CN107489498A - The exhaust gas filter of good purification and the coating processes of honeycomb substrate - Google Patents
The exhaust gas filter of good purification and the coating processes of honeycomb substrate Download PDFInfo
- Publication number
- CN107489498A CN107489498A CN201610401837.6A CN201610401837A CN107489498A CN 107489498 A CN107489498 A CN 107489498A CN 201610401837 A CN201610401837 A CN 201610401837A CN 107489498 A CN107489498 A CN 107489498A
- Authority
- CN
- China
- Prior art keywords
- honeycomb
- ceramic
- exhaust gas
- carrier
- screen pack
- Prior art date
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- Pending
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- 238000000576 coating method Methods 0.000 title claims abstract description 24
- 238000000746 purification Methods 0.000 title claims abstract description 21
- 239000000758 substrate Substances 0.000 title claims abstract description 14
- 239000000919 ceramic Substances 0.000 claims abstract description 67
- 239000007789 gas Substances 0.000 claims abstract description 38
- 239000002002 slurry Substances 0.000 claims abstract description 22
- 241000220317 Rosa Species 0.000 claims abstract description 14
- 239000003054 catalyst Substances 0.000 claims abstract description 11
- 239000011248 coating agent Substances 0.000 claims abstract description 10
- 239000000243 solution Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 13
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 10
- 150000002910 rare earth metals Chemical class 0.000 claims description 10
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 7
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 7
- 239000003292 glue Substances 0.000 claims description 6
- 239000002808 molecular sieve Substances 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 5
- 239000004411 aluminium Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 235000015110 jellies Nutrition 0.000 claims description 5
- 239000008274 jelly Substances 0.000 claims description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 5
- 229940068984 polyvinyl alcohol Drugs 0.000 claims description 5
- 235000019422 polyvinyl alcohol Nutrition 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 230000001413 cellular effect Effects 0.000 claims description 4
- 229910052763 palladium Inorganic materials 0.000 claims description 4
- 229910052697 platinum Inorganic materials 0.000 claims description 4
- 229910052703 rhodium Inorganic materials 0.000 claims description 4
- 239000010948 rhodium Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000002250 absorbent Substances 0.000 claims description 3
- 230000002745 absorbent Effects 0.000 claims description 3
- 230000004520 agglutination Effects 0.000 claims description 3
- 239000003610 charcoal Substances 0.000 claims description 3
- 238000010304 firing Methods 0.000 claims description 3
- QMEZUZOCLYUADC-UHFFFAOYSA-N hydrate;dihydrochloride Chemical compound O.Cl.Cl QMEZUZOCLYUADC-UHFFFAOYSA-N 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 239000010970 precious metal Substances 0.000 claims description 3
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 3
- 230000002000 scavenging effect Effects 0.000 claims description 3
- 238000001914 filtration Methods 0.000 abstract description 17
- 239000002245 particle Substances 0.000 abstract description 15
- 239000000779 smoke Substances 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 8
- 239000002912 waste gas Substances 0.000 abstract description 8
- 241000264877 Hippospongia communis Species 0.000 description 44
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000006255 coating slurry Substances 0.000 description 2
- 230000000505 pernicious effect Effects 0.000 description 2
- 238000007581 slurry coating method Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052878 cordierite Inorganic materials 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- 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
- F01N3/033—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 in combination with other devices
- F01N3/035—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 in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/89—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals
- B01J23/8933—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals also combined with metals, or metal oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/8986—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals also combined with metals, or metal oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with manganese, technetium or rhenium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
- B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
-
- 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
-
- 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
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/06—Ceramic, e.g. monoliths
-
- 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
- F01N2370/00—Selection of materials for exhaust purification
- F01N2370/40—Activated carbon or charcoal
-
- 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
- F01N2510/00—Surface coverings
- F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
-
- 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
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/10—Carbon or carbon oxides
-
- 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
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/12—Hydrocarbons
-
- 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
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/14—Nitrogen oxides
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The present invention relates to a kind of exhaust gas filter of good purification.It includes Rose Box（1）, the Rose Box（1）Interior edge airflow direction is disposed with the first screen pack（2）, the first ceramic honeycomb carrier（3）, the second ceramic honeycomb carrier（7）With the second screen pack（8）, the coating processes of honeycomb substrate are including Step 1: dispensing；Step 2: take slurry；Step 3: coating；Step 4: fire.A kind of exhaust gas filter of good purification of the present invention and the coating processes of honeycomb substrate, under the filtering of the first screen pack, the first ceramic honeycomb carrier, the second ceramic honeycomb carrier and the second screen pack level Four, by tail gas, react into CO2、H2O, the micropore on next door can effectively filter the black smoke particle in waste gas, and black smoke particle can be burned off in the presence of catalyst coat, further increase tail gas clean-up effect；The slurry of coating can be combined fully with ceramic monolith so that the good filtration effect of ceramic monolith.
