CN113339117A - Tail gas aftertreatment assembly device of harvester - Google Patents

Tail gas aftertreatment assembly device of harvester Download PDF

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Publication number
CN113339117A
CN113339117A CN202110680334.8A CN202110680334A CN113339117A CN 113339117 A CN113339117 A CN 113339117A CN 202110680334 A CN202110680334 A CN 202110680334A CN 113339117 A CN113339117 A CN 113339117A
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CN
China
Prior art keywords
assembly
aftertreatment
cylinder
dpf
doc
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
CN202110680334.8A
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Chinese (zh)
Inventor
姜刚
赵亚飞
刘振
韦林茵
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.)
Guangxi Yuchai Machinery Co Ltd
Original Assignee
Guangxi Yuchai Machinery 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 Guangxi Yuchai Machinery Co Ltd filed Critical Guangxi Yuchai Machinery Co Ltd
Priority to CN202110680334.8A priority Critical patent/CN113339117A/en
Publication of CN113339117A publication Critical patent/CN113339117A/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
    • 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
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • 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
    • F01N13/14—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 thermal insulation
    • F01N13/141—Double-walled exhaust pipes or housings
    • 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
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • 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

Abstract

The invention discloses a tail gas aftertreatment assembly device of a harvester, which comprises: aftertreatment barrel, DOC assembly, DPF assembly, urea mixer, SCR assembly and outlet duct. The post-treatment cylinder is fixedly connected with the engine. The DOC assembly is arranged on one side in the aftertreatment cylinder, and one end of the DOC assembly is communicated with an engine exhaust pipe through an air inlet pipe. The DPF assembly is arranged on one side in the aftertreatment barrel, and one end of the DPF assembly is fixedly communicated with the other end of the DOC assembly. The urea mixer is arranged at the center in the post-treatment cylinder, and one end of the urea mixer is fixedly communicated with the other end of the DPF assembly. The SCR assembly is arranged on the other side in the aftertreatment cylinder, and one end of the SCR assembly is fixedly communicated with the other end of the urea mixer. One end of the air outlet pipe is arranged at the other side in the post-treatment cylinder body, and one end of the air outlet pipe is fixedly communicated with the other end of the SCR assembly. Therefore, the tail gas aftertreatment assembly device of the harvester is compact and reasonable in structure, and the treated tail gas meets the discharge standard of the fourth nation.

