CN111810277A - Aftertreatment exhaust device capable of reducing DOC (catalyst treated) blockage - Google Patents
Aftertreatment exhaust device capable of reducing DOC (catalyst treated) blockage Download PDFInfo
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- CN111810277A CN111810277A CN201910284795.6A CN201910284795A CN111810277A CN 111810277 A CN111810277 A CN 111810277A CN 201910284795 A CN201910284795 A CN 201910284795A CN 111810277 A CN111810277 A CN 111810277A
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- Prior art keywords
- doc
- dpf
- mixing
- mixed structure
- anger
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Classifications
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- 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
- F01N3/24—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 characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
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- 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
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- 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
- F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
- F01N3/106—Auxiliary oxidation catalysts
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses a post-treatment exhaust device for reducing DOC blockage, which comprises a DOC air inlet mixing structure, a mixing plate, a DOC processor, a DOC air outlet mixing structure, a DPF processor and a DPF air outlet mixing structure, wherein the mixing plate capable of scattering air flow is arranged between the DOC air inlet mixing structure and the DOC processor, one end of the DOC processor, which is far away from the DOC air inlet mixing structure, is connected with the DOC air outlet mixing structure, the other end of the DOC air outlet mixing structure is connected with the DPF processor, the other end of the DPF processor is connected with the DPF air outlet mixing structure, the mixing plate is a porous plate, the surface of the mixing plate, which is close to the air inlet direction, is an arc concave surface, the air outlet surface of the mixing plate is an arc convex surface, the speed uniformity in front of the end surface of a DOC carrier is improved, the reaction efficiency of the DOC is improved, the DOC carrier is prevented, promoting passive regeneration of the DPF.
Description
Technical Field
The invention belongs to the field of automobile exhaust aftertreatment systems, and particularly relates to an aftertreatment exhaust device for reducing DOC (diesel engine head) blockage.
Background
DOC is the abbreviation for oxidation-type catalytic converter, installed in the engine exhaust line, generally after the engine supercharger, before the DPF device. The DOC converts carbon monoxide (CO) and Hydrocarbons (HC) in the engine exhaust to harmless water (H20) and carbon dioxide (CO2) through oxidation reactions. The DOC devices have not used a mixing device before, resulting in a large difference in the vector direction of the velocity of the engine exhaust before the DOC-carrier cross section, i.e. we generally say that a DPF with low velocity uniformity is a particulate trap for trapping particulate emissions in the exhaust and then regenerating the particulate matter attached to the walls of the carrier pores, either actively or passively. The oxidation reaction of the DOC releases a large amount of heat, causing the DPF to trigger passive regeneration.
For the current vehicles matched with DOC and DPF after-treatment components, a mixing device is not used before a DOC device, so that the availability of DOC carriers is reduced, Hydrocarbon (HC) is not fully oxidized and is attached to the end face of the DOC carriers to cause blockage, and the vehicle fails; the DOC carrier has low peripheral reaction efficiency, so that the carrier is rapidly aged; the HC injected into the exhaust gas is not uniformly mixed before the DOC, and Hydrocarbons (HC) are accumulated on the DOC cross section, so that the DOC is blocked, the T5 temperature before the DPF cannot be raised, and the DPF regeneration cannot be completed.
In the application number: CN201810661815.2, having the filing date of 20180625 names: the utility model provides an in the patent of diesel engine granule trapper based on DOC and DPF, discloses a diesel engine granule trapper based on DOC and DPF, including the assembly of admitting air, DOC assembly, DPF assembly and the assembly of giving vent to anger that connects gradually, the assembly of admitting air links to each other through the gas outlet of pipeline with the engine, introduces the trapper with the tail gas that diesel engine discharged, and the tail gas that has black smoke particle enters into in the DOC assembly by the assembly of admitting air, and the DOC carrier in the DOC assembly gets rid of the harmful gas in the tail gas, and the tail gas after DOC assembly catalytic oxidation enters into in the DPF assembly, and the DPF ceramic carrier in the DPF assembly absorbs carbon smoke particulate matter, and the tail gas after the DPF assembly is handled discharges in the atmosphere through the assembly of giving vent to anger.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the aftertreatment exhaust device which is simple in structure, reliable and efficient and can reduce DOC blockage.
