CN206175032U - Diesel engine SCR catalyst converter sulfur poisoning remove device - Google Patents
Diesel engine SCR catalyst converter sulfur poisoning remove device Download PDFInfo
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- CN206175032U CN206175032U CN201621188112.5U CN201621188112U CN206175032U CN 206175032 U CN206175032 U CN 206175032U CN 201621188112 U CN201621188112 U CN 201621188112U CN 206175032 U CN206175032 U CN 206175032U
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- scr catalyst
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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
- Y02T10/12—Improving ICE efficiencies
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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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- Exhaust Gas After Treatment (AREA)
- Processes For Solid Components From Exhaust (AREA)
Abstract
The utility model provides a diesel engine SCR catalyst converter sulfur poisoning remove device, including DOC, DPF, the SCR catalyst converter, control the by -pass line of governing valve with electricity, the aftertreatment controller, DOC's inlet end loops through the air inlet pipeline, turbo charger and engine exhaust pipe intercommunication, the exhaust end communicates with each other with the SCR catalyst converter through DPF, by -pass line advances, the exhaust end respectively with the blast pipe, the air inlet pipeline communicates with each other, be provided with temperature sensor on the air inlet pipeline no. One, a NOX sensor, the DPF fuel nozzle that regenerates, DPF advances, the exhaust end all is provided with pressure sensor, advancing of SCR catalyst converter, the exhaust end is provided with temperature sensor respectively no. Two, no. Two NOX sensors. It is lower that this design makes engine fuel economy worsen the degree.
Description
Technical field
This utility model belongs to diesel emission post processing field, and in particular to a kind of diesel SCR catalytic device sulfur poisoning
Cancellation element, it is adaptable to reduce Fuel Economy deterioration degree.
Background technology
To tackle increasingly stricter emission regulation demands, large diesel engine generally employs DOC+ after the Europe VI stages
The after-treatment system of DPF+SCR+ASC, wherein SCR (SCR) are that diesel engine meets most having for NOx emission target
One of technology of effect.Impact of the dpf regeneration temperature to SCR, worst cold case NO are considered in the VI after-treatment systems of EuropeXHigh conversion effect
The reasons such as the demand of rate, market generally employ cuprio zeolite type SCR.However, cuprio zeolite type SCR has sulfur poisoning and asks
Topic, test data shows, large diesel engine run under the conditions of sulfur content 50ppm diesel oil 100 hours SCR conversion efficiencies may under
Drop 20%, and 15 hours SCR conversion efficiencies are run under the conditions of sulfur content 350ppm diesel engine and will decline 20%.And the Europe VI stages
OBD is very high to post processing coherence request, and SCR sulfur poisonings can cause DS NOx Est exceeded, causes electromotor to report to the police and limit and turns round, sternly
Ghost image rings the operation of electromotor.
Cuprio SCR mechanism of sulfur poisoning is that the S in engine combustion process intermediate fuel oil aoxidizes to form SO2, and with containing metal
Catalyst converter wash coat or water react to form sulfate or sulphuric acid, finally adsorb on the surface of catalyst, cause SCR
Decrease in efficiency.Cuprio SCR sulfur poisonings phenomenon is not permanent damage, can be carried out by more than 500 DEG C high-temperature gases
Desulfurization regeneration, the conversion efficiency of desulfurization regeneration SCR can return to level before sulfur poisoning.But the temperature is in diesel engine conventional operation
Under the conditions of hardly possible reach.
Chinese patent：Application publication number is CN105370355A, and Shen Qing Publication day is the patent of invention on March 2nd, 2016
A kind of engine aftertreatment system is disclosed, the turbocharger that is sequentially connected including the exhaust piping with electromotor, oxidation are urged
Change converter DOC, particulate matter trap DPF, SCR device, and corresponding temperature sensor, pressure transducer, nitrogen oxygen biography are set
Sensor etc..After SCR device sulfur poisoning in the system, the transformation efficiency of NOx seriously can be reduced, therefore in actual application,
Need to carry out which sulfur poisoning monitoring, and periodically desulfurization.Dpf regeneration fuel injector cartridge is adopted in the VI after-treatment systems of Europe at present generally
Putting carries out intensification and realizes that high temperature desulfurizing regenerates, but frequently active oil spout intensification desulfurization can cause the fuel economy of electromotor to be disliked
Change.
