CN106555646B - A kind of metering atomising spraying systems of SCR - Google Patents
A kind of metering atomising spraying systems of SCR Download PDFInfo
- Publication number
- CN106555646B CN106555646B CN201611027369.7A CN201611027369A CN106555646B CN 106555646 B CN106555646 B CN 106555646B CN 201611027369 A CN201611027369 A CN 201611027369A CN 106555646 B CN106555646 B CN 106555646B
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- Prior art keywords
- scr
- urea
- valve
- valve body
- air
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Classifications
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- 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]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
-
- 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
- F01N2610/1493—Purging the reducing agent out of the conduits or nozzle
-
- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
- F01N2900/1806—Properties of reducing agent or dosing system
-
- 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
Abstract
The present invention provides a kind of metering atomising spraying systems of SCR, including meter, urea box, SCR air atomizings urea nozzle and air compressor, the meter both ends are equipped with into liquid interface and pressure interface, bottom is equipped with return close into one end of liquid interface, the urea box passes sequentially through urea filter and electrodynamic pump by piping connection on liquid interface, the return is by piping connection on urea box, the pressure interface passes through in the piping connection equipped with check valve to SCR air atomizing urea nozzles, the air compressor is by air cleaner by piping connection to SCR air atomizing urea nozzles.Advantageous effect of the present invention：The meter is not integrated with SCR pumps, so that SCR spraying systems is optionally pumped range wider；Also not integrated with SCR nozzles, and far from the exhaust pipe of engine, cooling device and heat-proof device are not needed, while nozzle is atomized using compressed air, atomizing effect is more preferable.
Description
Technical field
The invention belongs to motor exhaust processing technology fields, more particularly, to a kind of metering atomising spraying systems of SCR.
Background technology
Selective catalytic reduction (SCR) system is generally acknowledged at present reduction diesel engine NOxDischarge most effective post-processing skill
One of art, SCR urea injection systems spray into a certain amount of aqueous solution of urea in exhaust pipe, aqueous solution of urea using evaporation,
Pyrolysis and hydrolytic process obtain reducing agent NH3, NH3It is selective by NO under the effect of the catalystxReduction becomes N2, to real
Now reduce NOxThe purpose of discharge.
Common SCR urea injection systems metering module is integrated with urea pump, or integrated with urea nozzle, although this
Integrated comparatively dense, but be typically necessary and increase cooling device and heat-proof device.
Invention content
In view of this, the present invention is directed to propose a kind of metering atomising spraying systems of SCR, above-mentioned in the prior art to solve
Shortcoming simplifies the system integration.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
A kind of metering atomising spraying systems of SCR, including meter, urea box, SCR air atomizings urea nozzle, electrodynamic pump,
Air compressor, urea filter and air cleaner, the meter both ends are equipped with into liquid interface and pressure interface, and bottom is leaned on
Closely into one end of liquid interface be equipped with return, the urea box pass sequentially through urea filter and electrodynamic pump by piping connection to
Meter on liquid interface, the return is connected directly between by pipeline on urea box, and the pressure of the meter connects
Mouth is by the way that in the piping connection equipped with check valve to SCR air atomizing urea nozzles, the air compressor passes through air-filtering
Device is by piping connection to SCR air atomizing urea nozzles.
Further, the meter includes cushion block, electromagnet and valve body, and the electromagnet and valve body pass through the cushion block
Connection, the cushion block inside is equipped with the armature being mounted below the electromagnet, described to be connect into liquid interface, pressure interface and reflux
Mouth is each provided on the valve body, and valve opening is equipped in the valve body, bullet is installed with by the valve body above the valve opening
The spring seat of honour, the valve opening mounted inside has spring, spring lower seat, spool and plug, the spool and valve opening movable contact, described
Spool is located above plug, and is connect by armature trip bolt with the armature, and the spring seat of honour is connect with spring, described
It is fixed on spring lower seat on the downside of spring, is fixedly connected on the outside of the spring lower seat and spool.
Further, it is additionally provided with the return flow line for connecting return and valve opening lower part in the valve body, and connects valve opening
The balance pressure channel on top and return.
Further, the spool and valve body are sealing couple, the seal spool conical surface are equipped in the spool bottom, in institute
It states valve body and is equipped with sealing conical surface of valve body with spool bottom contact position.
