CN209704675U - A kind of double down system of diesel engine vent gas - Google Patents
A kind of double down system of diesel engine vent gas Download PDFInfo
- Publication number
- CN209704675U CN209704675U CN201822074946.9U CN201822074946U CN209704675U CN 209704675 U CN209704675 U CN 209704675U CN 201822074946 U CN201822074946 U CN 201822074946U CN 209704675 U CN209704675 U CN 209704675U
- Authority
- CN
- China
- Prior art keywords
- component
- diesel engine
- urea
- double down
- vent gas
- 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.)
- Active
Links
Classifications
-
- 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
-
- 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
Landscapes
- Exhaust Gas After Treatment (AREA)
Abstract
The utility model relates to a kind of double down systems of diesel engine vent gas, equipped with urea pump assembly and exhaust gas processing device, successively subsection setup DOC component, POC component and SCR component, the tail gas of diesel engine are discharged exhaust gas processing device after DOC component, POC component and SCR component；A urea nozzle is installed in one end of SCR component, and urea liquid injects SCR component by urea nozzle；One online monitoring system is electrically connected with urea pump assembly.Using segmentation structure, can be installed according to different vehicle emission behaviour according to actual needs.While whole system only needs to install additional two nitrogen oxide sensors, an exhaust temperature sensor, an admission pressure/temperature sensor and obtains desired signal formation closed-loop control, system arranges warm, NO by acquisition revolving speed, air inflow, tail gasXContent information, and rear accurately injection urea liquid by verifying repeatedly.Cost can be both reduced in this way, and the stability of system also can be improved.
Description
Technical field
The utility model relates to vehicle maintenance service field, CO, HC in tail gas in specially a kind of pair of diesel engine,
NOX, the double down system of diesel engine vent gas that is handled of the pollutants such as PM.
Background technique
With being continuously increased for vehicle guaranteeding organic quantity, atmosphere pollution is also increasingly severe.In China's atmosphere pollution, due to
The carbon monoxide (CO) of motor vehicle emission and hydrocarbon (HC) accounting are more than 80%, nitrogen oxides (NOX) and particulate matter (PM) be then more than
90%." Chinese automotive environment manages annual report within 2017 " points out, according to fuel grade, the NO of national emission of diesel engineXIt is close
70%, PM of vehicle mass exhaust total quantity is then more than 90%；Classify by discharge standard, occupies standard steam before the state I of car ownership 1%
Four kinds of major pollutants of vehicle, discharge account for the 33.8% of vehicle mass exhaust total quantity；The wherein mobile tribute to air quality of non-rice habitats
Offering can not be ignored, the mobile source emission SO of non-rice habitats284.4 ten thousand tons, 70.4 ten thousand tons of HC, NOX563.9 ten thousand tons, 47.2 ten thousand tons of PM.
Therefore accelerate yellow mark vehicle (diesel vehicle of the emission level lower than the gasoline car of state I discharge standard and state's III discharge standard) and old
Eliminating for vehicle (longer using the time, level of pollution is poor) is imperative.But it imposes uniformity without examining individual cases all yellow mark vehicles and old vehicle
It eliminates, equally will also result in the wasting of resources and other pollutions.It is so preferable to a portion high added value and vehicle condition
Vehicle enables to reach emission request, can be good at solving the problems, such as this by installing exhaust gas cleaner additional.
But such vehicle for being able to carry out repacking, that is, it needs to reduce PM, it is also desirable to reduce NOX, and different vehicle is discharged
Different, gas exhaust piping design is different, and use environment is not first-class, causes installation exhaust gas cleaner to be hardly formed lot-size raw
It produces, needs to customize, cause cost very high；And to NOXProcessing, need to be demarcated according to different vehicle, cost is very high.
In addition, in-use automotive is transformed in industry at present, it is sometimes necessary to carry out mechanical part again according to different automobile types
Exploitation, component universality are low；NOXDischarge needs artificial calibration, and discharge is not up to standard and to PM poor filtration effect or filtering
Device is easy stifled；It is with high costs.
Utility model content
The purpose of this utility model is to provide a kind of versatile, PM, NO can effectively reduceXThe double down system of discharge amount
System, to solve the problems mentioned in the above background technology.