The content of the invention
The purpose of this utility model is that the Fuel Economy deterioration degree for overcoming prior art to exist is higher asks
A kind of topic, there is provided the diesel SCR catalytic device of the relatively low fuel economy of simple structure, Fuel Economy deterioration degree
Sulfur poisoning cancellation element.
To realize object above, the technical solution of the utility model is as follows：
A kind of diesel SCR catalytic device sulfur poisoning cancellation element, including the conversion of electromotor, turbocharger, oxidation catalysiss
Device DOC, particulate matter trap DPF, SCR catalyst, the inlet end of the DOC pass sequentially through air inlet pipeline, turbocharger with
Waste pipe is connected, and the exhaust end of DOC communicated with SCR catalyst by DPF, and be provided with air inlet pipeline No. one it is warm
Degree sensor, a NOXSensor, the inlet and outlet end of DPF are provided with pressure transducer, the inlet and outlet end of SCR catalyst
It is respectively arranged with No. two temperature sensors, No. two NOXSensor；
The system also includes bypass line, dpf regeneration fuel nozzle, the inlet and outlet end of the bypass line respectively with
Exhaustor, air inlet pipeline are communicated, and electric controlled regulating valve is provided with bypass line, and the dpf regeneration fuel nozzle is arranged on air inlet
On pipeline, and temperature sensor, a NOXSensor, pressure transducer, No. two temperature sensors, No. two NOXSensor,
Electric controlled regulating valve, dpf regeneration fuel nozzle are connected with aftertreatment controller signal.
The SCR catalyst is cuprio zeolite type SCR.
Compared with prior art, the beneficial effects of the utility model are：
1st, a kind of diesel SCR catalytic device sulfur poisoning cancellation element of this utility model includes bypass line, dpf regeneration fuel oil
Nozzle, the inlet and outlet end of bypass line are communicated with exhaustor, air inlet pipeline respectively, and electric controlled regulating valve is provided with bypass line,
Dpf regeneration fuel nozzle is arranged on air inlet pipeline, and dpf regeneration fuel nozzle can be when DPF initiative regenerations be needed to air inlet pipe
Appropriate fuel oil is sprayed in road, fuel oil can realize SCR catalyst while DPF initiative regenerations are realized Jing after DOC oxidations heat up
High temperature desulfurizing, bypass line enable portion to be directly bypassed on air inlet pipeline without turbocharger, so as to protect
Card electromotor is promoted to more than 500 DEG C in the delivery temperature under high speed, middle and high load working condition, to realize the height of SCR catalyst
Both desulfurization methods of exhaust gas bypass before DPF oil spouts regeneration and turbine are combined by warm desulfurization, the design, on the one hand, Neng Gouke
That what is leaned on realizes the high temperature desulfurizing of SCR catalyst, and desulfurized effect is preferable, it is ensured that the efficiency of Europe VI after-treatment systems, on the other hand,
The system not only to the change of former after-treatment system less, simple structure, adaptability it is good, and reduce DPF oil spouts as far as possible
The number of times of regeneration, reduces cost, and makes Fuel Economy deterioration degree relatively low.Therefore, this utility model not only takes off
Sulfur works well, and causes Fuel Economy deterioration degree relatively low.
Description of the drawings
Structural representations of the Fig. 1 for this utility model system.
Fig. 2 is using method flow chart of the present utility model.
Fig. 3 is the flow chart of enforcement exhaust gas bypass control in using method of the present utility model.
In figure：Electromotor 1, exhaustor 11, turbocharger 2, oxidation catalytic converter DOC3, air inlet pipeline 31, granule
Thing catcher DPF4, the NO of temperature sensor 61, of SCR catalyst 5,XSensor 62, pressure transducer 63, two are warm
Degree 64, No. two NO of sensorXSensor 65, bypass line 7, electric controlled regulating valve 8, dpf regeneration fuel nozzle 9, processing controller
10。
Specific embodiment
Explanation and specific embodiment are described in further detail to this utility model below in conjunction with the accompanying drawings.
