CN107542516A - Diesel exhaust filtration device - Google Patents
Diesel exhaust filtration device Download PDFInfo
- Publication number
- CN107542516A CN107542516A CN201610470447.4A CN201610470447A CN107542516A CN 107542516 A CN107542516 A CN 107542516A CN 201610470447 A CN201610470447 A CN 201610470447A CN 107542516 A CN107542516 A CN 107542516A
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- CN
- China
- Prior art keywords
- honeycomb carrier
- filtration device
- ceramic honeycomb
- diesel exhaust
- rose box
- 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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- Processes For Solid Components From Exhaust (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The present invention relates to a kind of diesel exhaust filtration device.It includes Rose Box（1）, the Rose Box（1）Interior edge air-flow is provided with oxidation catalyst（2）And ceramic honeycomb carrier（3）, Rose Box（1）Inner surface be coated with silica heat insulating coat, oxidation catalyst（2）And ceramic honeycomb carrier（3）Outer surface be provided with heat-insulating and shock-absorbing layer（7）, ceramic honey comb surface is coated with acid-proof coating.A kind of diesel exhaust filtration device of the present invention, acid resistance is good, under ceramic honeycomb carrier and oxidation catalyst double-filtration, by the tail gas that main component is CO, HC, NOx, reacts into CO2、H2O、N2And O2, while the micropore on next door can effectively filter the carbon soot particles in waste gas, and carbon soot particles can be burned off in the presence of catalyst coat, further increase tail gas clean-up effect.
Description
Technical field
The present invention relates to a kind of diesel exhaust filtration device, for purifying vehicle exhaust.Belong to automobile equipment technical field.
Background technology
At present, common diesel engine of vehicle exhaust gas filter, its discharge pollutant in containing soot particulate (PM),
Hydro carbons (HC), CO and NOxDeng.Because O in tail gas2Content is higher, therefore HC and CO discharge capacitys are less, and the 1/ of general only gasoline engine
10, NOxDischarge capacity is roughly the same with gasoline engine, and PM discharge capacity is about tens times of gasoline engine, therefore existing diesel engine
Exhaust gas filter can not effectively filter soot particulate, and the tail gas so discharged has a large amount of black smokes, cause environmental pollution, existing
Honeycomb substrate can not be effectively acidproof, cause its service life short, can not meet the needs of client.
The content of the invention
It is an object of the invention to overcome above-mentioned deficiency, there is provided a kind of diesel exhaust filtration device, this diesel engine vent gas
CO, HC, the NO of filter in vehicle exhaust is filteredxAlso carbon soot particles, and carbon at high temperature can be filtered while pernicious gas
Smoke particle can progressively burn and aoxidize, and the regeneration of ceramic honeycomb carrier be realized by diesel vehicle own temperature, honeycomb substrate can have
Imitate acidproof.
The object of the present invention is achieved like this：
A kind of diesel exhaust filtration device, including Rose Box, are characterized in：The inner surface of the Rose Box is coated with silica
Heat insulating coat, the diesel exhaust filtration device also include oxidation catalyst and ceramic honeycomb carrier, the oxidized form catalysis
Device and ceramic honeycomb carrier are successively set in Rose Box along air-flow, the appearance of the oxidation catalyst and ceramic honeycomb carrier
Face is provided with heat-insulating and shock-absorbing layer, and the ceramic honeycomb carrier is corresponding with the inwall of Rose Box, and ceramic honeycomb carrier is along axle
Line direction is densely covered with stomata, and one end of the stomata is opening, and the other end is provided with closure face, the closure face and open space
Arrangement, the two neighboring stomata is provided with next door, is provided with next door in cellular micropore, is applied on next door coated with catalyst
Layer, the honeycomb substrate surface are coated with acid-proof coating, and this acid-proof coating is mainly made up of following raw materials by weight portion proportioning：
13 parts of quartz sand, 12 parts of petroleum coke, 9 parts of wood chip, 8 parts of sodium chloride, 1 part of titanium dioxide, 13 parts of ethanol, 30 parts of water；
The preparation method of the acid-proof coating, is comprised the steps of：
（1）Quartz sand, petroleum coke and wood chip are pulverized, powder diameter is 400 mesh；
（2）By step（1）In powder and sodium chloride powder the input high temperature resistance furnace of acquisition, radiant heating, temperature is maintained at
1000 DEG C, 0.5 hour；
（3）Through step（2）Powder after pyrolytic semlting is with titania powder by weight 3:It is added to the water after 1 mixing, while stirring
Mix side and add ethanol thereto, microelectronics surface acid-proof coating can be obtained to all dissolvings.