Description
Technical field
The present invention relates to a kind of exhaust gas filter of good purification and the coating processes of honeycomb substrate, for vehicle exhaust
Purification.Belong to automobile equipment technical field.
Background technology
At present, common car tail-gas filter, it is expelled directly out without filtering, otherwise is exactly filter
It is improper, it is easy to lead and put air pollution and noise pollution；Particularly, the automobile of diesel engine is equipped with, due to diesel engine
Contain black smoke particle in the tail gas of machine, existing exhaust gas filter can not effectively filter black smoke particle, can so cause environment dirty
Dye.
Existing ceramic-substrate catalyst coating processes are, in the bottom up injection coating slurry of ceramic monolith, Ci Zhonggong
The defects of skill, is：Slurry is in watery, and not only coating difficulty is big, and coating slurry can not fully be combined with carrier, after coating
Ceramic monolith unsightly, and poor filtration effect.
The content of the invention
It is an object of the invention to overcome above-mentioned deficiency, there is provided the exhaust gas filter and cellular set of a kind of good purification
The coating processes of body, this exhaust gas filter can also filter black while CO, HC, NOx pernicious gas in filtering vehicle exhaust
Smoke particle, and black smoke particle can progressively burn and aoxidize at high temperature；Coating processes not only coat uniformly, and the slurry coated
Can fully it be combined with ceramic monolith so that the good filtration effect of ceramic monolith.
The object of the present invention is achieved like this：
A kind of exhaust gas filter of good purification, including Rose Box, are characterized in：The Rose Box is in cylinder, Rose Box
Interior edge airflow direction is disposed with the first screen pack, the first ceramic honeycomb carrier, the second ceramic honeycomb carrier and the second filtering
Net, first ceramic honeycomb carrier is identical with the second ceramic honeycomb carrier structure, and shape is corresponding with Rose Box, the first ceramics
Honeycomb substrate is densely covered with stomata in the axial direction, and one end of the stomata is opening, and the other end is provided with closure face, the closure
Face and open space arrangement, the two neighboring stomata is provided with next door, is provided with next door in cellular micropore, is applied on next door
It is covered with catalyst coat.
A kind of exhaust gas filter of good purification of the present invention, the hole count of its stomata is 600 holes/square inch.
A kind of exhaust gas filter of good purification of the present invention, the thickness in its next door is 0.13 ~ 0.14mm.
A kind of exhaust gas filter of good purification of the present invention, its first screen pack are made of copper monoxide material.
A kind of exhaust gas filter of good purification of the present invention, its special second screen pack are made of absorbent charcoal material.
The coating processes of the honeycomb substrate of the present invention, are characterized in：The coating processes comprise the following steps：
Step 1: dispensing, activated alumina and platinum, rhodium, palladium precious metal solution are mixed 12 hours, obtain percetage by weight first
30-70% mixed solution, percetage by weight 25-60% rare earth is then incorporated, adds percetage by weight 1-5% activearm
Point（Molecular sieve）, percetage by weight 1-5% high-molecular resin solution, percetage by weight 1-5% aluminium glue, percetage by weight 1-
5% rare earth nitrades, stir agglutination in 6 hours；Its middle rare earth is chloride oxygen scavenging material；Active component is high porosity
Molecular sieve；High-molecular resin solution is poly-vinyl alcohol solution, and its water is 1 with material ratio：20；
Step 2: taking slurry, by calculating the area in honeycomb ceramic carrier next door, and then calculate gluey in required step one
The weight of mixed liquor, quantitative gluey mixed liquor is then taken out with container；
Step 3: coating, honeycomb ceramic carrier is placed in the top of a suction device, suction device and honeycomb ceramic carrier
Bottom is close to, and the obtained slurry of step 3 is poured on into the top surface of honeycomb ceramic carrier, and slurry jelly does not possess mobility,
Positioned at the surface of honeycomb ceramic carrier, suction device is now opened, in the presence of suction device, gluey slurry is along honeycomb
The next door of ceramic monolith is attracted to bottom surface from top surface；
Step 4: firing, the stove that the honeycomb ceramic carrier that step 4 is obtained is placed in 550 DEG C fires 3-5 hours.
