CN106437957A - Tail gas purifying device of diesel engine postprocessing system - Google Patents

Tail gas purifying device of diesel engine postprocessing system Download PDF

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Publication number
CN106437957A
CN106437957A CN201611083753.9A CN201611083753A CN106437957A CN 106437957 A CN106437957 A CN 106437957A CN 201611083753 A CN201611083753 A CN 201611083753A CN 106437957 A CN106437957 A CN 106437957A
Authority
CN
China
Prior art keywords
urea
nozzle
pump
tail gas
control module
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
CN201611083753.9A
Other languages
Chinese (zh)
Inventor
赵栋
高世亮
魏宏
高居顺
孙祥
左富勇
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.)
Environmental Protection Science And Technology (yantai) Co Ltd
Original Assignee
Environmental Protection Science And Technology (yantai) 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 Environmental Protection Science And Technology (yantai) Co Ltd filed Critical Environmental Protection Science And Technology (yantai) Co Ltd
Priority to CN201611083753.9A priority Critical patent/CN106437957A/en
Publication of CN106437957A publication Critical patent/CN106437957A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • 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
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • 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
    • 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

Abstract

The invention relates to a tail gas purifying device of a diesel engine postprocessing system. The tail gas purifying device comprises a DCU control module, a urea pump, a urea box and a urea nozzle. The urea pump is installed in the urea box. A feeding port of the urea pump is connected with a urea solution in the urea box. The urea pump is connected with the DCU control module through a circuit. The urea pump is connected with the urea nozzle through a urea jet pipe. The urea nozzle is installed in an exhaust pipe. A vibration atomizer is installed at the front end of the urea nozzle. The vibration atomizer is connected with the DCU control module through a circuit. The tail gas purifying device has the beneficial effects that as existence of the vibration atomizer, the urea solution can achieve a good urea atomizing effect without air auxiliary jetting or electromagnetic valve high-pressure control, an atomizing effect lower than 10 micrometers can be achieved through high-fine atomization, and the tail gas purifying device is applicable to air-source-free vehicles.