Referring to Fig. 1, a kind of diesel SCR catalytic device sulfur poisoning cancellation element, including electromotor 1, turbocharger 2, oxygen
Change catalytic converter DOC3, particulate matter trap DPF4, SCR catalyst 5, the inlet end of the DOC3 passes sequentially through air inlet pipeline
31st, turbocharger 2 is connected with the exhaustor 11 of electromotor 1, and the exhaust end of DOC3 is communicated with SCR catalyst 5 by DPF4, and
61, NO of a temperature sensor is provided with air inlet pipeline 31XSensor 62, the inlet and outlet end of DPF4 are provided with pressure
Force transducer 63, the inlet and outlet end of SCR catalyst 5 are respectively arranged with 64, No. two NO of No. two temperature sensorsXSensor 65；
The system also includes bypass line 7, dpf regeneration fuel nozzle 9, and the inlet and outlet end of the bypass line 7 is distinguished
Communicate with exhaustor 11, air inlet pipeline 31, on bypass line 7, be provided with electric controlled regulating valve 8, the dpf regeneration fuel nozzle 9 sets
Put on air inlet pipeline 31, and 61, NO of a temperature sensorXSensor 62,63, No. two temperature sensing of pressure transducer
64, No. two NO of deviceXSensor 65, electric controlled regulating valve 8, dpf regeneration fuel nozzle 9 are connected with 10 signal of aftertreatment controller.
The SCR catalyst 5 is cuprio zeolite type SCR.
Principle of the present utility model is described as follows：
This utility model provide it is a kind of by Europe VI post processing catalyst converter groups, bypass line 7, dpf regeneration fuel nozzle 9,
Sensor group, aftertreatment controller 10 composition after-treatment system, wherein, dpf regeneration fuel nozzle 9 for DPF4 need master
Appropriate fuel oil is sprayed into in air inlet pipeline 31 during dynamic regeneration, to meet the temperature requirement of 5 desulfurization of SCR catalyst；Bypass line 7 is used
In partial engine aerofluxuss are directly bypassed in air inlet pipeline 31 without turbocharger, it is ensured that electromotor high speed,
Middle and high load working condition delivery temperature can be promoted to more than 500 DEG C, to meet the high temperature requirement of desulfurization；Aftertreatment controller 10 is used
According to sensor signal and control algolithm control dpf regeneration fuel nozzle 9 and the electric controlled regulating valve 8 on bypass line 7.Its tool
Body running process is as follows：
When diesel engine occurs 5 sulfur poisoning of SCR catalyst, while when DPF4 needs regeneration, aftertreatment controller 10 is according to two
The feedback signal control dpf regeneration fuel nozzle 9 of number temperature sensor 64 sprays appropriate fuel oil in air inlet pipeline 31, fuel oil
Heating up through DOC3 makes delivery temperature be increased to 550 DEG C or so so as to the regeneration of DPF4, while realizing the desulfurization of SCR catalyst 5；
When diesel engine occurs 5 sulfur poisoning of SCR catalyst, DPF4 need not regenerate, and diesel engine runs on high temperature, high air-fuel
During than operating mode, aftertreatment controller 10 controls electric controlled regulating valve 8 according to the feedback signal of No. two temperature sensors 64 and opens, by portion
Engine exhaust is divided to be introduced directly in air inlet pipeline 31 so that the inlet temperature of SCR catalyst 5 is controlled at 500~550 DEG C, from
And realize the high temperature desulfurizing of SCR catalyst；
When diesel engine occurs 5 sulfur poisoning of SCR catalyst, DPF4 need not regenerate, but diesel engine off-duty is in high temperature, high-altitude
When combustion is than operating mode, aftertreatment controller 10 controls dpf regeneration fuel nozzle 9 according to the feedback signal of No. two temperature sensors 64 and sprays
Appropriate fuel oil is penetrated in air inlet pipeline 31, the regeneration of DPF4 and the desulfurization of SCR catalyst 5 is realized.
