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Ceramic membrane tube support and preparation method thereof

A technology of ceramic membrane tubes and supports, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of large liquid permeation resistance and long distance of liquid passing through the support, so as to reduce the permeation resistance , Improve the efficiency of permeation and separation, and reduce the effect of cracking

Active Publication Date: 2014-09-24
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The present invention aims at the characteristics of the multi-channel structure ceramic membrane tube and the problem that the distance of the liquid passing through the support body is long and the liquid permeation resistance is relatively large during use, and proposes to increase the filtrate chamber and the water outlet channel inside the ceramic membrane tube to reduce the liquid permeation path s solution

Method used

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  • Ceramic membrane tube support and preparation method thereof
  • Ceramic membrane tube support and preparation method thereof
  • Ceramic membrane tube support and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Chitosan (degree of deacetylation 84%, 10wt%), acetic acid (formulated into a 0.8vol% solution, 89.5wt%), glutaraldehyde (formulated into a 25wt% solution, 0.5wt%) were stirred on a magnetic stirrer 4h and mix evenly to prepare a premix.

[0041] Mullite (40μm, 80wt%), starch (10wt%), methyl cellulose (molecular weight 50000, 10wt%) were dry ball milled for 4h and mixed evenly, and then the premix was added (the volume ratio of the mixed powder to the premix was 1 : 4), polyethylene glycol 4000 (0.5wt%) ball milled for 4h to make evenly dispersed mud. Then the mud is put into the mud mixer, and N, N, N'N'-tetramethylethylenediamine (0.1wt%) and hydrogen peroxide (10wt%) are added successively, and the relative vacuum is at 95%. The material is refined 6 times. The molding process of the porous ceramic membrane support body can be extrusion molding. The extrusion temperature is 10° C., the extrusion speed is 0.2 m / min, and the extrusion pressure is 6 MPa. Its length ...

Embodiment 2

[0043] Stir acrylamide (14.5wt%), tert-butanol (prepared as a 0.8vol% solution, 85wt%), N,N'-methylenebisacrylamide (0.5wt%) on a magnetic stirrer for 12h and mix uniformly into a premix.

[0044] ZrO 2 (10 μm, 88wt%), graphite powder (5wt%), polyvinyl alcohol (molecular weight is 220,000, 5wt%) dry ball milling 6h mixes evenly, then adds premix (the volume ratio of mixed powder and premix is ​​1: 1 ), BYK163 (1wt%) ball milled for 8h to make evenly dispersed mud. Then put the mud into the mud mixer, add N, N, N'N'-tetramethylethylenediamine (0.1wt%) and ammonium persulfate (8wt%) successively, and the relative vacuum is at 80%. The material is refined twice. The molding process of the porous ceramic membrane support body can be extrusion molding. The extrusion temperature is 50° C., the extrusion speed is 2 m / min, and the extrusion pressure is 6 MPa. Its length is 1m, diameter is 142mm, there are 800 channels inside, the diameter of the channel is 5mm, and the wall thick...

Embodiment 3

[0046] Acrylic acid (10wt%), distilled water (89wt%), and calcium iodate (1wt%) were stirred on a magnetic stirrer for 12 hours and mixed uniformly to prepare a premix.

[0047] Will Al 2 o 3 (5 μm, 91wt%), starch (3wt%), polyacrylamide (molecular weight 12 million, 6wt%) dry ball milling 8h and mix evenly, then add the premix (the volume ratio of the mixed powder and the premix is ​​1:3), Polyethyleneimine (PEI) (0.5wt%) was ball-milled for 6 hours to prepare a uniformly dispersed slurry. Then the slurry is put into the mud mixer, and N, N, N'N'-tetramethylethylenediamine (0.5wt%) and potassium persulfate (12wt%) are added successively, and the relative vacuum is at 90%. The material is refined 4 times. The molding process of the porous ceramic membrane support body can be extrusion molding. The extrusion temperature is 30° C., the extrusion speed is 1 m / min, and the extrusion pressure is 8 MPa. Its length is 1m, diameter is 142mm, there are 800 channels inside, the diam...

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Abstract

The invention relates to a ceramic membrane tube support and a preparation method thereof and belongs to the technical field of ceramic materials. The ceramic membrane tube support and the preparation method thereof are characterized in that the ceramic membrane tube support comprises a plurality of channels and at least one filtrate chamber, at least one water discharging channel is included in the support and penetrates through the whole support axially or is evenly distributed on the support axially, the angle formed by the at least one water discharging channel and the axial direction of the support is 90 degrees, the angle formed by the at least one water discharging channel and the at least one filtrate chamber is 0-90 degrees, the filtrate chambers corresponding to the at least one water discharging channel on the upper surface and the lower surface of the ceramic membrane tube are plugged and sealed by utilizing high polymer materials or rubber materials or plugged by slurry for producing the support, and finally integrated with the ceramic membrane tube through drying and sintering. The prepared ceramic membrane tube is large in surface area and multi-channel, the defect of large filtration resistance of filtrate in the ceramic membrane tube is overcome, and separation and permeability efficiencies are improved. According to the ceramic membrane tube support and the preparation method thereof, the preparation technology is simple, the production cost is low, and the ceramic membrane tube support can be widely applied to the water treatment field or other liquid filtering processes.

Description

technical field [0001] The invention relates to a ceramic membrane tube with large size, high surface area and multi-channel structure and a preparation method thereof. The structure can effectively reduce the resistance of filtrate flow and increase the membrane flux. Background technique [0002] Due to the advantages of excellent high separation efficiency, high temperature resistance, solvent resistance, anti-microbial, acid and alkali resistance, high mechanical strength, easy cleaning and regeneration, porous inorganic ceramic membranes have been applied in food, beverage, plant (drug) It can be used for separation, clarification, purification, concentration, sterilization, desalination, etc. in the process. It is mainly composed of a support, an intermediate layer and a separation layer. According to the pore size of the separation layer, it is divided into three types: microfiltration, ultrafiltration and nanofiltration. [0003] The key to porous inorganic ceramic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/10B01D71/02
Inventor 汪长安刘瑞平黄勇衷待群王迎奎付磊王迎祥
Owner TSINGHUA UNIV
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