CN102964124B - High-temperature gas-solid ceramic filter tube and preparation method - Google Patents
High-temperature gas-solid ceramic filter tube and preparation method Download PDFInfo
- Publication number
- CN102964124B CN102964124B CN201110001903.8A CN201110001903A CN102964124B CN 102964124 B CN102964124 B CN 102964124B CN 201110001903 A CN201110001903 A CN 201110001903A CN 102964124 B CN102964124 B CN 102964124B
- Authority
- CN
- China
- Prior art keywords
- temperature
- filter tube
- particle
- temperature gas
- ceramic filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Filtering Materials (AREA)
Abstract
The invention provides improvement of ceramic filter tubes for high-temperature gas purification, and is characterized in that a high-temperature binder for sintering comprises two or more than two of magnesium oxide, strontium oxide, calcium oxide, potassium oxide-containing minerals, kaolin or clay, and trace rare earth, and mainly forms a liquid-phase silicate high-temperature binder above 1200 DEG C. The contradiction between binding strength of a filter tube support body and filtration flux and resistance drop is well coordinated and solved; the obtained filter tube support body not only meets the requirements for transport, installation, and using strength, but also has a high filtration flux and low filtration resistance. When the filter tube has rupture strength of not less than 26 Mpa, and a filtration flux of 55 m3/hm2, the resistance drop is 850-950 pa or lower; the consistency for finished product batch production is good; and the performance difference is less than 10%.
Description
Technical field
The present invention is the improvement to high temperature gas cleaning ceramic filter tube, particularly relates to a kind of intensity good, the high temperature gas-solid separation ceramic filter tube of high flux, lower resistance and preparation method.
Background technology
Integral gasification combined circulation technology (IGCC), because heat utilization rate is high, soot emissions are almost 0 and are favored, such as, described in Chinese patent CN101880553A.Wherein coal combustion hot air cleaning high temperature gas-solid separation ceramic filter tube is wherein crucial and important core element.In this technique, ceramic filter tube is directly by coal gas of high temperature filtration, purification, requires that screen pipe is at 300-900 DEG C of hot operation, and has certain mechanical strength such as design strength P
folding>=24Mpa, do not rupture to meet in transportation, installation and use (especially pressure bounce-back cleans), and have good cold and hot acute degeneration, very high filtering accuracy (0.5 micron>=99.8%), especially gas flux wants large resistance drop little, requires gas filtration flux>=55m
3/ hm
2, pressure drop < 1000pa, if increase by 1% falls in filtration resistance, whole system energy consumption will increase by 1%, and comparatively large to system cloud gray model energy consumption, the horizontal pressure drop of current domestic technique is usually at about 1300pa.Aforementioned environment for use and requirement, make this screen pipe manufacture difficulty, much larger than other apply screen pipes usually, and objectively ceramic filter tube intensity and filtration flux and resistance inherently conflict, intensity is high, and filtration resistance will inevitably increase flux and reduce, and this is the contradiction being difficult to for a pair overcome, therefore industry technology personnel are making great efforts to overcome it, especially will reducing over chimney filter resistance drop as an emphasis research direction under proof strength.
The filter tube support body that can meet this filtering requirement in pottery has: silicon carbide material, mullite material, cordierite, silicon nitride material.Mullite heat-conductive characteristic is not as good as carborundum, and therefore cold and hot acute degeneration will lower than carborundum; Cordierite, firing temperature is on the low side, and high temperature mechanical strength is on the low side, and high temperature is not corrosion-resistant, is generally difficult to use in operating temperature >=600 DEG C and filters occasion; Silicon nitride, because granular size commodity are few, does not have production in enormous quantities raw material supply, raw material particle size needs user to prepare voluntarily, classification, thus adds manufacturing cost; Carborundum (SiC) wide material sources, granular size commercialized degree is high, cheap, has higher heat-conductive characteristic, and high mechanical strength and chemical stability are corrosion-resistant, and thermal-shock resistance is good, selection matter therefore.
