CN115646213A - Ceramic array type filter element - Google Patents
Ceramic array type filter element Download PDFInfo
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- CN115646213A CN115646213A CN202211300519.2A CN202211300519A CN115646213A CN 115646213 A CN115646213 A CN 115646213A CN 202211300519 A CN202211300519 A CN 202211300519A CN 115646213 A CN115646213 A CN 115646213A
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Abstract
The invention belongs to the technical field of filter elements, and particularly relates to a ceramic array type filter element. The ceramic array type filter element provided by the invention comprises a filter element body, wherein an outer cover shell is sleeved outside the filter element body, a first end cover and a second end cover are respectively arranged at two ends of the filter element body, the filter element body is formed into an annular array structure by connecting a plurality of ceramic filter elements, and the annular array structure is provided with a central hole. The ceramic array type filter element provided by the invention has the characteristics of high effective filtering area, high dirt receiving capacity, capability of being repeatedly cleaned, excellent filtering performance, high temperature and strong alkali resistance, high flux, wide application field and splicing; the miniaturized ceramic filter element sheet can effectively reduce the difficulty of the preparation process of the ceramic filter element, and realize the simplification of product preparation and the enrichment of functional types.
Description
Technical Field
The invention belongs to the technical field of filter elements, and relates to a ceramic array type filter element.
Background
The organic filtering membrane can be processed into spiral-wound, foldable and hollow fiber type organic filtering cores due to the easy processing characteristic of the organic material, so that the membrane area of the filtering core in unit volume is greatly increased, and the application scenes of the filtering core are greatly widened. And the machine-shaping degree of difficulty of ceramic material is big, and the form changes such as folding, bending are very difficult to realize, and this makes ceramic filter core's structure comparatively simple and easy, is the tubular structure usually, can't process into diversified filter core product.
From the perspective of improving the filtration area of a unit volume, the difficulties of forming and processing of the ceramic are overcome firstly, and from the research progress at present, the membrane area of the unit volume of the hollow fiber structure ceramic filter element is the largest, and then the porous tube type and flat plate type ceramic filter elements are adopted. Although the membrane area of the hollow fiber type ceramic filter element is large, the problem that a membrane tube is bent when the membrane is dried and fired when the length of the membrane is long cannot be solved, and meanwhile, the thin and long ceramic fiber tube is easy to damage in the application process and is not widely accepted in the actual market application. Although the filtering area of the multi-channel tubular ceramic filter element is increased in morphological structure, the internal channel of the multi-channel tubular ceramic filter element does not provide filtering flux with corresponding proportion, only the filtering surface of the peripheral channel plays a main filtering role, and the internal channel is easy to block, low in pollutant carrying capacity and required to be frequently washed. In addition, the components of the tubular ceramic membranes are relatively complex and expensive.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a ceramic array type filter element which is formed by connecting a plurality of ceramic filter element sheets to form an annular array type filter element body, so that the effective filtering area of the filter element is effectively increased, and the filter element is compact and small in structure.
In order to realize the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a pottery array filter core includes the filter core body, the filter core body overcoat is equipped with the dustcoat casing, the both ends of filter core body are provided with first end cover and second end cover respectively, the filter core body forms annular array structure for being connected by a plurality of ceramic filter core pieces, annular array structure has the centre bore.
According to the invention, the filter element body is a core component of the ceramic array type filter element, and has the functions of filtering and separating, and the ceramic filter element sheets are connected to form the annular array type filter element body, so that the effective filtering area of the filter element is effectively increased, and the filter element is compact and small in structure.
Preferably, the cross section of the central hole is a regular polygon.
Preferably, the ceramic filter element sheet comprises at least one ceramic filter element single sheet, and the ceramic filter element single sheet comprises a ceramic support body and a membrane layer covering the ceramic support body.
Further preferred, the ceramic filter core monolithic is including the first ceramic plate, second ceramic plate and the third ceramic plate that connect gradually, first ceramic plate and third ceramic plate parallel arrangement, be provided with a plurality of ceramic baffles between first ceramic plate and the third ceramic plate, the equidistant setting of ceramic baffle, pass through in the ceramic filter core monolithic ceramic baffle forms drainage channel, drainage channel with the centre bore intercommunication.