The purpose of the invention can be realized by the following technical scheme:
a post-treatment exhaust device for reducing DOC blockage comprises a DOC air inlet mixed structure 01, a mixed plate 02, a DOC processor 03, a DOC air outlet mixed structure 04, a DPF processor 05 and a DPF air outlet mixed structure 06, tail gas sequentially passes through the DOC processor 03, the DOC air outlet mixed structure 04, the DPF processor 05 and the DPF air outlet mixed structure 06 from the DOC air inlet mixed structure 01, a mixing plate 02 capable of scattering air flow is arranged between the DOC air inlet mixing structure 01 and the DOC processor 03, one end of the DOC processor 03 far away from the DOC air inlet mixing structure 01 is connected with the DOC air outlet mixing structure 04, the other end of the DOC air outlet mixing structure 04 is connected with a DPF processor 05, the other end of the DPF processor 05 is connected with a DPF air outlet mixing structure 06, mixing plate 02 is the perforated plate, mixing plate 02 is close to the face of air inlet direction and is circular-arc concave surface, mixing plate 02 goes out the gas face and is circular-arc convex surface.
Preferably, the mixing plate 02 is of a circular structure, and the joint of the DOC air inlet mixing structure 01 and the DOC processor 03 is of a circular structure.
Preferably, the DOC air outlet mixing structure 04 is a bent structure, and an included angle between the air inlet direction and the air outlet direction of the DOC air outlet mixing structure 04 is 90-180 degrees.
Preferably, the caliber of the air outlet of the DPF air outlet mixing structure 06 is smaller than that of the air inlet.
Preferably, the DOC air inlet mixing structure 01 is connected with a mixing plate 02 in a welding mode, and the mixing plate 02 is connected with a DOC processor 03 in a welding mode.
Preferably, the DOC treater 03 and the DOC mixed structure 04 of giving vent to anger welded connection, DOC mixed structure 04 of giving vent to anger and DPF treater 05 welded connection.
Preferably, the DPF processor 05 is welded to the DPF exhaust mixing structure 06.
The invention has the beneficial effects that:
1. the speed uniformity before the end face of the DOC carrier is improved, and the reaction efficiency of the DOC is improved;
2. the DOC carrier is prevented from being rapidly aged;
3. the exhaust gas of the engine is fully mixed with HC sprayed into the exhaust gas, most of heat is released, the front T5 temperature of the DPF is raised, and the DPF is passively regenerated.
Drawings
FIG. 1 is a schematic diagram of an aftertreatment exhaust device for reducing DOC plugging.
Fig. 2 is a schematic view of the structure of the mixing plate.
The arrows in the figure are the air flow directions.
Detailed Description
The technical scheme of the invention is further described by combining the attached drawings:
a post-treatment exhaust device for reducing DOC blockage comprises a DOC air inlet mixed structure 01, a mixed plate 02, a DOC processor 03, a DOC air outlet mixed structure 04, a DPF processor 05 and a DPF air outlet mixed structure 06, tail gas sequentially passes through the DOC processor 03, the DOC air outlet mixed structure 04, the DPF processor 05 and the DPF air outlet mixed structure 06 from the DOC air inlet mixed structure 01, a mixing plate 02 capable of scattering air flow is arranged between the DOC air inlet mixing structure 01 and the DOC processor 03, one end of the DOC processor 03 far away from the DOC air inlet mixing structure 01 is connected with the DOC air outlet mixing structure 04, the other end of the DOC air outlet mixing structure 04 is connected with a DPF processor 05, the other end of the DPF processor 05 is connected with a DPF air outlet mixing structure 06, mixing plate 02 is the perforated plate, mixing plate 02 is close to the face of air inlet direction and is circular-arc concave surface, mixing plate 02 goes out the gas face and is circular-arc convex surface.
In this embodiment, preferably, the mixing plate 02 is a circular structure, and a joint between the DOC intake mixing structure 01 and the DOC processor 03 is a circular structure.
In this embodiment, preferably, the DOC air outlet mixing structure 04 is a curved structure, and an included angle between an air inlet direction and an air outlet direction of the DOC air outlet mixing structure 04 is 90 to 180 degrees.
In this embodiment, preferably, an aperture of an outlet of the DPF outlet mixing structure 06 is smaller than an aperture of an inlet.
In this embodiment, preferably, the DOC intake mixing structure 01 is connected with the mixing plate 02 in a welding manner, and the mixing plate 02 is connected with the DOC processor 03 in a welding manner.
In this embodiment, it is more preferable that the DOC processor 03 is connected to the DOC outlet mixing structure 04 in a welding manner, and the DOC outlet mixing structure 04 is connected to the DPF processor 05 in a welding manner.
