CN114146577A - Ceramic filtering membrane capable of releasing negative ions and preparation method thereof - Google Patents
Ceramic filtering membrane capable of releasing negative ions and preparation method thereof Download PDFInfo
- Publication number
- CN114146577A CN114146577A CN202111497507.9A CN202111497507A CN114146577A CN 114146577 A CN114146577 A CN 114146577A CN 202111497507 A CN202111497507 A CN 202111497507A CN 114146577 A CN114146577 A CN 114146577A
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- 239000012528 membrane Substances 0.000 title claims abstract description 116
- 150000002500 ions Chemical class 0.000 title claims abstract description 96
- 239000000919 ceramic Substances 0.000 title claims abstract description 90
- 238000001914 filtration Methods 0.000 title claims abstract description 67
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 110
- 239000000126 substance Substances 0.000 claims abstract description 47
- 239000000463 material Substances 0.000 claims abstract description 43
- 239000000203 mixture Substances 0.000 claims abstract description 40
- 238000002156 mixing Methods 0.000 claims abstract description 28
- 238000010304 firing Methods 0.000 claims abstract description 25
- 239000002002 slurry Substances 0.000 claims description 48
- 150000001450 anions Chemical class 0.000 claims description 27
- 230000005684 electric field Effects 0.000 claims description 22
- 230000010287 polarization Effects 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 18
- 229910052613 tourmaline Inorganic materials 0.000 claims description 16
- 239000011032 tourmaline Substances 0.000 claims description 16
- 229940070527 tourmaline Drugs 0.000 claims description 16
- 239000011268 mixed slurry Substances 0.000 claims description 13
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 9
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- 239000011707 mineral Substances 0.000 claims description 6
- 150000002910 rare earth metals Chemical class 0.000 claims description 6
- 239000002893 slag Substances 0.000 claims description 6
- -1 rare earth compounds Chemical class 0.000 claims description 3
- 229910001404 rare earth metal oxide Inorganic materials 0.000 claims description 3
- 229920002994 synthetic fiber Polymers 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 44
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- 239000005995 Aluminium silicate Substances 0.000 description 19
- 235000012211 aluminium silicate Nutrition 0.000 description 19
- 238000001816 cooling Methods 0.000 description 19
- 238000007599 discharging Methods 0.000 description 19
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 18
- 239000011521 glass Substances 0.000 description 18
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 17
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- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 13
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 12
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- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 description 4
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 4
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- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
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- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
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- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
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- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
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- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
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- 229910001954 samarium oxide Inorganic materials 0.000 description 1
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- FKTOIHSPIPYAPE-UHFFFAOYSA-N samarium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[Sm+3].[Sm+3] FKTOIHSPIPYAPE-UHFFFAOYSA-N 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
- B01D53/228—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion characterised by specific membranes
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Abstract
The invention discloses a ceramic filtering membrane capable of releasing negative ions, which belongs to the technical field of ceramic filtering, and is used for filtering, so that electric ions are generated by the ceramic filtering membrane for a long time, and filtering substances are ionized; comprises a filter body layer, wherein the filter body layer contains a substance capable of releasing negative ions. The invention also discloses a preparation method of the ceramic filtering membrane, which comprises the following steps of (1) taking negative ion releasable substances according to a proportion, mixing and crushing the negative ion releasable substances to obtain negative ion releasable powder; (2) taking a filter layer material, adding the powder capable of releasing the negative ions into the filter layer material according to the formula, and mixing to obtain a filter layer mixture; (3) and forming and firing the filter layer mixture to obtain the ceramic filter membrane.
Description
Technical Field
The invention relates to the technical field of ceramic filtration, in particular to a ceramic filtration membrane capable of releasing negative ions; the invention also relates to a preparation method of the filter membrane.
Background
The ceramic filter membrane is one of inorganic filter membranes, belongs to a solid membrane material in a membrane separation technology, and is generally formed by coating a surface of an inorganic ceramic material such as alumina, zirconia, titania, silica and the like with different specifications as a support and firing the inorganic ceramic material at a high temperature, or is formed by directly firing the inorganic ceramic material such as alumina, zirconia, titania, silica and the like. The composite membrane can effectively separate and filter liquid or gas, has the characteristics of acid and alkali resistance, organic solvent resistance, microorganism resistance and high temperature resistance, has high mechanical strength, good regeneration performance and more durability, and is widely applied to various fields of environmental protection, water treatment, gas separation and purification, food processing, membrane catalysis, biomedicine, membrane bioreactors, resource recycling, fine chemical engineering and the like.
The existing ceramic filter membrane is generally prepared from inorganic materials such as aluminum oxide, silicon carbide, zirconium oxide, titanium oxide, diatomite and the like, and only realizes the function of separating and filtering substances. If the ceramic filtering membrane can play more other roles in the process of realizing substance separation and filtration, the application field of the ceramic filtering membrane is diversified, and the ceramic filtering membrane becomes a new research direction of the ceramic filtering membrane.
