CN105413484B - Diatom soil matrix low cost, ecological environment-friendly type ceramic membrane and preparation method thereof - Google Patents
Diatom soil matrix low cost, ecological environment-friendly type ceramic membrane and preparation method thereof Download PDFInfo
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- CN105413484B CN105413484B CN201511000058.7A CN201511000058A CN105413484B CN 105413484 B CN105413484 B CN 105413484B CN 201511000058 A CN201511000058 A CN 201511000058A CN 105413484 B CN105413484 B CN 105413484B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/02—Inorganic material
- B01D71/024—Oxides
- B01D71/027—Silicium oxide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0039—Inorganic membrane manufacture
- B01D67/0046—Inorganic membrane manufacture by slurry techniques, e.g. die or slip-casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/06—Flat membranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/10—Supported membranes; Membrane supports
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/02—Inorganic material
- B01D71/028—Molecular sieves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/12—Specific ratios of components used
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/15—Use of additives
- B01D2323/20—Plasticizers
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Catalysts (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a kind of diatom soil matrix low cost, ecological environment-friendly type ceramic membrane, and it includes earthenware slab supporter and is coated on the separating layer membrane of earthenware slab support external surface, and apopore is provided with the earthenware slab supporter；The earthenware slab supporter generally flat board, and each corner angle of the flat board are fillet design.Flat ceramic film preparation is prepared and separated present invention also offers diatom soil matrix low cost, the preparation method of ecological environment-friendly type ceramic membrane, including earthenware slab film support.The raw material that the present invention uses is cheap, nonhazardous, and cost is low, is ecological environment-friendly type filter membrane, using easily being decomposed after scrapping, will not cause secondary pollution to environment；The earthenware slab film operation strategies of environment-friendly type of the present invention are wide, available for water process and gas disposal, the pernicious gas treatment and purification of particularly indoor house ornamentation and outdoor environment gas PM2.5 improvement.
Description
Technical field
The invention belongs to environmental protection and water-treatment technology field, and in particular to a kind of diatom soil matrix low cost, ecological environment-friendly type
Ceramic membrane and preparation method thereof.
Background technology
Membrane bioreactor is as a kind of new and effective sewage disposal technology, it has also become town sewage, industrial wastewater or even
Indispensable treatment technology in highly difficult wastewater treatment.Most crucial component is exactly seperation film in membrane bioreactor, at present
It is several that seperation film according to material is broadly divided into hollow-fibre membrane, organic Flat Membrane and earthenware slab film, hollow-fibre membrane and organic
Filter membrane bad mechanical strength existing for Flat Membrane, easily there is fracture of wire, component is dirty stifled frequent, not resistance to oxidation, acid and alkali-resistance is not clear
Wash, service life is short, and must be changed after diaphragm damage occurs, and regeneration, the problems such as operating cost is high, earthenware slab film has
Intensity is high, and service life length, resistance to oxidation is pollution-free, easy cleaning, it is easy for installation, filtration resistance is small, and performance is good the features such as, closely
Nian Lai, at home and abroad it is increasingly subject to pay attention to.
For earthenware slab film mainly using aluminum oxide, aluminium hydroxide as main material, cost of manufacture is high at present, only has separation
Function, and in the U of utility model patent CN 204724031 and the A of patent of invention CN 104828929, the outward appearance of earthenware slab film
Four corners of flat board are designed as right angle by design, and easily collide with causes broken damage in use, and intensity is not high.
Food grade kieselguhr material, have and have no toxic side effect, filter and absorption property, it is cheap the advantages that, zeolite
It with loose, the porous structure as diatomite, can be used to handle waste gas, waste water, remove or reclaim from waste water and waste liquid
Metal ion, remove radioactive pollutant in waste water.Ammonia nitrogen 95% in water is can remove, is purified water.Nano titanium oxide is due to valency
It is honest and clean, nontoxic, photocatalytic activity is strong, can be widely used for water treatment field sterilize, photocatalysis Decomposition organic matter.
The content of the invention
The present invention proposes a kind of with cheap nontoxic food grade kieselguhr to overcome above-mentioned the deficiencies in the prior art
For raw material, the low ceramic membrane of high flux that the material such as composite zeolite, titanium oxide obtains, environment-friendly type, sintering temperature.
