CN103032135A - Urea pump internally arranged type selective catalytic reduction (SCR) reducing agent storage and jetting system - Google Patents
Urea pump internally arranged type selective catalytic reduction (SCR) reducing agent storage and jetting system Download PDFInfo
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- CN103032135A CN103032135A CN2011102939858A CN201110293985A CN103032135A CN 103032135 A CN103032135 A CN 103032135A CN 2011102939858 A CN2011102939858 A CN 2011102939858A CN 201110293985 A CN201110293985 A CN 201110293985A CN 103032135 A CN103032135 A CN 103032135A
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- reducing agent
- urea pump
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- stores
- urea
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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)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention discloses a urea pump internally arranged type selective catalytic reduction (SCR) reducing agent storage and jetting system which comprises a urea box used for storing reducing agent, a urea pump, a metering valve and a heating unit. The metering valve is communicated with a pipeline of the urea pump. The urea pump and the heating unit are respectively arranged in the urea box. According to the urea pump internally arranged type SCR reducing agent storage and jetting system, the urea pump and the heating unit are arranged in the urea box in an integrated mode so that a whole structure of the system is compact. The heating unit heats the reducing agent in the urea box and the reducing agent in a reducing agent transportation pipeline at the same time so that the system structure is simplified and system cost is reduced.
Description
Technical field
The present invention relates to a kind of exhaust gas from diesel vehicle treatment and purification system, relate in particular to the built-in SCR reducing agent of a kind of urea pump and store and ejecting system.
Background technique
Existing known, selective catalytic reduction technology (SCR) is the main flow route of motor-vehicle tail-gas post-processing technology, be about to reducing agent (being called " adding indigo plant " in the industry) through in the atomizing quantitative injection air inlet-outlet pipe, and pass through the SCR catalyzer with the main harmful gas NO in the waste gas
XChange into the nitrogen G﹠W and discharge, reach the purpose of tail gas clean-up, this also is to realize " state IV emission standard " the most general technology path.
In the prior art, the structure of SCR system and control mode are variation, gas system and DENOX2 are arranged without the gas system such as the DENOX1 of BOSCH company, but substantially all be that urea pump is arranged on the urea box outside to realize the control to the metered injection of reducing agent, and each module such as the urea box in such SCR system, urea pump, metering valve all is separate, when ambient temperature is low, not only to heat each module respectively like this, also can cause the difficult arrangement that causes because pipeline is more and leak hidden danger etc.
Summary of the invention
The object of the invention is to overcome the defective of prior art, provide that a kind of design is ingenious, level of integration is high, the built-in SCR reducing agent of lower-cost urea pump stores and ejecting system.
For achieving the above object, the present invention proposes following technological scheme: the built-in SCR reducing agent of a kind of urea pump stores and ejecting system, the urea box, urea pump, metering valve and the heating unit that comprise the storage and reduction agent, described metering valve and described urea pump pipeline connection, described urea pump and heating unit all are arranged in the described urea box, and described heating unit heats the reducing agent in the urea box.
Preferably, also be provided with pressure regulator valve in the described urea box, described pressure regulator valve feeds back with mineralization pressure by the downstream that pressure inlet tube is connected on described urea pump.
Described heating unit comprises intake pipe and outlet pipe, and described intake pipe and outlet pipe extend in the described urea box.
The built-in SCR reducing agent of described urea pump stores with ejecting system and also comprises measurement control unit (DCU), and described measurement control unit signal connects described urea pump and metering valve.Described metering valve is directly installed on the outlet pipe in the described SCR system.
The built-in SCR reducing agent of described urea pump stores with ejecting system and also comprises mixing chamber and nozzle, and described mixing chamber is connected on described metering valve downstream, and described nozzle is connected on the downstream of described mixing chamber.
The built-in SCR reducing agent of described urea pump stores with ejecting system and also comprises the air source of the gas, and described air source of the gas is communicated with described mixing chamber, and the air-flow in the described air source of the gas can fully mix in mixing chamber with the reducing agent that metering valve ejects.
The built-in SCR reducing agent of described urea pump stores with ejecting system and also comprises filter, and described filter is arranged on the upstream of described metering valve.
Described system also comprises solenoid valve and the pressure maintaining valve that is arranged between described air source of the gas and mixing chamber.
Compared with prior art, the present invention is arranged in the urea box urea pump, heating unit and pressure regulator valve are integrated, not only overcome the technical barrier on the implementation, and so that the storage of reducing agent of the present invention and ejecting system compact structure on the whole, and heating unit also heats the reducing agent in the reducing agent delivery line when the reducing agent in the urea box is heated, simplify system architecture, also reduced system cost.