In the invention, because a plurality of drainage channels are formed in the ceramic filter element single sheets by the separation of a plurality of ceramic partition plates, the filter element body formed by the connection of a plurality of ceramic filter element single sheets is in a honeycomb shape. The honeycomb-shaped filter element body is beneficial to enhancing the supporting strength of the ceramic filter element single piece, so that the thickness of the filter element body is reduced while the supporting strength of the filter element body is ensured, and the thickness of the ceramic filter element monomer is preferably 1.5-5mm.
Further preferably, the ceramic support is produced by any one of extrusion molding, press molding and 3D printing.
Still further preferably, the extrusion molding method comprises the steps of: mixing ceramic raw materials and deionized water, and then refining mud and ageing to obtain mud materials; extruding and molding the pug to prepare a hollow honeycomb-shaped wet blank; drying the obtained wet blank to obtain a dry blank; and sintering the obtained dry blank and then cutting to obtain the ceramic support body.
Still further preferably, the method of press forming comprises the steps of: uniformly mixing ceramic raw materials and granulating to obtain granulated powder; placing the granulation powder in a mold, and pressing by using a press to obtain a biscuit; drying the biscuit to obtain a dry biscuit; and sintering the obtained dry blank, and then cutting to obtain the ceramic support body.
Still further preferably, the 3D printing method includes the steps of: mixing ceramic raw materials and deionized water, and then refining mud and ageing to obtain mud materials; the method comprises the steps of guiding a preset three-dimensional structure model into a 3D printer, carrying out slicing processing to obtain an executable program, loading prepared ceramic pug into a material barrel of the extrusion type 3D printer, extruding the pug to a workbench through an extrusion screw rod through an extrusion nozzle, and carrying out layer-by-layer stacking according to the program to obtain a green body; and drying the green body, and sintering the dried green body to obtain the ceramic support body.
Further preferably, the ceramic support body is made of a ceramic raw material, and the ceramic raw material comprises the following components in percentage by weight: 90-95% of ceramic powder, 1-3% of sintering aid, 1-8% of pore-forming agent, 0.2-0.5% of plasticizer and 0.2-0.5% of lubricant; the ceramic powder is at least one of silicon carbide, aluminum oxide, zirconium oxide, titanium oxide, silicon dioxide and aluminosilicate, the sintering aid is at least one of kaolin, titanium dioxide, yttrium oxide, copper oxide and magnesium oxide, the pore-forming agent is at least one of graphite, starch, carbonate and wood powder, the plasticizer is at least one of hydroxypropyl methyl cellulose, carboxymethyl cellulose, lignocellulose and polyethylene, and the lubricant is at least one of glycerol and polyethylene glycol.
Further preferably, the film layer is prepared by the following method: uniformly mixing the film layer raw material and deionized water to obtain a film material, coating the obtained film material on the outer surface of the ceramic support body to form a wet film layer, and forming the film layer on the outer surface of the ceramic support body after sintering.
Still further preferably, the method of coating is any one of spraying, casting, dipping and ultrasonic spraying.
Further preferably, the raw materials of the film layer comprise the following components in percentage by weight: the film comprises 90-95% of a film main material, 0.1-0.5% of a surfactant, 1-5% of a sintering aid, 0.1-0.5% of a binder and 0.1-0.5% of a dispersing agent, wherein the film main material is at least one of silicon carbide, alumina, zirconia, titanium oxide, silicon dioxide, aluminosilicate, alumina sol, silica sol and titanium sol, the surfactant is at least one of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate and a silane coupling agent, the sintering aid is at least one of kaolin, potassium sodium feldspar, lithium feldspar and talc, the binder is at least one of polyvinyl alcohol, methyl cellulose, hydroxypropyl methyl cellulose and water glass, and the dispersing agent is at least one of polyacrylic acid, ammonium citrate and polyacrylamide.