Further, it is equipped with sealing plate below the valve opening.
Further, the control valve of the meter is normally open valve.
Further, the SCR air atomizings urea nozzle is fixed on the exhaust pipe of engine.
Compared with the existing technology, the metering atomising spraying systems of a kind of SCR of the present invention have the advantage that：
Counter design described in the metering atomising spraying systems of SCR of the present invention does not pump with SCR and collects at separate unit
At keeping the optional electrodynamic pump range of SCR spraying systems wider, special SCR metering ejector pumps need not be selected；The meter simultaneously
Measuring device is detached with SCR nozzles, and far from the exhaust pipe of engine, and cooling device is cooled down, and need not also increase heat-proof device, together
When nozzle be atomized using compressed air, atomizing effect is more preferable, makes chemical reaction during vent gas treatment under the action of catalyst
Reaction is more thorough.
Description of the drawings
The attached drawing for constituting the part of the present invention is used to provide further understanding of the present invention, schematic reality of the invention
Example and its explanation are applied for explaining the present invention, is not constituted improper limitations of the present invention.In the accompanying drawings：
Fig. 1 is the metering atomising injection system equipment figures of SCR described in the embodiment of the present invention；
Fig. 2 is the gage structure schematic diagram described in the embodiment of the present invention；
Fig. 3 is the valve body structure schematic diagram described in the embodiment of the present invention；
Valve core structure schematic diagram described in Fig. 4 embodiment of the present invention；
Partial schematic diagram at A when meter described in Fig. 5 embodiment of the present invention opens return flow line；
Partial schematic diagram at A when meter closing volume channel described in Fig. 6 embodiment of the present invention.
Reference sign：
1- meters；2- electromagnet；3- cushion blocks；4- pressure interfaces, 5- balance pressure into liquid interface, the return flow lines 6-, 7-
Channel；8- returns；9- armature trip bolts；10- armature；The 11- springs seat of honour；12- springs；13- spring lower seats；14- valves
Core；15- plugs；16- sealing plates；17- valve bodies；18- valve openings；19- sealing conical surface of valve bodies；The 20- seal spool conical surfaces；21-SCR is empty
Aerosolization urea nozzle；22- air cleaners；23- air compressors；24-SCR catalyst converters；25- urea boxes；26- urea filterings
Device；27- electrodynamic pumps；The 28- exhaust pipes of engine；29- check valves.
Specific implementation mode
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figure 1, a kind of metering atomising spraying systems of SCR, including meter 1, urea box 25, SCR air atomizings urine
Plain nozzle 21, electrodynamic pump 27, air compressor 23, urea filter 26 and air cleaner 22,1 both ends of the meter are equipped with
Into liquid interface 5 and pressure interface 4, bottom is equipped with return 8 close into one end of liquid interface 5, and the urea box 25 leads to successively
Urea filter 26 and electrodynamic pump 27 are crossed by piping connection to meter 1 on liquid interface 5, the return 8 passes through pipe
Road is connected directly between on urea box 25, and the pressure interface 4 of the meter 1 passes through the piping connection equipped with check valve 29 to SCR
In air atomizing urea nozzle 21, the air compressor 23 is by air cleaner 22 by piping connection to SCR air atomizings
In urea nozzle 21.
As shown in Figures 2 to 4, the meter 1 includes cushion block 3, electromagnet 2 and valve body 17, the electromagnet 2 and valve body
17 are connected by the cushion block 3, and 3 inside of the cushion block is equipped with the armature 10 for being mounted on 2 lower section of the electromagnet, and the feed liquor connects
Mouth 5, pressure interface 4 and return 8 are each provided on the valve body 17, valve opening 18 are equipped in the valve body 17, in the valve opening
18 tops are installed with the spring seat of honour 11 by the valve body 17, and 18 mounted inside of the valve opening has spring 12, spring lower seat
13, spool 14 and plug 15, the spool 14 and 18 movable contact of valve opening, the spool 14 are located at 15 top of plug, and with institute
It states armature 10 to connect by armature trip bolt 9, the spring seat of honour 11 is connect with spring 12, and 12 downside of the spring is fixed on
On spring lower seat 13, the spring lower seat 13 is fixedly connected with 14 outside of spool.
