CN112459880A - Urea mixing turbulence crushing structure for aftertreatment - Google Patents
Urea mixing turbulence crushing structure for aftertreatment Download PDFInfo
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- CN112459880A CN112459880A CN202110066089.1A CN202110066089A CN112459880A CN 112459880 A CN112459880 A CN 112459880A CN 202110066089 A CN202110066089 A CN 202110066089A CN 112459880 A CN112459880 A CN 112459880A
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- Prior art keywords
- stainless steel
- cylinder
- net
- heat
- cover
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Classifications
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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
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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
- F01N3/18—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]
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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
- 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
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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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
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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
- 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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- 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
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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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention relates to a urea mixing turbulence crushing structure for post-treatment, wherein a bell-mouth cylinder covers the outer side of a heat-insulation inner-layer cylinder, and a front partition plate is arranged between the bell-mouth cylinder and the heat-insulation inner-layer cylinder; a nozzle seat is arranged on the arc-shaped surface of the horn-mouth cylinder through a nozzle seat supporting base; the rotational flow blade pipe is welded with the stainless steel pipe and then radially penetrates through and is welded with the inner-layer cylinder; the spherical plug cover is arranged at one end of the heat-insulation inner side cylinder body; the spoiler is respectively welded with the horn mouth cylinder and the spherical plug cover; the stainless steel winding net is connected in the stainless steel pipe in a brazing mode; and the upper side and the lower side of the stainless steel winding net are respectively provided with a front cross net cover and a rear cross net cover. The invention not only can ensure that the urea and the automobile exhaust are fully mixed, but also has obvious effect on the aspect of urea crystallization resistance, and solves the problem of urea crystallization after national six post-treatment of diesel engines.
Description
Technical Field
The invention belongs to the technical fields of exhaust emission purification technology and energy conservation and consumption reduction of automobile engines, and particularly relates to a urea mixing turbulent flow crushing structure for aftertreatment.
Background
The technical routes of the current national heavy diesel engine are that an oxidation catalytic unit (DOC)/a particle capture unit (DPF)/a selective catalytic reduction conversion unit (SCR) and an ammonia oxidation catalytic unit (ASC) are combined in series, and most of the national five diesel engines only contain the selective catalytic reduction conversion unit (SCR), so that the national six aftertreatment is more complex than the national five mixed structure, and the requirement on urea crystallization resistance is higher.
Disclosure of Invention
The invention provides a urea mixing turbulence crushing structure for aftertreatment, which not only can ensure that urea and automobile exhaust are fully mixed, but also has a remarkable effect on the aspect of urea crystallization resistance, and solves the problem of urea crystallization in diesel engine national six aftertreatment.
The technical scheme adopted by the invention is as follows: a urea mixing turbulence crushing structure for aftertreatment comprises a bell mouth cylinder, a heat preservation inner layer cylinder, a rotational flow blade pipe, a stainless steel winding net, a stainless steel pipe, a nozzle seat, a spherical plug cover and a spoiler; the horn mouth cylinder covers the outer side of the heat-insulation inner-layer cylinder, and a front partition plate is arranged between the horn mouth cylinder and the heat-insulation inner-layer cylinder; a nozzle seat is arranged on the arc-shaped surface of the horn-mouth cylinder through a nozzle seat supporting base; the rotational flow blade pipe is welded with the stainless steel pipe and then radially penetrates through and is welded with the inner-layer cylinder; the spherical plug cover is arranged at one end of the heat-insulation inner side cylinder body; the spoiler is respectively welded with the horn mouth cylinder and the spherical plug cover; the stainless steel winding net is connected in the stainless steel pipe in a brazing mode; and the upper side and the lower side of the stainless steel winding net are respectively provided with a front cross net cover and a rear cross net cover.
Further, the stainless steel winding net is formed by winding a cylindrical stainless steel wire net after wavy indentation.
Further, the front cross net cover and the rear cross net cover are all formed by weaving cylindrical stainless steel wires in a criss-cross mode.