In the invention, a plurality of drainage channels communicated with the central hole are arranged in the ceramic filter element single sheet, and during filtering, sewage enters the drainage channels after being sequentially filtered by the membrane layer and the ceramic support body and finally converges in the central hole. Because the membrane layer is arranged on the outer layer of the ceramic filter element single sheet, and micron-sized pores which are distributed in a honeycomb shape are distributed on the membrane layer and the ceramic support body which are formed by firing, the phenomenon that the drainage channel is blocked can not occur in the filtering process.
Preferably, the ceramic filter chip is of a cubic structure or a cuboid structure.
Preferably, the first end cover is provided with a first clamping groove matched with the ceramic filter element, the first end cover is further provided with a joint, the joint is of a hollow tubular structure and is communicated with the central hole, and external threads are arranged on the outer surface of the joint.
Preferably, one end of the ceramic filter chip is inserted into the first clamping groove, and the ceramic filter chip is bonded with the inner wall of the first clamping groove through an adhesive.
Preferably, the second end cover is provided with a second clamping groove matched with the ceramic filter element, the second end cover is further provided with a connector, the connector is communicated with the central hole, and the inner surface of the connector is provided with internal threads.
Further preferably, the ceramic filter chip is inserted into the second clamping groove, and the ceramic filter chip is bonded with the inner wall of the second groove through an adhesive.
Preferably, one end of the housing shell is connected to the first end cap by bonding or welding, and the other end of the housing shell is connected to the second end cap by bonding or welding.
In the invention, the material of the housing shell is selected from any one of plastic material, ceramic material and metal material, the material of the first end cover is selected from any one of plastic material, ceramic material and metal material, the material of the second end cover is selected from any one of plastic material, ceramic material and metal material, and the plastic material is at least one of ABS, PVC, PVDF, PE, PP and PEP.
Preferably, the thickness of the ceramic filter chip is 1.5-5mm, the height is 100-300mm, and the width is 20-50mm.
Compared with the prior art, the invention has the following beneficial effects:
(1) The ceramic array type filter element provided by the invention has the characteristics of high effective filtering area, high pollutant carrying capacity and capability of being repeatedly cleaned, and has excellent filtering performance:
the array type arrangement structure is combined with the ultrathin ceramic filter element sheets, so that the effective filtering area of unit volume can be greatly increased, compared with the traditional flat plate type filter element and single-tube ceramic filter element, the effective filtering area of the ceramic array type filter element provided by the invention is increased by tens of times, the ceramic array type filter element provided by the invention can be miniaturized, and further the filtering and separating requirements of various scenes are met.
(2) The ceramic array type filter element has the advantages of high temperature and strong alkali resistance and high flux, has wide application field and can be spliced:
the ceramic array type filter element has the advantages that the effective filtering area is large, the filter element can greatly expand the new field, the defect of low effective filtering area of the original outer side coating product is overcome, the advantages of the ceramic filter element are further embodied, the filter element product can replace the market share of partial organic filter elements, and the ceramic array type filter element has the advantages of similar effective filtering area to the existing organic filter element, larger flux, lower energy consumption, easier cleaning and longer service life; the ceramic array type filter element provided by the invention can meet the use requirements of extreme fields such as high temperature, high pressure, strong corrosivity, high-alkaline working environment and the like, and is beneficial to further expanding the application field of the filter element; in addition, the ceramic array type filter element is provided with the connector and the joint, and the splicing of a plurality of filter elements can be realized through the connector and the joint, so that the market demand can be further met.
(3) The miniaturized ceramic filter element sheet can effectively reduce the difficulty of the preparation process of the ceramic filter element, and realizes simplification of product preparation and enrichment of functional types.