Disclosure of Invention
The present invention provides a ceramic filter membrane capable of releasing negative ions, which is used for filtration and generates electric ions for a long time to ionize a filter substance.
Another object of the present invention is to provide a method for preparing the ceramic filtration membrane capable of releasing negative ions, by which a ceramic filtration membrane having stable quality can be prepared.
The first technical scheme adopted by the invention is as follows:
a ceramic filtering membrane capable of releasing negative ions comprises a filtering body layer, wherein the filtering body layer contains a substance capable of releasing negative ions.
Furthermore, the content of the releasable negative ion substances in the filter body layer is 5-95%.
Furthermore, the filter body layer comprises a support body layer (2), wherein the support body layer (2) is arranged on one side of the filter body layer (1) and is fixedly connected with the filter body layer (1).
Further, the support layer (2) contains a releasable anion substance, and the content of the releasable anion substance in the support layer (2) is 5-95%.
Furthermore, the substance capable of releasing negative ions is one or the combination of natural minerals or artificial synthetic substances, the natural minerals are tourmaline, and the artificial synthetic substances are one or the combination of more of rare earth oxides, rare earth compounds, rare earth slag and negative ion powder.
The second technical scheme adopted by the invention is as follows:
a preparation method of a ceramic filter membrane capable of releasing negative ions comprises the following steps:
(1) taking the negative ion releasable substances according to the proportion, mixing and crushing to obtain negative ion releasable powder;
(2) taking a filter layer material, adding the powder capable of releasing the negative ions into the filter layer material according to the formula, and mixing to obtain a filter layer mixture;
(3) and forming and firing the filter layer mixture to obtain the ceramic filter membrane.
Furthermore, in the step (1), the pulverized powder needs to be placed in a direct-current high-voltage electric field for polarization.
Further, in the step (4), the ceramic filter membrane is placed in a direct-current high-voltage electric field for polarization, and the electric field strength is more than 800V/mm.
The third technical scheme adopted by the invention is as follows:
a preparation method of a ceramic filter membrane capable of releasing negative ions comprises the following steps:
(1) taking the negative ion releasable substances according to the proportion, mixing and crushing to obtain negative ion releasable powder;
(2) respectively taking a support body material and a filter body layer material, simultaneously adding or only adding the releasable anion powder into one of the support body material and the filter body layer material according to a formula, and mixing to prepare a support body mixed blank and filter body layer mixed slurry;
(3) forming and firing the support body mixed blank to obtain a support body layer;
(4) and covering the surface of the support body layer with the filter membrane slurry to obtain the ceramic filter membrane.
Further, in the step (1), if a plurality of kinds of negative ion releasable powders are to be prepared, the materials are respectively prepared according to the proportioning requirement, and then the materials are respectively mixed and crushed to obtain a plurality of kinds of pyroelectric powders.
Further, in the step (1), when the anion releasable substance is an artificial synthetic substance, the synthetic materials are selected in proportion and then mixed, synthesized at high temperature and then mixed.
Furthermore, in the step (1), the pulverized powder needs to be placed in a direct-current high-voltage electric field for polarization.
Further, in the step (2), if a plurality of filter layer mixed slurries are to be prepared, different anion releasable powders are respectively mixed into the filter layer materials according to the formula to prepare the plurality of filter layer mixed slurries.
Further, in the step (4), the mixed slurry of the plurality of filter layer layers is sequentially coated on the surface of the support layer.
Further, in the step (4), the support layer coated with the filter membrane slurry is fired to obtain the filter membrane.
Further, the method also comprises the step (5) of putting the filter membrane in a direct-current high-voltage electric field for polarization, wherein the electric field strength is more than 800V/mm.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the ceramic filtering membrane capable of releasing negative ions, the filtering body layer is arranged, and the substance capable of releasing negative ions is contained in the filtering body layer, so that the ceramic filtering membrane can generate negative ions for a long time, and the ceramic filtering membrane is used for filtering to ionize the filtering substance.
2. The preparation method of the ceramic filtering membrane capable of releasing negative ions comprises the steps of firstly, proportionally taking negative ion releasable substances, mixing and crushing to obtain negative ion releasable powder; the preparation method comprises the steps of adding the releasable anion powder into a filter layer material to prepare a filter membrane, or simultaneously adding the releasable anion powder into one of a support body material and a filter layer material or only adding the releasable anion powder into the support body material or the filter layer material to prepare a support body layer and a filter body layer to obtain the ceramic filter membrane.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic view of the structure of the present invention 1;
fig. 2 is a schematic structural diagram 2 of the present invention.
Description of reference numerals: 1. a filter body layer; 2. a support layer.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the following embodiments, but the present invention is not limited thereto.
Referring to fig. 1, the ceramic filter membrane capable of releasing negative ions according to the present invention comprises a filter layer 1, wherein the filter layer 1 contains a substance capable of releasing negative ions. The content of the negative ion releasable substance in the filter layer 1 is 5-95%.