The usual firing temperature of filter tube support body meeting aforementioned instructions for use is all greater than 1300 DEG C, and silicon carbide material at least will at 1350-1480 DEG C, otherwise be difficult to ensure applied at elevated temperature intensity.But SiC material weakness, be easily oxidized at 800-1200 DEG C, relatively loose oxide-film can be generated at particle surface in this temperature range, can not stop because this oxide-film is loose and continue oxidation, also can continue to be oxidized to deep layer; Secondly, in sintering process, high temperature makes particle surface be coated with silicate liquid phase, and this liquid phase accelerates to facilitate surface of SiC oxidation especially, thus makes SiC material screen pipe firing technology difficulty much larger than mullite, cordierite.In addition, the low melting point liquid-phase silicone hydrochlorate produced, not only between 800-1200 DEG C, liquid phase facilitates surface of SiC oxidation, and after 1200 DEG C, this part liquid phase exists also can block runner, this is confirmed in the test of applicant's firing temperature (firing temperature improves, and percent opening, rate of air circulation decline), although therefore goods have higher mechanical strength after burning till, but cause filtration flux to reduce, resistance is large.Prior art people are the liquid-phase silicone hydrochlorate forming cold state under avoiding burning till 800-1200 DEG C of temperature range, generally do not select containing PbO, B
2o
3, Na
2the silicate mineral that O equitemperature is lower makes binding agent, and adopts Al
2o
3the silicate binder such as kaolin that content is higher, but only keep self sintering state at this temperature range major part silicate binder, and lower with SiC particle surface cohesive force, cause product strength to reduce (Fig. 1).For ensureing certain mechanical strength, more binder content can only be taked make up, but excessive many binding agents can cause again binding agent to occupy ceramic skeleton particle and inter-particulate spaces, runner is narrowed diminish, and many binding agents form molecule attachment at SiC particle surface, make the runner that formed between skeleton particle rough, both all make granuloplastic micropore runner reduce, the coefficient of viscosity is large, and resistance is large, does not reach low filtration resistance index request; Besides, many binding agents also can make binding agent itself form micropore (Fig. 2), in use procedure, filtration resistance is cleaned with water after increasing, part water objectively can be caused to be adsorbed in binding agent microchannel, and dry run is after cleaning not easy to discharge, in use when temperature rises to more than water vapor temperature, the water expansion of this part, binding agent can be made to produce micro-crack, several times use cleaning crackle to expand and cause the fracture of screen pipe calamity.
Above-mentioned prior art shows particularly SiC material filter tube support body, filtration flux, resistance and burn till adhesion strength contradiction objective reality, and be difficult to overcome, find equalization point difficulty larger, be cause prior art to prepare SiC material screen pipe to be difficult to reach aforementioned IGCC technique high request, cause intensity index high, filtration flux and Drag Indices standard reduce, otherwise intensity index is affected.
Chinese patent CN1341578 prepares silicon carbide porous ceramic pipe method, adopts slip casting plaster mold moulding process, by regulating kind and the consumption of inorganic electrolyte, regulate the pH value of slurry in 8-12 scope, viscosity between 20-35mpas, proportion is at 1.3-1.5g/cm
3between; The porosity of porous ceramic pipe and pore size and distribution thereof is changed by changing firing temperature.But injection forming, due to pH value and mud particle size reason in slip casting process, objectively for large length (such as long 1000-2000mm) screen pipe product base substrate, often density difference is comparatively large up and down, makes lower deviation on strainability larger; Secondly, because injection forming plaster mold draws moisture content, base substrate central authorities density is poor, even forms layering, causes screen pipe mechanical strength to reduce; Besides, the injection forming production cycle is relatively long.In addition, injection forming is one side midge, greater density gradient is there is inside and outside base substrate self, and one side midge is often due to mud property and suction time, model water imbibition etc., batch production pipe thickness is caused to there is larger difference, thus cause goods strainability to produce larger difference, therefore spend the preparation of chimney filter large-scale production less employing slip casting plaster mold moulding process for greatly enhancing.Particularly unresolved for above-mentioned oxidizable and binding agent existing problems.
