the same time it will increase equipment investment costs and energy consumption.

Method used

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  • Low thermal conductivity membrane and producing method thereof and membrane distillation apparatus
  • Low thermal conductivity membrane and producing method thereof and membrane distillation apparatus
  • Low thermal conductivity membrane and producing method thereof and membrane distillation apparatus

Examples

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Effect test

preparation example Construction

[0036] In the preparation of modifying the mesoporous particle to make it hydrophobic, the hydrophobic group can be grafted to the surface of the mesoporous particle and the inner surface of the hole by copolymerization or grafting, wherein the hydrophobic group can be C 1 -C 10 Alkyl, vinyl, propenyl, or phenyl.

[0037] The preparation method of the copolymerization method includes: dispersing a precursor with a hydrophobic group in a solution containing a surfactant to carry out a self-assembly reaction, wherein the precursors can be of multiple types, but at least one of the precursors has a hydrophobic group; and removing the surfactant to obtain modified mesoporous particles grafted with the hydrophobic group on the surface and inner surface of the hole.

[0038] For example, the functionalization of mesoporous particles and the introduction of hydrophobic functional groups such as vinyl groups can be carried out by copolymerization chemical reactions, such as tetraetho...

Embodiment 1

[0062] will end with -CH 2 =CH 2 Multiple mesoporous particles modified by chemical functional groups were introduced into the electrospinning solution prepared with polyvinyldifluoride-hexafluoropropylene (PVDF-co-HFP) as raw material and dimethylformamide (Dimethylformamide, DMF) as solvent , adding 1 wt% of modified mesoporous particles, and then preparing a low thermal conductivity film by electrospinning technology.

Embodiment 2 to 4

[0064] Examples 2 to 4 are based on the steps of Example 1, respectively adding 10wt%, 20wt%, and 50wt% of modified mesoporous particles, and then preparing a low thermal conductivity film by electrospinning technology.

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Abstract

A low thermal conductivity membrane and a producing method thereof and a membrane distillation apparatus having the membrane. The method comprises: (1) providing a modified and by a plurality of hydrophobic pores in the particles; and (2) the plurality of through holes modified particles are mixed in solution with a polymer solution to obtain electro-spinning and (3) the electrical electrostatic spinning solution was spun to give the low thermal film. The present invention also provides a low thermal film and thin film distillation apparatus having the film. The present invention is by electro-spinning solution was modified in the hydrophobic particles introduced into the hole configuration, electrostatic spinning technology to produce thin film distillation of low thermal nano-fiber separation membrane, can reduce the temperature of the polarization phenomenon, and is improved in characteristic insulation values.

Description

technical field [0001] The invention relates to the technical field of thin film distillation, in particular to a thin film with low thermal conductivity, its preparation method and a thin film distillation device with the thin film. Background technique [0002] Thin film distillation still needs to overcome the problem of low film flux in terms of water recovery and reuse, and temperature polarization is an important factor causing flux attenuation. At present, for the temperature polarization phenomenon caused by heat transfer loss in the thin film distillation system, the polarization is improved by increasing the crossflow speed and module design, but at the same time it will increase equipment investment costs and energy consumption. . [0003] Therefore, in order to improve the influence of temperature polarization on the system, it is necessary to develop other methods to solve this problem and improve the competitiveness of thin film distillation technology. Cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D1/22B32B27/02B32B27/18D01F6/48D01F1/10
Inventor 黄盟舜何佳桦苏育央洪仁阳梁德明杨翠容
Owner IND TECH RES INST