It is additionally provided with the return flow line 6 for connecting return 8 and 18 lower part of valve opening in the valve body 17, and connects on valve opening 18
The balance pressure channel 7 in portion and return 8 ensures under solenoid valve normally open, the fluid pressure balance of valve, and valve is made to work
The aqueous solution of urea revealed in the process flows into return line.
The spool 14 is sealing couple with valve body 17, the seal spool conical surface 20 is equipped in 14 bottom of the spool, in institute
It states valve body 17 and is equipped with sealing conical surface of valve body 19 with 14 bottom contact position of spool.
18 lower section of the valve opening is equipped with sealing plate 16, is sealed with the sealing plate 16.
The control valve of the meter 1 is normally open valve, and when being not powered on, control valve keeps it turning on shape under spring force
State forms a circulation passage in valve opening 18 so that the aqueous solution of urea with certain pressure is by return flow line 6 in into flow tube
Into return 8.
The SCR air atomizings urea nozzle 21 is fixed on the exhaust pipe of engine 28, will using the energy of high pressure draught
Aqueous solution of urea is atomized.
Connecting pipe is individually equipped between the electrodynamic pump 27 and urea box 25.
The specific work process of the present embodiment is as follows：
In 1 course of work of meter, spool 14 moves up and down in valve opening 18, when electromagnet 2 is powered, electromagnet 2
Suction is generated to armature 10, armature 10 is with 14 compressed spring 12 of movable valve plug and moves upwards, and makes the seal spool conical surface 20 and valve body
Sealing cone 19 is bonded；When electromagnet 2 powers off, electromagnet 2 disappears to the suction of armature 10, work of the armature 10 in 12 power of spring
It is moved downward under, the seal spool conical surface 20 is made to be separated with sealing conical surface of valve body 19；
As shown in figure 5, when the seal spool conical surface 20 is separated with sealing conical surface of valve body 19, one is formd between sealing cone
The circulation passage of a annular, since return line pressure is relatively low, aqueous solution of urea will not feed pressure pipeline, into liquid interface 5
Interior aqueous solution of urea enters return 8 from the circulation passage of the annular by return flow line 6, then flows back to urea box 25；Together
Shi Pingheng pressure channels 7 make the hydraulic surface up and down of spool 14 be connected to, and to ensure under solenoid valve normally open, the hydraulic coupling of valve is flat
Weighing apparatus, and the aqueous solution of urea for making valve reveal during the work time flows into return line.
As shown in fig. 6, when the seal spool conical surface 20 is bonded completely with sealing conical surface of valve body 19, return flow line disconnects, urine
Plain aqueous solution enters pressure interface 4, open-top check valve 29, subsequently into SCR air atomizer spray nozzles 21；It is compressed simultaneously by air
The air of machine 23 and air cleaner 22 also enters SCR air atomizings urea nozzle 21 together, to entering the urea water of nozzle
Solution is further atomized, and the aqueous solution of urea being atomized finally sprays into the exhaust pipe of engine 28, the exhaust pipe of engine 28
Outlet end be connected in SCR catalyst 24, so that chemical reaction is carried out under the action of catalyst.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (6)
1. a kind of metering atomising spraying systems of SCR, it is characterised in that：Including meter, urea box, the spray of SCR air atomizing urea
Mouth, electrodynamic pump, air compressor, urea filter and air cleaner, the meter both ends are equipped with into liquid interface and pressure
Interface, bottom are equipped with return close into one end of liquid interface, and the urea box passes sequentially through urea filter and electrodynamic pump
By piping connection to meter on liquid interface, the return is connected directly between by pipeline on urea box, the meter
The pressure interface of measuring device is by the piping connection equipped with check valve to SCR air atomizing urea nozzles, the air compressor
By air cleaner by piping connection to SCR air atomizing urea nozzles,
The meter includes cushion block, electromagnet and valve body, and the electromagnet is connected with valve body by the cushion block, the cushion block
Inside is equipped with the armature being mounted below the electromagnet, it is described be each provided at into liquid interface, pressure interface and return it is described
On valve body, it is equipped with valve opening in the valve body, the spring seat of honour, the valve are installed with by the valve body above the valve opening
Hole mounted inside has spring, spring lower seat, spool and plug, the spool and valve opening movable contact, the spool to be located at plug
Top, and connect by armature trip bolt with the armature, the spring seat of honour is connect with spring, fixed on the downside of the spring
On spring lower seat, it is fixedly connected on the outside of the spring lower seat and spool.
