CN105518264A - Pollution Removal System for Removing Pollution by Selective Catalytic Reduction - Google Patents
Pollution Removal System for Removing Pollution by Selective Catalytic Reduction Download PDFInfo
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- CN105518264A CN105518264A CN201480016354.3A CN201480016354A CN105518264A CN 105518264 A CN105518264 A CN 105518264A CN 201480016354 A CN201480016354 A CN 201480016354A CN 105518264 A CN105518264 A CN 105518264A
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- Prior art keywords
- ammonia
- housing
- wall
- catcher
- pollution
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—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]
-
- 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
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1406—Storage means for substances, e.g. tanks or reservoirs
-
- 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
- F01N2610/1433—Pumps
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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
-
- 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 invention relates to a housing (10) for an ammonia-sensitive component (9) in a pollution removal system for removing pollution by selective catalytic reduction. The housing comprises, on the one hand, walls (17) and, on the other hand, a trap configured to trap ammonia emanating from the walls or ammonia that may be emitted from the at least one wall if not already trapped.
Description
Technical field
The present invention relates to the trapping for the ammonia in the pollution removal system of the amount of nitrogen oxides in reduce engine motor-car exhausting air.
Background technique
The nitrogen oxide be present in the exhausting air of vehicle, particularly diesel vehicle can be removed system by the pollution of use selective catalytic reduction (English is " SelectiveCatalyticReduction ", is abbreviated as SCR) technology and eliminate.According to this technology, quantitative ammonia (NH
3) be injected in the takeoff line of catalyst converter upstream, reduction reaction occurs on this catalyst converter.
At present, ammonia is produced by the pyrolysis of predecessor (being generally aqueous solution of urea).In vehicle-mounted urea storage system, along with time history, urea liquid stands the reaction of resolving into ammonia, and this reaction strengthens when temperature rises.In some cases, by this decomposition generate and the ammonia being present in storage tank inside can store the wall of storage tank through urea.Thus, there is this ammonia and be dispersed into risk in storage tank outside, i.e. storage tank ambient air.This is particularly troublesome.
In fact, ammonia is the odor sources that excitant is very large, and for environment, be especially poisonous for the mankind.In addition, ammonia also has corrosivity to some metals.
Therefore, need trapping initiatively or unexpected produce and the ammonia steam of storage tank may be left.
The equipment of the ammonia that storage tank inside produces is stored by the known a kind of urea polluting removal system for being captured in SCR of file EP1911508.
The solution described in this document is to guide the ammonia being present in urea storage storage tank inside into catcher that urea stores storage tank outside by means of delivering pipe.But the defect of this solution is to there is such risk, and the part being namely present in the ammonia in storage tank is not drawn towards catcher.Therefore this part ammonia may through the wall of storage tank.
In addition, also there is the risk that ammonia leaks at transmission pipeline place.But foregoing solutions is unsuitable for solving this problem.More generally, the solution of above-mentioned prior art can not trap the ammonia that may leak from the SCR system parts (such as urea injection line) except storage tank.The solution of prior art do not allow to protect yet be placed in its wall and can be made up of the material of permeable ammonia housing (
) in SCR system parts, the motor of such as urea pump, the copper serpentine coil that is more often called as coil.
Summary of the invention
The present invention is intended to trouble part may to be caused to trap SCR at all ammonias and pollutes all or part of of ammonia removed internal system and produce.
For this reason, theme of the present invention is a kind of subtense angle being removed the pollution removal system of pollution by selective catalytic reduction, described pollution removal system is used for the amount of nitrogen oxide in reduce engine motor-car exhausting air, and the feature of this subtense angle is that described subtense angle comprises:
-at least one room, this room comprises at least one wall; With
-catcher, this catcher is configured to catch ammonia that (capter) give out from this at least one wall or as being not yet captured, the ammonia that may will give out from this at least one wall.
The subtense angle of system " pollute removal " refers to by the subset forming set that pollute removal system, that form for all elements be loaded in vehicle.
" room " refers to the volume limited by least one wall.Thus, when the inside of the first volume limited by first wall limits the second volume by the second wall, two rooms are defined.A room is corresponding to the space between two walls.Second Room corresponds to the second volume limited by the second wall.
" wall " refers to (at least partly or fully) stops the structure of ammonia.Or rather, for the thickness of 1mm, this structure has and is less than 3g/m every day
2ammonia permeability.
Alternatively, catcher is integrated in wall.
In the present invention, subtense angle forms monomer module, can optimize the total volume occupied by room and catcher like this.The configuration of this monomer module also helps room and catcher is polluting the installation in removal system.
In the first modification, room comprises the catcher being configured to catch ammonia, and comprises the assembly to ammonia sensitivity.
Preferably, the assembly of ammonia sensitivity is made up of copper or its alloy, and preferably forms the serpentine coil of the motor of urea pump.
Ammonia is by corrosive attack copper and all alloys thereof.But the vehicle-mounted urea that SCR pollutes removal system stores, transmission & distribution and quantitative system can comprise and come from ureaclastic ammonia, and comprise the assembly comprising copper.These assemblies also may be responsive to urea, therefore they are placed in housing, in order to avoid contact with urea.But the wall of protective housing is not completely not saturating ammonia.This configuration of the present invention can provide the working life of these assemblies, and this allows emergent functional fault in Pollution protection removal system, and provides advantage economically.
In the second modification, catcher is installed to be with fixing or dismountable mode and connects with wall.
The detachability of the means of fixation of catcher on wall allows to change catcher, such as, when catcher ammonia is saturated.
Catcher can be fixed according to different mode (such as glue together, weld, solid or other modes of spiral shell).
Advantageously, subtense angle comprises two rooms, wherein the first Room comprises ammonia catcher, described two rooms are separate by least one wall of the second Room, make to comprise in the second chamber, other destinations except the first Room can not be reached by permeability or the ammonia that leaked by the fracture of at least one wall described.
Advantageously, ammonia catcher comprises at least one in following element:
-thereon by adsorbing the material that store ammonia, can be more specifically salt, then being in particular alkaline earth metal chloride, such as magnesium chloride, and
-superabsorbent polymer.
If compared with other absorption components (such as active carbon), these elements have large absorptivity.Therefore the use of these elements allows to obtain the less catcher of volume.
These elements be also advantageous in that it is safe from danger to environment.
Finally, the feature of these elements is the ability trapping ammonia within relatively long period.
Advantageously, the form of superabsorbent polymer is the colloid (ammonia is trapped by this water) formed by described polymer absorption.
As modification, the wall separating the second Room of two rooms is the wall that two rooms have.
Alternatively, the wall that ammonia catcher is total with two rooms contacts.
This configuration can improve catching of ammonia, and described ammonia just contacts with this catcher once the wall by separation two rooms.
Alternatively, two rooms have two adjacent walls.
" adjacent " of wall refer to wall side by side (
), and separate specific distance.
As modification, the second Room is suitable for comprising ammonia predecessor.
Preferably, the second Room is suitable for comprising urea.
Alternatively, the second Room is made up of urea injection line.
Alternatively, the second Room is made up of urea storage storage tank.
Advantageously, the wall of at least one room is made up of thermoplastic material.
As modification, the first Room comprises the assembly to ammonia sensitivity.
Preferably, the assembly of ammonia sensitivity is made up of copper or its alloy, and preferably forms serpentine coil, the i.e. coil of the motor of urea pump.
Preferably, the second Room is suitable for holding the compound that it can be stored ammonia by absorption.
In fact, a kind of for providing the substitute technology of ammonia to be to store ammonia by the absorption on salt in SCR pollution removal system, this salt is alkaline earth metal chloride the most frequently.In this case, in general manner, storage system comprises the storage tank being designed to the heating plant containing this salt and be configured to heat this salt.Thus, ammonia is discharged by heating salt.The present invention can also ensure the safety of the SCR pollution removal system with this ammonia memory device.In fact, the ammonia that this configuration may be discharged suddenly under can being captured in fortuitous event from the room comprising ammonia, improve the Security that SCR pollutes removal system thus, wherein said fortuitous event is such as defect or the fracture of the wall of this room.
The applicant's European patent application EP 2574599 under one's name describes an example of the storage tank for being stored ammonia by the absorption on salt.Described storage tank comprises the cellular cavity of storage (alv é ole) of multiple mutual UNICOM, these cellular cavitys also with the perforate UNICOM of at least one and transmission and distribution pipeline UNICOM.Cellular cavity is the cavity that can comprise the compound it storing ammonia by adsorbing.
As modification, subtense angle comprises cellular cavity, restriction at least partially second Room of this cellular cavity.
Alternatively, at least another part of cellular cavity limits the first Room.
This embodiment of the present invention allows to simplify and accelerate to install, this is because provide two rooms with the form of single part.This configuration also allows to provide compacter subtense angle.
Advantageously, two rooms comprise makes fluid communication device for what make two room fluid communication, and these devices guide ammonia into first Room under adsorption operations situation is removed in the second Room overvoltage or storage device.
Overvoltage in second Room may be produced by the superheating of storage device.
Thus, (comprising and make the connection between fluid communication device and the second Room) at least partially and being arranged in the first Room of fluid communication device will be made.Therefore this part also benefits from the safety assurance system be made up of catcher.
Make fluid communication device can also for discharging the ammonia be stored in by adsorbing on catcher, to regenerate this catcher of process.
In the configuration, therefore catcher realizes three functions.
Advantageously, catcher is made up of the matrix of the whole free space occupying the first Room.
The space occupied by matrix increases along with the absorption of ammonia.Therefore matrix compressed in the space of the first Room, limits the flowing of ammonia through wall thus.
Matrix allows to improve catching of ammonia, and ammonia just contacts with catcher once the wall by separation two rooms.
Matrix realizes heat insulating function, this temperature that urea liquid can be stoped to reach too high, with distributing of limiting that ammonia causes due to decomposition.Heat insulation also convenient temperature urea liquid maintained higher than its solidification point.Finally, when adsorbed by salt store ammonia, salt can be maintained stable temperature by matrix, to optimize the control of release of ammonia by heating.
Theme of the present invention is also a kind of pollution removal system being removed pollution by selective catalytic reduction, and this system comprises subtense angle as above.
Finally, theme of the present invention is also a kind of housing for the assembly to ammonia sensitivity, described housing removes the pollution removal system of pollution by selective catalytic reduction for being placed in, wherein said pollution removal system is used for the amount of the nitrogen oxide in reduce engine motor-car exhausting air, the feature of described housing is, this housing comprises at least one wall and one and is configured to trap the ammonia that gives out from this at least one wall or as being not yet captured, the catcher of ammonia that may will give out from this at least one wall.
All modification that subtense angle is considered all are applicable to housing.
An optional feature of housing is, this housing comprises the equipment (such as pH test paper) to ammonia sensitivity, plays a role to record catcher, and this can be a kind of mode of always being protected of Verification Components simply when housekeeping operation.
Another favourable optional feature is to there is caulking agent (being commonly referred to as " caulkingagent ") in wall, to seal possible gap, and reduces, even eliminates the leakage of ammonia thus.
Accompanying drawing explanation
Reading exemplaryly provides and does not have any restrictive accompanying drawing, will be better understood the present invention, in the drawings:
Fig. 1 comprises the schematic diagram that urea stores the SCR pollution removal system of storage tank.
Fig. 2 is the view of the urea storage storage tank of the SCR pollution removal system meeting first embodiment of the invention.
Fig. 3 is the view of the urea storage storage tank of the SCR pollution removal system meeting second embodiment of the invention.
Fig. 4 is the view of the urea storage storage tank of the SCR pollution removal system meeting third embodiment of the invention.
Fig. 5 is the view of a part for the urea injection line of the SCR pollution removal system meeting fourth embodiment of the invention.
Fig. 6 and Fig. 7 is the view of the urea injection line meeting fifth embodiment of the invention.Fig. 6 is the sectional view of the IV-IV along Fig. 7, and Fig. 7 is the sectional view of the V-V along Fig. 6.
Fig. 8 is the sectional view of the urea storage storage tank meeting sixth embodiment of the invention.
Fig. 9 is the schematic diagram of the SCR pollution removal system comprising ammonia storage system.
Figure 10 is the view of the ammonia storage system meeting seventh embodiment of the invention.
Figure 11 is the view of the ammonia storage system meeting eighth embodiment of the invention.
Figure 12 is the view of the ammonia storage system meeting ninth embodiment of the invention.
Embodiment
In Fig. 1 to Fig. 8, the identical reference character of identical assembly indicates.
Referring now to Fig. 1, shown in this figure process the nitrogen oxides treatment system be present in the takeoff line 2 of Motor Vehicle 1.Nitrogen oxide is drawn towards catalyst converter 8, in this catalyst converter 8, realize selective catalytic reduction SCR.Selective catalytic reduction is realized by adding ammonia in exhausting air.In the example of fig. 1, the ammonia needed for this reduction comes from the urea liquid 4 be stored in urea storage storage tank 3.Urea is stored storage tank 3 and is connected with takeoff line 2 by urea injection line 5.By means of the effect of urea pump 6 being present in urea and storing storage tank 3 inside, the urea be present in storage tank 3 is sent to until urea injection line 5.Under the effect of urea injector 7, urea is injected in takeoff line 2.Along with time history and temperature variation, the part being contained in the urea in storage tank 3 is decomposed into ammonia.The ammonia of storage tank may store the component touch to ammonia sensitivity in storage tank 3 with being present in urea.
Figure 2 illustrates the first embodiment of the present invention.Urea storage storage tank 3 comprises the assembly 9 to ammonia sensitivity.This assembly is placed in the housing 10 limited by wall 17 and lid 11.Because the wall 17 of housing and lid 11 have hole for ammonia, in the wall 17 of housing and in the wall of lid 11, settle ammonia catcher 12, with the ammonia density in housing is maintained assembly can be caused to corrode threshold value under.This threshold value can be determined according to the time span of the character of assembly, temperature or exposure.This threshold value or these threshold values can obtain by experiment.In this example, subtense angle is made up of whole housing 10, and this housing is corresponding to the room comprising two walls (i.e. the wall 17 of housing and lid 11).Catcher 12 is configured to catch the ammonia given out from wall 17 or lid 11.Alternatively, catcher can be placed in wall or the lid of housing.In this embodiment, the form of catcher 12 is be integrated in the magnesium chloride granules in the wall 17 of the housing be made up of polymer and lid 11.In a specific embodiment, the wall 17 of housing has such as the thickness of approximately 2mm and has be approximately 1.25g/m every day at 80 DEG C
2permeability.In this specific embodiment, housing 10 has and is such as approximately 300cm
2the gross area.In this embodiment, the protection to assembly is guaranteed by the magnesium chloride of 3 to 6g.
Figure 3 illustrates the second embodiment of the present invention.Be placed in housing 10 ' to the assembly 9 ' of ammonia sensitivity, this housing 10 ' is equipped with lid 11 ' and is placed in the urea limited by wall 18 and stores near storage tank 3.The wall 18 that the wall 17 ' of housing and urea store storage tank 3 can be the single wall that two rooms have.Because these two walls have hole to ammonia, inner at storage tank 3, settle ammonia catcher 12 ' near the position of housing 10 ', with the ammonia density in housing is maintained assembly can be caused to corrode threshold value under.This threshold value can be determined according to the time span of the character of assembly, temperature and exposure.This threshold value or these threshold values can obtain by experiment.In this example, the entirety that subtense angle stores storage tank 3 by urea is formed, and this storage tank is corresponding to the room comprising wall 18.Catcher 12 ' is configured to catch may by the ammonia given out from wall 18 (if described ammonia be also captured).Catcher is provided with the protective 19 that restriction ammonia catcher directly contacts with the liquid phase of ammonia predecessor.In this embodiment, catcher 12 ' is installed to be and connects with wall 18.In this embodiment, the protection to assembly is guaranteed by the magnesium chloride of 1 to 2g.In a specific embodiment, the wall 18 that the wall 17 ' of housing 10 ' and urea store storage tank 3 has the total thickness of 2mm and equal 1.25g/m every day at 80 DEG C
2permeability.This total wall has such as 100cm
2area, or stack at two wall, described two walls can at 100cm
2area on stack.
Figure 4 illustrates the third embodiment of the present invention.Urea storage storage tank 3 comprises the assembly 9 to ammonia sensitivity ".This assembly is placed in has wall 17 " and lid 11 is equipped with " housing 10 ".Wall 17 due to housing " and lid 11 " have hole for ammonia, the lid 11 at housing " in settle ammonia catcher 12 ", with the ammonia density in housing is maintained assembly can be caused to corrode threshold value under.This threshold value can be determined according to the time span of the character of assembly, temperature and exposure.This threshold value or these threshold values can obtain by experiment.In this example, subtense angle is by housing 10 " and urea store the entirety of storage tank 3 and form, wherein said housing corresponds to the first Room, and described urea stores storage tank then corresponding to the second Room.These two rooms by correspond to the second Room wall, housing 10 " wall 17 " separated from one another.In this embodiment, catcher 12 " form be adsorber (tampon) that the foam with open cell lattice be such as made up of polyethylene is formed, that be soaked with magnesium chloride.In a specific embodiment, housing 10 " wall there is the thickness being such as approximately 1mm, and have be approximately 2.5g/m every day at 80 DEG C
2permeability.In this specific embodiment, housing 10 " have and be such as approximately 300cm
2the gross area.In this embodiment, the protection to assembly is guaranteed by the magnesium chloride of 6 to 12g.
Figure 5 illustrates the fourth embodiment of the present invention.Urea injection line 5 comprises the assembly 9 to ammonia sensitivity " '.As in previous embodiment, assembly 9 " ' be placed in there is wall 17 " ' and lid 11 is equipped with " ' housing 10 " '.Ammonia catcher 12 " ' be placed in the lid of housing.In this example, subtense angle is by the housing 10 corresponding to the first Room " ' and form corresponding to the entirety of the urea injection line 5 of the second Room.These two rooms by correspond to the wall of the second Room, housing 10 " ' wall 17 " ' separated from one another.Catcher 12 " ' form be adsorber that the foam with open cell lattice be such as made up of polyethylene is formed, that be soaked with magnesium chloride.In a specific embodiment, housing 10 " ' wall 17 " ' be made up of polyphthalamide (PPA), has the thickness of such as 1mm, and have be approximately 2.5g/m every day at 80 DEG C
2ammonia permeability.In this specific embodiment, housing 10 " ' have such as 300cm
2the gross area.In this embodiment, the protection to assembly during 40 days (about 1000 hours) is guaranteed by the magnesium chloride of 2 to 6g.
Show the fifth embodiment of the present invention in figure 6 and figure 7.The sleeve 13 of urea injection line 5 involved ammonia catcher 14 over a part of its length surrounds.In this example, subtense angle is by corresponding to the sleeve 13 of the first Room and forming corresponding to the entirety of the urea injection line 5 of the second Room.These two rooms by correspond to the wall of the second Room, the wall of urea injection line 5 is separated from one another.In this embodiment, catcher is made up of magnesium chloride crystal.In a specific embodiment, wall is made up of polyamide 66 (PA66) and has for the thickness of about 1mm be approximately 0.5g/m every day at 40 DEG C
2ammonia permeability.In this specific embodiment, for the urea injection line of the about 4mm of diameter, the about 1m of length, capped area is approximately 125cm
2.In this embodiment, in during 40 days (about 1000 hours), the ammonia of about 0.25g distributes through the wall of urea injection line.The magnesium chloride of about 0.25g can guarantee the ammonia trapping this dosage.In this specific embodiment, the amount forming the magnesium chloride of catcher is in such an embodiment approximately 0.5 to 2g.
Figure 8 illustrates the sixth embodiment of the present invention.The shell 15 that urea stores the involved ammonia catcher 16 of storage tank 3 surrounds.In this example, subtense angle is by corresponding to the shell 15 of the first Room and forming corresponding to the entirety of the urea storage storage tank 3 of the second Room.These two rooms by correspond to the wall of the second Room, that urea stores the wall of storage tank 3 is separated from one another.In this embodiment, catcher is made up of magnesium chloride matrix.In a specific embodiment, wall is made up of high-density polyethylene plastics (PEhd), and has for the thickness of about 1mm be approximately 1.5g/m every day at 80 DEG C
2ammonia permeability.In a specific embodiment, for thickness and about 1m of about 4mm
2storage tank area, can such as by the magnesium chloride of 14g guarantee 40 days (about 1000 hours) period protection.In reality, in this embodiment, catcher comprises the magnesium chloride of about 15 to 25g.
In Fig. 9 to Figure 12, identical assembly is indicated by identical reference character.
Schematically illustrate the example that system is removed in that comprise ammonia storage system, removed pollution by SCR selective catalytic reduction pollution in fig .9.The invention is not restricted to the SCR system example that this has atmosphere storage.Vehicle motor 21 is controlled by electronic calculator 22.Motor 21 cooperates with SCR system 23.At engine export place, exhausting air 41 is drawn towards ammonia injection module 31, and in this ammonia injection module, ammonia 72 mixes with exhausting air 41.Ammonia/exhausting air mixture 43 is then through SCR catalyst 32, and this SCR catalyst can reduce nitrogen oxide (NOx) by ammonia.Be removed polluted exhausting air 44 and be then drawn towards exhaust outlet.
SCR system 23 comprises ammonia storage system 25.This storage system 25 comprises cellular cavity 54, and storing in cellular cavity is such as the compound 52 of solid (and being preferably salt).Ammonia is stored in by adsorbing on solid 52.Storage system 25 also comprises control apparatus 24, and this equipment is responsible for controlling heating plant 53, with heat solid 52, thus release ammonia.Cellular cavity 54 is connected with quantitative module 51 via transmission and distribution pipeline 27.Quantitative module 51 is managed by control apparatus 24.Control apparatus 24 can estimate the pressure of the ammonia in storage system 25.If find there is deviation between the pressure of estimation and the instruction pressure provided by electronic calculator 22, control apparatus 24 just can regulate the heating power of heating plant 53, to compensate this deviation.Storage tank 54 is equipped with temperature measurement equipment 26.
Figure 10 with comprise ammonia storage system by SCR selective catalytic reduction remove pollution pollution remove system show the seventh embodiment of the present invention.The cellular cavity 54 comprising the compound 52 by absorbing and storing ammonia on it is surrounded by shell 63, and this shell 63 limits the room comprising ammonia catcher 62 according to the invention.The transmission and distribution pipeline 27 be connected with cellular cavity 54 links triple valve 60.In cellular cavity 54, there is overvoltage and uncontrolled equipment 24 act on and to be positioned at cellular cavity 54 downstream assembly (being temperature measurement equipment 26 in this example) discharge ammonia, excess of ammonia is caused pipeline 61 by break-in, and this pipeline 61 is connected with the shell 63 comprising catcher 62.In this example, subtense angle is by corresponding to the shell 63 of the first Room and forming corresponding to the cellular cavity 54 of the second Room.Shell 63 and cellular cavity 54 by correspond to the wall of the second Room, the wall of cellular cavity 54 is separated from one another.Transmission and distribution pipeline 27, triple valve 60 and pipeline 61 are formed in and make fluid communication device in the scope of the invention.Here catcher has three functions mentioned: ensure the second Room and make the safety of a part of fluid communication device, and management overvoltage and remove absorption.In this embodiment, cellular cavity 54 has the volume of 500ml.Catcher 62 is made up of magnesium chloride matrix.
In a specific embodiment, the hot activation removing absorption causes the ammonia discharging about 1g, and this is presented as the overvoltage occurring about 4bar in cellular cavity 54.When the system is shut down, all ammonia removing absorption is drawn towards catcher.Such as, the ammonia trapping about 1g needs the magnesium chloride of 0.93g.But the magnesium chloride such as arranging 5g for catcher is favourable, effectively to absorb the ammonia of all unexpected discharges.
Under such as the wall defectiveness of cellular cavity 54 or the fortuitous event of fracture, at the temperature of 40 DEG C, the releasing absorption of ammonia is carried out with the flow of about 3.5mg/s (i.e. 1 hour about 12.6g ammonia).In this specific embodiment, the ammonia adsorbing this dosage needs the magnesium chloride of about 11.9g.Such as, the catcher comprising the magnesium chloride of 12g can guarantee the protection for this fortuitous event during about 1 hour.
Finally, if will in long-time trapping come from remove adsorb ammonia, be namely included in whole ammonia in cellular cavity 54, so need the catcher comprising such as 300g magnesium chloride.
Figure 11 removes the eighth embodiment of the present invention that shows of system with the pollution removing pollution by SCR selective catalytic reduction comprising ammonia storage system.The same shell 59 of three identical, each cellular cavity 54a, 54b and 54c involved ammonia catchers 58 for 500ml surrounds.In this example, three subtense angles are considered.First subtense angle is by corresponding to the shell 59 of the first Room and forming corresponding to the entirety of the cellular cavity 54a of the second Room.Second subtense angle is by corresponding to the shell 59 of the first Room and forming corresponding to the entirety of the cellular cavity 54b of the second Room.3rd subtense angle is by corresponding to the shell 59 of the first Room and forming corresponding to the entirety of the cellular cavity 54c of the second Room.By correspond to the wall of the second Room of each subtense angle, shell 59 and these cellular cavitys separate by the wall of these three cellular cavitys.The transmission and distribution pipeline 27 be connected with cellular cavity 54a, 54b and 54c is equipped with overvoltage valve 56.In cellular cavity 54a, 54b and 54c, there is overvoltage and uncontrolled equipment 24 act on and to be positioned at cellular cavity 54a, 54b and 54c downstream assembly (being temperature measurement equipment 26 in this example) discharge ammonia, excess of ammonia is caused the pipeline 57 be connected with the shell 59 comprising catcher 58 by break-in.Transmission and distribution pipeline 27, overvoltage valve 56 and pipeline 57 are formed in and make fluid communication device in the scope of the invention.As in last accompanying drawing, catcher also has three described functions.Catcher 58 is made up of magnesium chloride matrix.
In a specific embodiment, the hot activation removing absorption causes the ammonia discharging about 1g in each cellular cavity 54a, 54b and 54c, and this is presented as the overvoltage occurring being about 4000hPa in each cellular cavity.When the system is shut down, all ammonia removing absorption is drawn towards catcher.Trap the magnesium chloride that the ammonia coming from about 3g of three cellular cavitys needs about 2.79g.But the magnesium chloride arranging 15g for catcher is favourable, effectively to absorb the ammonia of all unexpected discharges.
Under the wall defectiveness of such as cellular cavity or the fortuitous event of fracture, at the temperature of 40 DEG C, the releasing absorption of ammonia is carried out with the flow of about 3.5mg/s (i.e. 1 hour about 12.6g ammonia).The ammonia absorbing this dosage needs the magnesium chloride of such as 11.9g.The catcher comprising the magnesium chloride of about 12g such as can guarantee the protection for this fortuitous event during about 1 hour.
Finally, if will in long-time trapping come from remove adsorb ammonia, be namely included in whole ammonia in cellular cavity 54a, 54b and 54c, so need the catcher comprising such as 900g magnesium chloride.
Figure 12 with comprise ammonia storage system by SCR selective catalytic reduction remove pollution pollution remove system show the ninth embodiment of the present invention.Cellular cavity 70 comprises two compartments 74 and 73 separated by partition 71.Compartment 74 inclusion compound 52, this compound has ammonia by absorbing and storing.The transmission and distribution pipeline 27 be connected with compartment 74 links triple valve 60.Overvoltage is there is and uncontrolled equipment effect and to when being positioned at assembly (in this example for temperature measurement equipment 26) the discharge ammonia in container 70 downstream, excess of ammonia is caused the pipeline 61 be connected with the compartment 74 comprising catcher 62 by break-in in compartment 74.In this example, subtense angle is by corresponding to the compartment 73 of the first Room and forming corresponding to the compartment 74 of the second Room.As in front two width accompanying drawings, catcher also has three functions, although the wall separating two rooms in this example not exclusively surrounds another room.In this embodiment, compartment 74 has the volume of 500ml.Catcher 62 is made up of magnesium chloride matrix.
In a specific embodiment, the hot activation removing absorption causes the ammonia discharging about 1g, and this is presented as the overvoltage occurring being approximately 4000hPa in compartment 74.When the system is shut down, all ammonia removing absorption is drawn towards catcher.The ammonia trapping about 1g needs the magnesium chloride of such as 0.93g.But, for the magnesium chloride of catcher setting example as 5g is favourable, effectively to absorb the ammonia of all unexpected discharges.
Under the fortuitous event such as cutting off 71 defectiveness or fracture, at the temperature of 40 DEG C, the releasing absorption of ammonia is carried out with the flow of about 3.5mg/s, namely 1 hour about 12.6g ammonia.The ammonia absorbing this dosage needs the magnesium chloride of such as 11.9g.The catcher comprising about 12g magnesium chloride can guarantee the protection for this fortuitous event during about 1 hour.
Finally, if will in long-time trapping come from remove adsorb ammonia, be namely included in whole ammonia in compartment 74, so need the catcher comprising about 300g magnesium chloride.
The invention is not restricted to described embodiment, other embodiments are obvious for those skilled in the art.Especially, two embodiments illustrated in figs. 2 and 3 can be changed, to add at least one second catcher in the part relative with the first catcher of housing.
Each embodiment can also be changed in the form of catcher (salt etc. of matrix, crystal habit).Catcher can comprise other salt, such as strontium chloride or calcium chloride.Alternatively, catcher can also be made up of water-filled superabsorbent polymer.
Claims (10)
1. the housing for the assembly to ammonia sensitivity, described housing is for being placed in the pollution removal system of being depolluted by selective catalytic reduction for reduce engine motor-car exhausting air amount of nitrogen oxides, the feature of described housing is, this housing comprises at least one wall and at least one catcher, and this catcher is configured to catch the ammonia that gives out from this at least one wall or as being not yet captured, the ammonia that may will give out from this at least one wall.
2. housing as claimed in claim 1, wherein, described catcher is integrated in described wall.
3. housing as claimed in claim 1, wherein, described catcher is installed to be with fixing or dismountable mode and connects with described wall.
4. the housing according to any one of the claims, wherein, described ammonia catcher comprises at least one in following element:
-thereon by adsorbing the material that store ammonia, can be more specifically salt, then being in particular alkaline earth metal chloride, such as magnesium chloride, and
-superabsorbent polymer.
5. housing as claimed in claim 4, wherein, the form of described superabsorbent polymer is the colloid formed by described polymer absorption.
6. the housing according to any one of the claims, this housing comprises the equipment to ammonia sensitivity.
7. the housing according to any one of the claims, is characterized in that, in described wall, there is caulking agent, to seal possible crack, and reduces, even eliminates the leakage of ammonia thus.
8. the housing according to any one of the claims, wherein, the described assembly to ammonia sensitivity is the coil of the motor of urea pump.
9. the housing according to any one of the claims, the feature of described housing is, this housing is placed in the described urea being removed the pollution removal system of pollution by selective catalytic reduction and stores storage tank.
10. the housing according to any one of claim 1 to 8, the feature of described housing is, this housing is placed in the described urea injection line being removed the pollution removal system of pollution by selective catalytic reduction.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1352387 | 2013-03-18 | ||
| FR1352387A FR3003184B1 (en) | 2013-03-18 | 2013-03-18 | SELECTIVE CATALYTIC REDUCTION DEPOLLUTION SYSTEM |
| PCT/FR2014/050626 WO2014147335A1 (en) | 2013-03-18 | 2014-03-18 | Selective catalytic reduction pollution-control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105518264A true CN105518264A (en) | 2016-04-20 |
Family
ID=48741338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480016354.3A Pending CN105518264A (en) | 2013-03-18 | 2014-03-18 | Pollution Removal System for Removing Pollution by Selective Catalytic Reduction |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20160290203A1 (en) |
| EP (1) | EP2976514A1 (en) |
| CN (1) | CN105518264A (en) |
| FR (1) | FR3003184B1 (en) |
| WO (1) | WO2014147335A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014118760A1 (en) * | 2014-12-16 | 2016-06-16 | Continental Automotive Gmbh | Tank device for an aqueous urea solution and method for reducing an ice pressure in a tank device |
| GB2567211B (en) * | 2017-10-06 | 2021-07-07 | Siemens Plc | Uses of an absorbent, and methods and apparatuses relating thereto |
| GB2567205B (en) * | 2017-10-06 | 2021-06-23 | Siemens Plc | Uses of an absorbent, and methods and apparatuses relating thereto |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080066453A1 (en) * | 2006-09-18 | 2008-03-20 | Christopher Oberski | Management of a Plurality of Reductants for Selective Catalytic Reduction |
| EP1911508A2 (en) * | 2006-10-13 | 2008-04-16 | Peugeot Citroen Automobiles SA | System for treating nitrogen oxides with ammonia trapping system |
| JP2009115030A (en) * | 2007-11-08 | 2009-05-28 | Toyota Motor Corp | Urea water storage structure and exhaust emission control device |
| JP2009191747A (en) * | 2008-02-14 | 2009-08-27 | Toyota Motor Corp | Urea water supply device for internal combustion engine |
| US20090324453A1 (en) * | 2008-06-25 | 2009-12-31 | Cummins Filtration Ip, Inc. | Catalytic Devices for Converting Urea to Ammonia |
| CN102926846A (en) * | 2011-08-05 | 2013-02-13 | 康明斯排放处理公司 | Nh3 emissions management in a nox reduction system |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003220333A (en) * | 2002-01-31 | 2003-08-05 | Japan Vilene Co Ltd | Ammonia gas capturing composite material and alkaline battery using the same |
| JP4103436B2 (en) * | 2002-04-23 | 2008-06-18 | 三菱ふそうトラック・バス株式会社 | Yulia water tank |
| JP2003340276A (en) * | 2002-05-24 | 2003-12-02 | Japan Vilene Co Ltd | Ammonia gas trapping composite material and alkaline battery |
| US7849674B2 (en) * | 2003-09-19 | 2010-12-14 | Nissan Diesel Motor Co., Ltd. | Exhaust emission purifying apparatus for engine |
| EP1739380B1 (en) * | 2005-06-21 | 2012-03-21 | Calsonic Kansei Corporation | Oil cooler |
| FR2903677A1 (en) * | 2006-07-12 | 2008-01-18 | Inergy Automotive Systems Res | STORAGE SYSTEM FOR AMMONIA PRECURSOR |
| JP2009103069A (en) * | 2007-10-24 | 2009-05-14 | Denso Corp | Tank device and exhaust emission control system |
| DE102008001340A1 (en) * | 2008-04-23 | 2009-10-29 | Robert Bosch Gmbh | Ammoniaktank an exhaust treatment plant of a vehicle |
| JP2010163908A (en) * | 2009-01-13 | 2010-07-29 | Toyota Motor Corp | Ammonia burning internal combustion engine |
| FR2960862B1 (en) * | 2010-06-04 | 2014-01-03 | Peugeot Citroen Automobiles Sa | RESERVOIR INCLUDING SECURE UREE |
| EP2574599A1 (en) | 2011-09-30 | 2013-04-03 | Inergy Automotive Systems Research (Société Anonyme) | Container for storing ammonia by sorption |
-
2013
- 2013-03-18 FR FR1352387A patent/FR3003184B1/en not_active Expired - Fee Related
-
2014
- 2014-03-18 EP EP14716884.3A patent/EP2976514A1/en not_active Withdrawn
- 2014-03-18 WO PCT/FR2014/050626 patent/WO2014147335A1/en active Application Filing
- 2014-03-18 CN CN201480016354.3A patent/CN105518264A/en active Pending
- 2014-03-18 US US14/777,646 patent/US20160290203A1/en not_active Abandoned
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080066453A1 (en) * | 2006-09-18 | 2008-03-20 | Christopher Oberski | Management of a Plurality of Reductants for Selective Catalytic Reduction |
| EP1911508A2 (en) * | 2006-10-13 | 2008-04-16 | Peugeot Citroen Automobiles SA | System for treating nitrogen oxides with ammonia trapping system |
| JP2009115030A (en) * | 2007-11-08 | 2009-05-28 | Toyota Motor Corp | Urea water storage structure and exhaust emission control device |
| JP2009191747A (en) * | 2008-02-14 | 2009-08-27 | Toyota Motor Corp | Urea water supply device for internal combustion engine |
| US20090324453A1 (en) * | 2008-06-25 | 2009-12-31 | Cummins Filtration Ip, Inc. | Catalytic Devices for Converting Urea to Ammonia |
| CN102926846A (en) * | 2011-08-05 | 2013-02-13 | 康明斯排放处理公司 | Nh3 emissions management in a nox reduction system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014147335A1 (en) | 2014-09-25 |
| FR3003184A1 (en) | 2014-09-19 |
| FR3003184B1 (en) | 2016-12-09 |
| EP2976514A1 (en) | 2016-01-27 |
| US20160290203A1 (en) | 2016-10-06 |
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Application publication date: 20160420 |