CN114230327A - Preparation method of low-backpressure diesel engine tail gas particulate filter (DPF) - Google Patents
Preparation method of low-backpressure diesel engine tail gas particulate filter (DPF) Download PDFInfo
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- CN114230327A CN114230327A CN202111646738.1A CN202111646738A CN114230327A CN 114230327 A CN114230327 A CN 114230327A CN 202111646738 A CN202111646738 A CN 202111646738A CN 114230327 A CN114230327 A CN 114230327A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052878 cordierite Inorganic materials 0.000 claims abstract description 15
- 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 abstract description 15
- 239000000428 dust Substances 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 238000010304 firing Methods 0.000 claims abstract description 10
- 238000004898 kneading Methods 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 238000002468 ceramisation Methods 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 239000002245 particle Substances 0.000 claims abstract description 5
- 238000004017 vitrification Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 21
- 238000005245 sintering Methods 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000005995 Aluminium silicate Substances 0.000 claims description 4
- 235000012211 aluminium silicate Nutrition 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 4
- 239000001913 cellulose Substances 0.000 claims description 4
- 229920002678 cellulose Polymers 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 4
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000314 lubricant Substances 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 239000000454 talc Substances 0.000 claims description 4
- 229910052623 talc Inorganic materials 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 abstract 1
- 239000011148 porous material Substances 0.000 description 13
- 239000007789 gas Substances 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 239000008358 core component Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
- C04B38/063—Preparing or treating the raw materials individually or as batches
- C04B38/0635—Compounding ingredients
- C04B38/0645—Burnable, meltable, sublimable materials
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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
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
- C04B35/18—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in aluminium oxide
- C04B35/195—Alkaline earth aluminosilicates, e.g. cordierite or anorthite
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
-
- 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
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/602—Making the green bodies or pre-forms by moulding
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Filtering Materials (AREA)
- Processes For Solid Components From Exhaust (AREA)
Abstract
The invention discloses a preparation method of a low back pressure diesel engine tail gas particulate filter (DPF), which comprises the following steps: step one, batching; step two, mixing; step three, kneading: kneading the mixed raw materials to form pug; step four, molding; step five, drying; step six, firing; step seven, ceramization: placing the blank body in a kiln furnace, heating to 1400-1500 ℃ for firing, and carrying out vitrification on the fired blank body to form a cordierite finished product; step eight, removing dust; and step nine, checking, wherein the alumina with the particle size of 12 +/-1 um, the D10 being more than or equal to 5um and the D97 being less than or equal to 25um is used for manufacturing cordierite required by the DPF product, the production process is simple, the actual operation is convenient, the large-scale production is easy to realize, and the production efficiency of the product is improved.
Description
Technical Field
The invention relates to a preparation method of a low back pressure diesel engine tail gas particulate filter (DPF).
Background
With the implementation of the motor vehicle's national six-emission regulations, diesel exhaust particulate traps (DPFs) have become an integral core component of the national six-aftertreatment systems.
The previous invention focuses on the trapping efficiency of DPF products, and in order to meet the requirements of the national emission regulation PN, the currently adopted effective method is as follows: the porosity and the median pore diameter of the product are all reduced. Due to the fact that the porosity and the median pore diameter are reduced, resistance of the discharged waste gas is correspondingly increased when the discharged waste gas passes through the pore wall of the DPF material, and finally back pressure of the whole set of aftertreatment device is increased, power of an engine is reduced, and oil consumption is increased.
In the past, the porosity of a product is 52 +/-4%, the median pore diameter is 13 +/-3 mu M, the product backpressure is less than or equal to 2KPa at the flow rate of 800M3/min, and the PN filtering efficiency of a DPF product cannot meet the national six-regulation requirement, so that a preparation method of a low-backpressure diesel engine tail gas particulate filter (DPF) is urgently needed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a preparation method of a low-backpressure diesel engine exhaust particulate filter (DPF).
A method for preparing a low back pressure diesel exhaust particulate trap (DPF) comprises the following steps:
step one, batching: weighing a plurality of main materials and a plurality of auxiliary materials according to the preparation proportion of the DPF;
step two, mixing: the main material and the auxiliary material are placed in a stirrer to be mixed to form mixed raw materials;
step three, kneading: kneading the mixed raw materials to form pug;
step four, forming: placing the pug in a mould for extrusion forming to form a wet blank;
step five, drying: placing the formed wet blank in a microwave oven for moisture volatilization treatment to shape the product;
step six, firing: placing the shaped wet blank into a sintering machine for sintering treatment to form a blank body, and cutting according to the rear end face of the blank body after sintering shrinkage so as to determine the height of a product main body;
step seven, ceramization: placing the product main body in a kiln furnace, heating the kiln furnace to 1400-1500 ℃ for firing, and carrying out vitrification on the fired blank body to form a cordierite finished product;
step eight, dust removal: carrying out dust blowing treatment on the surface dust of the cordierite finished product;
step nine, checking: the dust-blown cordierite product was examined.