Chinese patent CN1714909 method for preparing ceramic filter tube for purifying high temperature gas, obtains ceramic filter tube by making oxide liquid-phase sintering agent → make with ceramic filter tube → makings mullite fiber film → film → sintering that SiC particle is main microstructure carrier.Adopt principal component 70 ~ 90%Al
2o
3, be aided with 3.5 ~ 4.5%SiO
2, 1.5 ~ 3%CaO, 0.5 ~ 2%MgO, 0 ~ 1.5%Y
2o
3, 0 ~ 1.5%ZrO
2, 0 ~ 1.5%B
2o
3, 0 ~ 1.5%TiO
2, sinter 2 hours in atmosphere with 1350 DEG C ~ 1450 DEG C temperature, obtained oxide liquid-phase sintering agent; Ceramic filter tube adopts particle diameter to be that SiC particle 35 ~ 45%, 1000 object SiC powder 3.5 ~ 4.5%, oxide liquid former 3.5 ~ 4.5%, potato powder 0.5 ~ 1.5%, the ion exchange water 35 ~ 45% of 250 ~ 350 microns is mixed and made into slurry, be poured into after plaster mold dry, obtained length be 1 ~ 1.5 meter, tubulose shaped support that external diameter 55 ~ 65 millimeters, wall thickness 8 ~ 12 millimeters of one end are closed.The shortcoming of above-mentioned employing injection forming still exists; Secondly, although by pre-burned for binding agent frit, can form liquidus temperature interval, technique relative complex by manual control binding agent, cost improves.
In addition, prior art prepares porous ceramics, mostly adopt the flour, active carbon, graphite etc. that self-strength is lower as pore creating material, this type of pore creating material is not owing to having self geometry and arigid size, in mud refining, pressure molding process easily and binding agent lump together, do not have independent occupy-place effect, burn after losing pore-creating and cause portion of binder to stick in silicon-carbide particle surface, occupying runner increases filtration resistance.And burn to lose and also can cause binding agent minimizing on site position between particle and particle, also can affect products machinery intensity.Therefore, test discovery through applicant, aforementioned pore creating material is also the very important factor affecting intensity and filtration resistance.
In addition, from formation of structure micropore and particle footpath choice relation, prior art is for meeting filtering accuracy requirement, micropore rule is formed according to particle, the ceramic coating (such as meeting IGCC filtration to use) of supporting body surface filtration, mostly adopt the general micro porous filtration layer method of preparation, select meso-position radius 34 microns particles as aggregate by this pore size filter.Relatively large osseous granules is relatively large at screen pipe surface area, and cause effective surface area shared by pore-forming to reduce, test only has about 20% usually, and relatively low microporosity, be also the another reason causing filtration resistance large.With regard to filtration resistance (pressure drop), desirable lower resistance screen pipe must be that supporter and surface micropore ceramic coating all have relatively low filtration resistance.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art, provides one better to coordinate supporter mechanical strength and filtration flux, resistance contradiction, has intensity high, the High-temperature gas-solid ceramic filter tube that filtration flux is large, filtration pressure drop is little.
Another object of the present invention is to the High-temperature gas-solid ceramic filter tube providing a kind of filtration resistance less.
Another object of the present invention is the High-temperature gas-solid ceramic filter tube preparation method providing a kind of above-mentioned high flux, low pressure drop.
The present invention first object realizes, applicant is by finding the reason that existing ceramic filter tube supporter intensity is low, filtration flux is little, resistance is large, main improvement is SiC, mullite, porous cordierite supporter, select to adopt and mainly after 1200 DEG C, form liquid phase and the relatively high binding agent mineral composition high temperature silicate binder of viscosity, thus reach and better coordinated sintered article adhesion strength and flux and resistance contradiction, overcome the deficiencies in the prior art, realize the object of the invention.Specifically, High-temperature gas-solid ceramic filter tube of the present invention, comprise by preparing the carborundum or mullite or cordierite particle and sintering binder that design average pore size, through extruded, the porous tubular support that sintering is formed, and the micropore ceramics coating on surface, is characterized in that sintering binder is containing magnesia, strontium oxide strontia, calcium oxide, potassium oxide mineral two kinds or more, with kaolin or clay and trace rare-earth mixing composition, after 1200 DEG C, mainly form the high-temperature agglomerant of liquid phase.
Before the detailed description, first by inventing the basic function that can reach and effect makes a presentation, one is had clearly to understand to make those skilled in the art to this patent general plotting technical scheme and the basic effect that reaches.
