CN103850762A - Diesel engine exhaust purification device adopting unconventional end surface carrier - Google Patents
Diesel engine exhaust purification device adopting unconventional end surface carrier Download PDFInfo
- Publication number
- CN103850762A CN103850762A CN201410018319.7A CN201410018319A CN103850762A CN 103850762 A CN103850762 A CN 103850762A CN 201410018319 A CN201410018319 A CN 201410018319A CN 103850762 A CN103850762 A CN 103850762A
- Authority
- CN
- China
- Prior art keywords
- carrier
- end surface
- purification plant
- face
- unconventional
- 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
Images
Abstract
The invention relates to an unconventional end surface carrier of a diesel engine exhaust purification device. Non-planar end surface(s) is/ are adopted by the unconventional end surface carrier. The non-planar end surface(s) can be applied to one end or two ends of the carrier of the purification device. A spherical end surface, a circular truncated cone end surface, an ellipsoid end surface, a circular cone end surface or other spatial curved surfaces capable of guaranteeing the axial length of a central area of the carrier to be larger than that of an edge area of the carrier are adopted as the end surface(s) of the non-planar end surface carrier. According to the unconventional end surface carrier, the end surface structure of the carrier is changed, and the gas flow rate of the central area of the carrier is reduced, so that the radial gas flow field in the carrier can be evenly distributed, the temperature field is further evenly distributed, the phenomenon of local overheating of the carrier can be avoided, the phenomenon of catalyst aging in the central area of the carrier can be relieved, and the utilization rate of carrier edge catalyst is increased. Furthermore, the volume between the end surface of the carrier and an expansion section of an inlet of the carrier is reduced, so that the diversion effect of the expansion section is optimized, the vortex is reduced, and the energy loss is reduced. The range of the area with higher gas pressure in the central area of the carrier can be reduced, so that the service life of the diesel engine exhaust purification device is prolonged.
Description
Technical field
The invention belongs to diesel engine vent gas post-processing technology field, be specifically related to a class and adopt the diesel exhaust gas purifying device of unconventional end face carrier.
Background technique
Diesel engine, with its good Economy and power character, is widely used in the fields such as communications and transportation, farm machinery and engineering machinery.In the tail gas of diesel engine, mainly comprise the noxious pollutants such as carbon monoxide (CO), hydrocarbon (HC), particle (PM) and nitrogen oxide (NOx), environment and human body are had to very large harm, and therefore various countries' Abgasgesetz is more and more stricter for the emission limit set of diesel engine.In adopting necessary machine, measure improves burning, also must install Exhaust gas purifying device additional to diesel engine, and tail gas is carried out to external purification, could effectively reduce the discharge amount of noxious pollutant.
The Exhaust gas purifying device of diesel engine mainly contains: the oxidation catalytic converter (Diesel Oxidation Catalyst, DOC) that can reduce particle, HC, CO discharge; Can reduce grain catcher (Diesel Particulate Filter, DPF), the particulate oxidation catalyst converter (Particulate Oxidation Catalyst, POC) of particulate emission; The selective catalytic reduction device (Selective Catalytic Reduction, SCR) of low NOx drainage can fall; The lean-burn NOx catcher (Lean NOx Trap, LNT) of low NOx drainage can fall.The general structure of these purification plants is similarly, comprising: purification plant carrier 1, liner 2, housing 3, as shown in Figure 1, its middle shell 3 mainly contains exhaust gas intake port section 4, extending section 5, carrier holding part 6, contraction section 7, exhaust outlet section 8 and forms.
The uniformity in carrier inside flow field directly affects the purification efficiency of pollutant.The conventional structure carrier that carrier 1 in Fig. 1 uses for existing diesel Exhaust gas purifying device, two end faces of such purification plant carrier 1 are for adopting two plane-parallel conventional end faces, and these two planes are carried out flow path direction perpendicular to air-flow conventionally.Fig. 2 is shown in such purification plant carrier 1(Fig. 1) inside velocity vector figure.Because the end face of purification plant carrier 1 is plane, mainly concentrate on the center region of purification plant carrier 1 by the air-flow of carrier 1, under certain inlet velocity, the radially flow velocity of purification plant carrier 1 there are differences, and the flow velocity faster diameter of scope and exhaust gas intake port section 4 is suitable.Fig. 3 is shown in such purification plant carrier 1(Fig. 1) internal pressure cloud charts.Because the guide functions of extending section 5 is also not obvious, air-flow almost directly enters into the entrance of carrier 1, because having produced higher pressure near the interface at purification plant carrier 1 and gas.Because high stream pressure is the main cause of purification plant carrier 1 fatigue damage, therefore the center region of purification plant carrier 1 is more prone to occur fatigue damage.The catalyzer of purification plant carrier 1 fringe region is not fully used, and causes exhaust purification efficiency to reduce.Waste gas enters after extending section 5, near the end face of purification plant carrier 1, spreads, and the guide functions of extending section 5 is not obvious.Between purification plant carrier 1 and extending section 5, have larger space, thereby cause the generation of eddy current to cause energy loss, and this energy loss also can affect the power performance and the economy performance of diesel engine.
Summary of the invention
The present invention proposes a class and can improve the diesel exhaust gas purifying device of the unconventional end face of employing of diesel exhaust gas purifying device carrier radial flow fields distribution character, and the end surface shape of such carrier of employing is unconventional end face.
The diesel exhaust gas purifying device of the unconventional end face of employing of proposition of the present invention, formed by purification plant carrier 1, liner 2 and purification plant housing 3, wherein: according to airflow direction, purification plant housing 3 is made up of exhaust gas intake port section 4, extending section 5, carrier holding part 6, contraction section 7 and exhaust outlet section 8.Described purification plant carrier 1 is placed in purification plant housing 3 inside, is fixed by liner 2; Along purification plant carrier 1 axially offer some passages, for waste gas circulation.The end surface shape of purification plant carrier 1 one or both ends should ensure that the center region axial length of carrier 1 is greater than the axial length of its fringe region, and described purification plant carrier 1 end face adopts: spherical end surface, round platform end face, ellipsoid end face, circular cone end face or other allly can ensure that the center region axial length of carrier 1 is greater than the space curved surface of its fringe region axial length.
In the present invention, described purification plant carrier 1 is applied in DOC carrier, DPF carrier, POC carrier, SCR carrier or LNT carrier any.
Adopt after said structure, because the center region axial length of purification plant carrier 1 is longer, the gas-flow resistance in this region of flowing through is larger, so just can reduce the flow velocity of purification plant carrier 1 center region, make waste gas relatively even in purification plant inner radial Flow Field Distribution, purification plant carrier 1 center region stream pressure higher range is dwindled, center region catalyst ageing phenomenon is eased, and purification plant carrier 1 fringe region catalyst utilization is improved.Carrier 1 gas flowfield is more even, and temperature field distributes and also can be tending towards evenly, having avoided the generation of local superheating phenomenon, has extended the working life of purification plant.Meanwhile, the volume between purification plant carrier 1 end face and housing extending section 5 reduces, and the water conservancy diversion effect of extending section 5 is optimized, and eddy current reduces, and has reduced energy loss.
Brief description of the drawings
Fig. 1 is the schematic diagram of the conventional carrier of existing diesel purification plant;
Fig. 2 is the inside velocity vector figure of the conventional end face carrier of existing diesel purification plant;
Fig. 3 is the internal pressure cloud charts of the conventional end face carrier of existing diesel purification plant;
Fig. 4 is the schematic diagram of a kind of diesel engine purification plant globose end surface carrier of the present invention;
Fig. 5 is the inside velocity vector figure of a kind of diesel engine purification plant of the present invention globose end surface carrier;
Fig. 6 is the internal pressure cloud charts of a kind of diesel engine purification plant of the present invention globose end surface carrier;
Fig. 7 is the schematic diagram of a kind of diesel engine purification plant round platform end face carrier of the present invention;
Fig. 8 is the inside velocity vector figure of a kind of diesel engine purification plant of the present invention round platform end face carrier;
Fig. 9 is the internal pressure cloud charts of a kind of diesel engine purification plant of the present invention round platform end face carrier.
Number in the figure: 1 is purification plant carrier, 2 is liner, and 3 is purification plant housing, and 4 is exhaust gas intake port section, and 5 is extending section, and 6 is carrier holding part, and 7 is contraction section, and 8 is exhaust outlet section.
Embodiment
Further set forth the present invention below by embodiment.
embodiment 1: globose end surface carrier(
diesel engine DOC oxidation catalytic converter adopts)
Fig. 4 is the composition schematic diagram of diesel engine DOC oxidation catalytic converter.This DOC oxidation catalytic converter is made up of purification plant carrier 1, liner 2, the housing 3 of spherical end surface.The purification plant carrier 1 of this spherical end surface is placed in housing 3 inside of DOC oxidation catalytic converter, is fixed by liner 2, and housing 3 is mainly made up of exhaust gas intake port section 4, extending section 5, carrier holding part 6, contraction section 7 and exhaust outlet section 8.Fig. 5 is the inside velocity vector figure of this globose end surface carrier, can find out, globose end surface carrier 1 has played obvious guide functions.Due to the center region axial length of purification plant carrier 1 longer, the gas-flow resistance in this region of flowing through is larger, the flow velocity of purification plant carrier 1 center region that so just can reduce, make waste gas relatively even in carrier 1 inner radial Flow Field Distribution, temperature field distributes and also can be tending towards evenly, having avoided the generation of local superheating phenomenon.Air-flow separates more early entering after extending section 5, the space availability ratio that extending section is 5 li is improved, and therefore the vortex phenomenon of 5 li of extending sections has obtained alleviating, and this is conducive to reduce the energy loss of air-flow in flow process.Fig. 6 is the internal pressure cloud charts of the purification plant carrier 1 of this spherical end surface, can find out, the pressure maximum scope of purification plant carrier 1 center region of spherical end surface is less than conventional carrier, center region catalyst ageing phenomenon is eased, purification plant carrier 1 fringe region catalyst utilization is improved, and has extended the working life of DOC oxidation catalytic converter.
embodiment 2: round platform end face carrier(
diesel SCR selective catalytic reduction device adopts)
Fig. 7 is the composition schematic diagram of diesel SCR selective catalytic reduction device.This SCR selective catalytic reduction device is made up of purification plant carrier 1, liner 2, the housing 3 of round platform end face.This round platform end face carrier 1 is placed in housing 3 inside of SCR selective catalytic reduction device, is fixed by liner 2, and housing 3 is mainly made up of exhaust gas intake port section 4, extending section 5, carrier holding part 6, contraction section 7, exhaust outlet section 8.Fig. 8 is the inside velocity vector figure of this round platform end face carrier, can find out, round platform end face carrier 1 has played obvious guide functions.Due to the center region axial length of purification plant carrier 1 longer, the gas-flow resistance in this region of flowing through is larger, the flow velocity of purification plant carrier 1 center region that so just can reduce, make waste gas relatively even in carrier 1 inner radial Flow Field Distribution, temperature field distributes and also can be tending towards evenly, having avoided the generation of local superheating phenomenon.Air-flow separates more early entering after extending section 5, the space availability ratio that extending section is 5 li is improved, and therefore the vortex phenomenon of 5 li of extending sections has obtained alleviating, and this is conducive to reduce the energy loss of air-flow in flow process.Fig. 9 is the internal pressure cloud charts of the purification plant carrier 1 of this round platform end face, can find out, the pressure maximum scope of purification plant carrier 1 center region of round platform end face is less than conventional carrier, center region catalyst ageing phenomenon is eased, purification plant carrier 1 fringe region catalyst utilization is improved, and has extended the working life of SCR selective catalytic reduction device.
Claims (2)
1. one kind adopts the diesel exhaust gas purifying device of unconventional end face, formed by purification plant carrier (1), liner (2) and purification plant housing (3), wherein: according to airflow direction, purification plant housing (3) is made up of exhaust gas intake port section (4), extending section (5), carrier holding part (6), contraction section (7) and exhaust outlet section (8); It is characterized in that described purification plant carrier (1) is placed in purification plant housing (3) inside, is fixed by liner (2); Axially offer some passages along purification plant carrier (1), for waste gas circulation, the end surface shape of purification plant carrier (1) one or both ends should ensure that the center region axial length of carrier (1) is greater than the axial length of its fringe region, and described purification plant carrier (1) end face adopts: spherical end surface, round platform end face, ellipsoid end face, circular cone end face or other allly can ensure that the center region axial length of carrier (1) is greater than the space curved surface of its fringe region axial length.
2. device according to claim 1, is characterized in that described purification plant carrier (1) is applied in DOC carrier, DPF carrier, POC carrier, SCR carrier or LNT carrier any.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410018319.7A CN103850762A (en) | 2014-01-16 | 2014-01-16 | Diesel engine exhaust purification device adopting unconventional end surface carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410018319.7A CN103850762A (en) | 2014-01-16 | 2014-01-16 | Diesel engine exhaust purification device adopting unconventional end surface carrier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103850762A true CN103850762A (en) | 2014-06-11 |
Family
ID=50858841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410018319.7A Pending CN103850762A (en) | 2014-01-16 | 2014-01-16 | Diesel engine exhaust purification device adopting unconventional end surface carrier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103850762A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110102181A (en) * | 2019-05-07 | 2019-08-09 | 北京工业大学 | A kind of device and method for VOCs catalysis oxidation |
| CN114762828A (en) * | 2021-01-13 | 2022-07-19 | 长城汽车股份有限公司 | Anti-sulfur poisoning catalyst, LNT device, tail gas treatment system and vehicle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100176050A1 (en) * | 2005-11-24 | 2010-07-15 | Bridgestone Corporation | Fluid purifying apparatus and filter housing |
| CN201588675U (en) * | 2009-12-24 | 2010-09-22 | 同济大学 | Diesel particulate filter and selective catalytic reduction compound system for tail gas clean-up of diesel engine |
| CN203112564U (en) * | 2012-12-31 | 2013-08-07 | 上海富大同诺环境科技有限公司 | Vertical micro-vortex flocculation clarifier |
| CN203321634U (en) * | 2013-07-02 | 2013-12-04 | 长沙理工大学 | Diesel particulate filter with chip carrier |
-
2014
- 2014-01-16 CN CN201410018319.7A patent/CN103850762A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100176050A1 (en) * | 2005-11-24 | 2010-07-15 | Bridgestone Corporation | Fluid purifying apparatus and filter housing |
| CN201588675U (en) * | 2009-12-24 | 2010-09-22 | 同济大学 | Diesel particulate filter and selective catalytic reduction compound system for tail gas clean-up of diesel engine |
| CN203112564U (en) * | 2012-12-31 | 2013-08-07 | 上海富大同诺环境科技有限公司 | Vertical micro-vortex flocculation clarifier |
| CN203321634U (en) * | 2013-07-02 | 2013-12-04 | 长沙理工大学 | Diesel particulate filter with chip carrier |
Non-Patent Citations (1)
| Title |
|---|
| 黄文伟、孟凡生: "《柴油发动机尾气后处理技术的发展》", 《内燃机》, no. 4, 31 August 2010 (2010-08-31), pages 1 - 4 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110102181A (en) * | 2019-05-07 | 2019-08-09 | 北京工业大学 | A kind of device and method for VOCs catalysis oxidation |
| CN110102181B (en) * | 2019-05-07 | 2021-11-26 | 北京工业大学 | Device and method for catalytic oxidation of VOCs (volatile organic compounds) |
| CN114762828A (en) * | 2021-01-13 | 2022-07-19 | 长城汽车股份有限公司 | Anti-sulfur poisoning catalyst, LNT device, tail gas treatment system and vehicle |
| CN114762828B (en) * | 2021-01-13 | 2024-04-05 | 长城汽车股份有限公司 | Sulfur poisoning resistant catalyst, LNT device, tail gas treatment system and vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8539761B2 (en) | Flow device for exhaust treatment system | |
| JP4930796B2 (en) | Exhaust gas purification device and exhaust pipe for diesel engine | |
| KR101758217B1 (en) | Reducing agent mixing apparatus having liquid drop preventing function | |
| US11480082B2 (en) | Systems and methods for dynamic control of filtration efficiency and fuel economy | |
| JP6024694B2 (en) | Exhaust gas purification system for an internal combustion engine with a supercharger | |
| CN108252771B (en) | Tail gas post-treatment box for heat preservation by using treated tail gas | |
| GB2500059A (en) | Mixer for an exhaust gas after-treatment system | |
| JP2008144644A (en) | Exhaust emission control device for internal combustion engine | |
| CN204168579U (en) | A kind of two medium low-temperature plasma generator | |
| JP2010144569A (en) | Selective reduction catalyst device | |
| CN206987927U (en) | Exhaust aftertreatment mixing arrangement and its encapsulation | |
| CN103089383B (en) | Guiding device and guiding method for diesel engine selective catalytic reduction (SCR) system for automobile | |
| CN103850762A (en) | Diesel engine exhaust purification device adopting unconventional end surface carrier | |
| JP2011106360A (en) | Urea reduction type scr device for internal combustion engine | |
| JP2007064073A (en) | Exhaust pipe and exhaust emission control device | |
| CN104219863A (en) | Double-medium low-temperature plasma generator | |
| JP2016070244A (en) | Internal combustion engine and exhaust emission control method of internal combustion engine | |
| KR101022018B1 (en) | Exhaust gas purification system of engine and marine engine with the same | |
| KR101427950B1 (en) | Mixer of selective catalyst reduction device for exhaust system | |
| CN102383902B (en) | Control and treatment method and system for emission of non-electric-control diesel engine | |
| KR101593485B1 (en) | A structure of canning for Selective Catalytic Reduction with guide vane and air distribution system | |
| CN210118190U (en) | Tail gas aftertreatment device and sandwich type mixing pipe thereof | |
| KR102047184B1 (en) | Mixer for catalytic reduction system | |
| CN114687836A (en) | Heat accumulation method and device for catalytic type particle filter for exhaust aftertreatment of diesel engine | |
| KR101365892B1 (en) | Air intake duct apparatus capable of improving efficiency of air intake in vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140611 |
|
| WD01 | Invention patent application deemed withdrawn after publication |