Compared with prior art, the beneficial effects of the invention are as follows：
A kind of exhaust gas filter of good purification of the present invention and the coating processes of honeycomb substrate, in the first screen pack, the first pottery
Under porcelain honeycomb substrate, the second ceramic honeycomb carrier and the filtering of the second screen pack level Four, by the tail that main component is CO, HC, NOx
Gas, react into CO2、H2O、N2And O2, while the micropore on next door can effectively filter the black smoke particle in waste gas, and in catalyst
Black smoke particle can be burned off in the presence of coating, further increase tail gas clean-up effect；Added in dispensing as bonding
The poly-vinyl alcohol solution of agent and the aluminium glue as adsorbent, therefore the mixed liquor after stirring is jelly, and in matching step three
Suction device, slurry can be caused to be coated since the top surface of ceramic monolith, be coated with existing since ceramic monolith bottom
The technique of watery slurry is compared, and slurry coating of the present invention is uniform, and the slurry of coating can be combined fully with ceramic monolith so that ceramics
The good filtration effect of carrier.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the exhaust gas filter of good purification of the present invention.
Fig. 2 is Fig. 1 left view.
Fig. 3 is the schematic cross-section of the first ceramic honeycomb carrier of the present invention.
Fig. 4 is the partial axial section figure of the first ceramic honeycomb carrier of the present invention.
Fig. 5 is the structural representation in the next door of the first ceramic honeycomb carrier of the present invention.
In figure：
Rose Box 1,
First screen pack 2,
First ceramic honeycomb carrier 3,
Stomata 3.1,
Closure face 3.2,
Next door 3.3,
Micropore 3.4,
Catalyst coat 3.5
Opening 3.6,
Inlet exhaust gas 4,
Offgas outlet 5,
Tail gas 6,
Second ceramic honeycomb carrier 7,
Second screen pack 8.
Embodiment
Referring to Fig. 1-5, the present invention relates to a kind of exhaust gas filter of good purification, and it is filtered including Rose Box 1, first
Net 2, the first ceramic honeycomb carrier 3, the second ceramic honeycomb carrier 7 and the second screen pack 8, the left end of Rose Box 1 is inlet exhaust gas
4, right-hand member is offgas outlet 5, first screen pack 2, the first ceramic honeycomb carrier 3, the second ceramic honeycomb carrier 7 and the second mistake
Filter screen 8 is arranged in Rose Box 1, and the first screen pack 2 is at inlet exhaust gas 4, and the second screen pack 8 is at offgas outlet 5, institute
Rose Box 1 is stated in cylinder, first ceramic honeycomb carrier 3 is identical with the structure of the second honeycomb substrate 7, and shape and filtering
The correspondence of case 1 is selected, the first ceramic honeycomb carrier 3 is densely covered with stomata 3.1 in the axial direction, and one end of the stomata 3.1 is opening
3.6, the other end is provided with closure face 3.2, the closure face 3.2 and the arranged for interval of opening 3.6, the two neighboring stomata 3.1
Next door 3.3 is provided with, is provided with next door 3.3 in cellular micropore 3.4, catalyst coat 3.5 is coated with next door 3.3.
Wherein, the hole count of stomata 3.1 is 600 holes/square inch, and the thickness in next door 3.3 is 0.13 ~ 0.14mm.
First screen pack 2 is made of copper monoxide material, and the second screen pack 8 is made of absorbent charcoal material.By
There is very strong oxidisability in copper monoxide, so when the carbon monoxide with reproducibility is run into moment will be carried out to it
Oxidation, produce and do not pollute the carbon dioxide of air, whole process is exactly a redox process, the second screen pack 8
Can be to 7 untreated CO gas of the first screen pack 2 and the second ceramic honeycomb carrier for the screen pack with activated carbon
Adsorbed.