Because screen pipe maximum operating temperature of the present invention reaches 900 DEG C, thus enough elevated temperature strengths and high temperature rigid is needed, test shows that binding agent produces liquidus temperature and is greater than 1200 DEG C, effectively could ensureing screen pipe, the highest under 900 DEG C of environment, external force recoil is clean not easily deforms, and has comparatively ideal elevated temperature strength.And containing magnesia, strontium oxide strontia, calcium oxide, the fluxing mineral of potassium oxide, such as but not limited to talcum, dolomite, magnesite, marble, strontium carbonate, lime stone, potassic feldspar etc., they produce the temperature mostly > 1200 DEG C of liquid phase, thus effectively ensure that the adhesion strength that applied at elevated temperature is enough, and it is relatively high to form liquid phase viscosity, high viscosity makes Liquid phase flowability reduce, add and to use by usual binder amount, substantially many liquid phase blockings or attachment runner is not had, granuloplastic runner is made to keep smooth, better solve bonding mechanical strength and binding agent blocking thus, adhere to road phenomenon, better bonding mechanical strength and filtration resistance are coordinated, flux contradiction.Special in SiC material, decrease and have 800-1200 DEG C of temperature range the silicate liquid phase generation easily promoting SiC oxidation, thus also effectively overcome the oxidizable defect brought of SiC.Kaolin or clay, regulate mixed silicate binding agent liquid phase to produce temperature and viscosity for coordinating.Trace rare-earth is between 700-1200 DEG C, the oxide-film impelling surface of SiC to generate is densified, covers SiC particle surface, decreases at this temperature range SiC particle surface oxidative phenomena, nothing or less loose oxide-film produce, and improve the antioxygenic property of SiC material between 800 DEG C-1200 DEG C.The high temperature of above-mentioned composition produces liquid phase and relatively full-bodied high-temperature agglomerant, mainly form bonding (Fig. 3) at the particle node forming micropore, thus ensure that adhesion strength, make to burn till screen pipe and there is higher mechanical strength, high viscosity reduces mobility simultaneously, and do not need the amount of adding, make substantially can not block and/or adhere to runner, make granuloplastic runner smooth free from worry, thus there is lower filtration resistance, thus better coordinated sintered bond intensity and filtration flux, resistance contradiction, realize the object of the invention.
In the present invention.
Supporter pore-forming frame material, same prior art can be carborundum, also can be mullite, can also be cordierite, and they have high mechanical strength and anti-rapid heat cycle, is conducive to the stability ensureing screen pipe shape.The wherein more preferably carborundum that has concurrently of combination property and economy.For there being good pore structure, grain shape better adopts not containing flat or elongated piece (can pass through commercially available, or ball milling shaping obtaining).Selecting of mean particle size, depending on the requirement of filter tube support body aperture, prepares many micropores supporter determination particle diameter method by prior art and determines, such as design stay pipe average pore size 30-40 micron, average size of aggregate 180-250 micron, this belongs to prior art.
High-temperature agglomerant, be mainly used in making the inter-adhesive generation intensity of pore former particles, by containing magnesia, strontium oxide strontia, calcium oxide, potassium oxide mineral two kinds or more, with kaolin or clay and trace rare-earth composition, make it mainly after 1200 DEG C, form liquid phase, and formation liquid phase have relatively high viscosity (thickness liquid phase), bonds to particle, become vitreum after cooling, define mechanical strength.Its middle rare earth, can adopt the mishmetal of commercially available low price, and certain purification rare earth can be employed equally, its consumption with usually apply similar in pottery, for trace such as 0.2-0.5 divides, meet the demands.The consumption of binding agent, porous ceramics consumption is similar with usually preparing, such as, account for the 18-25wt% of total raw material amount.
For obtaining the less ceramic filter tube of filtration resistance, stay pipe surface ceramic coat skeleton particle, test is selected better to adopt to be less than Normal practice, such as IGCC process filtration pipe coating particle, select median to reduce to 10-25 micron by about 34 microns, add 5-10wt%Al (OH) in addition
3.Although ceramic coating particle footpath reduces, owing to have employed the labile Al of pyroprocess (OH)
3occupy-place when shaping, burns till decomposition at high temperature and leaves hole, although it is slightly biased little to make actual pore-forming adopt relative bulky grain to form hole compared with prior art, due to Al (OH)
3shaping occupy-place and high temperature burn mistake make porosity showed increased, can about 25% be reached after tested, thus make filtration resistance be able to further minimizing, filtration flux increase.
Supporter top layer ceramic coating particle, main pore-forming of only bearing filters barrier effect, therefore as prior art only need select the ceramic aggregate that melting does not occur in sintering process, such as conventional corundum, carborundum, mullite etc., the corundum that wherein better the commercialization of selection particle is good or silicon-carbide particle.
The said grain diameter of the present invention, state identical with usual ceramic process particle diameter, not refer to that whole particle is consistent size, but usually in normal distribution particle footpath form of presentation, and concrete particle diameter is determined to be required to determine by existing porous ceramics method of preparing by design aperture, and this is prior art for those skilled in the art.
