CN202125334U - Tail gas purification device - Google Patents
Tail gas purification device Download PDFInfo
- Publication number
- CN202125334U CN202125334U CN2011202513174U CN201120251317U CN202125334U CN 202125334 U CN202125334 U CN 202125334U CN 2011202513174 U CN2011202513174 U CN 2011202513174U CN 201120251317 U CN201120251317 U CN 201120251317U CN 202125334 U CN202125334 U CN 202125334U
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- CN
- China
- Prior art keywords
- wall
- tail gas
- filter
- shell
- exhaust gas
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- 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.)
- Expired - Lifetime
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Abstract
The utility model discloses a tail gas purification device, which comprises a shell and a filter arranged in the shell. The filter is provided with a wall capable of enabling tail gas to pass and collecting particles in the tail gas. The wall is axially arranged along the shell in inclined mode, and a structure with a W-shaped section is formed by the axially-arranged wall in the shell. The wall is formed by enabling metal wire meshes arranged on outer surfaces of two sides to wrap a middle uncemented metal fiber felt in pressing mode. The wall of the filter is provided with catalyst coated on a surface where the tail gas can pass. Two end faces of the wall with the W-shaped section radially form a continuous spiral structure. The wall with the W-shaped section facilitates lowering of back pressure, and a metal fiber sleave structure of the uncemented metal fiber felt is good in dirt accommodating performance. Therefore, particular matter blowing off conditions can not happen under high air speed. Continuous regenerative edge trapping collecting reactions enable large area blocking conditions to be reduced. The shell is packed by a thermal-insulated sealing liner and a cylinder, thereby avoiding gather blocking due to change of environment temperature.
Description
Technical field
The utility model belongs to a kind of exhaust gas cleaner, especially belongs to a kind of purification plant that captures the diesel motor exhaust particle, the exhaust gas cleaner that particularly adopts the non sintered metal fiber felt to constitute.
Background technique
Diesel engine is not because combustion manner and petrol engine are all compression-ignited; The particulate matter that discharges in its tail gas is granular material discharged considerably beyond petrol engine; And DPF diesel-oil vehicle particulate matter catcher is exactly the optimum scheme that solves this difficult problem, and DPF is that Diesel Particulate Filter is called for short.Existing DPF mainly adopts ceramic material such as silicon carbide, steinheilite to become cellular wall to pass through the formula structure; Particulate matter absorption is collected on the cell walls, and filter efficiency is very high, but such structure causes back pressure very big; Regeneration period is short, is easy to cause obstruction for the too high diesel oil of Sulpher content.And the temperature in when regeneration surpasses 650 ℃, and the stupalith thermal conductivity is bad, is heated inequality easily and ftractures reduction of service life.
And the metal DPF that develops at present; The main core arrangement that adopts semipermeable felt-metal and metal beehive; This kind structure has certain reduction effect for back pressure, still to the regeneration of particulate matter, is difficult to the concentrated discharging of control particulate matter owing to penetrating open-celled structure; Be usually said over-emitting black exhaust, and the complex structure cost is high.
Summary of the invention
The utility model discloses a kind of exhaust gas cleaner according to the deficiency of existing technology.The problem that the utility model will solve is lower through a kind of manufacture cost, and purifying effect is better, and structure is more excellent, exhaust gas cleaner easy to process.
The utility model is realized through following technological scheme:
Exhaust gas cleaner; Comprise housing and the filter that is arranged in the housing; Wherein: said filter has can be through said tail gas and with the wall of micro particle catching in the tail gas, and said wall to being obliquely installed, said axially is provided with wall constitutes section one-tenth " W " shape in housing structure along housing shaft.
Further said wall is made up of the non sintered metal fiber felt compacting in the middle of the wire gaze parcel of two side external surfaces.
The non sintered metal fiber felt constitutes 2～3 centimetres of filament lengths by the sleave structure of steel fiber in the middle of the further said wall.
The end of further said wall " W " shape structure connects fixing adjacent diaxon by Connection Card and constitutes to wall is set.
The wall of above-mentioned filter have through spraying be coated in said tail gas through the surface catalyzer.
The wall both ends of the surface of said " W " shape structure radially are continuous helix structure.
