CN111365107A - Tail gas aftertreatment encapsulation - Google Patents

Tail gas aftertreatment encapsulation Download PDF

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Publication number
CN111365107A
CN111365107A CN202010326919.5A CN202010326919A CN111365107A CN 111365107 A CN111365107 A CN 111365107A CN 202010326919 A CN202010326919 A CN 202010326919A CN 111365107 A CN111365107 A CN 111365107A
Authority
CN
China
Prior art keywords
aftertreatment
housing
strap
carrier
cavity
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.)
Pending
Application number
CN202010326919.5A
Other languages
Chinese (zh)
Inventor
王长林
赵孟东
叶威
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tenneco Suzhou Emission System Co Ltd
Original Assignee
Tenneco Suzhou Emission System Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tenneco Suzhou Emission System Co Ltd filed Critical Tenneco Suzhou Emission System Co Ltd
Priority to CN202010326919.5A priority Critical patent/CN111365107A/en
Publication of CN111365107A publication Critical patent/CN111365107A/en
Priority to CN202021702389.1U priority patent/CN212296581U/en
Priority to CN202010817844.0A priority patent/CN111779559A/en
Priority to PCT/CN2020/118241 priority patent/WO2021212742A1/en
Pending legal-status Critical Current

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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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K13/00—Arrangement in connection with combustion air intake or gas exhaust of propulsion units
    • B60K13/04—Arrangement in connection with combustion air intake or gas exhaust of propulsion units concerning 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
    • 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
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • 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
    • F01N3/18—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 methods of operation; Control
    • F01N3/20—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 methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • 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
    • 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1486—Means to prevent the substance from freezing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Transportation (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

An exhaust aftertreatment package comprising a first aftertreatment carrier, a second aftertreatment carrier, a third aftertreatment carrier, and a mixing assembly; the mixing assembly comprises a fourth shell, a mixing pipe arranged in the fourth shell, a perforated pipe arranged in the mixing pipe and a reflecting plate arranged at the lower end of the mixing pipe and at an interval with the mixing pipe, the fourth shell is provided with a first cavity, a second cavity and a partition plate, and the mixing pipe comprises a plurality of spinning disks exposed in the first cavity and a plurality of through holes exposed in the second cavity. The mixing assembly also includes a baffle in the second cavity and located to a side of the baffle plate, wherein the baffle plate is closer to the third aftertreatment carrier than the baffle plate. So set up, be favorable to distributing the air current evenly in the entry terminal surface of third aftertreatment carrier.