The invention provides a kind of diatom soil matrix low cost, ecological environment-friendly type ceramic membrane, including earthenware slab support
Body and the separating layer membrane for being coated on earthenware slab support external surface, the earthenware slab supporter is interior to be provided with apopore；Institute
Earthenware slab supporter generally flat board is stated, and each corner angle of the flat board are fillet design.
Present invention also offers diatom soil matrix described above low cost, ecological environment-friendly type ceramic membrane preparation method,
Comprise the steps：
（1）It is prepared by earthenware slab film support
By diatomite of the particle diameter no more than 100 mesh with starch, binding agent, the aluminum oxide of 0.5-1 microns, zeolite in batch mixer
In be mixed into powder；The nano titanium oxide for being 20-30% by nano silicon dioxide sol that solid content is 20-30%, solid content
Dispersion liquid, water, tung oil, plasticizer are uniformly mixed, and in ceramic kneader, the powder mixed is added to spray pattern
In material, pugging is mediated, extrusion forming, the earthenware slab film support that 1-10 microns are made in 2-6h is sintered at 1000-1300 DEG C
Body；
（2）Separate flat ceramic film preparation
Into the ball-aluminium oxide suspension of solid content 10-20% 0.2-1 microns, ceramic defoamer is added, dispersant,
Ball grinding stirring 2-4 hours, add the nano-titanium oxide dispersion liquid that solid content is 20-30% and the nano oxygen that solid content is 20-30%
SiClx colloidal sol, after continuing ball grinding stirring 5-12 hours, slurry degassing process is more after earthenware slab film support one end is closed
Secondary soaking paste film, the earthenware slab film of appearance even film layer is obtained, dry fed to boiler and sinter 850-1050 DEG C, obtain average grain diameter
The ceramic membrane of 0.05-1 micron separating layers.
Diatom soil matrix described above is inexpensive, in the preparation method of ecological environment-friendly type ceramic membrane, step（1）The silicon
Diatomaceous earth adds water to stir, and upper strata suspension is removed after somewhat standing, and will be dried after lower floor's powder plate compression.
Diatom soil matrix described above is inexpensive, in the preparation method of ecological environment-friendly type ceramic membrane, step（1）In each original
Material weight, which forms, is：Counted using diatomite as 100%, it is the aluminum oxide 0.5-5% of zeolite 1-20%, 0.5-1 micron, starch 5-12%, viscous
Tie the nanometer two that agent 2-10%, the nano titanium oxide dispersion 2.5-15% that solid content is 20-30%, solid content are 20-30%
Silica sol 5-25%, water 5-12%, tung oil 1-6%, plasticizer 2-10%；The binding agent is CMC（Carboxymethyl cellulose
Element）、MC（Methylcellulose）、PVA（Polyvinyl alcohol）、HPMC（Hydroxypropyl methyl cellulose）In one or more, the increasing
Modeling agent is glycerine, PEG（Polyethylene glycol）One or both of.
Diatom soil matrix described above is inexpensive, in the preparation method of ecological environment-friendly type ceramic membrane, step（2）In each original
Material weight, which forms, is：Counted, ceramic defoamer 0.01-0.02%, dispersant 0.1-10%, consolidated using ball-aluminium oxide suspension as 100%
The colloidal silica 1-5% that nano-titanium oxide dispersion liquid 0.5-2% that content is 20-30%, solid content are 20-30%；It is described
Dispersant is PEG（Polyethylene glycol）、PAA（Polyacrylic acid）、PVA（Polyvinyl alcohol）、CMC（Carboxymethyl cellulose）One kind or several
Kind, the ceramic defoamer is polyether antifoam agent, and the DF-804 purchased from Dongguan City De Feng defoamers Co., Ltd such as can be selected.
