CN102720575B - The aftertreatment control unit of single-stage waste heat storing and supplying ammonia - Google Patents
The aftertreatment control unit of single-stage waste heat storing and supplying ammonia Download PDFInfo
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- CN102720575B CN102720575B CN201210220159.5A CN201210220159A CN102720575B CN 102720575 B CN102720575 B CN 102720575B CN 201210220159 A CN201210220159 A CN 201210220159A CN 102720575 B CN102720575 B CN 102720575B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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Abstract
The present invention relates to a kind of aftertreatment control unit of single-stage waste heat storing and supplying ammonia, it is characterised in that：Electronic control unit signal output part passes through signal wire and magnetic valve, proportioning valve is connected, pressure sensor, autoclave temperature sensor, gas inlet temperature sensor, NOX sensor is connected with electronic control unit signal input part, anti-icing fluid delivery pipe is located at autoclave interior section and coil pipe distribution is presented, filled solid ammonia-storing material in autoclave, in autoclave temperature sensor senses end insertion solid ammonia storage material, pressure sensor induction end is located in autoclave but not contacted with solid ammonia storage material, air cleaner is connected by reducing gas delivery pipe with reducing agent conduit, reducing agent catheter nozzle end probes into tail gas and entered in pipe pipe, proportioning valve is located on reducing gas delivery pipe pipeline, gas inlet temperature sensor, the induction end of NOX sensor probes into tail gas and entered in pipe pipeline, tail gas enters pipe and connects SCR postprocessor inlet end, SCR postprocessor outlet side connects exhaust emission tube；Which employs the composition of active material, porous material and binding agent composition is as storage ammonia and puts the carrier of ammonia；The efficiency of charge and discharge ammonia is improved, simplifies system, reliability is improved, cost is also significantly reduced, the obstacle of large-scale industry popularization and application is eliminated.
Description
Technical field
The present invention relates to a kind of aftertreatment control unit of single-stage waste heat storing and supplying ammonia, applied to vehicle exhaust
SCR post-processes industry, is also applied for the FCEV energy-storage systems of fuel cell.
Background technology
Currently, the whole world faces the integration challenges of the energy and environment.In the technological means selection of the emission compliance of orthodox car
Aspect, people still suffer from many problems, for example, how to select post processing technical approach in terms of.
SCR (Selective Catalytic Reduction) catalyzed conversion reduction technique is traditional post processing skill
Art.The essence of traditional SCR technology of this use liquid area is to decomposite ammonia at high temperature using urea, is used as reducing agent
Ammonia and engine exhaust in NOX reacted under the comprehensive function of catalyst and temperature, generated under preferable operating mode nontoxic
N2And H2O, so as to reach the purpose of purification.
Traditional SCR has lot of advantages, for example, can have 50 ~ 85% in the range of 250 ~ 550oC of delivery temperature
NOX removal efficiency, and can effectively reduce PM emission level；Traditional SCR can easily meet Europe 4 and the level of Europe 5, it may have
Reach the potentiality of the level of Europe 6；Traditional SCR technology that Europe 4 is used is reached at present, and the fuel oil consumption of engine can reduce by 3 ~ 6%；Pass
The SCR catalyst of system does not contain noble metal, compares advantage of lower cost；Traditional SCR contains to the quality of fuel oil for vehicles, particularly sulphur
Amount is insensitive.Analyzed based on more than, traditional SCR post-processing technologies are also relatively adapted to the vehicle condition and fuel oil for vehicles shape of China
Condition.
If in the traditional vehicle-mounted SCR post-processing technology of Chinese popularization and application, it is necessary to solve good vector, catalyst, urea
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
The standard of state 4 of state repeatedly postpones the timetable of implementation, not exclusively the nonsynchronous sole cause of standard of fuel, also faces complexity
The problem of service facility of the carbamide reducing agent socialization of social matching system and liquid is built, for example, after the standard of state 4 is implemented,
ECU needed for being operated immediately to traditional SCR system（Control unit）And DCU（Metering units）Generation demand, it is contemplated that mesh
The electric-control systems such as preceding vehicle-mounted ECU are all imported products, and the DCU of domestic enterprise's independent development is difficult progress communication matching therewith,
, whereas if the use import product of ECU and DCU system 100%, not only price is very high, and user is difficult to receive, and there is goods
The problem of source is at full stretch, the problem of being also faced with the after-sale service technology and cost of complexity, constrains the hair of whole automobile industry
Exhibition and progress.In addition, the liquid area reducing agent used in traditional SCR system faces the problem of freezed in winter and insulation defrosting,
The reason for this also result in complicated traditional SCR system and poor stability.
Therefore, how to obtain inexpensive and high performance after-treatment system is in the core for promote the art progress
Hold.Inorganic salts to ammonia adsorption-desorption characteristics can as following SCR system the good choice of technology.
Some salts of technical grade, for example, the chloride such as strontium chloride, magnesium chloride or calcium chloride and their mixture,
The system used cooperatively with ammonia, i.e., above-mentioned chloride and heat absorption and the exothermic phenomenon of the adsorption-desorption process of ammonia are ripe
Be applied to industry large cold storage refrigeration system.
Above-mentioned anhydrous chloride and ammonia carry out the chlorination that chemisorbed is the general principles of chemistry, in theory a molecule
Thing can adsorb the ammonia of 6 ~ 8 molecules, form stable complex compound, and ammonia is deviate from during heating, with going deep into for research, Ren Menfa
Existing, the adsorption-desorption model and the principles of chemistry of these chlorides and ammonia can be completely applied to the SCR systems of motor vehicle tail-gas purifying
System.
In national patent Information Network, it is the theme word and search, a kind of Patent No. CN201120099229.7 ' gas with storing up ammonia
Phase method methenamine tail gas ammonia recovery unit ', Patent No. CN201020677361.7 ' be used for machine room of refrigerated warehouse with ammonia connection
Mechanism ' and Patent No. CN201020269811.9 ' composite functional ammonia storage device ' be not related to feature in the present invention into
Point.The patent of Patent No. CN200520057558.X ' a kind of ammonia steaming device ' is a kind of to ammonia nitrogen industrial wastewater progress ammonia nitrogen
The environment protection treating device of processing is got rid of, the characteristic component in the present invention is not related to yet.It is uncorrelated with the present invention.
Number of patent application for CN201010244091.5 ' be used for the method tested to the work of SCR catalyst with
System ' and 2 of ' operation method and diagnostic method of SCR exhaust after-treatment system ' of Patent No. CN200880104697.X
Invention provides a kind of for SCR（SCR）Catalytic converter and the ureaclastic ammonia dispensing module of traditional liquid
And control system, it is not involved with the characteristic component of the present invention.
Number of patent application is a kind of invention of CN200910197860.8 ' preparation method of efficient low-temperature ammonia-storing material '
It is characterized in use amino borane ammino-complex ammonia BH3 (NH3) n (n=1 ~ 3) applied to SCR aftertreatment system；Room temperature maximum storage
Ammonia amount is up to 62.4wt%, still, it is contemplated that amino borane it is expensive, with higher blast and burning grade, be not suitable for
The high-volume popularization and application in general industry field.
Number of patent application is related to storage for the invention of CN200580026626.9 ' solid material of storage and delivering ammonia '
With the solid material of delivering ammonia.The solid material of the storage ammonia includes Ma(NH3)nXzIonic salt, salt solid material is passed through mould
Have direct voltage shaping, for example, cylinder is made, it is then that many this cylinders are arranged together.The patent is most
Have the disadvantage that cylinder is excessively closely knit greatly, each ammonolysis carries out ammonia again saturation absorption after the completion of inhaling takes long enough, example
Such as 4 ~ 6 hours, efficiency was very low, and this is very inconvenient for the SCR storage ammonia systems applied on automobile, should as it is limited
The reason for using.
Number of patent application is CN200580009219.7 ' purposes of the ammonia storage device in energy production ', and the invention is related to
A kind of generator unit, is M comprising formulaa(NH3) nXzAmmonia absorb with release salt, the patent is mainly primarily adapted for use in fuel cell
System.Property material is refer in the claim 4 of the patent for such salt or on porous carrier materials, it is not sound
Which kind of porous material bright be, those skilled in the art can not be implemented.
Number of patent application is the hair of CN200710156866.1 ' a kind of amido complex compound and its production and use '
It is bright to disclose a kind of amido complex compound and its production and use.The composition of the amido complex compound is MXm(NH3)n, the invention
Separation to ammonia in circulating air used in ammonia synthesis process.Claim relates merely to the preparation technology of the ammonobase complex compound
Process.
Number of patent application is solid comprising ammonia absorption/desorption for the patent of CN200680005886.2 ' the high density storage of ammonia '
Body material solid ammonia storage and conveying material, it is described be compacted to density more than theoretic skeleton density 50% storage and
Convey material and solid ammonia storage material is provided, the metal salt solid material described in the patent is also to be molded directly into type, statement is used
Binding agent, only to state be probably to employ silicon dioxide fibre binding agent, also not dosage ratio, without specifically
The thin item of bright other used compositions, professional and technical personnel can not almost implement.
The retrieval of above-mentioned patent and analysis shows, adsorb and parse ammonia with activity storage ammoniate, form in vehicle
The after-treatment system of upper application is also not seen reported.
The content of the invention
It is an object of the invention to provide a kind of aftertreatment control unit of single-stage waste heat storing and supplying ammonia, which employs
The composition of active material, porous material and binding agent composition is as storage ammonia and puts the carrier of ammonia；Engine coolant it is remaining
Heat is heated, by control unit and one group of magnetic valve or proportioning valve, realizes that the dosage of ammonia is conveyed and easily imported after SCR
Processing system, realizes the removal to NOX；The efficiency of charge and discharge ammonia is improved, simplifies system, reliability is improved, also significantly drops
Low cost, eliminates the obstacle of large-scale industry popularization and application.
The technical proposal of the invention is realized in this way：A kind of post processing control of single-stage waste heat storing and supplying ammonia is single
Member, is passed by engine, anti-icing fluid delivery pipe, magnetic valve, autoclave, solid ammonia storage material, air cleaner, charge door, pressure
Sensor, standby pipe valve, autoclave temperature sensor, reducing gas delivery pipe, electronic control unit, proportioning valve, gas inlet temperature
Spend sensor, NOX sensor, reducing agent conduit, tail gas and enter pipe, exhaust emission tube, SCR postprocessor composition, its feature
It is：Electronic control unit signal output part is connected by signal wire with magnetic valve, proportioning valve, pressure sensor, autoclave temperature
Degree sensor, gas inlet temperature sensor, NOX sensor are connected by signal wire with electronic control unit signal input part,
Serial or parallel connection in anti-icing fluid delivery pipe and the anti-icing fluid system of engine, anti-icing fluid delivery pipe is passed through from autoclave, anti-icing fluid
Delivery pipe is located at autoclave interior section and coil pipe distribution is presented, and magnetic valve is located on anti-icing fluid delivery pipe pipeline, filled out in autoclave
Fill the 40% of solid ammonia storage material tank body volume capacity, pressure-resistant upper end is free air filter, charge door, pressure sensor, standby
In pipe valve, autoclave temperature sensor, wherein autoclave temperature sensor senses end insertion solid ammonia storage material, pressure sensor
Induction end is located in autoclave but not contacted with solid ammonia storage material, and air cleaner passes through reducing gas delivery pipe and reducing agent
Conduit is connected, and reducing agent catheter nozzle end probes into tail gas and entered in pipe pipe, and proportioning valve is located on reducing gas delivery pipe pipeline, tail
Gas inlet temperature sensor, NOX sensor be connected to tail gas on pipe, gas inlet temperature sensor, NOX sensor
Induction end probes into tail gas and entered in pipe pipeline, and tail gas enters pipe and connects SCR postprocessor inlet end, SCR postprocessor outlet side
Connect exhaust emission tube.
Described solid ammonia storage material prepares as follows with fill method：By weight using the anhydrous magnesium chloride 58 of industry
Part, 2 parts of expanded graphite, 15 parts of deionized water, 10 parts of industrial alcohol is with industrial 15 parts of ball clay, and the dough mixing machine for passing through machinery is stirred
The uniform powder into hygrometric state, 5 ~ 15min of incorporation time is filled into autoclave by charge door, using the method for machinery concussion
Pressure-resistant 5 ~ the 10min of tank body is shaken, the air gap therein is removed, solid ammonia storage material filling causes the 40% of tank body volume capacity
；Whole tank body is put into vacuum drying oven, under normal pressure from room temperature 25 DEG C begin to warm up, average 5 DEG C/10min is warming up to 70
DEG C, charge door discharge water vapour and alcohol steam are opened wide during heating, then 70 DEG C of holding 30min start vavuum pump at 70 DEG C,
Progressively vacuumize, vacuum is reached 550mabr, heat-insulation pressure keeping 30min in three times.
Described anhydrous magnesium chloride can also be substituted using other inorganic salts that can form complex compound, can be strontium chloride,
The chloride of nickel chloride, copper chloride or calcium chloride energy and NH3 formation complex compounds.
Described autoclave is the pressure-resistant tank body of stainless steel, and the thickness of tank body is 4 ~ 5mm, cylinder, tank interior
One layer of nylon heat-insulation layer of thermal spraying.
The positive effect of the present invention is to complete once to fill after ammonia, it is ensured that the mileage of vehicle traveling for 20000 ~
40000km, improves the efficiency of charge and discharge ammonia, simplifies system, improves reliability, cost is also significantly reduced, with very high
Practicality, economy and advance.
Brief description of the drawings
Fig. 1 is the accompanying drawing of the present invention.
Embodiment
Below by accompanying drawing, the invention will be further described with embodiment：As shown in figure 1, a kind of single-stage waste heat storage
Ammonia supply ammonia aftertreatment control unit, by engine 1, anti-icing fluid delivery pipe 2, magnetic valve 3, autoclave 4, solid ammonia storage material 5,
Air cleaner 6, charge door 7, pressure sensor 8, standby pipe valve 9, autoclave temperature sensor 10, reducing gas delivery pipe
11st, electronic control unit 12, proportioning valve 13, gas inlet temperature sensor 14, NOX sensor 15, reducing agent conduit 16, tail
Gas enters pipe 17, exhaust emission tube 18, SCR postprocessor 19 and constituted, it is characterised in that：The signal output of electronic control unit 12
End is connected by signal wire with magnetic valve 3, proportioning valve 13, pressure sensor 8, autoclave temperature sensor 10, gas inlet temperature
Degree sensor 14, NOX sensor 15 are connected by signal wire with the signal input part of electronic control unit 12, anti-icing fluid delivery pipe 2
With serial or parallel connection in the anti-icing fluid system of engine 1, anti-icing fluid delivery pipe 2 is passed through from autoclave 4, anti-icing fluid delivery pipe 2
Coil pipe distribution is presented in the interior section of autoclave 4, magnetic valve 3 is located on the pipeline of anti-icing fluid delivery pipe 2, and filling is solid in autoclave 4
The 40% of the tank body volume capacity of body ammonia-storing material 5, there is air cleaner 6 on the top of autoclave 4, charge door 7, pressure sensor 8, standby
With pipe valve 9, autoclave temperature sensor 10, wherein in the induction end of autoclave temperature sensor 10 insertion solid ammonia storage material 5, pressure
The induction end of force snesor 8 is located in autoclave 4 but not contacted with solid ammonia storage material 5, and air cleaner 6 is defeated by reducing gas
Pipe 11 is sent to be connected with reducing agent conduit 16, the nozzle end of reducing agent conduit 16 is probeed into tail gas managed into pipe 17, and proportioning valve 13 is located at
On the pipeline of reducing gas delivery pipe 11, gas inlet temperature sensor 14, NOX sensor 15 are connected to tail gas and entered on pipe 17,
Gas inlet temperature sensor 14, the induction end of NOX sensor 15 probe into tail gas and entered in the pipeline of pipe 17, and tail gas enters pipe 17
Connect the inlet end of SCR postprocessor 19, the outlet side of SCR postprocessor 19 connection exhaust emission tube 18.
Described solid ammonia storage material 5 prepares as follows with fill method：By weight using the anhydrous magnesium chloride of industry
58 parts, 2 parts of expanded graphite, 15 parts of deionized water, 10 parts of industrial alcohol and industrial 15 parts of ball clay are supported by the arm by the dough mixing machine of machinery
Turn into the powder of hygrometric state with uniform, 5 ~ 15min of incorporation time is filled into autoclave 4 by charge door 7, using machinery concussion
Method shake the pressure-resistant 5 ~ 10min of tank body, remove the air gap therein, solid ammonia storage material 5, which is filled to tank body volume, to be held
The 40% of amount；Whole tank body is put into vacuum drying oven, under normal pressure from room temperature 25 DEG C begin to warm up, average 5 DEG C/10min rises
Temperature opens wide the discharge water vapour of charge door 7 and alcohol steam to 70 DEG C, during heating, and then 70 DEG C of holding 30min start at 70 DEG C
Vavuum pump, is progressively vacuumized, and vacuum is reached 550mabr, heat-insulation pressure keeping 30min in three times；
Described anhydrous magnesium chloride can also be substituted using other inorganic salts that can form complex compound, such as strontium chloride, chlorine
Change the chloride of the energy such as nickel, copper chloride or calcium chloride and NH3 formation complex compounds.
Described autoclave is the pressure-resistant tank body of stainless steel, and the thickness of tank body is 4 ~ 5mm, cylinder, tank interior
One layer of nylon heat-insulation layer of thermal spraying.
Embodiment 1
It is 300mm that the SUS304 plates that selection thickness is 4mm are welded into internal diameter first, highly the stainless steel cask for 330mm, suitable
Sequence completes the welding of coolant circulation line and coil pipe, completes the welding of bottom, and the inwall thermal spraying nylon powder of bucket once, is noted
Meaning heating coil does not spray nylon；Complete the welding of upper enclosure, and completion charge door 7, pressure sensor on upper enclosure
8th, standby pipe valve 9, autoclave temperature sensor 10, reducing gas delivery pipe 11 and filter 6, complete the dependent part of autoclave 4
The connection divided；Suppress leak test, it is ensured that sealing and welding quality, which are met, to be required；
By weight using 58 parts of the anhydrous magnesium chloride of industry, 2 parts of expanded graphite, 15 parts of deionized water, industrial alcohol
10 parts and industrial 15 parts of ball clay, prepare mixture 10kg；The uniform powder as hygrometric state is mixed using the dough mixing machine of machinery, mixed
Conjunction time 10min, is progressively filled into autoclave 4 by charge door 7, during which shakes the autoclave using the method for machinery concussion
5 ~ 10min of body；Whole tank body is put into vacuum drying oven, under normal pressure from room temperature 25 DEG C begin to warm up, average 5 DEG C/10min rises
Temperature is to 70 DEG C, and charge door 7 is unlimited during heat drying；30min is kept at a temperature of this, then starts vacuum at this temperature
Pump, is progressively vacuumized, and vacuum is reached 550mabr, heat-insulation pressure keeping 30min in three times；Complete the making of solid ammonia storage material 5
And filling.
The autoclave 4 that solid ammonia storage material 5 is installed additional is completed, by standby pipe valve 9 using high-purity industrial ammonia bottle, is filled
Ammonia；Carry out, autoclave 4 is put into the tank of a sufficiently large cooling water of water in the environment of gravity-flow ventilation in advance, even
Ammonia steel cylinder is connect, by pressure-reducing valve and drying system, carries out filling ammonia slowly in 0.1Mpa inlet pressure ranges, fills the ammonia time
For 3h；Carrying out filling before and after ammonia autoclave 4 of weighing, confirming that the net quality for the ammonia being filled with is more than 8kg；Completion is filled after ammonia, whole system
The valve of system is closed, it is ensured that do not revealed；
Then electronic control unit 12, proportioning valve 13, NOX sensor 15, reducing agent conduit 16, the tail gas for connecting correlation enter
Mouth 17, tail gas outlet 18, SCR postprocessor 19；And be connected with the 8.6L threst stand of state 4, coolant
Pipe is parallel to cooling system, starts after said system, engine operating 5min, system pressure is shown as 0.15Mpa, starts system
System, sets the quantity delivered of ammonia as the 90% of theory demands amount, starts test, the NOX conversion of test engine under 6 operating modes
Rate, in the case where NH_3 leakage amount is less than 10ppm, NOx conversion is maintained in the range of 61 ~ 87%.
Anti-icing fluid delivery pipe 2 be with the coolant of engine 1 circulate pipeline parallel way based on, can also for Light-duty Vehicle
The series system used；The heating coil of anti-icing fluid delivery pipe 2 is stainless-steel pipe, the tank body of autoclave 4 prepare during and
Tank body welding is together；The amount that anti-icing fluid delivery pipe 2 flows through the anti-icing fluid of autoclave 4 is fed back to by autoclave temperature sensor 10
The signal of electronic control unit 12 is controlled, and when temperature closing more than 90 DEG C, the resolution speed of ammonia reaches maximum, produced in tank
Raw excess of ammonia can not be consumed, and magnetic valve 3 is now closed by the signal of electronic control unit 12, stop engine cool
The flowing of liquid, prevents the continuation of heat from inputting；During parking, SCR postprocessor 19 is stopped, it is no longer necessary to ammonia, now passes through
The signal of electronic control unit 12 closes magnetic valve 3, stops the flowing of engine coolant, prevents the continuation of heat from inputting；
In addition, being also by electronic control unit when the pressure in the tank body of autoclave 4 exceedes the pressure limiting 0.8Mpa of pressure sensor 8
12 signal closes magnetic valve 3, stops the flowing of engine coolant, prevents the continuation of heat from inputting；
The ammonia Way out on the tank body top of autoclave 4 is mounted with air cleaner 6, it is ensured that the inorganic powder in tank body will not
Accurate device is blocked into pipe-line system；Tank body tightens charge door 7 after solid ammonia storage material 5 is added；Pressure sensor 8
It is an automatic pressure limiting valve, it is ensured that the releasing pressure automatically of overpressure system；
Complete that standby pipe valve 9 is installed on tank body, the completion for being passed through and adsorbing of active gases is entered by standby pipe valve 9
Capable；Can be using high-purity industrial ammonia bottle, in the environment of gravity-flow ventilation, it is contemplated that the absorption of ammonia is exothermic process, system
Heat timely remove be ensure ammonia quick adsorption key, therefore, autoclave 4 is put into a water in advance sufficiently large
In tank, ammonia steel cylinder is connected, by pressure-reducing valve and drying system, is entered slowly in 0.02 ~ 0.2Mpa inlet pressure ranges
Row fills ammonia, fills the ammonia time for 2 ~ 3h；Carrying out filling before and after ammonia autoclave 4 of weighing, confirming the net quality for the ammonia being filled with predetermined model
In enclosing；Completion is filled after ammonia, and the valve of whole system is closed, it is ensured that do not revealed；
Autoclave 4 completes to fill after ammonia, and installation site is in the side of vehicle, to reduce pipeline with SCR postprocessor 19
Length, reduce system response time, increase system response sensitivity；
When the row's temperature or NOx level of engine reach certain level, electronic control unit 12 controls opening for proportioning valve 13
Degree, realizes that the conveying of ammonia to SCR postprocessor 19 changes, and meets the demand removed under the different operating modes of vehicle to NOX.
Equally, said system is assembled on a heavy truck, normally run according to vehicle and the type DS NOx Est
MAP, set the quantity delivered of ammonia as the 80% of theory demands amount, coolant pipe is parallel to cooling system, in 17000km,
The system still has ammonia supply, and real vehicle measures full load NOx conversion result in the range of 38 ~ 53%, meets design requirement.
Claims (5)
1. a kind of aftertreatment control unit of single-stage waste heat storing and supplying ammonia, by engine, anti-icing fluid delivery pipe, magnetic valve,
Autoclave, solid ammonia storage material, air cleaner, charge door, pressure sensor, standby pipe valve, autoclave temperature sensor, also
Raw-gas delivery pipe, electronic control unit, proportioning valve, gas inlet temperature sensor, NOX sensors, reducing agent conduit, tail
Gas enters pipe, exhaust emission tube, SCR preprocessors composition, it is characterised in that：Electronic control unit signal output part passes through letter
Number line is connected with magnetic valve, proportioning valve, pressure sensor, autoclave temperature sensor, gas inlet temperature sensor, NOX
Sensor is connected by signal wire with electronic control unit signal input part, the anti-icing fluid system of anti-icing fluid delivery pipe and engine
Serial or parallel connection, anti-icing fluid delivery pipe is passed through from autoclave, and anti-icing fluid delivery pipe is located at autoclave interior section and coil pipe point is presented
Cloth, magnetic valve is located on anti-icing fluid delivery pipe pipeline, filled solid ammonia-storing material in autoclave, and solid ammonia storage material volume is resistance to
The 40% of tankage size is pressed, pressure-resistant upper end is free air filter, charge door, pressure sensor, standby pipe valve, autoclave temperature to pass
In sensor, wherein autoclave temperature sensor senses end insertion solid ammonia storage material, pressure sensor induction end is located at autoclave
Interior but do not contacted with solid ammonia storage material, air cleaner is connected by reducing gas delivery pipe with reducing agent conduit, reducing agent
Catheter nozzle end probes into tail gas and entered in pipe pipe, and proportioning valve is located on reducing gas delivery pipe pipeline, gas inlet TEMP
Device, NOX sensors are connected to tail gas and entered on pipe, and gas inlet temperature sensor, the induction end of NOX sensors probe into tail
Gas enters in pipe pipeline, and tail gas enters pipe and connects SCR preprocessor inlet ends, SCR preprocessors outlet side connection tail gas
Discharge pipe.
2. a kind of aftertreatment control unit of single-stage waste heat storing and supplying ammonia according to claim 1, its feature
It is prepared by described solid ammonia storage material as follows with fill method：By weight using the anhydrous magnesium chloride 58 of industry
Part, 2 parts of expanded graphite, 15 parts of deionized water, 10 parts of industrial alcohol and industrial 15 parts of ball clay, pass through the sum of machinery
Face machine is stirred the powder as hygrometric state, and 5 ~ 15min of incorporation time is filled into autoclave by charge door, using machinery
The method of concussion shakes the pressure-resistant 5 ~ 10min of tank body, removes the air gap therein, and solid ammonia storage material is filled to tank body
The 40% of product capacity；Whole tank body is put into vacuum drying oven, under normal pressure from room temperature 25 DEG C begin to warm up, it is average 5 DEG C/
10min, is warming up to 70 DEG C, and charge door discharge water vapour and alcohol steam are opened wide during heating, and 70 DEG C keep 30min, Ran Hou
Start vavuum pump at 70 DEG C, progressively vacuumize, vacuum is reached 550mabr, heat-insulation pressure keeping 30min in three times.
3. a kind of aftertreatment control unit of single-stage waste heat storing and supplying ammonia according to claim 2, its feature
It is that described industrial anhydrous magnesium chloride is substituted using the chloride that complex compound can be formed with NH3.
4. a kind of aftertreatment control unit of single-stage waste heat storing and supplying ammonia according to claim 3, its feature
The chloride of energy and NH3 formation complex compounds described in being includes strontium chloride, nickel chloride, copper chloride or calcium chloride.
5. a kind of aftertreatment control unit of single-stage waste heat storing and supplying ammonia according to claim 1, its feature
It is the pressure-resistant tank body of stainless steel to be described autoclave, and the thickness of tank body is 4 ~ 5mm, cylinder, tank interior thermal jet
Apply one layer of nylon heat-insulation layer.
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| CN201210220159.5A CN102720575B (en) | 2012-06-29 | 2012-06-29 | The aftertreatment control unit of single-stage waste heat storing and supplying ammonia |
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| CN201210220159.5A CN102720575B (en) | 2012-06-29 | 2012-06-29 | The aftertreatment control unit of single-stage waste heat storing and supplying ammonia |
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| CN102720575B true CN102720575B (en) | 2017-09-29 |
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| CN103408035B (en) * | 2013-07-30 | 2015-04-22 | 中国第一汽车股份有限公司 | Automatic pressure balancing device for solid ammonia storing material system |
| 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 |
| CN107355284B (en) * | 2017-06-27 | 2019-09-03 | 中国第一汽车股份有限公司 | The solid ammonia ammonia Automatic Provisioning System of engine exhaust heat heating method |
| CN108301939B (en) * | 2018-03-28 | 2023-09-01 | 东风商用车有限公司 | Ammonia storage and metering injection system by using engine exhaust and cooling water for heating |
| CN108487975B (en) * | 2018-03-28 | 2023-09-01 | 东风商用车有限公司 | Ammonia storage and ammonia metering injection system with electric heating and engine waste heat heating functions |
| CN111569804B (en) * | 2020-04-19 | 2021-09-28 | 山东三润助剂科技股份有限公司 | Acrylic ester polymer emulsion synthesis device and use method thereof |
| CN113685250B (en) * | 2021-08-24 | 2022-09-23 | 一汽解放汽车有限公司 | Engine exhaust aftertreatment system, method, vehicle and storage medium |
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| JP3027057B2 (en) * | 1992-11-09 | 2000-03-27 | アイシン精機株式会社 | In-vehicle hydrogen supply device |
| CN1165098A (en) * | 1997-02-18 | 1997-11-19 | 奉政一 | Refrigeration air conditioner without compressor for can (ship) use and allocation method |
| CN201891478U (en) * | 2010-12-02 | 2011-07-06 | 中国重汽集团济南动力有限公司 | Device for heating urea tank and pipeline of selective catalytic reduction (SCR) system by engine exhaust |
| CN102162390B (en) * | 2011-05-04 | 2013-02-27 | 北京航空航天大学 | Selective catalytic reduction system with multiple quantitative accurate injection function |
| CN202832726U (en) * | 2012-06-29 | 2013-03-27 | 中国第一汽车股份有限公司 | System using single-stage waste heat method to store ammonia and supply ammonia |
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