Method for manufacturing high-temperature gas-solid separation of the present invention, comprise by carborundum or mullite or cordierite particles of aggregates and sintering binder and pore creating material, molding adhesive mixing is extruded, porous supporting body is obtained higher than 1300 DEG C of high temperature sinterings, apply ceramic size sintering and obtain filtering coatings, it is characterized in that sintering binder employing has containing magnesia, strontium oxide strontia, calcium oxide, potassium oxide mineral two kinds or more, with kaolin or clay and trace rare-earth mixing composition, the main high-temperature agglomerant forming liquid phase after 1200 DEG C, pore creating material is by comprising usual pore creating material and amount, be substantially equal to additional 3-5 part particle diameter the walnut shell particle designing average pore size to form.
Usual pore creating material used and amount in the inventive method, with existing to prepare porous ceramics pore creating material similar, be mainly used in occupy-place pore-forming, they are such as usually use the pore creating materials such as flour, active carbon, graphite, and/or possess pore-creating function and shaping auxiliary agent such as but not limited to methylcellulose, aluminum stearate, polyvinyl alcohol, yellow starch gum etc. simultaneously, it is similar that its consumption also prepares porous ceramics with prior art, such as prepare the 8-15wt% that IGCC screen pipe accounts for total amount, specifically determine depending on the requirement of design hole.
In the inventive method, the walnut shell particle that additional 3-5 part particle diameter is approximately equal to design average pore size is also comprised in pore creating material, because walnut shell particle not only has relatively high mechanical strength and rigidity, the ridge particle that particle diameter is less is equivalent to before burning till, can guarantee in mud refining, pressure forming process not broken, and absorb water (mud refining) afterwards volume expand change hardly, keep original-shape, keep former occupy-place volume, be conducive to control and the preparation in designing requirement aperture, and be bordering on spherical grain shape, after making to burn mistake, pore-forming is ideal.Occupy between skeleton particle in moulded pottery not yet put in a kiln to bake forming process simultaneously, high-temperature agglomerant is clamp-oned particle and intergranular site position spatial peripheral, burn after losing and both left ideal hole, high-temperature agglomerant is made again to be connected on the site position of particle and particle, the unobstructed adhesion strength of runner is improved, overcomes the deficiency of existing employing low-intensity pore creating material.Walnut shell particle particle diameter is selected, roughly similar with required pore-forming aperture, such as IGCC filter tube support body of the present invention, selects 260-400 order particle diameter walnut shell particle.
In addition, for being conducive to shaping bonding, part molding adhesive material is also added with prior art.Extruded also same prior art, these are prior art, and those skilled in the art can understand, repeat no more.
IGCC filter tube support body composition and ratio of the present invention and ceramic for filtration coating proportioning, respectively in table 1, table 2.
In supporter composition, aluminum stearate, hydroxypropyl methylcellulose, polyvinyl alcohol, both as pore creating material, are also molding adhesives simultaneously.
In ceramic for filtration coating: emergy W
14for face coat aggregate, bentonite, potassic feldspar, white glass powder are high-temperature agglomerant; Carboxymethyl cellulose, corrosive acid sodium are mud auxiliary material, AL (OH)
3for pore former.
