CN216077273U - A blender and U type tail gas aftertreatment device for U type tail gas aftertreatment device - Google Patents
A blender and U type tail gas aftertreatment device for U type tail gas aftertreatment device Download PDFInfo
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- CN216077273U CN216077273U CN202121895270.5U CN202121895270U CN216077273U CN 216077273 U CN216077273 U CN 216077273U CN 202121895270 U CN202121895270 U CN 202121895270U CN 216077273 U CN216077273 U CN 216077273U
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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
Abstract
The utility model provides a mixer for a U-shaped tail gas post-treatment device and the U-shaped tail gas post-treatment device comprising the mixer, which prolong the heating path of air flow to urea, improve the heat utilization efficiency of tail gas, enable the urea to fully absorb heat and exert the function, and effectively reduce the risk of urea crystallization, and comprises a mixer shell, wherein the mixer shell comprises an air inlet connected with a DPF unit and an air outlet connected with an SCR unit, and a mixing cavity is arranged in the mixer shell, and the mixer is characterized in that: the mixer is characterized in that a guide plate is arranged at a position close to the air inlet in the mixer shell, a gas mixing channel is arranged in the mixing cavity, a urea nozzle is arranged on the gas mixing channel, and gas entering from the air inlet flows into the gas mixing channel through the guide plate in a guide way and flows through the gas mixing channel and then is discharged from the air outlet.
Description
Technical Field
The utility model relates to the technical field of tail gas aftertreatment devices of diesel engines, in particular to a mixer for a U-shaped tail gas aftertreatment device and the U-shaped tail gas aftertreatment device.
Background
With the implementation of the six-stage emission regulations in China, the national requirements on the emission limit value of the engine are stricter and stricter. At present, most of U-shaped after-treatment devices have limited arrangement space of the whole vehicle, and have strict requirements on the appearance structure and the space size of the whole after-treatment device, so that the arrangement space of a mixer is also limited.
For the big discharge capacity U type aftertreatment ware that DOC inlet end is located the catalyst converter below at present, the arrangement mode of nozzle mainly has two kinds: firstly, the nozzle is arranged at the air outlet end of the DPF unit, the mixing process is long, and the main defect is that urea is easy to crystallize. Secondly, the nozzle is positioned above the inlet of the mixer, the applicable space is compact, and the disadvantage is that the stroke of the mixer is short.
In the two structures, urea is not favorable for pyrolysis and hydrolysis, and the SCR conversion efficiency is low due to easy crystallization.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a mixer for a U-shaped tail gas post-treatment device and the U-shaped tail gas post-treatment device comprising the mixer, which prolong the heating path of the air flow to urea, improve the heat utilization efficiency of tail gas, fully absorb heat of urea and effectively reduce the risk of urea crystallization.
The technical scheme is as follows: a mixer for U-shaped exhaust gas aftertreatment device, includes the mixer casing, the mixer casing includes the air inlet of connecting the DPF unit and the gas outlet of connecting the SCR unit, be equipped with the mixing chamber in the mixer casing, its characterized in that: the mixer is characterized in that a guide plate is arranged at a position close to the air inlet in the mixer shell, a gas mixing channel is arranged in the mixing cavity, a urea nozzle is arranged on the gas mixing channel, and gas entering from the air inlet flows into the gas mixing channel through the guide plate in a guide way and flows through the gas mixing channel and then is discharged from the air outlet.
Further, the hybrid chamber includes the outer barrel of hybrid chamber and sets up the hybrid chamber barrel of the outer barrel central authorities of hybrid chamber, the outer barrel of hybrid chamber with connect through annular shrouding between the hybrid chamber barrel, the guide plate is followed extend to in the blender casing among the gas mixing passageway, with the outer barrel of hybrid chamber with the hybrid chamber barrel with annular shrouding constitutes together the gas mixing passageway on the hybrid chamber barrel and be located the inboard of guide plate is equipped with the breach of giving vent to anger, gets into the gas of gas mixing passageway is followed the breach of giving vent to anger gets into the inboard of hybrid chamber barrel, the inboard of hybrid chamber barrel with the gas outlet is linked together.
