CN107304694A - The coating processes of noise reducing type exhaust gas filter and honeycomb substrate - Google Patents

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

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Publication number
CN107304694A
CN107304694A CN201610249239.1A CN201610249239A CN107304694A CN 107304694 A CN107304694 A CN 107304694A CN 201610249239 A CN201610249239 A CN 201610249239A CN 107304694 A CN107304694 A CN 107304694A
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China
Prior art keywords
honeycomb
filter
gas
reducing type
noise reducing
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CN201610249239.1A
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Chinese (zh)
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华玉娣
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Individual
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Individual
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Priority to CN201610249239.1A priority Critical patent/CN107304694A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • 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
    • F01N13/007—Apparatus used as intake or exhaust silencer
    • 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
    • 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
    • F01N3/0222—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 the structure being monolithic, e.g. honeycombs
    • 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
    • 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
    • F01N2230/00—Combination of silencers and other devices
    • F01N2230/02—Exhaust 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
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
    • 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
    • F01N2330/02—Metallic plates or honeycombs, e.g. superposed or rolled-up corrugated or otherwise deformed sheet metal
    • F01N2330/04—Methods of manufacturing
    • 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
    • F01N2570/14—Nitrogen oxides

Landscapes

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

Abstract

The present invention relates to a kind of noise reducing type exhaust gas filter.It includes downtake pipe（2）, " mouth " font gas-distributing pipe（3）And second exhaust pipe（4）, gas-distributing pipe（3）Inside it is provided with filter（1）, filter（1）Including cylinder（1.1）, cylinder（1.1）Inside it is provided with screen pack（1.2）And ceramic honeycomb carrier（1.3）, the coating processes of honeycomb substrate are including Step 1: dispensing；Step 2: taking slurry；Step 3: coating；Step 4: firing.The coating processes of a kind of noise reducing type exhaust gas filter of the present invention and honeycomb substrate, tail gas point two-way enters filter progress double-filtration in the presence of gas-distributing pipe, and tail gas is reacted into CO2、H2The black smoke particle in micro porous filtration waste gas on O, next door, the tail gas after filtering enters the noise reduction disk noise reduction of second exhaust pipe；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 noise reducing type exhaust gas filter and honeycomb substrate
Technical field
The present invention relates to a kind of noise reducing type exhaust gas filter and the coating processes of honeycomb substrate, for purifying vehicle exhaust. Belong to automobile equipment technical field.
Background technology
At present, the coating processes of common automobile noise reduction type exhaust gas filter and honeycomb substrate, are to use catalyst and vapour NO, NO in tail gas2Reacted with CO, generate CO2And N2Both uncontaminated gases, but it is equipped with the automobile of Diesel engine, Due to containing black smoke particle, the coating processes of existing noise reducing type exhaust gas filter and honeycomb substrate in the tail gas of Diesel engine Black smoke particle can not be effectively filtered, environmental pollution can be so caused；Huge noise is also produced in automobilism, influence people's Daily life.
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 the painting of a kind of noise reducing type exhaust gas filter and honeycomb substrate CO, HC, the NOx of the coating processes of coating process, this noise reducing type exhaust gas filter and honeycomb substrate in filtering vehicle exhaust are harmful to Also black smoke particle can be filtered while gas, and black smoke particle can progressively burn and aoxidize at high temperature, and can be effective Reduce noise during automobile exhaust；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.
The object of the present invention is achieved like this：
A kind of noise reducing type exhaust gas filter, is characterized in：The coating processes bag of the noise reducing type exhaust gas filter and honeycomb substrate The downtake pipe of connection automobile engine is included, and connects the gas-distributing pipe of " mouth " font of downtake pipe, and connection gas-distributing pipe Second exhaust pipe, the noise reduction circle for being provided with and axially fastening in filter, the second exhaust pipe is provided with the gas-distributing pipe Disk, the noise reduction disk is provided with main gas port and point gas port, and the filter includes setting successively along airflow direction in cylinder, cylinder Screen pack and ceramic honeycomb carrier are equipped with, the ceramic honeycomb carrier is corresponding with the inwall of cylinder, and 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 noise reducing type exhaust gas filter of the present invention, its filter and downtake pipe joint and filter and second row Tracheae joint is welded with air guide leaf.
A kind of noise reducing type exhaust gas filter of the present invention, its main gas port has one, and described point of gas port has multiple and arrangement to be in three It is angular.
A kind of noise reducing type exhaust gas filter of the present invention, the hole count of its stomata is 600 holes/square inch.
