CN102733912B - The preparation of a kind of solid ammonia storage material for aftertreatment control unit and fill method - Google Patents
The preparation of a kind of solid ammonia storage material for aftertreatment control unit and fill method Download PDFInfo
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- CN102733912B CN102733912B CN201210220179.2A CN201210220179A CN102733912B CN 102733912 B CN102733912 B CN 102733912B CN 201210220179 A CN201210220179 A CN 201210220179A CN 102733912 B CN102733912 B CN 102733912B
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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
- 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
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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
Abstract
The present invention relates to the aftertreatment control unit of the active matter storing and supplying ammonia of a kind of pump auxiliary afterheat manner, it is characterized in that: electronic control unit connects electromagnetic valve by signal wire harness, gas transfer pump, proportioning valve, gas inlet temperature sensor, NOX sensor, pressure transducer, autoclave temperature sensor connects the signal input part of electronic control unit by holding wire, anti-icing fluid conveying pipe is through inside autoclave, solid ammonia storage material is filled in autoclave, air filter is positioned at the outlet side of autoclave, the induction end of autoclave temperature sensor is inserted in solid ammonia storage material, air filter is connected with reducing agent conduit by reducing gas conveying pipe, SCR postprocessor outlet side connects exhaust emission tube.It possesses feature flexibly, and when can not only meet vehicle low-temperature cool starting, emission control target, inexpensive, and reliability is high, easy to use；Meet the application demand of future automobile industry.
Description
Technical field
The present invention relates to preparation and the fill method of a kind of solid ammonia storage material for aftertreatment control unit, be applied to
The SCR post processing industry of vehicle exhaust, is also applied for the FCEV energy-storage system of fuel cell.
Background technology
Currently, the whole world faces the integration challenges of the energy and environment.Technological means at the emission compliance of orthodox car selects
Aspect, people still suffer from many difficult problems, such as, the aspect such as technical approach how selecting post processing.
SCR (Selective Catalytic Reduction) catalyzed conversion reduction technique is traditional post processing skill
Art.The essence of traditional SCR technology of this employing liquid area is to utilize carbamide at high temperature to decomposite ammonia, as reducing agent
Ammonia and engine exhaust in NOX react under the comprehensive function of catalyst and temperature, generate nontoxic under preferable operating mode
N2And H2O, thus reach the purpose purified.
Traditional SCR has lot of advantages, for example, it is possible to have 50 ~ 85% in the range of delivery temperature 250 ~ 550 C
NOX removal efficiency, and can effectively reduce the emission level of PM；Traditional SCR can easily meet Europe 4 and Europe 5 level, it may have
Reach the potentiality of Europe 6 level；Reaching traditional SCR technology that Europe 4 uses at present, the fuel oil consumption of electromotor can reduce by 3 ~ 6%；Pass
The SCR catalyst of system does not contains noble metal, compares advantage of lower cost；Traditional SCR quality to fuel oil for vehicles, particularly sulfur contains
Measure insensitive.Analyzing based on above, traditional SCR post-processing technology is also relatively suitable for vehicle condition and the fuel oil for vehicles shape of China
Condition.
If in the vehicle-mounted SCR post-processing technology that China's popularization and application are traditional, it is necessary to resolve carrier, catalyst, carbamide
Reducing agent adds supply network, the dosage of carbamide reducing agent, the atomized spray of carbamide reducing agent, SCR catalyst conversion efficiency, ammonia
The vital technological difficulties such as amount of leakage and system matches.
The upgrading each time of automobile emission standard, all produces such or such shock effect to automobile industry.In
State 4 standard of state repeatedly postpones the timetable of enforcement, is not only the nonsynchronous sole cause of standard of fuel, also faces complexity
The problem that the service facility of the carbamide reducing agent socialization of society's matching system and liquid is built, such as, after state 4 standard implementation,
Immediately can be to the ECU(control unit needed for traditional SCR system operating) and DCU(metering units) produce demand, it is contemplated that mesh
The electric-control systems such as front vehicle-mounted ECU are all imported products, and the DCU of domestic enterprise's independent development is difficult to carry out communication coupling therewith,
Whereas if the employing import product of ECU and DCU system 100%, not only price is the highest, and user is difficult to accept, and there is goods
The problem that source is at full stretch, is also faced with after-sale service technology and the problem of cost of complexity, constrains sending out of whole automobile industry
Exhibition and progress.Additionally, the liquid area reducing agent used by traditional SCR system faces freezed in winter and the problem of insulation defrosting,
This also result in the complicated reason with poor stability of traditional SCR system.
Therefore, low cost how is obtained and in high performance after-treatment system is the core advancing this art progress
Hold.Inorganic salt can be as the good choice of technology of following SCR system to ammonia adsorption-desorption characteristics.
Some salts of technical grade, such as, chloride and their mixture such as strontium chloride, magnesium chloride or calcium chloride,
With ammonia with the use of system, the heat absorption of the adsorption-desorption process of the most above-mentioned chloride and ammonia and exothermic phenomenon, ripe
The refrigeration system of large cold storage being applied to industry.
It is the general principles of chemistry that above-mentioned anhydrous chloride and ammonia carry out chemisorbed, in theory the chlorination of a molecule
Thing can adsorb the ammonia of 6 ~ 8 molecules, forms stable complex, and ammonia abjection during heating, along with going deep into of research, Ren Menfa
Existing, the adsorption-desorption model of these chlorides and ammonia and the principles of chemistry can be completely applied to the SCR system of motor vehicle tail-gas purifying
System.
In national patent Information Network, it is the theme word and search storing up ammonia, ' a kind of gas of Patent No. CN201120099229.7
Phase method hexamethylenamine tail gas ammonia retracting device ', ' ammonia of joining for machine room of refrigerated warehouse connects Patent No. CN201020677361.7
Mechanism ' feature that is not related in the present invention with ' composite functional ammonia storage device ' of Patent No. CN201020269811.9 becomes
Point.The patent of ' a kind of ammonia steaming device ' of Patent No. CN200520057558.X is that one carries out ammonia nitrogen to ammonia nitrogen industrial wastewater
Get rid of the environment protection treating device of process, be also not related to the characteristic component in the present invention.Uncorrelated with the present invention.
' method and system for the work of SCR catalyst is tested ' of Patent No. CN201010244091.5
2 inventions with ' operation method of SCR exhaust after-treatment system and the diagnostic method ' of Patent No. CN200880104697.X
Provide a kind of for SCR (SCR) catalytic converter and traditional liquid ureaclastic ammonia dispensing module with control
System processed, is not involved with inventive feature composition.
The invention application of ' preparation method of a kind of efficient low-temperature ammonia-storing material ' of Patent No. CN200910197860.8
In SCR aftertreatment system, feature is to use amino borane ammino-complex ammonia BH3 (NH3) n (n=1 ~ 3)；Room temperature maximum storage ammonia amount
Up to 62.4wt%, but, it is contemplated that amino borane expensive, there is higher blast and burning grade, be not suitable for common
The high-volume popularization and application of industrial circle.
The invention of ' storage and the solid material of delivering ammonia ' of Patent No. CN200580026626.9 relates to storage with defeated
Send the solid material of ammonia.The solid material of this storage ammonia includes Ma(NH3)nXzIonic salt, salt solid material by mould straight
Connect high-pressure molding, such as, make cylinder, then arranged together for a lot of this cylinders.The maximum of this patent lacks
Point is that cylinder is the most closely knit, and each ammonolysis carries out the saturated absorption of ammonia again and takes long enough after sucking into, such as 4 ~ 6
Hour, efficiency is the lowest, and this, for unusual inconvenience from the point of view of the SCR storage ammonia system of application on automobile, becomes and limit its application
Reason.
' ammonia storage device purposes in energy production ' of Patent No. CN200580009219.7, this invention relates to one
Generator unit, comprising formula is Ma(NH3) nXzAmmonia absorb with release salt, this patent is primarily adapted for use in fuel cell system.?
Refer to property material in the claim 4 of this patent be such salt or be positioned on porous carrier materials, what statement is not
Planting porous material, those skilled in the art cannot be implemented.
The invention of ' a kind of amido complex compound and its production and use ' of Patent No. CN200710156866.1 is public
Open a kind of amido complex compound and its production and use.The composition of this amido complex compound is MXm(NH3)n, this invention is involutory
Become the separation of ammonia in circulating air used by ammonia process.Claim relates merely to the preparation technology mistake of this ammonobase complex
Journey.
The patent of ' the high density storage of ammonia ' of Patent No. CN200680005886.2 comprises ammonia absorption/desorption solid material
Material solid ammonia storage and conveying material, described be compacted to density more than theoretic skeleton density 50% storage and conveying
Material provides solid ammonia storage material, and the metal salt solid material described in this patent is also the type that is molded directly into, and statement have employed viscous
Knot agent, only states and is probably silicon dioxide fibre binding agent, the most not the dosage ratio of have employed, do not clearly state it
The thin item of the composition that it is used, professional and technical personnel almost cannot implement.
Retrieval and the analysis of above-mentioned patent show, adsorb with activity storage ammoniate and resolve ammonia, defining at vehicle
The after-treatment system of upper application is also not seen reported.
Summary of the invention
It is an object of the invention to provide preparation and the filling of a kind of solid ammonia storage material for aftertreatment control unit
Method, which employs the compositions of active material, porous material and binding agent composition as storing up ammonia and putting the carrier of ammonia；Start
The waste heat of machine coolant heats, and relies on control unit and one group of electromagnetic valve or proportioning valve, it is achieved the dosage conveying of ammonia side
Just importing SCR aftertreatment system, it is achieved the removal to NOX；Simplified system, improves reliability, the most significantly reduces cost,
Eliminate the obstacle of large-scale industry popularization and application.
The technical scheme is that and be achieved in that: the system of a kind of solid ammonia storage material for aftertreatment control unit
Standby and fill method, by electromotor, anti-icing fluid conveying pipe, electromagnetic valve, autoclave, solid ammonia storage material, air filter, charging
Mouth, pressure transducer, standby pipe valve, autoclave temperature sensor, reducing gas conveying pipe, electronic control unit, proportioning valve, tail
Gas inlet temperature sensor, NOX sensor, reducing agent conduit, tail gas enter pipe, exhaust emission tube, SCR postprocessor, gas
Delivery pump forms, it is characterised in that: electronic control unit connects electromagnetic valve, gas transfer pump, proportioning valve, tail by signal wire harness
Gas inlet temperature sensor, NOX sensor, pressure transducer, autoclave temperature sensor connect Electronic Control by holding wire
The signal input part of unit, anti-icing fluid conveying pipe and engine fluid Cascade System or in parallel, anti-icing fluid conveying pipe is through resistance to
Inside pressure tank, it is coil pipe distribution that anti-icing fluid conveying pipe is positioned at the pipeline within autoclave, and electromagnetic valve is positioned on anti-icing fluid conveying pipe,
Filling solid ammonia storage material in autoclave, loading is the 40% of tank body volume capacity, and autoclave has air filter, charging
Mouth, pressure transducer, standby pipe valve, autoclave temperature sensor, wherein air filter is positioned at the outlet side of autoclave, pressure
The induction end of tank temperature sensor is inserted in solid ammonia storage material, and the induction end of pressure transducer is positioned at autoclave but does not contacts
Solid ammonia storage material, air filter is connected with reducing agent conduit by reducing gas conveying pipe, and reducing agent catheter nozzle inserts
Tail gas enters in pipe pipeline, proportional valve, gas transfer pump on reducing gas conveying pipe pipeline, after tail gas enters pipe connection SCR
Processor inlet end, SCR postprocessor outlet side connects exhaust emission tube, and gas inlet temperature sensor, NOX sensor connect
Entering on pipe at tail gas, its induction end is positioned at tail gas and enters pipe pipeline.
The thickness of described autoclave tank body is 4 ~ 5mm, cylindrical, one layer of nylon heat-insulation layer of tank interior thermal spraying.
The preparation of described solid ammonia storage material is as follows with fill method: use the anhydrous magnesium chloride of industry by weight
58 parts, expanded graphite 2 parts, deionized water 15 parts, industrial alcohol 10 parts and industry ball clay 15 parts, above-mentioned material uses machinery
Dough mixing machine mixes the powder uniformly becoming hygrometric state, incorporation time 5 ~ 15min, and mixture is filled into by the charge door on autoclave
In autoclave, using the method for machinery concussion to shake this pressure tank body 5 ~ 10min, remove the air gap therein, feeding quantity causes
The 40% of tank body volume capacity；Whole tank body is put in vacuum drying oven, begins to warm up from room temperature 25 DEG C under normal pressure, average 5 DEG C/
10min, is warmed up to 70 DEG C, and charge door opens wide discharges water vapour and alcohol steam, and 70 DEG C keep 30min, the most at this temperature
Start vacuum pump, progressively evacuation, make vacuum reach 550mbar, heat-insulation pressure keeping 30min in three times.
Described anhydrous magnesium chloride can also use other can be formed the inorganic salt of complex substitute, can be strontium chloride,
The energy such as Nickel dichloride., copper chloride or calcium chloride and NH3 form the chloride of complex.
The positive effect of the present invention is after system completes an ammoniated, uses the time long, has sufficient practicality, economy
Property and advance；This technology applies the meaning with reality on vehicle-mounted SCR.
Accompanying drawing explanation
Fig. 1 is the accompanying drawing of the present invention.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings: controls as it is shown in figure 1, a kind of for post processing
The preparation of the solid ammonia storage material of unit and fill method, by electromotor 1, anti-icing fluid conveying pipe 2, electromagnetic valve 3, autoclave 4, consolidate
Body ammonia-storing material 5, air filter 6, charge door 7, pressure transducer 8, standby pipe valve 9, autoclave temperature sensor 10, reduction
Air shooter 11, electronic control unit 12, proportioning valve 13, gas inlet temperature sensor 14, NOX sensor 15, reducing agent
Conduit 16, tail gas entrance pipe 17, exhaust emission tube 18, SCR postprocessor 19, gas transfer pump 20 form, it is characterised in that: electricity
Sub-control unit 12 connects electromagnetic valve 3, gas transfer pump 20, proportioning valve 13, gas inlet temperature sensor by signal wire harness
14, NOX sensor 15, pressure transducer 8, autoclave temperature sensor 10 connect the letter of electronic control unit 12 by holding wire
Number input, anti-icing fluid conveying pipe 2 and electromotor 1 anti-icing fluid Cascade System or in parallel, anti-icing fluid conveying pipe 2 passes autoclave 4
Inside, it is coil pipe distribution that anti-icing fluid conveying pipe 2 is positioned at the pipeline within autoclave 4, and electromagnetic valve 3 is positioned on anti-icing fluid conveying pipe 2,
Filling solid ammonia storage material 5 in autoclave 4, loading is the 40% of tank body volume capacity, autoclave 4 has air filter 6,
Charge door 7, pressure transducer 8, standby pipe valve 9, autoclave temperature sensor 10, wherein air filter 6 is positioned at autoclave 4
Outlet side, in the induction end insertion solid ammonia storage material 5 of autoclave temperature sensor 10, the induction end of pressure transducer 8 is positioned at
Autoclave 4 is interior but does not contact solid ammonia storage material 5, and air filter 6 is by reducing gas conveying pipe 11 and reducing agent conduit 16
Connecting, reducing agent conduit 16 nozzle inserts tail gas and enters in pipe 17 pipeline, proportional valve 13 on reducing gas conveying pipe 11 pipeline,
Gas transfer pump 20, tail gas enters pipe 17 and connects SCR postprocessor 19 inlet end, and SCR postprocessor 19 outlet side connects tail gas
Discharge pipe 18, gas inlet temperature sensor 14, NOX sensor 15 be connected to tail gas and enter on pipe 17, and its induction end is positioned at tail
Gas enters in pipe 17 pipeline.
The thickness of described autoclave 4 tank body is 4 ~ 5mm, cylindrical, one layer of nylon heat-insulation layer of tank interior thermal spraying.
The preparation of described solid ammonia storage material 5 is as follows with fill method: use the anhydrous chlorination of industry by weight
58 parts of magnesium, expanded graphite 2 parts, deionized water 15 parts, industrial alcohol 10 parts and industry ball clay 15 parts, above-mentioned material uses machinery
Dough mixing machine mix the powder uniformly becoming hygrometric state, incorporation time 5 ~ 15min, mixture is filled out by the charge door 7 on autoclave 4
It is charged in autoclave 4, uses the method for machinery concussion to shake this pressure tank body 5 ~ 10min, remove the air gap therein, charging
Amount causes the 40% of tank body volume capacity；Whole tank body is put in vacuum drying oven, begins to warm up from room temperature 25 DEG C, average 5 under normal pressure
DEG C/10min, and it being warmed up to 70 DEG C, charge door 7 opens wide discharges water vapour and alcohol steam, and 70 DEG C keep 30min, then temperature at this
Start vacuum pump under degree, progressively evacuation, make vacuum reach 550mbar, heat-insulation pressure keeping 30min in three times；
Described anhydrous magnesium chloride can also use other can be formed the inorganic salt of complex substitute, can be strontium chloride,
The energy such as Nickel dichloride., copper chloride or calcium chloride and NH3 form the chloride of complex；
Embodiment 1
First the SUS304 plate selecting thickness to be 4mm is welded into internal diameter is 300mm, and height is the stainless steel cask of 330mm, suitable
Sequence completes the welding of coolant circulation line and coil pipe, completes the welding of bottom, and the inner surface heat spraying nylon powder of bucket once, is noted
Meaning heating coil does not spray nylon；Complete the welding of upper enclosure, and on upper enclosure, complete charge door 7, pressure transducer
8, standby pipe valve 9, temperature sensor 10, reducing gas conveying pipe 11 and filter 6, complete the company of autoclave 4 relevant portion
Connect；Suppress leak test, it is ensured that seal and welding quality meets requirement；
Use the anhydrous magnesium chloride 58 parts of industry, expanded graphite 2 parts, deionized water 15 parts, industrial alcohol 10 parts and industry
Ball clay 15 parts, above-mentioned material uses the dough mixing machine of machinery to mix the powder uniformly becoming hygrometric state, incorporation time 5min, mixture
Be filled in autoclave 4 by the charge door 7 on autoclave 4, use the method for machinery concussion shake this pressure tank body 5 ~
10min, removes the air gap therein, and feeding quantity causes the 40% of tank body volume capacity；Whole tank body is put in vacuum drying oven, often
Pressure begins to warm up from room temperature 25 DEG C, and average 5 DEG C/10min is warmed up to 70 DEG C, and charge door 7 opens wide discharges water vapour and ethanol steaming
Vapour, 70 DEG C keep 30min, start vacuum pump, progressively evacuation the most at this temperature, make vacuum reach in three times
550mbar, heat-insulation pressure keeping 30min；
Use high-purity industry ammonia bottle by standby pipe valve 9, carry out ammoniated；Carry out in the environment of gravity-flow ventilation, in advance handle
Autoclave 4 is put in the tank of the sufficiently large cooling water of water yield, connects ammonia steel cylinder, by air relief valve and drying system,
Slowly carrying out ammoniated in the inlet pressure ranges of 0.1Mpa, the ammoniated time is 3h；Weigh before and after carrying out ammoniated the included guarantor of 4-
The autoclave of temperature layer, confirms that the clean quality of the ammonia being filled with is more than 8kg；After completing ammoniated, the valve closing of whole system, it is ensured that no
Reveal；
Connect relevant electronic control unit 12, proportioning valve 13, NOX sensor 15, reducing agent conduit 16, gas inlet
17, tail gas outlet 18, SCR postprocessor 19 and gas transfer pump 20；And with state 4 threst stand of a 8.6L
It is connected, starts said system, according to setting, start 20-gas transfer pump while motivation operating, it is achieved from ' zero-time '
Start to carry ammonia, set the quantity delivered of ammonia as the 90% of theory demands amount, start test, test engine under 6 operating modes
NOx conversion, in NH_3 leakage amount less than in the case of 15ppm, in the range of NOx conversion maintains 70 ~ 92%；Electromotor is transported