Further, the blender casing is including connecting the DPF unit with the SCR unit and the connecting plate of the outer barrel of hybrid chamber, the clamshell cover board is equipped with to the connecting plate upper cover, the guide plate is including being located the connecting plate with water conservancy diversion portion between the clamshell cover board and being located the clamshell cover board with passageway portion between the annular shrouding, the guide plate with the hybrid chamber in the barrel respectively with the clamshell cover board links to each other.
Further, the outside of hybrid chamber just is close to be provided with the wind channel guide plate, the one end of wind channel guide plate with the guide plate is connected, the both sides of wind channel guide plate respectively with the connecting plate and the clamshell cover plate is connected, gets into gas mixing channel's gas can warp the wind channel guide plate water conservancy diversion gets into the breach of giving vent to anger.
Furthermore, a plurality of baffles are arranged in the gas mixing channel at intervals, airflow windows are arranged on the baffles, and the baffles are positioned at the rear side of the urea nozzle.
Furthermore, baffles arranged at intervals are arranged between the annular closing plate and the clam shell cover plate in a staggered mode.
Further, the baffle is an arc baffle.
Furthermore, the airflow window is provided with fins, and the fins bend towards one side of the cylinder outside the mixing cavity.
Further, the urea nozzle is arranged obliquely towards the direction along the flow direction of the air flow.
Further, the urea nozzle is positioned at the top of the mixer.
Further, the clamshell cover plate includes a flat side.
A U-shaped exhaust gas after-treatment device is characterized by comprising the mixer for the U-shaped exhaust gas after-treatment device.
The mixer for the U-shaped tail gas aftertreatment device is characterized in that a urea nozzle is arranged at the upper part of the mixer, a clam shell structure of the mixer between a DPF unit and an SCR unit is fully utilized, the direction of exhaust gas flow is changed through the arrangement of a guide plate, the gas flow speed is effectively improved, and a flow dead zone is prevented from being stored in the clam shell; the gas mixing channel formed by the inner and outer cylinders and the guide plate in the mixing cavity increases the stroke in the mixing cavity, prolongs the heating path of the gas flow to the urea, improves the heat utilization efficiency of the tail gas and reduces the crystallization risk; in addition, still set up the baffle in gas mixing channel, be favorable to sweeping of urea crystallization, the urea atomizing is broken, is favorable to the pyrolysis hydrolysis process of urea, simultaneously, also plays the air current guide effect, through the setting of baffle, has the promotion effect to the air current velocity of flow.
Drawings
FIG. 1 is a schematic diagram of a mixer for a U-shaped exhaust gas aftertreatment device in a first view in an example;
FIG. 2 is a schematic diagram of a mixer for a U-shaped exhaust gas aftertreatment device in a second view in an example;
FIG. 3 is a schematic diagram of a mixer for a U-shaped exhaust gas aftertreatment device in an embodiment after a clamshell cover plate is hidden;
FIG. 4 is a schematic view of a U-shaped exhaust gas aftertreatment device in an embodiment.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, wherein the drawings provided in the present embodiments illustrate the basic idea of the utility model only in a schematic way, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complex.
Referring to fig. 1 to 3, the mixer for the U-shaped exhaust gas aftertreatment device of the utility model comprises a mixer housing 1, the mixer housing comprises a gas inlet 101 connected with a DPF unit and a gas outlet 102 connected with an SCR unit, a mixing chamber 2 is arranged in the mixer housing, a guide plate 3 is arranged in the mixer housing 1 at a position close to the gas inlet 101, a gas mixing channel 4 is arranged in the mixing chamber 2, a urea nozzle 5 is arranged on the gas mixing channel 4, and gas entering from the gas inlet 101 is guided by the guide plate 3 to enter the gas mixing channel 4 and is discharged from the gas outlet 102 after flowing through the gas mixing channel 4.
In this embodiment, the mixing chamber 2 includes the outer barrel 201 of mixing chamber and sets up the mixing chamber inner barrel 202 at the outer barrel 201 central authorities of mixing chamber, be connected through annular shrouding 203 between the outer barrel 201 of mixing chamber and the mixing chamber inner barrel 202, guide plate 3 extends to in the gas mixing passageway 4 from blender casing 1, constitute gas mixing passageway 4 with the outer barrel 201 of mixing chamber and mixing chamber inner barrel 202 and annular shrouding 203 together, the inboard that just is located the guide plate on the mixing chamber inner barrel 201 is equipped with air outlet notch 204, the inboard that the gas that gets into gas mixing passageway gets into the mixing chamber inner barrel 202 from air outlet notch 204, the inboard and the gas outlet 102 of mixing chamber inner barrel 202 are linked together.
In this embodiment, the mixer housing 1 includes a connection plate 103 connecting the DPF unit and the SCR unit with the outer cylinder 201 of the mixing chamber, and a clam shell cover plate 104 is covered on the connection plate 103, in this embodiment, the clam shell cover plate 104 includes a flat side surface, so that the flow rate of the exhaust gas can be increased by reducing the inner space of the mixer while saving space;
In addition, just be close to in the outside of hybrid chamber and be provided with wind channel guide plate 6, the one end of wind channel guide plate 6 is connected with guide plate 3, both sides are connected with connecting plate 103 and clamshell cover plate 104 respectively around wind channel guide plate 6, the gas that gets into gas mixing channel 4 can get into the breach 204 of giving vent to anger through wind channel guide plate 6 water conservancy diversion, the existence of wind channel guide plate 6 can seal the flow blind spot that is close to the breach 204 position department of giving vent to anger, avoid the velocity of flow of the tail gas of indiscriminate stream influence.
In this embodiment, the interval is provided with 3 baffles 7 in the gas mixing channel 4, be provided with air current window 701 on the baffle 7, baffle 7 is located the rear side of urea nozzle 5, urea nozzle 5 sets up towards the direction slope along the air current flow direction, the urea nozzle is located the top of blender, 3 baffles 7 that the interval set up misplace between annular shrouding and clamshell cover board, thereby can be perfect cover whole gas mixing channel 4, in this embodiment, baffle 7 is cowl, with gas mixing channel's shape like agreeing with, be equipped with fin 702 on air current window 701, fin 702 is buckled towards one side of mixing chamber outer barrel 201, baffle 7's setting can make urea further striking breakage, make urea and tail gas fully react.
When the mixer of the U-shaped tail gas post-treatment device is used, tail gas enters the mixer shell from the DPF unit through the gas inlet, in order to avoid the flow dead zone of the gas flow in the clam shell, the guide plate is arranged in the clam shell along the direction inclined by 40 degrees to change the direction of the exhaust gas flow, the flow separation of the gas flow is reduced, the gas flow rate is effectively improved, the over-low temperature of part of the area is avoided, and the crystallization risk is effectively reduced; tail gas quickly enters the mixing cavity through a channel between the guide plate and the clam shell cover plate, urea is sprayed into the mixing cavity from the nozzle, a gas mixing channel is formed in the mixing cavity through the mixing cavity, the outer cylinder and the guide plate, the stroke in the mixing cavity is increased, the heating path of the gas flow to the urea is prolonged, the heat utilization efficiency of the tail gas is improved, and the crystallization risk is reduced; three arc-shaped baffles are uniformly arranged in the mixing cavity along the anticlockwise direction of 40 degrees of the circumference of the mixer barrel; the atomized urea and the tail gas are crushed by the baffle plate; further abundant reaction, the gas stroke of whole mixing chamber is close a week, has prolonged the heating route of air current to urea, has improved the heat utilization efficiency of tail gas for urea fully absorbs the heat and exerts, has effectively reduced the risk of urea crystallization.
Referring to fig. 4, in addition, in an embodiment of the present invention, there is provided a U-shaped exhaust gas after-treatment device, including the mixer 1000 for a U-shaped exhaust gas after-treatment device in the above embodiment, the mixer 1000 may be assembled with the DOC unit, the DPF unit 2000, and the SCR unit 3000 in a matching manner, so as to meet the emission requirements of the nation and the sixth.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A mixer for U-shaped exhaust gas aftertreatment device, includes the mixer casing, the mixer casing includes the air inlet of connecting the DPF unit and the gas outlet of connecting the SCR unit, be equipped with the mixing chamber in the mixer casing, its characterized in that: the mixer is characterized in that a guide plate is arranged at a position close to the air inlet in the mixer shell, a gas mixing channel is arranged in the mixing cavity, a urea nozzle is arranged on the gas mixing channel, and gas entering from the air inlet flows into the gas mixing channel through the guide plate in a guide way and flows through the gas mixing channel and then is discharged from the air outlet.
