CN214273775U - Tail gas aftertreatment assembly device for non-road state four diesel engines - Google Patents
Tail gas aftertreatment assembly device for non-road state four diesel engines Download PDFInfo
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- CN214273775U CN214273775U CN202120364347.XU CN202120364347U CN214273775U CN 214273775 U CN214273775 U CN 214273775U CN 202120364347 U CN202120364347 U CN 202120364347U CN 214273775 U CN214273775 U CN 214273775U
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- 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
- Y02T10/40—Engine management systems
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Abstract
The utility model discloses a four diesel engine tail gas aftertreatment assembly devices in non-road state, include: DOC assembly, DPF assembly, SCR assembly, first temperature sensor, second temperature sensor, third temperature sensor and urea injection module. One end of the DOC assembly is used for being communicated with an engine exhaust pipe. One end of the DPF assembly is fixedly communicated with the other end of the DOC assembly. One end of the SCR assembly is fixedly communicated with the other end of the DPF assembly. The first temperature sensor is arranged at one end of the DOC assembly. The second temperature sensor is arranged at the other end of the DOC assembly. The third temperature sensor is disposed on one end of the SCR assembly. The urea injection module is arranged on the SCR assembly. And tail gas in an engine exhaust pipe sequentially passes through the DOC assembly, the DPF assembly and the SCR assembly. The utility model discloses a four diesel engine tail gas aftertreatment assembly devices in non-road state, simple structure is reasonable, has reduced the complexity of demarcation model and has markd the work load, and the tail gas after the processing satisfies four emission standard in state.
Description
Technical Field
The utility model relates to a diesel engine technical field especially relates to a four diesel engine tail gas aftertreatment assembly devices in non-road state.
Background
The DOC-DPF-SCR assembly of the diesel engine, namely the assembly of an oxidation catalyst, a diesel particulate filter and a selective catalytic reduction system, is used for treating the tail gas of the diesel engine.
However, the existing assembly device has more measuring point data, although the accuracy of model calculation is improved, the calibration model is complex, the calibration workload is large, the structural strength of the existing assembly device is low, and the accuracy requirement of an assembly part is high.
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 constitutes prior art already known to a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a four diesel engine tail gas aftertreatment assembly devices in non-road state, its simple structure is reasonable, has reduced the complexity of demarcation model and has markd the work load, and the tail gas after the processing satisfies four emission standard in state.
In order to achieve the above object, the utility model provides a four diesel engine tail gas aftertreatment assembly devices in non-road state, include: the device comprises a DOC assembly (oxidation catalyst), a DPF assembly (diesel particulate filter), an SCR assembly (selective catalytic reduction system), a first temperature sensor, a second temperature sensor, a third temperature sensor and a urea injection module. One end of the DOC assembly is used for being communicated with an engine exhaust pipe. One end of the DPF assembly is fixedly communicated with the other end of the DOC assembly. One end of the SCR assembly is fixedly communicated with the other end of the DPF assembly. The first temperature sensor is arranged at one end of the DOC assembly. The second temperature sensor is arranged at the other end of the DOC assembly. The third temperature sensor is disposed on one end of the SCR assembly. The urea injection module is arranged on the SCR assembly. And tail gas in an engine exhaust pipe sequentially passes through the DOC assembly, the DPF assembly and the SCR assembly.
The utility model discloses an in the embodiment, four diesel engine tail gas aftertreatment assembly devices in non-road state still include the nitrogen oxygen sensor, set up on the other end of SCR assembly.
The utility model discloses an in the embodiment, first temperature sensor and second temperature sensor are used for detecting the temperature at DOC assembly both ends respectively.
In an embodiment of the present invention, the third temperature sensor is used for detecting the temperature of one end of the SCR assembly.
The utility model discloses an among the embodiment, four diesel engine tail gas aftertreatment assembly devices in non-road state still include pressure differential sensor, set up on the DPF assembly, and pressure differential sensor is used for detecting the pressure differential at DPF assembly both ends.
In an embodiment of the present invention, the urea injection module includes a nozzle and a urea mixer.
In an embodiment of the present invention, the DOC assembly, the DPF assembly, and the SCR assembly are in a straight structure.