Drawings
Fig. 1 is a front view of a ceramic array filter cartridge according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of a ceramic array filter cartridge according to an embodiment of the present invention;
FIG. 3 is a perspective view of a cartridge body provided in accordance with an embodiment of the present invention;
FIG. 4 is an enlarged view of portion A of FIG. 3;
FIG. 5 is a perspective view of a first end cap provided by an embodiment of the present invention;
FIG. 6 is a perspective view of a second endcap provided in accordance with an embodiment of the present invention;
fig. 7 is a schematic comparison of a filter cartridge body according to the present invention and a polypropylene pleated filter cartridge.
In the figure, 100-housing shell, 200-first end cap, 210-first neck, 220-connector, 300-second end cap, 310-second neck, 320-connector, 400-cartridge body, 410-ceramic filter element, 411-first ceramic plate, 412-second ceramic plate, 413-third ceramic plate, 414-ceramic spacer, 415-drainage channel, 420-central hole, 500-polypropylene pleated filter element.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples. It will be understood by those skilled in the art that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The reagents, methods and equipment adopted by the invention are conventional in the technical field if no special description is given.
Example 1
The embodiment provides a ceramic array type filter element, and the structure of the filter element is shown in figures 1-6. The ceramic array type filter element comprises a filter element body 400, an outer cover shell 100 is sleeved outside the filter element body 400, a first end cover 200 and a second end cover 300 are respectively arranged at two ends of the filter element body 400, the filter element body 400 is formed into an annular array structure by connecting a plurality of ceramic filter elements 410, and the annular array structure is provided with a central hole 420; the cross section of the central hole 420 is a regular polygon, and the side length of the regular polygon is the thickness of the ceramic filter chip 410.
The outer cover casing 100 is network structure, can screen out some large granule impurity, improves the holistic pollutant carrying capacity of filter core, prolongs the life of filter core, and in addition, network structure's outer cover casing 100 can also play support and guard action, can guarantee the holistic mechanical strength of filter core, can effectively avoid ceramic filter element 410 to damage.
The two adjacent ceramic filter chips 410 are connected through an adhesive, and the two adjacent ceramic filter chips 410 are connected through the adhesive, so that the sealing connection between the two adjacent ceramic filter chips 410 can be ensured. The ceramic filter chip 410 has a thickness of 1.5-5mm, a height of 100-300mm and a width of 20-50mm.
The first end cover 200 is provided with a first clamping groove 210 matched with the ceramic filter element piece 410, the first end cover 200 is further provided with a joint 220, the joint 220 is of a hollow tubular structure, the joint 220 is communicated with the central hole 420, and the outer surface of the joint 220 is provided with external threads.
The second end cap 300 is provided with a second clamping groove 310 matched with the ceramic filter element piece 410, the second end cap 300 is further provided with a connector 320 matched with the connector 220, the connector 320 is communicated with the central hole 420, and the inner surface of the connector 320 is provided with internal threads.
Through the structural design of interface 320 and joint 220, can realize the concatenation of a plurality of filter cores, be favorable to further satisfying market demand.
One end of the ceramic filter chip 410 is inserted into the first clamping groove 210 and is bonded to the inner wall of the first clamping groove 210 by an adhesive; the other end of the ceramic filter chip 410 is inserted into the second slot 310 and is bonded to the inner wall of the second slot 310 by an adhesive.
In the present invention, the material of the housing case 100 is selected from any one of plastic, ceramic and metal, the material of the first end cap 200 is selected from any one of plastic, ceramic and metal, and the material of the second end cap 300 is selected from any one of plastic, ceramic and metal, wherein the plastic is at least one of ABS, PVC, PVDF, PE, PP and PEP.
The key to the assembly process of ceramic array filter elements is that more membranes can be installed and positioned correctly. During assembly, an adhesive is applied to the edge of the ceramic filter element piece 410, one end of the ceramic filter element piece 410 is inserted into the second clamping groove 310 of the second end cap 300, the outer cover shell 100 is sleeved outside the filter element body 400, the other end of the ceramic filter element piece 410 is inserted into the first clamping groove 210 of the first end cap 200, and two ends of the outer cover shell 100 are connected with the first end cap 200 and the second end cap 300 respectively in an adhesive or welding manner.
