CN101892888A - Reducing agent filling device for SCR system - Google Patents
Reducing agent filling device for SCR system Download PDFInfo
- Publication number
- CN101892888A CN101892888A CN2010102366902A CN201010236690A CN101892888A CN 101892888 A CN101892888 A CN 101892888A CN 2010102366902 A CN2010102366902 A CN 2010102366902A CN 201010236690 A CN201010236690 A CN 201010236690A CN 101892888 A CN101892888 A CN 101892888A
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- Prior art keywords
- reducing agent
- filling device
- air
- common rail
- scr system
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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 invention provides a reducing agent filling device for an SCR system, which comprises a reducing agent loop, wherein the reducing agent loop inputs reducing agent with proper flow into an exhaust pipe through a nozzle. The reducing agent loop comprises a reducing agent tank for storing the reducing agent, a booster pump for pressurizing the reducing agent in the reducing agent tank, a common rail pipe for storing the reducing agent after being pressurized by the booster pump, and an adjusting electromagnetic valve for controlling the flow of the reducing agent transmitted from the common rail pipe to the exhaust pipe. The invention adopts the electromagnetic valve to control the flow range of the reducing agent, thereby being convenient for controlling the discharge amount of ammonia gas and having more accurate control. Meanwhile, the invention can control the power-off of the booster pump under the working condition that the reducing agent is not needed. In addition, the present invention includes three modular designs, so that individual maintenance can be performed. The invention only needs to simply improve the existing filling device, not only can achieve the effect, but also can save the cost, and has practicability.
Description
Technical field
The present invention relates to selective catalytic reduction (SCR) technical field in the diesel exhaust aftertreatment, specifically be meant the reducing agent filling device of a kind of SCR of being used for system.
Background technique
Contain nitrogen oxide in the diesel exhaust gas and (be called for short NO
x), its main component is NO and NO
2The diesel emission rules are to NO
xDischarge amount to atmosphere limits.The SCR technology is diesel engine NO
xThe major control technology of discharging, this technology sprays into the reducing agent of an amount of flow velocity in the exhaust of diesel engine, and reducing agent generates ammonia through decomposing, under the catalysis of SCR catalyst converter, ammonia and NO
xSelective catalytic reduction reaction takes place, and enters atmosphere behind the generation nitrogen G﹠W.The key reaction that below relates to:
4NO+4NH
3+O
2→4N
2+6H
2O
2NH
3+NO+NO
2→2N
2+3H
2O
Reducing agent filling device is the important component part of SCR system, occupies very big proportion in system cost.Existing reducing agent filling device mainly is made up of diaphragm metering pump, air and liquid mixer, pressurized air loop and relevant valve member.The diaphragm metering pump is used to control the flow of reducing agent; Pressurized air is used to realize the atomizing and the cooling of reducing agent; Air and liquid mixer is used to strengthen the effect of atomizing and cooling.But there are the following problems for prior art:
(1) because there is the big phenomenon of instantaneous output overshoot in the diaphragm metering pump, causes reducing agent instantaneous excessive easily, also occur reducing agent easily and leak peak value;
(2) owing to adopt diaphragm metering pump control reducing agent flow, output flow range is unadjustable;
(3) the diaphragm metering pump is in "on" position all the time, has reduced the working life of diaphragm metering pump, has increased user cost;
(4) the maintenance inconvenience of SCR system just needs to change whole system when a certain subtense angle damages.
Summary of the invention
The purpose of this invention is to provide that a kind of reducing agent range of flow can regulate, and safe and reliable, easy to maintenance, simultaneously can also the cost-effective reducing agent filling device that is used for the SCR system.
A kind of reducing agent filling device that is used for the SCR system, it includes the reducing agent loop, described reducing agent loop will be fit to the reducing agent of flow by in the nozzle input outlet pipe, it is characterized in that: described reducing agent loop includes the reducing agent case of storage and reduction agent, to the suction booster that reducing agent in the reducing agent case pressurizes, store the common rail pipe of reducing agent after the suction booster supercharging and the control reducing agent transfers to the flow of outlet pipe from common rail pipe adjusting solenoid valve.
Be provided with one way stop peturn valve between described suction booster and common rail pipe.
