CN112177742A - Tail gas aftertreatment encapsulation - Google Patents

Tail gas aftertreatment encapsulation Download PDF

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Publication number
CN112177742A
CN112177742A CN202011279707.2A CN202011279707A CN112177742A CN 112177742 A CN112177742 A CN 112177742A CN 202011279707 A CN202011279707 A CN 202011279707A CN 112177742 A CN112177742 A CN 112177742A
Authority
CN
China
Prior art keywords
assembly
aftertreatment
housing
flange portion
port
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
CN202011279707.2A
Other languages
Chinese (zh)
Inventor
吕春虎
李伟
陈龙
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 CN202011279707.2A priority Critical patent/CN112177742A/en
Publication of CN112177742A publication Critical patent/CN112177742A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • F01N13/0097—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are arranged in a single housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • 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

Landscapes

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

Abstract

An exhaust aftertreatment package comprising a housing assembly, a first aftertreatment carrier assembly removably mounted within the housing assembly, a second aftertreatment carrier assembly mounted within the housing assembly downstream of the first aftertreatment carrier assembly in an exhaust flow direction, and a cavity assembly mated with the housing assembly, the cavity assembly being located between the first and second aftertreatment carrier assemblies in the exhaust flow direction; the cavity assembly includes a first port, a second port, an inner cavity communicating the first port with the second port, a first flange portion surrounding the first port, and a second flange portion surrounding the second port, the first flange portion and the second flange portion being detachably mounted to the housing assembly by a mounting member.

