CN205445746U - Mixer for promoting atomization of aqueous solution of urea - Google Patents
Mixer for promoting atomization of aqueous solution of urea Download PDFInfo
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- CN205445746U CN205445746U CN201620125403.3U CN201620125403U CN205445746U CN 205445746 U CN205445746 U CN 205445746U CN 201620125403 U CN201620125403 U CN 201620125403U CN 205445746 U CN205445746 U CN 205445746U
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Abstract
The utility model relates to a diesel engine exhaust system technical field provides a promote atomizing blender of urea aqueous solution. Including outer tube, inner tube, preceding guide plate and back guide plate, be equipped with the mount pad on the lateral wall of outer tube, the mount pad is located the front end of inner tube, be equipped with a plurality of through -holes on the pipe wall of inner tube, preceding guide plate lies in the front end of inner tube, the external diameter and the outer bore of pipe looks adaptation of preceding guide plate, be equipped with on the preceding guide plate with the hole of the external diameter looks adaptation of inner tube, one side edge that the mount pad was kept away from to the hole is equipped with the trompil, the inner tube passes the hole, back guide plate is located the rear end of inner tube, is equipped with the clearance between the edge of back guide plate and the pipe wall of inner tube. The utility model discloses the reverse disturbing action of promote atomizing blender of urea aqueous solution make full use of diesel engine exhaust air current, make the urea solution atomizing that gets into this blender and with the diesel exhaust intensive mixing to can effectively prevent ureal deposit, have advantages such as simple structure, urea solution atomization effect is good, gas mixing is even.
Description
Technical field
This utility model belongs to diesel engine exhaust system technical field, particularly relates to a kind of blender promoting aqueous solution of urea to be atomized.
Background technology
Currently used reduction exhaust emissions technology has two kinds, a kind of is SCR (SCR) technology by the outer catalyzing and reducing nitrogen oxides of emission controls by improving combustion microgranule and machine, and another kind is to filter microparticle technologies by particulate trap outside the EGR (engines exhaust gas recirculation) by emission controls by improving combustion nitrogen oxides and machine.The needs that state IV discharge standard specifies are implemented for adapting to heavy-duty diesel oil commercial car and large diesel engine, supply and the reality of the aspect such as the economy of vehicle production operation and vehicular emission standards in conjunction with China Diesel, for reducing above-mentioned diesel car and the discharge of diesel engine nitrogen oxides, the after-treatment system of heavy-duty diesel oil commercial car and large diesel engine aerofluxus have employed " SCR " technology.So-called " SCR " technology, refers to selective catalytic reduction system operating.SCR system work process is to spray in exhaustor by aqueous solution of urea by ejector pump and nozzle, mix in exhaustor with tail gas, mixed gas enters catalyst converter, under the common effect of the catalyst on high-temperature gas with catalyst converter of the carbamide atomized liquid in tail gas, accelerated decomposition becomes ammonia, ammonia reacts with the nitrogen oxides in tail gas again, generates nitrogen and discharges, thus reduces the content of nitrogen oxide in tail gas so that reaching discharge standard.
Blender is the parts that the aqueous solution of urea ejecting urea nozzle carries out that atomization is decomposed and mixed with diesel exhaust gas.The nitrogen oxides that in prior art, blender uses inside and outside two-layer perforated pipe, aqueous solution of urea and diesel engine to discharge can carry out being atomized for the first time at inner pipe wall, and under the outer perforation effect of outer tube, carry out second time and be atomized, subsequently into inlet chamber.This structure is easily generated urea crystals, and carbamide is poor with waste gas mixing uniformity, and the conversion efficiency causing SCR case is low.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of blender promoting aqueous solution of urea to be atomized, the blender of this promotion aqueous solution of urea atomization makes full use of the reverse perturbation action of diesel exhaust gas air-flow, promote to enter the aqueous solution of urea atomization of this blender and the waste gas with diesel engine discharge is sufficiently mixed, can effectively prevent the depositional phenomenon of carbamide, there is the advantage such as simple in construction, good, the gas mix homogeneously of aqueous solution of urea atomizing effect.
