CN104492266A - Multi-channel tubular ceramic membrane element - Google Patents
Multi-channel tubular ceramic membrane element Download PDFInfo
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- CN104492266A CN104492266A CN201410820927.XA CN201410820927A CN104492266A CN 104492266 A CN104492266 A CN 104492266A CN 201410820927 A CN201410820927 A CN 201410820927A CN 104492266 A CN104492266 A CN 104492266A
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Abstract
The invention discloses a multi-channel tubular ceramic membrane element which comprises a porous support layer and a top-layer membrane layer coating the surface of the porous support body, wherein the top-layer membrane layer is prepared by adopting a method comprising the following steps: (1) preparing a powder body I with a diameter of about 200-300nm; (2) preparing a powder body II with a particle size of 1-2 micrometers; and (3) mixing the powder body I and the powder body II, adding a dispersing agent in the mixed powder body, ball-grinding and mixing to obtain a uniform and stable top-layer membrane suspension slurry, and sintering at a temperature of 1200-1300 DEG C. According to the multi-channel tubular ceramic membrane element, the property of a coating slurry can not be influenced, the continuity of the surface of the membrane can not be damaged and the permeability is not reduced; the multi-channel tubular ceramic membrane element has a function of only forming mutually-discontinuous bulges, and a turbulent flow caused by the bulges ensures that the permeation flow around the turbulent flow is remarkably increased and kept not being attenuated.
Description
Technical field
The present invention relates to a kind of multichannel tubular ceramic membrane elements.
Background technology
Ceramic membrane is the separating medium with screening usefulness adopting ceramic powder sintering to manufacture.Compared with the high polymer diffusion barrier of comparatively early industrialization, the speciality of inorganic separating film is that pore-size distribution is narrow, separating property good, high temperature resistant, chemically stablize, do not corrode by organic solvent, bacterium, can clean by soda acid, high mechanical properties, indeformable, can high pressure recoil, vapours regeneration, backwash etc.Ceramic membrane separation element is generally the asymmetric apertures gauge structure preparing one or more layers on macropore supporter, industry-wideization and the marketization be have rule arrangement channel design tubular ceramic membrane elements, this multi-passage design, can ensure that membrane component has enough large mechanical strength on the one hand, guarantor unit's volume element has larger total filter area on the other hand, thus can filtering efficiency be improved and reduce manufacturing cost, reduce occupation area of equipment.
But along with the developing in application of membrane separation technology field, ceramic membrane filter technology shows some unsatisfactory parts, need to be improved, wherein mainly the pump operated amount of liquid of ceramic membrane separation process is large, equipment investment and operation energy consumption higher.The 19 passage ceramic separation film elements (for 30mm, effective length is about 100cm to outside diameter) being 4mm with the membrane channels diameter of current extensive commercialization and application are for example, and the membrane module filter area of 19 film cores is approximately 4.4 m
2.In certain typical sewage disposal process, when crossflow velocity is 5m/sec, stabilized flux is approximately 100 l/m
2h, total diffusate flow is 440 L per hour, and liquid-circulating flow is approximately F=3.142 x (0.2cm)
2x 19 x 19 x 500 cm/Sec x 3600 Sec=
81.7 m 3 .visible circular flow is 185.6 times of the seepage discharge flowing through film, which consumes mass energy.Several assembly (as 3-4) series connection, equipment can be reduced and take up an area space, principle cocycle amount seems to reduce several times, but still be 45-60 times of efflux, moreover not only increase the resistance between assembly, improve energy consumption, due to transmembrane pressure rapid decrement in the flowing direction, thus in fact do not reach the effect of anticipation, in actual engineering design, the design of multiple membrane module series connection is less and less.In order to reduce energy consumption, just must reduce crossflow velocity, and concentration gradient boundary layer thickness cannot be reduced like this, thus high fluid flux cannot be kept, so utilize the expense of ceramic membrane separation process waste water too high and be difficult to large-scale application.
Summary of the invention
The object of the present invention is to provide one both can not affect the habit of ceramic membrane coating coating slurry (top layer rete), also can not destroy the successional of film surface (low energy consumption) can keep the multichannel tubular ceramic membrane elements of high permeating flux in low crossflow velocity situation.
