CN202467984U - Selective catalytic reduction (SCR) catalytic converter for aftertreatment on tail gas of diesel engine - Google Patents
Selective catalytic reduction (SCR) catalytic converter for aftertreatment on tail gas of diesel engine Download PDFInfo
- Publication number
- CN202467984U CN202467984U CN2011205751460U CN201120575146U CN202467984U CN 202467984 U CN202467984 U CN 202467984U CN 2011205751460 U CN2011205751460 U CN 2011205751460U CN 201120575146 U CN201120575146 U CN 201120575146U CN 202467984 U CN202467984 U CN 202467984U
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- CN
- China
- Prior art keywords
- catalyst carrier
- gas
- gas inlet
- inlet pipe
- right baffle
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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
- 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
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- Exhaust Gas After Treatment (AREA)
Abstract
The utility model discloses a selective catalytic reduction (SCR) catalytic converter for aftertreatment on tail gas of a diesel engine. The SCR catalytic converter comprises a shell, a left end cover, a right end cover, a left baffle, a right baffle, a gas inlet pipe, a small baffle of a gas inlet pipe, a gas outlet pipe and at least one catalyst carrier component, wherein the left baffle and the right baffle are arranged in the shell at intervals and divide the shell into a gas inlet cavity, a gas outlet cavity and a gas outlet buffer cavity; the gas inlet pipe is inserted into the gas inlet cavity from the upper part of the shell; multiple rows of small holes are formed on the gas inlet pipe; the lower end of the gas inlet pipe is sealed by the small baffle of the gas inlet pipe; the left baffle is hermetically connected with the carrier; multiple holes are formed on the right baffle; the gas outlet pipe is inserted into the gas outlet cavity; the catalyst carrier component is arranged in the mixed cavity; the axial direction of the catalyst carrier component is parallel with that of the gas inlet pipe; and the catalyst carrier component is connected with the gas inlet cavity and the gas outlet buffer cavity respectively. The SCR catalytic converter has the advantages and characteristics of high flowing performance, excellent mixed performance of discharging gas and urea and moderate pressure loss and has a certain silencing effect.
Description
Technical field
The utility model relates to diesel exhaust aftertreatment system field, relates to the SCR catalyst converter of diesel engine vent gas reprocessing in particular.
Background technique
Diesel engine is all having remarkable advantages than petrol engine aspect power character, Economy and the reliability, particularly CO
2Discharge lowly, its purposes expands on all kinds of vehicles gradually.But it is nitrogen oxide (NO that there is maximum problem in diesel engine
x) and particulate matter (PM) discharging seriously.Along with Chinese emission control regulations are more and more tighter, and homemade DENG performance and oil product problem, depend the emission controls by improving combustion measure alone and seem unable to do what one wishes, therefore be necessary to take the outer after-treatment device of machine to reach emissions object.
Diesel motor exhaust SCR technology (SCR) is the outer post-processing technology of a kind of machine of vehicle diesel engine, can effectively improve diesel engine NO
xDischarging, and insensitive to the diesel oil sulphur content.This technology is through spraying into certain density urea liquid, the NH that after pyrolysis (reaction 1) and hydrolysis (reaction 2), produces in outlet pipe
3And NO
xReduction reaction (reaction 3-5) takes place in catalytic converter, with NO
xBe converted into H
2O and N
2
(NH
2)
2CO→NH
3+HNCO (1)
H
2O+HNCO→NH
3+CO
2 (2)
4NO+4NH
3+O
2→4N
2+6H
2O (3)
2NH
3+NO+NO
2→2N
2+3H
2O (4)
6NO
2+8NH
3→7N
2+12H
2O (5)
For the main evaluation index of the SCR catalytic converter that is used for the diesel engine vent gas processing, can estimate by following index:
1, the distribution of fluid between each catalyst carrier and the flow uniformity value of each catalyst carrier front-end face.
Improve the mass flow distribution of tail gas between each catalyst carrier, help improving the utilization ratio of carried catalyst, improve the transformation efficiency of catalyzer; Help reducing the pressure loss of air-flow on catalyst carrier; Help catalyst carrier and reach initiation temperature faster.
2, the pressure loss of system.
A part of whole vent systems during the pressure loss of catalytic converter, the pressure loss that reduces catalytic converter helps reducing the back pressure of vent systems, thereby helps improving the performance of motor.
3, air speed.
The size of air speed has been reacted the waiting time of air-flow on catalyst carrier.Air speed is more little, and the waiting time of air-flow in catalyst carrier is long more, and transformation efficiency is just high more.
4, acoustic insertion loss.
Summary of the invention
The purpose of the utility model is to provide the mixed performance of a kind of good flowing properties, exhaust and urea good, crushing is moderate, and has certain noise elimination function, is used for the SCR catalytic converter of diesel engine vent gas reprocessing.
For realizing above purpose, the technological scheme that this patent adopts is:
A kind of SCR catalytic converter that is used for the diesel engine vent gas reprocessing; Comprise housing, left end cap, right end cap, right baffle-plate, right baffle plate, gas inlet pipe, suction tude small front apron, gas outlet tube and at least one catalyst carrier assembly, it is characterized in that left baffle is installed in the housing at interval, housing is separated into the air-inlet cavity in left side; The middle outlet chamber and the buffer cavity of giving vent to anger on right side; Wherein, right baffle-plate is separated air-inlet cavity and outlet chamber, and right baffle plate is separated the outlet chamber and the buffer cavity of giving vent to anger; Described right baffle plate is provided with a plurality of perforates, can give vent to anger buffer cavity and outlet chamber be communicated with; Described gas inlet pipe is inserted in the described air-inlet cavity from the housing upper left quarter, have many row's apertures on the gas inlet pipe, and the gas inlet pipe lower end is sealed by described suction tude small front apron; Gas outlet tube inserts in the described outlet chamber from the housing middle lower portion, and with described outlet chamber UNICOM; Described catalyst carrier assembly is arranged in the outlet chamber, and is connected between right baffle-plate and the right baffle plate, and respectively with the described air-inlet cavity and the buffer cavity UNICOM of giving vent to anger.
According to the utility model, two or more catalyst carrier assemblies laterally arrange, and described each catalyst carrier assembly comprises the catalyst carrier of one or more series connection, and each catalyst carrier is coated with liner, and described liner is coated with a shell.Shell in the catalyst carrier assembly and liner can be protected and the clamping catalyst carrier, prevent that catalyst carrier lost efficacy at work.
According to the utility model, described each catalyst carrier is cylindrical structural, and is provided with many parallel channels that run through both ends of the surface vertically, and the internal surface of each passage is provided with catalyst coat, and described catalyzer is that zeolite based catalysts and aluminite are catalyst based.
According to the utility model, insert the outlet chamber of described gas outlet tube in the middle of housing, gas is discharged in the atmosphere through gas outlet tube.
A kind of SCR catalytic converter that is used for the diesel engine vent gas reprocessing of the utility model, gas inlet pipe lower end are sealed and can be guaranteed that urea mixes with exhaust, and aperture has certain noise elimination effect on the gas inlet pipe.The structure of air-inlet cavity can guarantee that urea and exhaust have enough spaces to mix, and passes through catalyst carrier equably.Buffer cavity and the outlet chamber structure of giving vent to anger can reduce the back pressure of giving vent to anger.The installing space of SCR catalytic converter can be saved down in the position of gas outlet tube.The mixed performance that the utlity model has good fluidity, exhaust and urea is good, and crushing is moderate, the characteristics that installing space is little, and have the effect of certain noise elimination.
Description of drawings
Fig. 1 is a kind of overall structure schematic representation that is used for the SCR catalytic converter of diesel engine vent gas reprocessing of the utility model.
Fig. 2 is the gas trajectory diagram of exhaust at the utility model.
Fig. 3 is the gas inlet pipe schematic representation.
Fig. 4 is the structural representation of one group of catalyst carrier assembly of the utility model.
Fig. 5 is the enlarged view at B place among Fig. 4.
Fig. 6 is the enlarged view at C place among Fig. 4.
Fig. 7 is the backboard schematic representation.
Wherein: 1-left end cap; 2-gas inlet pipe; 3-gas tube small front apron; 4-housing; 5-right baffle-plate; The 6-gas outlet tube; The right baffle plate of 7-; The 8-right end cap; 9-catalyst carrier assembly; The 10-air-inlet cavity; The 11-outlet chamber; The 12-buffer cavity of giving vent to anger; Many row's apertures on the 21-gas inlet pipe; Perforate on the right baffle plate of 71-; 91,93-catalyst carrier; 92,94-catalyst carrier assembly liner; 95-catalyst carrier package shell; 911, the parallel channels in the 913-carrier.
Embodiment
Referring to Fig. 1; A kind of SCR catalytic converter that is used for the diesel engine vent gas reprocessing comprises left end cap 1, gas inlet pipe 2, suction tude small front apron 3, housing 4, right baffle-plate 5, gas outlet tube 6, right baffle plate 7, right end cap 8 and at least one catalyst carrier assembly 9.Right baffle-plate 5 is installed in the housing 4 with right baffle plate 7 at interval; Housing 4 is separated into the air-inlet cavity 10 in left side, the middle outlet chamber 11 and the buffer cavity 12 of giving vent to anger on right side, wherein; Right baffle-plate 5 is separated air-inlet cavity 10 and outlet chamber 11, and right baffle plate 7 is separated the outlet chamber 11 and the buffer cavity 12 of giving vent to anger; Right baffle plate 7 is provided with a plurality of perforates, can be with buffer cavity 12 and outlet chamber 11 UNICOMs of giving vent to anger.Gas inlet pipe 2 is inserted in the air-inlet cavity 10 from housing 4 upper left quarters, have many row's apertures 21 on the gas inlet pipe 2, and gas inlet pipe 2 lower ends is sealed by suction tude small front apron 3; In gas outlet tube 6 inserts outlet chamber 11 from housing 4 middle lower portion, and with described outlet chamber 11 UNICOMs, gas is discharged in the atmosphere through steam outlet pipe 6; Described catalyst carrier assembly 9 is arranged in the outlet chamber 11, be connected between right baffle-plate 5 and the right baffle plate 7, and respectively with air-inlet cavity 10 with give vent to anger buffer cavity 12 UNICOMs.
With reference to Fig. 3, have many row's apertures 21 on the described gas inlet pipe 2, and sealed by suction tude small front apron 3 in gas inlet pipe 2 bottoms.Gas inlet pipe 2 is through aperture 21 and described air-inlet cavity 10 UNICOMs.
With reference to Fig. 4; Be provided with one or more catalyst carrier assemblies 9 that laterally arrange in the described outlet chamber 11; Described each catalyst carrier assembly 9 comprises the catalyst carrier 91,93 of one or more coaxial settings; Each catalyst carrier 91,93 is coated with liner 92,94, and liner outer 92,94 is coated with a shell 95.In the present embodiment, catalyst carrier assembly 9 is one, and this catalyst carrier assembly 9 is made up of 91,93 series connection of two catalyst carriers.Shell 95 in the catalyst carrier assembly 9 can be protected and clamping catalyst carrier 91,93 with liner 92,94, prevents that catalyst carrier 91,93 lost efficacy at work.
Described each catalyst carrier 91,93 is cylindrical structural, and is provided with many parallel channels 911,931 that run through both ends of the surface vertically, and the internal surface of each passage is provided with catalyst coat, and described catalyzer is that zeolite based catalysts and aluminite are catalyst based.
The working principle that the utility model is used for the SCR catalytic converter of diesel engine vent gas processing can combine Fig. 2 to explain as follows:
What should be understood that is: the foregoing description is just to the explanation of the utility model, rather than to the restriction of the utility model, any model utility that does not exceed in the utility model connotation scope is created, and all falls within the protection domain of the utility model.