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
Existing exhaust aftertreatment packages typically include a diesel oxidation catalyst, a diesel particulate trap, and a selective catalytic reductant, among others. To improve performance, existing exhaust aftertreatment packages typically further include a mixing chamber assembly located between the diesel particulate trap and the selective catalytic reduction agent, which typically includes a mixing tube to uniformly mix the exhaust and urea droplets.
As is well known, a diesel particulate filter is used to capture particulate matters in exhaust, and when the particulate matters accumulate to a certain degree, the backpressure of the system is easily too large, so how to clean the particulate matters is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide an easily detachable tail gas aftertreatment package.
In order to achieve the purpose, the invention adopts the following technical scheme: an exhaust aftertreatment package comprising a housing assembly, a first aftertreatment carrier assembly removably mounted within the housing assembly, a second aftertreatment carrier assembly mounted within the housing assembly downstream of the first aftertreatment carrier assembly in an exhaust flow direction, and a cavity assembly mated with the housing assembly, the cavity assembly being located between the first and second aftertreatment carrier assemblies in the exhaust flow direction; the cavity assembly includes a first port, a second port, an inner cavity communicating the first port with the second port, a first flange portion surrounding the first port, and a second flange portion surrounding the second port, the first flange portion and the second flange portion being detachably mounted to the housing assembly by a mounting member.
As a further improved technical solution of the present invention, the first aftertreatment carrier assembly includes a first housing and a first aftertreatment carrier enclosed in the first housing; the housing assembly includes a first mounting cartridge partially housing the first housing.
As a further improved aspect of the present invention, the first mounting tube is provided with an annular first projecting portion, one side of the first housing is provided with an annular projecting portion, and the mounting member includes a first clip that fixes the first flange portion, the projecting portion, and the first projecting portion together.
As a further improved technical solution of the present invention, the protruding portion is provided with a first side portion, a second side portion, a first gasket fitted over the first side portion, and a second gasket fitted over the second side portion, the first gasket is located between the first flange portion and the first side portion, and the second gasket is located between the second side portion and the first protruding portion.
As a further improved technical scheme of the invention, the first mounting cylinder is provided with a plurality of positioning convex hulls which protrude inwards in the radial direction, and the outer surface of one side of the first shell, which is far away from the protruding part, is matched with the positioning convex hulls.
As a further improved technical solution of the present invention, the exhaust gas aftertreatment package includes a perforated plate installed in the first installation cylinder and an annular steel wool fixed on the perforated plate, and one end of the first shell, which is far away from the protruding portion, is inserted into the annular steel wool for positioning.
As a further improved aspect of the present invention, the housing assembly includes a second mounting tube provided with an annular second projecting portion, and the mounting member includes a second clip that fixes the second flange portion and the second projecting portion together.
As a further improved technical scheme of the invention, the cavity assembly is further provided with a cyclone tube at least partially extending into the second mounting cylinder, and the cavity assembly is further provided with a mounting seat for mounting a urea nozzle, wherein the urea nozzle is used for spraying atomized urea liquid drops into the cyclone tube.
As a further improved technical solution of the present invention, the second flange portion surrounds the outer periphery of the swirl tube, and the exhaust gas aftertreatment package is further provided with a third gasket located between the second flange portion and the second protruding portion.
As a further improved technical scheme of the invention, the first after-treatment carrier component is a diesel particulate trap component, and the second after-treatment carrier component is a selective catalytic reduction agent component.
Compared with the prior art, the first flange part and the second flange part are detachably mounted on the shell assembly through the mounting part, so that the shell assembly is convenient to dismount, and the first aftertreatment carrier assembly is convenient to dismount.
Drawings
FIG. 1 is a schematic perspective view of an exhaust aftertreatment package according to the invention in one embodiment.
Fig. 2 is a partially exploded perspective view of fig. 1.
Fig. 3 is a front view of fig. 1.
Fig. 4 is a schematic cross-sectional view taken along line a-a of fig. 3 in one embodiment.
Fig. 5 is a partially enlarged view of the circled portion in fig. 4.
Fig. 6 is a schematic sectional view taken along the line a-a in fig. 3 in another embodiment.
Fig. 7 is a partially enlarged view of the circled portion in fig. 6.
Detailed Description
Referring to fig. 1 to 7, the present invention discloses an exhaust gas aftertreatment package 100, which includes a housing assembly 40, a first aftertreatment carrier assembly 10 detachably mounted in the housing assembly 40, a second aftertreatment carrier assembly 20 mounted in the housing assembly 40 and located downstream of the first aftertreatment carrier assembly 10 in an exhaust gas flow direction, and a cavity assembly 50 engaged with the housing assembly 40. The chamber assembly 50 is located between the first aftertreatment carrier assembly 10 and the second aftertreatment carrier assembly 20 in the exhaust gas flow direction. The chamber body assembly 50 is detachably mounted to the housing assembly 40 by a mounting member.
In the illustrated embodiment of the present invention, the exhaust aftertreatment package 100 is a box-type structure. The housing assembly 40 includes an outer housing 401, an inlet pipe 402, an outlet pipe 403, a baffle 404, a first mounting cylinder 405, and a second mounting cylinder 406. The first mounting cylinder 405 and the second mounting cylinder 406 both partially protrude from the baffle 404. The first mounting cylinder 405 is provided with a first annular projection 4051, and the second mounting cylinder 406 is provided with a second annular projection 4061.
The first aftertreatment carrier assembly 10 includes a first housing 11 and a first aftertreatment carrier 12 enclosed within the first housing 11. The first mounting cylinder 405 is used to partially accommodate the first housing 11. The first aftertreatment carrier assembly 10 is removably mounted to the first mounting cylinder 405. In the illustrated embodiment of the invention, the first aftertreatment carrier assembly 10 is a diesel particulate trap assembly (DPF). The second aftertreatment support assembly 20 is a Selective Catalytic Reduction (SCR) assembly. In the illustrated embodiment of the invention, the exhaust aftertreatment package 100 further includes a diesel oxidation catalyst assembly 70(DOC) mounted upstream of the first aftertreatment carrier assembly 10.
One side of the first housing 11 is provided with an annular protrusion 111. The boss 111 is provided with a first side 1111, a second side 1112, a first gasket 1113 sleeved on the first side 1111, and a second gasket 1114 sleeved on the second side 1112.
Referring to fig. 4 and 5, in an embodiment of the present invention, the first mounting cylinder 405 is provided with a plurality of positioning convex hulls 4052 protruding inward in a radial direction, and the outer surface 112 of the first housing 11 on the side away from the protruding portion 111 is matched with the positioning convex hulls 4052 to improve the coaxiality.
