CN214145631U - SCR system efficient mixing and flow disturbing device meeting national six-emission standard - Google Patents
SCR system efficient mixing and flow disturbing device meeting national six-emission standard Download PDFInfo
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- CN214145631U CN214145631U CN202023111919.8U CN202023111919U CN214145631U CN 214145631 U CN214145631 U CN 214145631U CN 202023111919 U CN202023111919 U CN 202023111919U CN 214145631 U CN214145631 U CN 214145631U
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Abstract
The utility model discloses a satisfy six emission standard's in state SCR system high efficiency and mix vortex device relates to the diesel engine and discharges the aftertreatment field, including the inner tube, the left end periphery of inner tube sets up annular slab, right-hand member and sets up the shrouding, and inner tube central point puts the hybrid tube that department set up the upper and lower run through the inner tube, set up the through-hole that annular array arranged on the pipe wall at hybrid tube middle part, one side rigid coupling swash plate of through-hole, the radial outside setting of hybrid tube is followed to the swash plate, the at least one deck woven wire of inner wall welded of lower part setting and hybrid tube in the hybrid tube, inner tube outer wall bottom is in hybrid tubeThe right side of the pipe is provided with a crushing plate for crushing urea. The utility model discloses can solve current SCR system and mix vortex device urea and tail gas and mix the effect poor unable NO that satisfies among the engineering target that the ammonia homogeneity is not less than 0.95 and lead to the tail gasXThe conversion efficiency is low.
Description
Technical Field
The utility model relates to a diesel engine discharges the aftertreatment field, especially relates to a satisfy six emission standard's of state SCR system high efficiency and mix vortex device.
Background
With the declaration of the ministry of environmental protection of China, from 7 months and 1 day 2012, the fourth-stage emission standard of light automobiles is implemented in China, and light automobiles which do not reach the fourth emission standard of China cannot enter the new automobile bulletin of Ministry of industry and communications. The latest national standard is that the national emission standard of the vehicles in the fifth stage is implemented nationwide from 2018, 1 month and 1 day, and the national emission standard of the vehicles in the fifth stage is implemented in advance from 2016, 1 month and 1 day in Beijing. The SCR after-treatment technology of the diesel engine is adopted to meet the emission regulations of the countries of the fourth country, the fifth country and the like. At present, China already determines that the national six standards are implemented from 7/1/2019, and the SCR post-treatment system at the present stage is not only complex in structure and expensive, but also difficult to meet the national six emission requirements.
When the mixing and disturbing flow device of the SCR post-treatment system at the present stage mixes urea and tail gas, the mixing and disturbing flow effect of the urea and the tail gas sprayed by the urea nozzle 61 on the outer cylinder 6 of the mixer is not good, the distribution of ammonia from the mixer to the end face of the SCR catalyst is required to meet the requirement of the engineering target that the uniformity of the ammonia is not less than 0.95,the prior SCR mixed turbulence device can not meet the requirement of the target, and the mixing effect of urea and tail gas is poor, so that NO in the tail gas is causedXThe conversion efficiency is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a satisfy six emission standard's of state SCR system high efficiency and mix vortex device is provided, solve current SCR system and mix vortex device urea and tail gas and mix the poor engineering target that can't satisfy the ammonia homogeneity and be not less than 0.95 and lead to the NO in the tail gasXThe conversion efficiency is low.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a satisfy six emission standard's in state SCR system high efficiency and mix vortex device, includes the inner tube, the left end periphery of inner tube sets up annular slab, right-hand member and sets up the shrouding, and inner tube central point puts the hybrid tube that the department set up the upper and lower run through the inner tube, set up the through-hole that annular array arranged on the pipe wall at hybrid tube middle part, one side rigid coupling swash plate of through-hole, the radial outside setting of hybrid tube is followed to the swash plate, the lower part sets up the at least one deck woven wire with the inner wall welded of hybrid tube in the hybrid tube, inner tube outer wall bottom sets up the broken board that is used for broken urea on the hybrid tube right side.