Be provided with pressure control valve between described common rail pipe and reducing agent case.
The outlet of described reducing agent case links to each other with the inlet of suction booster, described supercharging delivery side of pump links to each other with the inlet of one way stop peturn valve, the outlet of described one way stop peturn valve links to each other with the inlet opening of common rail pipe, and the delivery outlet of described common rail pipe links to each other with the inlet of air and liquid mixer by regulating solenoid valve; The flow-off of described common rail pipe links to each other by the inlet of pressure control valve with the reducing agent case.
Described suction booster is provided with independently power supply and power switch.
Reducing agent filling device also includes pressurized air loop and air and liquid mixer, and described pressurized air loop is imported pressurized air in the air and liquid mixer, and described air and liquid mixer enters in the outlet pipe after reducing agent and pressurized air are mixed.
Include the gas cylinder of storing compressed air and the pressure control valve of control pressurized air input air and liquid mixer pressure in the described pressurized air loop; Be provided with one way stop peturn valve between described pressure control valve and air and liquid mixer.
Be provided with the power on/off magnet valve between described gas cylinder and pressure control valve.
The present invention adopts solenoid valve to control the reducing agent flow, thereby is convenient to control the ammonia emission amount in the exhaust, and it is more accurate to control, and the output flow range of reducing agent also can be regulated.Simultaneously, the present invention can control the suction booster outage under the operating mode that does not need reducing agent.In addition, the present invention includes reducing agent loop, pressurized air loop and three modular designs of air and liquid mixer, therefore also can carry out independent maintenance.The present invention only needs existing filling apparatus is carried out simple modifications, can be effective, and also can save cost, has practicability.
Description of drawings
Fig. 1 is a kind of reducing agent filling device of the present invention;
1. reducing agent case, 2. power supply, 3. relay, 4. suction booster, 5. one way stop peturn valve a, 6. common rail pipe, 7. relief valve, 8. proportional electromagnetic valve, 9. gas cylinder, 10. filter, 11. exsiccators, 12. power on/off magnet valves, 13. pressure regulator valves, 14. one way stop peturn valve b, 15. air and liquid mixers.
Embodiment
Below further specify the present invention by specific embodiment:
As shown in Figure 1, a kind of reducing agent filling device that is used for the SCR system, it includes reducing agent loop, pressurized air loop and air and liquid mixer.The reducing agent loop will be fit in the aqueous solution of urea input air and liquid mixer of flow, and the pressurized air loop is imported pressurized air in the air and liquid mixer, and aqueous solution of urea enters outlet pipe after being mixed into gas-liquid mixture by pressurized air in air and liquid mixer.
By entering common rail pipe 6 behind the suction booster 4, passing ratio solenoid valve 8 is imported air and liquid mixer 15 after regulating flow to aqueous solution of urea then from reducing agent case 1 in the reducing agent loop.The outlet of described reducing agent case 1 links to each other with the inlet of suction booster 4, the outlet of described suction booster 4 links to each other with the inlet of one way stop peturn valve a5, the outlet of described one way stop peturn valve a5 links to each other with the inlet opening of common rail pipe 6, and the delivery outlet passing ratio solenoid valve 8 of described common rail pipe 6 links to each other with the inlet of air and liquid mixer 15.The flow-off of described common rail pipe 6 links to each other with the inlet of reducing agent case 1 by relief valve 7.Wherein, power supply 2 is directly controlled suction booster 4 switches by the switch of relay 3, has realized that suction booster 4 can control power on/off as required.And 6 of suction booster 4 and common rail pipes are provided with one way stop peturn valve a5, prevent that the pressure of savings in the suction booster 4 outage back common rail pipes 6 from discharging by suction booster 4.In addition, be provided with relief valve 7 in common rail pipe 6 and the reducing agent case 1, when making in the common rail pipe 6 overpressure, can excessive aqueous solution of urea be refluxed enter in the reducing agent case 1, thereby keep pressure in the common rail pipe 6 by control relief valve 7.
