CN215761870U - Novel blade type flow guide device for SCR air outlet end - Google Patents
Novel blade type flow guide device for SCR air outlet end Download PDFInfo
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- CN215761870U CN215761870U CN202122010122.7U CN202122010122U CN215761870U CN 215761870 U CN215761870 U CN 215761870U CN 202122010122 U CN202122010122 U CN 202122010122U CN 215761870 U CN215761870 U CN 215761870U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The utility model relates to a novel blade type flow guide device for an SCR (selective catalytic reduction) air outlet end, belonging to the technical field of aftertreatment. Comprises a flow guide device main body, a flow guide plate and a sensor probe; the flow guide device main body comprises a cylinder, an SCR catalyst and an end cone, wherein the SCR catalyst is arranged in the cylinder, and the end cone is arranged at the right end of the cylinder; the guide plate consists of a guide plate main body and guide vanes, the guide plate main body is provided with rectangular guide grooves, the rectangular guide grooves are provided with the guide vanes, and the guide plate main body is provided with guide through holes; a sensor probe is arranged on the side surface of the end cone, a guide plate is arranged on the cylinder body on the right side of the SCR catalyst, and all guide vanes point to the sensor probe; the utility model solves the problem that the concentration of NOx measured by a sensor probe on the air outlet end of the existing diversion device is not accurate enough, improves the measurement performance of the diversion device, ensures the authenticity and the accuracy of the measured value of NOx at the air outlet end of the SCR, and ensures that the emission of tail gas discharged from the air outlet end of the SCR reaches the national six standards.
Description
Technical Field
The utility model relates to the technical field of aftertreatment, in particular to a novel blade type flow guide device for an SCR (selective catalytic reduction) gas outlet end.
Background
SCR, also known as selective catalytic reduction technology, is a treatment process for NOx in tail gas emission of diesel vehicles, i.e. under the action of a catalyst, a reducing agent ammonia or urea is sprayed to reduce NOx in tail gas into N2 and H2O. 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, the sixth country and the like. At present, in the equipment for implementing the SCR post-treatment technology on a plurality of automobiles, a flow guide device is required to be installed for treating and discharging tail gas, the existing flow guide device generally comprises an exhaust pipeline, an SCR catalyst, an end cone and a tail gas measuring sensor, the tail gas is discharged from a through hole of the end cone after passing through the SCR catalyst and the tail gas measuring sensor from an exhaust pipe, and the problems that a sensor probe can only capture NOx in partial gas flow in the tail gas always in an actual test, the measured NOx value is small, the measuring accuracy is not enough and the like are found.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems of defects and deficiencies in the prior art, the utility model provides the novel blade type flow guide device for the SCR gas outlet end, which solves the problem that the concentration of NOx measured by a sensor probe on the gas outlet end of the existing flow guide device is not accurate enough, improves the measurement performance of the flow guide device, ensures the authenticity and accuracy of the measured value of the NOx at the SCR gas outlet end, and ensures that the tail gas discharged from the SCR gas outlet end reaches the national six standards.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
a novel blade type flow guide device for an SCR gas outlet end comprises a flow guide device main body, a flow guide plate and a sensor probe;
the flow guide device main body comprises a cylinder, an SCR (selective catalytic reduction) catalyst and an end cone, wherein the SCR catalyst is arranged in the right end of the cylinder, and the right end of the cylinder is provided with the end cone;
the guide plate consists of a guide plate main body and guide vanes, the guide plate main body is provided with a plurality of rectangular guide grooves which are uniformly distributed, the edges of the rectangular guide grooves are provided with matched guide vanes, and the guide plate main body is also provided with a plurality of guide through holes which are uniformly distributed;
the side of the end cone is provided with a sensor probe, a guide plate is arranged on a cylinder body on the right side of the SCR catalyst, the length of the rectangular guide groove is 40-90 mm, the width of the guide groove is 10-30 mm, all guide vanes point to the sensor probe, the inclination angle between each guide vane and the rectangular guide groove is 30-60 degrees, and the aperture of each guide through hole is 2-8 mm.
