CN203347898U - Integrated selective catalytic reduction (SCR) catalytic silencer - Google Patents
Integrated selective catalytic reduction (SCR) catalytic silencer Download PDFInfo
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- CN203347898U CN203347898U CN 201320402718 CN201320402718U CN203347898U CN 203347898 U CN203347898 U CN 203347898U CN 201320402718 CN201320402718 CN 201320402718 CN 201320402718 U CN201320402718 U CN 201320402718U CN 203347898 U CN203347898 U CN 203347898U
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Abstract
The utility model relates to an integrated selective catalytic reduction (SCR) catalytic silencer which comprises a casing, front and rear baffles are arranged in the middle of an inner cavity of the casing, the inner cavity of the casing is divided into a gas inlet cavity, a mixing cavity and a gas outlet cavity by the two baffles, an inward inserting pipe which is communicated with a gas inlet pipe through a transitional connection plate is disposed in the casing, a nozzle holder is mounted on the transitional connection plate, the inward inserting pipe penetrates the gas inlet cavity and the front baffle to enter into the mixing cavity, a plurality of inward through holes communicated with the mixing cavity are formed in the walls of the inward inserting pipe, a plurality of baffle through holes are formed in the front baffle, a carrier channel which runs through the mixing cavity and the two baffles is communicated between the gas inlet cavity and the gas outlet cavity, and catalytic carriers are contained in the carrier channel. By means of the integrated SCR catalytic silencer, fully atomized mixture of a urea water solution with tail gas is facilitated, the nitrogen oxygen conversion efficiency can be remarkably increased, the noise reduction effect is good, the urea nozzle holder is integrated with the catalytic silencer, simple assembly of a urea nozzle is convenient, mounting angle requirements can be precisely guaranteed, and urea crystallization can be effectively eliminated.
Description
Technical field
The utility model relates to a kind of integrated form SCR catalytic muffler.
Background technique
The SCR technology is one of main post-processing technology of eliminating nitrogen oxide in diesel exhaust gas.Mainly be divided into control unit, urea supply unit and catalytic reaction unit three parts according to function.The control unit of SCR system and the control unit of motor (ECU) integrate, mainly for carrying out the SCR control strategy, and control the urea supply unit according to sensor signals such as ambient temperature, delivery temperature, urea level, urea temperature, urea pressure, NOx concentration, spraying urea liquid is mapped in exhaust airstream according to demand at regular time and quantity; The urea supply unit mainly comprises urea box, urea batching unit, urea-spray unit, heating module and connecting pipeline and circuit, guarantees abundant atomization and the decomposition of urea liquid; The catalytic reaction unit is also referred to as the SCR catalytic muffler, and it mainly comprises SCR catalyzer, carrier and silencing apparatus package structure thereof, and its effect is to be the nitrogen G&W by the main harmful components reduction of nitrogen oxide in diesel exhaust gas.
Existing SCR system is that the urea nozzle seat is arranged on SCR exhaust dedicated pipe, SCR exhaust dedicated pipe directly and the SCR catalytic muffler weld together, do not need to connect with flange.The urea nozzle seat must have certain length to meet the requirement that urea mixes with the SCR dedicated vent pipes between the SCR catalytic muffler, longer like this SCR dedicated vent pipes heat radiation is very fast, heat insulation effect is poor, easily in urea nozzle seat and SCR dedicated vent pipes, form urea crystals, in this technological scheme, need to consider respectively the installation of SCR catalytic muffler and urea nozzle seat, be unfavorable for the layout of SCR system on car load, and aqueous solution of urea has corrosivity, cause the SCR dedicated vent pipes must use expensive stainless steel material, increased the cost of SCR system.In addition, in this technological scheme, in SCR catalytic muffler inside, urea mixes apart from shorter with exhaust, and atomization is poor, and, without the specialized designs noise-reducing structure, noise reduction is poor.
The model utility content
The technical problems to be solved in the utility model is to provide a kind of simple in structure, with low cost, excellent catalytic effect, integrated form SCR catalytic muffler that decrease of noise functions is strong.