High-temperature gas-solid ceramic filter tube of the present invention and manufacture method, relative to prior art, owing to improving supporter high-temperature agglomerant, select to adopt and mainly after 1200 DEG C, form liquid phase and the relatively high high-temperature agglomerant of viscosity, and reduce ceramic for filtration coating granule size, additional 5-10wt%Al (OH)
3with the additional 3-5 part walnut shell particle pore creating material of employing.Not only better coordinate to solve filter tube support body adhesion strength and filtration flux and resistance drop contradiction, gained filter tube support body had both had satisfied transport, installation, instructions for use intensity, binding agent does not block runner again, also adhered particles is not surperficial, thus form runner smooth, have compared with high filtration flux and low filtration resistance.Increase rigidity walnut shell particle pore creating material, stable particle shape, burn to lose and form that micropore is constant is equivalent to former occupy-place volume micropore, and make the more and particle bond of binding agent, ensure that enough adhesion strengths.Gained supporter intensity P
anti-folding>=26MPa, than existing product height 2MPa, the porosity reaches 34-38%, than prior art products height 3-6%.Filtration ceramic coating, more similarly reduces particles of aggregates footpath, and adopts a small amount of AL (OH)
3micro mist, high temperature burns till sloughs constitution water formation AL
2o
3, leave space and form micropore, with particles of aggregates (such as W
14corundum) coordinate and form 8-10 micrometer Millipore, surface spraying layer thickness 20-25 μm, more traditionally do not add AL (OH)
3form micropore little and many, the little 1-2 μm of more similar best product, the porosity is up to 30-32%, and surface filtration hole effective area increases, thus adds gas filtration area, also promotes filtration resistance reduction.Screen pipe of the present invention, rupture strength>=26Mpa, filtration flux 55m
3/ hm
2time, resistance reduces to 850-950pa or lower, has high mechanical strength and low filtration resistance (pressure drop) simultaneously, is better than existing domestic report best level, and finished product batch production uniformity is good, and performance difference is less than 10%.Because filtering micropore aperture is reduced, filtering accuracy improves, and also helps and reduces filter dust to the blocking of micropore, can also extend life cycle and life-span.The inventive method, can not only be used for the manufacture of high temperature gas-solid separator tube, can also be used for the manufacture with similar operating mode screen pipe.Stay pipe of the present invention can differentiate binding agent by Tonghua Epidemiological Analysis, and mainly can be bondd (Fig. 3) on particle node by crystalline phase photo display binding agent, can be different from the screen pipe that other prior aries manufacture.
Below in conjunction with three specific embodiments; essence of the present invention is understood in exemplary illustration and help further; but embodiment detail is only in order to the present invention is described; do not represent the present invention and conceive lower whole technical scheme; therefore should not be construed as the technical scheme total to the present invention to limit, some are In the view of technical staff, and the unsubstantiality not departing from the present invention's design increases and/or changes; such as simply change with the technical characteristic with same or similar technique effect or replace, all belonging to scope.
Accompanying drawing explanation
Fig. 1 is SiC supporter crystalline phase photo prepared by prior art, the non-melting of display binding agent.
Fig. 2 is SiC supporter crystalline phase photo prepared by prior art, and display binding agent too much occupies runner, and inner formation micropore.
Fig. 3 is SiC supporter crystalline phase photo prepared by the present invention, and the melting of display binding agent, mainly bond at particle and particle node, binding agent inside is not containing micro-pore, and runner is smooth.
Detailed description of the invention
Embodiment: preparation method is identical with usually preparing porous filtering pipe method, first preparation supports body, sintering, then adopts leaching or spraying to apply coating, again sinters.
Prepared by supporter: by embodiment table, weigh batching → mixing pugging (making plastic mud material) → extruded → drying → burn till (1350-1400 DEG C, insulation 4-6 hour), obtain average pore size 30-40 micrometer silicon carbide silicon material porous tubular support.Wherein, silicon-carbide particle average grain diameter 200-250 μm, walnut shell particle material 260-400 order, binding agent mineral material≤300 order, polyvinyl alcohol is 1:9 glue liquid.
Prepared by ceramic capillary coating: by embodiment table, weigh batching → mixing and ball milling (obtain stable and the suspension that is uniformly dispersed) → spraying or dip-coating (coating layer thickness 20-25 micron) → drying → burn till (1260 DEG C-1280 DEG C, insulation 3-4 hour), obtain the filtering coatings that average pore size is 8-10 micron.
To those skilled in the art, under this patent design and specific embodiment enlightenment, some distortion that can directly derive from this patent disclosure and general knowledge or associate, those of ordinary skill in the art will recognize also can adopt additive method, or in prior art, commonly use substituting of known technology, and the equivalence of feature changes or modifies, mutual various combination between feature, such as supporter frame material also can adopt mullite or cordierite, ceramic coating also can adopt other high temperature resistant frame materials, binding agent Mineral change, etc. unsubstantiality change, can be employed equally, this patent representation function and effect can be realized, expansion of illustrating no longer is one by one described in detail, all belong to this patent protection domain.
Claims (7)
1. High-temperature gas-solid ceramic filter tube, comprise by preparing the carborundum or mullite or cordierite particle and sintering binder that design average pore size, through extruded, the porous tubular support that sintering is formed, and the micropore ceramics coating of open support tube-surface, it is characterized in that sintering binder is containing magnesia, strontium oxide strontia, calcium oxide, potassium oxide mineral more than two kinds, with kaolin or clay and trace rare-earth mixing composition, after 1200 DEG C, form the high-temperature agglomerant of liquid phase, screen pipe maximum operating temperature reaches 900 DEG C; Stay pipe average pore size 30-40 micron, adopts average size of aggregate 180-250 micron; High-temperature agglomerant consumption accounts for the 18-25wt% of total raw material amount.
