CN214145630U - Novel high-efficient vortex that mixes of six standards SCR systems of satisfying state device - Google Patents
Novel high-efficient vortex that mixes of six standards SCR systems of satisfying state device Download PDFInfo
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- CN214145630U CN214145630U CN202023108353.3U CN202023108353U CN214145630U CN 214145630 U CN214145630 U CN 214145630U CN 202023108353 U CN202023108353 U CN 202023108353U CN 214145630 U CN214145630 U CN 214145630U
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Abstract
The utility model relates to a novel satisfy six standard SCR system high efficiency mixing vortex devices in state belongs to diesel engine aftertreatment SCR system technical field. Comprises a shell, a flow guide pipe, a partition plate, a wire mesh mixer, a mixing pipe and a perforated plate; the air inlet is provided with a baffle plate, the arch baffle plate is fixedly connected to the air inlet in a sealing manner and protrudes to the middle part of the shell, one surface of the rectangular baffle plate, which is close to the liquid inlet, is provided with a matched flow guide pipe, one end of the flow guide pipe is fixedly connected to the second round through hole in a sealing manner, the other surface of the rectangular baffle plate is provided with a matched metal wire mesh mixer, and one end of the metal wire mesh mixer is fixedly connected to the second round through hole in a sealing manner; the gas outlet is equipped with the perforated plate of matching, the perforated plate is equipped with the open end of the mixing tube and the mixing tube of matching near the inside one side of casing and installs the middle part at the perforated plate. The utility model discloses the vortex is effectual, has guaranteed the homogeneity that SCR inlet end face ammonia distributes, has improved the efficiency of SCR system.
Description
Technical Field
The utility model relates to a diesel engine aftertreatment SCR system technical field especially relates to a novel satisfy the high-efficient vortex of mixing of six standard SCR systems in state device.
Background
With the continuous enhancement of environmental protection of various countries in the world, 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-stage emission standard of China cannot enter the new automobile announcement of the 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. Nowadays, 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.
The existing mixing and disturbing device has poor urea crystallization resistance, and the uniformity of ammonia distribution on the end face of the SCR catalyst after tail gas and urea pass through the existing mixing and disturbing device does not meet the requirement (the requirement that the engineering target is required to be more than or equal to 0.95) at the end face of the SCR catalyst.
SUMMERY OF THE UTILITY MODEL
Defect and not enough problem among the prior art, the utility model provides a novel satisfy six standard U type encapsulation SCR system high efficiency and mix vortex device of state, simple to operate is swift, mixes the vortex effectual to SCR system efficient catalytic effect has been guaranteed.
The utility model provides a technical scheme that its technical problem adopted is:
a novel efficient mixing and turbulence device meeting the national six standards for an SCR system comprises a shell, a flow guide pipe, a partition plate, a wire mesh mixer, a mixing pipe and a perforated plate;
the shell is provided with an air inlet, an air outlet and a liquid inlet, the air inlet and the air outlet are round and are respectively arranged at two ends of the same side face of the shell, and the liquid inlet is arranged at the top of the shell;
the side wall of the flow guide pipe is provided with first rectangular through holes which are uniformly distributed, the first rectangular through holes are provided with matched flow deflectors, the included angle between the flow deflectors and the circumferential section of the connecting part of the first rectangular through holes is 30-60 degrees, and the total area of the first rectangular through holes is not less than 1.5 times of the area of the air inlet;
the baffle plate consists of a rectangular baffle plate and an arched baffle plate, the arched baffle plate is provided with a row of uniformly distributed first circular through holes, the middle part of the rectangular baffle plate is provided with a second circular through hole, and the arched baffle plate is vertically and fixedly connected to one side of the rectangular baffle plate;
the metal wire mesh mixer is composed of a pipe body and a crushing layer, the thickness of the crushing layer is 20-30 mm, the crushing layer is formed by wrapping a corrugated metal wire mesh along one side, the diameter of a single metal wire of the corrugated metal wire mesh is 0.15-0.4 mm, folds on the corrugated metal wire mesh are obliquely arranged, the inclination angle of each fold is beta, the range of the folds is 100-160 degrees, the cross section of the corrugated metal wire mesh is in a zigzag shape, the vertex angle of each sawtooth is alpha, the range of the folds is 40-70 degrees, the height of each fold is h, and the range of the folds is 4-9 mm.