Further, referring to fig. 2, the filter further comprises a support body layer 2, wherein the support body layer 2 is arranged on one side of the filter body layer 1 and is fixedly connected with the filter body layer 1.
According to the ceramic filter membrane, the material for preparing the ceramic filter membrane is added with the substance capable of releasing negative ions, so that the membrane body can generate electric ions for a long time, and air or water in and around the ceramic filter membrane can be negatively ionized.
When the ceramic filter membrane is used for filtering water, the water passing through the surfaces of pores of the ceramic filter membrane can be filtered, and the water body can be automatically electrolyzed to obtain various effects such as interface activity, chlorine stabilization, iron passivation (capable of preventing red rust generation), water reduction, silicon dioxide and viscous substances (microorganism aggregate) removal and the like, and further has the effects of bacteriostasis, degerming, deodorization and the like. Further, people drink negatively ionized water pairs with the following effects: 1. the oxygen free radicals with positive charges in human body can promote human body aging, and when people drink negatively ionized water, the negative ions in the water can neutralize the oxygen free radicals with positive charges, thereby eliminating the oxygen free radicals and delaying the aging process of the human body. 2. Can adjust the pH value of water to be alkaline, the pH value of human body fluid is about 7.4 generally, and drinking negatively ionized water can maintain the acid-base balance in human body and strengthen physique.
When the ceramic filter membrane is used for filtering air, the air passing through the surfaces of the pores can be negatively ionized, so that the air filtered by the ceramic filter membrane is clean, contains negative ion components beneficial to human bodies, and can eliminate harmful components in the air, such as formaldehyde, peculiar smell and the like. Furthermore, the negatively ionized air has the functions of regulating the ion balance of the human body, relaxing the body and mind, activating cells, improving the natural cure rate and the like, and can inhibit the oxidation or aging of the body, and the modern environment has a plurality of factors for promoting the generation of positive ions, so that the body is always in a tense state, and therefore, the negative ions are indispensable substances for modern people. In addition, the negative ions also have a deodorizing effect.
The substance capable of releasing negative ions is one or the combination of natural minerals or artificial synthetic substances, the natural minerals are tourmaline, the artificial synthetic substances are one or the combination of more of rare earth oxides, rare earth compounds, rare earth slag and negative ion powder, and the materials are added into the support layer 2 or the filter layer 1, so that the substance can generate negative ions for a long time. The releasable negative ion substance is an artificially synthesized pyroelectric material, and the content of the releasable negative ion substance in the filter layer 1 or the support layer 2 is 5-95%.
Preferably, the content of the anion releasable substance in the filter layer 1 or the support layer 2 is 35 to 65%, and the anion generating effect of the ceramic filter membrane is improved by the content ratio.
The invention discloses a preparation method of a ceramic filtering membrane capable of releasing negative ions, which comprises the following steps:
(1) the negative ion releasable substance is taken according to the proportion, mixed and crushed to obtain the negative ion releasable powder.
Furthermore, the pulverized powder needs to be placed in a direct-current high-voltage electric field for polarization.
(2) Taking a filter layer material, adding the powder capable of releasing the negative ions into the filter layer material according to the formula, and mixing to obtain a filter layer mixture. The releasable anion powder can be uniformly distributed or non-uniformly distributed in the material of the filter body layer.
(3) And forming and firing the filter layer mixture to obtain the ceramic filter membrane.
(4) The filter membrane is placed in a direct-current high-voltage electric field for polarization, the electric field strength is more than 800V/mm, the polarization can be heated, the polarization can be cooled, and the polarization can be carried out for multiple times.
The invention discloses a preparation method of a ceramic filtering membrane capable of releasing negative ions, which comprises the following steps:
(1) the negative ion releasable substance is taken according to the proportion, mixed and crushed to obtain the negative ion releasable powder.
Wherein, if a plurality of kinds of powder capable of releasing anions are prepared, the powder is prepared according to the proportion requirement, and then the powder is mixed and crushed respectively to obtain a plurality of kinds of pyroelectric powder.
When the used substance capable of releasing negative ions is an artificial synthetic substance, the synthetic materials are selected according to the proportion and then mixed, synthesized at high temperature and then mixed.
Furthermore, the pulverized powder needs to be placed in a direct-current high-voltage electric field for polarization.
(2) Respectively taking a support body material and a filter body layer material, adding the releasable anion powder into one of the support body material and the filter body layer material simultaneously or only according to the formula, and mixing to prepare the support body mixed blank and the filter body layer mixed slurry. The releasable anion powder can be uniformly distributed in the filter body layer material or the support body material, and can also be non-uniformly distributed.
If a plurality of filter layer mixed slurries are prepared, different negative ion releasable powders are respectively mixed in the filter layer materials according to the formula to prepare the plurality of filter layer mixed slurries.
