CN107701272A - A kind of urea supply system with high-pressure blowing function - Google Patents
A kind of urea supply system with high-pressure blowing function Download PDFInfo
- Publication number
- CN107701272A CN107701272A CN201711054296.5A CN201711054296A CN107701272A CN 107701272 A CN107701272 A CN 107701272A CN 201711054296 A CN201711054296 A CN 201711054296A CN 107701272 A CN107701272 A CN 107701272A
- Authority
- CN
- China
- Prior art keywords
- pressure
- air
- valve
- urea
- compressed air
- 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
Links
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
- F01N3/24—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 constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses a kind of urea supply system with high-pressure blowing function, it includes urea liquid feeding assembly, compressed air feeding assembly and hybrid chamber, the compressed air feeding assembly includes the compressed air inlet being sequentially connected, electromagnetic valve component and air pressure check valve, the electromagnetic valve component is connected by outlet pipe with hybrid chamber, and the electromagnetic valve component includes pressure-air magnetic valve, regulated air magnetic valve and pressure maintaining valve, the compressed air intlet of compressed air is divided into two-way, enter outlet pipe through regulated air magnetic valve and pressure maintaining valve all the way, another way enters outlet pipe through pressure-air magnetic valve.Above-mentioned urea supply system uses the low-pressure air after voltage stabilizing in urea pump normal work；And when shutdown purges, pipeline purging is carried out using pressure-air of the another way not Jing Guo voltage stabilizing, may be such that the urea liquid of residual can purge cleaner, the risk of reduction generation air pipe line crystallization.
Description
Technical field
The invention belongs to diesel engine vent gas treatment technology, has height for diesel engine vent gas processing more particularly, to a kind of
The urea supply system of pressure purging function.
Background technology
Continuous strict with state motor vehicle exhaust emissions limit value, the diesel engine as motor vehicle power must install tail additional
Flash Gas Compression Skid System gets to the requirement of regulation.For diesel engine, SCR system (selective catalytic reduction system operating) technology is
A kind of most economical practical exhaust gas processing device.SCR system is by required metered injection to bavin by the urea for vehicle aqueous solution
In the catalyst converter of oil machine blast pipe, the oxynitrides (NOx) in urea liquid and diesel engine vent gas under the catalysis of catalyst,
Catalytic reduction reaction is formed, (NOx) is reduced into harmless water and nitrogen.
One of the core component of urea pump as SCR system, in heavy-duty diesel vehicle, at present using it is more be using pressure
Contracting air come push urea liquid and make its be atomized a kind of air-assisted injection urea pump.The advantages of this urea pump is urea
Solution is mixed with compressed air inside urea pump, and the jet atomization effect of urea liquid is good, can reach higher catalysis
Reaction efficiency.
This air-assisted injection urea pump is all designed with a compressed air voltage stabilizing to ensure the stabilization of injection back pressure
Valve, the pressure-air introduced from vehicle (generally 0.6-1MPa) is after voltage stabilizing, with relatively low and stable pressure (generally
0.3-0.4MPa) mixed with urea liquid, to ensure the pressure stability of hybrid chamber, it is ensured that the measuring accuracy of injection.In reality
Border is in use, this urea pump is easier to urea liquid occurs to backflow into the phenomenon of air pipe line, particularly close to hybrid chamber
Air pipe line.Urea liquid backflows and can not such as purge after air pipe line clean, then can produce urea liquid Crystallization Plugging sky
Air pipe, urea pump is caused to fail.Therefore, the urea pump of this kind of air-assisted injection all devises one and shuts down purging program,
I.e. before urea pump shutdown, air pipe line and hybrid chamber and subsequent pipeline are blown using the compressed air after voltage stabilizing
Sweep, the urea liquid of residual is blown out, prevents urea liquid crystalline polamer.But the low-pressure air after voltage stabilizing is often difficult to
Urea liquid purging is clean, and the failure of air pipe line crystallization still happens occasionally.
The content of the invention
It is an object of the invention to provide a kind of urea supply system with high-pressure blowing function, to solve prior art
Middle air-assisted injection urea pump, which exists, to be difficult to the urea liquid in air pipe line purging the problem of clean.