After pressurized air is exported in the pressurized air loop, after the filtration of process filter 10 and the drying of exsiccator 11, make compressed-air actuated constant pressure output by pressure regulator valve 13 again from gas cylinder 9, import at last in the air and liquid mixer 15.Wherein, 13 of exsiccator 11 and pressure regulator valves are provided with power on/off magnet valve 12, make gas circuit can control power on/off as required.In addition, 15 of pressure regulator valve 13 and air and liquid mixers are provided with one way stop peturn valve b14 and prevent that the gas-liquid mixture in the air and liquid mixer 15 from refluxing.
In the air and liquid mixer 15, after pressurized air and aqueous solution of urea are mixed into gas-liquid mixture, enter in the outlet pipe by nozzle the nitrogen oxide in the exhaust is carried out catalytic reduction.The present invention compared with prior art, modular design makes the more convenient maintenance of SCR system.Simultaneously, the present invention also more accurately and reliably, has practicability to the control of aqueous solution of urea.
Claims (8)
1. reducing agent filling device that is used for the SCR system, it includes the reducing agent loop, described reducing agent loop will be fit to the reducing agent of flow by in the nozzle input outlet pipe, it is characterized in that: described reducing agent loop includes the reducing agent case of storage and reduction agent, to the suction booster that reducing agent in the reducing agent case pressurizes, store the common rail pipe of reducing agent after the suction booster supercharging and the control reducing agent transfers to the flow of outlet pipe from common rail pipe adjusting solenoid valve.
2. the reducing agent filling device that is used for the SCR system according to claim 1 is characterized in that: be provided with one way stop peturn valve between described suction booster and common rail pipe.
3. the reducing agent filling device that is used for the SCR system according to claim 1 is characterized in that: be provided with pressure control valve between described common rail pipe and reducing agent case.
4. according to the described reducing agent filling device that is used for the SCR system of claim 1-3, it is characterized in that: the outlet of described reducing agent case links to each other with the inlet of suction booster, described supercharging delivery side of pump links to each other with the inlet of one way stop peturn valve, the outlet of described one way stop peturn valve links to each other with the inlet opening of common rail pipe, and the delivery outlet of described common rail pipe links to each other with the inlet of air and liquid mixer by regulating solenoid valve; The flow-off of described common rail pipe links to each other by the inlet of pressure control valve with the reducing agent case.
5. the reducing agent filling device that is used for the SCR system according to claim 1 is characterized in that: described suction booster is provided with independently power supply and power switch.
6. the reducing agent filling device that is used for the SCR system according to claim 1, it is characterized in that: reducing agent filling device also includes pressurized air loop and air and liquid mixer, described pressurized air loop is imported pressurized air in the air and liquid mixer, and described air and liquid mixer enters in the outlet pipe after reducing agent and pressurized air are mixed.
7. the reducing agent filling device that is used for the SCR system according to claim 6 is characterized in that: include the gas cylinder of storing compressed air and the pressure control valve of control pressurized air input air and liquid mixer pressure in the described pressurized air loop; Be provided with one way stop peturn valve between described pressure control valve and air and liquid mixer.
8. the reducing agent filling device that is used for the SCR system according to claim 6 is characterized in that: be provided with the power on/off magnet valve between described gas cylinder and pressure control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010236690A CN101892888B (en) | 2010-07-26 | 2010-07-26 | Reducing agent filling device for SCR system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010236690A CN101892888B (en) | 2010-07-26 | 2010-07-26 | Reducing agent filling device for SCR system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101892888A true CN101892888A (en) | 2010-11-24 |
| CN101892888B CN101892888B (en) | 2012-10-03 |
Family
ID=43102211