Furthermore, the guide plate is connected with the inner surface of the left end of the cylinder, the sensor probe is arranged at the right end of the side face of the end cone, and the orientation of the guide vanes points to the sensor probe.
Furthermore, the arc edge of guide plate main part is equipped with the turn-ups of matching.
Further, a gasket is arranged between the SCR catalyst and the cylinder body.
Furthermore, the rectangular diversion trenches are uniformly distributed in the middle of the diversion plate main body, and diversion through holes uniformly distributed are arranged on the diversion plate main body outside the rectangular diversion trenches.
Further, the length of the rectangular guide grooves is 40mm, the width of the rectangular guide grooves is 10mm, and the number of the rectangular guide grooves is 5.
Further, the inclination angle between the guide vane and the rectangular guide groove is 30 degrees.
Furthermore, the aperture of the flow guide through hole is 2 mm.
The utility model has the following beneficial effects: according to the utility model, the guide plate is arranged on the cylinder body, so that airflow is not concentrated in the middle area any more, the airflow distribution at the probe is improved, and the uniform airflow distribution at the probe is ensured, so that the sensor can correctly measure the actual value of NOx, the measurement performance of the flow guide device is improved, the authenticity and the accuracy of the measured value of NOx at the SCR gas outlet end are ensured, and the emission of tail gas discharged from the SCR gas outlet end reaches the national six standards.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is a schematic view of a baffle configuration;
FIG. 3 is a cross-sectional view of the present invention including a liner;
fig. 4 is a schematic structural diagram of the present invention.
Detailed Description
The following detailed description of embodiments of the utility model refers to the accompanying drawings.
As shown in fig. 1 to 4, a novel vane type flow guiding device for an SCR gas outlet end comprises a cylinder 1, an SCR catalyst 2, an end cone 3 and a sensor probe 4, wherein the SCR catalyst 2 is installed in the right end of the cylinder 1, the end cone 3 is sleeved on the right end of the cylinder 1, and the sensor probe 4 is arranged on the side surface of the end cone 3; in actual operation, tail gas moves from left to right and is treated by the SCR catalyst 2 and then is discharged from a through hole at the right end of the end cone 3, and the sensor probe 4 measures the concentration of NOx in the tail gas; the guide plate 5 is arranged on the cylinder body 1 on the right side of the SCR catalytic converter 2, the guide plate is composed of a guide plate main body 5-1, guide vanes 5-2 and a turned-over edge 5-3, the turned-over edge provides convenience for the installation of the guide plate, 5 uniformly distributed rectangular guide grooves 5-4 are arranged in the middle of the guide plate main body 5-1, the length of the rectangular guide grooves 5-4 is 40mm, the width of the rectangular guide grooves is 10mm, matched guide vanes 5-2 are arranged at the edges of the rectangular guide grooves 5-4, the inclination angle between the guide vanes 5-2 and the rectangular guide grooves 5-4 is 30 degrees, uniformly distributed guide through holes 5-5 are arranged at the edges of the guide plate main body 5-1, the guide through holes 5-5 can effectively reduce the back pressure, and the problem that the back pressure is too large due to the increase of the guide plate 5 is effectively avoided, the aperture of the flow guide through hole 5-5 is phi 2mm, the arc edge of the flow guide plate main body 5-1 is provided with a matched flanging 5-3, the sensor probe 4 is arranged at the right end of the side surface of the end cone 3, the flow guide plate 5 is connected with the left end of the inner surface of the cylinder 1, and all the flow guide blades point to the sensor probe; in actual operation, after tail gas passes through the SCR catalyst 2, the straight edge of the guide plate 5 is used as a boundary, the treated tail gas of the right half part of the cylinder 1 directly passes through the sensor probe 4 and is then discharged from the through hole at the right end of the end cone 3, the tail gas of the left half part of the cylinder 1 is guided to the sensor probe 4 by the guide vanes 5-2 when passing through the guide plate 5 and is then discharged from the through hole at the right end of the end cone 3, most of the treated tail gas is measured by the sensor probe 4 due to the guide plate 5, the accuracy of NOx concentration measurement is improved, the authenticity and accuracy of a NOx measured value at an SCR gas outlet end are ensured, and the tail gas emission at the SCR gas outlet end reaches the national six standards.