In this embodiment, it is more preferable that the DPF processor 05 is welded to the DPF exhaust gas mixing structure 06.
The device is applied in an after-treatment exhaust system, and the main purpose is to reduce DOC blockage. The aftertreatment exhaust device is installed behind an engine, exhaust fluid contains a large amount of pollutants and particles, the exhaust fluid enters a cavity of a DOC air inlet mixing structure 01 and further passes through meshes of a mixing plate 02, the exhaust fluid is changed in direction and fully reacts with a carrier channel flowing to a DOC processor 03 and precious metal on the wall surface of the DOC processor, carbon monoxide and hydrocarbon in engine exhaust are converted into harmless water and carbon dioxide and flow to a DOC air outlet mixing structure 04, a large amount of heat is released at the same time, the temperature of T5 before the DPF processor 05 is raised, DPF is driven to regenerate, and further exhaust fluid enters a DPF air outlet mixing structure 06.
Finally, it should be noted that:
the method may be carried out and its application may be carried out by those skilled in the art with reference to the disclosure herein, and it is expressly intended that all such alternatives and modifications as would be apparent to those skilled in the art are deemed to be included within the invention. While the method and application of the present invention have been described in terms of preferred embodiments, it will be apparent to those of ordinary skill in the art that variations and modifications in the method and application of the invention as described herein may be made and equivalents employed without departing from the spirit and scope of the invention.
Claims (7)
1. An aftertreatment exhaust element for reducing DOC plugging, comprising:
including DOC mixed structure of admitting air ((01)), mixing board (02), DOC treater (03), DOC mixed structure (04) of giving vent to anger, DPF treater (05), DPF mixed structure (06) of giving vent to anger, tail gas is from DOC mixed structure (01) of admitting air through DOC treater (03), DOC mixed structure (04) of giving vent to anger in proper order, DPF treater (05), DPF mixed structure (06) of giving vent to anger, be equipped with mixing board (02) that can break up the air current between DOC mixed structure (01) and DOC treater (03), DOC treater (03) keep away from one end that DOC mixed structure (01) of admitting air and DOC mixed structure (04) of giving vent to anger are connected, the DOC mixed structure (04) other end of giving vent to anger is connected with DPF treater (05), DPF mixed structure (06) of giving vent to anger is connected to the other end of DPF treater (05), mixing board (02) are the perforated plate, mixing board (02) are, the air outlet surface of the mixing plate (02) is an arc-shaped convex surface.
2. The aftertreatment exhaust element for reducing DOC plugging of claim 1 wherein: the mixed plate (02) is of a circular structure, and the joint of the DOC air inlet mixed structure (01) and the DOC processor (03) is of a circular structure.
3. The aftertreatment exhaust element for reducing DOC plugging of claim 1 wherein: DOC mixed structure (04) of giving vent to anger is crooked column structure, DOC mixed structure (04) of giving vent to anger admit air direction and gas outlet direction contained angle are 90-180 degrees.
4. The aftertreatment exhaust element for reducing DOC plugging of claim 1 wherein: the caliber of an air outlet of the DPF air outlet mixing structure (06) is smaller than that of an air inlet.
5. The aftertreatment exhaust element for reducing DOC plugging of claim 1 wherein: DOC mixed structure (01) and mixing plate (02) welded connection of admitting air, mixing plate (02) and DOC treater (03) welded connection.
6. The aftertreatment exhaust element for reducing DOC plugging of claim 1 wherein: DOC treater (03) and DOC give vent to anger mixed structure (04) welded connection, DOC gives vent to anger mixed structure (04) and DPF treater (05) welded connection.
7. The aftertreatment exhaust element for reducing DOC plugging of claim 1 wherein: the DPF processor (05) is connected with the DPF air outlet mixing structure (06) in a welding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910284795.6A CN111810277A (en) | 2019-04-10 | 2019-04-10 | Aftertreatment exhaust device capable of reducing DOC (catalyst treated) blockage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910284795.6A CN111810277A (en) | 2019-04-10 | 2019-04-10 | Aftertreatment exhaust device capable of reducing DOC (catalyst treated) blockage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111810277A true CN111810277A (en) | 2020-10-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910284795.6A Pending CN111810277A (en) | 2019-04-10 | 2019-04-10 | Aftertreatment exhaust device capable of reducing DOC (catalyst treated) blockage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111810277A (en) |
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2019
- 2019-04-10 CN CN201910284795.6A patent/CN111810277A/en active Pending
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