Furthermore, a temperature sensor base and a differential pressure sensor base are arranged on the horn mouth cylinder body.
The invention has the following beneficial effects: the front cross net cover structure adopted by the invention can integrate urea and tail gas, so that the urea and the tail gas uniformly pass through the stainless steel winding net structure; compared with the traditional structure, the stainless steel winding structure can increase the contact area and accelerate the evaporation and hydrolysis of urea; the rear cross net cover structure can integrate the air flow passing through the stainless steel winding structure; so that the airflow uniformly flows out of the mixed turbulent flow crushing structure; the SCR front-end flow field uniformity can be improved.
Drawings
FIG. 1 is a schematic view of the mixing structure in general;
FIG. 2 is an exploded schematic view of a hybrid structure;
FIG. 3 is a first schematic exploded view of the hybrid structure;
FIG. 4 is a second schematic exploded view of the interior of the hybrid structure;
FIG. 5 is a first schematic exploded view of the interior of the structure;
FIG. 6 is a schematic diagram of a second exploded view of the interior of the hybrid turbulent flow crushing structure;
FIG. 7 is an overall view of a stainless steel winding net and a stainless steel pipe;
in the figure: 10-a horn mouth cylinder body, 20-a heat preservation inner layer cylinder body, 30-a front partition plate, 40-a rotational flow blade pipe, 50-a stainless steel winding net, 51-a stainless steel pipe, 52-a front cross net cover, 53-a rear cross net cover, 60-a nozzle seat supporting base, 70-a nozzle seat, 80-a spherical plug cover, 90-a spoiler, 100-a temperature sensor base and 110-a differential pressure sensor base.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
The invention relates to a urea mixing turbulent flow crushing structure for aftertreatment. As shown in fig. 1 to 4, the present invention includes a bell-mouthed cylinder 10, a heat-insulating inner-layer cylinder 20, a front partition 30, a swirl vane tube 40, a stainless steel winding mesh 50, a stainless steel tube 51, a front cross mesh enclosure 52, a rear cross mesh enclosure 53, a nozzle holder support base 60, a nozzle holder 70, a spherical cap 80, a spoiler 90, a temperature sensor base 100, and a differential pressure sensor base 110. The bell mouth cylinder 10 covers the outer side of the heat-preservation inner-layer cylinder 20; the front baffle 30 is positioned between the bell mouth cylinder 10 and the heat-preservation inner layer cylinder 20 and is welded with the bell mouth cylinder 10 and the heat-preservation inner layer cylinder, and an annular cavity can be formed at the moment; the nozzle holder support base 60 is welded to the nozzle holder 70 and to the flare barrel 10. The swirl vane tube 40 and the brazed stainless steel tube 51 are welded together and then penetrate and are welded with the inner-layer cylinder 20 to form a swirl mixing structure; the spherical plug 80 is welded with the inner-layer cylinder body 20 to form an inner-layer cavity; the spoiler 90 is respectively welded with the bell mouth cylinder 10 and the spherical plugging cover 80, and the stainless steel pipe 51 can be seen from the air outlet direction; the temperature sensor base 100 and the differential pressure sensor base 110 are welded with the bell-mouth cylinder 10 and are positioned at the front end of the integral mixed structure.
As shown in fig. 5 to 7, the stainless steel winding net 50, the stainless steel pipe 51, the front cross mesh enclosure 52 and the rear cross mesh enclosure 53 are combined together by brazing; wherein the front cross mesh enclosure 52 and the rear cross mesh enclosure 53 are respectively disposed at upper and lower sides of the stainless steel winding mesh 50. The stainless steel winding net 50 is formed by winding a cylindrical stainless steel wire net after wavy indentation. The front cross net cover and the rear cross net cover are all formed by weaving cylindrical stainless steel wires in a criss-cross mode.