In order to solve the above-mentioned technical problem, the utility model provides the following technical solutions: a kind of double down system of diesel engine vent gas
System is equipped with urea pump assembly and exhaust gas processing device handling the tail gas in diesel engine of vehicle, urea pump assembly and automobile
Urea box connection, it is characterised in that: the exhaust gas processing device successively subsection setup DOC component, POC component and SCR component, bavin
The tail gas of oil machine is discharged after DOC component, POC component and SCR component；One end of SCR component is installed by one urea nozzle, urea
Solution injects SCR component by urea nozzle again through the urea pump；One online monitoring system is electrically connected with urea pump assembly；
One differential pressure pickup is separately connected DOC component and POC component by a pair of of pressure difference measurement pipe.
Further, the SCR component close to one end of POC component be equipped with a front end face, front end face be equipped with a connecting pipe with
The SCR component connection, the communicating pipe is equipped with a upstream nitrogen oxide sensor.
Further, the urea nozzle is installed on the front end face.
Further, the front end face is equipped with an exhaust temperature sensor, and the exhaust temperature sensor is electrically connected with urea pump assembly.
Further, the SCR component is equipped with a downstream nitrogen oxide sensor on the outer wall by proximal end.
Further, a temperature sensor is installed on the urea box and is electrically connected with the urea pump assembly.
Further, one admission pressure/temperature sensor be installed on it is cold in diesel engine after air inlet pipe and with the urea pump
Assembly electrical connection.
Further, the pulse signal being installed on the included generator of diesel engine, the pulse signal and urea pump are read
Assembly electrical connection.
Further, metallic fiber sintered felt is equipped in the POC component.
Further, the metallic fiber sintered felt includes the multiple plate felts and waveform felt of alternately superposition, waveform felt one end
"the" shape is combined into plate felt one end of adjacent upper and lower level respectively to fit together.
Compared with prior art, the utility model beneficial effect achieved is:
1. using segmentation structure, different dimension D OC can be installed according to actual needs according to different vehicle emission behaviour
Component, POC component and SCR component.
It is passed 2. whole system only needs to install additional two nitrogen oxide sensors, an exhaust temperature sensor, an admission pressure/temperature
Sensor obtains desired signal and forms closed-loop control, and online monitoring system passes through acquisition revolving speed, air inflow, tail gas row temperature, NOXContain
Information is measured, and rear accurately injection urea liquid by verifying repeatedly.The cost that whole system can both be reduced in this way, due to zero
The stability of system also can be improved in the reduction of part.
3., can be by urea solution temperature data transmission to online monitoring system in urea box mounting temperature sensor.Online
When monitoring system detects that urea solution temperature is less than calibration preset value, urea box and urea pump assembly can be heated in time
Processing, guarantee system can operate normally.
Detailed description of the invention
Attached drawing is used to provide a further understanding of the present invention, and constitutes part of specification, practical with this
Novel embodiment is used to explain the utility model together, does not constitute limitations of the present invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the double down system of the utility model diesel engine vent gas；
Fig. 2 is the structural schematic diagram of the utility model exhaust gas processing device；
Fig. 3 is the structural schematic diagram for the metallic fiber sintered felt being arranged in the utility model DOC component；
Wherein, air inlet pipe 1, DOC component 2, POC component 3, upstream nitrogen oxide sensor 4, communicating pipe 5, urea nozzle 6, SCR
Component 7, exhaust pipe 8, downstream nitrogen oxide sensor 9, pressure difference measurement pipe 10, differential pressure pickup 11, urea box 13, temperature sensor
14, engine cool water solenoid valve 15, generator 16, admission pressure/temperature sensor 17, controller 18, urea inlet tube 19,
Urea outlet tube 20, exhaust temperature sensor 21, waveform felt 22, plate felt 23.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Fig. 1 and Fig. 2 are please referred to, the utility model provides a kind of double down system of diesel engine vent gas, is equipped with urea pump assembly, tail
Flash Gas Compression Skid System and online monitoring system 18, using SCR technology, (Selective Catalytic Reduction is selectively urged
Change reduction) processing diesel engine of vehicle in tail gas.
