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Composite ceramic membrane, preparation method and application thereof

A composite ceramic membrane and ceramic technology, applied in the field of filter membrane, can solve the problems of difficult control of inorganic ceramic membrane pore size, high cost, easy clogging, etc., and achieve the effect of stable filtration effect, stable structure and performance, and mild conditions

Inactive Publication Date: 2019-09-03
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and provide a composite ceramic membrane and its preparation method to solve the technical problems of the existing inorganic ceramic membranes, which are difficult to control the pore size, fast attenuation, easy to block, and high cost.

Method used

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  • Composite ceramic membrane, preparation method and application thereof
  • Composite ceramic membrane, preparation method and application thereof
  • Composite ceramic membrane, preparation method and application thereof

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preparation example Construction

[0031] On the other hand, on the basis of the composite ceramic membrane described above, the embodiment of the present invention also provides a preparation method of the composite ceramic membrane. combine Figure 1 to Figure 4 , the preparation method of the composite ceramic membrane is as follows Figure 5 As shown, it includes the following steps:

[0032] S01: Obtain the green body of the ceramic support layer;

[0033] S02: Coating the ceramic transition layer body slurry on the surface of the ceramic support layer body, and performing the first sintering treatment after drying treatment, to obtain a double-layer ceramic membrane composed of the ceramic transition layer 2 and the ceramic support layer 1 laminated and bonded ;

[0034] S03: coating the separation layer green body slurry on the surface of the ceramic transition layer 2, and then performing a second sintering treatment, so that the separation layer 3 is formed on the surface of the ceramic transition l...

Embodiment 1

[0053] The embodiment of the present invention provides a composite ceramic membrane and a preparation method thereof. The composite ceramic membrane such as figure 1 As shown, it includes ceramic support layer 1 / ceramic transition layer 2 / separation layer 3 which are stacked in sequence. Wherein, the thickness of the ceramic supporting layer 1 is 500 mm, the average porosity is 38.34%, and the average pore diameter is 318.3 nm; the thickness of the ceramic transition layer 2 is 35 μm, the average porosity is 39.86%, and the average pore diameter is 73.5 nm; The ceramic support layer 1 and the ceramic transition layer 2 are formed by sintering dredged bottom mud; the thickness of the separation layer 3 is 8 μm, the average porosity is 37.89%, and the average pore diameter is 45.3 nm. The composition of the separation layer 3 is copper-iron spinel stone.

[0054] The preparation method of the composite ceramic membrane:

[0055] S11. Preparation of ceramic support layer gree...

Embodiment 2

[0067] The embodiment of the present invention provides a composite ceramic membrane and a preparation method thereof. The composite ceramic membrane such as figure 1 As shown, it includes ceramic support layer 1 / ceramic transition layer 2 / separation layer 3 which are stacked in sequence. Wherein, the thickness of the ceramic support layer 1 is 400 mm, the average porosity is 45.73%, and the average pore diameter is 371.3 nm; the thickness of the ceramic transition layer 2 is 55 μm, the average porosity is 40.34%, and the average pore diameter is 128.3 nm; The ceramic support layer 1 and the ceramic transition layer 2 are formed by sintering dredged bottom mud; the thickness of the separation layer 3 is 5 μm, the average porosity is 28.93%, and the average pore diameter is 41.55 nm. The composition of the separation layer 3 is copper-iron spinel stone.

[0068] The preparation method of the composite ceramic membrane:

[0069] The preparation method of the composite ceramic...

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Abstract

The invention provides a composite ceramic membrane, a preparation method and application thereof. The composite ceramic membrane comprises a ceramic support layer, a ceramic transition layer and a separation layer. The ceramic transition layer is laminated on the surface of the ceramic support layer, and the separation layer is laminated on a surface of the ceramic transition layer opposite to abonding surface of the ceramic transition layer and ceramic support layer. Through the synergistic effect of the three membrane layers, the composite ceramic membrane has excellent mechanical properties, contains abundant microporous channels with adjustable and uniform pore size, effectively improves the filtration and separation effect, and can ensure the composite ceramic membrane smooth poresin the filtration and separation process, delays the attenuation of the composite ceramic membrane, and prolongs the service life of the composite ceramic membrane. The preparation method of the composite ceramic membrane provided by the invention has the characteristics of easily controllable technological conditions and mild conditions, can effectively guarantee the structure and performance stability of the prepared composite ceramic membrane, also effectively improves the preparation efficiency, and lowers the production cost.

Description

technical field [0001] The invention relates to the technical field of filter membranes, in particular to a composite ceramic membrane and its preparation method and application. Background technique [0002] In recent years, the use of membrane technology for advanced wastewater treatment and reuse is one of the hotspots in water treatment technology research. There are many reports on the treatment of domestic sewage and industrial wastewater by ultrafiltration, microfiltration or reverse osmosis. In particular, the effect of using membrane bioreactor to treat various wastewater is quite good, and generally some reuse goals can be achieved. Among them, the membrane is divided into organic membrane and ceramic membrane according to the material. Compared with organic membranes, ceramic membranes have advantages such as high temperature resistance, high pressure resistance, acid and alkali resistance and organic corrosion, high mechanical strength, good cleaning state, not ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D69/10B01D67/00C04B33/132C04B33/13C04B35/26C04B35/622C04B38/00C04B41/87
CPCB01D67/0039B01D69/10B01D69/12C04B33/13C04B33/1321C04B35/2666C04B35/622C04B38/0041C04B41/009C04B41/5046C04B41/87C04B2235/3272C04B2235/3281C04B2235/5436C04B2235/602C04B2235/656C04B2235/6567C04B2235/95C04B41/4535C04B41/0072Y02P40/60
Inventor 唐圆圆梁琨邱栋党苗
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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