2. the metering atomising spraying systems of a kind of SCR according to claim 1, it is characterised in that：It is additionally provided in the valve body
The return flow line of return and valve opening lower part is connected, and connects the balance pressure channel on valve opening top and return.
3. the metering atomising spraying systems of a kind of SCR according to claim 1, it is characterised in that：The spool is with valve body
Couple is sealed, the seal spool conical surface is equipped in the spool bottom, it is close equipped with valve body with spool bottom contact position in the valve body
Seal the conical surface.
4. the metering atomising spraying systems of a kind of SCR according to claim 1, it is characterised in that：It is equipped with below the valve opening
Sealing plate.
5. the metering atomising spraying systems of a kind of SCR according to claim 1, it is characterised in that：The control of the meter
Valve is normally open valve.
6. the metering atomising spraying systems of a kind of SCR according to claim 1, it is characterised in that：The SCR air atomizings urine
Plain nozzle is fixed on the exhaust pipe of engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611027369.7A CN106555646B (en) | 2016-11-16 | 2016-11-16 | A kind of metering atomising spraying systems of SCR |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611027369.7A CN106555646B (en) | 2016-11-16 | 2016-11-16 | A kind of metering atomising spraying systems of SCR |
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| Publication Number | Publication Date |
|---|---|
| CN106555646A CN106555646A (en) | 2017-04-05 |
| CN106555646B true CN106555646B (en) | 2018-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611027369.7A Active CN106555646B (en) | 2016-11-16 | 2016-11-16 | A kind of metering atomising spraying systems of SCR |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114439578A (en) * | 2020-10-30 | 2022-05-06 | 长城汽车股份有限公司 | Urea nozzle, urea injection system and vehicle |
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| CN102758672A (en) * | 2011-04-29 | 2012-10-31 | 北京理工大学 | SCR (silicon controlled rectifier) pump nozzle device |
| CN102979604A (en) * | 2012-11-28 | 2013-03-20 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Reducing agent spraying and metering device |
| CN103958846A (en) * | 2011-11-22 | 2014-07-30 | 罗伯特·博世有限公司 | Metering module featuring air gap insulation |
| CN105626205A (en) * | 2016-03-15 | 2016-06-01 | 茵卡排放控制系统（江苏）有限公司 | Differential pressure type urea pump for SCR exhaust gas after-treatment |
| CN106050369A (en) * | 2016-06-12 | 2016-10-26 | 康佑环保设备有限公司 | Selective catalytic reduction (SCR) after-treatment system urea supply device and treatment method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101164422B1 (en) * | 2010-05-17 | 2012-07-12 | (주)모토닉 | Apparatus of exhaust gas reducing for diesel vehicle |
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2016
- 2016-11-16 CN CN201611027369.7A patent/CN106555646B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806238A (en) * | 2010-03-13 | 2010-08-18 | 中国第一汽车集团公司 | Air-assisted atomized urea reducing agent spraying controlling system of pump power |
| CN201738998U (en) * | 2010-07-21 | 2011-02-09 | 苏州派格力减排系统有限公司 | Constant-pressure metered jetting system |
| CN102748100A (en) * | 2011-04-19 | 2012-10-24 | 苏州派格力减排系统有限公司 | Urea measuring jet pump in SCR (Selective Catalytic Reduction) system |
| CN102758672A (en) * | 2011-04-29 | 2012-10-31 | 北京理工大学 | SCR (silicon controlled rectifier) pump nozzle device |
| CN103958846A (en) * | 2011-11-22 | 2014-07-30 | 罗伯特·博世有限公司 | Metering module featuring air gap insulation |
| CN102979604A (en) * | 2012-11-28 | 2013-03-20 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Reducing agent spraying and metering device |
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| CN106050369A (en) * | 2016-06-12 | 2016-10-26 | 康佑环保设备有限公司 | Selective catalytic reduction (SCR) after-treatment system urea supply device and treatment method |
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| CN106555646A (en) | 2017-04-05 |
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