Description of drawings
Fig. 1 is that the built-in SCR reducing agent of urea pump of the present invention stores and ejecting system embodiment one schematic diagram.
Fig. 2 is that the built-in SCR reducing agent of urea pump of the present invention stores and ejecting system embodiment two schematic diagrams.
Embodiment
Below in conjunction with accompanying drawing of the present invention, the technological scheme in the preferred embodiment of the present invention is carried out clear, complete description.
The built-in SCR reducing agent of urea pump that is illustrated in figure 1 as the present invention's the first preferred embodiment stores and ejecting system, this system comprises urea box 1, urea pump 2, filter 12, sensor 14, metering valve 3, mixing chamber 9, air source of the gas 7, heating unit 4 and measurement control unit (DCU) 8 for gas control system processed is arranged; Described urea box 1 is used for the storage and reduction agent, and described urea pump 2 is arranged in the described urea box 1, and to reduce back pressure, the discharge pressure of keeping reducing agent is stable.Described heating unit 4 also is arranged in the described urea box 1, in order in the reducing agent in heating urea case 1 reducing agent in the reducing agent delivery line is heated, can avoid like this unit to heat respectively, the urea pump embedding structure also can be avoided the pumping pipeline is heated separately.Described filter 12, metering valve 3, mixing chamber 9 connect by the pipeline of carrying reducing agent successively, be used for reducing agent filtration, metered injection and with the mixing of air stream.
Specifically, the upstream that described filter 12 is arranged on described metering valve (both can be arranged on outside the urea box, also can be arranged in the urea box), the reducing agent in 12 pairs of delivery lines of described filter carries out filter cleaning, prevents that dust impurity from entering in the delivery line; Described sensor 14 is arranged on the force value that filter 12 and metering valve 3 (being the upstream of metering valve 3) are used for measuring valve 3 upstreams.
Described air source of the gas 7 provides air stream for ejecting system of the present invention, during metered injection, the reducing agent that this air-flow and metering valve 3 eject is in 9 interior can fully mixing of mixing chamber, to improve atomizing and the mixed effect of reducing agent, the reducing agent behind the metered injection is spurted in the outlet pipe 15 by the nozzle 11 of being located at mixing chamber 9 downstreams.
Also be provided with pressure regulator valve 5 in the described urea box 1, described pressure regulator valve 5 is installed in the downstream of described urea pump 2, and be communicated with by pressure inlet tube 13 between the pipeline in described pressure regulator valve 5 and described metering valve 3 downstreams, so consistent feedback of pressure initiation in the pressure in metering valve 3 downstreams and the pressure regulator valve 5, can stablize the pressure difference of metering valve 3 upstream and downstreams by pressure regulator valve 5, the pulsewidth (injection interval) that only needs to control the dosage injection apparatus is controlled emitted dose, reaches the effect of accurate control.
In the present embodiment, described pressure inlet tube 13 is communicated with pressure regulator valve 5 and mixing chamber 9, in the process of the metered injection of reducing agent, the cell pressure value that autoregulation and measurement control unit 8 by pressure regulator valve 5 receives, calculated the pressure reduction of metering valve 3 upstream and downstreams by measurement control unit 8 controls, and action and the injection of control metering valve 3, reach the effect of accurate control.
Preferably, also be provided with solenoid valve 16 and pressure maintaining valve 17 between described air source of the gas 7 and the mixing chamber 9, the break-make of described solenoid valve 16 control air-flows, described pressure maintaining valve 17 steady air flow pressure.
Described measurement control unit DCU8 signal connects described urea pump 2, metering valve 3, sensor 14 and solenoid valve 16, and measurement control unit 8 is controlled the metered injection of urea pump action and metering valve by pressure, and can control the break-make of air-flow.
Described heating unit 4 comprises intake pipe 41 and outlet pipe 42, described intake pipe 41 and outlet pipe 42 extend in the described urea box 1 from top to bottom, described intake pipe 41 and outlet pipe 42 are communicated with by heat exchanger in the bottom, can heat the reducing agent in the urea box 1 when the engine thermal cooling liquid is flowed through intake pipe 41 and outlet pipe 42.
In the present embodiment, described filter 12, sensor 14, metering valve 3, mixing chamber 9 and air source of the gas 7 can be integrated on the described urea box 1, can the pipeline between these parts be heated when urea box 1 interior reducing agent is heated, avoiding separately, heating increases cost.
