CN107514303A - The coating processes of exhaust gas filter and honeycomb substrate - Google Patents

The coating processes of exhaust gas filter and honeycomb substrate Download PDF

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Publication number
CN107514303A
CN107514303A CN201610426915.8A CN201610426915A CN107514303A CN 107514303 A CN107514303 A CN 107514303A CN 201610426915 A CN201610426915 A CN 201610426915A CN 107514303 A CN107514303 A CN 107514303A
Authority
CN
China
Prior art keywords
honeycomb
ceramic
carrier
exhaust gas
next door
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610426915.8A
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Chinese (zh)
Inventor
华国金
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JIANGYIN HUAYIN CERAMIC ELECTROMECHANICAL TECHNOLOGY Co Ltd
Original Assignee
JIANGYIN HUAYIN CERAMIC ELECTROMECHANICAL TECHNOLOGY Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JIANGYIN HUAYIN CERAMIC ELECTROMECHANICAL TECHNOLOGY Co Ltd filed Critical JIANGYIN HUAYIN CERAMIC ELECTROMECHANICAL TECHNOLOGY Co Ltd
Priority to CN201610426915.8A priority Critical patent/CN107514303A/en
Publication of CN107514303A publication Critical patent/CN107514303A/en
Pending legal-status Critical Current

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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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/16—Selection of particular materials
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Toxicology (AREA)
  • Catalysts (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

The present invention relates to a kind of exhaust gas filter.It includes Rose Box（1）, the Rose Box（1）Inside it is provided with clarifier（2）And ceramic honeycomb carrier（3）, the coating processes of honeycomb substrate are including Step 1: dispensing；Step 2: take slurry；Step 3: coating；Step 4: fire.The coating processes of a kind of exhaust gas filter of the present invention and honeycomb substrate, under ceramic honeycomb carrier and clarifier double-filtration, by the tail gas that main component is CO, HC, NOx, react into CO2、H2O、N2And O2, while 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；Coating processes are not only coated uniformly, and the slurry coated can be combined fully with ceramic monolith so that the good filtration effect of ceramic monolith.

