CN106939812A - A kind of stagewise oxidation particle trap and preparation method thereof - Google Patents
A kind of stagewise oxidation particle trap and preparation method thereof Download PDFInfo
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- CN106939812A CN106939812A CN201710211302.7A CN201710211302A CN106939812A CN 106939812 A CN106939812 A CN 106939812A CN 201710211302 A CN201710211302 A CN 201710211302A CN 106939812 A CN106939812 A CN 106939812A
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- fecral
- filtering bodies
- metal mesh
- stagewise
- carrier
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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
- F01N3/02—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
- 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
- F01N13/009—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 having two or more separate purifying devices arranged in series
- F01N13/0097—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 having two or more separate purifying devices arranged in series the purifying devices are arranged in a single housing
-
- 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
- F01N3/08—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
- F01N3/103—Oxidation catalysts for HC and CO only
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention discloses a kind of stagewise oxidation particle trap, the stagewise oxidation particle trap uses the filtering bodies with different arresting efficiencies, and the filter efficiency of the filtering bodies of different stage increases step by step from inlet end to outlet side.The FeCrAl metal mesh shaped carriers of coating catalyst are set before each filtering bodies, during to the FeCrAl metal mesh shaped carriers of the airflow passes containing soot or particle, particle of different sizes, is trapped in different sections of filtering bodies respectively, so as to finally be removed completely or partially；CO, HC are converted and are made the particle burning in stagewise oxidation particle trap by FeCrAl metal mesh shapeds carrier simultaneously.Continuous reconstituted form is also used, the filtering bodies to any of which fillter section are regenerated and have higher CO, HC conversion ratio immediately；Exhaust back pressure can be reduced and reduce engine power loss, due to using multistage filtering, the maximum filtering efficiency of every section of filtering bodies can be given full play to, and its sum of series size can be varied depending on.
Description
Technical field
The technical field of the oxidation particle trap used the present invention relates to a kind of filtering of motor-vehicle tail-gas, more particularly to one
Kind using multistage filtering, CO, HC can converts and make particle burning in oxidation catalytic converter, reduction exhaust back pressure is reduced and sent out
Stagewise oxidation particle trap of motivation power attenuation and preparation method thereof.
Background technology
At present, such as motor vehicle, generating set, ship, the universal machine of the equipment using Diesel engine as power, what it was discharged
Contain substantial amounts of soot, and the various organic substances adhered to it in waste gas, larger can all be caused to human body and environment
Injury.Control to soot or particulate emissions, it is also state where the emphasis and focus of current diesel engine emissions research to be
The object that family's relevant criterion regulation is strictly controlled.
For Diesel engine, emission controls by improving combustion measure (such as closed loop circuit electric jet technology) and external purification measure are employed
(catalytic converter and grain catcher), can reach laws and regulations requirement.But due to only using by-pass filtration body, it is desirable to need one
Whole particulate matters are removed in level filtering bodies.Due to sharing in the absence of trapping task, it can not regenerate well in addition, the time is long
Particle can long afterwards be deposited in filtering bodies, filtering bodies hole can be caused to be blocked, engine can not normally be run, so as to influence it
Life-span.
At present, traditional trap (DPF) typically just installs DOC additional in the front end of filtering bodies（Oxidized form catalyzed conversion
Device）, remaining position no longer sets DOC（Foregoing mode）, the purpose is to eliminate a part of particle thing and CO, HC chemical combination
Thing and improving certain heat to grain catcher regenerates it（Deposited particles are aoxidized）, or coat on trap oxidized form
Catalyst makes particle oxidation regeneration.Such method can not be such that each positions of PDF are regenerated, and so cause hole to block；
Or catalyst is coated on grain catcher, catalyst, which can block a part of hole, causes air penetrability to decline, two kinds of methods of the above
Will increase exhaust back pressure reduction engine power.Also it is to install oil jetting combustion system additional to have some solutions used, and this will
The complexity and cost of system can be increased.
The content of the invention
The invention aims to the shortcoming and defect for overcoming above-mentioned prior art, there is provided a kind of stagewise oxidation particle
Trap, the stagewise oxidation particle trap uses the filtering bodies with different arresting efficiencies, the filtering bodies of different stage
Filter efficiency increases step by step from inlet end to outlet side.The FeCrAl woven wires of coating catalyst are set before each filtering bodies
Shape carrier, during to the FeCrAl metal mesh shaped carriers of the airflow passes containing soot or particle, particle of different sizes is divided
It is not trapped in different sections of filtering bodies, so as to finally be removed completely or partially；While FeCrAl metal mesh shaped carriers
CO, HC are converted and make the particle burning in stagewise oxidation particle trap.The present invention uses continuous reconstituted form, to it
In the filtering bodies of any fillter section regenerated immediately and had higher CO, HC conversion ratio.Caught using the stagewise oxidation particle
Storage, can reduce exhaust back pressure and reduce engine power loss, due to using multistage filtering, can give full play to every section of filtering
The maximum filtering efficiency of body, and its sum of series size can vary depending on.