Preferably, described urea pump is arranged in the described heating system near the heat exchanger, is convenient to reducing agent and aspirates after thawing.
Fig. 2 is the built-in SCR reducing agent storage of the urea pump of second embodiment of the invention and metering system, this system is without gas control system processed, be with embodiment one difference, described metering valve 3 is directly installed on the outlet pipe 15 in the described SCR system, described pressure inlet tube 13 is communicated with pressure regulator valve 5 and outlet pipe 15, need not to use mixing chamber, air element and nozzle, by also realizing essentially identical metered injection effect without gas control system.
The built-in SCR reducing agent of urea pump of the present invention stores with the ejecting system level of integration high, heating effect is good, the highly integrated arrangement space of having saved, control accuracy is high, both can use in gas control system processed is arranged, and also can use in the system processed without gas control, simultaneously, the urea pump embedding structure can reduce back pressure, whole system pressure stability, the working life of improving urea pump.
Claims (9)
1. the built-in SCR reducing agent of urea pump stores and ejecting system, it is characterized in that: comprise urea box, urea pump, metering valve and the heating unit of storage and reduction agent, described metering valve and described urea pump pipeline connection; Described urea pump and heating unit all are arranged in the described urea box, and described heating unit heats the reducing agent in the described urea box.
2. the built-in SCR reducing agent of urea pump according to claim 1 stores and ejecting system, and it is characterized in that: also be provided with pressure regulator valve in the described urea box, described pressure regulator valve feeds back with mineralization pressure by the downstream that pressure inlet tube is connected on described urea pump.
3. the built-in SCR reducing agent of urea pump according to claim 1 stores and ejecting system, and it is characterized in that: described heating unit comprises intake pipe and outlet pipe, and described intake pipe and outlet pipe extend in the described urea box.
4. the built-in SCR reducing agent of urea pump according to claim 1 stores and ejecting system, it is characterized in that: the built-in SCR reducing agent of described urea pump stores with ejecting system and also comprises measurement control unit, and described measurement control unit signal connects described urea pump and metering valve.
5. the built-in SCR reducing agent of the described urea pump of arbitrary claim according to claim 1-4 stores and ejecting system, and it is characterized in that: described metering valve is directly installed on the outlet pipe of SCR system.
6. the built-in SCR reducing agent of the described urea pump of arbitrary claim according to claim 1-4 stores and ejecting system, it is characterized in that: the built-in SCR reducing agent of described urea pump stores with ejecting system and also comprises mixing chamber and nozzle, described mixing chamber is connected on described metering valve downstream, and described nozzle is connected on the downstream of described mixing chamber.
7. the built-in SCR reducing agent of urea pump according to claim 6 stores and ejecting system, it is characterized in that: the built-in SCR reducing agent of described urea pump stores with ejecting system and also comprises the air source of the gas, described air source of the gas is communicated with described mixing chamber, and the air-flow in the described air source of the gas mixes in mixing chamber mutually with the reducing agent that metering valve ejects.
8. the built-in SCR reducing agent of urea pump according to claim 1 stores and ejecting system, it is characterized in that: the built-in SCR reducing agent of described urea pump stores with ejecting system and also comprises filter, and described filter is arranged on the upstream of described metering valve.