(3) And forming and firing the support body mixed blank to obtain the support body layer. The forming process adopts the technical methods of extrusion forming, dry pressing forming, slip casting forming, hot pressing injection forming, injection molding forming and the like, the firing temperature is 300-1300 ℃, the firing frequency is one time, two times or more, and the firing can be baking-free.
(4) And covering the surface of the support body layer with the filter membrane slurry to obtain the ceramic filter membrane. The covering process can adopt a dip-coating method, a spraying method, a pouring method, a throwing and pouring method and the like.
The covered filter layer can be a plurality of layers, and the mixed slurry of a plurality of filter layers is covered on the surface of the support layer in sequence during preparation.
Further, the support layer coated with the filter membrane slurry is fired to obtain a filter membrane, and the firing temperature is 300 ℃ to 1300 ℃.
(5) The filter membrane is placed in a direct-current high-voltage electric field for polarization, the electric field strength is more than 800V/mm, the polarization can be heated, the polarization can be cooled, and the polarization can be carried out for multiple times.
Example 1:
the invention relates to a ceramic filtering membrane capable of releasing negative ions, which is prepared by the following steps:
1. weighing 50 kg of tourmaline powder with the average particle size of 10 microns, 5.0 kg of kaolin, 1.3 kg of talcum powder, 2.0 kg of low-temperature glass powder and 2.6 kg of methyl cellulose, putting the mixture into a mixer, uniformly mixing, adding 13 kg of water, uniformly stirring, putting the mixture into a vacuum pug mill, milling into a compact plastic mud segment, ageing for 48 hours, putting the compact plastic mud segment into a vacuum extruder, extruding and forming into a porous flat-plate-shaped support body blank, drying, putting the support body blank into a kiln, keeping the temperature at 750 ℃ for 2 hours, and taking the support body out of the kiln after cooling to obtain the porous flat-plate-shaped support body layer.
2. Weighing 10 kg of yttrium-stabilized zirconia powder with the average particle size of 0.5 micron, 430 g of low-temperature glass powder, 680 g of white carbon black, 550 g of calcium oxide, 1.8 kg of kaolin, 35 g of methylcellulose and 7.9 kg of water, putting the mixture into a ball mill, performing ball milling for 2 hours, discharging slurry, adding a defoaming agent to remove bubbles, coating the slurry on the surface required by the porous flat-plate-shaped support body layer by using a pouring curtain, drying, putting the slurry into a kiln, keeping the temperature at 700 ℃ for 1 hour, firing, cooling and discharging the slurry out of the kiln to obtain the porous flat-plate-shaped ceramic filtering membrane.
Example 2:
the invention relates to a ceramic filtering membrane capable of releasing negative ions, which is prepared by the following steps:
1. weighing 15 kg of silicon carbide powder with the average particle size of 15 microns, 10 kg of tourmaline powder with the average particle size of 10 microns, 1.7 kg of low-temperature glass powder, 1.2 kg of calcined talcum powder, 100 g of bentonite, 50 g of methylcellulose, 18 kg of water and a proper amount of water reducing agent, putting the mixture into a ball mill, mixing for 1 hour, discharging slurry, adding a defoaming agent to remove bubbles, putting the mixture into a plaster mold for pressure slip casting, drying and demolding to obtain a single-hole tubular support body blank, drying, putting the support body blank into a kiln, keeping the temperature at 800 ℃ for 2 hours for firing, cooling and then taking the support body out of the kiln to obtain the single-hole tubular support body layer.
2. Weighing 3 kg of silicon carbide powder with the average particle size of 0.5 micron, 5 kg of tourmaline powder with the average particle size of 0.5 micron, 370 g of calcined talcum powder, 1.0 kg of low-temperature glass powder, 0.1 kg of bentonite, 15 g of methylcellulose, 6.9 kg of water and a proper amount of water reducing agent, putting the mixture into a ball mill for ball milling for 2 hours, discharging slurry, adding a defoaming agent for defoaming, coating the slurry on the surface required by a single-hole tubular support body layer in an immersing manner, drying, putting the slurry into a kiln for heat preservation at 700 ℃ for 1 hour for sintering, cooling and discharging the slurry out of the kiln to obtain the single-hole tubular ceramic filtering membrane.
Example 3:
the invention relates to a ceramic filtering membrane capable of releasing negative ions, which is prepared by the following steps:
1. weighing 45 kg of quartz powder with the average particle size of 15 microns, 5 kg of needle-shaped tourmaline powder with the average particle size of 8 microns, 2.0 kg of kaolin, 1.5 kg of borax powder, 1.2 kg of white carbon black, 4.6 kg of starch and 2.0 kg of methyl cellulose, putting the mixture into a mixer, uniformly mixing, adding 19 kg of water, uniformly stirring, putting the mixture into a vacuum pug mill, refining into a compact plastic mud segment, ageing for 48 hours, putting the compact plastic mud segment into a vacuum extruder, extruding and forming into a porous tubular support body blank with (phi 40 mm-phi 8mm multiplied by 9 holes), drying, putting the support body blank into a kiln, keeping the temperature at 760 ℃ for 2 hours, cooling, and taking the support body out of the kiln to obtain the porous tubular support body layer.