Description

Tail gas aftertreatment encapsulation
Technical Field
The invention relates to a tail gas aftertreatment package, and belongs to the technical field of engine tail gas aftertreatment.
Background
Studies have shown that the degree of uniformity of ammonia distribution in the lines of an exhaust aftertreatment system (e.g., a selective catalytic reduction system, SCR system) has a significant impact on the overall performance and durability of the system. Uneven distribution of ammonia can result in local areas with excessive ammonia and thus ammonia slip, while other ammonia lean areas can result in inefficient nitrogen-oxygen (NOx) conversion. The uneven distribution of ammonia over time can result in uneven catalyst aging, thereby affecting the overall performance of the catalyst. In addition, the uneven distribution of urea liquid drops can cause that the temperature of a local pipe wall or a mixed structure is too low, crystals are formed, and a tail gas pipe is blocked when the temperature is serious, so that the power performance of an engine is reduced.
Disclosure of Invention
The invention aims to provide a tail gas aftertreatment package with uniform airflow distribution.
In order to achieve the purpose, the invention adopts the following technical scheme: an exhaust aftertreatment package comprising a first housing, a first aftertreatment carrier encapsulated in the first housing, a second aftertreatment carrier encapsulated in the second housing and located downstream of the first aftertreatment carrier, a third housing, a third aftertreatment carrier encapsulated in the third housing and located downstream of the second aftertreatment carrier, and a mixing assembly connecting the second housing and the third housing; the mixing assembly comprises a fourth shell, a mixing pipe positioned in the fourth shell, a perforated pipe positioned in the mixing pipe and a reflecting plate positioned at the lower end of the mixing pipe and arranged at intervals with the mixing pipe, the fourth shell is provided with a first cavity communicated with the second aftertreatment carrier, a second cavity communicated with the third aftertreatment carrier and a partition plate for separating the first cavity from the second cavity, and the mixing pipe comprises a plurality of cyclone sheets exposed in the first cavity and a plurality of through holes exposed in the second cavity; the mixing assembly also includes a baffle in the second cavity and located to a side of the baffle plate, wherein the baffle plate is closer to the third aftertreatment carrier than the baffle plate.
As a further improved technical scheme of the invention, the reflecting plate is omega-shaped; the reflecting plate is obliquely arranged in the second cavity to guide the airflow to the baffle plate; the reflecting plate is inclined toward the third aftertreatment carrier.
As a further improved technical solution of the present invention, a first opening through which a part of the air flow passes is formed between the bottom surface of the baffle plate and the reflection plate; the space above the top surface of the baffle forms a second opening through which another portion of the airflow passes.
As a further improved technical scheme of the invention, the reflecting plate is provided with a ridge beam part positioned in the middle, and the top surface of the baffle plate is higher than the ridge beam part.
As a further improved technical scheme of the invention, the number of the first openings is two, the first openings are positioned on two sides of the ridge beam part, and a plurality of back pressure adjusting holes are respectively arranged at two ends of the reflecting plate.
As a further improved technical solution of the present invention, the first aftertreatment carrier is a diesel oxidation catalyst, the second aftertreatment carrier is a diesel particulate trap, and the third aftertreatment carrier is a selective catalytic reduction agent, wherein the first casing and the second casing are axially aligned, and the third casing is parallel to the first casing and the second casing; the tail gas aftertreatment package includes with the air inlet casing that first aftertreatment carrier is linked together and install the intake pipe on the air inlet casing, the intake pipe to the direction of hybrid module extends.
As a further improved technical solution of the present invention, the exhaust gas aftertreatment package further includes a bracket assembly fixed to the intake housing, the bracket assembly including a mounting portion, the mounting portion being provided with a plurality of mounting holes for mounting the exhaust gas aftertreatment package to a vehicle body.
As a further improved technical solution of the present invention, the mounting portion is provided with a first sleeve portion and a second sleeve portion, and the bracket assembly further includes a first support rod inserted in the first sleeve portion and a second support rod inserted in the second sleeve portion.