For solving the problems of the technologies described above, integrated form SCR catalytic muffler of the present utility model comprises that front end is connected with the housing that suction tude, rear end are connected with outlet pipe, be provided with catalytic carrier in housing, its structural feature is to be provided with forward and backward two dividing plates and two dividing plates in described housing the housing inner chamber is separated into to anterior air-inlet cavity, middle mixing chamber and the outlet chamber at rear portion; Be provided with the interpolation pipe be communicated with suction tude by transition connecting disc in housing, transition connecting disc is provided with nozzle carrier, interpolation pipe is passed in mixing chamber after passing air-inlet cavity and front dividing plate, and the opening that offers a plurality of interior perforation that are communicated with mixing chamber and interpolation pipe tail end on the tube wall of interpolation pipe afterbody is sealed by rear bulkhead; Offer a plurality of bulkhead through-holes on front dividing plate; Be communicated with the carrier passage that crosses mixing chamber between air-inlet cavity and outlet chamber, described catalytic carrier is located in the carrier passage.
The depressed part of quieter material is outwards heaved and be formed for filling in housing to the part of the rear end cover of described housing, and the open-mouth of depressed part is packaged with on orifice plate and orifice plate and is densely covered with a plurality of micropores that are communicated with depressed part.
Described quieter material is silencing cotton.
Described outlet pipe is connected on the rear end cover of housing, offers the orifice plate through hole be communicated with outlet pipe on described orifice plate.
On described transition connecting disc, block temperature sensor is installed.
Be connected with the nitrogen oxide sensor seat on described outlet pipe.
Adopt said structure, nozzle carrier is for installing urea nozzle, aqueous solution of urea meets at interpolation pipe with tail gas from the urea nozzle ejection, then aqueous solution of urea and tail gas carry out mixed aerosol in mixing chamber, enter air-inlet cavity by the bulkhead through-hole on front dividing plate again, enter outlet chamber through the carrier passage more afterwards, finally discharged by outlet pipe again; Interpolation pipe is offered the structure of a plurality of interior perforation, has guaranteed that aqueous solution of urea mixes with the abundant atomization of tail gas; Suction tude and diesel engine exhaust are by clip connected, and the transition connecting disc that suction tude designs by bias with interpolation pipe is connected with welding manner, and wherein nozzle carrier and block temperature sensor are welded on transition connecting disc; Comprise at least one carrier in the carrier passage, arrange with the interpolation pipe parallel to an axis, dividing plate before and after connecting, communicate with air-inlet cavity, outlet chamber; On orifice plate, the some micropores of design, fill silencing cotton between orifice plate and rear end cover, can reach noise reduction preferably.
Visible, the utility model is conducive to aqueous solution of urea and mixes with the abundant atomization of tail gas air-flow, can significantly improve nitrogen oxygen transformation efficiency, has good noise reduction simultaneously.On transition connecting disc, integrated urea nozzle toilet, in the simple installation of urea nozzle, can accurately guarantee the setting angle requirement in addition, effectively eliminates urea crystals.
The accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
Fig. 1 is perspective view of the present utility model;
The perspective view at another visual angle that Fig. 2 is Fig. 1;
The structural representation that Fig. 3 is orifice plate of the present utility model;
The structural representation that Fig. 4 is transition connecting disc of the present utility model.
Embodiment
With reference to accompanying drawing, a kind of mode of execution of integrated form SCR catalytic muffler of the present utility model is to comprise that front end is connected with the housing 1 that suction tude 2, rear end are connected with outlet pipe 3, be provided with catalytic carrier in housing 1, the middle part of housing 1 inner chamber is provided with forward and backward two dividing plates and two dividing plates are separated into anterior air-inlet cavity 4, the mixing chamber 5 of centre and the outlet chamber 6 at rear portion by the housing inner chamber; Be provided with the interpolation pipe 8 be communicated with suction tude 2 by transition connecting disc 7 in housing, transition connecting disc 7 is provided with nozzle carrier 9, be passed in mixing chamber 5 after interpolation pipe 8 passes air-inlet cavity 4 and front dividing plate 10, offer the opening of a plurality of interior perforation 12 that are communicated with mixing chamber 5 and interpolation pipe 8 tail ends on the tube wall of interpolation pipe 8 by rear bulkhead 11 sealings; On front dividing plate 10, offer a plurality of for being communicated with the bulkhead through-hole 13 of mixing chamber 5 and air-inlet cavity 4; Be communicated with the carrier passage 14 that crosses mixing chamber 5 between air-inlet cavity 4 and outlet chamber 6, described catalytic carrier is located in carrier passage 14.Block temperature sensor 19 is installed on transition connecting disc 7.Be connected with nitrogen oxide sensor seat 20 on outlet pipe 3.