2. Weighing 10 kg of quartz powder with the average particle size of 0.5 micron, 820 g of low-temperature glass powder, 250 g of kaolin, 60 g of titanium oxide, 60 g of methyl cellulose, 16.8 kg of water and a proper amount of water reducing agent, putting the mixture into a ball mill, performing ball milling for 1 hour, discharging slurry, adding a defoaming agent to remove bubbles, coating the slurry on the surface required by the porous tubular support body layer in a dipping way, drying, putting the slurry into a kiln, keeping the temperature for 1 hour at 700 ℃, firing, cooling and taking the slurry out of the kiln to obtain the porous tubular ceramic filtering membrane.
3. And placing the obtained porous tubular ceramic filter membrane in polarization equipment, electrifying direct current to form a strong electric field (2000V/mm) for polarization, keeping for 60 minutes, removing the electric field, and taking out the ceramic filter membrane to obtain the porous tubular ceramic filter membrane capable of directionally releasing negative ions.
Example 4:
the invention relates to a ceramic filtering membrane capable of releasing negative ions, which is prepared by the following steps:
1. weighing 15 kg of alumina powder with the average particle size of 15 microns, 1.5 kg of kaolin, 0.22 kg of titanium oxide, 1.25 kg of low-temperature glass powder, 1.0 kg of starch and 0.8 kg of methyl cellulose, putting the materials into a mixer, uniformly mixing, adding 6 kg of water, uniformly stirring, putting the mixture into a vacuum pug mill, milling into compact plastic mud segments, and aging for 48 hours to obtain a blank 1 for later use.
2. Weighing 15 kg of alumina powder with the average particle size of 15 microns, 15 kg of tourmaline powder with the average particle size of 15 microns, 2.0 kg of kaolin, 0.32 kg of titanium oxide, 1.30 kg of low-temperature glass powder, 2.0 kg of starch and 1.3 kg of methyl cellulose, putting the mixture into a mixer, uniformly mixing, adding 9 kg of water, uniformly stirring, putting the mixture into a vacuum pug mill, milling into compact plastic mud segments, and aging for 48 hours to obtain a blank 2 for later use.
3. And (3) mixing the blank 1 and the blank 2 according to the ratio of 1: 4, simultaneously putting the porous flat plate and the support body into a vacuum extruder alternately according to a certain proportion to be extruded and formed into a porous flat plate support body blank, drying the porous flat plate support body blank, putting the porous flat plate support body blank into a kiln to be baked for 2 hours at 750 ℃, cooling and then taking the porous flat plate support body out of the kiln to obtain the porous flat plate support body layer.
4. Weighing 6.5 kg of alumina powder with the average particle size of 0.5 micron, 0.5 kg of tourmaline powder with the average particle size of 0.5 micron, 830 g of diatomite, 1.2 kg of kaolin, 1.0 kg of low-temperature glass powder, 35 g of methyl cellulose and 6.6 kg of water, putting the mixture into a ball mill for ball milling for 2 hours, discharging slurry, adding a defoaming agent for defoaming, spraying the slurry on the surface required by a support layer of a porous flat plate, drying, putting the slurry into a kiln for heat preservation at 700 ℃ for 1 hour for firing, cooling and discharging the slurry out of the kiln to obtain the ceramic filtering membrane of the porous flat plate.
Example 5:
the invention relates to a ceramic filtering membrane capable of releasing negative ions, which is prepared by the following steps:
1. weighing 40 kg of quartz powder with the average particle size of 30 microns, 10 kg of corundum powder with the average particle size of 5 microns, 2.0 kg of kaolin, 0.5 kg of borax powder, 1.2 kg of titanium oxide, 4.6 kg of starch and 2.0 kg of methyl cellulose, putting the mixture into a mixer, uniformly mixing, adding 19 kg of water, uniformly stirring, putting the mixture into a vacuum pug mill, refining into a compact plastic mud segment, ageing for 48 hours, putting the compact plastic mud segment into a vacuum extruder, extruding and forming into a flat support body blank, drying, putting the blank into a kiln, keeping the temperature at 1200 ℃ for 2 hours, sintering, cooling and taking the blank out of the kiln to obtain the flat support body layer.
2. Preparing a ceramic film layer: weighing 10 kg of tourmaline powder with the average particle size of 0.5 micron, 550 g of white carbon black, 120 g of borax powder, 200 g of kaolin, 330 g of low-temperature glass powder, 100 g of methylcellulose, 12.0 kg of water and a proper amount of water reducing agent, putting the mixture into a ball mill, performing ball milling for 1 hour, discharging slurry, adding a defoaming agent to remove bubbles, throwing and spraying the slurry on the surface required by the flat-plate-shaped support body layer, drying, putting the slurry into a kiln, keeping the temperature at 600 ℃ for 1 hour, firing, cooling and discharging the slurry out of the kiln to obtain the flat-plate-shaped ceramic filtering membrane.