Description

Tail gas aftertreatment assembly device of harvester
Technical Field
The invention relates to the technical field of non-road China fourth-stage emission diesel engines, in particular to a tail gas aftertreatment assembly device.
Background
Diesel engine DOC-DPF-SCR assembly, namely assembly of oxidation catalyst, diesel particulate filter and selective catalytic reduction system, for treating tail gas of diesel engine
However, the existing split type DOC + DPF + SCR tail gas control technology is as follows: in order to meet more layout space requirements, the DOC-DPF module and the SCR module are connected through a pipeline with a flange, and the matching part of the pipeline and the flange has no fireproof protection measure, so that when the DOC-DPF module is applied to a harvester, dry wheat straws fall on the pipeline with high temperature, open fire is easily caused, and fire on the harvester is easily caused. Meanwhile, the spatial arrangement of different vehicle types is different, so that the pipeline at the section is poor in universality, and the fireproof cost of the pipeline is indirectly improved.
And the existing DOC + SCR tail gas control technology: because no DPF is arranged in the scheme, particles in the exhaust gas cannot be filtered, and the exhaust emission does not meet the non-road national emission standard IV.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a tail gas aftertreatment assembly device of a harvester, which is compact and reasonable in structure, and the treated tail gas meets the discharge standard of the fourth nation.
In order to achieve the above object, the present invention provides an exhaust gas post-treatment assembly device of a harvester, comprising: aftertreatment barrel, DOC assembly, DPF assembly, urea mixer, SCR assembly and outlet duct. The post-treatment cylinder is fixedly connected with the engine. The DOC assembly is arranged on one side in the aftertreatment cylinder, and one end of the DOC assembly is communicated with an engine exhaust pipe through an air inlet pipe. The DPF assembly is arranged on one side in the aftertreatment barrel, and one end of the DPF assembly is fixedly communicated with the other end of the DOC assembly. The urea mixer is arranged at the center in the post-treatment cylinder, and one end of the urea mixer is fixedly communicated with the other end of the DPF assembly. The SCR assembly is arranged on the other side in the aftertreatment cylinder, and one end of the SCR assembly is fixedly communicated with the other end of the urea mixer. One end of the air outlet pipe is arranged at the other side in the post-treatment cylinder body, and one end of the air outlet pipe is fixedly communicated with the other end of the SCR assembly. The tail gas in the engine exhaust pipe sequentially passes through the air inlet pipe, the DOC assembly, the DPF assembly, the urea mixer, the SCR assembly and the air outlet pipe.
In one embodiment of the invention, the post-treatment cartridge is U-shaped.
In one embodiment of the invention, the aftertreatment cylinder has a double-layer insulation structure.
In one embodiment of the invention, a first runway-type protective cover is arranged on the top of the post-treatment cylinder, and a second runway-type protective cover is arranged on the periphery of the post-treatment cylinder.
In one embodiment of the invention, a nozzle is provided between the DPF assembly and the urea mixer.
In an embodiment of the present invention, the exhaust gas post-treatment assembly device further includes a fixing plate disposed below the post-treatment cylinder.
In one embodiment of the invention, the second racetrack shaped shield is provided with a bowl shaped concave groove, and the nozzle is arranged in the bowl shaped concave groove.
In an embodiment of the present invention, the exhaust gas after-treatment assembly device of the harvester further includes a housing, and the after-treatment cylinder is disposed in the housing.
Compared with the prior art, the tail gas aftertreatment assembly device of the harvester has a compact and reasonable structure and a fireproof and heat-insulating structure, and the treated tail gas meets the national emission standard.
Drawings
FIG. 1 is a schematic front view of an exhaust aftertreatment assembly arrangement of a harvester according to an embodiment of the invention;
FIG. 2 is a schematic side view of an exhaust aftertreatment assembly arrangement of a harvester according to an embodiment of the invention;
FIG. 3 is a schematic cross-sectional view of an exhaust aftertreatment assembly arrangement of a harvester according to an embodiment of the invention;
FIG. 4 is a schematic bottom view of an exhaust aftertreatment assembly arrangement of a harvester according to an embodiment of the invention;
fig. 5 is a partially enlarged schematic view of an exhaust gas post-treatment assembly device of a harvester according to an embodiment of the invention.
Description of the main reference numerals:
1-shell, 2-aftertreatment cylinder, 3-DOC assembly, 4-DPF assembly, 5-urea mixer, 6-SCR assembly, 7-air inlet pipe, 8-air outlet pipe, 9-first runway type protective cover, 10-second runway type protective cover, 11-fixing plate and 12-bowl-shaped concave groove.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
Fig. 1 is a schematic front view of an exhaust gas post-treatment assembly device of a harvester according to an embodiment of the present invention. Fig. 2 is a schematic side view of an exhaust gas aftertreatment assembly arrangement of a harvester according to an embodiment of the invention. Fig. 3 is a schematic cross-sectional view of an exhaust gas aftertreatment assembly arrangement of a harvester according to an embodiment of the invention. Fig. 4 is a schematic bottom view of an exhaust gas aftertreatment assembly arrangement of a harvester according to an embodiment of the invention. Fig. 5 is a partially enlarged schematic view of an exhaust gas post-treatment assembly device of a harvester according to an embodiment of the invention.
As shown in fig. 1 to 5, an exhaust gas post-treatment assembly device for a harvester according to a preferred embodiment of the present invention includes: the device comprises a post-treatment cylinder 2, a DOC assembly 3, a DPF assembly 4, a urea mixer 5, an SCR assembly 6 and an air outlet pipe 8. The post-treatment cylinder 2 is fixedly connected with an engine. DOC assembly 3 sets up one side in aftertreatment barrel 2, and the one end of DOC assembly 3 passes through intake pipe 7 and engine exhaust pipe intercommunication. The DPF assembly 4 is arranged at one side in the aftertreatment cylinder 2, and one end of the DPF assembly 4 is fixedly communicated with the other end of the DOC assembly 3. The urea mixer 5 is disposed at the center inside the aftertreatment cylinder 2, and one end of the urea mixer 5 is fixedly communicated with the other end of the DPF assembly 4. The SCR assembly 6 is arranged at the other side in the post-treatment cylinder 2, and one end of the SCR assembly 6 is fixedly communicated with the other end of the urea mixer 5. One end of the air outlet pipe 8 is arranged at the other side in the post-treatment cylinder 2, and one end of the air outlet pipe 8 is fixedly communicated with the other end of the SCR assembly 6. The tail gas in the engine exhaust pipe sequentially passes through the air inlet pipe 7, the DOC assembly 3, the DPF assembly 4, the urea mixer 5, the SCR assembly 6 and the air outlet pipe 8.
In one embodiment of the present invention, the post-treatment cartridge 2 is U-shaped. The post-treatment cylinder 2 has a double-layer heat insulation structure. The top of the post-treatment cylinder 2 is provided with a first runway-shaped protective cover 9, and the periphery of the post-treatment cylinder 2 is provided with a second runway-shaped protective cover 10. Between the DPF assembly 4 and the urea mixer 5 there is a nozzle.
In an embodiment of the present invention, the exhaust gas aftertreatment assembly device further includes a fixing plate 11 disposed below the aftertreatment cylinder 2. The second racetrack shield 10 has a bowl-shaped recess 12 therein, and the nozzles are disposed in the bowl-shaped recess 12. The tail gas aftertreatment assembly device of the harvester further comprises a shell 1, and an aftertreatment cylinder 2 is arranged in the shell 1.
In practical application, after comprehensively evaluating the limit value requirement of the four-emission non-road state, the filtering capacity of the particle catcher and the structural integration scheme, the technical scheme of the tail gas aftertreatment assembly device of the harvester is DOC + DPF + SCR (without ASC). The U type structure of compact structure can improve the commonality, and wherein, intake pipe 7+ DOC + DPF + nozzle is on one side of U word (being the one side of aftertreatment barrel 2 promptly), and SCR + outlet duct 8 is on U word another side (being the opposite side of aftertreatment barrel 2 promptly), and urea mixer 5 is as the connection structure on U word both sides, wholly with support, clamp fixed. According to the air flow sequence, the structure is as followsGas pipe 7, DOC, DPF, nozzle, urea mixer 5, SCR and outlet duct 8. The DOC + DPF module scheme ensures that the filtering efficiency of particles is not lower than 99%, and the particles collected in the DPF react in a continuous passive regeneration mode; the urea sprayed into the mixer is further mixed and decomposed into ammonia (NH) in the high-temperature tail gas3) Under the action of SCR catalyst, nitrogen oxide in tail gas reacts with ammonia gas to finally generate nitrogen (N)2)。
The U-shaped post-treatment cylinder body 2 is provided with a double-layer heat insulation structure, and the surface temperature can be controlled below 200 ℃; runway-type protective covers with heat dissipation structures are arranged on the periphery and the top of the post-treatment barrel 2. While at the bottom a fixing plate 11 for mounting is provided. The outer surface of the post-processing cylinder body 2 can be controlled below 100 ℃, and the fire risk caused by the operation of the harvester is avoided. Components which are frequently maintained, such as various sensors, nozzles and the like, are arranged in the bowl-shaped concave groove on the protective cover, so that the components are convenient to disassemble and assemble.
In a word, the tail gas aftertreatment assembly device of the harvester is compact and reasonable in structure, has a fireproof and heat-insulating structure, meets the national emission standard of four, is convenient to maintain, disassemble and assemble, and avoids the fire risk caused by the harvester during working.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims (8)

1. An exhaust aftertreatment assembly device of a harvester, comprising:
the post-processing cylinder is fixedly connected with the engine;
the DOC assembly is arranged on one side in the aftertreatment cylinder, and one end of the DOC assembly is communicated with an engine exhaust pipe through an air inlet pipe;
the DPF assembly is arranged on one side in the aftertreatment cylinder, and one end of the DPF assembly is fixedly communicated with the other end of the DOC assembly;
the urea mixer is arranged at the center in the aftertreatment cylinder, and one end of the urea mixer is fixedly communicated with the other end of the DPF assembly;
the SCR assembly is arranged on the other side in the aftertreatment cylinder, and one end of the SCR assembly is fixedly communicated with the other end of the urea mixer; and
one end of the air outlet pipe is arranged on the other side in the aftertreatment cylinder body, and the one end of the air outlet pipe is fixedly communicated with the other end of the SCR assembly;
the tail gas in the engine exhaust pipe sequentially passes through the air inlet pipe, the DOC assembly, the DPF assembly, the urea mixer, the SCR assembly and the air outlet pipe.
2. An exhaust aftertreatment assembly apparatus for a harvester according to claim 1 wherein the aftertreatment cylinder is U-shaped.
3. An exhaust aftertreatment assembly arrangement for a harvester according to claim 1 wherein the aftertreatment cylinder has a double layer insulation construction.
4. An exhaust aftertreatment assembly apparatus for a harvester according to claim 1 wherein the aftertreatment cylinder is provided with a first racetrack shaped shroud at the top and a second racetrack shaped shroud around the periphery of the aftertreatment cylinder.
5. An exhaust aftertreatment assembly arrangement for a harvester according to claim 4 wherein a nozzle is provided between the DPF assembly and the urea mixer.
6. An exhaust aftertreatment assembly apparatus for a harvester according to claim 1 further comprising a mounting plate disposed below the aftertreatment cylinder.
7. An exhaust aftertreatment assembly arrangement according to claim 5 wherein said second race track type guard has a bowl shaped recess therein and said nozzle is disposed in said bowl shaped recess.
8. An exhaust aftertreatment assembly apparatus for a harvester according to claim 1 further comprising a housing, the aftertreatment cartridge being disposed within the housing.
CN202110680334.8A 2021-06-18 2021-06-18 Tail gas aftertreatment assembly device of harvester Pending CN113339117A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110680334.8A CN113339117A (en) 2021-06-18 2021-06-18 Tail gas aftertreatment assembly device of harvester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110680334.8A CN113339117A (en) 2021-06-18 2021-06-18 Tail gas aftertreatment assembly device of harvester

Publications (1)

Publication Number Publication Date
CN113339117A true CN113339117A (en) 2021-09-03

Family

ID=77477451

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110680334.8A Pending CN113339117A (en) 2021-06-18 2021-06-18 Tail gas aftertreatment assembly device of harvester

Country Status (1)

Country Link
CN (1) CN113339117A (en)

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