Further, the sealing plate is spherical and convex to the right.
Further, the number of the through holes is 12-14.
Furthermore, the starting side of the inclined plate along the clockwise direction is fixedly connected with the through hole, and the inclined plate is rectangular or trapezoidal.
Furthermore, the inclined plate and the corresponding through hole form an included angle of 20o～50o。
Further, the inner barrel diameter is between 1.5 and 2 times the mixing tube diameter.
Further, the distance between the center of the annular plate and the right vertex of the sealing plate is 1.5-2 times of the diameter of the mixing pipe.
Further, each layer of wire mesh comprises a plurality of wires vertically welded to each other in a horizontal plane, and the wires comprise wires arranged at both endsWith mixing tube inner wall welded horizontal segment and set up a plurality of slope sections of interconnect between two horizontal segments, the slope section includes interconnect's first slope section and second slope section, the contained angle of horizontal segment and second slope section is 100o～160oThe included angle between the first inclined section and the second inclined section is 40o～70oThe diameter of each metal wire is 0.15-0.4 mm, the distance between the highest point and the lowest point of each metal wire in the vertical direction is 4-9 mm, and the total thickness of the metal wire mesh is 20-30 mm.
Further, the crushing plate is sector-shaped.
The utility model discloses following beneficial effect has:
the utility model discloses a high-efficient vortex device that mixes of SCR system can make the inside urea mixture that mixes of tail gas screw in hybrid tube to the tail gas water conservancy diversion, urea pyrolysis and hydrolysis reaction are more abundant, the mixture of tail gas and urea after the mixture passes through the breakage of wire mesh and breaker, the promotion tail gas of bigger degree and the mixture of ammonia, the air current mixes more evenly, the phenomenon of urea crystallization has been improved, make follow-up more abundant, even with the catalyst reaction time, NO simultaneouslyXThe conversion efficiency is higher.
Drawings
Fig. 1 is a perspective view of the present invention;
fig. 2 is a perspective view of another angle of the present invention;
fig. 3 is a front view of the present invention;
FIG. 4 is a sectional view taken along line A-A of FIG. 3;
FIG. 5 is a perspective view of the mixer of the present invention installed in the outer cylinder;
FIG. 6 is a perspective view of the mixer of the present invention mounted at another angle within the outer barrel of the mixer;
FIG. 7 is a perspective view of the mixer of the present invention mounted at another angle within the outer barrel of the mixer;
FIG. 8 is a top view of a single layer wire mesh;
fig. 9 is a schematic view of a wire structure.
Detailed Description
Example 1:
as shown in fig. 1-9, a high-efficient mixed vortex device of SCR system that satisfies six emission standards in state, includes inner tube 1, the left end periphery of inner tube 1 sets up annular plate 2, the right-hand member sets up shrouding 3, and inner tube 1 central point department sets up the hybrid tube 4 that runs through inner tube 1 from top to bottom, set up the through-hole 41 that the annular array was arranged on the pipe wall at hybrid tube 4 middle part, one side rigid coupling swash plate 42 of through-hole 41, swash plate 42 sets up along the radial outside of hybrid tube 4, the lower part sets up the at least one deck woven wire 43 with the inner wall welded of hybrid tube 4 in the hybrid tube 4, inner tube 1 outer wall bottom sets up the crushing plate 5 that is used for broken urea on the right side of hybrid tube 4.
The diameter of the mixing pipe 4 is selected according to the engine displacement, generally the pipe diameter of a machine type below 3L is not less than 76mm, the pipe diameter of a machine type below 3L-7L is not less than 89mm, the pipe diameter of a machine type below 7L-9L is not less than 101.6mm, and the pipe diameter of a machine type below 9L-13L is not less than 127 mm.
The utility model discloses a high-efficient vortex device that mixes of SCR system can make the inside urea mixture that mixes of tail gas screw in hybrid tube to the tail gas water conservancy diversion, urea pyrolysis and hydrolysis reaction are more abundant, the mixture of tail gas and urea after the mixture passes through the breakage of wire mesh and breaker, the promotion tail gas of bigger degree and the mixture of ammonia, the air current mixes more evenly, the phenomenon of urea crystallization has been improved, make follow-up more abundant, even with the catalyst reaction time, NO simultaneouslyXThe conversion efficiency is higher.
The closing plate 3 is spherical and convex to the right.
The number of the through holes 41 is 12-14.
12-14 through holes 41 can ensure that the tail gas is screwed into the mixing pipe more uniformly.
The starting side of the sloping plate 42 along the clockwise direction is fixedly connected with the through hole 41, and the shape of the sloping plate 42 is rectangular or trapezoidal.
The inclined plate 42 and the corresponding through hole 41 form an included angle of 20o～50o。
The diameter of the inner cylinder 1 is 1.5 to 2 times of the diameter of the mixing pipe 4.
The distance between the center of the annular plate 2 and the right vertex of the closing plate 3 is 1.5 to 2 times of the diameter of the mixing tube 4.
Each layer of wire mesh 43 comprises a plurality of wires 431 welded perpendicularly to each other in a horizontal plane, the wires 431 comprise horizontal sections 4311 welded to the inner wall of the mixing tube 4 at both ends and a plurality of inclined sections 4312 connected to each other and arranged between the two horizontal sections 4311, each inclined section 4312 comprises a first inclined section 43121 and a second inclined section 43122 connected to each other, and the horizontal section 4311 and the second inclined section 43122 form an included angle of 100%o～160oThe included angle between the first inclined section 43121 and the second inclined section 43122 is 40o～70oThe diameter of each metal wire 431 is 0.15-0.4 mm, the distance between the highest point and the lowest point of each metal wire 431 in the vertical direction is 4-9 mm, and the total thickness of the metal wire mesh 43 is 20-30 mm.
The crushing plate 5 is sector-shaped.
The sector-shaped crushing plate 5 is convenient to weld with the inner wall of the mixer outer cylinder 6.
The working principle is as follows:
use the utility model discloses a when the mixed vortex device of SCR system, earlier with the top of the outer fringe of annular plate 2, the outer fringe of breaker 5 and hybrid tube 4 and the inner wall welding of assorted blender urceolus 6 together and set up before the SCR catalyst, make urea nozzle 61 set up in the top of hybrid tube 4 and just to the inner chamber of hybrid tube 4 to make the bottom of hybrid tube 4 and the 6 clearance settings of blender urceolus.
Urea is from urea nozzle 61 blowout, collide the first breakage with the inner wall of mixing tube 4 and swash plate 42, tail gas gets into and through the inner chamber of a plurality of through-hole 41 screw in mixing tube 4 from the left end of inner tube 1, the tail gas that gets into the 1 right-hand member of inner tube is blockked the inner chamber through-hole 41 screw in mixing tube 4 by shrouding 3, tail gas and urea follow along mixing tube 4 downstream process wire mesh 43 after fully mixing in the inner chamber of mixing tube 4, wire mesh 43 carries out the secondary crushing to urea, make the urea liquid drop more tiny, be favorable to subsequent urea decomposition reaction more. Urea and tail gas pass through behind the wire mesh 43 from top to bottom and collide with crushing plate 5 and take place the cubic breakage, have further promoted the homogeneity of the air current of the mixed vortex device end of giving vent to anger, guarantee that the air current distributes more evenly when getting into the catalyst terminal surface, further improve NOX conversion efficiency.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any person skilled in the art can make some changes or modifications to equivalent embodiments with equivalent changes without departing from the technical scope of the present invention, but all those persons do not depart from the technical spirit of the present invention, and any simple modifications, equivalent replacements, and improvements made to the above embodiments are within the spirit and principle of the present invention, and still belong to the protection scope of the technical solution of the present invention.