2. High-temperature gas-solid ceramic filter tube according to claim 1, is characterized in that grain shape is not containing flat or elongated piece.
3. High-temperature gas-solid ceramic filter tube according to claim 1, is characterized in that stay pipe surface ceramic coat skeleton particle median 10-25 micron, additional 5-10wt%Al (OH)
3.
4. High-temperature gas-solid ceramic filter tube according to claim arbitrary in claims 1 to 3, is characterized in that screen pipe rupture strength>=26Mpa, filtration flux 55m
3/ hm
2time, resistance reduces to 850-950pa.
5. method for manufacturing high-temperature gas-solid separation, comprise by carborundum or mullite or cordierite particles of aggregates and sintering binder and pore creating material, molding adhesive mixing is extruded, porous supporting body is obtained higher than 1300 DEG C of high temperature sinterings, apply ceramic size sintering and obtain filtering coatings, it is characterized in that sintering binder employing has containing magnesia, strontium oxide strontia, calcium oxide, potassium oxide mineral more than two kinds, with kaolin or clay and trace rare-earth mixing composition, the high-temperature agglomerant of liquid phase is formed after 1200 DEG C, screen pipe maximum operating temperature reaches 900 DEG C, pore creating material is by comprising usual pore creating material and amount, the walnut shell particle equaling to design average pore size with additional 3-5 part particle diameter forms.
6. method for manufacturing high-temperature gas-solid separation according to claim 5, is characterized in that walnut shell particle average grain diameter 260-400 order.
7. method for manufacturing high-temperature gas-solid separation according to claim 5 or 6, is characterized in that supporter firing temperature 1350-1400 DEG C, coating firing temperature 1260 DEG C-1280 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110001903.8A CN102964124B (en) | 2011-01-07 | 2011-01-07 | High-temperature gas-solid ceramic filter tube and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110001903.8A CN102964124B (en) | 2011-01-07 | 2011-01-07 | High-temperature gas-solid ceramic filter tube and preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102964124A CN102964124A (en) | 2013-03-13 |
| CN102964124B true CN102964124B (en) | 2015-02-11 |
Family
ID=47794595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110001903.8A Expired - Fee Related CN102964124B (en) | 2011-01-07 | 2011-01-07 | High-temperature gas-solid ceramic filter tube and preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102964124B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107973603A (en) * | 2016-10-24 | 2018-05-01 | 日本碍子株式会社 | The manufacture method of porous material, honeycomb structured body and porous material |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103739303B (en) * | 2013-12-31 | 2015-04-01 | 南京工业大学 | Gas-solid separation ceramic material and preparation method thereof |
| WO2016147488A1 (en) * | 2015-03-16 | 2016-09-22 | 三井金属鉱業株式会社 | Porous body, porous bonded body, filtration filter for molten metals, jig for firing, and method for producing porous body |
| CN108178655A (en) * | 2016-12-08 | 2018-06-19 | 辽宁法库陶瓷工程技术研究中心 | A kind of method added pore creating material technique and prepare silicon carbide ceramic filter |
| CN106731240B (en) * | 2017-02-08 | 2018-09-11 | 无锡工艺职业技术学院 | A kind of ceramic base effluent filter |
| CN108395252A (en) * | 2018-01-26 | 2018-08-14 | 山东理工大学 | Liquid-phase sintering multichannel silicon carbide ceramic support body and preparation method thereof |
| CN108905377B (en) * | 2018-07-19 | 2022-03-08 | 江苏开创环保科技有限公司 | Preparation method of high-temperature ultrafine dust filter tube |
| CN111389102B (en) * | 2020-03-30 | 2021-11-30 | 济南大学 | Full-particle ceramic bonding filter and preparation method thereof |
| CN113582703A (en) * | 2021-07-01 | 2021-11-02 | 盐城工学院 | Method for preparing porous silicon nitride ceramic based on walnut shells |
| CN114392609A (en) * | 2021-12-30 | 2022-04-26 | 安徽工业大学 | Preparation method and application of dedusting, desulfurization and denitration integrated double-layer mullite ceramic filter material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1341578A (en) * | 2001-08-17 | 2002-03-27 | 中国科学院上海硅酸盐研究所 | Method for preparing silicon carbide porous ceramic pipe |
