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Diatomite-based low-cost ecological environment-friendly type flat ceramic membrane and preparation method thereof

A low-cost, ceramic membrane technology, applied in chemical instruments and methods, membranes, membrane technology, etc., can solve the problems of poor mechanical strength of filter membranes, frequent fouling of components, and inability to acid and alkali cleaning. Industrial prospects, the effect of low prices

Active Publication Date: 2016-03-23
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

The core component of the membrane bioreactor is the separation membrane. At present, the separation membrane is roughly divided into hollow fiber membrane, organic flat membrane and ceramic flat membrane according to the material. The mechanical strength of the hollow fiber membrane and the organic flat membrane is poor, It is prone to broken wires, frequent fouling of components, not resistant to oxidation, acid and alkali cleaning, short service life, and the diaphragm must be replaced after damage, regeneration and high operating costs. Ceramic flat membrane has high strength and long service life. , anti-oxidation, pollution-free, easy to clean, easy to install, small filtration resistance, good performance, etc., in recent years, it has been paid more and more attention at home and abroad
[0003] At present, the ceramic flat membrane mainly uses alumina and aluminum hydroxide as the main materials, which has high production cost and only has a separation function. In the utility model patent CN204724031U and the invention patent CN104828929A, the appearance design of the ceramic flat membrane combines the four corners of the flat Designed as a right angle, it is easy to be bumped and damaged during use, and the strength is not high

Method used

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  • Diatomite-based low-cost ecological environment-friendly type flat ceramic membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Preparation of ceramic flat membrane support

[0027] Take 500-mesh food-grade diatomaceous earth through a 100-mesh sieve and remove the upper layer of hydraulic sedimentation and dry the resulting powder 50Kg, add CMC3Kg, starch 3Kg, zeolite 2.5Kg, D50 0.5 micron alumina powder 1Kg, mix in the double cone Mix the material in the feeder for 30 minutes, take 3.2Kg of hot water and add 3Kg of PEG1Kg tung oil, stir and disperse evenly, add 7.28Kg of nano titanium dioxide dispersion with 30% solid content and 3.35Kg of nano silica sol with 30% solid content, stir After 4 hours, add it to the mixed powder in the kneader in the form of spray, knead the mud, extrude and shape, dry and sinter at 1100 degrees, keep for 4 hours to obtain diatomaceous earth with an average pore size of 1.2 microns and a porosity of 43.3% Ceramic flat membrane support.

[0028] (2) Preparation of separation membrane

[0029] Prepare 10Kg of spherical alumina suspension with a median particle size o...

Embodiment 2

[0031] (1) Preparation of ceramic flat membrane support

[0032] Take 325-mesh food-grade diatomaceous earth through a 100-mesh sieve and remove the upper layer of hydraulic sedimentation and dry 50Kg. Add HPMC4Kg, starch 5Kg, zeolite 1.5Kg, D50 is 1 micron alumina powder 1.5Kg, in the double cone Mix the materials in the mixer for 30 minutes, take 2.5Kg of hot water and add 3Kg of PEG3Kg tung oil, stir and disperse evenly, add 3.35Kg of nano-titania dispersion with 30% solid content and 8.3Kg of nano-silica sol with 30% solid content. After stirring for 4 hours, add it to the powder mixed in the kneader in the form of spray. figure 1 The shape is extruded, dried and sintered at 1250 degrees, and kept for 4 hours to obtain a diatomite ceramic flat membrane support with an average pore diameter of 3.36 microns and a porosity of 49.5%.

[0033] (2) Preparation of separation membrane

[0034] Prepare 10Kg of spherical alumina suspension with a median particle size of 0.6 microns with a...

Embodiment 3

[0036] (1) Preparation of ceramic flat membrane support

[0037] Take 200-mesh food-grade diatomaceous earth through a 100-mesh sieve and remove the upper layer of hydraulic sedimentation and dry 50Kg. Add HPMC2Kg, PVA3Kg, starch 6Kg, zeolite 10Kg, D50 is 1 micron alumina powder 4Kg, in the double cone Mix the materials in the mixer for 30 minutes, take 1Kg of hot water and add 1.5Kg of PEG3Kg tung oil, stir and disperse evenly, add 5.5Kg of nanometer titanium dioxide dispersion with a solid content of 30% and 8.3Kg of nanosilica sol with a solid content of 30%. After stirring for 4 hours, add it to the powder mixed in the kneader in the form of spray. figure 1 The shape is extruded, dried and sintered at 1300 degrees, and kept for 4 hours to obtain a diatomite ceramic flat membrane support with an average pore diameter of 5.5 microns and a porosity of 51.4%.

[0038] (2) Preparation of separation membrane

[0039] Prepare 10Kg of spherical alumina suspension with a median particle ...

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Abstract

The invention discloses a diatomite-based low-cost ecological environment-friendly type flat ceramic membrane. The diatomite-based low-cost ecological environment-friendly type flat ceramic membrane comprises a ceramic flat support body and a separating layer membrane coated an outer surface of the ceramic flat support body, the water outlet holes are arranged in the ceramic flat support body; an integral body of the ceramic flat support body is a flat plate, and each corner angle of the flat plate is designed as round corner. The invention also provides a preparation method of the diatomite-based low-cost ecological environment-friendly type flat ceramic membrane, which comprises the steps of preparation of a ceramic flat membrane support body and preparation of a separating flat ceramic membrane. The raw materials have the advantages of low cost and no toxicity, the ceramic membrane is the ecological environment-friendly type filter membrane, is easily decomposed after being discard, and secondary pollution on environment cannot be generated. The ceramic membrane has wide utilization scope, can be used for water processing and gas processing, and especially used for processing and purifying harmful gas due to indoor decoration and processing outdoor environment gas PM2.5.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and water treatment, and in particular relates to a diatomite-based low-cost, eco-friendly flat ceramic membrane and a preparation method thereof. Background technique [0002] Membrane bioreactor, as a new type of high-efficiency sewage treatment technology, has become an indispensable treatment technology in the treatment of urban sewage, industrial wastewater and even difficult wastewater. The core component of the membrane bioreactor is the separation membrane. At present, the separation membrane is roughly divided into hollow fiber membrane, organic flat membrane and ceramic flat membrane according to the material. The mechanical strength of the hollow fiber membrane and the organic flat membrane is poor, It is prone to broken wires, frequent fouling of components, not resistant to oxidation, acid and alkali cleaning, short service life, and the diaphragm must be replaced aft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D69/06B01D69/10B01D67/00
CPCB01D67/0046B01D69/06B01D69/10B01D71/027B01D71/028B01D2323/12B01D2323/20
Inventor 郭涛黄智锋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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