CN110259555A - Tail-gas after treatment apparatus - Google Patents
Tail-gas after treatment apparatus Download PDFInfo
- Publication number
- CN110259555A CN110259555A CN201910698538.7A CN201910698538A CN110259555A CN 110259555 A CN110259555 A CN 110259555A CN 201910698538 A CN201910698538 A CN 201910698538A CN 110259555 A CN110259555 A CN 110259555A
- Authority
- CN
- China
- Prior art keywords
- post
- tail
- processing unit
- gas
- treatment apparatus
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000012805 post-processing Methods 0.000 claims abstract description 49
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000004202 carbamide Substances 0.000 claims abstract description 24
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 8
- 238000010531 catalytic reduction reaction Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000000889 atomisation Methods 0.000 claims description 3
- 239000002283 diesel fuel Substances 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 239000000969 carrier Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
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
- 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
- F01N13/009—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 having two or more separate purifying devices arranged in series
-
- 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
- F01N3/10—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
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
-
- 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
- F01N2610/1486—Means to prevent the substance from freezing
Landscapes
- 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
A kind of tail-gas after treatment apparatus comprising the first post-processing unit, the second post-processing unit and mixing chamber；Second post-processing unit includes outer housing, positioned at the intracorporal second shell of the shell, Second support and the annular housing between the outer housing and the second shell；The Second support is equipped with inlet end portion and outlet end, wherein the inlet end portion is compared to the outlet end further from the mixing chamber；The tail-gas after treatment apparatus is equipped with the downstream positioned at first post-processing unit and is located at the cyclone mixer of the upstream of the mixing chamber and is mounted on the intracorporal annular mixer of the annular chamber.Compared to the prior art, inlet end portion is designed as compared to outlet end further from mixing chamber by the present invention, to increase mixing distance；In addition, annular mixer is easier to increase face area compared to existing mixer, the mixed effect of tail gas and urea droplets is improved.
Description
Technical field
The present invention relates to a kind of tail-gas after treatment apparatus, belong to motor exhaust post-processing technology field.
Background technique
Existing tail-gas after treatment apparatus generally includes the post-processing unit of several arranged in series, for example, diesel oil oxidation
Device (DOC), diesel particulate trap (DPF) and selective catalytic reduction device (SCR).In order to realize urea droplets and tail gas
Uniformly mixing, to promote pyrolysis, the hydrolysis of urea, it will usually mixer be arranged in the upstream of selective catalytic reduction device.However,
Mixer in the prior art evaluates the mixed performance of mixer often through the size of the area of its end face, to mixer
Design requirement is high.In addition, be limited to whole structure arrangement, tail gas and urea droplets is mixed in existing tail-gas after treatment apparatus
Combining diameter is shorter, is unfavorable for pyrolysis, the hydrolysis of urea.
Summary of the invention
The purpose of the present invention is to provide the tail gas that a kind of tail gas is longer with the mixed path of urea droplets and is uniformly mixed
After-treatment device.
To achieve the above object, the present invention adopts the following technical scheme: a kind of tail-gas after treatment apparatus comprising after first
Processing unit, positioned at the downstream of first post-processing unit the second post-processing unit, be located at first post-processing unit
With the mixing chamber between second post-processing unit, the mixing chamber is with so that urea nozzle is into the mixing chamber
The urea droplets of jet atomization；First post-processing unit includes first shell and is encapsulated in the first shell intracorporal
One carrier；Second post-processing unit include outer housing, positioned at the intracorporal second shell of the shell, be encapsulated in described second
The intracorporal Second support of shell and the annular housing between the outer housing and the second shell；The Second support is set
Have inlet end portion and outlet end, wherein the inlet end portion compared to the outlet end further from the mixing chamber,
One end of the annular housing is connected with the mixing chamber, and the other end of the annular housing is connected with the inlet end portion
It is logical；The tail-gas after treatment apparatus is equipped with the downstream positioned at first post-processing unit and is located at the upstream of the mixing chamber
Cyclone mixer and be mounted on the intracorporal annular mixer of the annular chamber.
Technical solution as a further improvement of that present invention, the annular mixer is close to the mixing chamber.
Technical solution as a further improvement of that present invention, the tail-gas after treatment apparatus are equipped with and are mounted on the annular chamber
The ring diversion plate in downstream that is internal and being located at the annular mixer.
Technical solution as a further improvement of that present invention, the outer housing are equipped with the water conservancy diversion towards the inlet end portion
Cover, the ring diversion plate are located at the upstream of the pod and close to the pods.
Technical solution as a further improvement of that present invention, the pod are equipped with the water conservancy diversion protruded to the inlet end portion
Protrusion.
Technical solution as a further improvement of that present invention, the second shell pass through the annular mixer, the ring
Shape mixer is fixed on the inner wall of the outer housing and is fixed on the outer wall of the second shell.
Technical solution as a further improvement of that present invention, first post-processing unit and second post-processing unit
It is arranged along a straight line or is arranged side by side or be arranged vertically.
The diameter of technical solution as a further improvement of that present invention, the outer housing is greater than the straight of the second shell
Diameter.
Technical solution as a further improvement of that present invention, first post-processing unit further include being located at described first to carry
Third carrier between body and the mixing chamber, the first vector are diesel oil oxidation device carrier, and the third carrier is bavin
Oil particles trap carrier, the Second support are selective catalytic reduction carrier.
Technical solution as a further improvement of that present invention, the Second support is including two sections and between this two sections
Gap, wherein be located at the gap in air-flow can be by the tube wall of the second shell to air-flow in the annular housing
It is heated.
Compared to the prior art, inlet end portion is designed as compared to outlet end further from mixing chamber by the present invention, from
And increase mixing distance；By setting cyclone mixer and annular mixer, each mixer itself can simplify
Design difficulty；In addition, annular mixer is easier to increase face area compared to existing mixer, tail gas and urea solution are improved
The mixed effect of drop.
Detailed description of the invention
Fig. 1 is the schematic diagram of tail-gas after treatment apparatus of the present invention in one embodiment.
Fig. 2 is the schematic diagram of tail-gas after treatment apparatus of the present invention in another embodiment.
Specific embodiment
It please join shown in Fig. 1 and Fig. 2, present invention discloses two kinds of tail-gas after treatment apparatus comprising the first post-processing unit
1, positioned at second post-processing unit 2 in the downstream of first post-processing unit 1, positioned at first post-processing unit 1 and institute
State the mixing chamber 3 between the second post-processing unit 2.The mixing chamber 3 is with so that urea nozzle 31 is to the mixing chamber 3
The urea droplets of interior jet atomization, to be mixed with tail gas.It please join shown in Fig. 1, first post-processing unit 1 and described the
Two post-processing units 2 are arranged along a straight line, at this point, the tail-gas after treatment apparatus is referred to as linear type tail-gas after treatment apparatus.
It please join shown in Fig. 2, first post-processing unit 1 is arranged side by side with second post-processing unit 2, at this point, after the tail gas
Processing unit is referred to as side-by-side type tail-gas after treatment apparatus.Certainly, in other embodiments, first post-processing unit
1 can also be arranged vertically with second post-processing unit 2.It should be noted that linear type tail-gas after treatment apparatus and should not
Ask the first post-processing unit 1 and the second post-processing unit 2 perfectly aligned, the deflection for allowing to have certain；Similarly, side-by-side type tail gas
After-treatment device is not required for the first post-processing unit 1 and is parallel to each other with the second post-processing unit 2, the angle for allowing to have certain.
In illustrative embodiments of the present invention, the flow direction of air-flow please join shown in filled arrows in tail-gas after treatment apparatus.
Second post-processing unit 2 includes outer housing 21, the second shell 22 in the outer housing 21, is encapsulated in
Second support 23 in the second shell 22 and the annular chamber between the outer housing 21 and the second shell 22
Body 20.The Second support 23 is equipped with inlet end portion 231 and outlet end 232, wherein the inlet end portion 231 is compared to institute
Outlet end 232 is stated further from the mixing chamber 3.One end of the annular housing 20 is connected with the mixing chamber 3, institute
The other end for stating annular housing 20 is connected with the inlet end portion 231.So set, the air-flow flowed out from mixing chamber 3 is first
Annular housing 20 is flowed into, and turns back and flows from inlet end portion 231, to improve the mixing distance of tail gas and urea droplets.
First post-processing unit 1 includes first shell 11 and the first vector being encapsulated in the first shell 11
12.The first shell 11 is equipped with air inlet pipe 111.In illustrative embodiments of the present invention, first post-processing unit 1 is also
Including the third carrier 13 between the first vector 12 and the mixing chamber 3, wherein the first vector 12 is bavin
Oily oxidator carrier (DOC), the third carrier 13 are diesel particulate trap carrier (DPF), and the Second support 23 is choosing
Selecting property is catalyzed reduction carrier (SCR).Preferably, the Second support 23 includes two sections and the gap between this two sections
233, wherein the air-flow being located in the gap 233 can be by the tube wall 221 of the second shell 22 to the annular housing
Air-flow is heated (shown in the dotted arrow between two sections of Second supports 23 of ginseng) in 20, reduces the risk of urea crystals.At this
In invention embodiment illustrated, the diameter of the outer housing 21 is greater than the diameter of the first shell 11.
The tail-gas after treatment apparatus is equipped with the downstream positioned at first post-processing unit 1 and is located at the mixing chamber
The cyclone mixer 4 of 3 upstream, is mounted on the annular housing 20 at the annular mixer 5 being mounted in the annular housing 20
The ring diversion plate 6 in downstream that is interior and being located at the annular mixer 5.The annular mixer 5 is close to the mixing chamber 3.
The cyclone mixer 4, can be used as primary mixer, and the tail gas will flow out the third carrier 13 forms eddy flow, with
Urea droplets can be preferably wrapped in mixing chamber 3；Annular mixer 5 close to the mixing chamber 3 can be used as
Secondary mixer, the air-flow come out from first post-processing unit 1 rotate after ring diversion plate 6, can be more preferable
Realize that tail gas is mixed with the uniform of urea droplets in ground.By the way that two-stage mixer is arranged, cyclone mixer 4 and annular can simplify
The design difficulty of mixer 5 itself；Moreover, annular mixer 5 is easier to increase face area compared to existing mixer, with
Improve the mixed effect of tail gas and urea droplets.
The outer housing 21 is equipped with the pod 24 towards the inlet end portion 231, and the ring diversion plate 6 is located at described
The upstream of pod 24 and the close pod 24.The pod 24 is equipped with the water conservancy diversion protruded to the inlet end portion 231
Protrusion 241.The ring diversion plate 6 can play certain rectified action, in order to match with pod 24, equably will
Distribution of air flow is to inlet end portion 231.
In illustrative embodiments of the present invention, the second shell 22 pass through and be erected at the annular mixer 5 with
And on ring diversion plate 6, the annular mixer 5 is each attached on the inner wall of the outer housing 21 with the ring diversion plate 6
And it is fixed on the outer wall of the second shell 22.So set, can use annular mixer 5 and ring diversion plate 6 is right
Second shell 22 is fixed.
The tail-gas after treatment apparatus is equipped with to broken and shunt the broken flow distribution plates 7 of the urea droplets, and described the
Two shells 22 are equipped with the outlet cavity 70 between the broken flow distribution plate 7 and the outlet end 231.After the tail gas
Reason device is equipped with the escape pipe 8 being connected with the outlet cavity 70.The broken flow distribution plate 7 is equipped with and is exposed to the mixing chamber
Front 71 in body 3 and the back side 72 being exposed in the outlet cavity 70.The broken flow distribution plate 7 has to described first
The arc convex 73 of carrier 12 protrusion.So set, the urea droplets to gush out from urea nozzle 31 can be in broken flow distribution plate 7
Upper further occurrence is broken, smaller particle is made, convenient for the evaporation of urea；Arc convex 73 is conducive to tail gas and urine
The mixed airflow of plain drop is radially outward to be evenly distributed in annular housing 20.The front 71 of broken flow distribution plate 7 is exposed to
In mixing chamber 3, so as to be heated using the heat of the outlet tail gas of the first post-processing unit 1 to front 71, reduce
The risks of urea crystals is caused because surface temperature is too low；In addition, by importing the air-flow of 8 front end of escape pipe, so as to
Enough the back side 72 of broken flow distribution plate 7 is heated using the heat of the outlet tail gas of the second post-processing unit 2, is further increased
The temperature of broken flow distribution plate 7, reduces urea crystals risk.
Above embodiments are merely to illustrate the present invention and not limit the technical scheme described by the invention, to this specification
Understanding should based on person of ordinary skill in the field, although this specification referring to the above embodiments to the present invention
Detailed description is had been carried out, still, those skilled in the art should understand that, person of ordinary skill in the field is still
Can so modify or equivalently replace the present invention, and all do not depart from the spirit and scope of the present invention technical solution and
It is improved, and should all be covered in scope of the presently claimed invention.
Claims (10)
1. a kind of tail-gas after treatment apparatus comprising the first post-processing unit, positioned at the downstream of first post-processing unit
Second post-processing unit, the mixing chamber between first post-processing unit and second post-processing unit, it is described
Urea droplets of the mixing chamber for urea nozzle jet atomization into the mixing chamber；The first post-processing unit packet
It includes first shell and is encapsulated in the intracorporal first vector of the first shell；It is characterized by: the second post-processing unit packet
Include outer housing, positioned at the intracorporal second shell of the shell, be encapsulated in the intracorporal Second support of the second shell and be located at institute
State the annular housing between outer housing and the second shell；The Second support is equipped with inlet end portion and outlet end,
Described in inlet end portion compared to the outlet end further from the mixing chamber, one end of the annular housing and described mixed
It closes cavity to be connected, the other end of the annular housing is connected with the inlet end portion；The tail-gas after treatment apparatus is equipped with
Positioned at first post-processing unit downstream and be located at the mixing chamber upstream cyclone mixer and be mounted on institute
State the intracorporal annular mixer of annular chamber.
2. tail-gas after treatment apparatus as described in claim 1, it is characterised in that: the annular mixer is close to the mixing chamber
Body.
3. tail-gas after treatment apparatus as described in claim 1, it is characterised in that: the tail-gas after treatment apparatus is equipped with and is mounted on
The ring diversion plate in the downstream in the annular housing and positioned at the annular mixer.
4. tail-gas after treatment apparatus as claimed in claim 3, it is characterised in that: the outer housing is equipped with towards the arrival end
The pod in portion, the ring diversion plate are located at the upstream of the pod and close to the pods.
5. tail-gas after treatment apparatus as claimed in claim 4, it is characterised in that: the pod is equipped with to the inlet end portion
The water conservancy diversion protrusion of protrusion.
6. tail-gas after treatment apparatus as described in claim 1, it is characterised in that: the second shell passes through the annular mixing
Device, the annular mixer are fixed on the inner wall of the outer housing and are fixed on the outer wall of the second shell.
7. tail-gas after treatment apparatus as described in claim 1, it is characterised in that: first post-processing unit and described second
Post-processing unit is arranged along a straight line or is arranged side by side or is arranged vertically.
8. tail-gas after treatment apparatus as claimed in claim 7, it is characterised in that: the diameter of the outer housing is greater than described second
The diameter of shell.
9. tail-gas after treatment apparatus as described in claim 1, it is characterised in that: first post-processing unit further includes being located at
Third carrier between the first vector and the mixing chamber, the first vector are diesel oil oxidation device carrier, described the
Three carriers are diesel particulate trap carrier, and the Second support is selective catalytic reduction carrier.
10. tail-gas after treatment apparatus as described in claim 1, it is characterised in that: the Second support include two sections and
Gap between this two sections, wherein the air-flow being located in the gap can be by the tube wall of the second shell to the ring
Air-flow is heated in shape cavity.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910698538.7A CN110259555A (en) | 2019-07-31 | 2019-07-31 | Tail-gas after treatment apparatus |
| PCT/CN2020/106038 WO2021018265A1 (en) | 2019-07-31 | 2020-07-31 | Exhaust gas post-treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910698538.7A CN110259555A (en) | 2019-07-31 | 2019-07-31 | Tail-gas after treatment apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110259555A true CN110259555A (en) | 2019-09-20 |
Family
ID=67912482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910698538.7A Pending CN110259555A (en) | 2019-07-31 | 2019-07-31 | Tail-gas after treatment apparatus |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110259555A (en) |
| WO (1) | WO2021018265A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021018265A1 (en) * | 2019-07-31 | 2021-02-04 | 天纳克（苏州）排放系统有限公司 | Exhaust gas post-treatment device |
| WO2021018266A1 (en) * | 2019-07-31 | 2021-02-04 | 天纳克（苏州）排放系统有限公司 | Exhaust gas aftertreatment device |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021018265A1 (en) * | 2019-07-31 | 2021-02-04 | 天纳克（苏州）排放系统有限公司 | Exhaust gas post-treatment device |
| WO2021018266A1 (en) * | 2019-07-31 | 2021-02-04 | 天纳克（苏州）排放系统有限公司 | Exhaust gas aftertreatment device |
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| Publication number | Publication date |
|---|---|
| WO2021018265A1 (en) | 2021-02-04 |
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