Description

The coating processes of exhaust gas filter and honeycomb substrate
Technical field
The present invention relates to a kind of exhaust gas filter and the coating processes of honeycomb substrate, for purifying vehicle exhaust.Belong to vapour Vehicle device technical field.
Background technology
At present, common car tail-gas filter, it is using catalyst and NO, NO in vehicle exhaust2Reacted with CO, it is raw Into CO2And N2Both uncontaminated gases, but the automobile of diesel engine is equipped with, due to containing in the tail gas of diesel engine Black smoke particle, existing exhaust gas filter can not effectively filter black smoke particle, can so cause environmental pollution.
Existing honeycomb substrate coating processes are that, in the bottom up injection coating slurry of ceramic monolith, such a technique lacks Be trapped in：Slurry is in watery, and not only coating difficulty is big, and coating slurry can not fully be combined with carrier, the ceramics after coating Carrier 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 a kind of coating work of exhaust gas filter and honeycomb substrate The coating processes of skill, this exhaust gas filter and honeycomb substrate are while CO, HC, NOx pernicious gas in filtering vehicle exhaust Also black smoke particle can be filtered, and black smoke particle can progressively burn and aoxidize at high temperature；Coating processes not only coat uniformly, and The slurry of coating can be combined fully 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, including Rose Box, are characterized in：The Rose Box interior edge airflow direction is disposed with ceramic honeybee Nest carrier and clarifier, the ceramic honeycomb carrier are densely covered with stomata in the axial direction, and one end of the stomata is opening, another End is provided with closure face, and the closure face and open space arrangement, the two neighboring stomata are provided with next door, be provided with next door In cellular micropore, catalyst coat is coated with next door, the ceramic honeycomb carrier is corresponding with the inwall of Rose Box, institute The carbon granules that circular array is provided between the inside and outside wall of clarifier is stated, clarifier is corresponding with the inwall of Rose Box.
A kind of exhaust gas filter of the present invention, the hole count of its stomata is 600 holes/square inch.
A kind of exhaust gas filter of the present invention, the thickness in its next door is 0.13 ~ 0.14mm.
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：
The coating processes of a kind of exhaust gas filter of the present invention and honeycomb substrate, in ceramic honeycomb carrier and clarifier double-filtration Under, by the tail gas that main component is CO, HC, NOx, react into CO2、H2O、N2And O2, while the micropore on next door can be filtered effectively Black smoke particle in waste gas, and black smoke particle can be burned off in the presence of catalyst coat, and it is net to further increase tail gas Change effect；The poly-vinyl alcohol solution as adhesive and the aluminium glue as adsorbent are added in dispensing, thus it is mixed after stirring Close liquid jelly, and the suction device in matching step three, slurry can be caused to be coated since the top surface of ceramic monolith, with showing The technique that some coats watery slurry since ceramic monolith bottom is compared, and slurry of the present invention coating is uniform, the slurry of coating with Ceramic monolith can be combined fully so that the good filtration effect of ceramic monolith.
Brief description of the drawings
Fig. 1 is a kind of structural representation of exhaust gas filter of the present invention.
Fig. 2 is Fig. 1 left view.
Fig. 3 is the schematic cross-section of the ceramic honeycomb carrier of the present invention.
Fig. 4 is the partial axial section figure of the ceramic honeycomb carrier of the present invention.
Fig. 5 is the structural representation in the next door of the ceramic honeycomb carrier of the present invention.
Fig. 6 is the structural representation of the clarifier of the present invention.
In figure：
Rose Box 1,
First arc-shaped edges 1.1,
Second arc-shaped edges 1.2,
First hypotenuse 1.3,
Second hypotenuse 1.4,
Clarifier 2,
Carbon granules 2.1,
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.
Embodiment
Referring to Fig. 1-5, the present invention relates to a kind of exhaust gas filter, and it includes Rose Box 1, clarifier 2 and ceramic honeycomb and carried Body 3, the left end of Rose Box 1 is inlet exhaust gas 4, and right-hand member is offgas outlet 5, and the clarifier 2 and ceramic honeycomb carrier 3 are arranged on In Rose Box 1, ceramic honeycomb carrier 3 is at inlet exhaust gas 4, and clarifier 2 is at offgas outlet 5, and the Rose Box 1 is in circle Tubular, the ceramic honeycomb carrier 3 is corresponding with the inwall of Rose Box 1, and ceramic honeycomb carrier 3 is densely covered with gas in the axial direction Hole 3.1, one end of the stomata 3.1 is opening 3.6, and the other end is provided with closure face 3.2, the closure face 3.2 and opening 3.6 Arranged for interval, the two neighboring stomata 3.1 are provided with next door 3.3, are provided with next door 3.3 in cellular micropore 3.4, next door Catalyst coat 3.5 is coated with 3.3.
The clarifier 2 is in tubular, and the carbon granules of the absorption tail gas of annular array is provided between the inside and outside wall of clarifier 2 2.1, clarifier 2 is corresponding with the inwall of Rose Box 1.
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.
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 diesel engine vent gas purification In device, the waste gas with black smoke particle of diesel engine discharge enters ceramic honeycomb carrier 3 through inlet exhaust gas 4 and carries out one-level mistake Filter, tail gas enters from the opening 3.6 of stomata 3.1, because stomata 3.1 is opening 3.6 at one end, and is then closure face in the other end 3.2, therefore then waste gas can be discharged, due to black by the next door 3.3 with micropore 3.4 from the opening 3.6 of adjacent air holes 3.1 The diameter of smoke particle is big compared with micropore 3.4, therefore the black smoke particle in waste gas will be caught on next door 3.3 by filtering, air-flow then from Micropore 3.4 passes through, from ceramic honeycomb carrier 3 discharge waste gas enter clarifier 2 in carries out secondary filtration, using carbon granules 2.1 come Absorb the pernicious gas of residual.
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 (4)

1. a kind of exhaust gas filter, including Rose Box（1）, it is characterised in that：The Rose Box（1）Interior edge airflow direction is set successively It is equipped with ceramic honeycomb carrier（3）And clarifier（2）, the ceramic honeycomb carrier（3）Stomata is densely covered with the axial direction（3.1）, The stomata（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）Arranged for interval, 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）, the ceramic honeycomb carrier（3）With Rose Box（1）It is interior Wall is corresponding, the clarifier（2）Inside and outside wall between be provided with circular array carbon granules（2.1）, clarifier（2）With filtering Case（1）Inwall it is corresponding.
A kind of 2. exhaust gas filter according to claim 1, it is characterised in that：The stomata（3.1）Hole count be 600 Hole/square inch.
A kind of 3. exhaust gas filter 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. coating processes of the honeycomb substrate of exhaust gas filter, 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.
CN201610426915.8A 2016-06-17 2016-06-17 The coating processes of exhaust gas filter and honeycomb substrate Pending CN107514303A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610426915.8A CN107514303A (en) 2016-06-17 2016-06-17 The coating processes of exhaust gas filter and honeycomb substrate

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Application Number Priority Date Filing Date Title
CN201610426915.8A CN107514303A (en) 2016-06-17 2016-06-17 The coating processes of exhaust gas filter and honeycomb substrate

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CN107514303A true CN107514303A (en) 2017-12-26

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Cited By (1)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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

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Application publication date: 20171226

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