2. The mixer for a U-shaped exhaust gas after-treatment device according to claim 1, characterized in that: the mixing chamber includes the outer barrel of mixing chamber and sets up the mixing chamber inner barrel of the outer barrel central authorities of mixing chamber, the outer barrel of mixing chamber with connect through annular shrouding between the mixing chamber inner barrel, the guide plate is followed extend to in the blender casing among the gas mixing passageway, with the outer barrel of mixing chamber with mixing chamber inner barrel and annular shrouding constitutes together the gas mixing passageway on the mixing chamber inner barrel and be located the inboard of guide plate is equipped with the breach of giving vent to anger, gets into gas mixing passageway's gas is followed the breach of giving vent to anger gets into the inboard of mixing chamber inner barrel, the inboard of mixing chamber inner barrel with the gas outlet is linked together.
3. The mixer for a U-shaped exhaust gas after-treatment device according to claim 2, characterized in that: the blender casing is including connecting the DPF unit with the SCR unit and the connecting plate of the outer barrel of hybrid chamber, the clamshell cover plate is equipped with to the connecting plate upper cover, the guide plate is including being located the connecting plate with water conservancy diversion portion between the clamshell cover plate and being located the clamshell cover plate with passageway portion between the annular shrouding, the guide plate with the hybrid chamber in the barrel respectively with the clamshell cover plate links to each other.
4. A mixer for U-shaped exhaust gas after-treatment devices according to claim 3, characterized in that: the outside of hybrid chamber just is close to be provided with the wind channel guide plate, the one end of wind channel guide plate with the guide plate is connected, the both sides of wind channel guide plate respectively with the connecting plate with the clamshell cover plate is connected, and the gas that gets into gas mixing passageway can be through the wind channel guide plate water conservancy diversion gets into the breach of giving vent to anger.
5. A mixer for U-shaped exhaust gas after-treatment devices according to claim 3, characterized in that: a plurality of baffles are arranged in the gas mixing channel at intervals, airflow windows are arranged on the baffles, and the baffles are positioned on the rear side of the urea nozzle.
6. The mixer for a U-shaped exhaust gas after-treatment device according to claim 5, characterized in that: the baffles arranged at intervals are arranged between the annular sealing plate and the clam shell cover plate in a staggered mode, and the baffles are arc-shaped baffles.
7. The mixer for a U-shaped exhaust gas after-treatment device according to claim 5, characterized in that: the air flow window is provided with fins, and the fins bend towards one side of the mixing cavity outer cylinder.
8. The mixer for a U-shaped exhaust gas after-treatment device according to claim 1, characterized in that: the urea nozzle is obliquely arranged along the direction of the airflow, and is positioned at the top of the mixer.
9. A mixer for U-shaped exhaust gas after-treatment devices according to claim 3, characterized in that: the clamshell cover plate includes a flat side.
10. A U-shaped exhaust gas aftertreatment device comprising a mixer for a U-shaped exhaust gas aftertreatment device according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121895270.5U CN216077273U (en) | 2021-08-13 | 2021-08-13 | A blender and U type tail gas aftertreatment device for U type tail gas aftertreatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121895270.5U CN216077273U (en) | 2021-08-13 | 2021-08-13 | A blender and U type tail gas aftertreatment device for U type tail gas aftertreatment device |
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| Publication Number | Publication Date |
|---|---|
| CN216077273U true CN216077273U (en) | 2022-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121895270.5U Active CN216077273U (en) | 2021-08-13 | 2021-08-13 | A blender and U type tail gas aftertreatment device for U type tail gas aftertreatment device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115059529A (en) * | 2022-06-30 | 2022-09-16 | 无锡威孚力达催化净化器有限责任公司 | Urea mixing arrangement |
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2021
- 2021-08-13 CN CN202121895270.5U patent/CN216077273U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115059529A (en) * | 2022-06-30 | 2022-09-16 | 无锡威孚力达催化净化器有限责任公司 | Urea mixing arrangement |
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