CN114452830A - Disc type ceramic membrane and one-step forming method thereof - Google Patents
Disc type ceramic membrane and one-step forming method thereof Download PDFInfo
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- CN114452830A CN114452830A CN202210065056.XA CN202210065056A CN114452830A CN 114452830 A CN114452830 A CN 114452830A CN 202210065056 A CN202210065056 A CN 202210065056A CN 114452830 A CN114452830 A CN 114452830A
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- 239000012528 membrane Substances 0.000 title claims abstract description 115
- 239000000919 ceramic Substances 0.000 title claims abstract description 109
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000000047 product Substances 0.000 claims abstract description 18
- 238000001354 calcination Methods 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 238000003825 pressing Methods 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000011265 semifinished product Substances 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims abstract description 5
- 238000000576 coating method Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 239000000843 powder Substances 0.000 claims description 8
- 239000004744 fabric Substances 0.000 claims description 6
- 238000005498 polishing Methods 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 4
- 230000001788 irregular Effects 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims 7
- 238000001914 filtration Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000010304 firing Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 description 12
- 230000009471 action Effects 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000012466 permeate Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000001132 ultrasonic dispersion Methods 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- -1 suspended matters Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
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- 229910026551 ZrC Inorganic materials 0.000 description 1
- OTCHGXYCWNXDOA-UHFFFAOYSA-N [C].[Zr] Chemical compound [C].[Zr] OTCHGXYCWNXDOA-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 229910052878 cordierite Inorganic materials 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
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- 230000004151 fermentation Effects 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 239000003960 organic solvent Substances 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
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
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- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
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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
-
- 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
- B01D67/0041—Inorganic membrane manufacture by agglomeration of particles in the dry state
-
- 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
-
- 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
-
- 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
-
- 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
- B01D71/025—Aluminium oxide
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention belongs to the technical field of ceramic membranes, and particularly relates to a disc-type ceramic membrane and a one-step forming method thereof, which specifically comprise the following steps: the method comprises the following steps: laying the ceramic membrane support raw material on a mould to form a first support layer; step two: laying a loose body on the first support layer, wherein the loose body comprises combustible materials; step three: laying the ceramic membrane support body raw material on the first support layer and the loose body to form a second support layer; step four: dry pressing to form a ceramic film semi-finished product; step five: drying and calcining the ceramic membrane semi-finished product to form a ceramic membrane support finished product; step six: and coating the surface of the support body, and drying and calcining to form a ceramic membrane finished product. By adopting the support body integrated dry pressing forming technology, the overall structure of the disc-type ceramic membrane support body is firmer, and the service life of the ceramic membrane is prolonged; the ceramic membrane deformation is integrally reduced, the firing speed is high, the filtering effect of the ceramic membrane is better, and the cost is lower.
Description
Technical Field
The invention belongs to the technical field of ceramic membranes, and particularly relates to a disc-type ceramic membrane and a one-step forming method thereof.
Background
Ceramic membranes (also called inorganic ceramic membranes) are asymmetric membranes formed by preparing inorganic ceramic materials through special processes. The ceramic membrane is classified into a tubular ceramic membrane and a flat ceramic membrane. The tube wall of the tubular ceramic membrane is densely distributed with micropores, under the action of pressure, the raw material liquid flows in the membrane tube or outside the membrane, small molecular substances (or liquid) permeate the membrane, and large molecular substances (or solid) are intercepted by the membrane, so that the purposes of separation, concentration, purification, environmental protection and the like are achieved. The plate surface of the flat ceramic membrane is densely distributed with micropores, according to the fact that the permeability is different when the diameters of molecules of permeated substances are different within a certain membrane aperture range, the pressure difference between two sides of the membrane is used as a driving force, the membrane is used as a filtering medium, and under the action of a certain pressure, when feed liquid flows through the surface of the membrane, only water, inorganic salt and small molecular substances are allowed to permeate through the membrane, and macromolecular substances such as suspended matters, glue, microorganisms and the like in the water are prevented from passing through the membrane. The ceramic membrane has the advantages of high separation efficiency, stable effect, good chemical stability, acid and alkali resistance, organic solvent resistance, bacteria resistance, high temperature resistance, pollution resistance, high mechanical strength, good regeneration performance, simple separation process, low energy consumption, simple and convenient operation and maintenance, long service life and the like, is successfully applied to various fields of deep processing of foods, beverages, plants (medicines), biological medicines, fermentation, fine chemical engineering and the like, and can be used for separation, clarification, purification, concentration, sterilization, desalting and the like in the technical process. The disc-type ceramic membrane has a flying disc type external shape, a spiral permeation channel is arranged in the disc-type ceramic membrane, and a membrane layer with a separation function is arranged on the outer surface of the disc-type ceramic membrane.