The technical solution adopted for the present invention to solve the technical problems is：A kind of stagewise oxidation particle trap, including
The filtering bodies of at least two different pore size filters of section, between adjacent head body, the front end of first segment filtering bodies and final section mistake
The rear end of filter body is provided with oxidizing catalytic converter, and each oxidizing catalytic converter is welded to each other with corresponding filtering bodies
Form tubulose or each oxidizing catalytic converter and filtering bodies are pressed into rivet welding formation tubulose in same cylinder.
Further, described oxidizing catalytic converter is carried using the FeCrAl metal mesh shapeds for being coated with catalyst
Body, the inside and surface of FeCrAl metal mesh shaped carriers are coated with catalyst.
Further, the string diameter of described FeCrAl metal mesh shaped carriers is 0.2-0.45mm, FeCrAl density ranges
0.7-1.2g/cm3；The string diameter of FeCrAl metal mesh shaped carriers from first segment to final section is gradually reduced.
Further, described FeCrAl metal mesh shapeds carrier is altogether provided with three sections, and first segment length is 50-150mm；The
Two section length are 30-70mm；Section three, length 10-30mm.Diameter range can be selected arbitrarily.
Further, described catalyst is Pt (Pd)/Cu-AL2O3 catalyst.
Further, described filtering bodies are using the filtering bodies of metal 316 or FeCrAl sintering felt filtering bodies.
Further, described filtering bodies are that FeCrAl sinters felt filtering bodies, and FeCrAl sintering felt filtering bodies are provided with two
It is individual, be respectively in gas access end using the larger primary filter body that can filter bulky grain of pore size filter and rear end using aperture compared with
The secondary filtration body of small energy filter small particles.
Further, the aperture of described primary filter body is 30-60 μm, and length is 40-100mm；Secondary filtration body
Aperture is 5-20 μm, and length is 60-120mm.Diameter range can be selected arbitrarily.
In addition, the invention further relates to a kind of preparation method of stagewise oxidation particle trap, comprising the following steps：
（1）FeCrAl metal mesh shapeds carrier makes：FeCrAl silk screens are rolled into circular and are pressed into carrier cylinder, pass through soldering
Make FeCrAl silk screens and carrier cylinder is firm；
（2）FeCrAl metal mesh shapeds carrier is coated：By FeCrAl metal mesh shapeds carrier in 900 DEG C of high-temperature roastings 3-5 hours
It is standby, slurries are made in Pt (Pd)/Cu-AL2O3 catalyst, the FeCrAl metal mesh shapeds carrier after high-temperature roasting is immersed and starched
3-5 minutes in liquid, then take out FeCrAl metal mesh shapeds carrier blown away with air gun it is many on FeCrAl metal mesh shaped carriers
Remaining slurry liquid, 2-3h is dried at 80-100 DEG C, is finally calcined 3h at 500-550 DEG C；
（3）FeCrAl sintering felt filtering bodies make：Soldering paste is coated with the inwall of filtering bodies cylinder, metal felt is pressed into filtering bodies
In cylinder and make metal felt and filtering bodies cylinder firm by soldering；
（4）The FeCrAl metal mesh shapeds carrier and FeCrAl of each section are sintered into felt filtering bodies pipe is welded together to form with this
Shape, or FeCrAl metal mesh shapeds carrier and FeCrAl the sintering felt filtering bodies of each section are pressed into rivet welding shape in same cylinder successively
Into tubulose, complete.
In summary, stagewise oxidation particle trap of the invention has the following advantages that：
（1）At gas access end using the primary filter body that pore size filter is larger, filter efficiency is relatively low；Thereafter pore size filter is used
The of a relatively high secondary filtration body of relatively small, filter efficiency；Then level reduces filtering pore radius, filter efficiency is improved, so as to reach
To filtration duty is shared, give full play to the efficiency of every section of filtering bodies, carry out the purpose of micro particle catching to greatest extent；
（2）The temperature of filtering bodies, which can quickly be improved, makes it regenerate well, and filtering bodies hole will not be caused to block；Due to using
Multistage filtering, can give full play to the maximum filtering efficiency of every section of filtering bodies, so as to reduce filtering bodies volume；
（3）The front end of each filtering bodies is respectively provided with FeCrAl metal mesh shaped carriers, improves tail gas and catalyst contact probability, plus
Fast response speed and improve to CO, HC conversion ratio and remove size particles；
（4）Tail gas changes airflow direction and improves turbulence by different structure and the FeCrAl metal mesh shaped carriers in aperture,
Further improve conversion ratio.