The adhesive is selected from organic adhesive or inorganic adhesive. The inorganic adhesive is at least one of clay, glass and silicate. The organic adhesive is selected from at least one of organic silicone adhesive, polyurethane adhesive and epoxy resin adhesive. The inorganic adhesive is at least one of clay, glass and silicate. If an inorganic adhesive is used for bonding, heat treatment is required.
Example 2
The ceramic array filter element provided by the embodiment is an improvement on the basis of the embodiment 1, the technical content disclosed in the embodiment 1 is not repeatedly described in the embodiment, and the content disclosed in the embodiment 1 also belongs to the content disclosed in the embodiment.
As shown in fig. 4, the ceramic filter element 410 is a ceramic filter element single piece, the ceramic filter element single piece comprises a first ceramic plate 411, a second ceramic plate 412 and a third ceramic plate 413 which are sequentially connected, the first ceramic plate 411 and the third ceramic plate 413 are arranged in parallel, a plurality of ceramic partition plates 414 are arranged between the first ceramic plate 411 and the third ceramic plate 413, the ceramic partition plates 414 are arranged at equal intervals, a flow guide channel 415 is formed in the ceramic filter element single piece through the ceramic partition plates 414, and the flow guide channel 415 is communicated with the central hole 420.
Since the ceramic filter element single sheet is divided by the ceramic partition plates 414 to form the plurality of flow guide channels 415, the filter element body 400 formed by the ceramic filter elements 410 connected with each other is in a honeycomb shape.
The ceramic filter element piece 410 adopted in the embodiment has small thickness, and the honeycomb-shaped filter element body 400 is beneficial to enhancing the supporting strength of the ceramic filter element piece 410, so that the thickness of the filter element body 400 is reduced while the supporting strength of the filter element body 400 is ensured.
The ceramic filter element single sheet is processed by adopting the following method:
weighing the following ceramic raw materials in percentage by weight: the ceramic powder comprises 95% of ceramic powder, 3% of sintering aid, 1% of pore-forming agent, 0.5% of plasticizer and 0.5% of lubricant, wherein the ceramic powder is aluminum oxide, the sintering aid is potash albite, the pore-forming agent is starch, the plasticizer is carboxymethylcellulose, and the lubricant is polyethylene glycol.
Pouring ceramic raw materials and deionized water into a vacuum pug mill for pugging for 3 times, and then aging for 1 day to obtain pug for later use, wherein the deionized water accounts for 10 percent of the total weight of the ceramic raw materials; then, extruding and molding the pug by an extrusion molding machine to prepare a hollow honeycomb-shaped wet blank; drying the obtained wet blank in drying equipment, wherein hot air drying or microwave drying can be adopted to obtain a dry blank, and the water content of the obtained dry blank is ensured to be 0.1-0.3%; sintering the obtained dry blank at 1380 ℃ and preserving heat for 2 hours, and then cutting the dried blank by a water jet cutter or a diamond cutter to obtain a ceramic support body with a specified size; the ceramic support body formed by firing has micron-sized pores distributed in a honeycomb shape.
Weighing the following film layer raw materials in percentage by weight: the coating comprises, by weight, 98.7% of a main material of a film layer, 0.1% of a surfactant, 1% of a sintering aid, 0.1% of a binder and 0.1% of a dispersant, wherein the main material of the film layer is alumina, the surfactant is sodium dodecyl sulfate, the sintering aid is titanium dioxide, the binder is polyvinyl alcohol, and the dispersant is polyacrylic acid.
Film layer raw materials and deionized water are mixed according to the proportion of 1:1 to obtain a membrane material, casting the obtained membrane material to the outer surface of the ceramic support body to form a wet membrane with the thickness of 200nm to obtain a wet membrane blank, sintering the obtained wet membrane blank at 1200 ℃, keeping the temperature for 1 hour, forming a permeable membrane layer on the outer surface of the ceramic support body, and finally obtaining the ceramic filter element single sheet.
In this embodiment, the membrane layer is the outermost layer of the monolithic ceramic filter element, and the blockage of the drainage channel 415 is not generated during the filtration process.