Beneficial effect of the present invention is：
1. the raw material that the present invention uses is cheap, nonhazardous, cost is low, is ecological environment-friendly type filter membrane, uses report
Easily decomposed after useless, secondary pollution will not be caused to environment；
2. the earthenware slab film of the present invention is using food grade kieselguhr, zeolite, nano oxidized titanium composite material, except with one
As seperation film be separated by filtration outside function, the also function such as other functions such as absorption, sterilization, catalysis oxidation；Three kinds of materials are answered
Closing the diatom soil matrix earthenware slab film being prepared into has good industrial prospect, can be widely used in the purification of Drinking Water
Processing, the double purification of city tap-water, cities and towns water treatment and northern water cellar and deep-well water process.It can also be used for Indoor Air
Body purifies.
3. the present invention uses nano-titanium oxide, silica sol as additive, flat board film strength can be increased and reduced and burnt
Junction temperature, separation membrane layer pore size filter precision can need effectively control according to application system；
4. the profile of earthenware slab film of the present invention is designed as both sides semicircle, circular arc type design is reduced than right-angle side profile
Wedge angle damages caused by being collided with during use, is easy to the sealing and cleaning of membrane module；Centre bore circle apopore, strengthen again
The support strength of outer wall.
5. because raw material are loose structure, have that filtration resistance is small, porosity is high, membrane flux is big, regeneration easily,
The characteristics of being not easy to block.
6. the earthenware slab film operation strategies of environment-friendly type of the present invention are wide, available for water process and gas disposal, particularly interior
The pernicious gas treatment and purification of house ornamentation and outdoor environment gas PM2.5 improvement.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
In figure：1st, separation membrane layer；2nd, apopore；3rd, supporter.
Embodiment
Following embodiments are further explanations for present invention using as the explaination to the technology of the present invention content, but
The present invention substantive content be not limited in described in following embodiments, one of ordinary skill in the art can with and should know appoint
What simple change or replacement based on true spirit all should belong to protection domain of the presently claimed invention.
Embodiment 1
（1）It is prepared by earthenware slab film support
Take the food grade kieselguhr of 500 mesh to cross 100 mesh sieves and remove waterpower and settle the powder 50Kg being dried to obtain behind upper strata,
CMC3Kg, starch 3Kg are added, zeolite 2.5Kg, D50 are 0.5 micron of alumina powder 1Kg, are mixed in biconial batch mixer
Expect that 30min, hot water taking 3.2Kg add PEG1Kg tung oil 3Kg, the nano-silica that solid content is 30% is added after being dispersed with stirring uniformly
Change titanium dispersion liquid 7.28Kg and solid content as 30% nano silicon dioxide sol 3.35Kg, added after stirring 4h with Sprayable
Into kneader in mixed powder, pugging, extrusion forming after kneading, 1100 degree of drying and sintering, it is incubated 4 hours and obtains average hole
Footpath is 1.2 microns, and porosity is 43.3% diatomite earthenware slab film support.
(2) preparation of separation membrane layer
The ball-aluminium oxide suspension 10Kg that the median for being 15% with pure water configuration solid content is 0.25 micron, is added
Ceramic defoamer 0.015%, 0.25% dispersing agent C MC, ball grinding stirring 2 hours, add the nano-titanium oxide point that solid content is 20%
The dispersion liquid 75g and colloidal silica 100g that solid content is 30%, continues ball grinding stirring after 6 hours, slurry degassing process.Will
After the closing of earthenware slab film support one end, Flat Membrane blind end is repeatedly immersed into downwards slurry and does soaking paste film.Obtain appearance
The smooth earthenware slab film of even film layer, hang airing fed to boiler sinter 850 DEG C, are incubated 2h, and it is micro- for 0.10 to obtain average pore size
The ceramic membrane of rice separating layer.
Embodiment 2
（1）It is prepared by earthenware slab film support
Take the food grade kieselguhr of 325 mesh to cross 100 mesh sieves and remove waterpower and settle the powder 50Kg being dried to obtain behind upper strata,
HPMC4Kg, starch 5Kg are added, zeolite 1.5Kg, D50 are 1 micron of alumina powder 1.5Kg, are mixed in biconial batch mixer
Expect that 30min, hot water taking 2.5Kg add PEG3Kg tung oil 3Kg, the nano-silica that solid content is 30% is added after being dispersed with stirring uniformly
Change titanium dispersion liquid 3.35Kg and solid content as 30% nano silicon dioxide sol 8.3Kg, be added to after stirring 4h with Sprayable
In kneader in mixed powder, pugging, the profile extrusion shaping by Fig. 1,1250 degree of drying and sintering, are incubated 4 hours after kneading
Average pore size is obtained as 3.36 microns, porosity is 49.5% diatomite earthenware slab film support.