The coating processes of the honeycomb substrate of the present invention comprise the following steps：
Step 1: dispensing, activated alumina and platinum, rhodium, palladium precious metal solution are mixed 12 hours, obtain percetage by weight first
30-70% mixed solution, percetage by weight 25-60% rare earth is then incorporated, adds percetage by weight 1-5% activearm
Point（Molecular sieve）, percetage by weight 1-5% high-molecular resin solution, percetage by weight 1-5% aluminium glue, percetage by weight 1-
5% rare earth nitrades, stir agglutination in 6 hours；Its middle rare earth is chloride oxygen scavenging material；Active component is high porosity
Molecular sieve；High-molecular resin solution is poly-vinyl alcohol solution, and its water is 1 with material ratio：20.
Step 2: taking slurry, by calculating the area in honeycomb ceramic carrier next door, and then glue in required step one is calculated
The weight of the mixed liquor of shape, quantitative gluey mixed liquor is then taken out with container.
Step 3: coating, honeycomb ceramic carrier is placed in the top of a suction device, suction device and ceramic honey comb carry
The bottom of body is close to, and the obtained slurry of step 3 is poured on into the top surface of honeycomb ceramic carrier, slurry jelly does not possess stream
Dynamic property, positioned at the surface of honeycomb ceramic carrier, now opens suction device, in the presence of suction device, gluey slurry edge
The next door for honeycomb ceramic carrier is attracted to bottom surface from top surface.
Step 4: firing, the stove that the honeycomb ceramic carrier that step 4 is obtained is placed in 550 DEG C fires 3-5 hours.
In step 1, the poly-vinyl alcohol solution as adhesive and the aluminium glue as adsorbent are added, therefore after stirring
Mixed liquor jelly, and the suction device in matching step three can cause slurry to be coated since the top surface of ceramic monolith,
Compared with the existing technique that watery slurry is coated since ceramic monolith bottom, slurry coating of the present invention is uniform, the slurry of coating
Material can be combined fully with ceramic monolith so that the good filtration effect of ceramic monolith
Operation principle：The present invention is fabricated to honeycomb ceramic carrier using cordierite, and is built in exhaust purifier of diesel engine,
The waste gas inlet exhaust gas 4 with black smoke particle of diesel engine discharge enters, by the by-pass filtration of the first screen pack 2, so
Enter the first ceramic honeycomb carrier 3 afterwards and carry out secondary filtration, enter from the opening 3.6 of stomata 3.1, due to stomata 3.1 at one end
It is opening 3.6, and is then closure face 3.2 in the other end, therefore waste gas can be by the next door 3.3 with micropore 3.4, then slave phase
The opening 3.6 of adjacent stomata 3.1 is discharged, and because the diameter of black smoke particle is big compared with micropore 3.4, therefore the black smoke particle in waste gas will be by
Filtering is caught on next door 3.3, and air-flow then passes through from micropore 3.4, enters second from the waste gas of the first ceramic honeycomb carrier 3 discharge
Ceramic honeycomb carrier 7, three-stage filtration is carried out, the same secondary filtration of work principle of filter, is entered from the waste gas of the second ceramic honeycomb carrier 7 discharge
Enter the second screen pack 8 and carry out level Four filtering, the carbon monoxide of residual is adsorbed.
Active rare earth of the catalyst coat 3.5 containing noble metal, Main Ingredients and Appearance have Pt, Pd, Rh, Al2O3、Ce、La、
Zr, Cu, Mn, the waste gas of diesel combustion（The predominantly pernicious gas such as CO, HC, NOx）During through micropore 3.4, next door is coated
Catalyst coat 3.5 on 3.3 will strengthen CO, HC, NOxThe activity of three kinds of gas, it is promoted to carry out certain oxidationreduction
Reaction is learned, wherein CO is oxidized to colourless nontoxic carbon dioxide at high temperature, and HC compounds resolve into water at high temperature
（H2O）And carbon dioxide, NOxIt is reduced into nitrogen and oxygen.
When diesel exhaust gas temperature reaches 375 degrees Celsius, in the presence of catalyst coat 3.5, on next door 3.3
Black smoke particle can progressively burn and aoxidize, and the purifying rate of black smoke particle about reaches more than 85%, is taken the photograph when reaction temperature reaches 500
Catalyst and black smoke particle reaction when family name spends are so that completely burned is fallen（Catalysis burning）, now the purifying rate of black smoke particle is reachable
More than 90%.