A kind of noise reducing type 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：
Tail gas point two-way enters filter in the presence of a kind of noise reducing type exhaust gas filter of the present invention, gas-distributing pipe, in screen pack and Under ceramic honeycomb carrier double-filtration, by the tail gas that main component is CO, HC, NOx, CO is reacted into2、H2O、N2And O2, with after Micropore on wall can effectively filter the black smoke particle in waste gas, and black smoke particle can be burned in the presence of catalyst coat Fall, further increase tail gas clean-up effect；Provided with the noise reduction disk axially fastened in second exhaust pipe, on the noise reduction disk Provided with main gas port and point gas port, noise during automobile exhaust can be effectively reduced；Added in dispensing as the poly- of adhesive Glycohol solution and the aluminium glue as adsorbent, thus stirring after mixed liquor jelly, and in matching step three suction dress Put, slurry can be caused to be coated since the top surface of ceramic monolith, watery slurry is coated since ceramic monolith bottom with existing The technique of material 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 ceramic monolith Good filtration effect.
Brief description of the drawings
Fig. 1 is a kind of structural representation of noise reducing type exhaust gas filter of the invention.
Fig. 2 is the structural representation of the filter of the present invention.
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 noise reduction disk of the present invention.
In figure：
Filter 1,
Cylinder 1.1
Screen pack 1.2,
Ceramic honeycomb carrier 1.3,
Stomata 1.3.1,
Closure face 1.3.2,
Next door 1.3.3,
Micropore 1.3.4,
Catalyst coat 1.3.5
Be open 1.3.6,
Inlet exhaust gas 1.4,
Offgas outlet 1.5,
Downtake pipe 2,
Gas-distributing pipe 3,
Second exhaust pipe 4,
Noise reduction disk 5,
Main gas port 5.1,
Divide gas port 5.2,
Air guide leaf 6,
Tail gas 7.
Embodiment
Referring to Fig. 1, the present invention relates to a kind of noise reducing type exhaust gas filter, it includes the first exhaust of connection automobile engine Pipe 2, and the gas-distributing pipe 3 of " mouth " font of downtake pipe 2 is connected, and connect the second exhaust pipe of the gas-distributing pipe 3 of " mouth " font 4, filter 1 is provided with " mouth " the font gas-distributing pipe 3, and it is engaged with the joint of downtake pipe 2 and with second exhaust pipe 4 Place is welded with air guide leaf 6.
The noise reduction disk 5 axially fastened referring to being provided with second exhaust pipe described in Fig. 64, the noise reduction disk 5 is provided with Main gas port 5.1 and point gas port 5.2, the main gas port 5.1 have one, and described point of gas port 5.2 arranges triangular in shape.
Referring to Fig. 2, the filter 1 includes being disposed with screen pack 1.2 along airflow direction in cylinder 1.1, cylinder 1.1 With ceramic honeycomb carrier 1.3, the left end of cylinder 1.1 is inlet exhaust gas 1.4, and right-hand member is offgas outlet 1.5, in the He of screen pack 1.2 In the presence of ceramic honeycomb carrier 1.3, vehicle exhaust can be effectively filtered, it is to avoid atmosphere pollution.
Referring to Fig. 3-5, the ceramic honeycomb carrier 1.3 is corresponding with the inwall of cylinder 1.1, and ceramic honeycomb carrier 1.3 The one end for being densely covered with stomata 1.3.1, the stomata 1.3.1 in the axial direction is opening 1.3.6, and the other end is provided with closure face 1.3.2, the closure face 1.3.2 and opening 1.3.6 arranged for interval, the two neighboring stomata 1.3.1 are provided with next door 1.3.3, it is provided with the 1.3.3 of next door in cellular micropore 1.3.4, catalyst coat 1.3.5 is coated with the 1.3.3 of next door.
Wherein, stomata 1.3.1 hole count is 600 holes/square inch, and next door 1.3.3 thickness 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 the filter 1 of diesel engine Interior, the waste gas with black smoke particle of Diesel engine discharge enters downtake pipe 2, in the presence of air guide leaf 6, separates two Road enters in the filter 1 in gas-distributing pipe 3, and tail gas carries out by-pass filtration when by screen pack 2, then from stomata 1.3.1's The 1.3.6 that is open enters ceramic honeycomb carrier 1.3, because stomata 1.3.1 is opening 1.3.6 at one end, and in the other end then It is closure face 1.3.2, therefore waste gas can be by the next door 1.3.3 with micropore 1.3.4, then opening from adjacent air holes 1.3.1 Mouth 1.3.6 is discharged, because the diameter of black smoke particle is big compared with micropore 1.3.4, therefore the black smoke particle in waste gas will be caught by filtering On next door 1.3.3, air-flow is then passed through from micropore 1.3.4, and the tail gas discharged from ceramic honeycomb carrier 1.3 enters second exhaust pipe 4, in the presence of noise reduction disk 5, it can effectively reduce noise during automobile exhaust.
The catalyst coat 1.3.5 contains the active rare earth of noble metal, and 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 1.3.4, it is coated in Catalyst coat 1.3.5 on the 1.3.3 of next door will strengthen CO, HC, NOxThe activity of three kinds of gas, promotes it to carry out certain oxygen Change-reduction chemical reaction, wherein CO is oxidized to colourless nontoxic carbon dioxide at high temperature, and HC compounds are divided at high temperature Xie Chengshui（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 1.3.5, next door 1.3.3 On black smoke particle can progressively burn and aoxidize, the purifying rate of black smoke particle about reaches more than 85%, when reaction temperature reaches 500 Degree Celsius when catalyst and black smoke particle reaction so as to burning completely（Catalysis burning）, now the purifying rate of black smoke particle is reachable More than 90%.