For solving above-mentioned technical problem, the technical solution of the utility model is:
Promote the blender of aqueous solution of urea atomization, including the outer tube of both ends open be fixedly installed on the inner tube of described outer tube, the front flow guiding plate also including being arranged on described outer tube and rear deflector；The sidewall of described outer tube is provided with mounting seat, and described mounting seat is positioned at the front end of said inner tube；The tube wall of said inner tube is provided with multiple through hole；Described front flow guiding plate is positioned at the front end of said inner tube, the external diameter of described front flow guiding plate is suitable with the internal diameter of described outer tube, described front flow guiding plate is provided with the endoporus suitable with the external diameter of said inner tube, described endoporus is provided with perforate away from a lateral edges of described mounting seat, and said inner tube passes described endoporus；Described rear deflector is positioned at the rear end of said inner tube, is provided with gap between edge and the tube wall of said inner tube of described rear deflector.
As a kind of improved plan, described outer tube and said inner tube eccentric setting, said inner tube is provided with the side of described mounting seat near described outer tube.
As a kind of improved plan, the front end of said inner tube is the toroidal smoothly transitted.
As a kind of improved plan, multiple described through hole concentrated settings are in the said inner tube side relative with described mounting seat.
As a kind of improved plan, described mounting seat is inclined on described outer tube.
As a kind of improved plan, described rear deflector is provided with the locating slot of fixing said inner tube.
Owing to have employed technique scheme, the beneficial effects of the utility model are:
Promote the blender of aqueous solution of urea atomization, including the outer tube of both ends open be fixedly installed on the inner tube of outer tube, the front flow guiding plate also including being arranged on outer tube and rear deflector；The sidewall of outer tube is provided with mounting seat, and mounting seat is positioned at the front end of inner tube；The tube wall of inner tube is provided with multiple through hole；Front flow guiding plate is positioned at the front end of inner tube, and the external diameter of front flow guiding plate is suitable with the internal diameter of outer tube, and front flow guiding plate is provided with the endoporus suitable with the external diameter of inner tube, and a lateral edges of the remotely mounted seat of endoporus is provided with perforate, and inner tube passes endoporus；Rear deflector is positioned at the rear end of inner tube, is provided with gap between edge and the tube wall of inner tube of rear deflector.The blender promoting aqueous solution of urea atomization is provided with mounting seat, and during use, urea nozzle is arranged in mounting seat, it is achieved that urea nozzle mounting seat and the Integrated design of blender and optimization, and simple in construction, low cost of manufacture.Aqueous solution of urea is ejected in the inner tube of blender via urea nozzle.The diesel exhaust entering blender is divided into two-way when running into inner tube, and a curb inner tube flows backward and mixes with the aqueous solution of urea being ejected in inner tube, and aqueous solution of urea runs into the waste gas of high temperature and mixes by rapid atomization and with waste gas.The aqueous solution of urea not being atomized will be attached in inner tube corresponding aqueous solution of urea at wall point.Another road waste gas Cavity Flow between outer tube and inner tube, when running into the stop of front flow guiding plate, forces waste gas can only concentrate through front flow guiding plate via the perforate of front flow guiding plate.Now waste gas quickly through perforate and to aqueous solution of urea wall point flow about, portion passes through the through hole near wall point and enters inner tube disturbance first via waste gas, under the common disturbance, percussion of two strands of air-flows, the aqueous solution of urea be not rebuffed is promoted fully to be atomized, the aqueous solution of urea be rebuffed also is cleared up in time and is atomized, and be sufficiently mixed with waste gas, effectively prevent deposition and the crystallization of aqueous solution of urea.The mixed gas of two-way inside and outside inner tube continues the output flow to the blender promoting aqueous solution of urea atomization.Mixed gas in inner tube is after running into during deflector, stop due to rear flow-stopping plate, major part mixed gas is forced to enter the space between inner and outer tubes along rear deflector, strong impact and disturbance is produced with the second tunnel mixed gas, promote further the atomization of aqueous solution of urea and improve the mixing uniformity of aqueous solution of urea and waste gas, being finally reached that aqueous solution of urea atomizing effect is good, the effect of gas mix homogeneously.In this design, front flow guiding plate also has support and the effect of fixing inner tube, simple in construction, is suitable to practicality.This utility model promotes that the blender of aqueous solution of urea atomization makes full use of the reverse perturbation action of diesel exhaust gas air-flow, promote enter the aqueous solution of urea atomization of this blender and be sufficiently mixed with diesel exhaust, and can effectively prevent deposition and the crystallization of carbamide, there is the advantage such as simple in construction, good, the gas mix homogeneously of aqueous solution of urea atomizing effect.