As a further improved technical solution of the present invention, the bracket assembly further includes two first mounting seats disposed at an interval and fixed on the first supporting rod, and two second mounting seats disposed at an interval and fixed on the second supporting rod.
As a further improved technical solution of the present invention, the bracket assembly further includes a first strap assembly fixed to one of the first mounting seats and one of the second mounting seats, and a second strap assembly fixed to the other of the first mounting seats and the other of the second mounting seats, the first strap assembly includes a first strap and a second strap, the first strap is fixed to the first housing, and the second strap is fixed to the third housing; the second strap assembly includes a third strap and a fourth strap, wherein the third strap is secured to the second housing and the fourth strap is secured to the third housing.
Compared with the prior art, the baffle plate can play a positive role in uniformly distributing airflow, so that the airflow is favorably and uniformly distributed on the inlet end face of the third aftertreatment carrier.
Drawings
FIG. 1 is a schematic perspective view of an exhaust aftertreatment package according to the invention.
Fig. 2 is a perspective view of fig. 1 from another angle.
Fig. 3 is a front view of fig. 1.
Fig. 4 is a bottom view of fig. 1.
Fig. 5 is a top view of fig. 1.
Fig. 6 is a right side view of fig. 1.
Fig. 7 is a left side view of fig. 1.
Fig. 8 is a partially exploded perspective view of fig. 2.
Fig. 9 is a partially exploded perspective view of the mixing assembly of fig. 8.
Fig. 10 is a perspective view of a portion of the mixing assembly of fig. 9.
Fig. 11 is a schematic perspective view from another angle of fig. 10 with the baffles separated.
Fig. 12 is a further exploded perspective view of fig. 11.
Fig. 13 is a perspective view of a bracket assembly.
Fig. 14 is an exploded perspective view of fig. 13.
Detailed Description
Referring to fig. 1 to 14, the present invention discloses an exhaust aftertreatment package 100, which includes a first housing 1, a first aftertreatment carrier 11 packaged in the first housing 1, a second housing 2, a second aftertreatment carrier 21 packaged in the second housing 2 and located downstream of the first aftertreatment carrier 11, a third housing 3, a third aftertreatment carrier 31 packaged in the third housing 3 and located downstream of the second aftertreatment carrier 21, a mixing component 4 connecting the second housing 2 and the third housing 3, an air inlet housing 5 communicated with the first aftertreatment carrier 11, an air inlet pipe 6 installed on the air inlet housing 5, an air outlet housing 7 communicated with the third aftertreatment carrier 31, and a bracket assembly 8 fixed on the air inlet housing 5.
In the illustrated embodiment of the invention, the exhaust aftertreatment package 100 is generally U-shaped. The first aftertreatment carrier 11 is a Diesel Oxidation Catalyst (DOC), the second aftertreatment carrier 21 is a diesel particulate trap (DPF), and the third aftertreatment carrier 31 is a Selective Catalytic Reduction (SCR) wherein the first housing 1 is arranged in axial alignment with the second housing 2, the third housing 3 is parallel to the first housing 1 and the second housing 2; the intake pipe 6 extends in the direction of the mixing assembly 4, so that the intake pipe 6 does not protrude from the exhaust gas aftertreatment package 100 in the width direction, thereby reducing the width of the exhaust gas aftertreatment package 100.
The mixing assembly 4 includes a fourth housing 41, a mixing tube 42 located in the fourth housing 41, a perforated tube 43 located in the mixing tube 42, a perforated plate 44 located at the bottom of the mixing tube 42, a baffle plate 45 located at the lower end of the mixing tube 42 and spaced apart from the mixing tube 42, and a baffle plate 46 located in the second chamber 412 and located at the side of the baffle plate 45. In the illustrated embodiment of the present invention, the fourth housing 41 is a double-layered housing. The fourth casing 41 is provided with a first chamber 411 communicating with the second aftertreatment carrier 21, a second chamber 412 communicating with the third aftertreatment carrier 31, and a partition 413 partitioning the first chamber 411 and the second chamber 412. The mixing pipe 42 includes a plurality of spinning disks 421 exposed in the first chamber 411 and a plurality of perforated holes 422 exposed in the second chamber 412. The top of the fourth housing 41 is provided with a nozzle mounting seat 414 for mounting a urea nozzle (not shown). The urea nozzle is used to spray atomized urea droplets into the mixing tube 42. The perforated pipes 43 and perforated plates 44 facilitate further crushing of the urea into smaller particles, thereby reducing the risk of urea crystallization and improving ammonia homogeneity.