Referring to Fig. 1, the urea pump assembly is equipped with urea inlet tube 19 and urea outlet tube 20.The urea inlet tube
It is connect with the urea box 13 of automobile.The urea outlet tube is connected to exhaust gas processing device, and urea liquid is injected at tail gas
It manages in device to NOXEqual gases carry out catalysis reduction.
Referring to Fig. 2, the exhaust gas processing device, successively subsection setup air inlet pipe 1, DOC component 2, POC component 3, SCR
Component 7 and exhaust pipe 8.Wherein, tail gas is entered inside the exhaust gas processing device by air inlet pipe；DOC component and POC component are equal
For the column structure equipped with metal outer wall, the DOC component is by utilizing diesel oxidation catalyst (English name Diesel
Oxidation catalysts), in tail gas 50%~90% CO (carbon monoxide) and HC (hydrocarbon) and part PM are removed,
And eliminate acetaldehyde smell and black smoke that diesel fueled combustion generates.Its chemical reaction is as follows:
Aoxidize CO and HC:HC+O2--→CO3+H3O、CO+O2--→CO3；
Partial oxidation SOF:SOF+O2--→CO3+H3O；
Regeneration forms NO2: NO+O2--→NO2
The formation of sulfate important component: SO2+O2--→SO3。
It holds, POC component is closely connect with DOC component, and POC component is used to carry out the particulate matter in tail gas to aoxidize and urge
Change.Referring to Fig. 3, being equipped with metallic fiber sintered felt in the POC component as filterability medium, the metallic fiber sintered felt
Multiple plate felts 23 and waveform felt 22 including alternately superposition, waveform felt one end are tied with plate felt one end of adjacent upper and lower level respectively
Synthesis "the" shape fits together.When tail gas enters POC component, most of air-flow flows through metallic fiber sintered felt, particle
Object is trapped in the surface of plate felt and waveform felt, aoxidizes the NO of generation at a certain temperature2Reaction, realize PM it is passive again
It is raw, additional regeneration strategy and equipment are not needed, meanwhile, fraction directly passes through the aperture discharge of plate felt, to be formed
Part flow filtration.
Further, which is equipped with differential pressure pickup 11, and the differential pressure pickup is separately connected by pressure difference measurement pipe 10
DOC component and POC component, to monitor the internal pressure of DOC component and POC component and information is fed back to the on-line monitoring
System.If there is stopping state in DOC component and the exhaust pipe of POC component internal, by collect differential pressure pickup signal and
When feedback to online monitoring system, driver quickly can have found and solve the problems, such as, prevent from causing to send out since exhaust pipe back pressure is excessive
Motivation oil consumption becomes larger or filter is burnt.
Referring to Fig. 2, SCR component is cylindrical metal structure, it is equipped with front face, rear surface and side wall surface.Before SCR component
Wall is equipped with a connecting pipe 5 and the POC component is connected.Meanwhile front face installs a urea nozzle 6 and exhaust temperature sensor 21, urine
The amount of injection of plain nozzle is controlled by online monitoring system 18.The urea liquid come out from urea pump injects SCR by urea nozzle
Component, selectively by NO and NO at 290-400 DEG C2It is reduced into N2.Exhaust pipe is set to the rear surface, and tail gas passes through SCR
It is excluded after component from exhaust pipe, exhaust temperature sensor is to acquire exhaust temperature data.
Further, it is provided with upstream nitrogen oxide sensor 4 communicating pipe, outside wall surface is passed by the position of proximal end equipped with downstream nitrogen oxygen
Sensor 9, to acquire the nitrogen oxygen content of SCR component different location.According to the air inflow of engine, upstream nitrogen oxide sensor is adopted
The nitrogen oxygen content (ppm) collected can calculate the amount of nitrogen oxides (mg/s) in tail gas, later according to downstream nitrogen oxide sensor
The nitrogen oxygen content (ppm) of coming is returned, and then reaches urea injecting quantity Closed-cycle correction, to reduce the workload of calibration.