To use following technical scheme up to this purpose, the present invention：
A kind of urea supply system with high-pressure blowing function, it includes urea liquid feeding assembly, compressed air supplies
To component and hybrid chamber, the outlet end of the urea liquid feeding assembly is connected with the hybrid chamber, and the compressed air supplies
Outlet side to component is connected with the hybrid chamber, and mixed gas outlet is provided with the hybrid chamber, wherein, the compression is empty
Gas feeding assembly includes compressed air inlet, electromagnetic valve component and air pressure check valve, and the compressed air inlet passes through air inlet pipe
Road connects the inlet end of electromagnetic valve component, and the outlet side of the electromagnetic valve component is connected by outlet pipe with hybrid chamber, institute
Setting air pressure check valve on outlet pipe is stated, and the electromagnetic valve component includes pressure-air magnetic valve, regulated air magnetic valve
And pressure maintaining valve, the compressed air intlet of compressed air are divided into two-way, enter outlet through regulated air magnetic valve and pressure maintaining valve all the way
Pipeline, another way enter outlet pipe through pressure-air magnetic valve.
Especially, the urea liquid feeding assembly includes hydraulic pump, hydraulic cavities and hydraulically-controlled one-way valve, and the hydraulic pump is set
Put inlet, the outlet end of the hydraulic pump is connected with hydraulic cavities, the outlet ends of the hydraulic cavities by hydraulically-controlled one-way valve with
The hybrid chamber is connected.
Especially, the pressure maintaining valve is arranged at the back segment of the regulated air magnetic valve along compressed air feeding direction.
Especially, the pressure maintaining valve is arranged at the leading portion of the regulated air magnetic valve along compressed air feeding direction.
Especially, when shutting down purging, the regulated air magnetic valve is closed.
Especially, when shutting down purging, the regulated air magnetic valve is in open mode.
Especially, the air pressure check valve is arranged in the hybrid chamber.
Especially, the hydraulically-controlled one-way valve is arranged in the hydraulic cavities.
Beneficial effects of the present invention are that the urea supply system with high-pressure blowing function exists compared with prior art
During urea pump normal work, the low-pressure air after voltage stabilizing is used；And when shutting down purging, do not pass through voltage stabilizing using another way
Pressure-air carry out pipeline purging, be not only simple in structure, it is easy to accomplish；And it may be such that the urea liquid of residual can purge
It is cleaner, reduce the risk that air pipe line crystallization occurs.
Brief description of the drawings
Fig. 1 is that the system for the urea supply system with high-pressure blowing function that the specific embodiment of the invention 1 provides is former
Reason figure.
Embodiment
Further illustrate technical scheme below in conjunction with the accompanying drawings and by embodiment.
Refer to shown in Fig. 1, Fig. 1 is that the urea with high-pressure blowing function that the specific embodiment of the invention 1 provides supplies
Systematic schematic diagram to system.
In the present embodiment, a kind of urea supply system with high-pressure blowing function includes urea liquid feeding assembly 1, pressure
Contracting air intlet 2, electromagnetic valve component 3, air pressure check valve 4 and hybrid chamber 5, the compressed air inlet 2 are connected by air inlet pipeline 6
The inlet end of electromagnetic valve component 3 is connect, the outlet side of the electromagnetic valve component 3 is connected by outlet pipe 7 with hybrid chamber 5, institute
State air pressure check valve 4 to be arranged on outlet pipe 7 and be located in the hybrid chamber 5, the electromagnetic valve component 3 includes pressure-air
Magnetic valve 30, regulated air magnetic valve 31 and pressure maintaining valve 32, the pressure maintaining valve 32 are arranged at described along compressed air feeding direction
The back segment of regulated air magnetic valve 31.The compressed air intlet 2 of compressed air divides for two-way, all the way through regulated air magnetic valve 31
Enter outlet pipe 7 with pressure maintaining valve 32, another way enters outlet pipe 7 through pressure-air magnetic valve 30, in the outlet pipe 7
Air through air pressure check valve 4 enter hybrid chamber 5 in, be provided with mixed gas outlet 8 on the hybrid chamber 5.
The urea liquid feeding assembly 1 includes hydraulic pump 10, hydraulic cavities 11 and hydraulically-controlled one-way valve 12, the hydraulic pump 10
Inlet 13 is set, and the outlet end of the hydraulic pump 10 is connected with hydraulic cavities 11, and the outlet end of the hydraulic cavities 11 passes through liquid
Pressure check valve 12 is connected with the hybrid chamber 5, and the hydraulically-controlled one-way valve 12 is arranged in the hydraulic cavities 11.
In urea pump normal work, hydraulic pump 10 and regulated air magnetic valve 31 are opened, and pressure-air magnetic valve 30 closes
Closing, the low-pressure compressed air after voltage stabilizing after hybrid chamber 5 mixes forms gaseous mixture by air pressure check valve 4 with urea liquid,
Blended gas outlet 8 sprays.
When shutting down purging, pressure-air magnetic valve 30 is opened, and connects high pressure airline, and urea pump is not had using another way
There is the pressure-air by voltage stabilizing to carry out pipeline purging, now regulated air magnetic valve 31 may be at closed mode, can also
In opening.After shutting down purging and terminating, regulated air magnetic valve 31 and pressure-air magnetic valve 30 are turned off.
