CN110451980A - A kind of preparation method of the enhanced ceramic high temperature flue gas filter pipe of flange neck - Google Patents
A kind of preparation method of the enhanced ceramic high temperature flue gas filter pipe of flange neck Download PDFInfo
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- CN110451980A CN110451980A CN201910868052.3A CN201910868052A CN110451980A CN 110451980 A CN110451980 A CN 110451980A CN 201910868052 A CN201910868052 A CN 201910868052A CN 110451980 A CN110451980 A CN 110451980A
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- Prior art keywords
- ceramic
- high temperature
- neck
- flue gas
- flange
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- 239000000919 ceramic Substances 0.000 title claims abstract description 236
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 239000003546 flue gas Substances 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 30
- 239000000843 powder Substances 0.000 claims abstract description 22
- 239000000428 dust Substances 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000001914 filtration Methods 0.000 claims abstract description 9
- 229910052571 earthenware Inorganic materials 0.000 claims abstract description 3
- 229920002635 polyurethane Polymers 0.000 claims abstract description 3
- 239000004814 polyurethane Substances 0.000 claims abstract description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 28
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 28
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 22
- 229910052863 mullite Inorganic materials 0.000 claims description 22
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 19
- 239000012752 auxiliary agent Substances 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 15
- 239000000835 fiber Substances 0.000 claims description 15
- 229910052799 carbon Inorganic materials 0.000 claims description 14
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical group [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 13
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 11
- 239000000779 smoke Substances 0.000 claims description 8
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 7
- 229910052878 cordierite Inorganic materials 0.000 claims description 7
- 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 claims description 7
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 7
- 239000011812 mixed powder Substances 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 4
- 238000005245 sintering Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 14
- 238000000465 moulding Methods 0.000 abstract description 8
- 238000000746 purification Methods 0.000 abstract description 3
- 238000009825 accumulation Methods 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 abstract 2
- 210000003739 neck Anatomy 0.000 description 67
- 238000005453 pelletization Methods 0.000 description 23
- 238000000462 isostatic pressing Methods 0.000 description 14
- 238000007873 sieving Methods 0.000 description 13
- 239000002245 particle Substances 0.000 description 12
- 239000007789 gas Substances 0.000 description 9
- 238000001816 cooling Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 7
- 238000012856 packing Methods 0.000 description 7
- 238000010792 warming Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 239000000320 mechanical mixture Substances 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000010998 test method Methods 0.000 description 4
- 235000019504 cigarettes Nutrition 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 230000003026 anti-oxygenic effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000011538 cleaning material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012956 testing procedure Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
- B01D39/2068—Other inorganic materials, e.g. ceramics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0001—Making filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2411—Filter cartridges
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
- C04B35/565—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/64—Burning or sintering processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/10—Filtering material manufacturing
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6562—Heating rate
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/66—Specific sintering techniques, e.g. centrifugal sintering
- C04B2235/661—Multi-step sintering
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
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- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
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- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geometry (AREA)
- Filtering Materials (AREA)
Abstract
The invention discloses a kind of preparation methods of the enhanced ceramic high temperature flue gas filter pipe of flange neck, belong to porous ceramic film material preparation field.The ceramic high temperature flue gas filter pipe includes ceramic pipe flange, ceramic tube neck and ceramic tube body, ceramic tube neck and ceramic tube contact level are circular slanting zigzag, this method are as follows: one, be added mixing fine powders in polyurethane mould, obtain ceramic pipe flange and ceramic tube neck precompressed body；Two, it is pressed with sawtooth round tube, mixing coarse powder is then added and fills up, and molding obtains earthenware green compact in cold isostatic press；Three, green compact are put into high temperature furnace and are sintered to obtain ceramic high temperature flue gas filter pipe.Ceramic pipe flange and neck mainly play fixed and load-bearing effect in the present invention, ceramic tube body plays the role of high-temperature dust-containing flue gas filtration, purification, the present invention solves ceramic high temperature flue gas filter pipe in application process, because of airflow fluctuation, blowback frequently, the reasons such as dust bridge, dust accumulation, the problem of causing ceramic filter tube neck to be broken.
Description
Technical field
The present invention relates to a kind of preparation methods of the enhanced ceramic high temperature flue gas filter pipe of flange neck, belong to porous ceramics
Preparation field.
Background technique
Porous ceramic film material has many advantages, such as that density is low, corrosion-resistant, mechanical strength is big, high temperature resistant and corrosion-resistant, in Shui Chu
It is widely used in terms of reason and gas purification.Compared with porous metal material, under high-temperature corrosion environment, porous ceramic film material
With better anti-gas attack and antioxygenic property, it is considered to be ideal high temperature gas cleaning material.