As a further improvement, the plurality of main materials in the first step include: kaolin, talc, alumina and silica, wherein the auxiliary materials in the step one comprise a plurality of different types of forming aids.
As a further improvement, the forming auxiliary comprises: cellulose, a lubricant and a blender.
As a further improvement, the median particle size of the alumina is between 12 +/-1 um, the D10 of the alumina is more than or equal to 5um, and the D97 of the alumina is less than or equal to 25 um.
Has the advantages that:
the invention is novel in design, the PN filtering efficiency of the DPF product meets the requirements of the national six regulations, the improvement of the traditional DPF product equipment focuses on the trapping efficiency, the mode of reducing the porosity and the median pore diameter is usually adopted to meet the practical requirement, the resistance is increased due to the reduction of the porosity and the median pore diameter, the backpressure of a processing device in the equipment is increased, the power of an engine is reduced, and the oil consumption is greatly increased, the invention is different from the traditional DPF product equipment, the effect is realized by optimizing the distribution condition of the pore diameter in the equipment, the proportion of small pore diameter is reduced under the condition of ensuring that the backpressure of the processing device is not increased and the porosity and the median pore diameter are not reduced, the purpose of reducing the backpressure of the processing device is achieved, and through repeated tests, the invention adopts the pore diameter distribution mode that the D pore factor is less than or equal to 0.5, and solves the defects of the traditional equipment, the use efficiency of equipment is improved, the filter effect of equipment has been strengthened.
The method utilizes the alumina with the grain diameter of 12 +/-1 um, the D10 being more than or equal to 5um and the D97 being less than or equal to 25um to manufacture the cordierite required by the DPF product, has simple production process and convenient actual operation, is easy to realize large-scale production and improves the production efficiency of the product.
Detailed Description
For the purpose of enhancing understanding of the present invention, the present invention will be further described in detail with reference to the following examples, which are provided for illustration only and are not to be construed as limiting the scope of the present invention.
The first embodiment is as follows:
a preparation method of a low back pressure diesel engine tail gas particulate filter (DPF) comprises the following raw materials: kaolin, talc, alumina, silica and a forming assistant, wherein the forming assistant comprises: cellulose, a lubricant and a blending agent, wherein the median particle size of alumina is 11.45um, the D10 of the alumina is 6.613um, and the D97 of the alumina is 22.28 um.
Step one, batching: weighing a plurality of main materials and a plurality of auxiliary materials according to the preparation proportion of the DPF;
step two, mixing: the main material and the auxiliary material are placed in a stirrer to be mixed to form mixed raw materials;
step three, kneading: kneading the mixed raw materials to form pug;
step four, forming: placing the pug in a mould for extrusion forming to form a wet blank;
step five, drying: placing the formed wet blank in a microwave oven for moisture volatilization treatment to shape the product;
step six, firing: placing the shaped wet blank into a sintering machine for sintering treatment to form a blank body, and cutting according to the rear end face of the blank body after sintering shrinkage so as to determine the height of a product main body;
step seven, ceramization: placing the product main body in a kiln furnace, heating the kiln furnace to 1400 ℃ for firing, and carrying out vitrification on the fired blank body to form a cordierite finished product;
step eight, dust removal: carrying out dust blowing treatment on the surface dust of the cordierite finished product;
step nine, checking: the dust-blown cordierite product was examined.
The median pore diameter of the sample prepared according to the data is 10.31, the small factor of the sample D is 0.38, and the back pressure generated by the processing device in actual use is 0.46, so that the use requirement is met.
Example two:
a preparation method of a low back pressure diesel engine tail gas particulate filter (DPF) comprises the following raw materials: kaolin, talc, alumina, silicon dioxide and a forming assistant, wherein the forming assistant comprises: cellulose, lubricant and blending agent, wherein the median particle size of the alumina is 9.343um, the D10 of the alumina is 2.651um, and the D97 of the alumina is 63.99 um.
Step one, batching: weighing a plurality of main materials and a plurality of auxiliary materials according to the preparation proportion of the DPF;
step two, mixing: the main material and the auxiliary material are placed in a stirrer to be mixed to form mixed raw materials;
step three, kneading: kneading the mixed raw materials to form pug;
step four, forming: placing the pug in a mould for extrusion forming to form a wet blank;
step five, drying: placing the formed wet blank in a microwave oven for moisture volatilization treatment to shape the product;
step six, firing: placing the shaped wet blank into a sintering machine for sintering treatment to form a blank body, and cutting according to the rear end face of the blank body after sintering shrinkage so as to determine the height of a product main body;
step seven, ceramization: placing the product main body in a kiln furnace, heating the kiln furnace to 1450 ℃ for firing, and carrying out vitrification on the fired blank body to form a cordierite finished product;
step eight, dust removal: carrying out dust blowing treatment on the surface dust of the cordierite finished product;
step nine, checking: the dust-blown cordierite product was examined.