Specifically, in the illustrated embodiment of the present invention, the reflective plate 45 is ω -shaped; the reflection plate 45 is obliquely disposed in the second cavity 412 to guide the air flow toward the baffle 46. The reflection plate 45 is inclined toward the third aftertreatment carrier 31. The baffle 46 is closer to the third aftertreatment carrier 31 than the reflection plate 45. A first opening 461 through which a part of the airflow passes is formed between the bottom surface of the baffle 46 and the reflection plate 45; the space above the top surface of the baffle 46 forms a second opening 462 through which another portion of the airflow passes. The reflection plate 45 is provided with a ridge portion 451 at the center, and the top surface of the baffle plate 46 is higher than the ridge portion 451. In the illustrated embodiment of the present invention, two first openings 461 are located at two sides of the ridge portion 451, and two ends of the reflection plate 45 are respectively provided with a plurality of back pressure adjusting holes 452.
The bracket assembly 8 includes a mounting portion 81, a first support bar 82 and a second support bar 83 fixed to the mounting portion 81, and a first strap assembly 84 and a second strap assembly 85. Specifically, the mounting portion 81 is provided with a plurality of mounting holes 811 for mounting the exhaust aftertreatment package 100 to a vehicle body. The mounting hole 811 may be a screw hole. The mounting portion 81 is further provided with a first sleeve portion 812 and a second sleeve portion 813. The first support rod 82 is inserted and fixed in the first sleeve portion 812, and the second support rod 83 is inserted and fixed in the second sleeve portion 813. The bracket assembly 8 further includes two first mounting seats 821 spaced apart from each other and fixed to the first support rod 82, and two second mounting seats 831 spaced apart from each other and fixed to the second support rod 83. The first strap assembly 84 is fixed to one of the first mounting seats 821 and one of the second mounting seats 831, and the second strap assembly 85 is fixed to the other of the first mounting seats 821 and the second mounting seat 831. The first strap assembly 84 includes a first strap 841 and a second strap 842, wherein the first strap 841 is fixed to the first casing 1 and the second strap 842 is fixed to the third casing 3; the second strap assembly 85 includes a third strap 851 and a fourth strap 852, wherein the third strap 851 is fixed to the second case 2, and the fourth strap 852 is fixed to the third case 3. With such an arrangement, the mounting of the exhaust aftertreatment package 100 to the vehicle body is facilitated by the mounting assembly 8; on the other hand, the first casing 1, the second casing 2 and the third casing 3 can be connected into a whole by providing the first strap assembly 84 and the second strap assembly 85, thereby improving the reliability of the product.
When in use, tail gas of the diesel engine enters the air inlet shell 5 from the air inlet pipe 6; then, the tail gas sequentially passes through the first post-treatment carrier 11 and the second post-treatment carrier 21 and enters the first cavity 411 of the mixing component 4; then, the tail gas self-swirling sheet 421 rotates into the mixing pipe 42; the tail gas and urea droplets are mixed in the mixing pipe 42 and form a downward swirling gas flow; then, the airflow is divided into two groups of airflows with opposite rotation directions (one part of the airflows rotate clockwise, the other part of the airflows rotate anticlockwise) under the action of the reflecting plate 45, so that the mixing distance is increased, and the evaporation, pyrolysis and hydrolysis of the urea liquid are improved; then, under the action of the baffle 46, a part of the gas flow passes through the first opening 461, and another part of the gas flow passes through the second opening 462, so that the gas flow can be relatively uniformly distributed on the inlet end face of the third aftertreatment carrier 31, which is beneficial to improving the conversion efficiency of nitrogen oxides. Finally, the gas stream coming out of the third aftertreatment support 31 exits from the outlet housing 7.
The above embodiments are only for illustrating the invention and not for limiting the technical solutions described in the invention, and the understanding of the present specification should be based on the technical personnel in the field, and although the present specification has described the invention in detail with reference to the above embodiments, the technical personnel in the field should understand that the technical personnel in the field can still make modifications or equivalent substitutions to the present invention, and all the technical solutions and modifications thereof without departing from the spirit and scope of the present invention should be covered in the claims of the present invention.