Currently, the porous ceramics configuration of high temperature gas cleaning is unified for candle shape formula, mainly by flange, neck and tube body three
Part composition (structure is as shown in Figure 1), ceramic filter pipe flange, neck and the tube body of this configuration are all identical aggregate sizes
It is prepared, therefore the parameters such as the porosity of these three parts, aperture, intensity and permeability are almost the same.And it is generally used for
The porous ceramic support material of gas solid separation needs aperture big and porosity height, to provide enough gas transit doses, but this
The neck intensity for also resulting in porous ceramic pipe is not high, is easy under frequent blowing, high-temperature corrosion environment and in long-term use process
There is radial fragmentation at flange neck, entire filter plant is caused not to be available.Therefore, traditional porous ceramics membrane tube structure is difficult
To meet modern industry use demand, how to change existing traditional ceramic filter tube structure, increases the ceramics under hot environment
Tube neck intensity reduces risk of breakage, and ceramic membrane technology will be greatly increased in high temperature gas cleaning field by improving service life
Using scale.
Summary of the invention
Present invention seek to address that the technical issues of be in view of the deficiencies of the prior art, it is enhanced to provide a kind of flange neck
The preparation method of ceramic high temperature flue gas filter pipe.The preparation method improves the mechanical strength of ceramic pipe flange and neck, solves
Ceramic high temperature flue gas filter pipe in application process, because of airflow fluctuation, blowback frequently, the reasons such as dust bridge, dust accumulation,
The problem of causing ceramic filter tube neck to be broken, extends ceramic filter tube and uses the longevity under high temperature and pressure complexity flue gas operating condition
Life.
In order to solve the above technical problems, the technical solution used in the present invention is:
A kind of preparation method of the enhanced ceramic high temperature flue gas filter pipe of flange neck, the enhanced ceramic high temperature cigarette of the flange neck
Gas screen pipe includes three ceramic pipe flange, ceramic tube neck and ceramic tube body parts, the ceramic pipe flange (1), ceramics
Tube neck (2) and ceramic tube body (3) are same material, formula used in the ceramics pipe flange (1) and ceramic tube neck (2)
Aggregate size is identical, and the ceramics tube body (3) and ceramic pipe flange (1) and ceramic tube neck (2) formula aggregate size used are not
Together, the ceramic pipe flange (1), ceramic tube neck (2) and ceramic tube body (3) are that gradient loads one-pass molding, the ceramic tube
Neck (2) and ceramic tube body (3) contact surface are the oblique zigzag of ring.
The preparation method comprises the steps of:
One, the mixed powder that ceramic fine powder is aggregate is added in polyurethane mould, obtains ceramic pipe flange (1) and ceramic neck
Portion (2) pre- laminate；
Two, it is pressed with the oblique sawtooth round tube in end face, then proceedes to be added using ceramic coarse powder as the mixed powder of aggregate, and vibrate
It tamps until die cavity is full of, then ceramic tube body (3) the pre- laminate of acquisition forms to obtain ceramic tube life in cold isostatic press mesohigh
Base；
Three, earthenware green compact is put into high temperature furnace and is sintered, and finally obtains the enhanced ceramic high temperature flue gas filter pipe of flange neck.
The ceramic aggregate is silicon carbide, silicon nitride, mullite or cordierite.
Ceramics fine powder aggregate size used in the ceramic pipe flange (1) and ceramic tube neck (2) is 10-50 μm.
Ceramics coarse powder aggregate size used in the ceramic tube body (3) is 200-300 μm.
The mixed powder main component group becomes 72-84 parts of ceramic aggregate, burns 1-3 part of auxiliary agent, 5-10 parts of adhesive
With 10-15 parts of pore creating material.
The cold isostatic press briquetting pressure is 120-180 MPa.
The high temperature sintering temperature is 1200-1400 oC.
The burning auxiliary agent composition is mainly MgO, CaO, ZrO2And mullite fiber.
The adhesive is mainly the polyvinyl alcohol water solution or cmc soln of 5 wt%, and pore creating material is carbon
Powder.
In the present invention, the measurement of porosity and flexural strength parameter is with the following method:
1. Archimedes's drainage that the test method of porosity uses, using deionized water as immersion medium.
Specific steps refer to standard GB/T/T 1966-1996(National Standard of the People's Republic of China, and porous ceramics is aobvious
The porosity, Capacity Test Method).