Referring to fig. 6 and 7, in another embodiment of the present invention, the exhaust gas aftertreatment package 100 includes an opening plate 407 installed in the first installation cylinder 405, and an annular steel wool 408 fixed on the opening plate 407, and an end of the first housing 11 away from the protruding part 111 is inserted into the annular steel wool 408 for positioning.
The chamber assembly 50 includes a first port 501, a second port 502, an inner chamber 503 communicating the first port 501 and the second port 502, a first flange portion 504 surrounding the first port 501, and a second flange portion 505 surrounding the second port 502, and the first flange portion 504 and the second flange portion 505 are detachably mounted to the housing assembly 40 by the mounting member. The chamber body assembly 50 is further provided with a swirl tube 506 extending at least partially into the second mounting cylinder 406. The second flange 505 surrounds the outer periphery of the swirl tube 506. The cavity assembly 50 is further provided with a mounting seat 507 for mounting the urea nozzle 200, and the urea nozzle 200 is used for spraying atomized urea liquid drops into the cyclone pipe 506.
Specifically, the mounting member includes a first yoke 61 and a second yoke 62. The first clamp 61 secures the first flange portion 504, the boss portion 111, and the first projection 4051 together. The first gasket 1113 is positioned between the first flange portion 504 and the first side portion 1111 and the second gasket 1114 is positioned between the second side portion 1112 and the first protrusion portion 4051 to provide a seal. The second clip 62 secures the second flange portion 505 and the second projecting portion 4061 together. The exhaust aftertreatment package 100 is further provided with a third gasket 1115 between the second flange 505 and the second protruding portion 4061 to achieve sealing.
When the exhaust gas aftertreatment device is used, exhaust gas of an engine enters the exhaust gas aftertreatment package 100 from the air inlet pipe 402, then sequentially flows through the diesel oxidation catalyst assembly 70 and the first aftertreatment carrier assembly 10, and then enters the cavity assembly 50 from the first port 501; the exhaust gas then flows through the inner cavity 503 and out the second port 502; then, the tail gas flows into the cyclone pipe 506 in a cyclone shape; when the urea injection condition is reached, the urea injector 200 injects atomized urea droplets into the swirl tube 506; at this time, the mixed gas flow of the rotating tail gas and the urea liquid drops flows downstream; the combined gas stream then flows through the second aftertreatment support assembly 20 and finally exits through the outlet duct 403.
When disassembly is required, the chamber body assembly 50 can be removed by disassembling the first and second clips 61, 62; at this time, the first housing 11 portion of the first aftertreatment carrier assembly 10 is exposed at one side of the baffle 404 for easy removal. The removed first aftertreatment carrier assembly 10 may be cleaned or replaced and reinstalled into the first mounting cylinder 405. Of course, since the cyclone tube 506 is connected to the chamber assembly 50, when the chamber assembly 50 is disassembled, the cyclone tube can be cleaned to remove urea crystals that may appear thereon.
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 housing assembly, a first aftertreatment carrier assembly removably mounted within the housing assembly, a second aftertreatment carrier assembly mounted within the housing assembly downstream of the first aftertreatment carrier assembly in an exhaust flow direction, and a cavity assembly mated with the housing assembly, the cavity assembly being located between the first and second aftertreatment carrier assemblies in the exhaust flow direction; the method is characterized in that: the cavity assembly includes a first port, a second port, an inner cavity communicating the first port with the second port, a first flange portion surrounding the first port, and a second flange portion surrounding the second port, the first flange portion and the second flange portion being detachably mounted to the housing assembly by a mounting member.
2. The exhaust aftertreatment package of claim 1, wherein: the first aftertreatment carrier assembly comprises a first housing and a first aftertreatment carrier encapsulated within the first housing; the housing assembly includes a first mounting cartridge partially housing the first housing.
3. The exhaust aftertreatment package of claim 2, wherein: the first installation barrel is provided with an annular first protruding portion, one side of the first shell is provided with an annular protruding portion, the installation component comprises a first clamp, and the first clamp fixes the first flange portion, the protruding portion and the first protruding portion together.
4. The exhaust aftertreatment package of claim 3, wherein: the bulge is provided with a first side part, a second side part, a first sealing gasket sleeved on the first side part and a second sealing gasket sleeved on the second side part, the first sealing gasket is located between the first flange part and the first side part, and the second sealing gasket is located between the second side part and the first bulge part.
5. The exhaust aftertreatment package of claim 3, wherein: the first mounting cylinder is provided with a plurality of positioning convex hulls which protrude inwards along the radial direction, and the outer surface of one side of the first shell, which is far away from the protruding part, is matched with the positioning convex hulls.
6. The exhaust aftertreatment package of claim 3, wherein: the tail gas aftertreatment encapsulation comprises a perforated plate and annular steel wool, the perforated plate is installed in the first installation cylinder, the annular steel wool is fixed on the perforated plate, and one end, far away from the protruding portion, of the first shell is inserted into the annular steel wool to be located.
7. The exhaust aftertreatment package of claim 2, wherein: the housing assembly includes a second mounting cylinder provided with an annular second projection, the mounting member includes a second clip that secures the second flange portion and the second projection together.
8. The exhaust aftertreatment package of claim 7, wherein: the cavity assembly is also provided with a cyclone tube at least part of which extends into the second mounting cylinder, and the cavity assembly is also provided with a mounting seat for mounting a urea nozzle, and the urea nozzle is used for spraying atomized urea liquid drops into the cyclone tube.
9. The exhaust aftertreatment package of claim 8, wherein: the second flange portion surrounds the periphery of whirl pipe, the tail gas aftertreatment encapsulation still is equipped with and is located the second flange portion with the third is sealed to fill up between the second bulge.
10. The exhaust aftertreatment package of any one of claims 1 to 9, wherein: the first aftertreatment carrier component is a diesel particulate trap component and the second aftertreatment carrier component is a selective catalytic reduction agent component.
CN202011279707.2A 2020-11-16 2020-11-16 Tail gas aftertreatment encapsulation Pending CN112177742A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011279707.2A CN112177742A (en) 2020-11-16 2020-11-16 Tail gas aftertreatment encapsulation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011279707.2A CN112177742A (en) 2020-11-16 2020-11-16 Tail gas aftertreatment encapsulation

Publications (1)

Publication Number Publication Date
CN112177742A true CN112177742A (en) 2021-01-05

Family

ID=73918569

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011279707.2A Pending CN112177742A (en) 2020-11-16 2020-11-16 Tail gas aftertreatment encapsulation

Country Status (1)

Country Link
CN (1) CN112177742A (en)

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