Preparation method of high-flux and high-precision ceramic ultrafiltration membrane for oil removal and iron removal of high-temperature condensed water

A technology of high-temperature condensed water and ceramic ultrafiltration membranes, applied in chemical instruments and methods, membranes, membrane technology, etc., can solve the problems of easy cracking of the membrane layer, high production cost, complicated process, etc., and achieve enhanced membrane strength and flexibility The effects of high stability, enhanced binding performance, and high separation precision

Active Publication Date: 2016-05-11
安徽名创新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

④The operating period of the membrane is long, up to 6-12 months
At present, inorganic ceramic membranes generally use porous alumina of 95 or 99 porcelain as the carrier, which contains oxides such as silicon oxide. The carrier of the silicon system contained in it will dissolve during use in a high temperature system, which will affect the silicon content of the condensed water after treatment. , the iron [Fe or Fe(OH), Fe(OH) contained in the high-temperature condensed water is an insoluble substance with a particle size of 80-100nm. To meet the requirement of iron removal, the pore size of the ceramic membrane separation layer will be below 50 nanometers. The separation accuracy of the ceramic membrane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Use 100Kg of spherical alumina powder (purity ≥ 99.6%) with a median particle size of 25 microns, add 8Kg of starch, 4Kg of titanium oxide, 2Kg of alumina with D50=2 microns, and 8Kg of PVA in a mixer. Dissolve 2Kg of PEG and 3Kg of glycerin in 8Kg of heated water and spray it into the kneader. After adding, continue to add cold water until a suitable mud material is obtained. After kneading, the green body is obtained by smelting and extrusion molding, and then dried and dried. After sintering, a porous alumina support is obtained.

[0024] 2) Prepare 1.3Kg each of alumina sol and zirconia sol with a solid content of 15wt%, and mix and stir them for 4 hours. Add 1Kg of spherical alumina powder with a median particle size of 0.5 microns to 6.7Kg of water to form a suspension solution, disperse it ultrasonically for 1 hour, add 2% PEG of the suspension solution mass, 0.03% ceramic slurry defoamer DF-804, stir and add The prepared mixture of alumina sol and zirconia s...

Embodiment 2

[0027]1) Use 100Kg of spherical alumina powder (purity ≥ 99.6%) with a median particle size of 15 microns, add 7Kg of starch, 2Kg of alumina with a median particle size of 1 micron, and 0.75Kg of alumina with a median particle size of 1 micron Zirconium, 6Kg of MC are mixed in a mixer, 3Kg of PEG and 3Kg of glycerin are dissolved in 8KG of hot water, sprayed into the kneader and kneaded together with the mixed material, after the hot water is sprayed, continue to add Appropriate amount of cold water is kneaded to produce mud material, and the green body is obtained by kneading mud and extruding, and then dried and sintered to obtain a porous alumina support body.

[0028] 2) Prepare 1.3Kg each of alumina sol and zirconia sol with a solid content of 15wt%. The two were mixed and stirred for 4 hours. Add 1Kg of spherical alumina powder with a median particle size of 0.3 microns to 6.7Kg of water to make a suspension solution, disperse it ultrasonically for 1 hour, add 5% PEG of...

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PUM

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Abstract

The invention discloses a preparation method of a high-flux and high-precision ceramic ultrafiltration membrane for oil removal and iron removal of high-temperature condensed water. The method comprises the following steps: 1) preparation of a silicon-free porous alumina supporting body: 2) preparation of a transition layer membrane: and 3) preparation of a separation layer membrane. The prepared high-flux and high-precision ceramic ultrafiltration membrane for the high-temperature condensed water adopts the silicon-free system porous alumina supporting body, so in the process of using, no silicon is dissolved to cause secondary pollution of the condensed water after treatment; the prepared high-flux and high-precision ceramic ultrafiltration membrane for the high-temperature condensed water has high separation accuracy, the membrane average pore size is 5-50 nm, the membrane flux is high, the water yield is greater than 1.5 m<3>/m<2>*h, the oil content of the high-temperature condensed water after treatment is less than or equal to 0.3 mg/L, and the iron content of the high-temperature condensed water after treatment is less than or equal to 20 [mu]g/L; the bending strength is greater than 8000 N, and the membrane thermal stability is greater than 800 DEG C.

Description

technical field [0001] The invention relates to the field of preparation technology and application of porous ceramic membranes, in particular to a preparation method of a ceramic ultrafiltration membrane for removing oil and iron from high-temperature condensed water. Background technique [0002] At present, superheated steam is widely used as thermal power and heat source in chemical industry, thermal power and other industries. After power consumption and heat exchange, superheated steam turns into condensed water, and its temperature is between 50-99 degrees. If it is not polluted, steam condensed water It is close to pure distilled water, but due to pipe corrosion, material leakage, poor management and other reasons, the steam condensate water of most enterprises has certain pollutants such as oily substances, iron, etc., so it cannot directly enter the boiler for recycling, resulting in the large Most of the high-temperature condensate in most enterprises is dischar...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D69/02B01D69/10B01D71/02C02F1/44
CPCB01D67/0041B01D67/0046B01D69/02B01D69/10B01D71/024B01D71/025B01D2325/24B01D2325/30B01D2325/32C02F1/444
Inventor 黄智锋郭涛刘伶俐徐海棠刘芳芳
Owner 安徽名创新材料科技有限公司
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