Description

A kind of exhaust gas cleaner of diesel engine aftertreatment system
Technical field
The present invention relates to a kind of exhaust gas cleaner, more particularly, to a kind of exhaust gas cleaner of Diesel engine, belong to Diesel motor exhaust purification treatment technology field.
Background technology
Exhaust emissions with regard to diesel vehicle has two kinds of main upgrading schemes in state four epoch, and a class is by using choosing Nitrogen oxides in tail gas are processed, the operation principle of this technology by selecting property catalysis reduction (SCR) technology using urea liquid It is：Tail gas enters exhaustor, is provided with urea nozzle, sprays into urea for vehicle solution, carbamide occurs at high temperature on exhaustor Ammonia is generated, inside catalyst converter, ammonia and nitrogen oxides occur reduction reaction, generate nitrogen and water after hydrolysis and pyrolytic reaction, Thus reaching the effect of cleaning of off-gas.A class is also had to be by particle trapper (DPF) or particulate catalyst transducer (DOC), pin EGR (waste gas recirculation) technology that the microgranule that burning is produced is processed.
Two kinds of technology paths of EGR and SCR are used in countries such as America and Europes, and they can realize Europe IV and Europe V Discharge standard, it is contemplated that the problems such as cost and technology, domestic main flow diesel engine manufacturing enterprise is more by mesh at present Light has turned to SCR, continues the major technique direction of upgrading as the discharge of following domestic diesel engine.SCR locates as after one kind Reason technology, is applied to reduce the NO discharge of automobile, the core of SCR is the feed system of reducing agent.
The performance of SCR system is largely dependent upon gaseous ammonia being uniformly distributed on a catalyst.And it is uniform to realize it The key of distribution is being uniformly distributed and the decomposition completely of droplet particle and fully gasification of carbamide spraying.And in prior art In, it is to carry out mixed aerosol in carbamide dosing pump using compressed air and urea liquid, because Tail Pipe Temperature is too high, can make Obtain gas-liquid mixture highly volatile or the crystallization at high temperature that urea liquid produces, result in blockage nozzle, and this mode can not It is applied to depletion of QI source vehicle, further, since this system bulk is big, carriage type cannot be installed, need to increase accessory mount, cooperation peace It is contained on car domain, cause cost to increase.
Content of the invention
The present invention is directed to the deficiency of the SCR system presence that existing diesel automobile exhaust is processed, and provides a kind of Diesel engine The exhaust gas cleaner of after-treatment system.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：
A kind of exhaust gas cleaner of diesel engine aftertreatment system, including DCU control module, urea pump, urea box, Urea nozzle, described urea pump is installed in urea box, and the charging aperture of described urea pump is connected with the urea liquid in urea box Connect, described urea pump is connected with DCU control module by circuit, described urea pump passes through carbamide playpipe and urea nozzle phase Connect, described urea nozzle is installed in exhaustor it is characterised in that described urea nozzle front end is provided with vibration nebulizer, Described vibration nebulizer passes through connection with DCU control module.
The invention has the beneficial effects as follows：
1) due to the presence of oscillating-atomizing device of spraying, urea liquid without air-assisted injection and electromagnetic valve high voltage control is The carbamide spray effect that can reach, the high-precision fine atomization atomizing effect that can reach less than 10 μm is it is adaptable to depletion of QI source vehicle.
2) concussion of vibration nebulizer plays the role of vibration removing it is ensured that urea nozzle does not block to carbamide at nozzle And cleaning, prevent foreign body from retaining at urea nozzle mouth.
3) spraying use finishes rear urea pump and can be directly connected to vehicle cleaning agent, carries out urea pump interior conduit and carbamide injection Pipe, the cleaning of urea nozzle, ensure that the carbamide in urea tube does not remain and urea crystals dissolving, prevent from causing urea pump and carbamide The blocking of nozzle.
4) this purifier reduction in bulk is 1/4 of reducing agent injection apparatus in existing SCR system, can be conveniently suitable for Compact car.
Brief description
Fig. 1 is the structural representation of exhaust gas cleaner of the present invention；
Fig. 2 is vibration schematic view of the mounting position in urea nozzle for the nebulizer；
In Fig. 1,1, urea box；2nd, urea pump；3rd, DCU control module；4th, carbamide playpipe；5th, urea nozzle；6th, vibrate Nebulizer.
Specific embodiment
Below in conjunction with example, the principle of the present invention and feature are described, example is served only for explaining the present invention, and Non- for limiting the scope of the present invention.
As shown in Figure 1, 2, a kind of exhaust gas cleaner of diesel engine aftertreatment system, including DCU control module 3, Urea pump 2, urea box 1, urea nozzle 5, urea pump 2 is installed in urea box 1, the urine in the charging aperture of urea pump and urea box Plain solution is connected, and urea pump is connected with DCU control module 3 by circuit, and urea pump passes through carbamide playpipe 4 and carbamide spray Mouth is connected, and urea nozzle is installed in exhaustor, and urea nozzle front end is provided with vibration nebulizer 6, vibration nebulizer and DCU Control module passes through connection.
Its work process is as follows：
1) after vehicle launch, urea pump carries out self-inspection, if be in normal condition, carries out pre-filled, waits carbamide injection Instruction.
2) DCU control module sends carbamide jeting instruction, and after carbamide jeting instruction sends, carbamide pump startup measures, and carries out Carbamide metering and jet atomization process, in atomization process, provide kinetic energy that carbamide is pushed to urea nozzle, nozzle by urea pump The vibration nebulizer of front end is started working, and urea liquid is broken up atomization by ultrasound wave.Vibration nebulizer device is to nozzle simultaneously Place's urea crystals have vibration scavenging action it is ensured that urea nozzle does not block and cleans, and prevent foreign body from retaining at urea nozzle mouth.
3) DCU control module sends emptying instruction to urea pump, and carbamide pump work is by carbamide pumpback in playpipe and nozzle To urea box, in nozzle, vibration nebulizer quits work, and vehicle glass cleaning agent is drawn into playpipe and spray by urea pump In mouth.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and Within principle, any modification, equivalent substitution and improvement made etc., should be included within the scope of the present invention.