Embodiment 1：
Referring to Fig. 1, a kind of diesel SCR catalytic device sulfur poisoning cancellation element, including electromotor 1, turbocharger 2, oxygen
Change catalytic converter DOC3, particulate matter trap DPF4, SCR catalyst 5, bypass line 7, dpf regeneration fuel nozzle 9, it is described
The inlet end of DOC3 is passed sequentially through air inlet pipeline 31, turbocharger 2 and is connected with the exhaustor 11 of electromotor 1, the aerofluxuss of DOC3
End is communicated with SCR catalyst 5 by DPF4, and the SCR catalyst 5 is cuprio zeolite type SCR, and the bypass line 7 enters, arranges
Gas end is communicated with exhaustor 11, air inlet pipeline 31 respectively, and 9, temperature of dpf regeneration fuel nozzle is provided with air inlet pipeline 31
61, NO of sensorXSensor 62, the inlet and outlet end of DPF4 are provided with pressure transducer 63, the entering of SCR catalyst 5,
Exhaust end is respectively arranged with 64, No. two NO of No. two temperature sensorsXSensor 65, is provided with electric controlled regulating valve on bypass line 7
8, and 61, NO of a temperature sensorXSensor 62, the NO of temperature sensor 64, two of pressure transducer 63, twoXSensing
Device 65, electric controlled regulating valve 8, dpf regeneration fuel nozzle 9 are connected with 10 signal of aftertreatment controller.
Referring to Fig. 2, Fig. 3, the using method of the diesel SCR catalytic device sulfur poisoning cancellation element is successively according to following step
Suddenly carry out：
S1：The aftertreatment controller 10 is according to a NOX62, No. two NO of sensorXThe detection data of sensor 65, car
Operating range, fuel consumption and last time eliminate sulfur poisoning and judge whether to need to eliminate with the running time of rear vehicle
The sulfur poisoning of SCR catalyst 5, if desired, into step S2；
S2：The aftertreatment controller 10 is calculated based on the detection data of pressure transducer 63, carbon carrying capacity, limit carbon carrying capacity
Setting value judges whether DPF4 needs regeneration, if desired, into step S4, if need not if enter step S3；
S3：Implement exhaust gas bypass control and enter after sulfur poisoning step S6 to eliminate, the enforcement exhaust gas bypass control is concrete
For：
S31：According to the detection data of a temperature sensor 61, the aftertreatment controller 10 judges whether diesel engine is located
In high temperature, high air-fuel ratio operating mode, if so, into step S34, if it is not, then entering step S32；
S32：The aftertreatment controller 10 judges whether the sulfur accumulated time and SCR conversion efficiency of SCR catalyst 5 declines
To ultimate value, if so, into step S33, if it is not, being then again introduced into step S31；
S33：The aftertreatment controller 10 controls the spray of dpf regeneration fuel oil according to the detection data of No. two temperature sensors 64
Mouth 9 sprays fuel oil in air inlet pipeline 31 to remove the sulfur in SCR catalyst 5；
S34：The aftertreatment controller 10 controls electric controlled regulating valve 8 according to the detection data of No. two temperature sensors 64
Aperture, makes the inlet temperature of SCR catalyst 5 reach 500~550 DEG C, to remove the sulfur in SCR catalyst 5；
S4：The aftertreatment controller 10 controls the spray of dpf regeneration fuel oil according to the detection data of No. two temperature sensors 64
Mouth 9 sprays fuel oil in air inlet pipeline 31, to realize the initiative regeneration of DPF, and removes the sulfur in SCR catalyst 5；
S5：The aftertreatment controller 10 judges whether dpf regeneration completes, if completing, into step S6, if not completing
It is again introduced into step S4；
S6：The aftertreatment controller 10 judges whether the sulfur poisoning of SCR catalyst 5 is removed, if not removing again
Into step S1.