Above example is to elaborate the general principle and characteristic of the present invention, and the present invention is not limited by above-mentioned example,
Without departing from the spirit and scope, the present invention also has various change and change, and these changes and modifications are both fallen within
In scope of the claimed invention.The scope of the present invention is defined by the appended claims and its equivalents.
Claims (8)
1. a kind of urea supply system with high-pressure blowing function, it includes urea liquid feeding assembly, compressed air supply
Component and hybrid chamber, the outlet end of the urea liquid feeding assembly are connected with the hybrid chamber, the compressed air supply
The outlet side of component is connected with the hybrid chamber, and mixed gas outlet is provided with the hybrid chamber, it is characterised in that the pressure
Contracting air feeding assembly includes compressed air inlet, electromagnetic valve component and air pressure check valve, and the compressed air inlet is by entering
Air pipe connects the inlet end of electromagnetic valve component, and the outlet side of the electromagnetic valve component is connected by outlet pipe with hybrid chamber
It is logical, air pressure check valve is set on the outlet pipe, and the electromagnetic valve component includes pressure-air magnetic valve, regulated air electricity
Magnet valve and pressure maintaining valve, the compressed air intlet of compressed air are divided into two-way, enter all the way through regulated air magnetic valve and pressure maintaining valve
Outlet pipe, another way enter outlet pipe through pressure-air magnetic valve.
2. the urea supply system according to claim 1 with high-pressure blowing function, it is characterised in that the urea is molten
Liquid feeding assembly includes hydraulic pump, hydraulic cavities and hydraulically-controlled one-way valve, and the hydraulic pump sets inlet, and the hydraulic pump goes out liquid
End is connected with hydraulic cavities, and the outlet end of the hydraulic cavities is connected by hydraulically-controlled one-way valve with the hybrid chamber.
3. the urea supply system according to claim 1 or 2 with high-pressure blowing function, it is characterised in that described steady
Pressure valve is arranged at the back segment of the regulated air magnetic valve along compressed air feeding direction.
4. the urea supply system according to claim 1 or 2 with high-pressure blowing function, it is characterised in that described steady
Pressure valve is arranged at the leading portion of the regulated air magnetic valve along compressed air feeding direction.
5. the urea supply system according to claim 1 or 2 with high-pressure blowing function, it is characterised in that shutdown is blown
When sweeping, the regulated air magnetic valve is closed.
6. the urea supply system according to claim 1 or 2 with high-pressure blowing function, it is characterised in that shutdown is blown
When sweeping, the regulated air magnetic valve is in open mode.
7. the urea supply system according to claim 1 with high-pressure blowing function, it is characterised in that the air pressure list
It is arranged to valve in the hybrid chamber.
8. the urea supply system according to claim 2 with high-pressure blowing function, it is characterised in that the hydraulic pressure list
It is arranged to valve in the hydraulic cavities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711054296.5A CN107701272A (en) | 2017-10-31 | 2017-10-31 | A kind of urea supply system with high-pressure blowing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711054296.5A CN107701272A (en) | 2017-10-31 | 2017-10-31 | A kind of urea supply system with high-pressure blowing function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107701272A true CN107701272A (en) | 2018-02-16 |
Family
ID=61176542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711054296.5A Pending CN107701272A (en) | 2017-10-31 | 2017-10-31 | A kind of urea supply system with high-pressure blowing function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107701272A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108518262A (en) * | 2018-03-21 | 2018-09-11 | 武汉洛特福动力技术有限公司 | Urea pump system and application method with pressurization infiltration cleaning function |
| CN108906794A (en) * | 2018-07-23 | 2018-11-30 | 浙江福爱电子有限公司 | A kind of non-gas helps the clearing apparatus of SCR urea pipe |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806332A (en) * | 2015-03-17 | 2015-07-29 | 中国重汽集团济南动力有限公司 | Integral solenoid valve for air-aided SCR system and control method |
| CN204511587U (en) * | 2015-03-17 | 2015-07-29 | 中国重汽集团济南动力有限公司 | A kind of air assists SCR system integrated electromagnetic valve |