A kind of diesel exhaust filtration device of the present invention, the hole count of its stomata is 600 holes/square inch.
A kind of diesel exhaust filtration device of the present invention, the thickness in its next door is 0.13 ~ 0.14mm.
A kind of diesel exhaust filtration device of the present invention, its heat-insulating and shock-absorbing layer are made up of woven wire and ceramic fiber cloth, gold
Category silk screen is arranged in ceramic fiber cloth, and woven wire contacts with filtering chamber interior wall, ceramic fiber cloth and oxidation catalyst and
Ceramic honeycomb carrier contacts.
A kind of diesel exhaust filtration device of the present invention, its woven wire are stainless steel cloth or fine copper net, string diameter 0.12mm ~
0.25mm, aperture 0.2mm ~ 0.42mm.
Compared with prior art, the beneficial effects of the invention are as follows：
A kind of diesel exhaust filtration device of the present invention, harmful components HC, CO in tail gas in the presence of oxidation catalyst and
Soot particulate（PM）In organic matter enter oxidation catalyst carry out by-pass filtration, be oxidized under catalyst action
CO2And water, NO are then oxidized to the stronger NO of reducing property2, then in the presence of ceramic honeycomb carrier, the soot in waste gas
Particle will be caught on next door by filtering, and in the presence of hot conditions catalyst coat, carbon soot particles can progressively burn and
Oxidation, the regeneration of ceramic honeycomb carrier is realized by diesel vehicle own temperature, further increases tail gas clean-up effect；The present invention
Method by the way that Raw material processing is sprayed into aqua, one kind, which is prepared, can be sprayed directly on ceramic honey comb surface, form one layer
The fine and close, protective layer of consolidation.
Brief description of the drawings
Fig. 1 is a kind of structural representation of diesel exhaust filtration device of the present invention.
Fig. 2 is the schematic cross-section of the ceramic honeycomb carrier of the present invention.
Fig. 3 is the partial axial section figure of the ceramic honeycomb carrier of the present invention.
Fig. 4 is the structural representation in the next door of the ceramic honeycomb carrier of the present invention.
In figure：
Rose Box 1,
Oxidation catalyst 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,
Heat-insulating and shock-absorbing layer 7.
Embodiment
Referring to Fig. 1-4, the present invention relates to a kind of diesel exhaust filtration device, and it includes Rose Box 1, oxidation catalyst 2
With ceramic honeycomb carrier 3, the left end of Rose Box 1 is inlet exhaust gas 4, and right-hand member is offgas outlet 5, the He of oxidation catalyst 2
Ceramic honeycomb carrier 3 is arranged in Rose Box 1, and ceramic honeycomb carrier 3 is at inlet exhaust gas 4, and oxidation catalyst 2 is close to tail
At gas outlet 5, the Rose Box 1 is in tubular, and the ceramic honeycomb carrier 3 is corresponding with the inwall of Rose Box 1, and ceramic honeybee
Nest carrier 3 is densely covered with stomata 3.1 in the axial direction, and one end of the stomata 3.1 is opening 3.6, and the other end is provided with closure face
3.2, the closure face 3.2 and the arranged for interval of opening 3.6, the two neighboring stomata 3.1 are provided with next door 3.3, on next door 3.3
It is in cellular micropore 3.4 to be provided with, and catalyst coat 3.5 is coated with next door 3.3.