One end of the mixing pipe is arranged in a sealing mode, the other end of the mixing pipe is provided with an opening, the side wall of the mixing pipe is provided with a second rectangular through hole, and the area of the second rectangular through hole is not smaller than 1.5 times of the area of the air inlet;
the porous plate is an annular plate and is provided with third circular through holes which are uniformly distributed around the circle center;
the air inlet is provided with a baffle plate, the arch baffle plate is fixedly connected to the air inlet in a sealing manner and protrudes to the middle part of the shell, one surface of the rectangular baffle plate, which is close to the liquid inlet, is provided with a matched flow guide pipe, one end of the flow guide pipe is fixedly connected to the second round through hole in a sealing manner, the other surface of the rectangular baffle plate is provided with a matched metal wire mesh mixer, and one end of the metal wire mesh mixer is fixedly connected to the second round through hole in a sealing manner; the gas outlet is equipped with the perforated plate of matching, the perforated plate is equipped with the open end seal installation at the middle part of perforated plate of the hybrid tube and hybrid tube that the inside one side of casing is close to.
Further, the number of the first rectangular through holes is eight to twelve.
Further, the number of the first circular through holes is three to six.
Further, the diameter of the first circular through hole is six to ten millimeters.
Further, the diameter of the third circular through hole is six to ten millimeters.
Furthermore, the central angle of the cambered surface where the second rectangular through hole is located is 120-160 degrees, and the acute angle between the vertical diameter direction of the chord surface corresponding to the cambered surface where the second rectangular through hole is located and the horizontal direction is 45-85 degrees.
Furthermore, the connection mode between the flow guide pipe and the partition plate is welding.
Furthermore, the connection mode between the porous plate and the mixing pipe is welding.
Furthermore, the connection mode of the partition plate and the metal wire mesh mixer is welding.
The utility model discloses following beneficial effect has: the utility model adopts the combination of the newly designed flow guide pipe, the baffle plate, the metal wire mesh mixer, the mixing pipe and the perforated plate, which can effectively improve the crystallization condition of urea; in addition, the mixing time of urea and tail gas can be prolonged, so that the mixing is more sufficient and uniform, the uniformity of the airflow at the air inlet end of the SCR catalyst is improved, the uniformity of ammonia distribution on the air inlet end surface of the SCR catalyst is improved (the requirement that the engineering target is more than or equal to 0.95 is met), and the efficiency of the SCR catalyst is enhanced.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the assembly structure of the draft tube and the partition plate;
FIG. 3 is a schematic view of the combination structure of the perforated plate and the mixing tube;
FIG. 4 is a schematic view of the position of the liquid inlet of the present invention;
FIG. 5 is a top view of a wire mesh mixer;
FIG. 6 is a front view of the pleated wire mesh;
FIG. 7 is a schematic structural view of a corrugated wire mesh;
fig. 8 is an expanded isometric view of the pleated wire mesh.
Detailed Description
The following describes in detail embodiments of the present invention with reference to the accompanying drawings.
As shown in fig. 1 to 8, a novel efficient mixing and disturbing device for an SCR system meeting the national six standards comprises a housing 1, a flow guide pipe 2, a partition plate 3, a wire mesh mixer 4, a mixing pipe 5, and a perforated plate 6; the shell 1 is provided with an air inlet 11, an air outlet 12 and a liquid inlet 13, the air inlet 11 and the air outlet 12 are circular and are respectively arranged at two ends of the same side surface of the shell 1, and the liquid inlet 13 is arranged at the top of the shell 1; the side wall of the draft tube 2 is provided with first rectangular through holes 21 which are uniformly distributed, the first rectangular through holes 21 are provided with matched guide vanes 22, the included angle of the circumferential tangent plane of the connecting part of the guide vanes 22 and the first rectangular through holes 21 is 30-60 degrees, and the total area of the first rectangular through holes 21 is not less than 1.5 times of the area of the air inlet; the baffle plate 3 consists of a rectangular baffle plate 31 and an arched baffle plate 32, the arched baffle plate 32 is provided with a row of first round through holes 321 which are uniformly distributed, the middle part of the rectangular baffle plate 31 is provided with a second round through hole 311, and the arched baffle plate 32 is vertically and fixedly connected to one side of the rectangular baffle