DPF is the particulate matter catcher that adopts at present, is made up of housing and the filter that is arranged in the housing usually, and housing has the mechanism that is connected with the tail gas exhaust port, and the tail gas of discharge is along passing through filter in the housing.The said filter of the utility model exhaust gas cleaner has can be through said tail gas and with the wall of micro particle catching in the tail gas, and said wall to being obliquely installed, said axially is provided with wall constitutes section one-tenth " W " shape in housing structure along housing shaft.The wall that the utility model adopts tail gas gas to pass through is obliquely installed in housing vertically; Said being obliquely installed is that wall two ends by arranging vertically are connected to form in twos; Tail gas along housing shaft to entering, behind filter wall, filter back gas along housing shaft to outflow.Said structure has certain reduction effect for back pressure.
The utility model filter wall is made up of the non sintered metal fiber felt compacting in the middle of the wire gaze parcel of two side external surfaces.Said wall is made up of three-decker, and two outer surfaces are wire gazes, and the centre is the non sintered metal fiber felt, can press the ripple typing to process through punch through wire gaze being wrapped fibrofelt.Adopt unsintered metal fiber felt cost of production cheap relatively a lot.The non sintered metal fiber felt is made up of the sleave structure of steel fiber in the middle of the said wall, 2～3 centimetres of filament lengths, and this structure polluted force is strong, the situation of particulate matter stripping under the high-speed can not occur.
The end of the said wall of the utility model " W " shape structure connects fixing adjacent diaxon by Connection Card and constitutes to wall is set, and other connections or fixation method can also be arranged, and its purpose all is to form along housing shaft to the wall that is obliquely installed, and the tail gas all-pass is crossed filter wall and got final product.
The filter wall of the utility model exhaust gas cleaner has the DPF carrier based on VIII family metal alloy, and being used to prepare can cyclic regeneration and the relatively low diesel-oil vehicle particulate matter capture converter of cost.
The helpfulness of the utility model; The wall of the utility model " W " shape structure helps back pressure to be reduced, can cyclic regeneration and cost relatively low, the non sintered metal fiber felt steel fiber sleave structure of DPF inner core; Polluted force is strong, the situation of particulate matter stripping under the high-speed can not occur.Owing to adopt the mode of cyclic regeneration to react, make the situation that the large size obstruction occurs greatly reduce while capturing.And the shell of DPF adopts the thermal-insulating sealing liner to add the cylindrical shell encapsulation, and it is little to make that temperature inside reduces, and can avoid not reaching the situation generation that burning or reaction temperature are assembled obstruction because outer particulate matter appears in the reduction of ambient temperature.
Description of drawings
Fig. 1 is the utility model exhaust gas cleaner sectional structure schematic representation;
Fig. 2 is the utility model exhaust gas cleaner end face radial structure schematic representation;
Fig. 3 is the utility model exhaust gas flow schematic representation.
Among the figure, the 1st, filter wall, the 2nd, filter wall connects the end, and the 3rd, housing, the 4th, the center fixation dish, the 5th, fixing rod, the 6th, another connects the end filter wall, and A is a gas inlet, and B is a gas outlet.
Embodiment
Through embodiment and accompanying drawing the utility model is further specified below.Embodiment is used to explain the utility model, limits the utility model never in any form.
In conjunction with Fig. 1 to Fig. 3.
Exhaust gas cleaner comprises housing 3 and the filter that is arranged in the housing, and filter has can be through said tail gas and with the wall 1 of micro particle catching in the tail gas, and wall 1 to being obliquely installed, axially is provided with wall 1 constitutes section one-tenth " W " shape in housing structure along housing shaft.Wall 1 is made up of the non sintered metal fiber felt compacting in the middle of the wire gaze parcel of two side external surfaces.The non sintered metal fiber felt constitutes 2～3 centimetres of filament lengths by the sleave structure of steel fiber in the middle of the wall 1.The end of wall 1 " W " shape structure connects fixing adjacent diaxon by Connection Card and constitutes to wall is set.The wall 1 of filter have through spraying be coated in said tail gas through the surface catalyzer.Wall 1 both ends of the surface of " W " shape structure radially are continuous helix structure.
This purification plant adopts the following steps preparation:
One) card article is made
A cuts out the dark teeth groove of the wide 8mm of 5mm with the 430 model steel bars of 20mm * 1000mm * 0.6mm through line cutting (or punching press).
B clamps the steel plate bar of a part of line well cutting also the angle of 45 ° of odd and even number teeth directional opposite direction curved written treaties (big I changes according to own easy to operate next fixed) with special fixture.
C clamps the steel plate bar of another part line well cutting also wherein half the tooth curved written treaty 45 (b and c quantity are half-and-half) with special fixture.