(2) preparation of separation membrane layer
The ball-aluminium oxide suspension 10Kg that the median for being 10% with pure water configuration solid content is 0.6 micron, adds pottery
Porcelain defoamer 0.02%, 5% dispersant PEG, ball grinding stirring 2 hours, add the nano-titanium oxide dispersion liquid that solid content is 30%
The 100g and colloidal silica 100g that solid content is 30%, continues ball grinding stirring after 10 hours, slurry degassing process.Will pottery
After the closing of porcelain flat membrane support one end, Flat Membrane blind end is repeatedly immersed into downwards slurry and does soaking paste film.Obtain outer pellicle
The earthenware slab film of layer uniform ground, hang airing fed to boiler sinter 1000 DEG C, are incubated 2h, obtain average pore size as 0.52 micron
The ceramic membrane of separating layer.
Embodiment 3
（1）It is prepared by earthenware slab film support
Take the food grade kieselguhr of 200 mesh to cross 100 mesh sieves and remove waterpower and settle the powder 50Kg being dried to obtain behind upper strata,
HPMC2Kg, PVA3Kg are added, starch 6Kg, zeolite 10Kg, D50 is 1 micron of alumina powder 4Kg, in biconial batch mixer
Middle batch mixing 30min, hot water taking 1Kg add PEG3Kg tung oil 1.5Kg, and the nanometer that solid content is 30% is added after being dispersed with stirring uniformly
The titanium oxide dispersion 5.5Kg and nano silicon dioxide sol 8.3Kg that solid content is 30%, is added after stirring 4h with Sprayable
Enter into kneader in mixed powder, pugging, the profile extrusion shaping by Fig. 1,1300 degree of drying and sintering, insulation 4 after kneading
Hour obtains average pore size as 5.5 microns, and porosity is 51.4% diatomite earthenware slab film support.
(2) preparation of separation membrane layer
The ball-aluminium oxide suspension 10Kg that the median for being 20% with pure water configuration solid content is 1.0 microns, adds pottery
Porcelain defoamer 0.015%, 6% dispersant PAA, ball grinding stirring 2 hours, add the nano-titanium oxide dispersion liquid that solid content is 20%
The 200g and colloidal silica 100g that solid content is 20%, continues ball grinding stirring after 8 hours, slurry degassing process.By ceramics
After the closing of flat membrane support one end, Flat Membrane blind end is repeatedly immersed into downwards slurry and does soaking paste film.Obtain outer surface film layer
The earthenware slab film of uniform ground, hang airing fed to boiler sinter 1050 DEG C, are incubated 2h, obtain average pore size as 0.8 micron point
The ceramic membrane of absciss layer.