Claims (3)
1. SCR catalytic converter that is used for the diesel engine vent gas reprocessing; Comprise left end cap (1), gas inlet pipe (2), suction tude small front apron (3), housing (4), right baffle-plate (5), gas outlet tube (6), right baffle plate (7), right end cap (8) and at least one catalyst carrier assembly (9); It is characterized in that described right baffle-plate (5) and right baffle plate (7) are installed in the housing (4) at interval; Housing (4) is separated into the air-inlet cavity (10) in left side, the outlet chamber (11) of centre and the buffer cavity of giving vent to anger (12) on right side; Wherein, Right baffle-plate (5) is separated air-inlet cavity (10) and outlet chamber (11), and right baffle plate (7) is separated outlet chamber (11) and the buffer cavity of giving vent to anger (12); Described right baffle plate (7) is provided with the perforate (71) of described buffer cavitys of giving vent to anger of a plurality of UNICOMs (12) and outlet chamber (11); Described gas inlet pipe (2) is inserted in the described air-inlet cavity (10) from housing (4) upper left quarter, have many row's apertures (21) on the gas inlet pipe (2), and gas inlet pipe (2) lower end is sealed by described suction tude small front apron (3); Described gas outlet tube (6) inserts in the described outlet chamber (11) from housing (4) middle lower portion, and with described outlet chamber (11) UNICOM; Described catalyst carrier assembly (9) is arranged in the outlet chamber (11), and is connected between described right baffle-plate (5) and the right baffle plate (7), and respectively with described air-inlet cavity (10) and the buffer cavity of giving vent to anger (12) UNICOM.
2. a kind of SCR catalytic converter that is used for the diesel engine vent gas reprocessing according to claim 1; It is characterized in that two or more catalyst carrier assemblies (9) laterally arrange; Described each catalyst carrier assembly (9) comprises the catalyst carrier (91,93) of one or more series connection; Each catalyst carrier (91,93) is coated with liner (92,94); Described liner (92,94) is coated with a shell (95), is provided with many parallel channels (911,931) that run through both ends of the surface in the described catalyst carrier (91,93) vertically, and the internal surface of each passage is provided with catalyst coat.
3. a kind of SCR catalytic converter that is used for the diesel engine vent gas reprocessing according to claim 2 is characterized in that described catalyst carrier (91,93) is cylindrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205751460U CN202467984U (en) | 2011-12-31 | 2011-12-31 | Selective catalytic reduction (SCR) catalytic converter for aftertreatment on tail gas of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205751460U CN202467984U (en) | 2011-12-31 | 2011-12-31 | Selective catalytic reduction (SCR) catalytic converter for aftertreatment on tail gas of diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202467984U true CN202467984U (en) | 2012-10-03 |
Family
ID=46916148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205751460U Expired - Lifetime CN202467984U (en) | 2011-12-31 | 2011-12-31 | Selective catalytic reduction (SCR) catalytic converter for aftertreatment on tail gas of diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202467984U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536399A (en) * | 2011-12-31 | 2012-07-04 | 杭州银轮科技有限公司 | SCR (Selective Catalytic Reduction) catalytic converter for post treatment of tail gas of diesel engine |
| CN104879198A (en) * | 2015-05-29 | 2015-09-02 | 潍柴动力股份有限公司 | SCR (Selective Catalytic Reduction) system and catalytic reaction unit thereof |
| US10337379B2 (en) | 2014-02-07 | 2019-07-02 | Faurecia Emissions Control Technologies, Usa, Llc | Mixer assembly for a vehicle exhaust system |
| US10787946B2 (en) | 2018-09-19 | 2020-09-29 | Faurecia Emissions Control Technologies, Usa, Llc | Heated dosing mixer |
| WO2021189795A1 (en) * | 2020-03-24 | 2021-09-30 | 天纳克（苏州）排放系统有限公司 | Diesel engine tail gas after treatment apparatus |
-
2011
- 2011-12-31 CN CN2011205751460U patent/CN202467984U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536399A (en) * | 2011-12-31 | 2012-07-04 | 杭州银轮科技有限公司 | SCR (Selective Catalytic Reduction) catalytic converter for post treatment of tail gas of diesel engine |
| US10337379B2 (en) | 2014-02-07 | 2019-07-02 | Faurecia Emissions Control Technologies, Usa, Llc | Mixer assembly for a vehicle exhaust system |
| CN104879198A (en) * | 2015-05-29 | 2015-09-02 | 潍柴动力股份有限公司 | SCR (Selective Catalytic Reduction) system and catalytic reaction unit thereof |
| US10787946B2 (en) | 2018-09-19 | 2020-09-29 | Faurecia Emissions Control Technologies, Usa, Llc | Heated dosing mixer |
| WO2021189795A1 (en) * | 2020-03-24 | 2021-09-30 | 天纳克（苏州）排放系统有限公司 | Diesel engine tail gas after treatment apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121003 |