Example 6:
the invention relates to a ceramic filtering membrane capable of releasing negative ions, which is prepared by the following steps:
1. weighing 13 kg of tourmaline powder, 6 kg of quartz powder, 1 kg of silica sol, 1 kg of cerium oxide and 8 kg of water, putting the mixture into a ball mill for ball milling, discharging and drying when the granularity reaches 20 microns, and crushing to obtain the releasable anion powder for later use.
2. Weighing 20 kg of alumina powder with the average particle size of 20 microns, 30 kg of releasable anion powder, 3.2 kg of kaolin, 0.5 kg of titanium oxide, 2.7 kg of low-temperature glass powder, 3.0 kg of starch and 2.6 kg of methyl cellulose, uniformly mixing in a mixer, adding 15 kg of water, uniformly stirring, putting in a vacuum pug mill, refining into a compact plastic mud segment, aging for 48 hours, putting in a vacuum extruder, extruding and forming into a support body blank of a porous flat plate, drying, putting in a kiln, keeping the temperature at 730 ℃ for 1 hour, firing, cooling, and taking out of the kiln to obtain the support body layer of the porous flat plate.
3. Weighing 7 kilograms of stable zirconia powder with the average particle size of 0.3 micron, 3 kilograms of self-made negative ion powder with the average particle size of 0.5 micron, 800 grams of low-temperature glass powder, 200 grams of kaolin, 60 grams of titanium oxide, 130 grams of calcium oxide, 100 grams of methylcellulose, 13.5 kilograms of water and a proper amount of water reducing agent, putting the mixture into a ball mill for ball milling for 2 hours, discharging slurry, adding a defoaming agent for defoaming, spraying the slurry on the surface required by a support body layer of a porous flat plate, drying, putting the slurry into a kiln for heat preservation at 660 ℃ for 1 hour, and cooling and discharging the slurry out of the kiln to obtain the ceramic filtering membrane of the porous flat plate.
4. And (3) placing the ceramic filtering membrane of the porous flat plate in a polarization device, electrifying direct current to form a strong electric field (1500V/mm) for polarization, keeping for 60 minutes, removing the electric field, and taking out the ceramic filtering membrane of the porous flat plate to obtain the ceramic filtering membrane of the porous flat plate capable of directionally releasing negative ions.
Example 7:
the invention relates to a ceramic filtering membrane capable of releasing negative ions, which is prepared by the following steps:
1. weighing 30 kg of tourmaline powder, 20 kg of selected -containing rare earth slag powder, adding 0.3 kg of samarium oxide, putting the mixture into a ball mill for ball milling and mixing, synthesizing the mixed material at 600 ℃, and finally crushing the synthesized material to obtain the releasable anion powder for later use when the particle size is 0.1 micron.
2. Weighing 20 kg of alumina powder with the average particle size of 20 microns, 5 kg of tourmaline powder with the average particle size of 20 microns, 2.5 kg of kaolin, 0.3 kg of titanium oxide, 0.8 kg of low-temperature glass powder, 3.0 kg of starch and 1.5 kg of methyl cellulose, putting the mixture into a mixer, uniformly mixing, adding 8.0 kg of water, uniformly stirring, putting the mixture into a vacuum pug mill, milling into a compact plastic mud segment, aging for 48 hours, putting the compact plastic mud segment into a vacuum extruder, extruding and forming into a porous flat support body blank, drying, putting the support body blank into a kiln, keeping the temperature at 780 ℃ for 1 hour, cooling, and taking the support body out of the kiln to obtain the porous flat support body layer.
3. Weighing 7 kg of powder capable of releasing anions, 3 kg of titanium oxide powder with the average particle size of 0.5 micron, 150 g of white carbon black, 100 g of borax powder, 370 g of kaolin, 380 g of low-temperature glass powder, 100 g of methylcellulose, 6.0 kg of water and a proper amount of water reducing agent, putting the mixture into a ball mill, performing ball milling for 30 minutes, discharging slurry, adding a defoaming agent, and removing bubbles to obtain membrane slurry 1 for later use.
4. Weighing 5 kg of titanium oxide powder with the average particle size of 0.5 micron, 350 g of low-temperature glass powder, 120 g of kaolin, 60 g of calcium carbonate, 60 g of methyl cellulose, 7.5 kg of water and a proper amount of water reducing agent, putting the mixture into a ball mill, performing ball milling for 1 hour, discharging slurry, adding a defoaming agent, removing bubbles and obtaining membrane slurry 2 for later use.
5. Firstly, spraying the membrane slurry 2 on the surface required by the porous flat-plate-shaped support body layer, drying, then spraying the membrane slurry 1 on the surface of the membrane slurry 2, drying, putting into a kiln, keeping the temperature at 720 ℃ for 1 hour, firing, cooling, and taking out of the kiln to obtain the porous flat-plate-shaped ceramic filtering membrane.