Multichannel tubular ceramic membrane elements of the present invention, comprise porous supporting body and the top layer rete being coated in described open support surface, described top layer rete adopts following method to prepare:
(1) get the basic zirconium chloride of molar concentration 0.1M and each 10ml of yttrium nitrate solution of molar concentration 0.1M, instilled in excess of ammonia water, form co-precipitation, after washing and alcohol wash, calcination at 750 DEG C, obtains the powder one that diameter is about 200-300nm;
(2) to get etc. alumina powder and the zirconia powder of quality, add the deionized water with quality such as alumina powders, ball milling 12 hours on shaft type ball mill, obtains the powder two of particle diameter 1-2 μm;
(3) above-mentioned steps (1) gained powder one is got and step (2) gained powder two mixes, and add dispersant acrylic acid-acrylic ester-phosphoric acid-sulfonic acid copolymer wherein, put into ball grinder, on grinding machine, ball milling mixing is carried out with the porcelain ball of diameter 10mm, obtain uniform and stable top layer film suspended nitride, then sinter at 1200-1300 DEG C.
Preferably, the quality of the described powder two of step (3) is the 1%-5% of powder one quality.
Preferably, step (3) described dispersant dosage is the 0.5%-1.5% of powder one and powder two gross mass.
In the extruded process of tubular ceramic film support, make formation have the film surface of helical configuration by additional processing, just may form turbulent flow with less fluid crossflow velocity.But this manufacturing process is very complicated, in fact also cannot to this compromise face structure additional on the inner surface of thin channel.The present invention improves the technique manufacturing top layer film, forms a kind of special surface.The method that current great majority prepare ceramic separation film layer all adopts so-called " suspension ceramic particle coating process ", namely a kind of powdery pulp is made with the ceramic powder of suitable particle size, be coated in the multi-channel surface of porous supporting body, after dry calcination, form ceramic membrane.Based on above-mentioned, the present invention is the ceramic particle adding the greater particle size of certain proportion number in the suspended particles slurry for coating top layer film, and after rete sintering, this larger haydite can form the raised structures of random distribution on surface.Due to the existence of this raised structures, under lower crossflow velocity, just can form turbulence state near surface, thus can significantly improve and keep circulation.Above-mentioned a certain proportion of Large stone particle, refer to larger than the ceramic particle diameter of rete 5-10 times of its particle diameter, its amount accounts for 1-5%.In other words, both the habit of coating coating slurry can not have been affected, also can not destroy the continuity on film surface and reduce its permeability, its effect just forms mutual discontinuous projection, and the turbulent flow that their existence causes makes the permeation flux around it enlarge markedly and keeps unattenuated.
Detailed description of the invention
Following embodiment further illustrates using as the explaination to the technology of the present invention content for content of the present invention; but flesh and blood of the present invention is not limited in described in following embodiment, those of ordinary skill in the art can and should know any simple change based on connotation of the present invention or replace all should belong to protection domain of the presently claimed invention.
embodiment 1
The multichannel tubular ceramic membrane elements of this example, comprise porous supporting body and the top layer rete being coated in described open support surface, described top layer rete adopts following method to prepare:
(1) get the basic zirconium chloride of molar concentration 0.1M and each 10ml of yttrium nitrate solution of molar concentration 0.1M, instilled in excess of ammonia water, form co-precipitation, after washing and alcohol wash, calcination at 750 DEG C, obtains the powder one that diameter is about 200-300nm;
(2) to get etc. alumina powder and the zirconia powder of quality, add the deionized water with quality such as alumina powders, ball milling 12 hours on shaft type ball mill, obtains the powder two of particle diameter 1-2 μm;
(3) get above-mentioned steps (1) gained powder one 100g and step (2) gained powder two 2g to mix, and add dispersant acrylic acid-acrylic ester-phosphoric acid-sulfonic acid copolymer 1g wherein, put into ball grinder, on grinding machine, ball milling mixing is carried out with the porcelain ball of diameter 10mm, obtain uniform and stable top layer film suspended nitride, then sinter at 1200-1300 DEG C.Gained ceramic membrane element pure water permeation flux 1.23m
3/ m
2.h.Br.
embodiment 2
The multichannel tubular ceramic membrane elements of this example, comprise porous supporting body and the top layer rete being coated in described open support surface, described top layer rete adopts following method to prepare:
(1) get the basic zirconium chloride of molar concentration 0.1M and each 10ml of yttrium nitrate solution of molar concentration 0.1M, instilled in excess of ammonia water, form co-precipitation, after washing and alcohol wash, calcination at 750 DEG C, obtains the powder one that diameter is about 200-300nm;
(2) to get etc. alumina powder and the zirconia powder of quality, add the deionized water with quality such as alumina powders, ball milling 12 hours on shaft type ball mill, obtains the powder two of particle diameter 1-2 μm;
(3) get above-mentioned steps (1) gained powder one 100g and step (2) gained powder two 4g to mix, and add dispersant acrylic acid-acrylic ester-phosphoric acid-sulfonic acid copolymer 1.5g wherein, put into ball grinder, on grinding machine, ball milling mixing is carried out with the porcelain ball of diameter 10mm, obtain uniform and stable top layer film suspended nitride, then sinter at 1200-1300 DEG C.Gained ceramic membrane element pure water permeation flux 1.10m
3/ m
2.h.Br.