Due to outer tube and inner tube eccentric setting, inner tube is provided with the side of mounting seat near outer tube, make aqueous solution of urea that urea nozzle sprays inner tube the wall point front end closer to inner tube, make that diesel exhaust is higher in temperature, speed time meet with aqueous solution of urea, the atomizing effect making aqueous solution of urea is more preferable, and the gas after atomization mixes evenly with waste gas.
Owing to the front end of inner tube is the toroidal smoothly transitted so that after urea nozzle is installed in mounting seat, the aqueous solution of urea of ejection is easier to enter in inner tube, and jeting effect is more preferable, it is simple to the subsequent atomization of aqueous solution of urea and mixing.
Owing to multiple through hole concentrated settings are in the inner tube side relative with mounting seat, this second road, position simulation model for mixing gases flows is fastest.During the stop of the first via mixed gas flow-stopping plate after running in inner tube, first via mixed gas major part via through holes enters between inner and outer tubes, further mixed aerosol in this space, improve aqueous solution of urea atomization and with the mixing uniformity of waste gas.
Owing to rear deflector is provided with the locating slot of fixing inner tube, inner tube is played positioning action, it is not necessary to the fixed installation structure of other complexity is separately set, this design simple in construction, the good fixing effect to inner tube, be suitable to practicality.
In sum, a kind of blender promoting aqueous solution of urea to be atomized of this utility model makes full use of the reverse perturbation action of diesel exhaust gas air-flow, promote enter the aqueous solution of urea atomization of this blender and be sufficiently mixed with diesel exhaust, and can effectively prevent deposition and the crystallization of carbamide, there is the advantage such as simple in construction, good, the gas mix homogeneously of aqueous solution of urea atomizing effect.
Accompanying drawing explanation
Fig. 1 is the structure diagram that this utility model promotes the blender of aqueous solution of urea atomization；
Fig. 2 is the right view of Fig. 1；
Fig. 3 is the structure diagram enlarged drawing of front flow guiding plate in Fig. 1；
Wherein: 1-outer tube, 11-mounting seat, 2-inner tube, 21-through hole, 3-front flow guiding plate, 31-endoporus, 32-perforate, deflector after 4-, 41-locating slot, 5-entrance, 6-exports, and 7-wall point.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, this utility model is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain this utility model, is not used to limit this utility model.
For convenience of description (but not being so limited), with reference to gas traffic direction in the blender promoting aqueous solution of urea atomization, before the one end of the blender that diesel exhaust enters promotion aqueous solution of urea atomization is defined as, after relative direction is defined as and thus derive is left and right.
As Fig. 1 and Fig. 2 jointly shown in, promote that the blender front end of aqueous solution of urea atomization is entrance 5, rear end is outlet 6, including the outer tube 1 of both ends open be fixedly installed on the inner tube 2 outer tube 1 within, front flow guiding plate 3 and deflector 4 afterwards.Being tiltedly installed with mounting seat 11 on the sidewall of outer tube 1, mounting seat 11 is positioned at the front end of inner tube 2.Outer tube 1 and inner tube 2 eccentric setting, inner tube 2 is provided with the side of mounting seat 11 near outer tube 1.The front end of inner tube 2 is the toroidal smoothly transitted, and the tube wall of inner tube 2 is provided with multiple through hole 21.
When using the blender promoting aqueous solution of urea atomization, urea nozzle is arranged in mounting seat 11, it is achieved that urea nozzle mounting seat 11 and the Integrated design of blender and optimization, and simple in construction, low cost of manufacture.Aqueous solution of urea is ejected in the inner tube 2 of blender via urea nozzle, and on the tube wall of inner tube 2, the drop point of corresponding aqueous solution of urea is wall point 7.Owing to mounting seat 11 is inclined on outer tube, the front end of the urea nozzle alignment inner tube 2 after installation, and the front end of inner tube 2 is the toroidal smoothly transitted, the aqueous solution of urea that urea nozzle is sprayed is easily advanced in inner tube 2, jeting effect is more preferable, it is simple to the subsequent atomization of aqueous solution of urea and mixing.Due to outer tube 1 and inner tube 2 eccentric setting, inner tube 2 is provided with mounting seat 11 side near outer tube 1 so that the aqueous solution of urea of urea nozzle ejection inner tube 2 the wall point 7 front end closer to inner tube 2.
