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Hollow fiber ceramic membrane production method

A ceramic membrane and fiber technology is applied in the field of preparation of in-situ composite carbon-toughened YSZ hollow fiber ceramic membranes, which can solve the problems of unsatisfactory fracture toughness, high production cost, complicated and tedious processes, and achieves good adsorption effect and avoids high temperature. Sintering, the effect of reducing production costs

Inactive Publication Date: 2015-07-22
HAIMEN SENDA DECORATION MATERIAL CO LTD +1
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  • Application Information

AI Technical Summary

Problems solved by technology

However, although ceramics have high mechanical strength, their fracture toughness is not ideal.
Brittle fractures are extremely prone to occur during assembly or installation. Therefore, it is very important to propose an in-situ composite carbon toughening; Chinese patent (1769217) uses the principle of anion-yang membrane electrodialysis to remove chloride ions when removing chloride ions. The process is complicated. Complicated, although it can effectively remove chloride ions, but the production cost is relatively high

Method used

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  • Hollow fiber ceramic membrane production method
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  • Hollow fiber ceramic membrane production method

Examples

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Effect test

Embodiment 1

[0021] Select 3YSZ and test the cross-flow filtration effect of the hollow fiber ceramic membrane module prepared by the preparation method proposed by the present invention, add unfiltered raw water into the membrane module, and conduct Escherichia coli on the water permeated from the outer wall of the membrane module. The removal rate, chloride ion removal rate, and lead ion removal rate were analyzed and tested, and the removal rate of Escherichia coli was >99.99%; the removal rate of residual chloride ion in water was >99.9%, and the removal rate of lead ion was >99.9%.

Embodiment 2

[0023] Select 3YSZ and carry out external flame and external combustion treatment on the hollow fiber ceramic membrane module prepared by the preparation method proposed by the present invention to prepare a hollow fiber membrane with a C / YSZ double-layer structure ratio of 1:1, and detect its porosity and water flow, it is found that the open porosity can reach 46.8%, and the water flow is 4.18m 3 / (m 2 .h.bar).

Embodiment 3

[0025] Select 5YSZ and test the cross-flow filtration effect of the hollow fiber ceramic membrane module prepared by the preparation method proposed by the present invention, add unfiltered raw water into the membrane module, and conduct Escherichia coli on the water permeated from the outer wall of the membrane module. The removal rate, chloride ion removal rate, and lead ion removal rate were analyzed and tested, and the removal rate of Escherichia coli was >99.00%; the removal rate of residual chloride ion in water was >99.0%, and the removal rate of lead ion was >99.0%.

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Abstract

A hollow fiber ceramic membrane production method comprises the following steps: adding polyethersulfone particles into an n-methyl-2-pyrrolidone solution, dissolving to form a polymer solution, adding polyvinylpyrrolidone, and uniformly mixing; slowly adding Fe2O3 and YSZ mixed powder, fully stirring, and preparing a spinning solution; pouring the spinning solution into a stainless steel container, and carrying out vacuum deaeration at room temperature for 2h to remove bubbles dissolved in the stirring process; and spinning by adopting an air gap technology, extruding the spinning solution from a spinning nozzle into an external coagulant aid tap water at a speed of 20-30mm / s under a nitrogen pressure of 0.1MPa under an air gap of 150-300mm, and standing the above obtained hollow fiber ceramic membrane precursor in tap water for 14-34h.

Description

1. Technical field [0001] The invention relates to a preparation method of an in-situ composite carbon toughened YSZ hollow fiber ceramic membrane. The ceramic membrane can be used to prepare industrial ultrapure water and has good adsorption effect on chloride ions. 2. Background technology [0002] Ceramic membrane has the characteristics of high mechanical strength, high temperature resistance, corrosion resistance, easy cleaning, and difficult deformation of membrane pores. It is widely used in food, pharmaceutical, petroleum, seawater desalination, wastewater treatment, gas separation and other fields. In terms of shape, the filling density of the hollow fiber membrane is 10 times that of the traditional ceramic membrane flat membrane tubular membrane, up to 6000m 2 / m 3 , the separation efficiency is extremely high. However, although ceramics have high mechanical strength, their fracture toughness is not ideal. Brittle fractures are extremely prone to occur during a...

Claims

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Application Information

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IPC IPC(8): B01D71/02B01D69/08B01D67/00C04B35/80C02F1/44C02F1/28C02F1/58C02F103/04
Inventor 郭芳威蔡黄越赵晓峰洪亮桑志宏
Owner HAIMEN SENDA DECORATION MATERIAL CO LTD
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