The utility model has the following beneficial effects: according to the utility model, the guide plate is arranged on the cylinder body, so that airflow is not concentrated in the middle area any more, the airflow distribution at the probe is improved, and the uniform airflow distribution at the probe is ensured, so that the sensor can correctly measure the actual value of NOx, the measurement performance of the flow guide device is improved, the authenticity and the accuracy of the measured value of NOx at the SCR gas outlet end are ensured, and the emission of tail gas discharged from the SCR gas outlet end reaches the national six standards.
Preferably, a gasket 6 is arranged between the cylinder 1 and the SCR catalyst 2.
The foregoing shows and describes the general principles, essential features, and advantages of the utility model. The present invention is not limited to the above-described embodiments, which are described in the specification and illustrated only for illustrating the principle of the present invention, but various changes and modifications may be made within the scope of the present invention as claimed without departing from the spirit and scope of the present invention. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (8)
1. A novel vane type guiding device for SCR outlet end, its characterized in that: comprises a flow guide device main body, a flow guide plate and a sensor probe;
the flow guide device main body comprises a cylinder, an SCR (selective catalytic reduction) catalyst and an end cone, wherein the SCR catalyst is arranged in the right end of the cylinder, and the right end of the cylinder is provided with the end cone;
the guide plate consists of a guide plate main body and guide vanes, the guide plate main body is provided with a plurality of rectangular guide grooves which are uniformly distributed, the edges of the rectangular guide grooves are provided with matched guide vanes, and the guide plate main body is also provided with a plurality of guide through holes which are uniformly distributed;
the side of the end cone is provided with a sensor probe, a guide plate is arranged on a cylinder body on the right side of the SCR catalyst, the length of the rectangular guide groove is 40-90 mm, the width of the guide groove is 10-30 mm, all guide vanes point to the sensor probe, the inclination angle between each guide vane and the rectangular guide groove is 30-60 degrees, and the aperture of each guide through hole is 2-8 mm.
2. The novel vane type flow guiding device for the SCR gas outlet end according to claim 1, wherein: the guide plate is connected with the inner surface of the left end of the cylinder, the sensor probe is arranged at the right end of the side face of the end cone, and the orientation of the guide vanes points to the sensor probe.
3. The novel vane type flow guiding device for the SCR gas outlet end according to claim 1, wherein: and matched flanges are arranged at the arc-shaped edges of the guide plate main body.
4. The novel vane type flow guiding device for the SCR gas outlet end according to claim 1, wherein: and a gasket is arranged between the SCR catalyst and the cylinder body.
5. The novel vane type flow guiding device for the SCR gas outlet end according to claim 1, wherein: the rectangular diversion grooves are uniformly distributed in the middle of the diversion plate main body, and diversion through holes which are uniformly distributed are arranged on the diversion plate main body outside the rectangular diversion grooves.
6. The novel vane type flow guiding device for the SCR gas outlet end according to claim 1, wherein: the length of the rectangular guide grooves is 40mm, the width of the rectangular guide grooves is 10mm, and the number of the rectangular guide grooves is 5.
7. The novel vane type flow guiding device for the SCR gas outlet end according to claim 1, wherein: the inclination angle between the guide vane and the rectangular guide groove is 30 degrees.
8. The novel vane type flow guiding device for the SCR gas outlet end according to claim 1, wherein: the aperture of the flow guide through hole is 2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122010122.7U CN215761870U (en) | 2021-08-25 | 2021-08-25 | Novel blade type flow guide device for SCR air outlet end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122010122.7U CN215761870U (en) | 2021-08-25 | 2021-08-25 | Novel blade type flow guide device for SCR air outlet end |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215761870U true CN215761870U (en) | 2022-02-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122010122.7U Active CN215761870U (en) | 2021-08-25 | 2021-08-25 | Novel blade type flow guide device for SCR air outlet end |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215761870U (en) |
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2021
- 2021-08-25 CN CN202122010122.7U patent/CN215761870U/en active Active
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