With reference to accompanying drawing, in said structure, nozzle carrier 9 is for installing urea nozzle, aqueous solution of urea meets at interpolation pipe with tail gas from the urea nozzle ejection, then aqueous solution of urea and tail gas carry out mixed aerosol in mixing chamber 5, enter air-inlet cavity 4 by the bulkhead through-hole 13 on front dividing plate 10 again, enter outlet chamber 6 through carrier passage 14 more afterwards, finally discharged by outlet pipe 3 again.Wherein, suction tude 2 is with diesel engine exhaust by clip connected, and the transition connecting disc 7 that suction tude 2 designs by bias with interpolation pipe 8 is connected with welding manner, and nozzle carrier 9 and block temperature sensor 19 are welded on transition connecting disc 3.Interpolation pipe 8 is offered the structure of a plurality of interior perforation 12, has guaranteed that aqueous solution of urea mixes with the abundant atomization of tail gas; Comprise at least one carrier in carrier passage 14, with interpolation pipe 8 parallel to an axis settings, dividing plate before and after connecting, communicate with air-inlet cavity 4, outlet chamber 6.
With reference to accompanying drawing, the depressed part of quieter material is outwards heaved and be formed for filling in housing 1 to the part of the rear end cover 15 of housing 1, and the open-mouth of depressed part is packaged with on orifice plate 16 and orifice plate 16 and is densely covered with a plurality of micropores that are communicated with depressed part 17.Wherein, quieter material can adopt silencing cotton or other to have the packing material of silencing function.This part-structure is mainly used in noise reduction, and the absorption by quieter material to noise can reduce exhaust sound greatly.Outlet pipe 3 is connected on the rear end cover 15 of housing 1, offers the orifice plate through hole 18 be communicated with outlet pipe 3 on orifice plate 16.Offering for reserving the link position of outlet pipe 3 of orifice plate through hole 18.
In sum, the utility model is not limited to above-mentioned embodiment.Those skilled in the art, under the prerequisite that does not break away from spirit and scope of the present utility model, can do some changes and modification.Protection domain of the present utility model should be as the criterion with claim of the present utility model.
Claims (7)
1. an integrated form SCR catalytic muffler, comprise that front end is connected with the housing (1) that suction tude (2), rear end are connected with outlet pipe (3), housing is provided with catalytic carrier in (1), it is characterized in that in described housing (1) being provided with forward and backward two dividing plates and two dividing plates the housing inner chamber is separated into to anterior air-inlet cavity (4), middle mixing chamber (5) and the outlet chamber (6) at rear portion; Be provided with the interpolation pipe (8) be communicated with suction tude (2) by transition connecting disc (7) in housing (1), transition connecting disc (7) is provided with nozzle carrier (9), interpolation pipe (8) is passed in mixing chamber (5) after passing air-inlet cavity (4) and front dividing plate (10), and the opening that offers a plurality of interior perforation (12) that are communicated with mixing chamber (5) and interpolation pipe (8) tail end on the tube wall of interpolation pipe (8) afterbody is sealed by rear bulkhead (11); Offer a plurality of bulkhead through-holes (13) on front dividing plate (10); Be communicated with the carrier passage (14) that crosses mixing chamber (5) between air-inlet cavity (4) and outlet chamber (6), described catalytic carrier is located in carrier passage (14).
2. integrated form SCR catalytic muffler as claimed in claim 1, it is characterized in that the part of the rear end cover (15) of described housing (1) outwards heaves and be formed for filling in housing (1) depressed part of quieter material, the open-mouth of depressed part is packaged with on orifice plate (16) and orifice plate (16) and is densely covered with a plurality of micropores that are communicated with depressed part (17).