Further, it reads and is installed on pulse signal on the included generator 16 of diesel engine, by the pulse for acquiring generator
Signal is simultaneously transmitted to urea pump assembly.It is converted by the pulse signal of generator by rotating ratio, can accurately obtain engine
Rotary speed information.
Further, it can be frozen due to urea liquid at -11 DEG C or less, influence the normal operation of SCR component.Therefore the system into
One step is in being arranged temperature sensor 14 on the urea box, when online monitoring system detects that urea solution temperature is less than calibration in advance
If when value, system will open engine cool water solenoid valve 15, and engine cooling water is passed through in urea box, by the urine in urea box
Plain solution is heated；The heater button in urea pump assembly is opened simultaneously, is heated to urea pump；Pipeline is also opened to add
Thermal switch heats urea pipe, and the urea liquid heating of icing is thawed to flowable state, guarantees that system can be normal
Operation.
Further, one admission pressure/temperature sensor 17 be installed on it is cold in diesel engine after air inlet pipe and with it is described online
Monitoring system is electrically connected, to the intake air temperature and pressure after cold in test engine, by the air inlet that can be calculated engine
Amount.
Fig. 1 and Fig. 2 are please referred to, the working principle of the double down system of the diesel engine vent gas is as follows:
1, the tail gas that automobile diesel oil tank generates enters DOC component from air inlet pipe and is aoxidized, using diesel oxidation catalyst,
It can remove in tail gas 50%~90% CO and HC and part PM；
2, tail gas, which passes through, communicating pipe enters the POC component, and most of air-flow flows through metallic fiber sintered felt, particulate matter quilt
It is captured in the surface of plate felt and waveform felt, aoxidizes the NO of generation at a certain temperature2Reaction, realizes the passive regeneration of PM；
3, tail gas goes successively to SCR component, reacts with the urea liquid injected in SCR component, has choosing at 290-400 DEG C
Select by NO and NO2It is reduced into N2, it is discharged finally by exhaust pipe；
4, online monitoring system is fed back by the collected nitrogen oxygen content of upstream nitrogen oxide sensor, downstream nitrogen oxide sensor
Nitrogen oxygen content and admission pressure/temperature sensor acquisition data etc. reach the amount of injection Closed-cycle correction by calculating again,
To reduce the workload of calibration.
Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention, it is not limited to this
Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art
For, it is still possible to modify the technical solutions described in the foregoing embodiments, or to part of technical characteristic
It is equivalently replaced.Within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on,
It should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of double down system of diesel engine vent gas is equipped with urea pump assembly and tail gas to handle the tail gas in diesel engine of vehicle
Processing unit, urea pump assembly are connected to the urea box of automobile, it is characterised in that: the exhaust gas processing device successively subsection setup
The tail gas of DOC component, POC component and SCR component, diesel engine is discharged after DOC component, POC component and SCR component；SCR group
A urea nozzle is installed in one end of part, and urea liquid injects SCR component by urea nozzle again through the urea pump；One online prison
Control system is electrically connected with urea pump assembly and urea nozzle；One differential pressure pickup is separately connected DOC by a pair of of pressure difference measurement pipe
Component and POC component.
2. the double down system of a kind of diesel engine vent gas according to claim 1, it is characterised in that: the SCR component is close to POC
One end of component is equipped with a front end face, and front end face is equipped with a connecting pipe and is connected to the SCR component, and the communicating pipe is equipped with one
Upstream nitrogen oxide sensor.
3. the double down system of a kind of diesel engine vent gas according to claim 2, it is characterised in that: the urea nozzle is installed on
The front end face.
4. the double down system of a kind of diesel engine vent gas according to claim 3, it is characterised in that: the front end face is equipped with a row
Temperature sensor, the exhaust temperature sensor are electrically connected with urea pump assembly.
5. the double down system of a kind of diesel engine vent gas according to claim 4, it is characterised in that: the SCR component is close
One downstream nitrogen oxide sensor is installed on the outer wall of end.
6. the double down system of a kind of diesel engine vent gas according to claim 5, it is characterised in that: a temperature sensor is installed on
The urea box is simultaneously electrically connected with the urea pump assembly.
7. the double down system of a kind of diesel engine vent gas according to claim 6, it is characterised in that: one admission pressure/temperature passes
Sensor be installed on it is cold in diesel engine after air inlet pipe and be electrically connected with the urea pump assembly.