Claims (1)

1. a kind of exhaust gas cleaner of diesel engine aftertreatment system, including DCU control module, urea pump, urea box, urine Plain nozzle, described urea pump is installed in urea box, and the charging aperture of described urea pump is connected with the urea liquid in urea box, Described urea pump is connected with DCU control module by circuit, and described urea pump is connected with urea nozzle by carbamide playpipe Connect, described urea nozzle is installed in exhaustor it is characterised in that described urea nozzle front end is provided with vibration nebulizer, institute State vibration nebulizer and pass through connection with DCU control module.
CN201611083753.9A 2016-11-30 2016-11-30 Tail gas purifying device of diesel engine postprocessing system Pending CN106437957A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611083753.9A CN106437957A (en) 2016-11-30 2016-11-30 Tail gas purifying device of diesel engine postprocessing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611083753.9A CN106437957A (en) 2016-11-30 2016-11-30 Tail gas purifying device of diesel engine postprocessing system

Publications (1)

Publication Number Publication Date
CN106437957A true CN106437957A (en) 2017-02-22

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109236428A (en) * 2018-11-12 2019-01-18 南京蔚岚环境技术研究院有限公司 gear type urea pump system and working method
CN109296424A (en) * 2018-11-12 2019-02-01 南京蔚岚环境技术研究院有限公司 Vehicle exhaust gas purification system and working method
CN109381992A (en) * 2018-11-12 2019-02-26 南京蔚岚环境技术研究院有限公司 Urea pump control system, exhaust gas purification system and working method
CN111663982A (en) * 2019-03-06 2020-09-15 彭志军 Fuel or urea ultrasonic gasification device and motor vehicle exhaust system thereof
CN113090371A (en) * 2021-05-06 2021-07-09 无锡威孚力达催化净化器有限责任公司 Portable SCR system urea nozzle testing arrangement and system
CN113339112A (en) * 2021-06-30 2021-09-03 同济大学 SCR (Selective catalytic reduction) system for preventing urea crystallization and control method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2537820Y (en) * 2002-04-24 2003-02-26 北京金杯贸易有限责任公司 Automatic control high efficiency purifier for automobile tail gas
JP3552562B2 (en) * 1998-12-22 2004-08-11 トヨタ自動車株式会社 Exhaust gas purification device for internal combustion engine
CN105019988A (en) * 2015-08-03 2015-11-04 包头北大工道发动机技术有限公司 Vehicle-mounted urea solution metering, ultrasonic atomizing and supplying device
EP2957737A1 (en) * 2013-02-14 2015-12-23 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Engine exhaust-gas purification device
CN205315084U (en) * 2015-12-24 2016-06-15 东风康明斯发动机有限公司 Vent gas treatment system in is assisted in diesel engine electrical heating

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3552562B2 (en) * 1998-12-22 2004-08-11 トヨタ自動車株式会社 Exhaust gas purification device for internal combustion engine
CN2537820Y (en) * 2002-04-24 2003-02-26 北京金杯贸易有限责任公司 Automatic control high efficiency purifier for automobile tail gas
EP2957737A1 (en) * 2013-02-14 2015-12-23 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Engine exhaust-gas purification device
CN105019988A (en) * 2015-08-03 2015-11-04 包头北大工道发动机技术有限公司 Vehicle-mounted urea solution metering, ultrasonic atomizing and supplying device
CN205315084U (en) * 2015-12-24 2016-06-15 东风康明斯发动机有限公司 Vent gas treatment system in is assisted in diesel engine electrical heating

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109236428A (en) * 2018-11-12 2019-01-18 南京蔚岚环境技术研究院有限公司 gear type urea pump system and working method
CN109296424A (en) * 2018-11-12 2019-02-01 南京蔚岚环境技术研究院有限公司 Vehicle exhaust gas purification system and working method
CN109381992A (en) * 2018-11-12 2019-02-26 南京蔚岚环境技术研究院有限公司 Urea pump control system, exhaust gas purification system and working method
CN111663982A (en) * 2019-03-06 2020-09-15 彭志军 Fuel or urea ultrasonic gasification device and motor vehicle exhaust system thereof
CN113090371A (en) * 2021-05-06 2021-07-09 无锡威孚力达催化净化器有限责任公司 Portable SCR system urea nozzle testing arrangement and system
CN113339112A (en) * 2021-06-30 2021-09-03 同济大学 SCR (Selective catalytic reduction) system for preventing urea crystallization and control method thereof
CN113339112B (en) * 2021-06-30 2022-09-20 同济大学 SCR (Selective catalytic reduction) system for preventing urea crystallization and control method thereof

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Application publication date: 20170222

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