2. bending strength test method formula surveys the average value of its 3 bending strengths, span using bending strength test instrument
40 mm, 0.5 mm/min of loading velocity.Specific testing procedure refers to standard GB/T/T1965-1996(People's Republic of China (PRC)
National standard, porous ceramics anti-reflecting bending strength test method).
The utility model has the advantages that
1. preparation process of the present invention is simple, production procedure is short, of less demanding to production equipment, is suitble to large-scale industrial production.
2. ceramic high temperature flue gas filter pipe porosity prepared by the present invention reaches 40-50 %, there is good permeability,
99.9 % or more are reached to the rejection of PM2.5.
3. preparation method of the present invention overcome in the prior art ceramic filter tube during high-temperature flue gas purification because of neck
Ceramic tube neck breakage problem, is loaded by different-grain diameter powder gradient and is sintered caused by load is excessive, reinforces ceramic tube neck
With the oblique zigzag occlusion of ring of ceramic tube contact level, there is ceramic pipe flange and neck more higher than ceramic tube body mechanical strong
Degree extends service life of the material under high temperature, high pressure and strong corrosive environment.
Detailed description of the invention
Attached drawing 1 is the ceramic high temperature flue gas filter pipe structural schematic diagram of prior art preparation.
Attached drawing 2 is ceramic high temperature flue gas filter pipe structural schematic diagram prepared by the embodiment of the present invention 2.
Attached drawing 3 is the structural schematic diagram of ceramic tube neck and ceramic tube contact level in the embodiment of the present invention 2.
Attached drawing 4 is the micro-structure diagram of ceramic tube neck and ceramic tube contact level in the embodiment of the present invention 2.
Description of symbols: 1-ceramic pipe flange；2-ceramic tube necks；3-ceramic tube bodies.
Specific embodiment
The present invention is done below with reference to embodiment and is further explained, the following example is merely to illustrate the present invention, but
It is not used to limit practical range of the invention.
Embodiment 1
As shown in Figure 1, the ceramic high temperature flue gas filter pipe of this example preparation includes: ceramic pipe flange 1, ceramic tube neck 2 and pottery
Porcelain tube body 3, the ceramic pipe flange 1, ceramic tube neck 2 and ceramic tube body 3 are using silicon carbide as aggregate.Prepare ceramics height
The method of warm flue gas filter pipe the following steps are included:
Step 1: by 72 parts 300 μm of average grain diameter of SiC, 15 parts 20 μm of average grain diameter of carbon dust, 3 parts of 5 μ of average grain diameter
Burning auxiliary agent (MgO, CaO, ZrO of m21/4 weight is respectively accounted for mullite fiber) it weighs be put into three-dimensional mixer respectively, machinery is mixed
Close 24 h, be added after taking-up 10 parts of polyvinyl alcohol water solution (i.e. PVA, mass concentration be 5 %) that mass percent is 5 % in
30 min are stirred in high-speed mixer, relative rotation speed is 1000 r/min, then obtains pelletizing by shaking-sieving.
Step 2: pelletizing is packed into mold in a manner of jolt-packing, then seal it is intact be put into isostatic pressing machine at
Type obtains ceramic tube green body, and isostatic pressing pressure is 120 MPa, 60 s of dwell time.
24 h are dried Step 3: green body is put into the baking oven of 70 oC, are finally putting into Muffle furnace, heating rate 2
OC/min to 500 oC keeps the temperature 2 h, then is warming up to 900 oC with 2 oC/min, is then heated to 1400 o with 1 oC/min
4 h are kept the temperature under C, obtain ceramic high temperature flue gas filter pipe after cooling.
After tested, ceramic high temperature smoke filtration pipe flange manufactured in the present embodiment, three parts of neck and tube body hole
Rate is 42 %, and the intensity of three parts is mutually all 18.7 MPa.
Embodiment 2
As shown in Fig. 2, the ceramic high temperature flue gas filter pipe of this example preparation includes: ceramic pipe flange 1, ceramic tube neck 2 and pottery
Porcelain tube body 3, the ceramic pipe flange 1, ceramic tube neck 2 and ceramic tube body 3 are silicon carbide material, wherein ceramic pipe flange
1 and ceramic tube neck 2 thin carborundum aggregate particle, the thick carborundum aggregate particle of ceramic tube body 3.Prepare the ceramic high temperature cigarette
The method of gas screen pipe the following steps are included:
Step 1: by 72 parts 50 μm of average grain diameter of SiC, 15 parts 5 μm of average grain diameter of carbon dust, 3 parts 5 μm of average grain diameter
Burning auxiliary agent (MgO, CaO, ZrO21/4 weight is respectively accounted for mullite fiber) it weighs be put into three-dimensional mixer respectively, machinery is mixed
Close 24 h, be added after taking-up 10 parts of polyvinyl alcohol water solution (i.e. PVA, mass concentration be 5 %) that mass percent is 5 % in
30 min are stirred in high-speed mixer, relative rotation speed is 1000 r/min, then obtains pelletizing 1 by shaking-sieving.
Step 2: by 72 parts 300 μm of average grain diameter of SiC, 15 parts 20 μm of average grain diameter of carbon dust, 3 parts of average grains
5 μm of diameter burning auxiliary agent (MgO, CaO, ZrO21/4 weight is respectively accounted for mullite fiber) respectively weigh be put into three-dimensional mixer,
10 parts of polyvinyl alcohol water solution (i.e. PVA, mass concentration 5 that mass percent is 5 % is added in 24 h of mechanical mixture after taking-up
30 min %) are stirred in high-speed mixer, relative rotation speed is 1000 r/min, then obtains pelletizing by shaking-sieving
2。
Step 3: the pelletizing 1 of 200g or so is packed into mold in a manner of jolt-packing, while using sawtooth round tube pair
The powder for being packed into mold carries out slight amount to obtain the oblique hackly surface of ring, then again fills pelletizing 2 in the same way
Enter mold, molding in isostatic pressing machine is put into after sealing is intact and obtains ceramic tube green body, isostatic pressing pressure is 120 MPa, is protected
Press 60 s of time.
24 h are dried Step 4: green body is put into the baking oven of 70 oC, are finally putting into Muffle furnace, heating rate 2
OC/min to 500 oC keeps the temperature 2 h, then is warming up to 900 oC with 2 oC/min, is then heated to 1400 o with 1 oC/min
4 h are kept the temperature under C, obtain ceramic high temperature flue gas filter pipe after cooling.
After tested, ceramic high temperature smoke filtration pipe flange manufactured in the present embodiment and neck porosity are 35 %,
Ceramic pipe body hole gap rate is 42 %, and flange and neck flexural strength are 35 MPa, and the flexural strength of ceramic tube body is 18.7
MPa, ceramic tube neck intensity increase by about one time, and Fig. 3 is the structural schematic diagram of thickness powder binding site, and both sides are tiltedly sawed in ring
Dentation occlusion.Fig. 4 is the practical micro-structure diagram of thickness powder binding site.
Embodiment 3
The ceramic high temperature flue gas filter pipe of this example preparation includes: ceramic pipe flange 1, ceramic tube neck 2 and ceramic tube body 3, institute
Ceramic pipe flange 1, ceramic tube neck 2 and the ceramic tube body 3 stated are silicon carbide material, wherein ceramic pipe flange 1 and ceramic tube
The thin carborundum aggregate particle of neck 2, the thick carborundum aggregate particle of ceramic tube body 3.Prepare the ceramic high temperature flue gas filter pipe
Method the following steps are included:
Step 1: by 84 parts 25 μm of average grain diameter of SiC, 10 parts 5 μm of average grain diameter of carbon dust, 1 part 5 μm of average grain diameter
Burning auxiliary agent (MgO, CaO, ZrO21/4 weight is respectively accounted for mullite fiber) it weighs be put into three-dimensional mixer respectively, machinery is mixed
24 h are closed, 5 parts of the polyvinyl alcohol water solution that mass percent is 5 % is added after taking-up, and (i.e. PVA, mass concentration are 5 %) in height
30 min are stirred in fast blender, relative rotation speed is 1000 r/min, then obtains pelletizing 1 by shaking-sieving.
Step 2: by 84 parts 200 μm of average grain diameter of SiC, 10 parts 20 μm of average grain diameter of carbon dust, 1 part of average grain diameter
5 μm burning auxiliary agent (MgO, CaO, ZrO21/4 weight is respectively accounted for mullite fiber) respectively weigh be put into three-dimensional mixer, machine
Tool mixes 24 h, and 5 parts of the polyvinyl alcohol water solution (i.e. PVA, mass concentration are 5 %) that mass percent is 5 % is added after taking-up
30 min are stirred in high-speed mixer, relative rotation speed is 1000 r/min, then obtains pelletizing 2 by shaking-sieving.
Step 3: the pelletizing 1 of 200g or so is packed into mold in a manner of jolt-packing, while using sawtooth round tube pair
The powder for being packed into mold carries out slight amount to obtain the oblique hackly surface of ring, then again fills pelletizing 2 in the same way
Enter mold, molding in isostatic pressing machine is put into after sealing is intact and obtains ceramic tube green body, isostatic pressing pressure is 150 MPa, is protected
Press 60 s of time.
24 h are dried Step 4: green body is put into the baking oven of 70 oC, are finally putting into Muffle furnace, heating rate 2
OC/min to 500 oC keeps the temperature 2 h, then is warming up to 900 oC with 2 oC/min, is then heated to 1300 o with 1 oC/min
4 h are kept the temperature under C, obtain ceramic high temperature flue gas filter pipe after cooling.
After tested, ceramic high temperature smoke filtration pipe flange manufactured in the present embodiment and neck porosity are 38 %,
Ceramic pipe body hole gap rate is 43 %, and flange and neck flexural strength are 56 MPa, and the flexural strength of ceramic tube body is 20.4
MPa, ceramic tube neck intensity increase nearly 2.7 times.
Embodiment 4
The ceramic high temperature flue gas filter pipe of this example preparation includes: ceramic pipe flange 1, ceramic tube neck 2 and ceramic tube body 3, institute
Ceramic pipe flange 1, ceramic tube neck 2 and the ceramic tube body 3 stated are silicon carbide material, wherein ceramic pipe flange 1 and ceramic tube
The thin carborundum aggregate particle of neck 2, the thick carborundum aggregate particle of ceramic tube body 3.Prepare the ceramic high temperature flue gas filter pipe
Method the following steps are included:
Step 1: by 78 parts 10 μm of average grain diameter of SiC, 10 parts 5 μm of average grain diameter of carbon dust, 2 parts 5 μm of average grain diameter
Burn auxiliary agent (MgO, CaO, ZrO21/4 weight is respectively accounted for mullite fiber) respectively weigh be put into three-dimensional mixer, mechanical mixture
24 h, 10 parts of the polyvinyl alcohol water solution that mass percent is 5 % is added after taking-up, and (i.e. PVA, mass concentration are 5 %) in height
30 min are stirred in fast blender, relative rotation speed is 1000 r/min, then obtains pelletizing 1 by shaking-sieving.
Step 2: by 77 parts 250 μm of average grain diameter of SiC, 12 parts 20 μm of average grain diameter of carbon dust, 3 parts of average grain diameters
5 μm burning auxiliary agent (MgO, CaO, ZrO21/4 weight is respectively accounted for mullite fiber) respectively weigh be put into three-dimensional mixer, machine
Tool mixes 24 h, and 8 parts of the polyvinyl alcohol water solution (i.e. PVA, mass concentration are 5 %) that mass percent is 5 % is added after taking-up
30 min are stirred in high-speed mixer, relative rotation speed is 1000 r/min, then obtains pelletizing 2 by shaking-sieving.
Step 3: the pelletizing 1 of 200g or so is packed into mold in a manner of jolt-packing, while using sawtooth round tube pair
The powder for being packed into mold carries out slight amount to obtain the oblique hackly surface of ring, then again fills pelletizing 2 in the same way
Enter mold, molding in isostatic pressing machine is put into after sealing is intact and obtains ceramic tube green body, isostatic pressing pressure is 180 MPa, is protected
Press 60 s of time.
24 h are dried Step 4: green body is put into the baking oven of 70 oC, are finally putting into Muffle furnace, heating rate 2
OC/min to 500 oC keeps the temperature 2 h, then is warming up to 900 oC with 2 oC/min, is then heated to 1300 o with 1 oC/min
4 h are kept the temperature under C, obtain ceramic high temperature flue gas filter pipe after cooling.
After tested, ceramic high temperature smoke filtration pipe flange manufactured in the present embodiment and neck porosity are 30 %,
Ceramic pipe body hole gap rate is 41 %, and flange and neck flexural strength are 78.9 MPa, and the flexural strength of ceramic tube body is
24.5 MPa, ceramic tube neck intensity increase nearly 3.2 times.
Embodiment 5
The ceramic high temperature flue gas filter pipe of this example preparation includes: ceramic pipe flange 1, ceramic tube neck 2 and ceramic tube body 3, institute
Ceramic pipe flange 1, ceramic tube neck 2 and the ceramic tube body 3 stated are cordierite, wherein ceramic pipe flange 1 and ceramic tube
The thin cordierite particles of aggregates of neck 2, the thick cordierite particles of aggregates of ceramic tube body 3.Prepare the ceramic high temperature flue gas filter pipe
Method the following steps are included:
Step 1: by 82 parts 10 μm of average grain diameter of cordierite, 10 parts 5 μm of average grain diameter of carbon dust, 3 parts of 5 μ of average grain diameter
Burning auxiliary agent (MgO, CaO, ZrO of m21/4 weight is respectively accounted for mullite fiber) it weighs be put into three-dimensional mixer respectively, machinery is mixed
24 h are closed, 5 parts of the polyvinyl alcohol water solution that mass percent is 5 % is added after taking-up, and (i.e. PVA, mass concentration are 5 %) in height
30 min are stirred in fast blender, relative rotation speed is 1000 r/min, then obtains pelletizing 1 by shaking-sieving.