| CN1714909A (en) * | 2005-05-11 | 2006-01-04 | 青海大学 | Method for preparing ceramic filter tube for purifying high temperature gas |
| CN1821180A (en) * | 2005-02-18 | 2006-08-23 | 贵州新材料矿业发展有限公司 | Method for preparing recrystallized SIC high temperature gas filter element |
| CN101880553A (en) * | 2010-06-22 | 2010-11-10 | 沈阳航空航天大学 | Integrated medium-high temperature coal gas purification method and device suitable for coal-based gas |
-
2011
- 2011-01-07 CN CN201110001903.8A patent/CN102964124B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1341578A (en) * | 2001-08-17 | 2002-03-27 | 中国科学院上海硅酸盐研究所 | Method for preparing silicon carbide porous ceramic pipe |
| CN1821180A (en) * | 2005-02-18 | 2006-08-23 | 贵州新材料矿业发展有限公司 | Method for preparing recrystallized SIC high temperature gas filter element |
| CN1714909A (en) * | 2005-05-11 | 2006-01-04 | 青海大学 | Method for preparing ceramic filter tube for purifying high temperature gas |
| CN101880553A (en) * | 2010-06-22 | 2010-11-10 | 沈阳航空航天大学 | Integrated medium-high temperature coal gas purification method and device suitable for coal-based gas |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107973603A (en) * | 2016-10-24 | 2018-05-01 | 日本碍子株式会社 | The manufacture method of porous material, honeycomb structured body and porous material |
| CN107973603B (en) * | 2016-10-24 | 2021-12-31 | 日本碍子株式会社 | Porous material, honeycomb structure, and method for producing porous material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102964124A (en) | 2013-03-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102964124B (en) | High-temperature gas-solid ceramic filter tube and preparation method | |
| CN107010968B (en) | High-strength light-weight corundum-mullite refractory aggregate and preparation method thereof | |
| CN101948316B (en) | Preparation method of ceramic filtration supporter | |
| CN106220224B (en) | High-temperature-resistant light heat-insulating material with double-hole structure and preparation method thereof | |
| CN100358839C (en) | Ltigh crystalline structure iolite mullite kiln, kiln refractory product and calcining technology | |
| CN101412620A (en) | Method for preparing porous alumina ceramic supporting body with sol as additive | |
| US20100310819A1 (en) | Aluminum-titanate-based ceramic honeycomb structure, its production method, and starting material powder for producing same | |
| CN105130441A (en) | Silicon carbide ceramic membrane and preparation method thereof | |
| CN101318808B (en) | Porous ceramic supporting body for high-strength inorganic separation film | |
| CN101492276A (en) | Novel clay soil polyporous materials and method of producing the same | |
| CN108484149A (en) | A kind of NaA molecular sieve film support preparation method | |
| CN101537314A (en) | Filter tube support body material for microporous inorganic separating film and synthesizing method thereof | |
| WO2013086664A1 (en) | High crystal mullite-cordierite high temperature industrial ceramic and manufacturing method thereof | |
| CN105130468A (en) | Refractory heat insulation material and preparation method thereof | |
| CN103253935B (en) | Automobile exhaust Al2TiO5/SiC porous composite material and preparation method thereof | |
| CN113087492A (en) | Sintered water permeable brick prepared from iron tailings and preparation method thereof | |
| CN105688684B (en) | With three gradient pore structured pure matter foam silicon carbon supporter membrane tubes and preparation method | |
| CN105727756B (en) | A kind of pair of gradient pore structured Sialon silicon carbide membrane tube and preparation method thereof | |
| CN101712561A (en) | Method for preparing SiC porous ceramic by splicing clay | |
| CN101492302A (en) | Composite brick for shaft kiln and method of producing the same | |
| CN108017397A (en) | Refractory brick containing quartz sand and preparation method thereof | |
| CN113880603A (en) | Porous ceramic composition and preparation method thereof | |
| CN102210954B (en) | Solid-liquid separation composite filter board and preparation method thereof | |
| CN102442833B (en) | Preparation process and application of novel foam ceramic material | |
| CN101747066A (en) | Lip tile and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150211 Termination date: 20180107 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |