CN204327250U - A kind of SCR catalytic muffler - Google Patents
A kind of SCR catalytic muffler Download PDFInfo
- Publication number
- CN204327250U CN204327250U CN201420694714.2U CN201420694714U CN204327250U CN 204327250 U CN204327250 U CN 204327250U CN 201420694714 U CN201420694714 U CN 201420694714U CN 204327250 U CN204327250 U CN 204327250U
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- Prior art keywords
- cavity
- dividing plate
- carrier
- partition
- pressure stabilizing
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- Expired - Lifetime
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- 230000003197 catalytic effect Effects 0.000 title claims abstract description 20
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 22
- 238000005192 partition Methods 0.000 claims abstract description 19
- 239000000969 carrier Substances 0.000 claims abstract description 9
- 239000011358 absorbing material Substances 0.000 claims description 8
- 239000002912 waste gas Substances 0.000 abstract description 11
- 238000006722 reduction reaction Methods 0.000 abstract description 9
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 4
- 230000035484 reaction time Effects 0.000 abstract description 3
- 238000004904 shortening Methods 0.000 abstract description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 12
- 231100000331 toxic Toxicity 0.000 description 5
- 230000002588 toxic effect Effects 0.000 description 5
- 230000008030 elimination Effects 0.000 description 4
- 238000003379 elimination reaction Methods 0.000 description 4
- 230000030279 gene silencing Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000013618 particulate matter Substances 0.000 description 4
- 239000002283 diesel fuel Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003584 silencer Effects 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012958 reprocessing Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 206010010219 Compulsions Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
Landscapes
- Exhaust Silencers (AREA)
Abstract
The utility model discloses a kind of SCR catalytic muffler, comprise housing, housing is provided with the head plate of suction tude and the tailgate with outlet pipe, the first dividing plate and second partition is provided with in housing, pressure stabilizing cavity is provided with, the first dividing plate in pressure stabilizing cavity and be provided with several carriers be set up in parallel between second partition between first dividing plate and second partition; Be provided with buffer cavity between head plate and the first dividing plate, be provided with exhaust cavity between tailgate and second partition, the two ends of carrier extend in buffer cavity and exhaust cavity respectively; First dividing plate is provided with the first through hole being communicated with pressure stabilizing cavity and buffer cavity, and suction tude extends in pressure stabilizing cavity.When ensureing that carrier total volume is constant and meet waste gas emission standard, the length of effective shortening carrier, while guarantee enough times of contact and reduction reaction time, high velocity air through repeatedly roundabout, continuous reflection, smooth out with the fingers genial absorption, flow velocity declines, the waste gas aerodynamic noise of being discharged by outlet pipe is declined, and reaches good noise reduction.
Description
Technical field
The utility model relates to silencing apparatus technical field, particularly relates to a kind of SCR catalytic muffler.
Background technique
State compulsion carries out state IV emission standard, and post-processing technology is faced with severe tests.At present, the limit value of state IV emission regulation demands nitrogen oxide (NOx) is 3.5g/ (kWh), and the limit value of particulate matter (PM) is 0.03g/ (kWh).And the analytical data of relevant departments is bright, diesel-oil vehicle is the main source of nitrogen oxide (NOx) and particulate matter (PM) these two kinds of pollutants.On existing diesel-oil vehicle, usually adopt device after-treatment system, reduce this pollutant discharge; On the other hand, raising travelling comfort required along with Consumer, noise problem also gradually pay close attention to by everybody.And on diesel-oil vehicle, except engine body noise, the contribution amount of aerodynamic noise in car load noise of vent systems is also very large.The technological means of now conventional reduction exhaust sound is device exhaust silencer in vent systems.