Brief description of the drawings
Fig. 1 is a kind of structural representation of stagewise oxidation particle trap of the present embodiment 1；
Fig. 2 is the oxidizing catalytic converter structure decomposition figure of the present embodiment 1；
Fig. 3 is the structure decomposition figure of the filtering bodies of the present embodiment 1；
Fig. 4 is that motor vehicle has used the emissions data test chart after the stagewise oxidation particle trap of the present invention.
Embodiment
Embodiment 1
As shown in figure 1, a kind of stagewise oxidation particle trap described by the present embodiment 1, as shown in figure 1, including two sections not
With the filtering bodies 1 of pore size filter, between adjacent head body, the rear end of the front end of first segment filtering bodies and final section filtering bodies
Oxidizing catalytic converter 2 is provided with, each oxidizing catalytic converter is welded to each other to form tubulose with corresponding filtering bodies
Or each oxidizing catalytic converter and filtering bodies are pressed into rivet welding formation tubulose in same cylinder.
The oxidizing catalytic converter is using the FeCrAl metal mesh shaped carriers for being coated with catalyst, FeCrAl wires
The inside and surface of mesh carrier are coated with catalyst.
The string diameter of the FeCrAl metal mesh shaped carriers is 0.2-0.45mm, FeCrAl density ranges 0.7-1.2g/cm3；
The string diameter of FeCrAl metal mesh shaped carriers from first segment to final section is gradually reduced.
The FeCrAl metal mesh shapeds carrier is altogether provided with three sections, and first segment length is 50-150mm；Second section length is 30-
70mm；Section three, length 10-30mm.Diameter range can be selected arbitrarily.
The catalyst is Pt (Pd)/Cu-AL2O3 catalyst.
The filtering bodies are that FeCrAl sinters felt filtering bodies, and FeCrAl sintering felt filtering bodies are provided with two, are respectively in gas
Body arrival end can filter small using the larger primary filter body that can filter bulky grain of pore size filter and rear end using aperture is smaller
The secondary filtration body of grain.
The aperture of the primary filter body is 30-60 μm, and length is 40-100mm；The aperture of secondary filtration body is 5-20 μm,
Length is 60-120mm.Diameter range can be selected arbitrarily.
In addition, the invention further relates to a kind of preparation method of stagewise oxidation particle trap, comprising the following steps：
（1）FeCrAl metal mesh shapeds carrier makes：FeCrAl silk screens 3 are rolled into circular and are pressed into carrier cylinder 4, pass through pricker
Weldering makes FeCrAl silk screens and carrier cylinder firmly, as shown in Figure 2；
（2）FeCrAl metal mesh shapeds carrier is coated：By FeCrAl metal mesh shapeds carrier in 900 DEG C of high-temperature roastings 3-5 hours
It is standby, slurries are made in Pt (Pd)/Cu-AL2O3 catalyst, the FeCrAl metal mesh shapeds carrier after high-temperature roasting is immersed and starched
3-5 minutes in liquid, then take out FeCrAl metal mesh shapeds carrier blown away with air gun it is many on FeCrAl metal mesh shaped carriers
Remaining slurry liquid, 2-3h is dried at 80-100 DEG C, is finally calcined 3h at 500-550 DEG C；
（3）FeCrAl sintering felt filtering bodies make：Soldering paste is coated with the inwall of filtering bodies cylinder 6, metal felt 5 is pressed into filtering
Make metal felt firm with filtering bodies cylinder in body cylinder and by soldering, as shown in Figure 3；
（4）The FeCrAl metal mesh shapeds carrier and FeCrAl of each section are sintered into felt filtering bodies pipe is welded together to form with this
Shape, or FeCrAl metal mesh shapeds carrier and FeCrAl the sintering felt filtering bodies of each section are pressed into rivet welding shape in same cylinder successively
Into tubulose, complete.
Motor vehicle has used the emissions data after the stagewise oxidation particle trap of the present invention as shown in Figure 4.
The above, is only presently preferred embodiments of the present invention, not makees any formal to the structure of the present invention
Limitation.Any simple modification, equivalent variations and modification that every technical spirit according to the present invention is made to above example,
In the range of still falling within technical scheme.
Claims (9)
1. a kind of stagewise oxidation particle trap, it is characterised in that include the filtering bodies of the different pore size filters of at least two sections, in
Between adjacent head body, the rear end of the front end of first segment filtering bodies and final section filtering bodies be provided with oxidized form catalyzed conversion
Device, each oxidizing catalytic converter be welded to each other with corresponding filtering bodies to be formed tubulose or each oxidizing catalytic converter and
Filtering bodies are pressed into rivet welding formation tubulose in same cylinder.
2. a kind of stagewise oxidation particle trap according to claim 1, it is characterised in that described oxidized form catalysis
Converter is using the FeCrAl metal mesh shaped carriers for being coated with catalyst, the inside and surface of FeCrAl metal mesh shaped carriers
It is coated with catalyst.
3. a kind of stagewise oxidation particle trap according to claim 2, it is characterised in that described FeCrAl metals
The string diameter of mesh-like carrier is 0.2-0.45mm, FeCrAl density ranges 0.7-1.2g/cm3；From first segment to final section
The string diameter of FeCrAl metal mesh shaped carriers is gradually reduced.
4. a kind of stagewise oxidation particle trap according to claim 3, it is characterised in that described FeCrAl metals
Mesh-like carrier is altogether provided with three sections, and first segment length is 50-150mm；Second section length is 30-70mm；Section three, length 10-
30mm。
5. a kind of stagewise oxidation particle trap according to claim 4, it is characterised in that described catalyst is Pt
(Pd)/Cu-AL2O3 catalyst.
6. a kind of stagewise oxidation particle trap according to claim 1 to 5 any one, it is characterised in that described
Filtering bodies using the filtering bodies of metal 316 or FeCrAl sintering felt filtering bodies.
7. a kind of stagewise oxidation particle trap according to claim 6, it is characterised in that described filtering bodies are
FeCrAl sinters felt filtering bodies, and FeCrAl sintering felt filtering bodies are provided with two, are respectively to use filter bores in gas access end
The larger primary filter body that can filter bulky grain in footpath and rear end use the secondary filtration body of the smaller energy filter small particles in aperture.
8. a kind of stagewise oxidation particle trap according to claim 7, it is characterised in that described primary filter body
Aperture be 30-60 μm, length is 40-100mm；The aperture of secondary filtration body is 5-20 μm, and length is 60-120mm.
9. a kind of preparation method of stagewise oxidation particle trap according to claim 8, it is characterised in that including such as
Lower step：
（1）FeCrAl metal mesh shapeds carrier makes：FeCrAl silk screens are rolled into circular and are pressed into carrier cylinder, pass through soldering
Make FeCrAl silk screens and carrier cylinder is firm；
（2）FeCrAl metal mesh shapeds carrier is coated：By FeCrAl metal mesh shapeds carrier in 900 DEG C of high-temperature roastings 3-5 hours
It is standby, slurries are made in Pt (Pd)/Cu-AL2O3 catalyst, the FeCrAl metal mesh shapeds carrier after high-temperature roasting is immersed and starched
3-5 minutes in liquid, then take out FeCrAl metal mesh shapeds carrier blown away with air gun it is many on FeCrAl metal mesh shaped carriers
Remaining slurry liquid, 2-3h is dried at 80-100 DEG C, is finally calcined 3h at 500-550 DEG C；
（3）FeCrAl sintering felt filtering bodies make：Soldering paste is coated with the inwall of filtering bodies cylinder, metal felt is pressed into filtering bodies
In cylinder and make metal felt and filtering bodies cylinder firm by soldering；
（4）The FeCrAl metal mesh shapeds carrier and FeCrAl of each section are sintered into felt filtering bodies pipe is welded together to form with this
Shape, or FeCrAl metal mesh shapeds carrier and FeCrAl the sintering felt filtering bodies of each section are pressed into rivet welding shape in same cylinder successively
Into tubulose, complete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710211302.7A CN106939812A (en) | 2017-04-01 | 2017-04-01 | A kind of stagewise oxidation particle trap and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710211302.7A CN106939812A (en) | 2017-04-01 | 2017-04-01 | A kind of stagewise oxidation particle trap and preparation method thereof |
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| Publication Number | Publication Date |
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| CN106939812A true CN106939812A (en) | 2017-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710211302.7A Pending CN106939812A (en) | 2017-04-01 | 2017-04-01 | A kind of stagewise oxidation particle trap and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108273637A (en) * | 2018-02-09 | 2018-07-13 | 庞凯 | A kind of gradient fractionation purification system of turbine classifier and silicon dioxide ultrafine powder |
| CN108706987A (en) * | 2018-09-03 | 2018-10-26 | 洛阳理工学院 | A kind of ceramic honey comb particulate filter and preparation method thereof |
| CN110836135A (en) * | 2018-08-16 | 2020-02-25 | 北京纳米能源与系统研究所 | Particulate matter capture device and exhaust gas purification system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108273637A (en) * | 2018-02-09 | 2018-07-13 | 庞凯 | A kind of gradient fractionation purification system of turbine classifier and silicon dioxide ultrafine powder |
| CN110836135A (en) * | 2018-08-16 | 2020-02-25 | 北京纳米能源与系统研究所 | Particulate matter capture device and exhaust gas purification system |
| CN108706987A (en) * | 2018-09-03 | 2018-10-26 | 洛阳理工学院 | A kind of ceramic honey comb particulate filter and preparation method thereof |
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Application publication date: 20170711 |
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