Example 8:
the invention relates to a ceramic filtering membrane capable of releasing negative ions, which is prepared by the following steps:
1. weighing 30 kg of tourmaline powder, 20 kg of selected rare earth slag powder, 2.5 kg of cerium nitrate, 28 kg of water and 5 kg of 5% PVA aqueous solution, putting the mixture into a ball mill for ball milling and mixing, spray drying the mixed material, calcining and synthesizing at 600 ℃, and finally crushing the synthesized material to 50 microns of particle size to obtain releasable anion powder for later use.
2. Weighing 19 kg of alumina powder with the average particle size of 50 microns, 1 kg of anion powder, 1.6 kg of kaolin, 0.3 kg of titanium oxide, 1.2 kg of low-temperature glass powder, 3.0 kg of starch and 1.2 kg of methyl cellulose, uniformly mixing in a mixer, adding 7.0 kg of water, uniformly stirring, putting in a vacuum pug mill for milling into a compact plastic mud segment, ageing for 48 hours, putting in a vacuum extruder for extrusion molding into a porous flat support body blank, drying, putting in a kiln, keeping the temperature at 750 ℃ for 1 hour for firing, cooling, and taking out of the kiln to obtain the porous flat support body layer.
3. Weighing 3 kg of releasable anion powder, 7 kg of alumina powder with the average particle size of 0.5 micron, 150 g of white carbon black, 100 g of titanium oxide powder, 370 g of kaolin, 280 g of low-temperature glass powder, 100 g of methylcellulose, 6.0 kg of water and a proper amount of water reducing agent, putting the mixture into a ball mill, ball-milling for 30 minutes, discharging slurry, adding a defoaming agent to remove bubbles, and obtaining membrane slurry for later use.
4. And spraying the membrane slurry on the surface required by the porous flat-plate-shaped support body layer, drying, putting into a kiln, keeping the temperature of 600 ℃ for 1 hour, firing, cooling, and taking out of the kiln to obtain the porous flat-plate-shaped ceramic filtering membrane.
Example 9:
1. weighing 15 kg of tourmaline powder, 5 kg of carefully selected rare earth slag powder, 2.0 kg of cerium nitrate, 1.0 kg of zirconium nitrate, 0.5 kg of aluminum nitrate, 0.3 kg of sodium chloride, 12 kg of water and 2 kg of 5% PVA aqueous solution, putting the mixture into a ball mill for ball milling and mixing, spray drying the mixed slurry, calcining and synthesizing at 600 ℃, and carrying out electric polarization treatment when the synthesized material is crushed to the particle size of 20 microns to obtain the releasable negative ion powder for later use.
2. Weighing 40 kg of alumina powder with the average particle size of 80 microns, 4.6 kg of kaolin, 0.75 kg of titanium oxide, 0.83 kg of calcium carbonate, 2.0 kg of starch and 2.6 kg of methylcellulose, putting the mixture into a mixer, uniformly mixing, adding 10 kg of water, uniformly stirring, putting the mixture into a vacuum pug mill, refining into a compact plastic mud section, ageing for 48 hours, putting the compact plastic mud section into a vacuum extruder, extruding and forming into a tubular support body blank with a large pore diameter, drying, putting the blank into a kiln, keeping the temperature of 1300 ℃ for 2 hours, firing, cooling, and taking out of the kiln to obtain the tubular support body layer with the large pore diameter.
3. Weighing 5 kg of releasable anion powder, 1 kg of alumina powder with the average particle size of 20 microns, 430 g of diatomite, 600 g of kaolin, 389 g of low-temperature glass powder, 35 g of methylcellulose and 4.0 kg of water, putting the mixture into a ball mill, ball-milling for 0.5 hour, discharging slurry, adding a defoaming agent to remove bubbles, coating the slurry on the surface required by a tubular support body layer with a large pore diameter in a dipping manner, drying, putting the slurry into a kiln, keeping the temperature at 600 ℃ for 1 hour, firing, cooling and discharging the slurry out of the kiln to obtain the tubular ceramic filtering primary membrane body with the large pore diameter.
4. Weighing 2 kg of releasable anion powder, adding 10 kg of alumina non-fired ceramic membrane slurry with the average particle size of 20 microns, adding 1.0 kg of water, putting the mixture into a ball mill for ball milling for 0.5 hour, discharging the slurry, adding a defoaming agent to remove bubbles, coating the slurry on the surface of a large-aperture tubular ceramic filter primary membrane body in a dipping manner, and drying to obtain the large-aperture tubular ceramic filter membrane.