Claims (2)
1. diatom soil matrix is inexpensive, the preparation method of ecological environment-friendly type ceramic membrane, comprise the steps：
（1）It is prepared by earthenware slab film support
Diatomite and starch, binding agent, the aluminum oxide of 0.5-1 micron, zeolite of the particle diameter no more than 100 mesh are mixed in batch mixer
Synthesize powder；The nano titanium oxide that nano silicon dioxide sol that solid content is 20-30%, solid content are 20-30% is disperseed
Liquid, water, tung oil, plasticizer are uniformly mixed, and in ceramic kneader, the powder mixed is added to spray pattern
In, pugging is mediated, extrusion forming, the earthenware slab film support that 1-10 microns are made in 2-6h is sintered at 1000-1300 DEG C
Body；Step（1）In each raw material weight composition be：Counted using diatomite as 100%, the aluminum oxide 0.5- of zeolite 1-20%, 0.5-1 micron
5%th, starch 5-12%, binding agent 2-10%, nano titanium oxide dispersion 2.5-15%, the solid content that solid content is 20-30%
For 20-30% nano silicon dioxide sol 5-25%, water 5-12%, tung oil 1-6%, plasticizer 2-10%；The binding agent is
One or more in CMC, MC, PVA, HPMC, the plasticizer are one or both of glycerine, PEG；
（2）Separate flat ceramic film preparation
Into the ball-aluminium oxide suspension of solid content 10-20% 0.2-1 microns, ceramic defoamer, dispersant, ball milling are added
2-4 hours are stirred, add the nano-titanium oxide dispersion liquid that solid content is 20-30% and the nano silicon oxide that solid content is 20-30%
Colloidal sol, after continuing ball grinding stirring 5-12 hours, slurry degassing process, after earthenware slab film support one end is closed, repeatedly leaching
Film is starched, obtains the earthenware slab film of appearance even film layer, fed to boiler is dried and sinters 850-1050 DEG C, obtain average grain diameter
The ceramic membrane of 0.05-1.0 micron separating layers；The ceramic membrane, including earthenware slab supporter and it is coated on pottery
The separating layer membrane of porcelain flat support external surface, the earthenware slab supporter is interior to be provided with apopore；The earthenware slab support
Body generally flat board, and each corner angle of the flat board are fillet design；Step（2）In each raw material weight composition be：With spherical
Aluminum oxide suspension is counted for 100%, ceramic defoamer 0.01-0.02%, dispersant 0.1-10%, the nanometer that solid content is 20-30%
Titanium oxide dispersion liquid 0.5-2%, the colloidal silica 1-5% that solid content is 20-30%；The dispersant be PEG, PAA,
PVA, CMC one or more.
2. diatom soil matrix low cost as claimed in claim 1, the preparation method of ecological environment-friendly type ceramic membrane, its feature exist
In step（1）The diatomite adds water to stir, and upper strata suspension is removed after somewhat standing, and will be done after lower floor's powder plate compression
It is dry.
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| CN106810212B (en) * | 2016-12-30 | 2020-10-23 | 海天水务集团股份公司 | Manufacturing process of efficient flat ceramic membrane |
| WO2018215985A1 (en) * | 2017-05-25 | 2018-11-29 | Charles Ramberg | Filter element |
| CN108484209B (en) * | 2018-04-09 | 2020-11-03 | 四川兴凯歌建设工程有限公司 | Flat ceramic membrane and preparation process thereof |
| CN108892516A (en) * | 2018-07-27 | 2018-11-27 | 重庆兀盾纳米科技有限公司 | A kind of ceramic membrane compression moulding preparation method and its product obtained |
| CN110256059B (en) * | 2019-06-12 | 2021-08-03 | 山东工业陶瓷研究设计院有限公司 | High-flux ceramic flat membrane and preparation method thereof |
| CN111545078A (en) * | 2020-05-15 | 2020-08-18 | 洛阳中超新材料股份有限公司 | Flat ceramic membrane and preparation method thereof |
| CN112316743B (en) * | 2020-10-22 | 2021-08-06 | 哈尔滨工业大学（威海） | Preparation method of low-cost low-density catalytic functional ceramic membrane |
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| CN1530165A (en) * | 2003-03-13 | 2004-09-22 | 上海一鸣过滤技术有限公司 | Orifice model flat microporous membrane |
| CN101791524B (en) * | 2010-03-26 | 2012-06-27 | 南京工业大学 | Asymmetrically-structural ceramic ultrafiltration membrane and preparation method thereof |
| CN202054660U (en) * | 2011-03-02 | 2011-11-30 | 江苏大孚膜科技有限公司 | Immersed flat plate filter membrane element for membrane bioreactor |
| CN103011893A (en) * | 2012-12-18 | 2013-04-03 | 常州大学 | Diatomite substrate-shaped ceramic membrane, and preparation method and application thereof |
| CN103381338B (en) * | 2013-07-30 | 2015-02-18 | 广州中国科学院先进技术研究所 | Ceramic flat membrane supporting body and production method thereof |
| CN104258737B (en) * | 2014-09-10 | 2016-01-27 | 山东工业陶瓷研究设计院有限公司 | The preparation method of large size, thin walled hollow ceramic membrane |
| CN104828929A (en) * | 2015-03-26 | 2015-08-12 | 唐山力必拓科技有限责任公司 | An anti-pollution multifunctional ceramic flat sheet membrane |
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