CN205689279U - A kind of SCR aftertreatment system urea supply device - Google Patents
A kind of SCR aftertreatment system urea supply device Download PDFInfo
- Publication number
- CN205689279U CN205689279U CN201620557772.XU CN201620557772U CN205689279U CN 205689279 U CN205689279 U CN 205689279U CN 201620557772 U CN201620557772 U CN 201620557772U CN 205689279 U CN205689279 U CN 205689279U
- Authority
- CN
- China
- Prior art keywords
- carbamide
- urea
- dosing pump
- supply device
- urea supply
- 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.)
- Active
Links
Classifications
-
- 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
Landscapes
- Exhaust Gas After Treatment (AREA)
Abstract
The utility model discloses a kind of SCR aftertreatment system urea supply device, including urea box, urea box is parallel with at least two carbamide dosing pump by wire harness and pipeline.This utility model uses technique scheme to have following technical effect that and single carbamide dosing pump changes into two and the metering parallel connection of pumps of above carbamide, multiple automobile-used small-power carbamide dosing pumps are combined into an entirety, substitute high-power carbamide dosing pump, not only improve the mass production of carbamide dosing pump, significantly reduce again production cost, and can add according to power demand or delete carbamide dosing pump number after carbamide metering parallel connection of pumps, it is greatly improved design, motility, convenience and the interchangeability of coupling；Electromotor urea requirement amount is more preferable with carbamide dosing pump supply matching, can meet demand for different engine powers；Good energy saving property, can effectively reduce consumption；Providing system reliability, after a pump damages, other pump can normally work.
Description
Technical field
This utility model relates to a kind of non-automobile-used heavy-duty diesel oil SCR aftertreatment system urea supply device, belongs to electromotor
Discharge purification treatment technology field.
Background technology
Diesel engine is owing to having the incomparable advantage of gasoline engine, particularly in terms of dynamic property, economy and reliability
CO2 emission value is the lowest, obtains on boats and ships, generating set, railroad engines, mining machinery, large-scale engineering machinery etc.
Extensive application, but the harm that brings of exhaust pollution of diesel engines is increasingly subject to people and pays close attention to.
International Maritime Organization rises on January 1st, 2011 and has been carried out IMO Tier II exhaust method.On January 1st, 2016
Play the discharge standard performing Tire III in control area.The increasingly stringent of country's Abgasgesetz promotes domestic diesel engine to produce
Enterprise has to look for effective way and controls and minimizing discharges pollutants, and SCR (SCR, selective
Catalytic reduction) technology is the optimum selection that current China large diesel engine peculiar to vessel reaches discharging standards.
At present, SCR aftertreatment system structure as it is shown in figure 1, mainly by carbamide dosing pump 1, urea box 3, control system 4,
Air auxiliary urea injection system 7, nozzle 5, SCR catalytic convention design 6 and carbamide dosing pump, urea box, control system etc. zero
The wire harness that parts connect each other forms with pipeline 2, and air auxiliary urea injection system 7 links nozzle 5 by sebific duct；Air
Auxiliary urea injection system 7 includes air compressor 8, air pressure electromagnetic valve for adjusting 9, assists urea injection system from air
Carbamide from nreameter amount pump 1 is crushed droplet by the compressed air of 7, forms spraying, leaves nozzle 5, enters SCR catalysis and turns
Gasifying device 6.
The parts such as wherein carbamide dosing pump 1, urea box 3, and carbamide dosing pump, urea box, control system are each other
The wire harness and the pipeline 2 that connect form urea supply device, are the important component parts of SCR system, and its quality will direct shadow
Ring the performance of SCR system, and carbamide dosing pump 1 is as the parts that mainly comprise of urea supply device, mainly play injection quantitatively
The pivotal role that carbamide is effectively matched with nitrogen oxides in diesel engine vent gas.In prior art, it is common that measured by single carbamide
Pump 1 is sucking-off urea liquid supply SCR catalytic convention design 6 from urea box 3.
A set of SCR aftertreatment system is installed at present and will increase the cost accounting for whole boats and ships 3%-5%, simultaneously in use
During also will produce the carbamide consumption that carbamide fuel oil consumption ratio is 2%-5%, in addition with the working service single-candidate in later stage
Outer expense.This series of extra economic expenditure is also the key factor hindering its Developing Extension, therefore produces in guarantee
Effectively reduce SCR aftertreatment system cost on the basis of quality and become the problem that manufacturer is in the urgent need to address.