The inner surface of the Rose Box 1 is coated with silica heat insulating coat, diesel fuel filter is had heat-blocking action, can
Temperature in diesel fuel filter is improved, improves catalyst effect.
The outer surface of the oxidation catalyst 2 and ceramic honeycomb carrier 3 is provided with heat-insulating and shock-absorbing layer 7, makes oxidized form
The inwall of catalyst converter 2 and ceramic honeycomb carrier 3 and Rose Box 1 is Elastic Contact, it is possible to reduce expands with heat and contract with cold and oxidized form is catalyzed
The influence of device 2 and the mechanical performance of ceramic honeycomb carrier 3, heat-insulating and shock-absorbing layer 7 is respectively in oxidation catalyst and particulate filter
Two ends flanging, heat-insulating and shock-absorbing layer 7 is separately fixed in oxidation catalyst 2 and ceramic honeycomb carrier 3, heat-insulating and shock-absorbing layer 7
It is made up of woven wire and ceramic fiber cloth, woven wire is arranged in ceramic fiber cloth, and woven wire connects with the inwall of Rose Box 1
To touch, ceramic fiber cloth contacts with oxidation catalyst 2 and ceramic honeycomb carrier 3, and woven wire is stainless steel cloth or fine copper net,
String diameter 0.12mm ~ 0.25mm, aperture 0.2mm ~ 0.42mm.Coated with composition it is Al in ceramic fiber cloth2O3:35% ~ 45%, SiO2:
44% ~ 54%, ZrO2:0% ~ 15%, thermal conductivity factor：About 0.08W/mk at 600 DEG C, thickness 0.5mm ~ 4mm.
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 ceramic honey comb surface is coated with acid-proof coating, and this acid-proof coating is mainly matched by following raw materials by weight portion
It is made：13 parts of quartz sand, 12 parts of petroleum coke, 9 parts of wood chip, 8 parts of sodium chloride, 1 part of titanium dioxide, 13 parts of ethanol, 30 parts of water.
The preparation method of the acid-proof coating, is comprised the steps of：
（1）Quartz sand, petroleum coke and wood chip are pulverized, powder diameter is 400 mesh；
（2）By step（1）In powder and sodium chloride powder the input high temperature resistance furnace of acquisition, radiant heating, temperature is maintained at
1000 DEG C, 0.5 hour；
（3）Through step（2）Powder after pyrolytic semlting is with titania powder by weight 3:It is added to the water after 1 mixing, while stirring
Mix side and add ethanol thereto, microelectronics surface acid-proof coating can be obtained to all dissolvings.
Operation principle：This diesel exhaust filtration device is connected with aiutage, when the engine operates, the tail of engine discharge
Gas is by entering diesel exhaust filtration device, harmful components HC, CO and soot particulate in tail gas（PM）In organic matter enter
Enter oxidation catalyst 2 and carry out by-pass filtration, CO is oxidized under catalyst action2And water, NO are then oxidized to reproducibility
The stronger NO of energy2, enter ceramic honeycomb carrier 3 through inlet exhaust gas 4 from the tail gas that oxidation catalyst 2 excludes and carry out two 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 carbon 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 carbon soot particles in waste gas will be caught on next door 3.3 by filtering, air-flow then from
Micropore 3.4 passes through.
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
Carbon soot particles can progressively burn and aoxidize, and the purifying rate of carbon soot particles about reaches more than 85%, is taken the photograph when reaction temperature reaches 500
Catalyst and carbon soot particles reaction are so that completely burned is fallen when family name spends（Catalysis burning）, now the purifying rate of carbon soot particles is reachable
More than 90%.