Claims (6)

1. a kind of noise reducing type exhaust gas filter, it is characterised in that：The coating work of the noise reducing type exhaust gas filter and honeycomb substrate Skill includes the downtake pipe of connection automobile engine（2）, and connection downtake pipe（2）" mouth " font gas-distributing pipe（3）, And connection gas-distributing pipe（3）Second exhaust pipe（4）, the gas-distributing pipe（3）Inside it is provided with filter（1）, the second exhaust pipe （4）Inside it is provided with the noise reduction disk axially fastened（5）, the noise reduction disk（5）It is provided with main gas port（5.1）With a point gas port （5.2）, the filter（1）Including cylinder（1.1）, cylinder（1.1）It is interior to be disposed with screen pack along airflow direction（1.2）With Ceramic honeycomb carrier（1.3）, the ceramic honeycomb carrier（1.3）With cylinder（1.1）Inwall it is corresponding, and ceramic honeycomb carrier （1.3）Stomata is densely covered with the axial direction（1.3.1）, the stomata（1.3.1）One end be opening（1.3.6）, the other end sets The closure face of being equipped with（1.3.2）, the closure face（1.3.2）And opening（1.3.6）Arranged for interval, the two neighboring stomata （1.3.1）It is provided with next door（1.3.3）, next door（1.3.3）On be provided with cellular micropore（1.3.4）, next door（1.3.3）On It is coated with catalyst coat（1.3.5）.
2. a kind of noise reducing type exhaust gas filter according to claim 1, it is characterised in that：Filter（1）With first exhaust Pipe（2）Joint and filter（1）With second exhaust pipe（4）Joint is welded with air guide leaf（6）.
3. a kind of noise reducing type exhaust gas filter according to claim 1 or 2, it is characterised in that：The main gas port（5.1）Have One, described point of gas port（5.2）Have multiple and arrange triangular in shape.
4. a kind of noise reducing type exhaust gas filter according to claim 1, it is characterised in that：The stomata（1.3.1）Hole Number is 600 holes/square inch.
5. a kind of noise reducing type exhaust gas filter according to claim 1, it is characterised in that：The next door（1.3.3）Thickness Spend for 0.13 ~ 0.14mm.
6. a kind of coating processes of the honeycomb substrate of noise reducing type exhaust gas filter, it is characterised in that：The coating processes include with Lower 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.
CN201610249239.1A 2016-04-21 2016-04-21 The coating processes of noise reducing type exhaust gas filter and honeycomb substrate Pending CN107304694A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109441595A (en) * 2018-10-31 2019-03-08 四川特微能科技有限公司 Terahertz exhaust gas processing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109441595A (en) * 2018-10-31 2019-03-08 四川特微能科技有限公司 Terahertz exhaust gas processing device

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Application publication date: 20171031