When in use, the tail gas passes through the particle catcher, passes through the inner-layer cylinder body 20 and then enters the rotational flow vane tube 40; at this time, the urea solution injected from the nozzle holder 70 is mixed. When the mixed gas passes through a cross mesh enclosure in front of the filter screen 52, the mixed gas can uniformly pass through a 50 stainless steel winding mesh; then the mixed gas passes through a 50 stainless steel winding net; the urea atomized liquid can be crushed, evaporated and hydrolyzed into ammonia gas, so that the crystallization risk is lower; the tail gas and ammonia gas (urea after hydrolysis) are mixed in the stainless steel winding net 50 and then enter the front cross net cover 52; then through in the annular structure that horn mouth barrel 10 and heat preservation inlayer barrel 20 formed, because of spoiler 90 blocks, the air current can only upwards detour, can increase the mixing distance of tail gas and ammonia, can make the air current draw close to in the middle of flowing through spherical blanking cover 80, guarantee that SCR front end gas mixture (tail gas and ammonia) can evenly distributed.
It should be noted that the above-mentioned embodiments are illustrative of the technical solutions of the present invention and a disclosure of an application scenario, but not limited thereto, and equivalent substitutions of those skilled in the art or other modifications made according to the prior art are all included in the scope of the claims of the present invention as long as they do not exceed the spirit and scope of the technical solutions of the present invention.
Claims (4)
1. The utility model provides a broken structure of urea mixed vortex for aftertreatment which characterized in that: the device comprises a bell mouth cylinder, a heat-preservation inner layer cylinder, a rotational flow blade pipe, a stainless steel winding net, a stainless steel pipe, a nozzle seat, a spherical plug cover and a spoiler; the horn mouth cylinder covers the outer side of the heat-insulation inner-layer cylinder, and a front partition plate is arranged between the horn mouth cylinder and the heat-insulation inner-layer cylinder; a nozzle seat is arranged on the arc-shaped surface of the horn-mouth cylinder through a nozzle seat supporting base; the rotational flow blade pipe is welded with the stainless steel pipe and then radially penetrates through and is welded with the inner-layer cylinder; the spherical plug cover is arranged at one end of the heat-insulation inner side cylinder body; the spoiler is respectively welded with the horn mouth cylinder and the spherical plug cover; the stainless steel winding net is connected in the stainless steel pipe in a brazing mode; and the upper side and the lower side of the stainless steel winding net are respectively provided with a front cross net cover and a rear cross net cover.
2. The urea mixing turbulence breaking structure for post-treatment of claim 1, wherein: the stainless steel winding net is formed by winding a cylindrical stainless steel wire net after wavy indentation.
3. The urea mixing turbulence breaking structure for post-treatment of claim 1, wherein: the front cross net cover and the rear cross net cover are all formed by weaving cylindrical stainless steel wires in a criss-cross mode.
4. The urea mixing turbulence breaking structure for post-treatment of claim 1, wherein: and a temperature sensor base and a differential pressure sensor base are arranged on the horn mouth cylinder body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110066089.1A CN112459880A (en) | 2021-01-19 | 2021-01-19 | Urea mixing turbulence crushing structure for aftertreatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110066089.1A CN112459880A (en) | 2021-01-19 | 2021-01-19 | Urea mixing turbulence crushing structure for aftertreatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112459880A true CN112459880A (en) | 2021-03-09 |
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ID=74802280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110066089.1A Withdrawn CN112459880A (en) | 2021-01-19 | 2021-01-19 | Urea mixing turbulence crushing structure for aftertreatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112459880A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113217150A (en) * | 2021-06-18 | 2021-08-06 | 郑州精益达环保科技有限公司 | Diesel engine aftertreatment mixed structure |
-
2021
- 2021-01-19 CN CN202110066089.1A patent/CN112459880A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113217150A (en) * | 2021-06-18 | 2021-08-06 | 郑州精益达环保科技有限公司 | Diesel engine aftertreatment mixed structure |
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Application publication date: 20210309 |