| CN204609994U (en) * | 2015-05-14 | 2015-09-02 | 中国重汽集团济南动力有限公司 | A kind of air-assisted SCR urea injection system |
| CN204984557U (en) * | 2015-09-25 | 2016-01-20 | 苏州亿利亚科汽车系统有限公司 | A electromagnetism valves for in gas drive system |
| CN105464761A (en) * | 2016-01-11 | 2016-04-06 | 南京中船绿洲环保有限公司 | Urea injection system for boat and injection method of urea injection system |
| CN205477842U (en) * | 2016-01-11 | 2016-08-17 | 南京中船绿洲环保有限公司 | Marine urea injection system |
| CN207634149U (en) * | 2017-10-31 | 2018-07-20 | 凯龙高科技股份有限公司 | A kind of urea supply system with high-pressure blowing function |
-
2017
- 2017-10-31 CN CN201711054296.5A patent/CN107701272A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806332A (en) * | 2015-03-17 | 2015-07-29 | 中国重汽集团济南动力有限公司 | Integral solenoid valve for air-aided SCR system and control method |
| CN204511587U (en) * | 2015-03-17 | 2015-07-29 | 中国重汽集团济南动力有限公司 | A kind of air assists SCR system integrated electromagnetic valve |
| CN204609994U (en) * | 2015-05-14 | 2015-09-02 | 中国重汽集团济南动力有限公司 | A kind of air-assisted SCR urea injection system |
| CN204984557U (en) * | 2015-09-25 | 2016-01-20 | 苏州亿利亚科汽车系统有限公司 | A electromagnetism valves for in gas drive system |
| CN105464761A (en) * | 2016-01-11 | 2016-04-06 | 南京中船绿洲环保有限公司 | Urea injection system for boat and injection method of urea injection system |
| CN205477842U (en) * | 2016-01-11 | 2016-08-17 | 南京中船绿洲环保有限公司 | Marine urea injection system |
| CN207634149U (en) * | 2017-10-31 | 2018-07-20 | 凯龙高科技股份有限公司 | A kind of urea supply system with high-pressure blowing function |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108518262A (en) * | 2018-03-21 | 2018-09-11 | 武汉洛特福动力技术有限公司 | Urea pump system and application method with pressurization infiltration cleaning function |
| CN108518262B (en) * | 2018-03-21 | 2019-07-30 | 武汉洛特福动力技术有限公司 | Urea pump system and application method with pressurization infiltration cleaning function |
| CN108906794A (en) * | 2018-07-23 | 2018-11-30 | 浙江福爱电子有限公司 | A kind of non-gas helps the clearing apparatus of SCR urea pipe |
| CN108906794B (en) * | 2018-07-23 | 2024-03-26 | 浙江福爱电子有限公司 | Cleaning device for non-gas-assisted SCR urea pipeline |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100484613C (en) | Flash injector for ammonia selective catalysis reduction nitrogen oxide aftertreatment process | |
| JP4949152B2 (en) | Exhaust gas purification device for internal combustion engine | |
| US20110100341A1 (en) | Method and arrangement for exhaust-gas recirculation in an internal combustion engine | |
| CN101749087B (en) | Ammonia selective catalytic reduction method for diesel injected by assistance of compressed natural gas | |
| CN202100308U (en) | Selective catalytic reduction (SCR) system for urea solution metering injection | |
| CN103511039A (en) | Pneumatic type urea injection system | |
| CN106837489B (en) | A kind of SCR supply spraying system crystallization prevention device and method | |
| CN101793183A (en) | Jet control system utilizing air power to atomize urea reductant | |
| US9957868B2 (en) | Centerline injection system for liquid-only reductant delivery | |
| CN107701272A (en) | A kind of urea supply system with high-pressure blowing function | |
| CN211648282U (en) | SCR urea supply injection system of marine diesel engine | |
| CN103032136B (en) | Selective catalytic reduction (SCR) system with external mixing nozzle metering structure | |
| CN207634149U (en) | A kind of urea supply system with high-pressure blowing function | |
| KR20200063229A (en) | Method for operating diesel engine and diesel engine with NH3 concentration test | |
| CN108979802A (en) | A kind of urea pump pump pressure control method of no pressure sensor | |
| US9163542B2 (en) | Reducing agent dosing system for injection reducing agent into the exhaust gas flow of an internal combustion engine | |
| CN113931721A (en) | Engine exhaust hydrocarbon injection system and control strategy thereof | |
| CN103470351A (en) | Diesel engine tail gas selective catalytic reducing agent adding device and method | |
| CN203499777U (en) | Pneumatic urea injection system | |
| CN202718734U (en) | Environment friendly tail gas exhaust system | |
| CN102688712B (en) | Mixer for urea feeding unit | |
| KR101892327B1 (en) | Method of operating an internal combustion engine and an internal combustion engine arrangement | |
| CN104295350A (en) | Engine system and control method thereof | |
| CN104074577B (en) | A kind of method improving SCR system of diesel engine urea pyrolysis hydrolysis efficiency | |
| CN104121479B (en) | LNG tank car BOG injection recovery system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180216 |