As Fig. 1 and Fig. 3 jointly shown in, front flow guiding plate 3 is arranged on the front end of inner tube 2, and front flow guiding plate 3 be positioned at aqueous solution of urea inner tube 2 near wall point 7.The external diameter of front flow guiding plate 3 is suitable with the internal diameter of outer tube 1, and front flow guiding plate 3 is provided with the endoporus 31 suitable with the external diameter of inner tube 2, and a lateral edges of the remotely mounted seat of endoporus 31 11 is provided with two symmetrical perforates 32, and inner tube 2 is through endoporus 31.In embodiment, preferred perforate 32 is not arc-shaped slot structure.Front flow guiding plate 3 has support and the effect of fixing inner tube 2, simple in construction, is suitable to practicality.The side that multiple through holes 21 concentrated setting in inner tube 2 is relative with mounting seat 11 in inner tube 2.
As Fig. 1 and Fig. 2 jointly shown in, rear deflector 4 is positioned at the rear end of inner tube 2, is provided with gap between edge and the tube wall of inner tube 2 of rear deflector 4, because hereafter deflector 4 stops the big portion of the internal diameter of inner tube 2.Rear deflector 4 is provided with the locating slot 41 of fixing inner tube 2, and inner tube 2 is played positioning action by locating slot 41, it is not necessary to separately arrange the fixed installation structure of other complexity, this design simple in construction, and the good fixing effect to inner tube 2 is suitable to practicality.
Diesel exhaust is entered the outer tube 1 of the blender of this promotion aqueous solution of urea atomization by entrance 5, two-way it is divided into when running into inner tube 2, the internal flowing backward of one curb inner tube 2 mixes with the aqueous solution of urea being ejected in inner tube 2, and aqueous solution of urea runs into high temperature, the waste gas of high pressure mixes by rapid atomization and with waste gas.The aqueous solution of urea not being atomized will be attached to aqueous solution of urea in inner tube 2 at wall point 7.Due to outer tube 1 and inner tube 2 eccentric setting aqueous solution of urea the wall point 7 front end closer to inner tube 2, diesel exhaust temperature at the front end of inner tube 2 is higher, speed, mutually impact after meeting with aqueous solution of urea, the atomizing effect making aqueous solution of urea is more preferable, and the gas after atomization mixes evenly with waste gas.
Another road waste gas is along the spatial flow between outer tube 1 and inner tube 2, run into the stop of front flow guiding plate 3, force waste gas can only concentrate through front flow guiding plate 3 via the perforate 32 of front flow guiding plate 3, now waste gas be forced accelerate by perforate 32 and to aqueous solution of urea wall point 7 flow about, and pass through the through hole 21 near wall point 7 and enter inner tube 2 disturbance first via waste gas, under the common disturbance and percussion of two strands of air-flows, the aqueous solution of urea be not rebuffed is promoted fully to be atomized, the aqueous solution of urea be rebuffed also is cleared up in time and is atomized, and be sufficiently mixed with waste gas, effectively prevent deposition and the crystallization of aqueous solution of urea.
The mixed gas of two-way inside and outside inner tube 2 each continues to flow to the outlet 6 of the blender promoting aqueous solution of urea atomization.Mixed gas in inner tube 2 during deflector 4, due to the stop of rear flow-stopping plate, forces major part mixed gas to be downwardly into the space between inner tube 2 and outer tube 1 along rear deflector 4 after running into.This mixed gas continues atomization mixing in this space, promotes further the atomization of aqueous solution of urea and improves the mixing uniformity of aqueous solution of urea and waste gas, is finally reached that aqueous solution of urea atomizing effect is good, the effect of gas mix homogeneously.