Application number 201910457629.1 discloses a preparation method of dish formula dull and stereotyped ceramic filtration membrane, this dish formula dull and stereotyped ceramic filtration membrane contain supporter and separation filter layer, and the supporter is formed by two block ladder type structure concatenations, and the supporter is circular and the center is equipped with the through-hole that catchments, and it has the chamber way of catchmenting to distribute in the supporter, and the chamber way of catchmenting seals and the other end communicates to the through-hole that catchments in order to be used for discharging the solution after filtering along supporter periphery one end. According to the preparation method of the disc type flat plate ceramic filter membrane, the support body is formed by bonding and combining the two same step-shaped structures, the support body is prepared firstly, and then the support body is bonded together, the preparation process is complex in the mode, the working procedures are complex, the bonding mode is adopted, the overall structure is unstable, the support body structure is easy to separate in the long-term use process, the filter effect of the ceramic membrane is reduced, and the service life of the ceramic membrane is shortened.
Disclosure of Invention
The scheme provides a disc-type ceramic membrane with long service life and a one-step forming method thereof.
In order to achieve the purpose, the scheme provides a one-step forming method of a disc-type ceramic membrane, which comprises the following steps:
the method comprises the following steps: laying the ceramic membrane support raw material on a mould to form a first support layer;
step two: laying a loose body on the first support layer, wherein the loose body comprises combustible materials;
step three: laying the ceramic membrane support body raw material on the first support layer and the loose body to form a second support layer;
step four: dry pressing to form a ceramic film semi-finished product;
step five: drying and calcining the ceramic membrane semi-finished product to form a ceramic membrane support finished product;
step six: and coating the surface of the support body, and drying and calcining to form a ceramic membrane finished product.
Furthermore, the ceramic membrane support raw material is in a slurry state or a dry powder state. Ceramic films can be produced using various types of raw materials.
Further, in the fifth step, the finished support body is subjected to surface polishing treatment. The surface of the support body is smooth, the coating is convenient, and the quality of the ceramic membrane is improved.
Further, the thickness of the first supporting layer is the same as that of the second supporting layer or is larger than that of the second supporting layer, and the thickness difference range of the thickness of the first supporting layer and that of the second supporting layer is 0 mm-0.2 mm. The ceramic membrane is integrally symmetrical, and the filtering effect is better.
Further, the loose body is in a parabolic shape, a linear shape, a broken line shape, a spot shape, a honeycomb shape or an irregular shape. The water collecting channel formed by calcination meets different requirements.
Further, the diameter of the whole cloth of the loose body is smaller than the diameter of the first supporting layer and the diameter of the second supporting layer.
Further, the thickness of the first supporting layer and the thickness of the second supporting layer are both 0.3-4 mm; the height of the loose body is 0.1-4 mm.
Furthermore, the water collecting through holes of the ceramic membrane are made in a cloth calcining mode or in a ceramic membrane finished product punching mode.
In order to achieve the purpose, the scheme provides a disc-type ceramic membrane, and the disc-type ceramic membrane is prepared by the disc-type ceramic membrane one-step forming method.
The invention permeates the solution from the top film of the separation filter layer, the pollutants are remained on the top film or the bottom film under the action of the top film or the bottom film, and the filtered solution enters the water collecting channel and finally enters the water collecting through hole. By adopting the support body integrated dry pressing forming technology, the overall structure of the disc-type ceramic membrane support body is firmer, and the service life of the ceramic membrane is prolonged; the ceramic membrane deformation is integrally reduced, the firing speed is high, the filtering effect of the ceramic membrane is better, and the cost is lower.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
FIG. 2 is a schematic structural view of a support body according to embodiment 1 of the present invention.
FIG. 3 is a schematic diagram of a disk-type ceramic membrane according to example 1 of the present invention.
Detailed Description
The following is further detailed by the specific embodiments:
reference numerals in the drawings of the specification include: the device comprises a top film 1, a bottom film 2, water collecting through holes 3, a support body 4 and a water collecting channel 5.
Example 1:
the disc-type ceramic membrane, as shown in fig. 1, fig. 2 and fig. 3, specifically includes: the filter comprises a support body 4 and a separation filter layer, wherein the separation filter layer comprises a top film 1 and a bottom film 2, and the top film 1 and the bottom film 2 are respectively positioned on the upper surface and the lower surface of the support body 4. The support body 4, the top film 1 and the bottom film 2 are integrally arranged; the supporting body 4 is in a flying saucer shape, and a water collecting through hole 3 is formed in the center of the supporting body 4. The outer peripheral end of the support body 4 is closed; and a water collecting channel 5 is arranged in the support body 4, the water collecting channel 5 is used for discharging filtered solution, and the water collecting channel 5 is communicated with the water collecting through hole 3.
The solution permeates from the top film 1 of the separation filter layer, the pollutants are remained on the top film 1 or the bottom film 2 under the action of the top film 1 or the bottom film 2, and the filtered solution enters the water collecting channel 5 and finally enters the water collecting through hole 3. By adopting the support body 4 integrated dry pressing forming technology, the overall structure of the disc-type ceramic membrane support body 4 is firmer, and the service life of the ceramic membrane is prolonged; the ceramic membrane deformation is integrally reduced, the firing speed is high, the filtering effect of the ceramic membrane is better, and the cost is lower.
The scheme also provides a one-step forming method of the disc-type ceramic membrane, which specifically comprises the following steps:
the method comprises the following steps: distributing the raw material of the ceramic membrane support body 4 in a mold to form a first support layer, wherein the thickness of the compacted first support layer is generally controlled to be 0.3-4 mm; the ceramic membrane support 4 is made of slurry or dry powder. Ceramic films can be produced using various types of raw materials. Before the slurry raw material is used, the raw material needs to be subjected to vacuum defoaming treatment for 45min to remove redundant bubbles. The ceramic membrane support body 4 is made of ceramic powder, and the average diameter of the ceramic powder is 0.1-1 mu m. The ceramic powder is alumina, titania, cordierite, zirconia, bauxite, etc.
Step two: laying a loose body on the first support layer, wherein the loose body comprises combustible materials; the height of the loose body is 0.1-4 mm. According to the inner structure of the designed disc-type membrane, combustible materials or a mixture of the combustible materials and the raw materials of the support body 4 are distributed, the shape can be a straight line, a broken line, a parabola, a spot, a hexagon, a honeycomb, an irregular line and the like, the part forms a water flow channel of the disc-type membrane after being burnt, and the thickness of the channel layer is generally controlled to be 0.3-4 mm after being compacted; the combustible is carbon material or starch, and the starch and the carbon material are conveniently calcined to form the water collecting channel 5.
Step three: laying the ceramic membrane support body 4 on the first support layer and the loose body to form a second support layer, compacting the second support layer, and controlling the thickness of the compacted second support layer to be 0.3-4 mm, wherein the thickness of the second support layer is the same as or close to that of the first support layer; the thickness of the first supporting layer is larger than that of the second supporting layer, and the thickness difference range of the thickness of the first supporting layer and the thickness of the second supporting layer is 0 mm-0.2 mm. The diameter of the whole cloth of the loose body is smaller than the diameter of the first supporting layer and the diameter of the second supporting layer. Preferably, the diameter of the first support layer is the same as the diameter of the second support layer.