After turning 8min, the temperature of 10-temperature sensor is more than 60 DEG C, and 20-gas transfer pump quits work, and now, relies on the remaining of system
Heat realizes for ammonia, sets the quantity delivered of ammonia equally as the 90% of theory demands amount, starts test, test under 6 operating modes
The NOx conversion of motivation, in the case of NH_3 leakage amount is less than 10ppm, in the range of NOx conversion maintains 63 ~ 80%；
Said system is assembled on the chassis of a heavy duty diesel trucks, and gas transfer pump 20 commences work without delay, when
After vehicle travels 13min, gas transfer pump 20 quits work, the MAP of DS NOx Est with this type properly functioning according to vehicle,
Setting the quantity delivered of ammonia as the 80% of theory demands amount, when 15000km, this system still has ammonia supply, and real vehicle measures fully loaded work
NOX result under condition, in the range of 44 ~ 66%, meets design requirement；
Gas transfer pump 20 is controlled open or stop by electronic control unit 12, starts this vacuum pump, vacuum 550mbar,
Under the conditions of this, now adsorb the ammonia in active material and will parse automatically, before being transported to SCR postprocessor
End；When the temperature of 10-temperature sensor is less than 60 DEG C, this pump startup, quit work during more than 60 DEG C, because coolant is remaining
Heat can meet the heating requirements of active material；Anti-icing fluid conveying pipe 2 flows through the anti-icing fluid of the autoclave 4 of included heat-insulation layer
The amount signal that fed back to electronic control unit 12 by autoclave temperature sensor 10 control, when temperature closes ammonia more than 90 DEG C
Resolution speed reach maximum, in tank produce excess of ammonia cannot consume, now by the signal of electronic control unit
Close electromagnetic valve 3, stop the flowing of engine coolant, prevent continuing with of heat；During additionally, stop, SCR post processing
Device 19 quits work, it is no longer necessary to ammonia, is the most also to close electromagnetic valve 3 by the signal of electronic control unit 12, stops sending out
The flowing of motivation coolant, prevents continuing with of heat；It addition, when the pressure overpressure sensor 8 in autoclave 4 tank body
Pressure limiting 0.8Mpa time, be also to close electromagnetic valve 3 by the signal of electronic control unit 12, stop the stream of engine coolant
Dynamic, prevent continuing with of heat；
Ammonia Way out on autoclave 4 tank body top is mounted with air filter 6, it is ensured that the inorganic powder in tank body is not
Pipe-line system can be entered and block accurate device；Tank body tightens charge door 7 after adding active material；Pressure transducer 8 is also
One automatic pressure limiting valve, it is ensured that the releasing pressure automatically of overpressure system；Tank body completes standby pipe valve 9, temperature sensor are installed
10 and the reducing gas conveying pipe 11 that connected by air filter 6；
Active gases be passed through and completing of adsorbing is carried out by standby pipe valve 9；High-purity industry ammonia bottle can be used,
In the environment of gravity-flow ventilation, it is contemplated that the absorption of ammonia is exothermic process, the heat of system is removed timely and is to ensure that ammonia is fast
The key of speed absorption, therefore, puts into stainless for included heat-insulation layer autoclave 4 in a sufficiently large tank of the water yield in advance,
Connect ammonia steel cylinder, by air relief valve and drying system, in the inlet pressure ranges of 0.02 ~ 0.2Mpa, slowly carry out ammoniated,
The ammoniated time is 2 ~ 3h；Weigh before and after carrying out ammoniated the autoclave 4 of included heat-insulation layer, confirm that the clean quality of the ammonia being filled with is in advance
In the range of Ding；After completing ammoniated, the valve closing of whole system, it is ensured that do not reveal；
Autoclave 4 installation site onboard is in the side of vehicle with SCR postprocessor 19, in order to reduce the length of pipeline
Degree, reduces the time of system response, increases system response sensitivity；
When row's temperature or the NOx level of electromotor reach certain level, and electronic control unit 12 controls the aperture of proportioning valve 13,
Realize the ammonia conveying change to SCR postprocessor 19, meet the demand to NOX removing under vehicle difference operating mode.