Step 2: 72 parts 300 μm of average grain diameter of cordierite, 15 parts 20 μm of average grain diameter of carbon dust, 3 parts are averaged
5 μm of partial size burning auxiliary agent (MgO, CaO, ZrO21/4 weight is respectively accounted for mullite fiber) respectively weigh be put into three-dimensional mixer
In, polyvinyl alcohol water solution 10 parts of (i.e. PVA, mass concentrations that mass percent is 5 % are added in 24 h of mechanical mixture after taking-up
30 min are stirred in high-speed mixer for 5 %), relative rotation speed is 1000 r/min, is then made by shaking-sieving
Grain powder 2.
Step 3: the pelletizing 1 of 200g or so is packed into mold in a manner of jolt-packing, while using sawtooth round tube pair
The powder for being packed into mold carries out slight amount to obtain the oblique hackly surface of ring, then again fills pelletizing 2 in the same way
Enter mold, molding in isostatic pressing machine is put into after sealing is intact and obtains ceramic tube green body, isostatic pressing pressure is 120 MPa, is protected
Press 60 s of time.
24 h are dried Step 4: green body is put into the baking oven of 70 oC, are finally putting into Muffle furnace, heating rate 2
OC/min to 500 oC keeps the temperature 2 h, then is warming up to 900 oC with 2 oC/min, is then heated to 1200 o with 1 oC/min
2 h are kept the temperature under C, obtain ceramic high temperature flue gas filter pipe after cooling.
After tested, ceramic high temperature smoke filtration pipe flange manufactured in the present embodiment and neck porosity are 36 %,
Ceramic pipe body hole gap rate is 45 %, and flange and neck flexural strength are 38.6 MPa, and the flexural strength of ceramic tube body is
15.5 MPa, ceramic tube neck intensity increase nearly 2.5 times.
Embodiment 6
The ceramic high temperature flue gas filter pipe of this example preparation includes: ceramic pipe flange 1, ceramic tube neck 2 and ceramic tube body 3, institute
Ceramic pipe flange 1, ceramic tube neck 2 and the ceramic tube body 3 stated are silicon nitride material, wherein ceramic pipe flange 1 and ceramic tube
The thin silicon nitride particles of aggregates of neck 2, the thick silicon nitride particles of aggregates of ceramic tube body 3.Prepare the ceramic high temperature flue gas filter pipe
Method the following steps are included:
Step 1: by 82 parts 10 μm of average grain diameter of silicon nitride, 10 parts 5 μm of average grain diameter of carbon dust, 3 parts of 5 μ of average grain diameter
Burning auxiliary agent (MgO, CaO, ZrO of m21/4 weight is respectively accounted for mullite fiber) it weighs be put into three-dimensional mixer respectively, machinery is mixed
24 h are closed, 5 parts of the polyvinyl alcohol water solution that mass percent is 5 % is added after taking-up, and (i.e. PVA, mass concentration are 5 %) in height
30 min are stirred in fast blender, relative rotation speed is 1000 r/min, then obtains pelletizing 1 by shaking-sieving.
Step 2: 72 parts 200 μm of average grain diameter of silicon nitride, 15 parts 20 μm of average grain diameter of carbon dust, 3 parts are averaged
5 μm of partial size burning auxiliary agent (MgO, CaO, ZrO21/4 weight is respectively accounted for mullite fiber) respectively weigh be put into three-dimensional mixer
In, polyvinyl alcohol water solution 10 parts of (i.e. PVA, mass concentrations that mass percent is 5 % are added in 24 h of mechanical mixture after taking-up
30 min are stirred in high-speed mixer for 5 %), relative rotation speed is 1000 r/min, is then made by shaking-sieving
Grain powder 2.
Step 3: the pelletizing 1 of 200g or so is packed into mold in a manner of jolt-packing, while using sawtooth round tube pair
The powder for being packed into mold carries out slight amount to obtain the oblique hackly surface of ring, then again fills pelletizing 2 in the same way
Enter mold, molding in isostatic pressing machine is put into after sealing is intact and obtains ceramic tube green body, isostatic pressing pressure is 120 MPa, is protected
Press 60 s of time.
24 h are dried Step 4: green body is put into the baking oven of 70 oC, are finally putting into Muffle furnace, heating rate 2
OC/min to 500 oC keeps the temperature 2 h, then is warming up to 1100 oC with 2 oC/min, is then heated to 1400 with 1 oC/min
4 h are kept the temperature under oC, obtain ceramic high temperature flue gas filter pipe after cooling.
After tested, ceramic high temperature smoke filtration pipe flange manufactured in the present embodiment and neck porosity are 26 %,
Ceramic pipe body hole gap rate is 44 %, and flange and neck flexural strength are 124 MPa, and the flexural strength of ceramic tube body is 42
MPa, ceramic tube neck intensity increase nearly 3.0 times.
Embodiment 7
The ceramic high temperature flue gas filter pipe of this example preparation includes: ceramic pipe flange 1, ceramic tube neck 2 and ceramic tube body 3, institute
Ceramic pipe flange 1, ceramic tube neck 2 and the ceramic tube body 3 stated are mullite material, wherein ceramic pipe flange 1 and ceramic tube
The thin mullite aggregate particle of neck 2, the thick mullite aggregate particle of ceramic tube body 3.Prepare the ceramic high temperature flue gas filter pipe
Method the following steps are included:
Step 1: by 82 parts 50 μm of average grain diameter of mullite, 10 parts 5 μm of average grain diameter of carbon dust, 3 parts of 5 μ of average grain diameter
Burning auxiliary agent (MgO, CaO, ZrO of m21/4 weight is respectively accounted for mullite fiber) it weighs be put into three-dimensional mixer respectively, machinery is mixed
24 h are closed, 5 parts of the polyvinyl alcohol water solution that mass percent is 5 % is added after taking-up, and (i.e. PVA, mass concentration are 5 %) in height
30 min are stirred in fast blender, relative rotation speed is 1000 r/min, then obtains pelletizing 1 by shaking-sieving.
Step 2: 72 parts 300 μm of average grain diameter of mullite, 15 parts 20 μm of average grain diameter of carbon dust, 3 parts are averaged
5 μm of partial size burning auxiliary agent (MgO, CaO, ZrO21/4 weight is respectively accounted for mullite fiber) respectively weigh be put into three-dimensional mixer
In, polyvinyl alcohol water solution 10 parts of (i.e. PVA, mass concentrations that mass percent is 5 % are added in 24 h of mechanical mixture after taking-up
30 min are stirred in high-speed mixer for 5 %), relative rotation speed is 1000 r/min, is then made by shaking-sieving
Grain powder 2.
Step 3: the pelletizing 1 of 200g or so is packed into mold in a manner of jolt-packing, while using sawtooth round tube pair
The powder for being packed into mold carries out slight amount to obtain the oblique hackly surface of ring, then again fills pelletizing 2 in the same way
Enter mold, molding in isostatic pressing machine is put into after sealing is intact and obtains ceramic tube green body, isostatic pressing pressure is 150 MPa, is protected
Press 60 s of time.
24 h are dried Step 4: green body is put into the baking oven of 70 oC, are finally putting into Muffle furnace, heating rate 2
OC/min to 500 oC keeps the temperature 2 h, then is warming up to 1100 oC with 2 oC/min, is then heated to 1400 with 1 oC/min
4 h are kept the temperature under oC, obtain ceramic high temperature flue gas filter pipe after cooling.
After tested, ceramic high temperature smoke filtration pipe flange manufactured in the present embodiment and neck porosity are 33 %,
Ceramic pipe body hole gap rate is 45 %, and flange and neck flexural strength are 69 MPa, and the flexural strength of ceramic tube body is 30
MPa, ceramic tube neck intensity increase nearly 2.3 times.
Claims (10)
1. a kind of enhanced ceramic high temperature flue gas filter pipe of flange neck, which is characterized in that the enhanced ceramics of the flange neck are high
Warm flue gas filter pipe includes (3) three ceramic pipe flange (1), ceramic tube neck (2) and ceramic tube body parts, the ceramic tube
Flange (1), ceramic tube neck (2) and ceramic tube body (3) are same material, the ceramics pipe flange (1) and ceramic tube neck
(2) the formula aggregate size used in is identical, and the ceramics tube body (3) is matched with used in ceramic pipe flange (1) and ceramic tube neck (2)
Square aggregate size is different, the ceramics pipe flange (1), ceramic tube neck (2) and ceramic tube body (3) be gradient filling once at
Type, the ceramics tube neck (2) and ceramic tube body (3) contact surface are the occlusion of circular slanting zigzag.
2. a kind of preparation method of the enhanced ceramic high temperature flue gas filter pipe of flange neck, which is characterized in that the preparation method packet
Containing following steps:
Step 1: the mixed powder that ceramic fine powder is aggregate is added in polyurethane mould, ceramic pipe flange (1) and ceramics are obtained
Tube neck (2) pre- laminate；
Step 2: being pressed with the round tube of the oblique sawtooth in end face, then it is added using ceramic coarse powder as the mixed powder of aggregate, and shake
Dynamic to tamp until die cavity is full of, then ceramic tube body (3) the pre- laminate of acquisition forms to obtain ceramic tube in cold isostatic press mesohigh
Green compact；
It is sintered Step 3: earthenware green compact is put into high temperature furnace, finally obtains the enhanced ceramic high temperature smoke filtration of flange neck
Pipe.
3. a kind of preparation method of the enhanced ceramic high temperature flue gas filter pipe of flange neck according to claim 2, special
Sign is that the ceramic aggregate is silicon carbide, silicon nitride, mullite or cordierite.
4. a kind of preparation method of the enhanced ceramic high temperature flue gas filter pipe of flange neck according to claim 2, special
Sign is that ceramics fine powder aggregate size used in the ceramic pipe flange (1) and ceramic tube neck (2) is 10-50 μm.
5. a kind of preparation method of the enhanced ceramic high temperature flue gas filter pipe of flange neck according to claim 2, special
Sign is that ceramics coarse powder aggregate size used in the ceramic tube body (3) is 200-300 μm.
6. a kind of preparation method of the enhanced ceramic high temperature flue gas filter pipe of flange neck according to claim 2, special
Sign is, the mixed powder main component group become 72-84 parts of ceramic aggregate, burn 1-3 part of auxiliary agent, 5-10 parts of adhesive and
10-15 parts of pore creating material.
7. a kind of preparation method of the enhanced ceramic high temperature flue gas filter pipe of flange neck according to claim 2, special
Sign is that the cold isostatic press briquetting pressure is 120-180 MPa.
8. a kind of preparation method of the enhanced ceramic high temperature flue gas filter pipe of flange neck according to claim 2, special
Sign is that the high temperature sintering temperature is 1200-1400 oC.
9. a kind of preparation method of the enhanced ceramic high temperature flue gas filter pipe of flange neck according to claim 6, special
Sign is that the burning auxiliary agent is MgO, CaO, ZrO2And mullite fiber.
10. a kind of preparation method of the enhanced ceramic high temperature flue gas filter pipe of flange neck according to claim 6, special
Sign is that the adhesive is the polyvinyl alcohol water solution or cmc soln of 5wt %, and pore creating material is carbon dust.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4321294A1 (en) * | 1993-06-26 | 1995-01-05 | Buscher Alfred | Candle filter |
| US5653878A (en) * | 1995-05-26 | 1997-08-05 | Innova Pure Water Inc. | Single orifice bottle water filter |
| CN101530701A (en) * | 2008-03-10 | 2009-09-16 | 山东理工大学 | Preparation method for silicon carbide candled filter |
| CN102633531A (en) * | 2012-03-31 | 2012-08-15 | 中国科学院金属研究所 | Gradient-porosity pure silicon carbide membrane tube and preparation method thereof |
| CN106882360A (en) * | 2016-11-02 | 2017-06-23 | 中国航天空气动力技术研究院 | A kind of attachment structure and preparation method for solar powered aircraft main spar |
-
2019
- 2019-09-16 CN CN201910868052.3A patent/CN110451980B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4321294A1 (en) * | 1993-06-26 | 1995-01-05 | Buscher Alfred | Candle filter |
| US5653878A (en) * | 1995-05-26 | 1997-08-05 | Innova Pure Water Inc. | Single orifice bottle water filter |
| CN101530701A (en) * | 2008-03-10 | 2009-09-16 | 山东理工大学 | Preparation method for silicon carbide candled filter |
| CN102633531A (en) * | 2012-03-31 | 2012-08-15 | 中国科学院金属研究所 | Gradient-porosity pure silicon carbide membrane tube and preparation method thereof |
| CN106882360A (en) * | 2016-11-02 | 2017-06-23 | 中国航天空气动力技术研究院 | A kind of attachment structure and preparation method for solar powered aircraft main spar |
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