Two) press ripple
It is wide that a fibrofelt is cut into 160mm, and length is conveniently processed just but is greater than 1000mm at least.It is wide long together with fibrofelt to be cut into 400mm to wire gaze equally.
B wraps fibrofelt with wire gaze and presses the ripple typing through punch, stores for future use.
Three) contained side
With (one) card (two).The ripple network folder that two volumes is pressed with the card article b of tangent bend makes it become a volume Double-level Reticulated well.And another side clips (when noting single crooked card article folder will unbent limit to the outside) with single crooked card article.
Four) reel
(3) are rolled into tube.The new ripple net of working it out in (three) firmly be rolled into tubular (attention must rolling-in and also the reel process in to fill up a filler strip of keeping at a distance between two-layer); Spool the back and wrap up one deck with wire gaze; Clamp with clip then; Its diameter is vertically filled in the tube less than the diameter that is contained in tube then, unclamped clip.
Five) contained side once more
The filler strip of pad reel is extracted out, and single crooked card article, another side is clamped in unbent tooth bending seals it then.
Six) fixing
Weld (five) ready-made tube to block with criss-cross steel bar up and down it can not become flexible.
Seven) pretreatment and coating
Ready-made POC carrier is placed in the High Temperature Furnaces heat-treats by room temperature → 300 ℃ 1hr → 600 ℃ of 1hr → 800 ℃ 3hr heating curves, a certain proportion of slurry coating that will grind in advance with spray gun is in carrier inside, and 60 ℃ air-dry.
Eight) finished product roasting
Applying catalyzer after air-dry is placed on Muffle furnace or forges on the band stove 550 ℃ of 2h cooling of coming out of the stove.
The utility model coats the metallic alloy fiber felt with silk screen, be pressed into the ripple guipure of certain width, and two ripple guipure one ends are clamped with card article, is rolled into tubular then, and the other end is clamped with card article, and forming the cross section is the carrier of the cross structure of W shape.Air-flow gets into from an end, must come out from the fibrofelt inside of ripple guipure, and entrained particulate matter just has been intercepted on the fibrofelt.
DPF generally is contained in the rear end of oxidative diesel type catalyzer (DOC), forms a cover particulate matter after-treatment system with DOC, and the cyclic regeneration of its particulate matter is mainly through following two kinds of approach.
A kind of is because the strong oxidation of DOC makes the NO in the tail gas be converted into NO
2, following reaction can take place in the particulate matter that runs on the DPF:
NO
2+C＝NO+CO，(1)
CO+O
2＝CO
2 (2)
Thereby the carbon granule that makes obstruction becomes gas to be run out of, and realizes regeneration.
Another kind of approach is through inlet end spraying catalyst coatings, and the burning-point of carbon granule is reduced (can arrive below 250 ℃) greatly, the particulate matter that accumulates on the cellosilk is burnt under the situation of high-power acceleration, thereby realize regeneration.
DPF inner core of the present invention has adopted the specialty metal alloy material, and shell adopts stainless steel, and the thermal conductivity of metal is good, can keep from heat inequality and ruptures.And the good toughness vibration resistance of metal, the situation of mechanical crushing can not appear.Particulate matter in tail gas gets into the DPF inner core, is mainly tackled through following several kinds of modes:
(1) collision and absorption:
When engine exhaust is flowed through wire gaze or resistant to elevated temperatures fiber; The chance of bigger impact of particles fiber is more; And stayed wherein by embedding, though smaller particles can be walked around fiber flow at first, maybe can pass through the micropore of filter core; But as long as a contact material for core surface will be attracted on the fiber.
(2) inertia interception:
In the steel fiber filter core, big particle can not directly be tackled in filter core through the duct between the fiber.When little particle flows in filter core with blast air; Can produce and be used to blast air; When in arranging mixed and disorderly layer of fibers, flowing, the direction of streamline constantly changes, and the particle with big momentum can be owing to inertia has little time to change direction with air-flow; Break away from original track and draw close, contact fiber and by being tackled to fiber.
(3) diffusion interception:
In diesel exhaust gas, little particle is because the collision of heat motion of gas molecules can be done irregular Brownian movement.If the concentration of exhaust particulate is uniformly, so this Brownian movement can not make the macroscopic view transmission of particle change;
But, increase the probability that particle is tackled because of the contact fiber because fibre body has formed concentration gradient, thereby caused that particle spreads to low concentration region from high concentration region the interception of particle.Diffusion effect works in the scope of the 120 ° of sectors in filter fiber cross section greatly.
