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Hollow plate ceramic membrane and preparation method thereof

A technology of ceramic membrane and flat membrane, applied in the field of preparation of hollow flat ceramic membrane, can solve problems such as insufficient service life of organic membranes, and achieve the effects of extending service life, high mechanical strength and reducing cleaning times

Inactive Publication Date: 2020-07-17
雅安沃克林环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the present invention also provides a hollow flat ceramic membrane, which can replace the current organic flat membrane, hollow fiber membrane or ordinary ceramic flat membrane. On the one hand, it is resistant to acid and alkali corrosion and high temperature, and can be used in harsh environments. On the other hand, its mechanical strength is high, the flux is large, and it can be backwashed by reverse pressure, which reduces the number of cleaning times of the membrane and improves the service life of the membrane, thereby solving the problem of insufficient service life of the current organic membrane.

Method used

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  • Hollow plate ceramic membrane and preparation method thereof
  • Hollow plate ceramic membrane and preparation method thereof
  • Hollow plate ceramic membrane and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Hollow flat ceramic membrane, its structure is as attached figure 1 As shown, the structure includes a microporous membrane 1 and a supporting body 2 . The microporous membrane 1 and the supporting body 2 are processed from spherical alumina production waste as the main raw material.

[0038] The support body 2 is a hollow thin plate structure with square through-holes. The size of the square holes is 3~5*3~5mm, the wall thickness of the holes is 1.5mm, the porosity is 30~50%, and the pore size distribution is 0.5~5μm.

[0039]The microporous membrane 1 is integrally attached to both sides of the support body 2 after sintering, with a porosity of 50-60% and a pore size distribution of 0.01-0.5 μm.

Embodiment 2

[0041] A method for preparing a hollow flat ceramic membrane, the steps comprising:

[0042] S1. Preparation of support body with spherical alumina: Spherical alumina waste is hydrocyclone sieved to obtain 3-50 μm materials, and shaped by a ball mill. After shaping, the D50 particle size is D1, and the value of D1 is in [5, 20] . D1=3μm in this embodiment;

[0043] The microporous membrane is prepared from spherical alumina: Spherical alumina waste is hydrocyclone sieved to obtain materials with a thickness of 3 to 10 μm, and shaped by a ball mill. After shaping, the D50 particle size is D2, and the value of D2 is in [0.3, 3]. D2=0.3μm in this embodiment;

[0044] S2. Preparation of support body: In parts by weight, the raw materials of support body include 60 parts of ceramic aggregate, 5 parts of 0.5 μm starch, 1 part of methyl cellulose, 1 part of polyethylene glycol, and 10 parts of water. The ceramic aggregate includes The support body uses 78 parts of spherical alumin...

Embodiment 4

[0072] A method for preparing a hollow flat ceramic membrane, the steps comprising:

[0073] S1. Preparation of support body with spherical alumina: air cyclone sieving of spherical alumina waste to obtain 3-50 μm materials, and ball mill shaping. After shaping, the D50 particle size is D1, and the value of D1 is in [5, 20] . In this embodiment, D1=15μm;

[0074] Preparation of microporous membrane with spherical alumina: Spherical alumina waste is screened by air cyclone and hydrocyclone to obtain materials with a thickness of 3-10 μm, and shaped by a ball mill. After shaping, the D50 particle size is D2, and the value of D2 is [0.3 , 3]. D2=3μm in this embodiment;

[0075] S2. Preparation of support body: In parts by weight, the raw materials of support body include 76 parts of ceramic aggregate, 13 parts of 1 μm graphite powder, 8 parts of polyacrylamide, 3 parts of polyethylene glycol, and 16 parts of water. The body uses 91 parts of spherical alumina, 7 parts of magne...

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Abstract

The invention relates to a preparation method of a hollow plate ceramic membrane, which comprises the following steps: preparing spherical aluminum oxide for a support body and spherical aluminum oxide for a microporous membrane; preparing slurry of the support body and the microporous membrane; preparing a support body green body, drying the support body green body, sintering the support body green body, spraying slurry to the support body, and sintering the ceramic membrane. The invention also discloses a hollow plate ceramic membrane, which comprises a support body and a microporous membrane which are integrated. The invention provides a preparation method of a hollow plate ceramic membrane, which converts general industrial wastes into industrial separation products with higher added value and improves the comprehensive utilization rate of spherical alumina production enterprises. The invention also provides a hollow plate ceramic membrane which can replace the existing organic flat-plate membrane, hollow fiber membrane or common ceramic flat-plate membrane, can be used in a harsh environment, has high mechanical strength and large flux, can be backwashed through reverse pressure application, reduces the cleaning frequency of the membrane and prolongs the service life of the membrane.

Description

technical field [0001] The invention relates to a filtration separation membrane element used in water treatment filtration and solid-liquid chemical separation, in particular to a preparation method of a hollow flat ceramic membrane using spherical alumina waste as a raw material. Background technique [0002] In water treatment and solid-liquid chemical membrane separation devices, the separation membrane element plays a major role, which is the core of membrane separation technology. For example, a membrane bioreactor is a sewage treatment device that combines biological treatment and membrane separation technology. In the reaction tank that is originally full of microorganisms, biofilm components are added to make the influent water contact with the microorganisms in the reaction tank and undergo decomposition reactions. At the same time, the mixed liquid is driven by a sufficient pressure difference to pass through the membrane of the biofilm group to produce a filtrati...

Claims

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Application Information

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IPC IPC(8): B01D69/06B01D69/10B01D67/00B01D65/02C02F1/44C04B35/117C04B35/622C04B38/06C04B41/87
CPCB01D69/06B01D69/105B01D69/10B01D67/0041B01D67/0076B01D65/02C02F1/44C04B35/117C04B35/62204C04B38/067C04B38/0645C04B38/068C04B41/87C04B41/5037B01D2323/12B01D2323/22B01D2325/021B01D2325/02B01D2325/04B01D71/025B01D2325/24C04B2235/3206C04B2235/349C04B2235/5436C04B2235/656C04B2235/6567
Inventor 王厦王文川
Owner 雅安沃克林环保科技有限公司
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