CN105402009A - Spiral mixer for integrated injection of SCR catalyst - Google Patents
Spiral mixer for integrated injection of SCR catalyst Download PDFInfo
- Publication number
- CN105402009A CN105402009A CN201510946098.4A CN201510946098A CN105402009A CN 105402009 A CN105402009 A CN 105402009A CN 201510946098 A CN201510946098 A CN 201510946098A CN 105402009 A CN105402009 A CN 105402009A
- Authority
- CN
- China
- Prior art keywords
- mixer
- cylindrical shell
- dividing plate
- scr
- integrated injection
- 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
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
- 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
- F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
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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
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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
-
- 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
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The invention belongs to the technical field of diesel engine tail gas aftertreatment, and relates to a spiral mixer for integrated injection of an SCR catalyst. The spiral mixer comprises a barrel. A front end cover and a rear end cover are arranged at the two ends of the barrel respectively. A first SCR carrier and a second SCR carrier are arranged in an inner cavity of the barrel. A gas inlet pipe is arranged at the position, between a first separation plate and the front end cover, of the barrel. A mixer device is arranged below the gas inlet pipe and comprises a taper pipe, a mixing pipe and a mixer body which are sequentially connected. The gas outlet end of the taper pipe is fixed to the first separation plate, and the gas inlet end of the mixer body is fixed to the front end cover. By means of the mixer, the aims of urea crushing, urea crystallization and even ammonia distribution can be effectively achieved.
Description
Technical field
The invention belongs to diesel engine vent gas post-processing technology field, relate to the integrated injection helical mixer of a kind of SCR catalyst.
Background technique
Traditional SCR(selective catalytic reduction converter) urea nozzle is placed on outlet pipe by connecting base by catalyst converter, larger to arrangement space demand, and for the different chassis of same engine, the situation of different arrangement space will cause urea-spray position to change, urea-spray performance also changes, thus causes needing again to demarcate.Meanwhile, directly urea nozzle being integrated in SCR catalyst is the needs of many clients, and integrated nozzle is not enough due to difficult arrangement, urea atomization space, easily causes urea droplets to be directly injected on EGP wall, and produces serious urea crystals problem.The main method of current solution integrated injection SCR converter urea crystals problem is wall by mixer reasonable in design risk to the crushing effect and reduction urea of strengthening urea, also improves the flow field uniformity of system simultaneously.
Summary of the invention
The present invention is directed to the problems referred to above, provide a kind of SCR catalyst integrated injection helical mixer, this mixer effectively can solve the sex chromosome mosaicism that is evenly distributed of urea fragmentation, urea crystals and ammonia.
According to technological scheme of the present invention: the integrated injection helical mixer of a kind of SCR catalyst, it is characterized in that: comprise cylindrical shell, described cylindrical shell two ends arrange front cover respectively, rear end cover, one SCR carrier is set in cylinder lumen, 2nd SCR carrier, cylindrical shell between first dividing plate and front cover arranges suction tude, below suction tude, mixer apparatus is set, described mixer apparatus comprises the Taper Pipe connected in turn, mixing tube, mixer, the outlet side of described Taper Pipe is fixed on the first dividing plate, the inlet end of mixer is fixed on front cover, described mixer apparatus arranged outside heat-preservation cylinder, steam outlet pipe lower end is communicated with heat-preservation cylinder, mixer is multi-circle spiral flow shape, the circumferential surface of mixer is provided with intake grill, the both sides of intake grill arrange barge board respectively, barge board outer end is fixed on heat-preservation cylinder inwall, cylindrical shell corresponds to rear end cover side and set out tracheae, connect hush tube inside steam outlet pipe, hush tube is fixed by the 3rd dividing plate, and the 3rd forms mixing chamber between dividing plate and second partition.
As a further improvement on the present invention, described suction tude upper end arranges inlet flange, and on the body of suction tude set temperature sensor.
As a further improvement on the present invention, between a described SCR carrier and cylinder inboard wall, the first liner is set, between the 2nd SCR carrier and cylinder inboard wall, the second liner is set.
As a further improvement on the present invention, on described cylindrical shell correspond between rear end cover and the 3rd dividing plate, NOx sensor is set.
As a further improvement on the present invention, be connected with the first dividing plate internal diameter of one end of described Taper Pipe is greater than the internal diameter of the one end that to be connected with mixing tube.
Technique effect of the present invention is: the mixer of prior art cannot change urea in mixing tube wall point, the present invention adopts and selects helical mixer structure, utilize swirling eddy mixing urea, the wall that prevents urea to cross on tube wall, and along with the change of flow velocity under different operating mode, urea wall point and is had significant change, prevents urea wall at same position all the time and produce crystallization; Prior art mixer front-end and back-end all adopt straight tube or the bend pipe of identical caliber, and airspeed does not have significant change in mixed zone.And ribbon mixer passage section is little compared with mixing tube, the airspeed of mixer and mixing tube inside is accelerated, thus accelerates the evaporation rate of urea liquid film, improve the temperature in mixing tube simultaneously, reduce crystallization risk from another point of view; The mixer of prior art does not have insulation effect, and the mixing tube of mixer rear end in the present invention and expansion Taper Pipe outside are provided with heat-preservation cylinder, two-layer thermal insulation layer is defined between heat-preservation cylinder and mixing tube and between heat-preservation cylinder and urceolus, enhance heat insulation effect, reduce further urea crystals risk; Mixer rear end adopts tubular expansion cone, rotates urea and will spread to surrounding under the influence of centrifugal force, and expansion Taper Pipe strengthens this diffusion, improves the mixed effect of air-flow; Ribbon mixer improves air-flow mixing uniformity on SCR carrier end face and ammonia distributing homogeneity.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the schematic diagram of mixer apparatus in the present invention.
Fig. 3 is the left view of Fig. 2.
Fig. 4 is the stereogram of Fig. 2.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described.
In Fig. 1 ~ 4, comprise inlet flange 1, temperature transducer 2, suction tude 3, mixer 4, intake grill 4-1, barge board 4-2, mixing tube 5, Taper Pipe 6, heat-preservation cylinder 7, front cover 8, urea nozzle base 9, first dividing plate 10, SCR carrier 11, first liner 12, the 2nd SCR carrier 13, second liner 14, cylindrical shell 15, second partition 16, the 3rd dividing plate 17, hush tube 18, rear end cover 19, NOx sensor 20, steam outlet pipe 21 etc.
As shown in Fig. 1 ~ 4, the present invention is the integrated injection helical mixer of a kind of SCR catalyst, comprise cylindrical shell 15, described cylindrical shell 15 two ends arrange front cover 8 respectively, rear end cover 19, one SCR carrier 11 is set in cylindrical shell 15 inner chamber, 2nd SCR carrier 13, cylindrical shell 15 between first dividing plate 10 and front cover 8 arranges suction tude 3, below suction tude 3, mixer apparatus is set, described mixer apparatus comprises the Taper Pipe 6 connected in turn, mixing tube 5, mixer 4, the outlet side of described Taper Pipe 6 is fixed on the first dividing plate 10, the inlet end of mixer 4 is fixed on front cover 8, described mixer apparatus arranged outside heat-preservation cylinder 7, steam outlet pipe 3 lower end is communicated with heat-preservation cylinder 7, mixer 4 is in multi-circle spiral flow shape, the circumferential surface of mixer 4 is provided with intake grill 4-1, the both sides of intake grill 4-1 arrange barge board 4-2 respectively, barge board 4-2 is fixed on outer end on heat-preservation cylinder 7 inwall, cylindrical shell 15 corresponds to rear end cover 19 side and set out tracheae 21, connect hush tube 18 inside steam outlet pipe 21, hush tube 18 is fixed by the 3rd dividing plate 17, forms mixing chamber between the 3rd dividing plate 17 and second partition 16.
Suction tude 3 upper end arranges inlet flange 1, and on the body of suction tude 3 set temperature sensor 2.
Arrange between one SCR carrier 11 and cylindrical shell 15 inwall between the first liner the 12, two SCR carrier 13 and cylindrical shell 15 inwall and the second liner 14 is set.
Cylindrical shell 15 corresponds between rear end cover 19 and the 3rd dividing plate 17, NOx sensor 20 is set.
Be connected with the first dividing plate 10 internal diameter of one end of Taper Pipe 6 is greater than the internal diameter of the one end that to be connected with mixing tube 5.
Working procedure of the present invention is as follows: urea nozzle base 9 is arranged on front cover 8, and it is inner that air-flow enters heat-preservation cylinder 7 by suction tude 3, and heat-preservation cylinder 7 reduces the dissipation rate of intake temperature, and the delivery temperature of mixing chamber inside is kept in the reasonable scope.Air-flow in heat-preservation cylinder 7 enters mixing tube 5 by rotating after mixer 4, swirling eddy extend urea mixing tube 5 inside wall time and distance, strengthen the evaporation rate of urea liquid film on tube wall simultaneously.Mixing tube 5 has certain reducing effect, will improve the temperature of mixing tube 5 inwall further, reduces urea crystals risk.Swirling eddy is by entering expansion Taper Pipe 6 in mixing tube 5, and air-flow further to surrounding expansion, will improve the uniformity of ammonia distribution on urea and mixed effect and carrier end face due to centrifugal action.
Swirling eddy enters in a SCR carrier 11, the 2nd SCR carrier 13 by expanding after Taper Pipe 6 is expanded respectively, enters hush tube 18, and eventually pass through steam outlet pipe and enter air after purification further by the mixing chamber of second partition 16 and the 3rd dividing plate 17 composition.
Claims (5)
1. the integrated injection helical mixer of SCR catalyst, it is characterized in that: comprise cylindrical shell (15), described cylindrical shell (15) two ends arrange front cover (8) respectively, rear end cover (19), one SCR carrier (11) is set in cylindrical shell (15) inner chamber, 2nd SCR carrier (13), cylindrical shell (15) between first dividing plate (10) and front cover (8) arranges suction tude (3), suction tude (3) below arranges mixer apparatus, described mixer apparatus comprises the Taper Pipe (6) connected in turn, mixing tube (5), mixer (4), the outlet side of described Taper Pipe (6) is fixed on the first dividing plate (10), the inlet end of mixer (4) is fixed on front cover (8), described mixer apparatus arranged outside heat-preservation cylinder (7), steam outlet pipe (3) lower end is communicated with heat-preservation cylinder (7), mixer (4) is in multi-circle spiral flow shape, the circumferential surface of mixer (4) is provided with intake grill (4-1), the both sides of intake grill (4-1) arrange barge board (4-2) respectively, barge board (4-2) outer end is fixed on heat-preservation cylinder (7) inwall, upper rear end cover (19) side that corresponds to of cylindrical shell (15) sets out tracheae (21), steam outlet pipe (21) inner side connects hush tube (18), hush tube (18) is fixed by the 3rd dividing plate (17), forms mixing chamber between the 3rd dividing plate (17) and second partition (16).
2. the integrated injection helical mixer of SCR catalyst as claimed in claim 1, is characterized in that: described suction tude (3) upper end arranges inlet flange (1), and on the body of suction tude (3) set temperature sensor (2).
3. the integrated injection helical mixer of SCR catalyst as claimed in claim 1, it is characterized in that: between a described SCR carrier (11) and cylindrical shell (15) inwall, the first liner (12) is set, between the 2nd SCR carrier (13) and cylindrical shell (15) inwall, the second liner (14) is set.
4. the integrated injection helical mixer of SCR catalyst as claimed in claim 1, is characterized in that: described cylindrical shell (15) upper corresponding to arranges NOx sensor (20) between rear end cover (19) and the 3rd dividing plate (17).
5. the integrated injection helical mixer of SCR catalyst as claimed in claim 1, is characterized in that: be connected with the first dividing plate (10) internal diameter of one end of described Taper Pipe (6) is greater than the internal diameter of the one end that to be connected with mixing tube (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510946098.4A CN105402009A (en) | 2015-12-17 | 2015-12-17 | Spiral mixer for integrated injection of SCR catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510946098.4A CN105402009A (en) | 2015-12-17 | 2015-12-17 | Spiral mixer for integrated injection of SCR catalyst |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105402009A true CN105402009A (en) | 2016-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510946098.4A Pending CN105402009A (en) | 2015-12-17 | 2015-12-17 | Spiral mixer for integrated injection of SCR catalyst |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105402009A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106368771A (en) * | 2016-10-24 | 2017-02-01 | 无锡威孚力达催化净化器有限责任公司 | Barrel type SCR aftertreatment mixing device |
| CN106368780A (en) * | 2016-08-29 | 2017-02-01 | 无锡威孚力达催化净化器有限责任公司 | Exhaust gas aftertreatment assembly for non-road barrel type integrated injection diesel engine |
| CN106762064A (en) * | 2017-03-13 | 2017-05-31 | 上海航天能源股份有限公司 | A kind of denitration of gas internal-combustion engine distributed energy and noise reduction integrated apparatus |