Example 3
The present embodiment provides a ceramic array filter element, and the difference between the present embodiment and embodiment 2 is that the ceramic filter element single sheet of the present embodiment is processed by the following method:
weighing the following ceramic raw materials in percentage by weight: the ceramic powder comprises 90% of ceramic powder, 1.6% of sintering aid, 8% of pore-forming agent, 0.2% of plasticizer and 0.2% of lubricant, wherein the ceramic powder is aluminum oxide, the sintering aid is magnesium oxide, the pore-forming agent is starch, the plasticizer is carboxymethyl cellulose, and the lubricant is polyethylene glycol.
Pouring ceramic raw materials and deionized water into a vacuum pug mill for pugging for 5 times, and then aging for 2 days to obtain pug for later use, wherein the deionized water accounts for 30% of the total weight of the ceramic raw materials; then, extruding and molding the pug by an extrusion molding machine to prepare a hollow honeycomb-shaped wet blank; drying the obtained wet blank in drying equipment, wherein hot air drying or microwave drying can be adopted to obtain a dry blank, and the water content of the obtained dry blank is ensured to be 0.1-0.3%; sintering the obtained dry blank at 1350 ℃ and preserving heat for 2 hours, and then cutting by a water jet cutter or a diamond cutter to obtain a ceramic support body with specified size; the fired ceramic support body is provided with micro-nano pores distributed in a honeycomb shape.
Weighing the following film layer raw materials in percentage by weight: 93.5 percent of film layer main material, 0.5 percent of surfactant, 5 percent of sintering aid, 0.5 percent of binder and 0.5 percent of dispersant, wherein the film layer main material is alumina, the surfactant is sodium dodecyl sulfate, the sintering aid is potash albite, the binder is polyvinyl alcohol, and the dispersant is polyacrylic acid.
Film layer raw materials and deionized water are mixed according to the proportion of 1: (1-9) to obtain a membrane material, casting the obtained membrane material to the outer surface of the ceramic support body to form a wet membrane with the thickness of 200nm to obtain a wet membrane blank, placing the obtained wet membrane blank at 1150 ℃ for firing and keeping the temperature for 1h to form a water permeable membrane layer on the outer surface of the ceramic support body, and finally obtaining the ceramic filter element single sheet.
In this embodiment, the membrane layer is the outermost layer of the monolithic ceramic filter element, and the blockage of the drainage channel 415 is not generated during the filtration process.
Example 4
The present embodiment provides a ceramic array filter, which is different from embodiment 2 in that the ceramic filter element 410 of the present embodiment is formed by stacking two ceramic filter element single sheets with the same thickness, and the two ceramic filter element single sheets are bonded by an adhesive.
In this embodiment, the ceramic filter element single piece is processed by the following method:
weighing ceramic raw materials according to the embodiment 3, uniformly mixing the ceramic raw materials, and then granulating to obtain granulated powder with good fluidity, wherein the water content of the granulated powder is 4-7%, placing the granulated powder in a mold, then pressing by using a press to obtain a biscuit, placing the obtained biscuit in drying equipment for drying treatment, wherein hot air drying or microwave drying can be adopted to obtain a dry biscuit, and the water content of the obtained dry biscuit is ensured to be 0.1-0.3%; and (3) sintering the obtained dry blank at 1350 ℃, preserving heat for 2 hours, and cutting by a water cutter or a diamond cutter to obtain the ceramic support body with the specified size.
The film layer raw materials were weighed as in example 3: the raw materials of the film layer and deionized water are mixed according to the proportion of 1:1 to obtain a membrane material, casting the obtained membrane material to the outer surface of the ceramic support body to form a wet membrane with the thickness of 200nm to obtain a wet membrane blank, placing the obtained wet membrane blank at 1150 ℃ for firing and keeping the temperature for 1h, and forming a permeable membrane layer on the outer surface of the ceramic support body to finally obtain the ceramic filter element single sheet.