(4) gravitational settling:
When the diesel engine of slow motion was discharged tail gas stream through grain catcher, because the time that tail gas is detained is long, bigger particle possibly break away from original streamline owing to the effect of gravity and be deposited on the capture unit.
The sleave structure that DPF inner core of the present invention is a steel fiber, 2～3 centimetres of filament lengths, polluted force is strong, the situation of particulate matter stripping under the high-speed can not occur.Because the form that adopts machinery to roll; Process easy, can be according to different engine displacement, the carrier of preparation different-diameter and volume; Convenient coupling; And owing to adopt non-sintered metal fibers felt, fabricating cost significantly reduces than felt-metal commonly used, for have good using value in automobile transformation.
DPF carrier of the present invention is through stand test ESC-13 operating mode loop test, can reach 82.3% to the average transformation efficiency of diesel particulate thing, is superior to the arresting efficiency of felt-metal about 60%.And adopt the catalyst coatings technology can make particulate matter reach cyclic regeneration, so working life can be than the prolongation that does not have coating.
Claims (6)
1. exhaust gas cleaner; Comprise housing and the filter that is arranged in the housing; It is characterized in that: said filter has can be through said tail gas and with the wall of micro particle catching in the tail gas; To being obliquely installed, the said wall that axially is provided with constitutes the structure that section becomes " W " shape to said wall in housing along housing shaft.
2. exhaust gas cleaner according to claim 1 is characterized in that: said wall is made up of the non sintered metal fiber felt compacting in the middle of the wire gaze parcel of two side external surfaces.
3. exhaust gas cleaner according to claim 2 is characterized in that: the non sintered metal fiber felt constitutes 2～3 centimetres of filament lengths by the sleave structure of steel fiber in the middle of the said wall.
4. exhaust gas cleaner according to claim 2 is characterized in that: the end of said wall " W " shape structure connects fixing adjacent diaxon by Connection Card and constitutes to wall is set.
5. according to each described exhaust gas cleaner of claim 1 to 4, it is characterized in that: the wall of said filter have through spraying be coated in said tail gas through the surface catalyzer.
6. exhaust gas cleaner according to claim 5 is characterized in that: the wall both ends of the surface of said " W " shape structure radially are continuous helix structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202513174U CN202125334U (en) | 2011-07-15 | 2011-07-15 | Tail gas purification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202513174U CN202125334U (en) | 2011-07-15 | 2011-07-15 | Tail gas purification device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202125334U true CN202125334U (en) | 2012-01-25 |
Family
ID=45488404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202513174U Expired - Lifetime CN202125334U (en) | 2011-07-15 | 2011-07-15 | Tail gas purification device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202125334U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103028447A (en) * | 2012-12-11 | 2013-04-10 | 江苏云才材料有限公司 | POC (Particle Oxidation Catalyst) metal fiber carrier for purification of diesel vehicle tail gas and preparation method thereof |
| CN107476862A (en) * | 2017-08-22 | 2017-12-15 | 芜湖恒耀汽车零部件有限公司 | A kind of manufacturing process of the catalyst converter of vehicle exhaust EGR |
| CN108358652A (en) * | 2018-01-31 | 2018-08-03 | 天津大学 | A kind of preparation method of the gasoline engine particles trap ceramic filter core with gradient pores structure |
-
2011
- 2011-07-15 CN CN2011202513174U patent/CN202125334U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103028447A (en) * | 2012-12-11 | 2013-04-10 | 江苏云才材料有限公司 | POC (Particle Oxidation Catalyst) metal fiber carrier for purification of diesel vehicle tail gas and preparation method thereof |
| CN107476862A (en) * | 2017-08-22 | 2017-12-15 | 芜湖恒耀汽车零部件有限公司 | A kind of manufacturing process of the catalyst converter of vehicle exhaust EGR |
| CN108358652A (en) * | 2018-01-31 | 2018-08-03 | 天津大学 | A kind of preparation method of the gasoline engine particles trap ceramic filter core with gradient pores structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 611731, No. 88, Nan Jie street, hi tech Zone, Sichuan, Chengdu Patentee after: SINOCAT ENVIRONMENTAL TECHNOLOGY CO., LTD. Address before: 611731, No. 12, West core road, West District, Chengdu hi tech Zone, Sichuan Patentee before: Sichuan Zhongzi Exhaust Purge Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120125 |