Summary of the invention
The technical problems to be solved in the utility model is for above-mentioned technical problem, it is provided that one can realize urea liquid essence
Two and the carbamide dosing pump of more parallel of quasi-supply, reliable, accurate, electromotor urea requirement amount is supplied with carbamide dosing pump
Flux matched property is more preferable, can meet demand, good energy saving property for different engine powers, can effectively reduce consumption, operational reliability,
Can effectively reduce operation and the SCR aftertreatment system urea supply device of maintenance cost.
For solving the problems referred to above, this utility model adopts the following technical scheme that: a kind of SCR aftertreatment system urea supply
Device, including urea box, urea box is parallel with at least two carbamide dosing pump by wire harness and pipeline.
The following is further improvement of the utility model:
Described urea supply device also includes nozzle, and two and above carbamide dosing pump are respectively by pipeline with nozzle even
Connect.
Improve further:
Said two and above carbamide dosing pump are connected with nozzle by stable-pressure device.
Improve further:
Described urea supply device also includes SCR catalytic convention design, and nozzle is connected in SCR catalytic convention design.
Improve further:
Connecting on each carbamide dosing pump has automatic start-stop to switch.
Improve further:
According to working conditions change, each carbamide dosing pump can work alone, and multiple carbamide dosing pumps also can be part or all of
Work.
Improve further:
Described urea supply device also includes control system, and control system is measured with urea box, carbamide respectively by circuit
Pump, nozzle, SCR catalytic convention design connect.
Improve further:
Described urea supply device also includes that air assists urea injection system, air auxiliary urea injection system to pass through glue
Nozzle linked by pipe.
Improve further:
Air auxiliary urea injection system includes air compressor and air pressure electromagnetic valve for adjusting.
A kind of SCR aftertreatment system urea supply method, comprises the steps,
A, signals collecting step, control system gathers the rotating speed of diesel engine, dtc signal, delivery temperature and NOXDischarge etc.
Signal；
B, signal feedback step, the signal collected is processed, sends demand according to control strategy by control system
The control instruction of urea liquid flow；
C, urea liquid supplying step, in parallel two and above carbamide dosing pump pass through nreameter after receiving instruction simultaneously
Measure wire harness and pipeline sucking-off urea liquid from urea box, warp that the parts such as pump, urea box, control system connect each other
It is delivered simultaneously to SCR catalytic convention design after crossing precisely metering.
Improve further:
In step c, ensure that loine pressure is consistent by stable-pressure device.
Improve further:
In step c, the emitted dose of carbamide is to former machine emission status and NO under different operating modesXConversion capability demarcate and
Determine；
Along with being continually changing of operating mode, when power is big, multiple carbamide dosing pumps all run；Power hour, multiple carbamide
Dosing pump all runs, or part carbamide metering pump operation.
This utility model uses technique scheme to have following technical effect that and is changed into by single carbamide dosing pump
Multiple automobile-used small-power carbamide dosing pumps are combined into an entirety by two and the metering parallel connection of pumps of above carbamide
Share a nozzle, substitute high-power carbamide dosing pump, not only improve the mass production of carbamide dosing pump,
Significantly reducing again production cost, production cost lowers at double；Electromotor urea requirement amount supplies with carbamide dosing pump
Answer flux matched property more preferable, demand can be met for different engine powers；Good energy saving property, can effectively reduce consumption；Provide and be
System reliability, after a pump damages, other pump can normally work；Can with the dosing pump of several 10～15 kg/h meet 30～
The requirement of 60 kg/h SCR post processing carbamide flows, and can add according to power demand or delete after carbamide metering parallel connection of pumps
Carbamide dosing pump number, is greatly improved design, motility, convenience and the interchangeability of coupling.
With embodiment, this utility model is elaborated below in conjunction with the accompanying drawings.
Accompanying drawing explanation
Accompanying drawing 1 is the schematic diagram of SCR aftertreatment system urea supply device in this utility model background technology；
Accompanying drawing 2 is the schematic diagram of SCR aftertreatment system urea supply device in this utility model embodiment.
In figure: 1-carbamide dosing pump；2-wire harness and pipeline；3-urea box；4-control system；5-nozzle；6-SCR is catalyzed
Reforming unit；7-air auxiliary urea injection system；8-air compressor；9-air pressure electromagnetic valve for adjusting；10-voltage stabilizing fills
Put.
Detailed description of the invention
Embodiment, as in figure 2 it is shown, a kind of SCR aftertreatment system urea supply device, including urea box 3, urea box 3 leads to
Crossing wire harness and pipeline 2 is parallel with at least two carbamide dosing pump 1, according to working conditions change, each carbamide dosing pump 1 can independent work
Making, multiple carbamide dosing pumps 1 also can partly or entirely work.
Described urea supply device also includes SCR catalytic convention design 6, and SCR catalytic convention design 6 connects nozzle 5,
Two and above carbamide dosing pump 1 are connected with nozzle 5 by pipeline respectively.
Said two and above carbamide dosing pump 1 are connected with nozzle 5 by stable-pressure device 10, it is ensured that loine pressure is consistent,
Ensure that the reliable, accurate of metered injection.
Connecting on each carbamide dosing pump 1 has automatic start-stop to switch.
The emitted dose of carbamide is to former machine emission status and NO under different operating modesXConversion capability demarcate and determine,
Along with being continually changing of operating mode, multiple carbamide dosing pump 1 standard-sized sheets when power is big, the multiple carbamide of power hour measures 1 pump by certainly
Dynamic start stop switch part is opened.
Described urea supply device also includes control system 4, control system 4 by circuit respectively with urea box 3, nreameter
Amount pump 1, nozzle 5, SCR catalytic convention design 6 connect.
Described urea supply device also includes that air assists urea injection system 7, air auxiliary urea injection system 7 to pass through
Nozzle 5 linked by sebific duct；Air auxiliary urea injection system 7 includes air compressor 8, air pressure electromagnetic valve for adjusting 9, from sky
Carbamide from nreameter amount pump 1 is crushed droplet by the compressed air of gas auxiliary urea injection system 7, forms spraying, leaves
Nozzle 5, enters SCR catalytic convention design 6.
During the work of SCR aftertreatment system urea supply device, control system 4 gathers the rotating speed of diesel engine, dtc signal, row
Temperature and NOXThe signals such as discharge, send the control instruction of the urea liquid flow of demand, in parallel two according to control strategy
And above carbamide dosing pump 1 receive instruction after simultaneously mutual by parts such as carbamide dosing pump 1, urea box 3, control systems 4
Between the wire harness and the pipeline 2 sucking-off urea liquid from urea box 3 that connect, ensure that loine pressure is consistent by stable-pressure device 10,
Being delivered simultaneously to SCR catalytic convention design 6 after precisely metering, first urea liquid occurs under high temperature and catalyst action
Pyrolysis and hydrolysis generate ammonia, by NO under then ammonia enters SCR catalyst catalyst actionXReduction, generate nitrogen and
Water, finally enters air, it is achieved that the corresponding nozzle 5 of multiple carbamide dosing pumps 1.
When power is big, multiple carbamide dosing pumps 1 all run；Power hour, multiple carbamide dosing pumps 1 all run, or
Part carbamide dosing pump 1 runs preferably to ensure measuring accuracy.
Total emitted dose is evenly distributed to each carbamide dosing pump 1 by control system 4.The flow of each carbamide dosing pump 1 by
Pwm signal regulation in control system 4, when PWM is less than a threshold value, carbamide dosing pump 1 stops supply, and PWM is higher than a fixed limit
During value, reach maximum stream flow.
Claims (9)
1. a SCR aftertreatment system urea supply device, including urea box (3), it is characterised in that: urea box (3) passes through line
Bundle and pipeline (2) are parallel with at least two carbamide dosing pump (1).
SCR aftertreatment system urea supply device the most according to claim 1, it is characterised in that: described urea supply fills
Putting and also include nozzle (5), two and above carbamide dosing pump (1) are connected with nozzle (5) by pipeline respectively.
SCR aftertreatment system urea supply device the most according to claim 2, it is characterised in that: said two and more than
Carbamide dosing pump (1) is connected with nozzle (5) by stable-pressure device (10).
SCR aftertreatment system urea supply device the most according to claim 1 and 2, it is characterised in that: described urea supply
Device also includes that SCR catalytic convention design (6), nozzle (5) are connected in SCR catalytic convention design (6).
SCR aftertreatment system urea supply device the most according to claim 1, it is characterised in that: each carbamide dosing pump
(1) upper connection has automatic start-stop to switch.
SCR aftertreatment system urea supply device the most according to claim 1, it is characterised in that: according to working conditions change, often
Individual carbamide dosing pump (1) can work alone, and multiple carbamide dosing pumps (1) also can partly or entirely work.
SCR aftertreatment system urea supply device the most according to claim 4, it is characterised in that: described urea supply fills
Put and also include control system (4), control system (4) by circuit respectively with urea box (3), carbamide dosing pump (1), nozzle (5),
SCR catalytic convention design (6) connects.