Example 5
The present embodiment provides a ceramic array filter element; the difference between the present embodiment and embodiment 2 is that the ceramic filter element single piece of the present embodiment is processed by the following method:
in this example, a support body of a ceramic filter element single piece is prepared by a 3D printing technique, and ceramic raw materials are calculated according to the following weight percentages: 90% of ceramic powder, 5% of sintering aid, 4.5% of pore-forming agent and 0.5% of wetting agent, and 20% of deionized water is additionally added, wherein the ceramic powder is aluminum oxide, the sintering aid is kaolin, the pore-forming agent is starch, the plasticizer is hydroxypropyl methyl cellulose, and the wetting agent is glycerol.
Uniformly stirring and mixing ceramic powder and deionized water, then putting the mixture into a kneading machine for sufficient kneading, putting the kneaded pug into a vacuum pug mill for pugging for 3 times, finally putting the pug into a closed container, and ageing the pug for 24 hours in a constant-temperature constant-humidity environment to obtain the plastic pug for later use.
The method comprises the steps of guiding a designed three-dimensional structure model of a ceramic filter element single chip into a 3D printer, slicing to obtain an executable program, loading prepared ceramic pug into a charging barrel of the extrusion type ceramic 3D printer, extruding the pug to a workbench through an extrusion nozzle through an extrusion screw, and superposing layer by layer according to the program to obtain a green body of the ceramic filter element single chip, wherein the diameter of the extrusion nozzle is 0.5mm, and the printing speed is controlled at 20mm/s; drying the green body at 80-120 ℃ for 3h; and then transferring the dried green body into a high-temperature box furnace, and carrying out high-temperature sintering according to a preset temperature program, wherein the preset temperature program is as follows: heating to 1400 ℃ at the heating rate of 5 ℃/min, and keeping the temperature for 2h; the atmosphere is air atmosphere, and finally the ceramic support is obtained.
The film layer raw materials were weighed as in example 3: the raw materials of the film layer and deionized water are mixed according to the proportion of 1:4 to obtain membrane slurry, spraying the obtained membrane slurry to the outer surface of the ceramic support body through electrostatic spraying to form a wet membrane with the thickness of 200nm to obtain a wet membrane blank, placing the obtained wet membrane blank at 1150 ℃ to be sintered and preserving heat for 1h, and forming a water permeable membrane layer on the outer surface of the ceramic support body to finally obtain the ceramic filter element single sheet.
Effect example 1
1. Ceramic filter elements were made according to the method of example 2, and then 24 ceramic filter elements were assembled into a filter element body 400 as shown in fig. 7 according to the method of example 1.
A prior art polyethylene sheet was used in accordance with the polyethylene pleated filter element 500 shown in fig. 7.
As can be seen in fig. 7, the effective filter area of the cartridge body 400 of the present invention is significantly greater than the polyethylene pleated cartridge 500.
2. Ceramic array type filter elements with the same size and specification are respectively manufactured according to the methods of the embodiments 2 to 5, and the temperature resistance test is carried out according to the following method: heating 10 ceramic array filter elements to 200 deg.C, and quenching with tap water; through observation, the quenched ceramic array filter element is not damaged and has no fracture phenomenon.
3. Ceramic filter elements of the same dimensions (same length, width and thickness) were produced as in examples 2 to 5, respectively, and the following tests were carried out as follows:
(1) The ceramic filter chip prepared by the method of the embodiment 2 to 5 is not processed, and the strength (namely the initial strength) of the ceramic filter chip is tested according to a GB/T6569-2006 fine ceramic bending strength test method (the adopted clamp is a three-point bending clamp);
(2) Testing alkali resistance and high temperature resistance: the ceramic filter element pieces prepared according to the methods of examples 2 to 5 were immersed in a sodium hydroxide solution having a mass concentration of 10%, heated and boiled in a closed vessel, kept in a boiling state for 8 hours, and then cooled to room temperature, and then the ceramic filter element pieces were taken out, and the strength (i.e., the final strength) of the ceramic filter element pieces taken out was measured according to the GB/T6569-2006 fine ceramic bending strength test method (the jig used was a three-point bending jig), and the strength change width = (initial strength-final strength)/initial strength = 100% was calculated according to the following formula.
(3) And (3) testing acid resistance and high temperature resistance: the ceramic filter element pieces prepared according to the methods of examples 2 to 5 were immersed in a hydrochloric acid solution having a mass concentration of 1%, heated and boiled in a closed container, kept in a boiling state for 8 hours, and then cooled to room temperature, and then the ceramic filter element pieces were taken out, and the strength (i.e., the final strength) of the ceramic filter element pieces taken out was measured according to the GB/T6569-2006 fine ceramic bending strength test method (the jig used was a three-point bending jig), and the strength change width = (initial strength-final strength)/initial strength = 100% was calculated according to the following formula.
The test results are shown in table 1.
TABLE 1
Through observation, after the acid-base and high-temperature resistant tests, the color and the luster of each ceramic filter chip have no obvious change, and the phenomenon of corrosion and blackening does not occur.
In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected" or "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The utility model provides a pottery array filter core, its characterized in that, includes the filter core body, the filter core body overcoat is equipped with the dustcoat casing, the both ends of filter core body are provided with first end cover and second end cover respectively, the filter core body is for forming annular array structure by a plurality of ceramic filter core piece connections, annular array structure has the centre bore.
2. The ceramic array filter of claim 1, wherein the central aperture has a cross-section of a regular polygon.
3. The ceramic array filter of claim 1, wherein the ceramic filter element comprises at least one ceramic filter monolith comprising a ceramic support and a membrane layer overlying the ceramic support.
4. The ceramic array filter of claim 3, wherein the ceramic filter element monolith comprises a first ceramic plate, a second ceramic plate and a third ceramic plate which are sequentially connected, the first ceramic plate and the third ceramic plate are arranged in parallel, a plurality of ceramic partition plates are arranged between the first ceramic plate and the third ceramic plate, the ceramic partition plates are arranged at equal intervals, a drainage channel is formed in the ceramic filter element monolith through the ceramic partition plates, and the drainage channel is communicated with the central hole.
5. The ceramic array filter of claim 3, wherein the ceramic support is manufactured by any one of extrusion, compression, and 3D printing.
6. The ceramic array filter element of claim 3, wherein the ceramic support comprises a ceramic material comprising, in weight percent: 90-95% of ceramic powder, 1-3% of sintering aid, 1-8% of pore-forming agent, 0.2-0.5% of plasticizer and 0.2-0.5% of lubricant.
7. The ceramic array filter of claim 3, wherein the membrane layer is prepared by a method comprising: uniformly mixing the film layer raw material and deionized water to obtain a film material, coating the obtained film material on the outer surface of the ceramic support body to form a wet film layer, and forming the film layer on the outer surface of the ceramic support body after sintering.
8. The ceramic array filter element according to claim 3, wherein the raw material of the membrane layer comprises the following components by weight percent: 90-95% of film main material, 0.1-0.5% of surfactant, 1-5% of sintering aid, 0.1-0.5% of binder and 0.1-0.5% of dispersing agent.
9. The ceramic array filter element according to claim 1, wherein the first cap is provided with a first locking groove adapted to the ceramic filter element, the first cap is further provided with a connector having a hollow tubular structure, the connector is communicated with the central hole, and the outer surface of the connector is provided with external threads.
10. The ceramic array filter of claim 1, wherein the ceramic filter element has a thickness of 1.5-5mm, a height of 100-300mm, and a width of 20-50mm.
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| CN202211300519.2A CN115646213A (en) | 2022-10-21 | 2022-10-21 | Ceramic array type filter element |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116768630A (en) * | 2023-05-22 | 2023-09-19 | 铜陵优必胜新材料科技有限公司 | Preparation method of microporous carbon-containing silicon carbide sealing element |
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2022
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116768630A (en) * | 2023-05-22 | 2023-09-19 | 铜陵优必胜新材料科技有限公司 | Preparation method of microporous carbon-containing silicon carbide sealing element |
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