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Anti-pollution modification method of polypropylene hollow fiber membrane module

A fiber membrane and polypropylene technology, applied in the field of anti-pollution modification of polypropylene hollow fiber membrane modules, can solve the problems of difficult control of treatment effect and low modification efficiency, and achieve improved anti-pollution performance, increased efficiency, and easy construction Effect

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Membrane module is the basic unit in the application of membrane engineering, and the anti-fouling membrane modification in the prior art is often limited to the modification of individual membranes, that is, a single flat membrane or a single hollow fiber membrane, the modification efficiency is low, and the treatment effect is not easy control
However, the large-scale anti-pollution performance improvement of the overall membrane module has not been reported before.

Method used

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  • Anti-pollution modification method of polypropylene hollow fiber membrane module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0117] 1) Select a polypropylene hollow fiber membrane with an average inner diameter of 1.2 mm, an outer diameter of 1.8 mm, and a membrane pore size of 0.1 μm, soak it in ethanol for 12 hours, and then wash it with deionized water for 3 times to remove the hollow fibers adsorbed on polypropylene. Impurities on the surface of the fiber membrane are then placed in an oven at 60°C, dried and packaged into a polypropylene hollow fiber membrane module, the module length is 22cm, and the number of filled membrane filaments is 16;

[0118] 2) Connect the packaged polypropylene hollow fiber membrane module 8 to the device used for anti-pollution modification, open the first valve 3 and the second valve 6, and put 50% of the mass percentage of pentadiene in the liquid storage tank 1 The aldehyde cross-linking agent solution is delivered to the polypropylene hollow fiber membrane module 8 with the liquid delivery pump 4 under continuous stirring, and the flow meter 2 and the pressure g...

Embodiment 2

[0124] 1) Select a polypropylene hollow fiber microporous membrane with an average inner diameter of 1.4 mm, an outer diameter of 2.1. Impurities on the surface of the membrane are then placed in an oven at 50°C, dried and packaged into a polypropylene hollow fiber membrane module with a length of 20cm and 15 membrane filaments;

[0125] 2) Connect the packaged propylene hollow fiber membrane module 8 to the device used for anti-pollution modification, open the first valve 3 and the second valve 6, and fill the liquid storage tank 1 with 10% glutaraldehyde The cross-linking agent solution is delivered to the polypropylene hollow fiber membrane module 8 with the liquid delivery pump 4 under continuous stirring, and the flow meter 2 and the pressure gauge 5 are adjusted to control the flow rate of the cross-linking agent solution to be 1ml / min. 7 and confluence valve 9, control the cross-linking agent solution to enter from the axial liquid inlet hole 8-1 of the membrane module,...

Embodiment 3

[0131] 1) Select a polypropylene hollow fiber membrane with an average inner diameter of 1.5mm, an outer diameter of 2.3mm, and a membrane pore diameter of 0.2μm, soak it in ethanol for 8 hours, and then wash it 4 times with deionized water to remove the particles adsorbed on the surface of the membrane. Impurities, then placed in an oven at 80°C, dried and packaged into a polypropylene hollow fiber membrane module, the module length is 23cm, and the number of filled membrane filaments is 17;

[0132] 2) Connect the packaged polypropylene hollow fiber membrane module 8 to the device used for anti-pollution modification, open the first valve 3 and the second valve 6, and put 40% ethylene glycol in the liquid storage tank 1 The aldehyde cross-linking agent solution is delivered to the polypropylene hollow fiber membrane module 8 with the liquid delivery pump 4 under continuous stirring, and the flow meter 2 and the pressure gauge 5 are adjusted to control the flow rate of the cro...

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Abstract

The invention relates to the field of a membrane technology and membrane surface modification and concretely relates to an anti-pollution modification method of a polypropylene hollow fiber membrane module. The method comprises the following steps of selecting a compound with strong hydrophily and multiple active groups as a modifier, adsorbing the modifier by the surface of the polypropylene hollow fiber membrane module in a dynamic cycle way, and under coordination complexation of the active groups in the modifier molecule and an inorganic bacteriostatic agent, fixing the modifier to the polypropylene hollow fiber membrane module so that the polypropylene hollow fiber membrane module with hydrophily and antibacterial properties is prepared. Through control of a flowing direction of a cross-linking agent solution, a modification compound solution and a metal ion soluble salt solution, the method realizes hydrophilic and antibacterial modification of an inner surface, an outer surface and membrane apertures of the polypropylene hollow fiber membrane module, greatly improves work efficiency and treatment effects, needs simple requirement and is suitable for industrial application.

Description

technical field [0001] The invention relates to the field of membrane technology and membrane surface modification, in particular to a method for anti-pollution modification of polypropylene hollow fiber membrane modules. In particular, it refers to a method for hydrophilic and antibacterial modification of polypropylene hollow fiber membrane modules. Background technique [0002] Membrane fouling refers to the adsorption and deposition of particles, colloidal particles or solute macromolecules on the surface of the membrane or in the pores of the membrane due to the physical, chemical or biological interaction between the particles, colloidal particles or solute macromolecules in the material being processed, resulting in Membrane pore size becomes smaller or even directly blocks membrane pores, causing reversible or irreversible changes in flux and separation characteristics of the membrane. One of the main bottlenecks affecting the application of membrane technology is me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/26B01D69/02B01D69/08B01D67/00B01D63/02
Inventor 杨丽魏昕奚振宇王玉杰
Owner CHINA PETROLEUM & CHEM CORP
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