As everyone knows, on the truck of lift-launch diesel engine, the layout of each component closely, will be loaded after-treatment system and exhaust silencer simultaneously, need very large space, be usually difficult to the installation that enough spaces meet free-standing reprocessing and silencing apparatus.Therefore, the SCR catalytic muffler being integrated with after-treatment system and exhaust silencer function arises at the historic moment, and can meet the requirement of discharge and noise simultaneously.Further, due to the restriction of length on truck, usually box SCR catalytic muffler is adopted.Be mostly tandem carrier structure at present, carrier approximately occupies 40% of SCR catalytic muffler overall length in the longitudinal direction, and Carrier diameters also occupies the area in cross section about 1/3.And in the design of silencing apparatus, the soundproof effect of mazy type pipeline is better, but box integrated length direction is very short, limits the design of this pipeline.Therefore, for integrated form SCR catalytic muffler, reprocessing carrier volume used can ensure, but the area of noise elimination cavity is relatively very little, causes the target of discharging to realize, is but difficult to the requirement simultaneously taking into account noise.
In the design and checking of SCR catalytic muffler, discharge, crystallization, engine performance and noise are separate, and any one does not reach target all can not become setting scheme.And current mentality of designing, often give priority to emission problem, existing space but can only be utilized to arrange for noise and be difficult to noise elimination cavity meet corresponding noise requirements.The SCR catalytic muffler of coupling state IV utilizes packaged tandem carrier, when the later stage carries out noise optimization, carrier part almost can not be changed, and this tandem carrier occupies the most of space in SCR catalytic muffler, this just makes silencing cavity that very little space can only be utilized to arrange, its optimization is very restricted, and increases technical difficulty, is difficult to carry out.
Model utility content
The purpose of this utility model is to provide a kind of SCR catalytic muffler, under limited installing space, meets the effect that toxic emission meets standard and reduces aerodynamic noise simultaneously.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of SCR catalytic muffler, comprise housing, the two ends of described housing are respectively equipped with a plate and tailgate, described head plate is provided with the suction tude extended in described housing, described tailgate is provided with outlet pipe, the first dividing plate and second partition is provided with in described housing, pressure stabilizing cavity is provided with between described first dividing plate and described second partition, be provided with several carriers be set up in parallel between described first dividing plate in described pressure stabilizing cavity and described second partition, each described carrier is equipped with air-inlet cavity;
Be provided with buffer cavity between described head plate and described first dividing plate, be provided with exhaust cavity between described tailgate and described second partition, the two ends of described carrier extend in described buffer cavity and described exhaust cavity respectively;
Described first dividing plate is provided with the first through hole of the described pressure stabilizing cavity of some connections and described buffer cavity, and described suction tude extends in described pressure stabilizing cavity.
Improve as one, the described suction tude circumference being positioned at described pressure stabilizing cavity is provided with some second through holes.
As further improvement, described carrier is two that are set up in parallel, and carrier described in two lays respectively on two corners of described housing subtend setting, and described in described suction tude and two, carrier is triangularly arranged.
As further improving, described tailgate is provided with sound absorbing material.
Owing to have employed technique scheme, the beneficial effects of the utility model are:
Owing to being provided with several carriers be set up in parallel between the first dividing plate and second partition, thus at limited installing space with when ensureing that carrier total volume is constant, the length of effective shortening carrier, while guarantee enough times of contact and reduction reaction time, for the layout of noise elimination cavity and pipeline reserves more space, and then waste gas fully mixes at air inlet pressure stabilizing cavity with adding together with blue solution of spraying into, the first through hole on the first dividing plate enters in buffer cavity, back blast head plate loss portion of energy, carrier generation reduction reaction is flowed through after reflection, air-flow smoothed out with the fingers in carrier along after, flow velocity declines, finally flow into exhaust cavity through air-inlet cavity, air-flow passes through expansion in exhaust cavity, energy dissipation, smooth out with the fingers along after gas shock tailgate and the sound absorbing material of inside, part acoustic energy is absorbed, medium-high frequency section noise is decayed at this, finally discharge through outlet pipe.In this process, high velocity air through repeatedly roundabout, continuous reflection, smooth out with the fingers genial absorption, flow velocity decline, the waste gas aerodynamic noise of being discharged by outlet pipe is declined greatly, reaches good noise reduction; Meanwhile, the surge pressure of the waste gas after current stabilization to shell wall side and internal structure diminishes, and the noise that SCR catalytic muffler causes structural vibration to give off due to waste gas also can reduce; On the other hand, compared with tradition, in original constancy of volume with under ensureing the standard compliant situation of toxic emission, do not need to carry out complicated layout and can reach desirable aerodynamic noise attenuating, the exhaust back pressure of toxic emission can be well controlled, the balanced contradiction of acoustic attenuation performance and exhaust back pressure.
