CN107297139A - The coating processes of trapezoidal exhaust gas filter and honeycomb substrate - Google Patents
The coating processes of trapezoidal exhaust gas filter and honeycomb substrate Download PDFInfo
- Publication number
- CN107297139A CN107297139A CN201610233850.5A CN201610233850A CN107297139A CN 107297139 A CN107297139 A CN 107297139A CN 201610233850 A CN201610233850 A CN 201610233850A CN 107297139 A CN107297139 A CN 107297139A
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- China
- Prior art keywords
- honeycomb
- exhaust gas
- next door
- weight
- percetage
- 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.)
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Classifications
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- 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
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8643—Removing mixtures of carbon monoxide or hydrocarbons and nitrogen oxides
- B01D53/8646—Simultaneous elimination of the components
- B01D53/865—Simultaneous elimination of the components characterised by a specific catalyst
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Abstract
The present invention relates to a kind of trapezoidal exhaust gas filter.It includes Rose Box（1）, the Rose Box（1）Inside it is provided with screen pack（2）And ceramic honeycomb carrier（3）, the coating processes of honeycomb substrate are including Step 1: dispensing；Step 2: taking slurry；Step 3: coating；Step 4: firing.A kind of coating processes of trapezoidal exhaust gas filter and honeycomb substrate of the present invention, under screen pack and ceramic honeycomb carrier 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
Technical field
The present invention relates to a kind of coating processes of trapezoidal exhaust gas filter and honeycomb substrate, for purifying vehicle exhaust.Category
In automobile equipment technical field.
Background technology
At present, common car tail-gas filter, 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, coating slurry is sprayed in ceramic monolith bottom up, and such a technique lacks
Be trapped in：Slurry not only coats difficulty greatly in watery, 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 of trapezoidal exhaust gas filter and honeycomb substrate
Technique, this exhaust gas filter can also filter black smoke particle while CO, HC, NOx pernicious gas in filtering vehicle exhaust, and
Black smoke particle can progressively burn and aoxidize at high temperature；Coating processes are not only coated uniformly, and the slurry coated is carried with ceramics
Physical efficiency is fully combined so that the good filtration effect of ceramic monolith.
The object of the present invention is achieved like this：
A kind of trapezoidal exhaust gas filter, including Rose Box, are characterized in：Screen pack and ceramic honeycomb are provided with the Rose Box
Carrier, the Rose Box includes the first arc-shaped edges, the second arc-shaped edges, the first hypotenuse and the second hypotenuse, first arc-shaped edges, the
Two hypotenuses, the second arc-shaped edges and the first hypotenuse join end to end successively, and connecting place uses round-corner transition, the ceramic honeycomb carrier edge
Axis direction is densely covered with stomata, and one end of the stomata is opening, and the other end is provided with closure face, between the closure face and opening
Every arrangement, the two neighboring stomata, which is provided with next door, next door, to be provided with cellular micropore, and catalyst is coated with next door
Coating.
A kind of trapezoidal exhaust gas filter of the present invention, the hole count of its stomata is 600 holes/square inch.
A kind of trapezoidal 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, is then incorporated percetage by weight 25-60% rare earth, 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, then takes out quantitative gluey mixed liquor 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, 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 into 550 DEG C is fired 3-5 hours.
Compared with prior art, the beneficial effects of the invention are as follows：
A kind of coating processes of trapezoidal exhaust gas filter and honeycomb substrate of the present invention, in screen pack and ceramic honeycomb carrier two-stage mistake
Under filter, by the tail gas that main component is CO, HC, NOx, CO is reacted into2、H2O、N2And O2, while micropore on next door can effective mistake
The black smoke particle in waste gas is filtered, and black smoke particle can be burned off in the presence of catalyst coat, further increase tail gas
Clean-up effect；Added in dispensing after the poly-vinyl alcohol solution as adhesive and the aluminium glue as adsorbent, therefore stirring
Jelly, and the suction device in matching step three can cause slurry to be coated since the top surface of ceramic monolith to mixed liquor, with
The existing technique that watery slurry is coated since ceramic monolith bottom is compared, and slurry coating of the present invention is uniform, the slurry of coating
Can fully it be combined with ceramic monolith so that the good filtration effect of ceramic monolith.
Brief description of the drawings
Fig. 1 is a kind of structural representation of trapezoidal 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.
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,
Screen pack 2,
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 trapezoidal exhaust gas filter, it includes Rose Box 1, screen pack 2 and ceramic honeybee
Nest carrier 3, the left end of Rose Box 1 is inlet exhaust gas 4, and right-hand member is offgas outlet 5, and the screen pack 2 and ceramic honeycomb carrier 3 are set
Put in Rose Box 1, screen pack 2 is at inlet exhaust gas 4, and the Rose Box 1 includes the first arc-shaped edges 1.1, the second arc-shaped edges
1.2nd, the first hypotenuse 1.3 and the second hypotenuse 1.4, first arc-shaped edges 1.1, the second hypotenuse 1.4, the second arc-shaped edges 1.2 and
One hypotenuse 1.3 joins end to end successively, and connecting place uses round-corner transition, 1 pair of shape and the Rose Box of the ceramic honeycomb carrier 3
Should, and ceramic honeycomb carrier 3 is densely covered with stomata 3.1 in the axial direction, one end of the stomata 3.1 is opening 3.6, and the other end is set
The closure face of being equipped with 3.2, the closure face 3.2 and the arranged for interval of opening 3.6, the two neighboring stomata 3.1 are provided with next door
3.3, it 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.