| CN107178412A (en) * | 2017-06-29 | 2017-09-19 | 杭州银轮科技有限公司 | Cartridge type SCR encapsulation inlet end assemblies are entered in side |
| WO2017215461A1 (en) * | 2016-06-15 | 2017-12-21 | 天纳克（苏州）排放系统有限公司 | Exhaust aftertreatment apparatus |
| CN107701264A (en) * | 2017-11-25 | 2018-02-16 | 华东交通大学 | A kind of integral exhaust purifying muffler for being used to improve sound quality |
| WO2018095140A1 (en) * | 2016-11-25 | 2018-05-31 | 天纳克（苏州）排放系统有限公司 | Exhaust post-treatment device |
| CN108894859A (en) * | 2018-07-25 | 2018-11-27 | 汽解放汽车有限公司 | A kind of cylinder type integrates the post-processor assembly of detachable urea nozzle |
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| US20090019842A1 (en) * | 2007-07-20 | 2009-01-22 | Mitsubishi Fuso Truck And Bus Corporation | Exhaust purification device for engine |
| CN101624932A (en) * | 2008-07-11 | 2010-01-13 | 通用汽车环球科技运作公司 | Nozzle diffuser mixer |
| CN201470307U (en) * | 2009-09-04 | 2010-05-19 | 东风汽车有限公司 | Turbulent flow mixer for tail gas of engine |
| CN202250314U (en) * | 2011-08-30 | 2012-05-30 | 浙江邦得利汽车环保技术有限公司 | SCR (Selective Catalytic Reduction) purification and sound-silencing device capable of quickly igniting |
| CN103321724A (en) * | 2013-07-09 | 2013-09-25 | 潍柴动力股份有限公司 | SCR catalyzing silencer and hybrid tube device of SCR catalyzing silencer |
| CN203452872U (en) * | 2013-03-08 | 2014-02-26 | 埃贝施佩歇尔排气技术有限及两合公司 | Inflow chamber used for exhaust catalyst and exhaust purifying system used for motor vehicle |
| CN105041433A (en) * | 2015-09-01 | 2015-11-11 | 安徽江淮汽车股份有限公司 | Automotive SCR system |
| CN105156181A (en) * | 2015-09-10 | 2015-12-16 | 苏州添蓝动力科技有限公司 | Integrated nozzle type SCR catalysis silencer |
-
2015
- 2015-12-17 CN CN201510946098.4A patent/CN105402009A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090019842A1 (en) * | 2007-07-20 | 2009-01-22 | Mitsubishi Fuso Truck And Bus Corporation | Exhaust purification device for engine |
| CN101624932A (en) * | 2008-07-11 | 2010-01-13 | 通用汽车环球科技运作公司 | Nozzle diffuser mixer |
| CN201470307U (en) * | 2009-09-04 | 2010-05-19 | 东风汽车有限公司 | Turbulent flow mixer for tail gas of engine |
| CN202250314U (en) * | 2011-08-30 | 2012-05-30 | 浙江邦得利汽车环保技术有限公司 | SCR (Selective Catalytic Reduction) purification and sound-silencing device capable of quickly igniting |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017215461A1 (en) * | 2016-06-15 | 2017-12-21 | 天纳克（苏州）排放系统有限公司 | Exhaust aftertreatment apparatus |
| CN106368780A (en) * | 2016-08-29 | 2017-02-01 | 无锡威孚力达催化净化器有限责任公司 | Exhaust gas aftertreatment assembly for non-road barrel type integrated injection diesel engine |
| CN106368771A (en) * | 2016-10-24 | 2017-02-01 | 无锡威孚力达催化净化器有限责任公司 | Barrel type SCR aftertreatment mixing device |
| WO2018095140A1 (en) * | 2016-11-25 | 2018-05-31 | 天纳克（苏州）排放系统有限公司 | Exhaust post-treatment device |
| CN106762064A (en) * | 2017-03-13 | 2017-05-31 | 上海航天能源股份有限公司 | A kind of denitration of gas internal-combustion engine distributed energy and noise reduction integrated apparatus |
| CN107178412A (en) * | 2017-06-29 | 2017-09-19 | 杭州银轮科技有限公司 | Cartridge type SCR encapsulation inlet end assemblies are entered in side |
| CN107178412B (en) * | 2017-06-29 | 2023-09-05 | 杭州银轮科技有限公司 | Side-feeding cylinder type SCR packaging air inlet end assembly |
| CN107701264A (en) * | 2017-11-25 | 2018-02-16 | 华东交通大学 | A kind of integral exhaust purifying muffler for being used to improve sound quality |
| CN107701264B (en) * | 2017-11-25 | 2023-12-19 | 华东交通大学 | Integrated exhaust purification muffler for improving sound quality |
| CN108894859A (en) * | 2018-07-25 | 2018-11-27 | 汽解放汽车有限公司 | A kind of cylinder type integrates the post-processor assembly of detachable urea nozzle |
| CN108894859B (en) * | 2018-07-25 | 2023-10-24 | 一汽解放汽车有限公司 | Post-processor assembly of cylindrical integrated detachable urea nozzle |
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Application publication date: 20160316 |
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