Claims (10)

1. An exhaust aftertreatment package comprising a first housing, a first aftertreatment carrier encapsulated in the first housing, a second aftertreatment carrier encapsulated in the second housing and located downstream of the first aftertreatment carrier, a third housing, a third aftertreatment carrier encapsulated in the third housing and located downstream of the second aftertreatment carrier, and a mixing assembly connecting the second housing and the third housing; the mixing assembly comprises a fourth shell, a mixing pipe positioned in the fourth shell, a perforated pipe positioned in the mixing pipe and a reflecting plate positioned at the lower end of the mixing pipe and arranged at intervals with the mixing pipe, the fourth shell is provided with a first cavity communicated with the second aftertreatment carrier, a second cavity communicated with the third aftertreatment carrier and a partition plate for separating the first cavity from the second cavity, and the mixing pipe comprises a plurality of cyclone sheets exposed in the first cavity and a plurality of through holes exposed in the second cavity; the method is characterized in that: the mixing assembly also includes a baffle in the second cavity and located to a side of the baffle plate, wherein the baffle plate is closer to the third aftertreatment carrier than the baffle plate.
2. The exhaust aftertreatment package of claim 1, wherein: the reflecting plate is omega-shaped; the reflecting plate is obliquely arranged in the second cavity to guide the airflow to the baffle plate; the reflecting plate is inclined toward the third aftertreatment carrier.
3. The exhaust aftertreatment package of claim 2, wherein: a first opening for allowing a part of air flow to pass through is formed between the bottom surface of the baffle plate and the reflecting plate; the space above the top surface of the baffle forms a second opening through which another portion of the airflow passes.
4. The exhaust aftertreatment package of claim 3, wherein: the reflecting plate is provided with a ridge beam portion located in the middle, and the top surface of the baffle is higher than the ridge beam portion.
5. The exhaust aftertreatment package of claim 4, wherein: the first openings are two and located on two sides of the ridge beam portion, and a plurality of backpressure adjusting holes are formed in two ends of the reflecting plate respectively.
6. The exhaust aftertreatment package of claim 1, wherein: the first aftertreatment carrier is a diesel oxidation catalyst, the second aftertreatment carrier is a diesel particulate trap, and the third aftertreatment carrier is a selective catalytic reductant, wherein the first and second housings are axially aligned, and the third housing is parallel to the first and second housings; the tail gas aftertreatment package includes with the air inlet casing that first aftertreatment carrier is linked together and install the intake pipe on the air inlet casing, the intake pipe to the direction of hybrid module extends.
7. The exhaust aftertreatment package of claim 6, wherein: the tail gas aftertreatment encapsulation is still including fixing bracket component on the casing admits air, the bracket component includes the installation department, the installation department be equipped with be used for with a plurality of mounting holes on the automobile body are installed to the tail gas aftertreatment encapsulation.
8. The exhaust aftertreatment package of claim 7, wherein: the mounting portion is provided with a first sleeve portion and a second sleeve portion, and the bracket assembly further comprises a first supporting rod inserted into the first sleeve portion and a second supporting rod inserted into the second sleeve portion.
9. The exhaust aftertreatment package of claim 8, wherein: the bracket component also comprises two first mounting seats which are arranged at intervals and fixed on the first supporting rod and two second mounting seats which are arranged at intervals and fixed on the second supporting rod.
10. The exhaust aftertreatment package of claim 9, wherein: the bracket assembly further comprises a first strap assembly fixed to one of the first mounting seats and one of the second mounting seats, and a second strap assembly fixed to the other of the first mounting seats and the other of the second mounting seats, the first strap assembly comprising a first strap and a second strap, wherein the first strap is fixed to the first housing and the second strap is fixed to the third housing; the second strap assembly includes a third strap and a fourth strap, wherein the third strap is secured to the second housing and the fourth strap is secured to the third housing.
CN202010326919.5A 2020-04-23 2020-04-23 Tail gas aftertreatment encapsulation Pending CN111365107A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN202010326919.5A CN111365107A (en) 2020-04-23 2020-04-23 Tail gas aftertreatment encapsulation
CN202021702389.1U CN212296581U (en) 2020-04-23 2020-08-14 Tail gas aftertreatment encapsulation
CN202010817844.0A CN111779559A (en) 2020-04-23 2020-08-14 Tail gas aftertreatment encapsulation
PCT/CN2020/118241 WO2021212742A1 (en) 2020-04-23 2020-09-28 Exhaust gas post-treatment package

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010326919.5A CN111365107A (en) 2020-04-23 2020-04-23 Tail gas aftertreatment encapsulation

Publications (1)

Publication Number Publication Date
CN111365107A true CN111365107A (en) 2020-07-03

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Application Number Title Priority Date Filing Date
CN202010326919.5A Pending CN111365107A (en) 2020-04-23 2020-04-23 Tail gas aftertreatment encapsulation
CN202021702389.1U Active CN212296581U (en) 2020-04-23 2020-08-14 Tail gas aftertreatment encapsulation
CN202010817844.0A Pending CN111779559A (en) 2020-04-23 2020-08-14 Tail gas aftertreatment encapsulation

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Application Number Title Priority Date Filing Date
CN202021702389.1U Active CN212296581U (en) 2020-04-23 2020-08-14 Tail gas aftertreatment encapsulation
CN202010817844.0A Pending CN111779559A (en) 2020-04-23 2020-08-14 Tail gas aftertreatment encapsulation

Country Status (2)

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CN (3) CN111365107A (en)
WO (1) WO2021212742A1 (en)

Cited By (1)

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