Claims (9)
1. The utility model provides a satisfy six emission standard's in state SCR system high efficiency and mix vortex device, its characterized in that, includes inner tube (1), the left end periphery of inner tube (1) sets up annular plate (2), right-hand member sets up shrouding (3), and inner tube (1) central point puts hybrid tube (4) that the department set up runs through inner tube (1) from top to bottom, set up through-hole (41) that the annular array was arranged on the pipe wall at hybrid tube (4) middle part, one side rigid coupling swash plate (42) of through-hole (41), radially outwards setting along hybrid tube (4) swash plate (42), the lower part sets up at least one deck woven wire (43) with the inner wall welded of hybrid tube (4) in hybrid tube (4), inner tube (1) outer wall bottom sets up crushing board (5) that are used for broken urea on hybrid tube (4) right side.
2. An efficient hybrid spoiler for SCR system according to six national emission standards according to claim 1, wherein the sealing plate (3) is spherical cap shaped and protruded to the right.
3. The efficient hybrid spoiler for SCR system satisfying the national emission standards according to claim 1, wherein the number of the through holes (41) is 12-14.
4. The efficient hybrid spoiler for the SCR system satisfying the national emission standards and the national emission standards as claimed in claim 1, wherein the start side of the swash plate (42) in the clockwise direction is fixedly connected to the through hole (41) and the shape of the swash plate (42) is rectangular or trapezoidal.
5. The efficient mixing and disturbing device for the SCR system according to the sixth discharge standard of claim 4, wherein the inclined plate (42) and the corresponding through hole (41) form an included angle of 20o～50o。
6. The efficient mixing and disturbing device for the SCR system meeting the national emission standards of claim 1, wherein the diameter of the inner cylinder (1) is between 1.5 and 2 times the diameter of the mixing tube (4).
7. An efficient mixing and flow disturbing device for SCR systems meeting the national emission standards of the sixth of the country according to claim 2, characterized in that the distance between the center of the annular plate (2) and the right vertex of the sealing plate (3) is between 1.5 and 2 times the diameter of the mixing pipe (4).
8. An efficient mixing and turbulence device for SCR systems meeting the national emission standards of the sixth kind according to claim 1, characterized in that each layer of wire mesh (43) comprises a plurality of wires (431) welded perpendicularly to each other in a horizontal plane, said wires (431) comprising a horizontal section (4311) welded at both ends to the inner wall of the mixing tube (4) and a plurality of interconnected inclined sections (4312) arranged between the two horizontal sections (4311), said inclined sections (4312) comprising a first inclined section (43121) and a second inclined section (43122) connected to each other, said horizontal section (4311) and said second inclined section (43122) having an angle of 100 degreeso～160oThe included angle between the first inclined section (43121) and the second inclined section (43122) is 40o～70oEach wire (431) has a diameter of 0.15 to 0.4mm and each wire (431) has the highest diameterThe distance between the point and the lowest point in the vertical direction is 4-9 mm, and the total thickness of the metal wire mesh (43) is 20-30 mm.
9. An efficient hybrid spoiler for SCR system according to the national emission standard of six as claimed in claim 1, characterized in that said breaker plate (5) is fan-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023111919.8U CN214145631U (en) | 2020-12-22 | 2020-12-22 | SCR system efficient mixing and flow disturbing device meeting national six-emission standard |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023111919.8U CN214145631U (en) | 2020-12-22 | 2020-12-22 | SCR system efficient mixing and flow disturbing device meeting national six-emission standard |
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| Publication Number | Publication Date |
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| CN214145631U true CN214145631U (en) | 2021-09-07 |
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| CN202023111919.8U Active CN214145631U (en) | 2020-12-22 | 2020-12-22 | SCR system efficient mixing and flow disturbing device meeting national six-emission standard |
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