Claims (6)
1. a kind of exhaust gas filter of good purification, including Rose Box（1）, it is characterised in that：The Rose Box（1）In cylinder
Shape, Rose Box（1）Interior edge airflow direction is disposed with the first screen pack（2）, the first ceramic honeycomb carrier（3）, second ceramics
Honeycomb substrate（7）With the second screen pack（8）, first ceramic honeycomb carrier（3）With the second ceramic honeycomb carrier（7）Structure phase
Together, and shape and Rose Box（1）It is corresponding, the first ceramic honeycomb carrier（3）Stomata is densely covered with the axial direction（3.1）, the gas
Hole（3.1）One end be opening（3.6）, the other end is provided with closure face（3.2）, the closure face（3.2）And opening（3.6）Between
Every arrangement, the two neighboring stomata（3.1）It is provided with next door（3.3）, next door（3.3）On be provided with cellular micropore
（3.4）, next door（3.3）It is upper to be coated with catalyst coat（3.5）.
A kind of 2. exhaust gas filter of good purification according to claim 1, it is characterised in that：The stomata（3.1）
Hole count be 600 holes/square inch.
A kind of 3. exhaust gas filter of good purification according to claim 1 or 2, it is characterised in that：The next door
（3.3）Thickness be 0.13 ~ 0.14mm.
A kind of 4. exhaust gas filter of good purification according to claim 1, it is characterised in that：First screen pack
（2）It is made of copper monoxide material.
A kind of 5. exhaust gas filter of good purification according to claim 1, it is characterised in that：Second screen pack
（8）It is made of absorbent charcoal material.
A kind of 6. coating processes of the honeycomb substrate of the exhaust gas filter of good purification, it is characterised in that：The coating processes
Comprise the following steps：
Step 1: dispensing, activated alumina and platinum, rhodium, palladium precious metal solution are mixed 12 hours, obtain percetage by weight first
30-70% mixed solution, percetage by weight 25-60% rare earth is then incorporated, adds percetage by weight 1-5% activearm
Point（Molecular sieve）, percetage by weight 1-5% high-molecular resin solution, percetage by weight 1-5% aluminium glue, percetage by weight 1-
5% rare earth nitrades, stir agglutination in 6 hours；Its middle rare earth is chloride oxygen scavenging material；Active component is high porosity
Molecular sieve；High-molecular resin solution is poly-vinyl alcohol solution, and its water is 1 with material ratio：20；
Step 2: taking slurry, by calculating the area in honeycomb ceramic carrier next door, and then calculate gluey in required step one
The weight of mixed liquor, quantitative gluey mixed liquor is then taken out with container；
Step 3: coating, honeycomb ceramic carrier is placed in the top of a suction device, suction device and honeycomb ceramic carrier
Bottom is close to, and the obtained slurry of step 3 is poured on into the top surface of honeycomb ceramic carrier, and slurry jelly does not possess mobility,
Positioned at the surface of honeycomb ceramic carrier, suction device is now opened, in the presence of suction device, gluey slurry is along honeycomb
The next door of ceramic monolith is attracted to bottom surface from top surface；
Step 4: firing, the stove that the honeycomb ceramic carrier that step 4 is obtained is placed in 550 DEG C fires 3-5 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610401837.6A CN107489498A (en) | 2016-06-12 | 2016-06-12 | The exhaust gas filter of good purification and the coating processes of honeycomb substrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610401837.6A CN107489498A (en) | 2016-06-12 | 2016-06-12 | The exhaust gas filter of good purification and the coating processes of honeycomb substrate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109331886A (en) * | 2018-10-30 | 2019-02-15 | 绍兴文理学院 | A kind of catalyst application system and technique applied to industrial tail gas purification |
| CN114225627A (en) * | 2021-12-08 | 2022-03-25 | 上海绿强新材料有限公司 | Combined molecular sieve adsorbent for concentrating and purifying VOCs (volatile organic compounds), method and device |
-
2016
- 2016-06-12 CN CN201610401837.6A patent/CN107489498A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109331886A (en) * | 2018-10-30 | 2019-02-15 | 绍兴文理学院 | A kind of catalyst application system and technique applied to industrial tail gas purification |
| CN114225627A (en) * | 2021-12-08 | 2022-03-25 | 上海绿强新材料有限公司 | Combined molecular sieve adsorbent for concentrating and purifying VOCs (volatile organic compounds), method and device |
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