Example 10:
the invention relates to a ceramic filtering membrane capable of releasing negative ions, which is prepared by the following steps:
weighing 35 kg of alumina powder with the average particle size of 5 microns, 15 kg of tourmaline powder with the average particle size of 5 microns, 3.0 kg of kaolin, 1.3 kg of talcum powder, 4.0 kg of low-temperature glass powder, 6 kg of starch and 2.6 kg of methyl cellulose, putting the mixture into a mixer, uniformly mixing, adding 15 kg of water, uniformly stirring, putting the mixture into a vacuum pug mill, refining into a compact plastic mud segment, ageing for 48 hours, putting the compact plastic mud segment into a vacuum extruder, extruding and forming into a porous flat ceramic filtering membrane blank, drying, putting the blank into a kiln, keeping the temperature at 700 ℃ for 2 hours, firing, cooling, and taking the blank out of the kiln to obtain the porous flat ceramic filtering membrane.
The above description is only exemplary of the invention, and any modification, equivalent replacement, and improvement made within the spirit and scope of the present invention should be considered within the scope of the present invention.
Claims (16)
1. A ceramic filter membrane capable of releasing negative ions comprises a filter body layer (1), and is characterized in that the filter body layer (1) contains a substance capable of releasing negative ions.
2. The ceramic filter membrane capable of releasing negative ions according to claim 1, wherein the content of the negative ion releasable substance in the filter layer (1) is 5 to 95%.
3. The ceramic filter membrane capable of releasing negative ions according to claim 1, further comprising a support layer (2), wherein the support layer (2) is disposed on one side of the filter layer (1) and is fixedly connected with the filter layer (1).
4. The ceramic filtration membrane according to claim 1, wherein the support layer (2) contains a substance capable of releasing anions, and the content of the substance capable of releasing anions in the support layer (2) is 5-95%.
5. The ceramic filtering membrane capable of releasing negative ions according to claim 1 or 4, wherein the substance capable of releasing negative ions is one or a combination of natural minerals or synthetic substances, the natural minerals are tourmaline, and the synthetic substances are one or a combination of rare earth oxides, rare earth compounds, rare earth slag and negative ion powder.
6. A method for preparing the ceramic filter membrane capable of releasing negative ions, which is disclosed by claim 1, and is characterized by comprising the following steps of:
(1) taking the negative ion releasable substances according to the proportion, mixing and crushing to obtain negative ion releasable powder;
(2) taking a filter layer material, adding the powder capable of releasing the negative ions into the filter layer material according to the formula, and mixing to obtain a filter layer mixture;
(3) and forming and firing the filter layer mixture to obtain the ceramic filter membrane.
7. The method for preparing a ceramic filter membrane capable of releasing negative ions according to claim 6, wherein in the step (1), the pulverized powder is further subjected to polarization in a direct-current high-voltage electric field.
8. The preparation method of the ceramic filtering membrane capable of releasing the negative ions according to claim 6, characterized by further comprising the step (4) of placing the ceramic filtering membrane in a direct-current high-voltage electric field for polarization, wherein the electric field strength is more than 800V/mm.
9. A method for preparing the ceramic filter membrane capable of releasing negative ions, which is characterized by comprising the following steps:
(1) taking the negative ion releasable substances according to the proportion, mixing and crushing to obtain negative ion releasable powder;
(2) respectively taking a support body material and a filter body layer material, simultaneously adding or only adding the releasable anion powder into one of the support body material and the filter body layer material according to a formula, and mixing to prepare a support body mixed blank and filter body layer mixed slurry;
(3) forming and firing the support body mixed blank to obtain a support body layer;
(4) and covering the surface of the support body layer with the filter membrane slurry to obtain the ceramic filter membrane.
10. The method for preparing a ceramic filter membrane capable of releasing negative ions according to claim 9, wherein in the step (1), if a plurality of types of negative ion releasable powders are to be prepared, the negative ion releasable powders are prepared according to the proportioning requirement, and then are mixed and pulverized to obtain a plurality of types of pyroelectric powders.
11. The method for preparing a ceramic filtering membrane capable of releasing negative ions according to claim 9 or 10, wherein in the step (1), when the negative ion releasing substance is a synthetic substance, the synthetic materials are selected according to a certain proportion, mixed, synthesized at a high temperature and then mixed.
12. The method for preparing a ceramic filtering membrane capable of releasing negative ions according to claim 9 or 10, wherein in the step (1), the pulverized powder is further subjected to polarization in a direct-current high-voltage electric field.
13. The method of claim 10, wherein in the step (2), if a plurality of filter layer mixed slurries are prepared, different anion releasable powders are mixed in the respective filter layer materials according to the formula to prepare a plurality of filter layer mixed slurries.
14. The method for preparing a ceramic filtration membrane capable of releasing negative ions according to claim 13, wherein in the step (4), a plurality of mixed slurry of the filter layer is sequentially coated on the surface of the support layer.
15. The method for preparing a ceramic filtration membrane capable of releasing negative ions according to claim 9, wherein in the step (4), the support layer coated with the filtration membrane slurry is fired to obtain the filtration membrane.
16. The method for preparing a ceramic filter membrane capable of releasing negative ions according to claim 9, further comprising the step (5) of polarizing the filter membrane in a direct-current high-voltage electric field with an electric field strength of 800V/mm or more.
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