The median pore diameter of the sample prepared according to the data is 9.85, the small factor of the sample D is 0.76, and the backpressure generated by the processing device in actual use is 0.69, so that the use requirement is not met.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (4)
1. A method for preparing a low back pressure diesel exhaust particulate trap (DPF) comprises the following steps:
step one, batching: weighing a plurality of main materials and a plurality of auxiliary materials according to the preparation proportion of the DPF;
step two, mixing: the main material and the auxiliary material are placed in a stirrer to be mixed to form mixed raw materials;
step three, kneading: kneading the mixed raw materials to form pug;
step four, forming: placing the pug in a mould for extrusion forming to form a wet blank;
step five, drying: placing the formed wet blank in a microwave oven for moisture volatilization treatment to shape the product;
step six, firing: placing the shaped wet blank into a sintering machine for sintering treatment to form a blank body, and cutting according to the rear end face of the blank body after sintering shrinkage so as to determine the height of a product main body;
step seven, ceramization: placing the product main body in a kiln furnace, heating the kiln furnace to 1400-1500 ℃ for firing, and carrying out vitrification on the fired blank body to form a cordierite finished product;
step eight, dust removal: carrying out dust blowing treatment on the surface dust of the cordierite finished product;
step nine, checking: the dust-blown cordierite product was examined.
2. The method as claimed in claim 1, wherein the first step of preparing a plurality of main materials comprises: kaolin, talc, alumina and silica, wherein the auxiliary materials in the step one comprise a plurality of different types of forming aids.
3. The method of claim 2, wherein the forming aid comprises: cellulose, a lubricant and a blender.
4. The method of claim 2, wherein the alumina has a median particle size of 12 ± 1um, a D10 of 5um or more, and a D97 of 25um or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111646738.1A CN114230327A (en) | 2021-12-29 | 2021-12-29 | Preparation method of low-backpressure diesel engine tail gas particulate filter (DPF) |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111646738.1A CN114230327A (en) | 2021-12-29 | 2021-12-29 | Preparation method of low-backpressure diesel engine tail gas particulate filter (DPF) |
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| CN114230327A true CN114230327A (en) | 2022-03-25 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040261384A1 (en) * | 2003-06-25 | 2004-12-30 | Merkel Gregory A. | Cordierite filters with reduced pressure drop |
| CN101336215A (en) * | 2005-12-21 | 2008-12-31 | 康宁股份有限公司 | Batch composition for the manufacture of a porous cordierite ceramic article and method for making a porous cordierite ceramic article |
| CN101484403A (en) * | 2006-05-10 | 2009-07-15 | 康宁股份有限公司 | High porosity cordierite composition |
| CN101506123A (en) * | 2006-08-25 | 2009-08-12 | 康宁股份有限公司 | Narrow pore size distribution cordierite ceramic honeycomb articles and methods for manufacturing same |
| CN101506124A (en) * | 2006-08-25 | 2009-08-12 | 康宁股份有限公司 | Low back pressure porous cordierite ceramic honeycomb article and methods for manufacturing same |
| CN110143825A (en) * | 2019-05-13 | 2019-08-20 | 山东国瓷功能材料股份有限公司 | A kind of cordierite ceramic honeycomb filtering body of narrow pore-size distribution and preparation method thereof |
| CN112430123A (en) * | 2020-12-07 | 2021-03-02 | 重庆奥福精细陶瓷有限公司 | Narrow-pore-diameter-distribution large-size cordierite gasoline particle filter and preparation method thereof |
-
2021
- 2021-12-29 CN CN202111646738.1A patent/CN114230327A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040261384A1 (en) * | 2003-06-25 | 2004-12-30 | Merkel Gregory A. | Cordierite filters with reduced pressure drop |
| CN101336215A (en) * | 2005-12-21 | 2008-12-31 | 康宁股份有限公司 | Batch composition for the manufacture of a porous cordierite ceramic article and method for making a porous cordierite ceramic article |
| CN101484403A (en) * | 2006-05-10 | 2009-07-15 | 康宁股份有限公司 | High porosity cordierite composition |
| CN101506123A (en) * | 2006-08-25 | 2009-08-12 | 康宁股份有限公司 | Narrow pore size distribution cordierite ceramic honeycomb articles and methods for manufacturing same |
| CN101506124A (en) * | 2006-08-25 | 2009-08-12 | 康宁股份有限公司 | Low back pressure porous cordierite ceramic honeycomb article and methods for manufacturing same |
| CN110143825A (en) * | 2019-05-13 | 2019-08-20 | 山东国瓷功能材料股份有限公司 | A kind of cordierite ceramic honeycomb filtering body of narrow pore-size distribution and preparation method thereof |
| CN112430123A (en) * | 2020-12-07 | 2021-03-02 | 重庆奥福精细陶瓷有限公司 | Narrow-pore-diameter-distribution large-size cordierite gasoline particle filter and preparation method thereof |
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