Claims (2)
1. the preparation for the solid storage ammonia mast of aftertreatment control unit and fill method, it is characterised in that: solid storage ammonia
Material uses the anhydrous magnesium chloride 58 parts of industry, expanded graphite 2 parts, deionized water 15 parts, industrial alcohol 10 parts and industry ball to glue
15 parts of soil, above-mentioned material uses the dough mixing machine of machinery to mix the powder uniformly becoming hygrometric state, incorporation time 5 ~ 15min, mixture
It is filled in autoclave by the charge door on autoclave, uses the method for machinery concussion to shake this pressure tank body 5 ~ 10min, go
Except the air gap therein, feeding quantity causes the 40% of tank body volume capacity；Whole tank body is put in vacuum drying oven, from room under normal pressure
Temperature 25 DEG C begins to warm up, and average 5 DEG C/10min is warmed up to 70 DEG C, and charge door opens wide discharges water vapour and alcohol steam, 70 DEG C of guarantors
Holding 30min, start vacuum pump, progressively evacuation the most at this temperature, make vacuum reach 550mbar in three times, insulation is protected
Pressure 30min.
A kind of solid for aftertreatment control unit the most according to claim 1 stores up preparation and the fill method of ammonia mast,
It is characterized in that described anhydrous magnesium chloride uses to substitute with the chloride of NH3 formation complex.
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| CN201210220179.2A CN102733912B (en) | 2012-06-29 | 2012-06-29 | The preparation of a kind of solid ammonia storage material for aftertreatment control unit and fill method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102953787B (en) * | 2012-11-28 | 2015-04-01 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Dual-pump type reducer jetting and supplying device |
| CN104121076A (en) * | 2014-08-11 | 2014-10-29 | 吉林省众鑫汽车装备有限公司 | Solid ammonia storage device |
| CN113006904B (en) * | 2021-02-24 | 2022-01-28 | 合肥工业大学 | Solid urea ammonia supply device for vehicle |
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| CN101344026A (en) * | 2008-08-21 | 2009-01-14 | 上海交通大学 | System for low temperature plasma pre-oxidizing NOx of auxiliary NH3-SCR fine purification diesel engine |
| CN202673418U (en) * | 2012-06-29 | 2013-01-16 | 中国第一汽车股份有限公司 | Pump assisted system for storing and supplying ammonia by one-stage waste heat mode |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001234734A (en) * | 2000-02-23 | 2001-08-31 | Meidensha Corp | NOx REMOVAL SYSTEM |
| EP1778586B1 (en) * | 2004-08-03 | 2017-04-05 | Amminex Emissions Technology A/S | A solid ammonia storage and delivery material |
| CN101454064A (en) * | 2006-02-27 | 2009-06-10 | 氨合物股份公司 | A method of storing and delivering ammonia and the use of electromagnetic radiation for desorption of ammonia from a chemical complex |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101344026A (en) * | 2008-08-21 | 2009-01-14 | 上海交通大学 | System for low temperature plasma pre-oxidizing NOx of auxiliary NH3-SCR fine purification diesel engine |
| CN202673418U (en) * | 2012-06-29 | 2013-01-16 | 中国第一汽车股份有限公司 | Pump assisted system for storing and supplying ammonia by one-stage waste heat mode |
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