Claims (2)
1. a kind of diesel SCR catalytic device sulfur poisoning cancellation element, including electromotor（1）, turbocharger（2）, oxidation catalysiss
Converter DOC（3）, particulate matter trap DPF（4）, SCR catalyst（5）, the DOC（3）Inlet end pass sequentially through air inlet pipe
Road（31）, turbocharger（2）With electromotor（1）Exhaustor（11）Connection, DOC（3）Exhaust end pass through DPF（4）With SCR
Catalyst converter（5）Communicate, and air inlet pipeline（31）On be provided with a temperature sensor（61）, a NOXSensor（62）, DPF
（4）Inlet and outlet end be provided with pressure transducer（63）, SCR catalyst（5）Inlet and outlet end be respectively arranged with No. two it is warm
Degree sensor（64）, No. two NOXSensor（65）, it is characterised in that：
Described device also includes bypass line（7）, dpf regeneration fuel nozzle（9）, the bypass line（7）Inlet and outlet end point
Not and exhaustor（11）, air inlet pipeline（31）Communicate, bypass line（7）On be provided with electric controlled regulating valve（8）, the dpf regeneration
Fuel nozzle（9）It is arranged on air inlet pipeline（31）On, and a temperature sensor（61）, a NOXSensor（62）, pressure pass
Sensor（63）, No. two temperature sensors（64）, No. two NOXSensor（65）, electric controlled regulating valve（8）, dpf regeneration fuel nozzle
（9）And aftertreatment controller（10）Signal connects.
2. a kind of diesel SCR catalytic device sulfur poisoning cancellation element according to claim 1, it is characterised in that：The SCR
Catalyst converter（5）For cuprio zeolite type SCR.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621188112.5U CN206175032U (en) | 2016-10-28 | 2016-10-28 | Diesel engine SCR catalyst converter sulfur poisoning remove device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621188112.5U CN206175032U (en) | 2016-10-28 | 2016-10-28 | Diesel engine SCR catalyst converter sulfur poisoning remove device |
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| CN206175032U true CN206175032U (en) | 2017-05-17 |
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| CN201621188112.5U Active CN206175032U (en) | 2016-10-28 | 2016-10-28 | Diesel engine SCR catalyst converter sulfur poisoning remove device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401704A (en) * | 2016-10-28 | 2017-02-15 | 东风商用车有限公司 | Sulfur poisoning removal device of SCR catalyst of diesel engine and using method for sulfur positioning removal device |
| CN109026295A (en) * | 2018-08-22 | 2018-12-18 | 东风商用车有限公司 | A kind of system and method deteriorating preprocessor |
| CN109973177A (en) * | 2019-03-29 | 2019-07-05 | 河南科技大学 | A kind of diesel engine after treatment device |
| CN110767268A (en) * | 2019-09-20 | 2020-02-07 | 东风商用车有限公司 | SCR (Selective catalytic reduction) low-efficiency cause analysis method |
| CN112523848A (en) * | 2020-10-29 | 2021-03-19 | 广西玉柴机器股份有限公司 | Method for treating sulfur content in fuel oil and related device |
| CN113047924A (en) * | 2021-03-04 | 2021-06-29 | 广西玉柴机器股份有限公司 | Treatment method and system for diesel engine catalyst |
-
2016
- 2016-10-28 CN CN201621188112.5U patent/CN206175032U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401704A (en) * | 2016-10-28 | 2017-02-15 | 东风商用车有限公司 | Sulfur poisoning removal device of SCR catalyst of diesel engine and using method for sulfur positioning removal device |
| CN106401704B (en) * | 2016-10-28 | 2019-01-04 | 东风商用车有限公司 | A kind of diesel SCR catalytic device sulfur poisoning cancellation element and its application method |
| CN109026295A (en) * | 2018-08-22 | 2018-12-18 | 东风商用车有限公司 | A kind of system and method deteriorating preprocessor |
| CN109026295B (en) * | 2018-08-22 | 2023-09-01 | 东风商用车有限公司 | System and method for deteriorating post-processor |
| CN109973177A (en) * | 2019-03-29 | 2019-07-05 | 河南科技大学 | A kind of diesel engine after treatment device |
| CN110767268A (en) * | 2019-09-20 | 2020-02-07 | 东风商用车有限公司 | SCR (Selective catalytic reduction) low-efficiency cause analysis method |
| CN110767268B (en) * | 2019-09-20 | 2023-05-09 | 东风商用车有限公司 | SCR (selective catalytic reduction) low-efficiency reason analysis method |
| CN112523848A (en) * | 2020-10-29 | 2021-03-19 | 广西玉柴机器股份有限公司 | Method for treating sulfur content in fuel oil and related device |
| CN113047924A (en) * | 2021-03-04 | 2021-06-29 | 广西玉柴机器股份有限公司 | Treatment method and system for diesel engine catalyst |
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