8. the double down system of a kind of diesel engine vent gas according to claim 7, it is characterised in that: reading is installed on diesel engine certainly
Pulse signal on the generator of band, the pulse signal are electrically connected with the urea pump assembly.
9. the double down system of a kind of diesel engine vent gas according to claim 1, it is characterised in that: be equipped in the POC component
Metallic fiber sintered felt.
10. the double down system of a kind of diesel engine vent gas according to claim 9, it is characterised in that: described metallic fiber sintered
Felt includes the multiple plate felts and waveform felt of alternately superposition, and waveform felt one end is respectively in conjunction with plate felt one end of adjacent upper and lower level
It fits together at "the" shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822074946.9U CN209704675U (en) | 2018-12-11 | 2018-12-11 | A kind of double down system of diesel engine vent gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822074946.9U CN209704675U (en) | 2018-12-11 | 2018-12-11 | A kind of double down system of diesel engine vent gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209704675U true CN209704675U (en) | 2019-11-29 |
Family
ID=68637398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822074946.9U Active CN209704675U (en) | 2018-12-11 | 2018-12-11 | A kind of double down system of diesel engine vent gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209704675U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112196642A (en) * | 2020-10-10 | 2021-01-08 | 南京依柯卡特排放技术股份有限公司 | Vehicle-mounted gas-assisted aftertreatment monitoring control system for diesel engine truck |
-
2018
- 2018-12-11 CN CN201822074946.9U patent/CN209704675U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112196642A (en) * | 2020-10-10 | 2021-01-08 | 南京依柯卡特排放技术股份有限公司 | Vehicle-mounted gas-assisted aftertreatment monitoring control system for diesel engine truck |
| CN112196642B (en) * | 2020-10-10 | 2021-07-27 | 南京依柯卡特排放技术股份有限公司 | Vehicle-mounted gas-assisted aftertreatment monitoring control system for diesel engine truck |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP7208007B2 (en) | High frequency process sensing, control and diagnostic networks and systems | |
| JP6931001B2 (en) | Radio frequency systems and methods for monitoring engine exhaust components | |
| US8341936B2 (en) | Advanced exhaust-gas sampler for exhaust sensor | |
| EP2778361B1 (en) | Apparatus, method, and system for diagnosing reductant delivery performance | |
| CN110206623A (en) | A kind of motor exhaust post-processing control system and control method | |
| US8820051B2 (en) | Vehicle oxidation catalyst efficiency model for adaptive control and diagnostics | |
| US7685814B2 (en) | Systems, apparatuses, and methods of determining plugging or deplugging of a diesel oxidation catalyst device | |
| CN105822398B (en) | Diagnostic device for internal combustion engine and on-board diagnostic system | |
| EP2843225B1 (en) | Intake manifold having a mixing duct and an EGR flow measurement system integrally formed into the intake manifold | |
| US20110232362A1 (en) | Detection of exhaust filter effectiveness | |
| US20110061368A1 (en) | Particulate matter sensor and exhaust gas purifying apparatus | |
| US9194272B2 (en) | Power system | |
| CN105556082A (en) | Diagnostic device | |
| CN102733911A (en) | Exhaust treatment system for internal combustion engine | |
| US9145818B2 (en) | Exhaust gas sampling device | |
| CN103883380A (en) | Method and system for controlling exhaust gas temperature of engine | |
| US20140166126A1 (en) | Reductant delivery system | |
| CN209704675U (en) | A kind of double down system of diesel engine vent gas | |
| CN203925695U (en) | The control system of engine exhaust temperature | |
| EP3106641B1 (en) | Catalytic device detection system | |
| US9556779B2 (en) | Leak detection and mitigation in reductant delivery systems | |
| CN106523084A (en) | Gas/liquid mixing device for exhaust aftertreatment | |
| US20140360159A1 (en) | Precipitation cover for an exhaust system | |
| KR101278925B1 (en) | Combustion Type Regeneration System Using Combustion Gas Circulation for Diesel Particulate Filter | |
| JP2017044120A (en) | Exhaust emission control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |