CN204312165U - Engine exhaust after-treatment system - Google Patents
Engine exhaust after-treatment system Download PDFInfo
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- CN204312165U CN204312165U CN201420809032.1U CN201420809032U CN204312165U CN 204312165 U CN204312165 U CN 204312165U CN 201420809032 U CN201420809032 U CN 201420809032U CN 204312165 U CN204312165 U CN 204312165U
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- mixer
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- treatment system
- engine exhaust
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Abstract
A kind of engine exhaust after-treatment system, it connection part comprising the first aftertreatment assembly, the second aftertreatment assembly and first, second aftertreatment assembly described is together in series.Described connection part comprises the guide shell being positioned at described first housing side and the mixer tube assembly matched with described guide shell.The mixing tube that described mixer tube assembly comprises mixer and is connected with described mixer.Described mixer cylindrically, the inner chamber body that described mixer comprises hollow, be centered around described inner chamber body periphery and the some fins circumferentially distributed, the some flutings be communicated with corresponding to described some fins and with described inner chamber body and the side that is positioned at described fin and away from some perforates of described second import.The utility model can play good pressure stabilization function by arranging guide shell, and described mixer can form eddy flow, is beneficial to realize Homogeneous phase mixing.
Description
Technical field
The utility model relates to a kind of engine exhaust after-treatment system.
Background technique
Engine exhaust after-treatment system (such as diesel exhaust aftertreatment system) is mainly used for processing or evolve the device of poisonous and harmful matter in exhaust.Harmful toxic matter in exhaust mainly comprises hydrocarbon, carbon monoxide, nitrogen oxide and particulate matter etc.
The scheme adopting oxidized form catalyst (DOC), grain catcher (DPF) and selective catalytic reducing agent (SCR) combined has been had to improve the usefulness of vent gas treatment in prior art.In a kind of scheme, described oxidized form catalyst and grain catcher are arranged in series in the first housing; Described selective catalytic reducing agent is arranged in the second housing; Then by connecting tube, first, second housing described is together in series.
But, how to enable tail gas in described connecting tube with atomization after urea liquid to carry out Homogeneous phase mixing be industry technical problem urgently to be resolved hurrily.
Model utility content
The purpose of this utility model is to provide a kind of tail gas and urea liquid after being atomized of can making to carry out mixed uniformly engine exhaust after-treatment system.
For achieving the above object, the utility model adopts following technological scheme: a kind of engine exhaust after-treatment system, and it comprises the first aftertreatment assembly, the second aftertreatment assembly of being arranged side by side with described first aftertreatment assembly and the connection part be together in series by first, second aftertreatment assembly described; Described first aftertreatment assembly comprises the first housing, the grain catcher be installed in described first housing, be positioned at described grain catcher upstream the first import and be positioned at described grain catcher downstream first outlet; Described second aftertreatment assembly comprises the second housing, the selective catalytic reducing agent be installed in described second housing, be positioned at described selective catalytic reducing agent upstream the second import and be positioned at described selective catalytic reducing agent downstream second outlet; Described connection part comprises the guide shell being positioned at described first housing side and the mixer tube assembly matched with described guide shell; Described guide shell is provided with the first cavity being positioned at bottom and the second cavity being positioned at top, and wherein said first cavity and described first exports and is connected, and the volume of described first cavity is greater than the volume of described second cavity; Described mixer tube assembly comprises the mixer being positioned at described second cavity and the mixing tube be connected with described mixer, and described mixing tube is away from one end of described mixer and described second inlet communication; Described mixer cylindrically, the inner chamber body that described mixer comprises hollow, be centered around described inner chamber body periphery and the some fins circumferentially distributed, the some flutings be communicated with corresponding to described some fins and with described inner chamber body and the side that is positioned at described fin and away from some perforates of described second import; Described connection part is also provided with the nozzle mounting portion corresponding to described inner chamber body, and described nozzle mounting portion is near described some perforates.
As the technological scheme that the utility model improves further, described fluting is formed by after fin described in punching press, and described perforate is uniformly distributed circumferentially the periphery in described inner chamber body.
As the technological scheme that the utility model improves further, described guide shell is in tilted layout, and described second cavity is positioned at the oblique upper of described first cavity.
As the technological scheme that the utility model improves further, described guide shell comprises inwall, outer wall and connects the midfeather of described inwall and described outer wall, and wherein said midfeather comprises the first arc surface being positioned at the oblique below of described first cavity, the second arc surface being positioned at described second cavity oblique upper and connects two inclined-planes of first, second arc surface described.
As the technological scheme that the utility model improves further, described guide shell comprises inwall, outer wall and connects the midfeather of described inwall and described outer wall, wherein said inwall is double layer construction, and it comprises the first inwall, the second inwall and is clamped in the heat insulation foam between first, second inwall described; Described outer wall is double layer construction, and it comprises the first outer wall, the second outer wall and is clamped in the heat insulation foam between first, second outer wall described; Described midfeather is double layer construction, and it comprises the first midfeather, the second midfeather and is clamped in the heat insulation foam between first, second midfeather described.
As the technological scheme that the utility model improves further, described mixer and described mixing tube are formed by same pipe.
As the technological scheme that the utility model improves further, described first outer wall is provided with the flange of the first mounting hole and outwardly described first mounting hole; Described second outer wall is provided with second mounting hole corresponding with described first mounting hole, and described flange is fastened in the inner side of described second mounting hole; The outside of described mixer is positioned in described first mounting hole.
As the technological scheme that the utility model improves further, described first housing, the second housing and mixing tube are parallel to each other, and described mixing tube is positioned at the top of first, second housing described.
As the technological scheme that the utility model improves further, described connection part is provided with the cylindrical shell being inserted in described second housing, described cylindrical shell is the cylindric of hollow, described cylindrical shell is non-porous structure towards the side of described selective catalytic reducing agent, and the side of described cylindrical shell described selective catalytic reducing agent is dorsad provided with some pores.
As the technological scheme that the utility model improves further, described second aftertreatment assembly is in the downstream of described selective catalytic reducing agent and the position of close described second outlet is provided with the dividing plate be fixed in described second housing, and described dividing plate is provided with some perforation.
Compared to prior art, the utility model can play good pressure stabilization function by arranging guide shell, slows down, be beneficial to realize Homogeneous phase mixing to from described first aftertreatment assembly tail gas out.In addition, the volume of the first cavity is set to the volume being greater than described second cavity, can to the effect promoting flow-disturbing.The urea liquid gushed out from nozzle is surrounded by the tail gas of vortex in the inner chamber body of described mixer, thus avoids urea directly and contact internal walls, reduces the risk of crystallization.The tail gas of vortex can improve the uniformity carrying out with the urea liquid of atomization mixing, thus improves the efficiency of vent gas treatment.
Accompanying drawing explanation
Fig. 1 is the schematic perspective view of the utility model engine exhaust after-treatment system.
Fig. 2 is the schematic perspective view of another angle of Fig. 1.
Fig. 3 is the part isometric exploded view of Fig. 2.
Fig. 4 is the further three-dimensional exploded view of Fig. 3.
Fig. 5 is the schematic perspective view of connection part in Fig. 2.
Fig. 6 is the three-dimensional exploded view of Fig. 5.
Fig. 7 is the partial perspective cross-sectional figure along A-A line in Fig. 2.
Fig. 8 is the partial perspective cross-sectional figure along B-B line in Fig. 1.
Fig. 9 is the sectional view along C-C line in Fig. 2.
Figure 10 is the sectional view along D-D line in Fig. 2.
Figure 11 is the sectional view along E-E line in Fig. 2.
Embodiment
Shown in please refer to the drawing 1 and Fig. 2, the utility model discloses a kind of engine exhaust after-treatment system 100, and it comprises the first aftertreatment assembly 1, the second aftertreatment assembly 2 of being arranged side by side with described first aftertreatment assembly 1 and the connection part 3 be together in series by first, second aftertreatment assembly 1,2 described.
Described first aftertreatment assembly 1 comprises the first housing 11, the oxidized form catalyst (DOC) 12 be installed in described first housing 11, the grain catcher (DPF) 13 be installed in described first housing 11, be positioned at described oxidized form catalyst 12 upstream the first import 14 and be positioned at described grain catcher 13 downstream first outlet 15.Wherein, described oxidized form catalyst 12 is positioned at the upstream of described grain catcher 13, to provide suitable temperature when described grain catcher 13 regenerates.
Described second aftertreatment assembly 2 comprises the second housing 21, the selective catalytic reducing agent 22 be installed in described second housing 21, be positioned at described selective catalytic reducing agent 22 upstream the second import 23 and be positioned at described selective catalytic reducing agent 22 downstream second outlet 24.
Shown in please refer to the drawing 3 to Figure 11, described connection part 3 comprises the guide shell 4 being arranged in described first housing 11 side (be left side at the mode of execution of Fig. 2) and the mixer tube assembly 5 matched with described guide shell 4.Described guide shell 4 is provided with the first cavity 41 being positioned at bottom, the second cavity 42 being positioned at top, inwall 43, outer wall 44 and connects the midfeather 45 of described inwall 43 and described outer wall 44, wherein said first cavity 41 and described first exports 15 and is connected, and the volume of described first cavity 41 is greater than the volume of described second cavity 42.In addition, shown in please refer to the drawing 9, described midfeather 45 comprises the first arc surface 451 being positioned at the oblique below of described first cavity 41, the second arc surface 452 being positioned at described second cavity 42 oblique upper and connects two inclined-planes 453 of first, second arc surface 451,452 described.In the illustrated mode of execution of the utility model, described guide shell 4 is in tilted layout, and described second cavity 42 is positioned at the oblique upper of described first cavity 41.Described inclined-plane 453 can play good guide functions.
During use, first enter from described first import 14 from motor tail gas out, then successively through described oxidized form catalyst 12 and described grain catcher 13, then enter in described guide shell 4 from described first outlet 15.Inventor finds after a large amount of experimental analyses, and the flowing velocity of tail gas in described first aftertreatment assembly 1 is very fast, is unfavorable for Homogeneous phase mixing.And by arranging guide shell 4 in the end of described first aftertreatment assembly 1, enter in a relatively large space from described grain catcher 13 tail gas out, its flowing velocity will inevitably reduce, thus is conducive to carrying out Homogeneous phase mixing quickly.In addition, described guide shell 4 can play the pressure stabilization function of similar water tank.
In order to reduce noise and realize insulation, described inwall 43 is double layer construction, and it comprises the first inwall 431, second inwall 432 and is clamped in the heat insulation foam (not shown) between first, second inwall 431,432 described; Described outer wall 44 is double layer construction, and it comprises the first outer wall 441, second outer wall 442 and is clamped in the heat insulation foam (not shown) between first, second outer wall 441,442 described; Described midfeather 45 is double layer construction, and it comprises the first midfeather 454, second midfeather 455 and is clamped in the heat insulation foam (not shown) between first, second midfeather 454,455 described.The double layer construction that therebetween holds heat insulation foam possesses certain elasticity, can receive noise, improves the durability of product simultaneously.
Described mixer tube assembly 5 comprises the mixer 6 being positioned at described second cavity 42 and the mixing tube 7 be connected with described mixer 6.Described mixer 6 cylindrically, it inner chamber body 61 comprising hollow, be centered around described inner chamber body 61 periphery and the some fins 62 circumferentially distributed, the some flutings 63 be communicated with corresponding to described some fins 62 and with described inner chamber body 61 and the side that is positioned at described fin 62 and away from some perforates 64 of described second import 23.In the illustrated mode of execution of the utility model, described fluting 63 is formed by after fin described in punching press 62, and described perforate 64 is uniformly distributed circumferentially the periphery in described inner chamber body 61.Shown in please refer to the drawing 9, described fin 62 along certain angular array, thus after making tail gas pass described fluting 63, can form good eddy current in described inner chamber body 61.
Shown in please refer to the drawing 3 and Fig. 7, described first outer wall 441 is provided with the flange 4412 of the first mounting hole 4411 and outwardly described first mounting hole 4411; Described second outer wall 442 is provided with second mounting hole 4421 corresponding with described first mounting hole 4411.During assembling, described flange 4412 is fastened in the inner side of described second mounting hole 4421, and the outside of described mixer 6 is positioned in described first mounting hole 4411.
Shown in please refer to the drawing 2 to Fig. 6, described connection part 3 is also provided with the nozzle mounting portion 8 corresponding to described inner chamber body 61.The urea liquid of atomization directly sprays in described inner chamber body 61 by nozzle.In the illustrated mode of execution of the utility model, described nozzle mounting portion 8 is near described some perforates 64.Due to from described nozzle ejection urea liquid out, easily form dead band in the position away from spout, easily cause crystallization, after adopting scheme of the present utility model, the urea liquid of this position can flow out from described perforate 64, thus reduces the risk of urea crystals.
Shown in please refer to the drawing 4 to Fig. 8, in the illustrated mode of execution of the utility model, described mixer 6 is integral type structure with described mixing tube 7, and namely the two is formed by same pipe.Described first housing 11, second housing 21 and mixing tube 7 are parallel to each other, and described mixing tube 7 is positioned at the top of first, second housing 11,21 described.Described mixing tube 7 is communicated with described second import 23 away from one end of described mixer 6.
During use, the urea liquid gushed out from nozzle is surrounded by the tail gas of vortex in the inner chamber body 61 of described mixer 6, thus avoids urea directly and contact internal walls, reduces the risk of crystallization.The tail gas of vortex can improve the uniformity carrying out with the urea liquid of atomization mixing, thus improves the efficiency of vent gas treatment, enables scheme of the present utility model meet the requirement of stricter Abgasgesetz.
In addition, shown in please refer to the drawing 11, described connection part 3 is provided with the cylindrical shell 25 being inserted in described second housing 21.Cylindric in hollow of described cylindrical shell 25, described cylindrical shell 25 is non-porous structure towards the side of described selective catalytic reducing agent 22, and the side of described cylindrical shell 25 described selective catalytic reducing agent 22 is dorsad provided with some pores 251.Setting like this, can increase mixing distance, improves the uniformity of mixing.
Described second aftertreatment assembly 2 is in the downstream of described selective catalytic reducing agent 22 and the position of close described second outlet 24 is provided with the dividing plate 26 be fixed in described second housing 21.Described dividing plate 26 is provided with some perforation 261, to play the effect of noise elimination.
Compared to prior art, this practical habit is optimized thin portion structure, improves the uniformity of mixing, reduces the risk of urea crystals.
In addition, the technological scheme of above embodiment only for illustration of the utility model and described by unrestricted the utility model, understanding of this description should based on person of ordinary skill in the field, such as " front and back are run through " refers to and did not run through before installing other parts, again such as to " front ", " afterwards ", " left side ", " right side ", " on ", the description of D score isotropy, although this specification has been described in detail the utility model with reference to the above embodiments, but, those of ordinary skill in the art is to be understood that, person of ordinary skill in the field still can modify to the utility model or equivalent replacement, and all do not depart from technological scheme and the improvement thereof of spirit and scope of the present utility model, all should be encompassed in right of the present utility model.
Claims (10)
1. an engine exhaust after-treatment system, it comprises the first aftertreatment assembly, the second aftertreatment assembly of being arranged side by side with described first aftertreatment assembly and the connection part be together in series by first, second aftertreatment assembly described; Described first aftertreatment assembly comprises the first housing, the grain catcher be installed in described first housing, be positioned at described grain catcher upstream the first import and be positioned at described grain catcher downstream first outlet; Described second aftertreatment assembly comprises the second housing, the selective catalytic reducing agent be installed in described second housing, be positioned at described selective catalytic reducing agent upstream the second import and be positioned at described selective catalytic reducing agent downstream second outlet; It is characterized in that: described connection part comprises the guide shell being positioned at described first housing side and the mixer tube assembly matched with described guide shell; Described guide shell is provided with the first cavity being positioned at bottom and the second cavity being positioned at top, and wherein said first cavity and described first exports and is connected, and the volume of described first cavity is greater than the volume of described second cavity; Described mixer tube assembly comprises the mixer being positioned at described second cavity and the mixing tube be connected with described mixer, and described mixing tube is away from one end of described mixer and described second inlet communication; Described mixer cylindrically, the inner chamber body that described mixer comprises hollow, be centered around described inner chamber body periphery and the some fins circumferentially distributed, the some flutings be communicated with corresponding to described some fins and with described inner chamber body and the side that is positioned at described fin and away from some perforates of described second import; Described connection part is also provided with the nozzle mounting portion corresponding to described inner chamber body, and described nozzle mounting portion is near described some perforates.
2. engine exhaust after-treatment system as claimed in claim 1, it is characterized in that: described fluting is formed by after fin described in punching press, described perforate is uniformly distributed circumferentially the periphery in described inner chamber body.
3. engine exhaust after-treatment system as claimed in claim 1, it is characterized in that: described guide shell is in tilted layout, described second cavity is positioned at the oblique upper of described first cavity.
4. engine exhaust after-treatment system as claimed in claim 3, it is characterized in that: described guide shell comprises inwall, outer wall and connects the midfeather of described inwall and described outer wall, wherein said midfeather comprises the first arc surface being positioned at the oblique below of described first cavity, the second arc surface being positioned at described second cavity oblique upper and connects two inclined-planes of first, second arc surface described.
5. engine exhaust after-treatment system as claimed in claim 3, it is characterized in that: described guide shell comprises inwall, outer wall and connects the midfeather of described inwall and described outer wall, wherein said inwall is double layer construction, and it comprises the first inwall, the second inwall and is clamped in the heat insulation foam between first, second inwall described; Described outer wall is double layer construction, and it comprises the first outer wall, the second outer wall and is clamped in the heat insulation foam between first, second outer wall described; Described midfeather is double layer construction, and it comprises the first midfeather, the second midfeather and is clamped in the heat insulation foam between first, second midfeather described.
6. engine exhaust after-treatment system as claimed in claim 5, is characterized in that: described mixer and described mixing tube are formed by same pipe.
7. engine exhaust after-treatment system as claimed in claim 5, is characterized in that: described first outer wall is provided with the flange of the first mounting hole and outwardly described first mounting hole; Described second outer wall is provided with second mounting hole corresponding with described first mounting hole, and described flange is fastened in the inner side of described second mounting hole; The outside of described mixer is positioned in described first mounting hole.
8. engine exhaust after-treatment system as claimed in claim 1, is characterized in that: described first housing, the second housing and mixing tube are parallel to each other, and described mixing tube is positioned at the top of first, second housing described.
9. engine exhaust after-treatment system as claimed in claim 1, it is characterized in that: described connection part is provided with the cylindrical shell being inserted in described second housing, described cylindrical shell is the cylindric of hollow, described cylindrical shell is non-porous structure towards the side of described selective catalytic reducing agent, and the side of described cylindrical shell described selective catalytic reducing agent is dorsad provided with some pores.
10. engine exhaust after-treatment system as claimed in claim 1, it is characterized in that: described second aftertreatment assembly is in the downstream of described selective catalytic reducing agent and the position of close described second outlet is provided with the dividing plate be fixed in described second housing, and described dividing plate is provided with some perforation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420809032.1U CN204312165U (en) | 2014-12-19 | 2014-12-19 | Engine exhaust after-treatment system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420809032.1U CN204312165U (en) | 2014-12-19 | 2014-12-19 | Engine exhaust after-treatment system |
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| CN204312165U true CN204312165U (en) | 2015-05-06 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437967A (en) * | 2016-10-24 | 2017-02-22 | 无锡威孚力达催化净化器有限责任公司 | Honeycomb type rotational flow urea mixing device |
| CN106437968A (en) * | 2016-10-24 | 2017-02-22 | 无锡威孚力达催化净化器有限责任公司 | Integrated wavy type rotational flow urea mixing device |
| WO2017032231A1 (en) * | 2015-08-21 | 2017-03-02 | 天纳克（苏州）排放系统有限公司 | Exhaust gas treatment apparatus |
| CN106523092A (en) * | 2016-10-24 | 2017-03-22 | 无锡威孚力达催化净化器有限责任公司 | Two-blade conical surface type cyclone urea mixing device |
| CN106894870A (en) * | 2015-12-18 | 2017-06-27 | 天纳克（苏州）排放系统有限公司 | Exhaust post-treatment apparatus of engine |
| CN107255043A (en) * | 2017-07-27 | 2017-10-17 | 天纳克（苏州）排放系统有限公司 | Engine exhaust post processing encapsulation and application |
| CN107366566A (en) * | 2016-05-13 | 2017-11-21 | 天纳克（苏州）排放系统有限公司 | Engine exhaust aftertreatment assembly |
| CN108412593A (en) * | 2018-04-13 | 2018-08-17 | 无锡威孚力达催化净化器有限责任公司 | A kind of parallel tube type post-processing structural assembly |
| CN109404103A (en) * | 2016-06-03 | 2019-03-01 | 天纳克（苏州）排放系统有限公司 | Mixing arrangement |
| WO2019144602A1 (en) * | 2018-01-26 | 2019-08-01 | 天纳克（苏州）排放系统有限公司 | Exhaust aftertreatment device |
| CN115053053A (en) * | 2019-12-03 | 2022-09-13 | 康明斯排放处理公司 | Reductant delivery system for an exhaust aftertreatment system |
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2014
- 2014-12-19 CN CN201420809032.1U patent/CN204312165U/en active Active
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017032231A1 (en) * | 2015-08-21 | 2017-03-02 | 天纳克（苏州）排放系统有限公司 | Exhaust gas treatment apparatus |
| CN106894870A (en) * | 2015-12-18 | 2017-06-27 | 天纳克（苏州）排放系统有限公司 | Exhaust post-treatment apparatus of engine |
| CN107366566A (en) * | 2016-05-13 | 2017-11-21 | 天纳克（苏州）排放系统有限公司 | Engine exhaust aftertreatment assembly |
| CN109404103A (en) * | 2016-06-03 | 2019-03-01 | 天纳克（苏州）排放系统有限公司 | Mixing arrangement |
| CN106523092A (en) * | 2016-10-24 | 2017-03-22 | 无锡威孚力达催化净化器有限责任公司 | Two-blade conical surface type cyclone urea mixing device |
| CN106437967A (en) * | 2016-10-24 | 2017-02-22 | 无锡威孚力达催化净化器有限责任公司 | Honeycomb type rotational flow urea mixing device |
| CN106437968A (en) * | 2016-10-24 | 2017-02-22 | 无锡威孚力达催化净化器有限责任公司 | Integrated wavy type rotational flow urea mixing device |
| CN106437967B (en) * | 2016-10-24 | 2019-03-19 | 无锡威孚力达催化净化器有限责任公司 | Honeycomb type eddy flow urea mixing device |
| CN106523092B (en) * | 2016-10-24 | 2019-04-23 | 无锡威孚力达催化净化器有限责任公司 | The conical surface type eddy flow urea mixing devices of page two |
| CN106437968B (en) * | 2016-10-24 | 2019-06-28 | 无锡威孚力达催化净化器有限责任公司 | Integrated wave eddy flow urea mixing device |
| CN107255043A (en) * | 2017-07-27 | 2017-10-17 | 天纳克（苏州）排放系统有限公司 | Engine exhaust post processing encapsulation and application |
| WO2019144602A1 (en) * | 2018-01-26 | 2019-08-01 | 天纳克（苏州）排放系统有限公司 | Exhaust aftertreatment device |
| CN108412593A (en) * | 2018-04-13 | 2018-08-17 | 无锡威孚力达催化净化器有限责任公司 | A kind of parallel tube type post-processing structural assembly |
| CN115053053A (en) * | 2019-12-03 | 2022-09-13 | 康明斯排放处理公司 | Reductant delivery system for an exhaust aftertreatment system |
| CN115053053B (en) * | 2019-12-03 | 2023-06-13 | 康明斯排放处理公司 | Reducing agent delivery system for exhaust aftertreatment system |
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