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, is then incorporated percetage by weight 25-60% rare earth, 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, then takes out quantitative gluey mixed liquor with container.
Step 3: coating, honeycomb ceramic carrier is placed in the top of a suction device, suction device is carried with ceramic honey comb
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, and 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 into 550 DEG C is fired 3-5 hours.
In step one, add after the poly-vinyl alcohol solution as adhesive and the aluminium glue as adsorbent, therefore 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,
With it is existing coat the technique of watery slurry since the ceramic monolith bottom compared with, 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 inlet exhaust gas 4 with black smoke particle of Diesel engine discharge enters, by the by-pass filtration of screen pack 2, so
Enter ceramic honeycomb carrier 3 afterwards, enter from the opening 3.6 of stomata 3.1, because stomata 3.1 is opening 3.6 at one end, and another
One end is then closure face 3.2, therefore waste gas can be by the next door 3.3 with micropore 3.4, then from the opening of adjacent air holes 3.1
3.6 discharge, because the diameter of black smoke particle is big compared with micropore 3.4, therefore the black smoke particle in waste gas will catch next door by filtering
On 3.3, air-flow is then passed through from micropore 3.4.
Active rare earth of the catalyst coat 3.5 containing noble metal, Main Ingredients and Appearance has 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, promotes it 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%, when reaction temperature reaches that 500 take the photograph
Catalyst and black smoke particle reaction so as to burn completely when family name spends（Catalysis burning）, now the purifying rate of black smoke particle is reachable
More than 90%.
Claims (4)
1. a kind of trapezoidal exhaust gas filter, including Rose Box（1）, it is characterised in that：The Rose Box（1）Inside it is provided with screen pack
（2）And ceramic honeycomb carrier（3）, the Rose Box（1）Including the first arc-shaped edges（1.1）, the second arc-shaped edges（1.2）, it is first oblique
Side（1.3）With the second hypotenuse（1.4）, first arc-shaped edges（1.1）, the second hypotenuse（1.4）, the second arc-shaped edges（1.2）With
One hypotenuse（1.3）Join end to end successively, connecting place uses round-corner transition, the ceramic honeycomb carrier（3）Gather in the axial direction
There is stomata（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
In cellular micropore（3.4）, next door（3.3）On be coated with catalyst coat（3.5）.
2. a kind of trapezoidal exhaust gas filter according to claim 1, it is characterised in that：The stomata（3.1）Hole count be
600 holes/square inch.
3. a kind of trapezoidal exhaust gas filter according to claim 1 or 2, it is characterised in that：The next door（3.3）Thickness
For 0.13 ~ 0.14mm.
4. a kind of coating processes of the honeycomb substrate of trapezoidal exhaust gas filter, it is characterised in that：The coating processes include following
Step：
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, is then incorporated percetage by weight 25-60% rare earth, 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, then takes out quantitative gluey mixed liquor 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, 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 into 550 DEG C is fired 3-5 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610233850.5A CN107297139A (en) | 2016-04-16 | 2016-04-16 | The coating processes of trapezoidal exhaust gas filter and honeycomb substrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610233850.5A CN107297139A (en) | 2016-04-16 | 2016-04-16 | The coating processes of trapezoidal exhaust gas filter and honeycomb substrate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107297139A true CN107297139A (en) | 2017-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610233850.5A Pending CN107297139A (en) | 2016-04-16 | 2016-04-16 | The coating processes of trapezoidal exhaust gas filter and honeycomb substrate |
Country Status (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108626716A (en) * | 2018-04-24 | 2018-10-09 | 安徽创力生产力促进中心有限公司 | A kind of burner reducing coal dust firing discharge of poisonous waste |
| WO2019001035A1 (en) * | 2017-06-29 | 2019-01-03 | 深圳光启高等理工研究院 | Composite carrier, preparation method therefor and application thereof |
-
2016
- 2016-04-16 CN CN201610233850.5A patent/CN107297139A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019001035A1 (en) * | 2017-06-29 | 2019-01-03 | 深圳光启高等理工研究院 | Composite carrier, preparation method therefor and application thereof |
| CN108626716A (en) * | 2018-04-24 | 2018-10-09 | 安徽创力生产力促进中心有限公司 | A kind of burner reducing coal dust firing discharge of poisonous waste |
| CN108626716B (en) * | 2018-04-24 | 2019-08-09 | 界首市盈丰环保科技有限公司 | A kind of burner reducing coal dust firing discharge of poisonous waste |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171027 |