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010236690A Active CN101892888B (en) | 2010-07-26 | 2010-07-26 | Reducing agent filling device for SCR system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101892888B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937061A (en) * | 2012-11-27 | 2013-02-20 | 东风汽车有限公司 | Methanol supply device for fuel-methanol dual-fuel engine and use method |
| WO2016078540A1 (en) * | 2014-11-21 | 2016-05-26 | 天纳克（苏州）排放系统有限公司 | Common rail, application of the common rail, carbamide spraying system, and control method therefor |
| CN105804837A (en) * | 2011-08-22 | 2016-07-27 | 康明斯排放处理公司 | Urea solution pumps having leakage bypass |
| CN107091142A (en) * | 2016-02-18 | 2017-08-25 | 康明斯排放处理公司 | For the adaptive circuit for the input pressure value for controlling after-treatment system |
| US10180096B2 (en) | 2014-06-11 | 2019-01-15 | Tenneco Automotive Operating Company Inc. | Fluid delivery system with line pressure control valve |
| US10202883B2 (en) | 2014-11-21 | 2019-02-12 | Tenneco (Suzhou) Emission System Co., Ltd. | Common rail assembly, urea injection system and application thereof |
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| EP1388648A1 (en) * | 2002-08-09 | 2004-02-11 | Ford Global Technologies, LLC | A Method and System for Freeze Protecting Liquid NOx Reductants for Vehicle Application |
| EP1612381A1 (en) * | 2004-06-30 | 2006-01-04 | Iveco S.p.A. | System and method for injecting a liquid into a gas stream, exhaust gas treatment device and vehicle incorporating said device |
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| JP2007100672A (en) * | 2005-10-07 | 2007-04-19 | Bosch Corp | Exhaust emission control device for internal combustion engine and exhaust emission control method for internal combustion device |
| JP2008038728A (en) * | 2006-08-04 | 2008-02-21 | Bosch Corp | Reducing agent supply device and control method of reducing agent supply device |
| CN101749087A (en) * | 2010-01-07 | 2010-06-23 | 同济大学 | Ammonia selective catalytic reduction method for diesel injected by assistance of compressed natural gas |
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2010
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Patent Citations (6)
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| EP1388648A1 (en) * | 2002-08-09 | 2004-02-11 | Ford Global Technologies, LLC | A Method and System for Freeze Protecting Liquid NOx Reductants for Vehicle Application |
| EP1612381A1 (en) * | 2004-06-30 | 2006-01-04 | Iveco S.p.A. | System and method for injecting a liquid into a gas stream, exhaust gas treatment device and vehicle incorporating said device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105804837A (en) * | 2011-08-22 | 2016-07-27 | 康明斯排放处理公司 | Urea solution pumps having leakage bypass |
| CN105804837B (en) * | 2011-08-22 | 2018-12-14 | 康明斯排放处理公司 | Urea solution pump with leakage bypass |
| CN102937061A (en) * | 2012-11-27 | 2013-02-20 | 东风汽车有限公司 | Methanol supply device for fuel-methanol dual-fuel engine and use method |
| CN102937061B (en) * | 2012-11-27 | 2015-02-18 | 东风汽车公司 | Methanol supply device for fuel-methanol dual-fuel engine and using method of methanol supply device |
| US10180096B2 (en) | 2014-06-11 | 2019-01-15 | Tenneco Automotive Operating Company Inc. | Fluid delivery system with line pressure control valve |
| WO2016078540A1 (en) * | 2014-11-21 | 2016-05-26 | 天纳克（苏州）排放系统有限公司 | Common rail, application of the common rail, carbamide spraying system, and control method therefor |
| US10202883B2 (en) | 2014-11-21 | 2019-02-12 | Tenneco (Suzhou) Emission System Co., Ltd. | Common rail assembly, urea injection system and application thereof |
| US10634034B2 (en) | 2014-11-21 | 2020-04-28 | Tenneco (Suzhou) Emission System Co., Ltd. | Common rail, application of the common rail, carbamide spraying system, and control method therefor |
| CN107091142A (en) * | 2016-02-18 | 2017-08-25 | 康明斯排放处理公司 | For the adaptive circuit for the input pressure value for controlling after-treatment system |
| CN107091142B (en) * | 2016-02-18 | 2019-09-17 | 康明斯排放处理公司 | For controlling the adaptive circuit of the input pressure value of after-treatment system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101892888B (en) | 2012-10-03 |
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Owner name: DONGFENG CAR CO. Free format text: FORMER OWNER: DONGFENG AUTOMOBILE CO., LTD. Effective date: 20130709 |
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Effective date of registration: 20130709 Address after: 430056 Wuhan economic and Technological Development Zone, Hubei Province, Dongfeng Road, No. 1, No. Patentee after: Dongfeng Motor Corporation Address before: 430056 Dongfeng Road, Wuhan Economic & Technological Development Zone, Hubei, Wuhan, China, No. 10 Patentee before: DONGFENG MOTER Co.,Ltd. |