plate 31; the metal wire mesh mixer 4 comprises a tube body 41 and a crushing layer 42, the thickness of the crushing layer 42 is 20-30 mm, the crushing layer 42 is formed by wrapping a corrugated metal wire mesh 421 along one side, the diameter of a single metal wire of the corrugated metal wire mesh 421 is 0.15-0.4 mm, corrugations 4211 on the corrugated metal wire mesh 421 are obliquely arranged, the inclination angle is beta and ranges from 100-160 degrees, the cross section of the corrugated metal wire mesh 421 is zigzag, the vertex angle of each sawtooth is alpha and ranges from 40-70 degrees, the height of each corrugation 4211 is h and ranges from 4-9 mm; one end of the mixing pipe 5 is arranged in a sealing mode, the other end of the mixing pipe 5 is provided with an opening, the side wall of the mixing pipe 5 is provided with a second rectangular through hole 51, and the area of the second rectangular through hole 51 is not smaller than 1.5 times of the area of the air inlet; the porous plate 6 is an annular plate, and the porous plate 6 is provided with third circular through holes 61 which are uniformly distributed around the circle center; the air inlet 11 is provided with a partition plate 3, the arch-shaped baffle 32 is fixedly connected at the air inlet 11 in a sealing manner and protrudes to the middle part of the shell 1, one surface of the rectangular baffle 31 close to the liquid inlet 13 is provided with a matched guide pipe 2, one end of the guide pipe 2 is fixedly connected to the second circular through hole 311 in a sealing manner, the other surface of the rectangular baffle 31 is provided with a matched wire mesh mixer 4, and one end of the wire mesh mixer 4 is fixedly connected to the second circular through hole 311 in a sealing manner; the gas outlet 12 is provided with a matched porous plate 6, one surface of the porous plate 6 close to the inside of the shell 1 is provided with a matched mixing pipe 5, and the opening end of the mixing pipe 5 is hermetically arranged in the middle of the porous plate 6. The pipe diameter of the flow guide pipe 2 is selected according to the engine displacement, generally the pipe diameter of a machine model below 3L is more than or equal to 76mm, the pipe diameter of a machine model of 3L-7L is more than or equal to 89mm, the pipe diameter of a machine model of 7L-9L is more than or equal to 101.6mm, and the pipe diameter of a machine model of 9L-13L is more than or equal to 127 mm.
The utility model discloses following beneficial effect has: the utility model discloses when the actual operation, urea solution gets into honeycomb duct 2 through inlet 13, and tail gas gets into casing 1 and honeycomb duct 2 through air inlet 11, and water conservancy diversion piece 22 can guide the air current screw in honeycomb duct 2 and urea solution intensive mixing, and the air current after the mixture passes through wire mesh mixer 4, and after the fold shape wire mesh 421 of wire mesh mixer 4 contacted with urea solution, can increase the heat exchange of urea solution and outside, promote the evaporation efficiency of urea solution, can carry out fine breakage to urea solution simultaneously; meanwhile, a part of tail gas enters the shell 1 through the first circular through hole 321 to sweep the urea solution passing through the shell 1, so that the solution in the shell 1 can be prevented from directly contacting the wall surface to form crystals; the inside air current after mixing of casing 1 is partly through mixing tube 5 gas outlet 12 that discharges, and another part is through the circular through-hole 61 gas outlet 12 that discharges of third, and the air current of mixing at last carries out catalytic reaction with the catalyst, and during, the combination of mixing tube 5 and perforated plate 6 is used and has been increased the mix time of urea and tail gas for mix more fully, evenly, promoted the homogeneity of SCR catalyst inlet end air current, improved the catalytic efficiency of SCR catalyst.
As shown in fig. 2, the number of the first rectangular through holes 21 is eight to twelve, and the effect is best in this interval.
As shown in fig. 2, the number of the first circular through holes 321 is three to six.
As shown in fig. 2, the diameter of the first circular through hole 321 is six to ten millimeters.
As shown in fig. 3, the diameter of the third circular through hole 61 is six to ten millimeters, which is the best effect.
As shown in fig. 3, the central angle subtended by the cambered surfaces of the second rectangular through holes 51 is 120-160 °, and the acute angle between the vertical diameter direction and the horizontal direction of the corresponding chord surfaces of the cambered surfaces of the second rectangular through holes 51 is 45-85 °, which is the best effect in this interval.
As shown in fig. 2, the draft tube 2 and the partition plate 3 are connected by welding, so that the connecting effect is good.
As shown in fig. 3, the connection mode between the porous plate 6 and the mixing pipe 5 is welding, and the sealing effect is good.
As shown in fig. 2, the partition 3 and the wire mesh mixer 4 are connected by welding, and the stability is good.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. The present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only for illustrating the principle of the present invention, and the present invention will have various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements all fall into the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The utility model provides a novel satisfy six standards SCR system high efficiency and mix vortex device which characterized in that: comprises a shell, a flow guide pipe, a partition plate, a wire mesh mixer, a mixing pipe and a perforated plate;
the shell is provided with an air inlet, an air outlet and a liquid inlet, the air inlet and the air outlet are round and are respectively arranged at two ends of the same side face of the shell, and the liquid inlet is arranged at the top of the shell;
the side wall of the flow guide pipe is provided with first rectangular through holes which are uniformly distributed, the first rectangular through holes are provided with matched flow deflectors, the included angle between the flow deflectors and the circumferential section of the connecting part of the first rectangular through holes is 30-60 degrees, and the total area of the first rectangular through holes is not less than 1.5 times of the area of the air inlet;
the baffle plate consists of a rectangular baffle plate and an arched baffle plate, the arched baffle plate is provided with a row of uniformly distributed first circular through holes, the middle part of the rectangular baffle plate is provided with a second circular through hole, and the arched baffle plate is vertically and fixedly connected to one side of the rectangular baffle plate;
the metal wire mesh mixer is composed of a pipe body and a crushing layer, the thickness of the crushing layer is 20-30 mm, the crushing layer is formed by wrapping a corrugated metal wire mesh along one side, the diameter of a single metal wire of the corrugated metal wire mesh is 0.15-0.4 mm, folds on the corrugated metal wire mesh are obliquely arranged, the inclination angle is beta and ranges from 100-160 degrees, the cross section of the corrugated metal wire mesh is zigzag, the vertex angle of each sawtooth is alpha and ranges from 40-70 degrees, the height of each fold is h and ranges from 4-9 mm;
one end of the mixing pipe is arranged in a sealing mode, the other end of the mixing pipe is provided with an opening, the side wall of the mixing pipe is provided with a second rectangular through hole, and the area of the second rectangular through hole is not smaller than 1.5 times of the area of the air inlet;
the porous plate is an annular plate and is provided with third circular through holes which are uniformly distributed around the circle center;
the air inlet is provided with a baffle plate, the arch baffle plate is fixedly connected to the air inlet in a sealing manner and protrudes to the middle part of the shell, one surface of the rectangular baffle plate, which is close to the liquid inlet, is provided with a matched flow guide pipe, one end of the flow guide pipe is fixedly connected to the second round through hole in a sealing manner, the other surface of the rectangular baffle plate is provided with a matched metal wire mesh mixer, and one end of the metal wire mesh mixer is fixedly connected to the second round through hole in a sealing manner; the gas outlet is equipped with the perforated plate of matching, the perforated plate is equipped with the open end seal installation at the middle part of perforated plate of the hybrid tube and hybrid tube that the inside one side of casing is close to.
2. The novel efficient hybrid spoiler device for the SCR system according to claim 1, further comprising: the number of the first rectangular through holes is eight to twelve.
3. The novel efficient hybrid spoiler device for the SCR system according to claim 1, further comprising: the number of the first circular through holes is three to six.
4. The novel efficient hybrid spoiler device for the SCR system according to claim 1, further comprising: the diameter of the first circular through hole is six to ten millimeters.
5. The novel efficient hybrid spoiler device for the SCR system according to claim 1, further comprising: the diameter of the third circular through hole is six to ten millimeters.
6. The novel efficient hybrid spoiler device for the SCR system according to claim 1, further comprising: the central angle of the cambered surface where the second rectangular through hole is located is 120-160 degrees, and the acute angle between the vertical diameter direction of the chord surface corresponding to the cambered surface where the second rectangular through hole is located and the horizontal direction is 45-85 degrees.
7. The novel efficient hybrid spoiler device for the SCR system according to claim 1, further comprising: the honeycomb duct and the partition plate are connected in a welding mode.
8. The novel efficient hybrid spoiler device for the SCR system according to claim 1, further comprising: the connection mode between the porous plate and the mixing pipe is welding.
9. The novel efficient hybrid spoiler device for the SCR system according to claim 1, further comprising: the connection mode of the clapboard and the metal wire mesh mixer is welding.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023108353.3U CN214145630U (en) | 2020-12-22 | 2020-12-22 | Novel high-efficient vortex that mixes of six standards SCR systems of satisfying state device |
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| CN202023108353.3U CN214145630U (en) | 2020-12-22 | 2020-12-22 | Novel high-efficient vortex that mixes of six standards SCR systems of satisfying state device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112459878A (en) * | 2020-12-22 | 2021-03-09 | 安徽艾可蓝环保股份有限公司 | Novel high-efficient vortex that mixes of six standards SCR systems of satisfying state device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112459878A (en) * | 2020-12-22 | 2021-03-09 | 安徽艾可蓝环保股份有限公司 | Novel high-efficient vortex that mixes of six standards SCR systems of satisfying state device |
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