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Multi-channel kaolin plate ceramic membrane support, preparation method and application thereof

A ceramic membrane support and kaolin technology, applied in the field of ceramic membranes, can solve the problems of easy cracking during sintering, harmful to the health of production personnel, and low production efficiency, and achieve easy process control, wide application range and high porosity. Effect

Active Publication Date: 2016-01-13
SANDA FILM SCI & TECH XIAMEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of process is complex in operation, low in production efficiency, easy to crack when sintered at the bonding point, and low in yield, and the organic solvents and adhesives in the production process will cause great pollution to the environment and are harmful to the health of production personnel.

Method used

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  • Multi-channel kaolin plate ceramic membrane support, preparation method and application thereof
  • Multi-channel kaolin plate ceramic membrane support, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) In terms of parts by mass, 95 parts of kaolin ceramic aggregate with an average particle size of 180 μm, 1 part of pore-forming agent activated carbon powder with a particle size of 20 μm, 1 part of dispersant polyvinyl alcohol (PVA) powder with a molecular weight of 2000 and After mixing 3 parts of gelatin powder, a gel injection molding binder with a purity of 98%, ball milling for 2 to 4 hours to obtain a mixed powder, add RO water at a volume ratio of 2.2:1 between the mixed powder and RO water, and heat in a water bath to 85°C, ball milling for 20 hours to obtain slurry;

[0034] 2) Maintain the temperature of the slurry at 80°C. After vacuum defoaming, immediately inject the slurry into a flat film forming mold, and form it in situ at 20°C to obtain a wet billet; a number of tubular or rod-like molds extending through the channels of the opposing side walls;

[0035] 3) Demould the above-mentioned wet blank, dry in the shade at room temperature for 24 hours, d...

Embodiment 2

[0040] 1) In terms of parts by mass, 80 parts of kaolin ceramic aggregate with an average particle size of 1 μm, 5 parts of pore-forming agent starch with a particle size of 1 μm, 5 parts of dispersant polyethylene glycol (PEG) powder with a molecular weight of 1000 and After 10 parts of gel injection molding binder agar powder with a purity of 98% were mixed, ball milled for 4 hours to obtain a mixed powder, and the volume ratio of the mixed powder to RO water was 1.5:1 by adding RO water, and heated in a water bath to 45 °C, ball milled for 18 hours to obtain slurry;

[0041] 2) Maintain the temperature of the slurry at 45°C. After vacuum defoaming, immediately inject the slurry into a flat film forming mold, and form it in situ at 15°C to obtain a wet billet; a number of tubular or rod-like molds extending through the channels of the opposing side walls;

[0042] 3) Demould the above-mentioned wet blank, dry in the shade at room temperature for 72 hours, dry at 60°C for 12...

Embodiment 3

[0047] 1) In terms of parts by mass, 90 parts of kaolin ceramic aggregate with an average particle size of 100 μm, 3 parts of pore-forming agent activated carbon powder with a particle size of 10 μm, and 2 parts of dispersant methyl cellulose (MC) powder with a molecular weight of 2800 After mixing with 5 parts of gel injection molding binder agarose powder with a purity of 98%, ball milling for 3 hours to obtain a mixed powder, add RO water at a ratio of 1.8:1 by volume of the mixed powder and RO water, and heat in a water bath to 75°C, ball milling for 12 hours to obtain slurry;

[0048] 2) Maintain the temperature of the slurry at 75°C. After vacuum defoaming, immediately inject the slurry into a flat film forming mold, and form it in situ at 25°C to obtain a wet billet; a number of tubular or rod-like molds extending through the channels of the opposing side walls;

[0049] 3) Demould the above-mentioned wet blank, dry in the shade at room temperature for 48 hours, dry at...

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Abstract

The invention discloses a multi-channel kaolin plate ceramic membrane support, a preparation method and an application thereof. The preparation method includes the following steps: 1) mixing a kaolin ceramic aggregate, a pore forming agent, a dispersing agent and a gel-casting adhesive, ball-milling the mixture, adding RO water, heating the mixture to 40-85 DEG C and ball-milling the mixture for 4-20 h to obtain slurry; 2) maintaining the temperature of the slurry to be 40-85 DEG C, vacuum-defoaming the slurry, injecting the slurry into a moulding die, and performing in-situ moulding at 0-40 DEG C to obtain a wet blank; 3) demoulding the wet blank, shade-drying the wet blank at room temperature, drying the wet blank at 40-100 DEG C, and sintering the blank in air at 1000-1500 DEG C for 1-4 h with temperature maintained to obtain the multi-channel kaolin plate ceramic membrane support. The preparation method is carried out through the gel-casting process so that the method is wide in available range, is low in cost and is easy to control in processes. The blank body is high in strength, is low in organic substance content, can be sintered directly and is good in performance uniformity. The multi-channel kaolin plate ceramic membrane support has high total porosity and filtering flux, and is toxic-free and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of ceramic membranes, and in particular relates to a multi-channel kaolin flat ceramic membrane support body, a preparation method and application thereof, which can be used to replace organic flat membranes or hollow fiber membranes currently commonly used in membrane bioreactors. Background technique [0002] Organic membranes used in membrane bioreactors suffer from low mechanical, chemical, and thermal stability, which limits their application in harsh systems. Compared with organic membranes, in addition to effective interception, inorganic ceramic flat membranes also have the advantages of high temperature resistance, solvent resistance, acid and alkali corrosion resistance, high mechanical strength, long life, high separation efficiency, easy cleaning and regeneration, etc. Realize deep purification of sewage, deep phosphorus and nitrogen removal. Due to the excellent performance of the inorganic cer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B38/08
Inventor 丘助国翁志龙洪昱斌蓝伟光
Owner SANDA FILM SCI & TECH XIAMEN
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