The reverse perturbation action of diesel exhaust gas air-flow is made full use of by a kind of blender promoting aqueous solution of urea to be atomized of above-mentioned this utility model, promote enter the aqueous solution of urea atomization of this blender and be sufficiently mixed with diesel exhaust, and can effectively prevent the deposition of carbamide, there is the advantage such as simple in construction, good, the gas mix homogeneously of aqueous solution of urea atomizing effect.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all any amendment, equivalent and improvement etc. made within spirit of the present utility model and principle, within should be included in protection domain of the present utility model.
Claims (6)
1. promote the blender of aqueous solution of urea atomization, it is characterised in that: include the outer tube of both ends open and be fixedly installed on the inner tube of described outer tube, the front flow guiding plate also including being arranged on described outer tube and rear deflector；
The sidewall of described outer tube is provided with mounting seat, and described mounting seat is positioned at the front end of said inner tube；
The tube wall of said inner tube is provided with multiple through hole；
Described front flow guiding plate is positioned at the front end of said inner tube, the external diameter of described front flow guiding plate is suitable with the internal diameter of described outer tube, described front flow guiding plate is provided with the endoporus suitable with the external diameter of said inner tube, described endoporus is provided with perforate away from a lateral edges of described mounting seat, and said inner tube passes described endoporus；
Described rear deflector is positioned at the rear end of said inner tube, is provided with gap between edge and the tube wall of said inner tube of described rear deflector.
The blender of promotion aqueous solution of urea the most according to claim 1 atomization, it is characterised in that: described outer tube and said inner tube eccentric setting, said inner tube is provided with the side of described mounting seat near described outer tube.
The blender of promotion aqueous solution of urea the most according to claim 2 atomization, it is characterised in that: the front end of said inner tube is the toroidal smoothly transitted.
The blender of promotion aqueous solution of urea the most according to any one of claim 1 to 3 atomization, it is characterised in that: multiple described through hole concentrated settings are in the said inner tube side relative with described mounting seat.
The blender of promotion aqueous solution of urea the most according to claim 4 atomization, it is characterised in that: described mounting seat is inclined on described outer tube.
The blender of promotion aqueous solution of urea the most according to claim 5 atomization, it is characterised in that: described rear deflector is provided with the locating slot of fixing said inner tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620125403.3U CN205445746U (en) | 2016-02-17 | 2016-02-17 | Mixer for promoting atomization of aqueous solution of urea |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620125403.3U CN205445746U (en) | 2016-02-17 | 2016-02-17 | Mixer for promoting atomization of aqueous solution of urea |
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| CN205445746U true CN205445746U (en) | 2016-08-10 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108979805A (en) * | 2018-09-07 | 2018-12-11 | 安徽艾可蓝环保股份有限公司 | A kind of Novel SCR system mixing disturbing flow device meeting six discharge standard of state |
| CN109653847A (en) * | 2019-01-28 | 2019-04-19 | 凯龙高科技股份有限公司 | A kind of urea liquid bimetallic tube mixer for SCR system |
| CN111779557A (en) * | 2020-07-07 | 2020-10-16 | 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 oxynitride measuring point |
| CN114320546A (en) * | 2021-12-27 | 2022-04-12 | 浙江银轮机械股份有限公司 | Mixer of engine tail gas after-treatment system |
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2016
- 2016-02-17 CN CN201620125403.3U patent/CN205445746U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108979805A (en) * | 2018-09-07 | 2018-12-11 | 安徽艾可蓝环保股份有限公司 | A kind of Novel SCR system mixing disturbing flow device meeting six discharge standard of state |
| CN108979805B (en) * | 2018-09-07 | 2023-08-29 | 安徽艾可蓝环保股份有限公司 | Novel SCR system mixed turbulent flow device meeting national six-emission standard |
| CN109653847A (en) * | 2019-01-28 | 2019-04-19 | 凯龙高科技股份有限公司 | A kind of urea liquid bimetallic tube mixer for SCR system |
| CN111779557A (en) * | 2020-07-07 | 2020-10-16 | 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 oxynitride measuring point |
| CN114320546A (en) * | 2021-12-27 | 2022-04-12 | 浙江银轮机械股份有限公司 | Mixer of engine tail gas after-treatment system |
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