3. integrated form SCR catalytic muffler as claimed in claim 2, is characterized in that described quieter material is silencing cotton.
4. integrated form SCR catalytic muffler as claimed in claim 2, is characterized in that described outlet pipe (3) is connected on the rear end cover (15) of housing (1), offers the orifice plate through hole (18) be communicated with outlet pipe (3) on described orifice plate (16).
5. integrated form SCR catalytic muffler as described as any one in claim 1 to 4, is characterized in that on described transition connecting disc (7) being equipped with block temperature sensor (19).
6. integrated form SCR catalytic muffler as described as any one in claim 1 to 4, is characterized in that on described outlet pipe (3) being connected with nitrogen oxide sensor seat (20).
7. integrated form SCR catalytic muffler as claimed in claim 5, is characterized in that on described outlet pipe (3) being connected with nitrogen oxide sensor seat (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320402718 CN203347898U (en) | 2013-07-08 | 2013-07-08 | Integrated selective catalytic reduction (SCR) catalytic silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320402718 CN203347898U (en) | 2013-07-08 | 2013-07-08 | Integrated selective catalytic reduction (SCR) catalytic silencer |
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| Publication Number | Publication Date |
|---|---|
| CN203347898U true CN203347898U (en) | 2013-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320402718 Expired - Lifetime CN203347898U (en) | 2013-07-08 | 2013-07-08 | Integrated selective catalytic reduction (SCR) catalytic silencer |
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| CN (1) | CN203347898U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742242A (en) * | 2013-12-25 | 2014-04-23 | 潍柴动力股份有限公司 | SCR (Selective Catalytic Reduction) catalytic muffler and air outlet pipe thereof |
| CN104047687A (en) * | 2014-07-03 | 2014-09-17 | 中国重汽集团济南动力有限公司 | Catalytic conversion device for heavy-duty vehicle |
| WO2017032231A1 (en) * | 2015-08-21 | 2017-03-02 | 天纳克（苏州）排放系统有限公司 | Exhaust gas treatment 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 |
| CN108131182A (en) * | 2017-12-23 | 2018-06-08 | 无锡威孚力达催化净化器有限责任公司 | For the mixer of SCR post processings |
| CN108868983A (en) * | 2018-05-28 | 2018-11-23 | 安徽江淮汽车集团股份有限公司 | A kind of integrated form SCR assembly |
| WO2022007516A1 (en) * | 2020-07-07 | 2022-01-13 | 无锡威孚力达催化净化器有限责任公司 | Structure for improving accuracy of box-type post-treatment nitrogen oxide compound measuring point |
-
2013
- 2013-07-08 CN CN 201320402718 patent/CN203347898U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742242A (en) * | 2013-12-25 | 2014-04-23 | 潍柴动力股份有限公司 | SCR (Selective Catalytic Reduction) catalytic muffler and air outlet pipe thereof |
| CN103742242B (en) * | 2013-12-25 | 2016-05-11 | 潍柴动力股份有限公司 | A kind of SCR catalytic muffler and escape pipe thereof |
| CN104047687A (en) * | 2014-07-03 | 2014-09-17 | 中国重汽集团济南动力有限公司 | Catalytic conversion device for heavy-duty vehicle |
| WO2017032231A1 (en) * | 2015-08-21 | 2017-03-02 | 天纳克（苏州）排放系统有限公司 | Exhaust gas treatment 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 |
| CN108131182A (en) * | 2017-12-23 | 2018-06-08 | 无锡威孚力达催化净化器有限责任公司 | For the mixer of SCR post processings |
| CN108868983A (en) * | 2018-05-28 | 2018-11-23 | 安徽江淮汽车集团股份有限公司 | A kind of integrated form SCR assembly |
| CN108868983B (en) * | 2018-05-28 | 2019-12-17 | 安徽江淮汽车集团股份有限公司 | Integrated SCR assembly |
| WO2022007516A1 (en) * | 2020-07-07 | 2022-01-13 | 无锡威孚力达催化净化器有限责任公司 | Structure for improving accuracy of box-type post-treatment nitrogen oxide compound measuring point |
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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 |
Granted publication date: 20131218 |
|
| CX01 | Expiry of patent term |