Step four: dry pressing, and then demoulding to form a ceramic membrane semi-finished product; dry pressing from the second support layer to the first support layer. Specifically, a press is used for dry pressing, the press is a short name of a press, a hydraulic press and an oil press, the press refers to a forming machine for forming industrial products through pressure, and generally adopts a hydraulic oil cylinder, so the press is also called as the oil press. The pressure of the dry pressure is 20-200 Mpa. The ceramic membrane has good green body strength and high compactness under the pressure, and is easier to be sintered.
Step five: drying and calcining the ceramic membrane semi-finished product to form a ceramic membrane support body 4 finished product; combustible parts in the loose bodies are combusted to form water collecting channels 5 in the step, the thickness of the water collecting channels 5 is 0.1-0.4 mm, and the loose bodies are dried at the temperature of 60-200 ℃ for 80-300 min and then calcined at the temperature of 1250-1750 ℃. The drying is carried out firstly and then the calcination is carried out, and the drying facilitates the layering of the support body 4, the top film 1 and the bottom film 2. In the step, the finished product of the supporting body 4 is subjected to surface polishing treatment according to the surface smoothness of the finished product of the supporting body 4 and specific requirements. The surface polishing treatment makes the surface of the support body 4 smooth, facilitates film coating and improves the quality of the ceramic film.
Step six: coating the surface of the support body 4 to form a top film 1 and a bottom film 2, and drying and calcining to form a ceramic film finished product. This step can be repeated as many times as necessary for film control. The used raw materials of the top film 1 and the bottom film 2 are made of ceramic powder, and the average diameter of the ceramic powder is 0.05-5 mu m.
The water collecting through holes 3 of the ceramic membrane are distributed in a distributing stage, and the water collecting through holes 3 are formed in a distributing dry pressing and final calcining mode as the mode of manufacturing the water collecting channels 5. Or perforating the ceramic membrane after calcining and forming to form the water collecting through holes 3.
The ceramic membrane finished product is subjected to hole opening according to the specific design of the mould, and if the mould design already comprises the water collecting through holes 3 of the ceramic membrane, the hole opening is not needed when the ceramic membrane finished product is manufactured; if the mold does not contain the water collecting through holes 3 of the ceramic membrane, a hole opener is adopted to open holes in the center of the ceramic membrane when the ceramic membrane finished product is manufactured, and the water collecting through holes 3 are formed in the center of the ceramic membrane finished product.
According to the invention, the solution permeates from the top film 1 of the separation filter layer, under the action of the top film 1 or the bottom film 2, pollutants are remained on the top film 1 or the bottom film 2, and the filtered solution enters the water collecting channel 5 and finally enters the water collecting through hole 3. By adopting the support body 4 integrated dry pressing forming technology, the overall structure of the disc-type ceramic membrane support body 4 is firmer, and the service life of the ceramic membrane is prolonged; the ceramic membrane deformation is integrally reduced, the firing speed is high, the filtering effect of the ceramic membrane is better, and the cost is lower.
Example 2:
the difference between the embodiment and the embodiment 1 is that in the step five, firstly, the ceramic membrane semi-finished product is calcined for 1-2 hours at 1250-1300 ℃, and ultrasonic dispersion is carried out at the same time; and heating for 30min to increase the calcining temperature to 1300-1750 ℃ for calcining and forming.
When the temperature is 1250-1300 ℃, the combustible matter can be combusted, oxygen in the space formed by the first supporting layer and the second supporting layer is consumed, a channel formed by the space formed by the first supporting layer and the second supporting layer and the circulation of outside air is smaller, oxygen in the space formed by the first supporting layer and the second supporting layer can be less, when the temperature is 1250-1300 ℃, the combustible matter is combusted to mainly generate CO gas, and the generated CO gas can escape to the outside through the first supporting layer and the second supporting layer to form CO at high temperature to form CO2The porosity, the membrane flux and the filtration efficiency of the support body 4 can be improved under the action of CO gas, so that the separation performance of the ceramic membrane is better, and bacteria and heavy metals can be adsorbed in the pore structure of the support body 4 particularly in the process of medical wastewater and heavy metals. Ultrasonic dispersion is carried out in the process to ensure that combustible materials are fully contacted with oxygen to form more CO gas, so that the porosity, the membrane flux and the filtration efficiency of the support body 4 are improved, and the sewage filtration efficiency of the top membrane 1 and the bottom membrane 2 is conveniently improved.