9. the built-in SCR reducing agent of urea pump according to claim 1 stores and ejecting system, it is characterized in that: also comprise the solenoid valve and the pressure maintaining valve that are arranged between described air source of the gas and mixing chamber.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110293985.8A CN103032135B (en) | 2011-10-02 | 2011-10-02 | The built-in SCR reducing agent of urea pump stores and ejecting system |
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| CN201110293985.8A CN103032135B (en) | 2011-10-02 | 2011-10-02 | The built-in SCR reducing agent of urea pump stores and ejecting system |
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| CN103032135A true CN103032135A (en) | 2013-04-10 |
| CN103032135B CN103032135B (en) | 2015-11-18 |
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| CN201110293985.8A Expired - Fee Related CN103032135B (en) | 2011-10-02 | 2011-10-02 | The built-in SCR reducing agent of urea pump stores and ejecting system |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103256104A (en) * | 2013-05-21 | 2013-08-21 | 中国第一汽车股份有限公司 | Pump nozzle urea direct injecting system |
| CN103266938A (en) * | 2013-05-21 | 2013-08-28 | 中国第一汽车股份有限公司 | Gas-assisted urea injection system with mixing tube heating method adopted |
| CN103797195A (en) * | 2013-09-25 | 2014-05-14 | 株式会社小松制作所 | Operating vehicle |
| CN104632326A (en) * | 2013-11-08 | 2015-05-20 | 武汉洛特福动力技术有限公司 | Reactant metering and delivering device for internal combustion engine tail gas purification and aftertreatment system |
| CN104948271A (en) * | 2014-03-25 | 2015-09-30 | 浙江福爱电子有限公司 | Ejection metering module for SCR (selective catalytic reduction) and controlling method of ejection metering module |
| CN105986861A (en) * | 2015-02-10 | 2016-10-05 | 安徽艾可蓝节能环保科技有限公司 | SCR tail gas treatment system for engine |
| CN106593586A (en) * | 2016-11-29 | 2017-04-26 | 潍柴动力空气净化科技有限公司 | Urea injection device for engine SCR system |
| 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 |
| CN110295983A (en) * | 2018-03-23 | 2019-10-01 | 罗伯特·博世有限公司 | The cleaning warning system and method for liquid for treating waste gas memory for SCR system |
| CN110374727A (en) * | 2019-09-03 | 2019-10-25 | 湖北农谷环保科技有限公司 | Urea injection system for diesel engine aftertreatment system |
| CN111911273A (en) * | 2020-08-20 | 2020-11-10 | 安徽江淮汽车集团股份有限公司 | Method and system for monitoring urea consumption of vehicle |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103266938A (en) * | 2013-05-21 | 2013-08-28 | 中国第一汽车股份有限公司 | Gas-assisted urea injection system with mixing tube heating method adopted |
| CN103256104A (en) * | 2013-05-21 | 2013-08-21 | 中国第一汽车股份有限公司 | Pump nozzle urea direct injecting system |
| CN103797195B (en) * | 2013-09-25 | 2016-09-28 | 株式会社小松制作所 | Working truck |
| CN103797195A (en) * | 2013-09-25 | 2014-05-14 | 株式会社小松制作所 | Operating vehicle |
| CN104632326A (en) * | 2013-11-08 | 2015-05-20 | 武汉洛特福动力技术有限公司 | Reactant metering and delivering device for internal combustion engine tail gas purification and aftertreatment system |
| CN104632326B (en) * | 2013-11-08 | 2017-02-01 | 武汉芙源生环保技术有限公司 | Reactant metering and delivering device for internal combustion engine tail gas purification and aftertreatment system |
| CN104948271A (en) * | 2014-03-25 | 2015-09-30 | 浙江福爱电子有限公司 | Ejection metering module for SCR (selective catalytic reduction) and controlling method of ejection metering module |
| WO2015154640A1 (en) * | 2014-03-25 | 2015-10-15 | 浙江福爱电子有限公司 | Scr injection metering module and control method |
| CN105986861A (en) * | 2015-02-10 | 2016-10-05 | 安徽艾可蓝节能环保科技有限公司 | SCR tail gas treatment system for engine |
| CN106593586A (en) * | 2016-11-29 | 2017-04-26 | 潍柴动力空气净化科技有限公司 | Urea injection device for engine SCR system |
| CN106593586B (en) * | 2016-11-29 | 2019-07-05 | 潍柴动力股份有限公司 | A kind of urea injection apparatus for engine SCR system |
| CN110295983A (en) * | 2018-03-23 | 2019-10-01 | 罗伯特·博世有限公司 | The cleaning warning system and method for liquid for treating waste gas memory for SCR system |
| CN110295983B (en) * | 2018-03-23 | 2022-07-08 | 罗伯特·博世有限公司 | Purge alarm system and method for an exhaust gas treatment fluid reservoir of an SCR system |
| 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 |
| CN110374727A (en) * | 2019-09-03 | 2019-10-25 | 湖北农谷环保科技有限公司 | Urea injection system for diesel engine aftertreatment system |
| CN110374727B (en) * | 2019-09-03 | 2024-05-31 | 武汉洛特福动力技术有限公司 | Urea injection system for diesel engine aftertreatment system |
| CN111911273A (en) * | 2020-08-20 | 2020-11-10 | 安徽江淮汽车集团股份有限公司 | Method and system for monitoring urea consumption of vehicle |
| CN111911273B (en) * | 2020-08-20 | 2021-06-08 | 安徽江淮汽车集团股份有限公司 | Method and system for monitoring urea consumption of vehicle |
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Granted publication date: 20151118 Termination date: 20171002 |