SCR aftertreatment system urea supply device the most according to claim 4, it is characterised in that: described urea supply fills
Putting and also include air auxiliary urea injection system (7), air auxiliary urea injection system (7) links nozzle (5) by sebific duct.
SCR aftertreatment system urea supply device the most according to claim 8, it is characterised in that: air auxiliary carbamide spray
Penetrate system (7) and include air compressor (8) and air pressure electromagnetic valve for adjusting (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620557772.XU CN205689279U (en) | 2016-06-12 | 2016-06-12 | A kind of SCR aftertreatment system urea supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620557772.XU CN205689279U (en) | 2016-06-12 | 2016-06-12 | A kind of SCR aftertreatment system urea supply device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205689279U true CN205689279U (en) | 2016-11-16 |
Family
ID=57260176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620557772.XU Active CN205689279U (en) | 2016-06-12 | 2016-06-12 | A kind of SCR aftertreatment system urea supply device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205689279U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108625945A (en) * | 2017-03-20 | 2018-10-09 | 天纳克（苏州）排放系统有限公司 | exhaust gas aftertreatment system |
| CN106050369B (en) * | 2016-06-12 | 2019-03-08 | 山东康钧环保科技有限公司 | A kind of SCR aftertreatment system urea supply device and processing method |
| CN111287824A (en) * | 2020-02-21 | 2020-06-16 | 无锡威孚力达催化净化器有限责任公司 | Control method, device and system for urea pump in air-assisted SCR system |
| 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 |
-
2016
- 2016-06-12 CN CN201620557772.XU patent/CN205689279U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050369B (en) * | 2016-06-12 | 2019-03-08 | 山东康钧环保科技有限公司 | A kind of SCR aftertreatment system urea supply device and processing method |
| CN108625945A (en) * | 2017-03-20 | 2018-10-09 | 天纳克（苏州）排放系统有限公司 | exhaust gas aftertreatment system |
| CN111287824A (en) * | 2020-02-21 | 2020-06-16 | 无锡威孚力达催化净化器有限责任公司 | Control method, device and system for urea pump in air-assisted SCR system |
| CN111287824B (en) * | 2020-02-21 | 2022-04-12 | 无锡威孚力达催化净化器有限责任公司 | Control method, device and system for urea pump in air-assisted SCR system |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205689279U (en) | A kind of SCR aftertreatment system urea supply device | |
| CN204933221U (en) | A kind of denitrating flue gas treatment system in conjunction with distributed system | |
| CN102817681B (en) | Solid SCR (selective catalytic reduction) control system for diesel engine | |
| CN106050369B (en) | A kind of SCR aftertreatment system urea supply device and processing method | |
| CN204327283U (en) | A kind of vehicular engine | |
| CN102269031B (en) | Universal type selective catalytic reduction (SCR) injection system | |
| CN101713317A (en) | Method for controlling addition amount of diesel engine tail gas selective catalytic reducing agent | |
| CN202789025U (en) | Urea injection system for reducing emission of nitrogen oxide (NOx) of engine | |
| CN103244241A (en) | A large turbocharged two-stroke diesel engine with exhaust gas purification | |
| CN109882270A (en) | The internal combustion engine discharged nitrous oxides closed-loop control system of ionic current and urea injection in a kind of cylinder | |
| CN202132088U (en) | Universal SCR spraying system | |
| CN107387245A (en) | Diesel engine of locomotive underrun part cylinder deactivation control method | |
| CN103470353B (en) | A kind of SCR system of diesel engine controlling method based on urea decomposition efficiency | |
| CN110090555B (en) | Opposed embedded high-pressure SCR system suitable for low-speed diesel engine for double-turbine ship | |
| CN210858882U (en) | SCR (Selective catalytic reduction) purification system for ship engine tail gas | |
| CN209959324U (en) | SCR urea metering pipeline injection system | |
| CN209800122U (en) | energy-saving and emission-reducing system of diesel engine | |
| CN201874647U (en) | SCR (selective catalyst reduction) injecting head of diesel engine | |
| CN208330572U (en) | Diesel engine cooling EGR discharge treating system | |
| CN110714819A (en) | SCR (Selective catalytic reduction) purification system for ship engine tail gas | |
| CN110566323A (en) | Mounting structure of marine HPSCR auxiliary system | |
| CN201818369U (en) | Diesel engine for heavy-duty car | |
| CN203130208U (en) | Diesel engine selective catalyst reduction injection system | |
| CN101988412A (en) | SCR (selective catalyst reduction) injector head of diesel engine | |
| CN105179118B (en) | A kind of marine low speed diesel exhaust recycles washing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |