CN114076017A - Nitrogen oxide mixed treatment device - Google Patents

Nitrogen oxide mixed treatment device Download PDF

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Publication number
CN114076017A
CN114076017A CN202010815769.4A CN202010815769A CN114076017A CN 114076017 A CN114076017 A CN 114076017A CN 202010815769 A CN202010815769 A CN 202010815769A CN 114076017 A CN114076017 A CN 114076017A
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CN
China
Prior art keywords
mixer
outer shell
treatment device
nozzle
nitrogen oxides
Prior art date
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Pending
Application number
CN202010815769.4A
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Chinese (zh)
Inventor
李会利
苏继龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanhe Keda Science & Technology Co ltd
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Sanhe Keda Science & Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sanhe Keda Science & Technology Co ltd filed Critical Sanhe Keda Science & Technology Co ltd
Priority to CN202010815769.4A priority Critical patent/CN114076017A/en
Publication of CN114076017A publication Critical patent/CN114076017A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—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 constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
    • F01N13/1844—Mechanical joints
    • F01N13/1855—Mechanical joints the connection being realised by using bolts, screws, rivets or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F01N3/2073—Selective catalytic reduction [SCR] with means for generating a reducing substance from the exhaust gases
    • 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
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/14—Nitrogen oxides
    • 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
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

The application discloses nitrogen oxide hybrid processing apparatus includes: the mixer comprises an outer shell with a hollow interior and a mixer arranged in the outer shell; an air inlet is formed in one end, close to the mixer, of the outer shell, a cyclone structure is arranged at one end, far away from the mixer, of the outer shell, and the cyclone structure is used for homogenizing air and guiding flow; the mixer is hollow, a plurality of first through holes are arranged on the side wall of the mixer at intervals, and a guide plate facing the inner wall of the outer shell is arranged at the edge of each first through hole; the upper end of the outer shell is vertically provided with a through nozzle which faces the interior of the mixer and is used for injecting reactants; and a filtering screen mesh for decomposing gas particles is arranged at the lower end in the mixer. The device improves the catalytic reaction efficiency of the nitrogen oxide and controls the problem of ammonia leakage; the exhaust resistance is reduced, the exhaust back pressure is reduced, the flow field uniformity and the urea crystallization resistance are improved, and the working efficiency is improved.

Description

Nitrogen oxide mixed treatment device
Technical Field
The disclosure generally relates to the technical field of tail gas treatment, in particular to a nitrogen oxide mixed treatment device.
Background
Environmental governance is an important subject of current world development, and environmental pollution is harmful to human health. For fuel engines, especially for pollutants discharged by engine exhaust which takes diesel oil as raw material, the pollution to the atmospheric environment is serious before the pollutants are not treated, and in order to treat the pollutants discharged by the engine exhaust, the state implements the standards for controlling the exhaust emission, gradually improves the standards and achieves the aim of treating the atmospheric pollution. An important index for the treatment of the exhaust emission of the engine is the control of the emission limit value of nitrogen oxides. The control of nitrogen oxide emission index is realized by a selective nitrogen oxide reactor.
Selective nitrogen oxide reactor mixers come in a variety of forms: for example, the exhaust gas of the engine is discharged into a selective nitrogen oxide reactor, is directly mixed with the ammonia gas decomposed from the urea solution sprayed from a urea nozzle, and then enters the nitrogen oxide reactor to react under the action of a catalyst in a carrier; there are other types of mixers, such as by adding a perforated plate at the front end of the mixer, and the like, and the effect is not obvious; in addition, the mixed particles have large volume, small contact area with the catalyst after entering the carrier, low reaction efficiency, poor catalytic effect, serious ammonia leakage and easy crystallization of the urea.
Disclosure of Invention
In view of the above-mentioned drawbacks and deficiencies of the prior art, it would be desirable to provide a nitrogen oxide mixing treatment device.
A nitrogen oxide mixed treatment apparatus comprising: the mixer comprises an outer shell with a hollow interior and a mixer arranged in the outer shell; an air inlet is formed in one end, close to the mixer, of the outer shell, a cyclone structure is arranged at one end, far away from the mixer, of the outer shell, and the cyclone structure is used for homogenizing air and guiding flow;
the mixer is hollow, a plurality of first through holes are arranged on the side wall of the mixer at intervals, and a guide plate facing the inner wall of the outer shell is arranged at the edge of each first through hole; the upper end of the outer shell is vertically provided with a through nozzle which faces the interior of the mixer and is used for injecting reactants; and a filtering screen mesh for decomposing gas particles is arranged at the lower end in the mixer.
According to the technical scheme that this application embodiment provided, the whirlwind structure is established to the connecting plate with the inner wall connection of shell body, be equipped with the second through-hole of several spaced on the connecting plate, second through-hole border is equipped with semicircular water conservancy diversion spare.
According to the technical scheme that this application embodiment provided, still be equipped with the inlet port of several spaced on the blender lateral wall, the inlet port sets up in the one side that is close to the nozzle relatively.
According to the technical scheme that this application embodiment provided, inside cavity and the outer cavity of being equipped with of shell body, the blender sets up in the cavity, outer cavity sets up in the blender below and is located and is close to filtering screen one side relatively, interior cavity and outer cavity communicate with the blender is inside respectively.
According to the technical scheme provided by the embodiment of the application, the flanges for connection are respectively arranged at the edges of the two ends of the outer shell.
According to the technical scheme provided by the embodiment of the application, the upper end of the nozzle is provided with a fastening nut for fixing.
According to the technical scheme provided by the embodiment of the application, the mixer is of a cylindrical structure, and the axis of the mixer is perpendicular to the axis of the outer shell.
In summary, according to the technical scheme of the application, the mixer is arranged, so that the gas can be uniformly mixed, and the induction efficiency is improved; when using this device, at first let in automobile exhaust shell body, the tail gas that contains nitrogen oxide gets into inside the blender, urea liquid on the nozzle simultaneously, decompose into ammonia etc. after the urea liquid atomization, nitrogen oxide and urea liquid take place the reaction in the blender, become harmful gas, the deflector can make tail gas form spiral shell whirlwind, make it fully mix for gas particle with the ammonia, then make the gas particle breakage be littleer gas particle through filtering wire net, form the spiral shell whirlwind of the many times little thigh, the whirlwind structure can improve gaseous mixedness. The device improves the catalytic reaction efficiency of the nitrogen oxide and controls the problem of ammonia leakage; the exhaust resistance is reduced, the exhaust back pressure is reduced, the flow field uniformity and the urea crystallization resistance are improved, and the working efficiency is improved.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic structural diagram of the present application;
FIG. 2 is a schematic diagram of the mixer of the present application;
FIG. 3 is a schematic structural diagram of the present application;
fig. 4 is a schematic structural diagram of an embodiment of the present application.
Reference numbers in the figures: 1. an outer housing; 2. a mixer; 3. an air inlet; 4. a cyclone structure; 5. a guide plate; 6. a nozzle; 7. filtering the silk screen; 8. a connecting plate; 9. a flow guide member; 10. an air inlet; 11. an inner cavity; 12. an outer cavity; 13. a flange body; 14. and tightening the nut.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example one
A nitrogen oxide mixed treatment apparatus comprising: an outer shell 1 with a hollow interior and a mixer 2 arranged in the outer shell 1; an air inlet 3 is formed in one end, close to the mixer 2, of the outer shell 1, a cyclone structure 4 is formed in one end, far away from the mixer 2, of the outer shell 1, and the cyclone structure 4 is used for homogenizing air and guiding flow;
the mixer 2 is hollow, a plurality of first through holes are arranged on the side wall of the mixer 2 at intervals, and a guide plate 5 facing the inner wall of the outer shell 1 is arranged at the edge of each first through hole; a penetrating nozzle 6 is vertically arranged at the upper end of the outer shell 1, and the nozzle 6 faces the interior of the mixer 2 and is used for injecting reactants; and a filtering screen 7 for decomposing gas particles is arranged at the inner lower end of the mixer 2.
When the device is used, as shown in figure 1, firstly, automobile exhaust is introduced into an outer shell 1, the exhaust containing nitrogen oxides enters a mixer 2 from an air inlet 3, meanwhile, atomized urea liquid is introduced into a nozzle 6, the atomized urea liquid is decomposed into ammonia gas and the like, and the nitrogen oxides and the urea liquid are mixed in the mixer 2; as shown in fig. 2, blender 2 can be approximate to the wind wheel structure, the functioning speed of mist has been increased, deflector 5 can make tail gas form spiral shell whirlwind, make it fully mix with the ammonia be gaseous granule, filter wire 7 establishes the cylinder structure of multilayer stainless steel wire net winding parcel, filter wire 7 can make the gaseous granule breakage through in it be littleer gaseous granule, form the spiral shell whirlwind of the many times little thigh, get into other devices through cyclone structure 4 afterwards, cyclone structure 4 can improve gaseous mixedness.
Wherein, the urea solution sprayed from the nozzle 6 is mixed, atomized and pyrolyzed in the spiral airflow (NH)2)2CO→NH3+NHCO；
When the mixed gas flow passes through the filtering screen 7, the urea solution on the surface of the filtering screen 7 can be further pyrolyzed, so that NH is increased3The mixed gas uniformly enters the SCR carrier in the outer cavity 12 of the mixer 2 through the cyclone structure, and in the SCR carrier, intermediate products NHCO and water vapor H decomposed by the urea solution2O continues to decompose into NH under the catalytic action of the metal oxide of the SCR carrier3And CO2,And (3) urea is subjected to decomposition reaction: (NH)3)2CO+H2O→2NH3+CO2；
The nitrogen oxides in the tail gas and the ammonia released after the urea is decomposed are subjected to catalytic decomposition reaction: NO + NO2+2NH3→2N2+3H2O; oxidizing ammonia gas: 4NH3+3O2→2N2+6H2O。
The test shows that the exhaust resistance of the device is 30% lower than the conventional one, and the back pressure is reduced by 20%; the flow field uniformity is 10% better than that of the conventional method, and the anti-urea crystallization force is more than twice as strong as that of the conventional method.
As shown in fig. 4, the exhaust gas aftertreatment device generally comprises a DOC, a DPF, and an SCR catalyst, which are combined together by a pipe bracket; the front end connected with the device is an exhaust end of an internal combustion engine, a DOC carrier end or a DPF carrier end, the rear end connected with the device is an SCR carrier, and reacted gas flows into the SCR carrier; when the air flow enters the mixer 2, the spiral air flow is formed by changing the moving direction of the air flow, the structural characteristics of the spiral air flow can form spiral power, and the contact area of the tail gas, the urea solution and the ammonia decomposed from the urea solution is increased by the spiral power, so that the aim of fully mixing is fulfilled; a spiral gas column is formed by spiral gas flow characteristics to increase power, so that gas is decomposed into small rotational flow bodies by impacting a porous multi-layer filtering screen 7, and a uniform atomization effect is achieved; after urea liquid is evenly atomized, the direction of air flow is changed again through the cyclone structure 4 to form secondary spiral wind, secondary spiral force to gas is formed, and intermediate products NHCO and H decomposed by the urea liquid2O enters the SCR carrier and undergoes selective oxidation-reduction reaction under the action of the catalyst to be continuously decomposed into NH3And CO2The mixing degree of the nitrogen oxide and the urea liquid and the decomposition rate of the ammonia are fully improved, and the aims of improving the reaction efficiency and controlling the ammonia leakage are fulfilled; the filtering wire net 7 can be approximately regarded as a mixed particle crushing structure, the mixed contact surface and the mixing time of nitrogen oxides in ammonia gas and tail gas decomposed by atomized urea liquid are increased, gas mixed particles become smaller through the filtering wire net 7, a plurality of small cyclone bodies are formed by a large cyclone body from the beginning, and the flow field passing through the SCR catalyst is more uniform.
In conclusion, the device improves the catalytic reaction efficiency of the nitrogen oxides and controls the problem of ammonia leakage; the exhaust resistance is reduced, the back pressure is reduced, the flow field uniformity and the urea crystallization resistance are improved, and the working efficiency is improved.
In order to further optimize the above technical solution, the technical solution is preferably further provided with the following improvements: the cyclone structure 4 is provided with a connecting plate 8 connected with the air outlet, the connecting plate 8 is provided with a plurality of spaced second through holes, and the edges of the second through holes are provided with semicircular flow guide pieces 9. As shown in fig. 3, the cyclone structure 4 can be similar to a wind wheel structure, which can further improve the mixing uniformity of the gas and increase the running speed of the mixed gas.
In order to further optimize the above technical solution, the technical solution is preferably further provided with the following improvements: a plurality of spaced air inlet holes 10 are further formed in the side wall of the mixer 2, and the air inlet holes 10 are formed in one side, close to the nozzle 6 relatively. As shown in fig. 3, the exhaust gas enters the mixer 2 through the air inlet holes 10 to form a barrier layer, which prevents the ammonia gas decomposed from the urea solution sprayed from the nozzle 6 from diffusing upwards, and ensures that the entering exhaust gas forms a fixed vortex wind in the mixer 2.
In order to further optimize the above technical solution, the technical solution is preferably further provided with the following improvements: the utility model discloses a filter screen, including shell body 1, blender 2, outer cavity 12, outer cavity 11, outer cavity 12, outer cavity 11 and outer cavity 12, outer cavity 12 sets up in 2 below of blender and is located and is close to filter screen 7 one side relatively, interior cavity 11 and outer cavity 12 communicate with 2 inside of blender respectively. As shown in fig. 3, the tail gas firstly enters the mixer 2 from the inner cavity 11, and the reacted mixed gas enters the outer cavity 12 through the mixer 2 and then passes through the cyclone structure 4.
In order to further optimize the above technical solution, the technical solution is preferably further provided with the following improvements: and flanges 13 for connection are respectively arranged at the edges of two ends of the outer shell 1.
In order to further optimize the above technical solution, the technical solution is preferably further provided with the following improvements: the upper end of the nozzle 6 is provided with a fastening nut 14 for fixing.
In order to further optimize the above technical solution, the technical solution is preferably further provided with the following improvements: the mixer 2 is provided with a cylindrical structure, and the axis of the mixer 2 is vertical to the axis of the outer shell 1.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (7)

1. A nitrogen oxide mixing treatment device is characterized in that: the method comprises the following steps: an outer shell (1) with a hollow interior and a mixer (2) arranged in the outer shell (1); an air inlet (3) is formed in one end, close to the mixer (2), of the outer shell (1), a cyclone structure (4) is arranged in one end, far away from the mixer (2), of the outer shell (1), and the cyclone structure (4) is used for homogenizing air and guiding flow;
the mixer (2) is hollow, a plurality of first through holes are arranged on the side wall of the mixer (2) at intervals, and a guide plate (5) facing the inner wall of the outer shell (1) is arranged at the edge of each first through hole; the upper end of the outer shell (1) is vertically provided with a through nozzle (6), and the nozzle (6) faces the interior of the mixer (2) and is used for injecting reactants; and a filtering screen (7) for decomposing gas particles is arranged at the lower end in the mixer (2).
2. The mixed treatment device of nitrogen oxides as claimed in claim 1, characterized in that: the cyclone structure (4) is arranged as a connecting plate (8) connected with the inner wall of the outer shell (1), a plurality of spaced second through holes are formed in the connecting plate (8), and semicircular flow guide pieces (9) are arranged on the edges of the second through holes.
3. The mixed treatment device of nitrogen oxides as claimed in claim 1, characterized in that: the side wall of the mixer (2) is also provided with a plurality of spaced air inlets (10), and the air inlets (10) are arranged on one side relatively close to the nozzle (6).
4. The mixed treatment device of nitrogen oxides as claimed in claim 1, characterized in that: the utility model discloses a filter screen, including shell body (1), blender (2), outer cavity (12), outer cavity (11) and filter screen (7), outer cavity (12) set up in blender (2) below and lie in and be close to relatively and filter screen (7) one side, interior cavity (11) and outer cavity (12) communicate with blender (2) inside respectively.
5. The mixed treatment device of nitrogen oxides as claimed in claim 1, characterized in that: and flanges (13) for connection are respectively arranged at the edges of the two ends of the outer shell (1).
6. The mixed treatment device of nitrogen oxides as claimed in claim 1, characterized in that: and a fastening nut (14) for fixing is arranged at the upper end of the nozzle (6).
7. The mixed treatment device of nitrogen oxides as claimed in claim 1, characterized in that: the mixer (2) is of a cylindrical structure, and the axis of the mixer (2) is perpendicular to the axis of the outer shell (1).
CN202010815769.4A 2020-08-14 2020-08-14 Nitrogen oxide mixed treatment device Pending CN114076017A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010815769.4A CN114076017A (en) 2020-08-14 2020-08-14 Nitrogen oxide mixed treatment device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010815769.4A CN114076017A (en) 2020-08-14 2020-08-14 Nitrogen oxide mixed treatment device

Publications (1)

Publication Number Publication Date
CN114076017A true CN114076017A (en) 2022-02-22

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CN202010815769.4A Pending CN114076017A (en) 2020-08-14 2020-08-14 Nitrogen oxide mixed treatment device

Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230008192A1 (en) * 2021-07-06 2023-01-12 Proventia Oy Method in a flow device for exhaust gas aftertreatment and the flow device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230008192A1 (en) * 2021-07-06 2023-01-12 Proventia Oy Method in a flow device for exhaust gas aftertreatment and the flow device

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