Claims (5)
1. a kind of diesel exhaust filtration device, including Rose Box（1）, it is characterised in that：The Rose Box（1）Inner surface coating
There is silica heat insulating coat, the diesel exhaust filtration device also includes oxidation catalyst（2）And ceramic honeycomb carrier
（3）, the oxidation catalyst（2）And ceramic honeycomb carrier（3）Rose Box is successively set on along air-flow（1）It is interior, the oxidation
Type catalyst converter（2）And ceramic honeycomb carrier（3）Outer surface be provided with heat-insulating and shock-absorbing layer（7）, the ceramic honeycomb carrier（3）
With Rose Box（1）Inwall it is corresponding, and 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）Interval
Arrangement, the two neighboring stomata（3.1）It is provided with next door（3.3）, next door（3.3）On be provided with cellular micropore（3.4）,
Next door（3.3）It is upper to be coated with catalyst coat（3.5）, the ceramic honey comb surface is coated with acid-proof coating, this acid-proof coating master
To be matched and be made by following raw materials by weight portion：13 parts of quartz sand, 12 parts of petroleum coke, 9 parts of wood chip, 8 parts of sodium chloride, titanium dioxide
1 part of titanium, 13 parts of ethanol, 30 parts of water；
The preparation method of the acid-proof coating, is comprised the steps of：
（1）Quartz sand, petroleum coke and wood chip are pulverized, powder diameter is 400 mesh；
（2）By step（1）In powder and sodium chloride powder the input high temperature resistance furnace of acquisition, radiant heating, temperature is maintained at
1000 DEG C, 0.5 hour；
（3）Through step（2）Powder after pyrolytic semlting is with titania powder by weight 3:It is added to the water after 1 mixing, while stirring
Mix side and add ethanol thereto, microelectronics surface acid-proof coating can be obtained to all dissolvings.
A kind of 2. diesel exhaust filtration device according to claim 1, it is characterised in that：The stomata（3.1）Hole count
For 600 holes/square inch.
A kind of 3. diesel exhaust filtration device according to claim 1 or 2, it is characterised in that：The next door（3.3）Thickness
Spend for 0.13 ~ 0.14mm.
A kind of 4. diesel exhaust filtration device according to claim 1, it is characterised in that：The heat-insulating and shock-absorbing layer（7）By
Woven wire and ceramic fiber cloth composition, woven wire are arranged in ceramic fiber cloth, woven wire and Rose Box（1）Inwall connects
Touch, ceramic fiber cloth and oxidation catalyst（2）And ceramic honeycomb carrier（3）Contact.
A kind of 5. diesel exhaust filtration device according to claim 4, it is characterised in that：The woven wire is stainless steel
Silk screen or fine copper net, string diameter 0.12mm ~ 0.25mm, aperture 0.2mm ~ 0.42mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610470447.4A CN107542516A (en) | 2016-06-27 | 2016-06-27 | Diesel exhaust filtration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610470447.4A CN107542516A (en) | 2016-06-27 | 2016-06-27 | Diesel exhaust filtration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107542516A true CN107542516A (en) | 2018-01-05 |
Family
ID=60960046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610470447.4A Pending CN107542516A (en) | 2016-06-27 | 2016-06-27 | Diesel exhaust filtration device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107542516A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115487824A (en) * | 2022-08-18 | 2022-12-20 | 无锡双翼汽车环保科技有限公司 | Tail gas purification device of mining explosion-proof diesel engine |
-
2016
- 2016-06-27 CN CN201610470447.4A patent/CN107542516A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115487824A (en) * | 2022-08-18 | 2022-12-20 | 无锡双翼汽车环保科技有限公司 | Tail gas purification device of mining explosion-proof diesel engine |
| CN115487824B (en) * | 2022-08-18 | 2023-10-13 | 无锡双翼汽车环保科技有限公司 | Tail gas purifying device of mining explosion-proof diesel engine |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180105 |