The temperature is stable for 30min, the calcining temperature is increased to 1300-1750 ℃, ultrasonic dispersion is stopped at the temperature, combustible material dispersion is prevented, the formation of the water collecting channel 5 is influenced, the oxygen content in the space formed by the first supporting layer and the second supporting layer is very low at the stage and is close to an oxygen-free environment, at the moment, the C substance in the combustible material reacts with titanium oxide and zirconium oxide, so that a layer of titanium carbide and zirconium carbide is generated on the surface of the pore structure of the supporting body 4, and the rigidity of the pore structure of the supporting body 4 is increased.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (9)
1. The one-step forming method of the disc-type ceramic membrane is characterized by comprising the following steps of:
the method comprises the following steps: laying the ceramic membrane support raw material on a mould to form a first support layer;
step two: laying a loose body on the first support layer, wherein the loose body comprises combustible materials;
step three: laying the ceramic membrane support body raw material on the first support layer and the loose body to form a second support layer;
step four: dry pressing to form a ceramic film semi-finished product;
step five: drying and calcining the ceramic membrane semi-finished product to form a ceramic membrane support finished product;
step six: and coating the surface of the support body, and drying and calcining to form a ceramic membrane finished product.
2. The one-step molding method of a disc-type ceramic membrane according to claim 1, wherein: the ceramic membrane raw material is in a slurry state or a dry powder state.
3. The one-step molding method of a disc-type ceramic membrane according to claim 1, wherein: and fifthly, carrying out surface polishing treatment on the support body finished product.
4. The one-step molding method of a disc-type ceramic membrane according to claim 1, wherein: the thickness of the first supporting layer is the same as that of the second supporting layer or the thickness of the first supporting layer is larger than that of the second supporting layer, and the thickness difference range of the thickness of the first supporting layer and that of the second supporting layer is 0 mm-0.2 mm.
5. The one-step molding method of a disc-type ceramic membrane according to claim 1, wherein: the shape of the cloth of the loose body is parabolic, linear, zigzag, spot, honeycomb or irregular.
6. The one-step molding method of a disc-type ceramic membrane according to claim 1, wherein: the diameter of the whole cloth of the loose body is smaller than the diameter of the first supporting layer and the diameter of the second supporting layer.
7. The one-step molding method of a disc-type ceramic membrane according to claim 1, wherein: the thicknesses of the first supporting layer and the second supporting layer are both 0.3-4 mm; the height of the loose body is 0.1-4 mm.
8. The one-step molding method of a disc-type ceramic membrane according to claim 1, wherein: the water collecting through holes of the ceramic membrane are made in a cloth calcining mode or in a ceramic membrane finished product punching mode.
9. A disk ceramic membrane, characterized in that it is produced by the method according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210065056.XA CN114452830B (en) | 2022-01-18 | 2022-01-18 | Disc type ceramic membrane and one-step forming method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210065056.XA CN114452830B (en) | 2022-01-18 | 2022-01-18 | Disc type ceramic membrane and one-step forming method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN114452830A true CN114452830A (en) | 2022-05-10 |
| CN114452830B CN114452830B (en) | 2023-11-03 |
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| CN202210065056.XA Active CN114452830B (en) | 2022-01-18 | 2022-01-18 | Disc type ceramic membrane and one-step forming method thereof |
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| CN114311225A (en) * | 2022-01-18 | 2022-04-12 | 重庆兀盾纳米科技有限公司 | Disc type ceramic membrane and high-pressure slip casting method thereof |
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