Compared with the prior art, according to the utility model discloses a four diesel engine tail gas aftertreatment assembly devices in non-road state, simple structure is reasonable, has reduced the complexity of demarcation model and has markd the work load, and the tail gas after the processing satisfies four emission standard in state.
Drawings
Fig. 1 is a schematic structural view of an off-road four-diesel engine exhaust aftertreatment assembly device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a non-road national four-diesel engine exhaust aftertreatment assembly device according to another embodiment of the present invention.
Description of the main reference numerals:
the system comprises a 1-DOC assembly, a 2-DPF assembly, a 3-SCR assembly, a 4-first temperature sensor, a 5-second temperature sensor, a 6-third temperature sensor, a 7-urea injection module, a 71-nozzle, a 72-urea mixer, an 8-nitrogen oxygen sensor, a 9-differential pressure sensor and a 10-engine exhaust pipe.
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 by the following detailed description.
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 structural diagram of a non-road national four-diesel engine exhaust aftertreatment assembly device according to an embodiment of the present invention. As shown in fig. 1, the exhaust gas post-treatment assembly device for the four-diesel engine in non-road state according to the preferred embodiment of the present invention comprises: DOC assembly 1, DPF assembly 2, SCR assembly 3, first temperature sensor 4, second temperature sensor 5, third temperature sensor 6 and urea injection module 7. One end of the DOC assembly 1 is used for being communicated with an engine exhaust pipe. One end of the DPF assembly 2 is fixedly communicated with the other end of the DOC assembly 1. One end of the SCR assembly 3 is fixedly communicated with the other end of the DPF assembly 2. The first temperature sensor 4 is disposed on one end of the DOC assembly 1. The second temperature sensor 5 is disposed on the other end of the DOC assembly 1. A third temperature sensor 6 is disposed on one end of the SCR assembly 3. The urea injection module 7 is disposed on the SCR assembly 3. Tail gas in an engine exhaust pipe sequentially passes through the DOC assembly 1, the DPF assembly 2 and the SCR assembly 3.
The utility model discloses an in the embodiment, four diesel engine tail gas aftertreatment assembly devices in non-road state still include nitrogen oxygen sensor 8, set up on the other end of SCR assembly 3. The first temperature sensor 4 and the second temperature sensor 5 are respectively used for detecting the temperature at two ends of the DOC assembly 1.
In one embodiment of the present invention, the third temperature sensor 6 is used to detect the temperature of one end of the SCR assembly 3. Four diesel engine exhaust aftertreatment assembly devices in non-road state still include differential pressure sensor 9, set up on DPF assembly 2, and differential pressure sensor 9 is used for detecting the pressure differential at DPF assembly 2 both ends.
In one embodiment of the present invention, the urea injection module 7 includes a nozzle 71 and a urea mixer 72. DOC assembly 1, DPF assembly 2 and SCR assembly 3 are the style of calligraphy structure.
Fig. 2 is a schematic structural diagram of a front view of an exhaust gas post-treatment assembly device of a non-road state four diesel engine according to an embodiment of the present invention. As shown in fig. 2, the DOC assembly 1, the DPF assembly 2, and the SCR assembly 3 are U-shaped structures (the U-shaped structures have better versatility compared to the one-line structure in fig. 1), wherein the intake pipe, the DOC assembly 1, the DPF assembly 2, and the nozzle 71 are on one side of the U-shape, the SCR assembly 3 and the exhaust pipe are on the other side of the U-shape, and the urea mixer 72 is used as a structural connection structure on both sides of the U-shape, and is integrally fixed by a bracket and a clamp. The present embodiment also has a plurality of sensors as shown in fig. 1, and the connection positions are the same, so that the description is omitted here.
In practical application, the utility model discloses a four diesel engine tail gas aftertreatment assembly devices in non-road state, after the limit value requirement that has evaluated four emissions in non-road state, particle trap's filtering capability, system calibration complexity, technical scheme is DOC + DPF + SCR (does not contain ASC). As shown in fig. 1, the product structure is a low back pressure linear structure, and the structure of the product is an air inlet pipe, a DOC assembly 1, a DPF assembly 2, a nozzle 71, a urea mixer 72, an SCR assembly 3 and an air outlet pipe according to the air flow sequence. The DOC + DPF module scheme ensures that the filtering efficiency of particles is not lower than 99%, and the particles collected in the DPF assembly 2 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) In the action of SCR catalystsThen, the nitrogen oxide in the tail gas reacts with ammonia gas to finally generate nitrogen (N)2). The sensor arrangement scheme is as follows: temperature sensor x 3+ nitrogen oxygen sensor 8 x 1+ differential pressure sensor 9 x 1, temperature sensor before the DOC (first temperature sensor 4), temperature sensor behind the DOC (second temperature sensor 5), temperature sensor before the SCR (third temperature sensor 6), nitrogen oxygen sensor behind the SCR 8 (nitrogen oxygen sensor 8), DPF differential pressure sensor 9 (differential pressure sensor 9). Meanwhile, in order to improve the universality of the technical scheme, a U-shaped scheme with a compact structure is developed, and as shown in fig. 2, the U-shaped scheme has the same structure in the airflow sequence. Wherein, intake pipe + DOC + DPF + nozzle 71 is on one side of U word, and SCR + outlet duct is on U word another side, and urea mixer 72 is as the connection structure on U word both sides, and is whole fixed with support, clamp.
In a word, the utility model discloses a four diesel engine tail gas aftertreatment assembly devices in non-road state, simple structure is reasonable, has reduced the complexity of demarcation model and has markd the work load, and the tail gas after the processing satisfies four emission standard in state.
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 (7)
1. The utility model provides a four diesel engine tail gas aftertreatment assembly devices in non-road state which characterized in that includes:
one end of the DOC assembly is used for being communicated with an engine exhaust pipe;
one end of the DPF assembly is fixedly communicated with the other end of the DOC assembly;
one end of the SCR assembly is fixedly communicated with the other end of the DPF assembly;
a first temperature sensor disposed on the one end of the DOC assembly;
a second temperature sensor disposed on the other end of the DOC assembly;
a third temperature sensor disposed on the one end of the SCR assembly; and
a urea injection module disposed on the SCR assembly;
and tail gas in the engine exhaust pipe sequentially passes through the DOC assembly, the DPF assembly and the SCR assembly.
2. The off-road four-diesel engine exhaust aftertreatment assembly device of claim 1, further comprising a nitrogen-oxygen sensor disposed on another end of the SCR assembly.
3. The off-road four-diesel engine exhaust aftertreatment assembly device of claim 1, wherein the first temperature sensor and the second temperature sensor are respectively configured to detect temperatures at two ends of the DOC assembly.
4. The off-road four-diesel engine exhaust aftertreatment assembly arrangement according to claim 1, wherein said third temperature sensor is adapted to sense a temperature of said one end of said SCR assembly.
5. The off-road four-diesel engine exhaust aftertreatment assembly device of claim 1, further comprising a differential pressure sensor disposed on the DPF assembly, the differential pressure sensor configured to detect a differential pressure across the DPF assembly.
6. The off-road four-diesel engine exhaust aftertreatment assembly device of claim 1, wherein the urea injection module comprises a nozzle and a urea mixer.
7. The off-road four-diesel engine exhaust aftertreatment assembly device of claim 1, wherein the DOC assembly, the DPF assembly and the SCR assembly are in a straight line structure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120364347.XU CN214273775U (en) | 2021-02-08 | 2021-02-08 | Tail gas aftertreatment assembly device for non-road state four diesel engines |
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| CN202120364347.XU CN214273775U (en) | 2021-02-08 | 2021-02-08 | Tail gas aftertreatment assembly device for non-road state four diesel engines |
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| CN214273775U true CN214273775U (en) | 2021-09-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112780394A (en) * | 2021-02-08 | 2021-05-11 | 广西玉柴机器股份有限公司 | Tail gas aftertreatment assembly device for non-road state four diesel engines |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112780394A (en) * | 2021-02-08 | 2021-05-11 | 广西玉柴机器股份有限公司 | Tail gas aftertreatment assembly device for non-road state four diesel engines |
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