Claims (3)
1. multichannel tubular ceramic membrane elements, comprise porous supporting body and the top layer rete being coated in described open support surface, it is characterized in that, described top layer rete adopts following method to prepare:
(1) get the basic zirconium chloride of molar concentration 0.1M and each 10ml of yttrium nitrate solution of molar concentration 0.1M, instilled in excess of ammonia water, form co-precipitation, after washing and alcohol wash, calcination at 750 DEG C, obtains the powder one that diameter is about 200-300nm;
(2) to get etc. alumina powder and the zirconia powder of quality, add the deionized water with quality such as alumina powders, ball milling 12 hours on shaft type ball mill, obtains the powder two of particle diameter 1-2 μm;
(3) above-mentioned steps (1) gained powder one is got and step (2) gained powder two mixes, and add dispersant acrylic acid-acrylic ester-phosphoric acid-sulfonic acid copolymer wherein, put into ball grinder, on grinding machine, ball milling mixing is carried out with the porcelain ball of diameter 10mm, obtain uniform and stable top layer film suspended nitride, then sinter at 1200-1300 DEG C.
2. multichannel tubular ceramic membrane elements as claimed in claim 1, it is characterized in that, the quality of the described powder two of step (3) is the 1%-5% of powder one quality.
3. multichannel tubular ceramic membrane elements as claimed in claim 1, it is characterized in that, step (3) described dispersant dosage is the 0.5%-1.5% of powder one and powder two gross mass.
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| CN201410820927.XA CN104492266B (en) | 2014-12-26 | 2014-12-26 | Multi-channel tubular ceramic membrane element |
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| CN104492266B CN104492266B (en) | 2017-02-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110423113A (en) * | 2019-07-15 | 2019-11-08 | 大连理工大学 | A kind of preparation method and application preparing ceramic membrane diffusion layer using yttrium stable zirconium oxide material |
Citations (5)
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| CN1980720A (en) * | 2003-07-09 | 2007-06-13 | 圣戈班工业陶瓷罗登塔尔股份有限公司 | Porous ceramic body and method for production thereof |
| US20090305017A1 (en) * | 2006-02-01 | 2009-12-10 | Saint-Gobain Centre De Recherches Et D'etudes Europeen | Impregnated ceramic foam made of recrystallized silicon carbide |
| CN101723683A (en) * | 2008-10-16 | 2010-06-09 | 北京有色金属研究总院 | Preparation method of yttrium oxide-stabilized zirconium oxide powder with hollow spherical nanostructure |
| CN103638826A (en) * | 2013-12-26 | 2014-03-19 | 中国科学技术大学 | Asymmetrical ceramic separation membrane and preparation method thereof |
| DK177790B1 (en) * | 2013-08-08 | 2014-07-07 | Liqtech Internat A S | A METHOD OF PRODUCING A CERAMIC FILTER MEMBRANE, A METHOD OF IMPROVING A CERAMIC FILTER MEMBRANE AND THE CERAMIC FILTER MEMBRANE OBTAINED BY THE METHOD |
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2014
- 2014-12-26 CN CN201410820927.XA patent/CN104492266B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1980720A (en) * | 2003-07-09 | 2007-06-13 | 圣戈班工业陶瓷罗登塔尔股份有限公司 | Porous ceramic body and method for production thereof |
| US20090305017A1 (en) * | 2006-02-01 | 2009-12-10 | Saint-Gobain Centre De Recherches Et D'etudes Europeen | Impregnated ceramic foam made of recrystallized silicon carbide |
| CN101723683A (en) * | 2008-10-16 | 2010-06-09 | 北京有色金属研究总院 | Preparation method of yttrium oxide-stabilized zirconium oxide powder with hollow spherical nanostructure |
| DK177790B1 (en) * | 2013-08-08 | 2014-07-07 | Liqtech Internat A S | A METHOD OF PRODUCING A CERAMIC FILTER MEMBRANE, A METHOD OF IMPROVING A CERAMIC FILTER MEMBRANE AND THE CERAMIC FILTER MEMBRANE OBTAINED BY THE METHOD |
| CN103638826A (en) * | 2013-12-26 | 2014-03-19 | 中国科学技术大学 | Asymmetrical ceramic separation membrane and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110423113A (en) * | 2019-07-15 | 2019-11-08 | 大连理工大学 | A kind of preparation method and application preparing ceramic membrane diffusion layer using yttrium stable zirconium oxide material |
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