Because suction tude circumference is provided with some second through holes, thus by the second through hole, pressure stabilization function is played to waste gas, for follow-up work is laid a good foundation.
Because two carriers lay respectively on two corners of housing subtend setting, connection and reasonable arrangement, space is fully used, and adopts this structure also suitably can expand the volume of carrier simultaneously.
Because tailgate is provided with sound absorbing material, thus further increase soundproof effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the structural representation of A-A in Fig. 1;
Fig. 3 is the explosive view of Fig. 1;
In figure, 1-housing; 2-suction tude; 3-outlet pipe; 4-head plate; 5-first dividing plate; 6-air-inlet cavity; 7-pressure stabilizing cavity; 8-carrier; 9-second partition; 10-through hole; 11-exhaust cavity; 12-buffer cavity; 13-tailgate; 14-sound absorbing material; 15-through hole.
Embodiment
In order to make the purpose of this utility model, technological scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
As Fig. 1 to Fig. 3 jointly shown in, a kind of SCR catalytic muffler comprises housing 1, the two ends of this housing 1 are respectively equipped with a plate 4 and tailgate 13, this plate 4 is provided with the suction tude 2 extended in housing 1, this tailgate 13 is provided with outlet pipe 3, the first dividing plate 5 and second partition 9 is provided with in this housing 1, pressure stabilizing cavity 7 is provided with between this first dividing plate 5 and second partition 9, the first dividing plate 5 in pressure stabilizing cavity 7 and be provided with several carriers 8 be set up in parallel between second partition 9, each carrier 8 is equipped with air-inlet cavity 6; Be provided with buffer cavity 12 between this plate 4 and first dividing plate 5, be provided with exhaust cavity 11 between this tailgate 13 and second partition 9, the two ends of this carrier 8 extend in buffer cavity 12 and exhaust cavity 11 respectively.
This first dividing plate 5 is provided with the first through hole of some connection pressure stabilizing cavities 7 and buffer cavity 12, this first logical sky is through hole 15, this suction tude 2 extends in pressure stabilizing cavity 7, and suction tude 2 circumference being positioned at pressure stabilizing cavity 7 is provided with some second through holes, and this second through hole is through hole 10.
In the design, this carrier 8 is two of being set up in parallel, and two carriers 8 lay respectively on two corners that housing 1 subtend arranges, and this suction tude 2 and two carriers 8 are triangularly arranged.
The side this tailgate 13 being positioned at housing 1 is provided with sound absorbing material 14, and this sound absorbing material 14 is the material that can realize sound absorption function as the technician of ability.
In actual applications, owing to being provided with several carriers 8 be set up in parallel between the first dividing plate 5 and second partition 9, thus at limited installing space with when ensureing that carrier 8 total volume is constant, the length of effective shortening carrier 8, while guarantee enough times of contact and reduction reaction time, for the layout of noise elimination cavity and pipeline reserves more space, and then waste gas fully mixes at air inlet pressure stabilizing cavity 7 with adding together with blue solution of spraying into, through hole 15 on the first dividing plate 5 enters in buffer cavity 12, back blast head plate 4 loss portion of energy, after reflection, flow through carrier 8 reduction reaction occurs, air-flow smoothed out with the fingers in carrier 8 along after, flow velocity declines, finally flow into exhaust cavity 11 through air-inlet cavity 6, air-flow passes through expansion in exhaust cavity 11, energy dissipation, smooth out with the fingers along after gas shock tailgate and the sound absorbing material of inside, part acoustic energy is absorbed, medium-high frequency section noise is decayed at this, finally discharge through outlet pipe.In this process, high velocity air through repeatedly roundabout, continuous reflection, smooth out with the fingers genial absorption, flow velocity decline, the waste gas aerodynamic noise of being discharged by outlet pipe 3 is declined greatly, reaches good noise reduction; Meanwhile, the surge pressure of the waste gas after current stabilization to housing 1 wall and internal structure diminishes, and the noise that SCR catalytic muffler causes structural vibration to give off due to waste gas also can reduce; On the other hand, compared with tradition, in original constancy of volume with under ensureing the standard compliant situation of toxic emission, do not need to carry out complicated layout and can reach desirable aerodynamic noise attenuating, the exhaust back pressure of toxic emission can be well controlled, the balanced contradiction of acoustic attenuation performance and exhaust back pressure.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (4)
1. a SCR catalytic muffler, comprise housing (1), the two ends of described housing (1) are respectively equipped with a plate (4) and tailgate (13), described head plate (4) is provided with the suction tude (2) extended in described housing (1), described tailgate (13) is provided with outlet pipe (3), it is characterized in that, the first dividing plate (5) and second partition (9) is provided with in described housing (1), pressure stabilizing cavity (7) is provided with between described first dividing plate (5) and described second partition (9), be positioned at several carriers (8) being provided with between described first dividing plate (5) of described pressure stabilizing cavity (7) and described second partition (9) and being set up in parallel, each described carrier (8) is equipped with air-inlet cavity (6),
Buffer cavity (12) is provided with between described head plate (4) and described first dividing plate (5), be provided with exhaust cavity (11) between described tailgate (13) and described second partition (9), the two ends of described carrier (8) extend in described buffer cavity (12) and described exhaust cavity (11) respectively;
Described first dividing plate (5) is provided with the first through hole of the described pressure stabilizing cavity of some connections (7) and described buffer cavity (12), and described suction tude (2) extends in described pressure stabilizing cavity (7).
2. a kind of SCR catalytic muffler according to claim 1, is characterized in that, described suction tude (2) circumference being positioned at described pressure stabilizing cavity (7) is provided with some second through holes.
3. a kind of SCR catalytic muffler according to claim 1 and 2, it is characterized in that, described carrier (8) is two of being set up in parallel, carrier described in two (8) lays respectively on two corners of described housing (1) subtend setting, and described in described suction tude (2) and two, carrier (8) is triangularly arranged.
4. a kind of SCR catalytic muffler according to claim 3, is characterized in that, described tailgate (13) is provided with sound absorbing material (14).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201420694714.2U CN204327250U (en) | 2014-11-18 | 2014-11-18 | A kind of SCR catalytic muffler |
Applications Claiming Priority (1)
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CN201420694714.2U CN204327250U (en) | 2014-11-18 | 2014-11-18 | A kind of SCR catalytic muffler |
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CN204327250U true CN204327250U (en) | 2015-05-13 |
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CN201420694714.2U Expired - Lifetime CN204327250U (en) | 2014-11-18 | 2014-11-18 | A kind of SCR catalytic muffler |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108019258A (en) * | 2016-11-04 | 2018-05-11 | 天纳克(苏州)排放系统有限公司 | Box-type tail-gas after treatment apparatus |
CN110685781A (en) * | 2019-11-14 | 2020-01-14 | 清华大学苏州汽车研究院(吴江) | Tail gas treatment device |
WO2020029008A1 (en) * | 2018-08-06 | 2020-02-13 | 臧志成 | Separator plate forming method |
-
2014
- 2014-11-18 CN CN201420694714.2U patent/CN204327250U/en not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108019258A (en) * | 2016-11-04 | 2018-05-11 | 天纳克(苏州)排放系统有限公司 | Box-type tail-gas after treatment apparatus |
WO2020029008A1 (en) * | 2018-08-06 | 2020-02-13 | 臧志成 | Separator plate forming method |
CN110685781A (en) * | 2019-11-14 | 2020-01-14 | 清华大学苏州汽车研究院(吴江) | Tail gas treatment device |
CN110685781B (en) * | 2019-11-14 | 2024-05-14 | 清华大学 | Tail gas treatment device |
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C14 | Grant of patent or utility model | ||
GR01 | Patent grant |