CN114699944B - Steel wool mixer and diesel engine tail gas aftertreatment device with same - Google Patents
Steel wool mixer and diesel engine tail gas aftertreatment device with same Download PDFInfo
- Publication number
- CN114699944B CN114699944B CN202210153449.6A CN202210153449A CN114699944B CN 114699944 B CN114699944 B CN 114699944B CN 202210153449 A CN202210153449 A CN 202210153449A CN 114699944 B CN114699944 B CN 114699944B
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- Prior art keywords
- steel wool
- retainer
- reinforcing plate
- mixer
- reinforcing plates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses a steel wool mixer and a diesel engine tail gas aftertreatment device with the same, wherein the steel wool mixer comprises a framework and steel wool, the framework comprises a retainer and a reinforcing plate, the reinforcing plate is arranged in the retainer, and two ends of the reinforcing plate are connected with the inner side surface of the retainer and divide the interior of the retainer into a plurality of spaces; the steel wool is filled in a plurality of spaces formed by the reinforcing plate and the retainer, and the steel wool is fixedly connected with the reinforcing plate and the retainer. According to the invention, the steel wool is filled in a plurality of spaces formed by the reinforcing plate and the retainer and is fixedly connected with the reinforcing plate and the retainer, so that the area of a fixed area can be increased, the fixation is more reliable, and the phenomena of collapse of the center of the steel wool, falling of the steel wool and the like are avoided.
Description
Technical Field
The invention belongs to the technical field of diesel engine exhaust aftertreatment, and particularly relates to a steel wool mixer and a diesel engine exhaust aftertreatment device with the same.
Background
This section provides merely background information related to the present disclosure and is not necessarily prior art.
The steel wool mixer has good breaking effect on urea liquid drops, when waste gas carries the urea liquid drops to pass through the steel wool, the urea liquid drops are decomposed into a plurality of smaller liquid drops, the evaporation area of the urea liquid drops is enlarged, and therefore the urea crystallization risk is reduced; meanwhile, the structure of the steel wool is complicated, and urea and waste gas are mixed more uniformly.
The prior art steel wool mixer is usually a whole steel wool filled in a mixing tube, and the periphery of the steel wool mixer is brazed with the mixing tube. However, the steel wool is softer and has insufficient strength, so that the steel wool can only be used in a diesel engine tail gas aftertreatment device with a smaller mixing tube diameter at present. For the medium and heavy type post-treatment device, the diameter of the mixing tube is larger, and the brazing area is relatively smaller due to the fact that the steel wool is soft, so that reliability problems are easily caused, such as the phenomena that the center of the steel wool collapses or the steel wool falls off.
Disclosure of Invention
The object of the present invention is to solve at least the problem of reliability that is easily caused when the diameter of the mixing tube is large. The aim is achieved by the following technical scheme:
a first aspect of the invention proposes a steel wool mixer comprising
The framework comprises a retainer and reinforcing plates, wherein the reinforcing plates are arranged in the retainer, and two ends of each reinforcing plate are connected with the inner side surface of the retainer and divide the interior of the retainer into a plurality of spaces; and
the steel wool is filled in the plurality of spaces formed by the reinforcing plate and the retainer, and the steel wool is fixedly connected with the reinforcing plate and the retainer.
According to the steel wool mixer, the steel wool is filled in a plurality of spaces formed by the reinforcing plate and the retainer, and the steel wool is fixedly connected with the reinforcing plate and the retainer, so that the area of a fixed area can be increased, the fixation is more reliable, and the phenomena of collapse of the center of the steel wool, falling of the steel wool and the like are avoided.
In some embodiments of the present invention, the number of the reinforcing plates is one, the number of the steel wool is two, the two steel wool are respectively filled in two spaces separated by the reinforcing plates, and the outer Zhou Jun of each steel wool is fixedly connected with the side surface of the reinforcing plate and the inner side surface of the retainer.
In some embodiments of the present invention, the number of the reinforcing plates is plural, the plurality of reinforcing plates are disposed in the holder in a crossing manner, one steel wool is filled in each of the plurality of spaces partitioned by the reinforcing plates, and an outer Zhou Jun of each steel wool is fixedly connected with a side surface of the reinforcing plate and an inner side surface of the holder.
In some embodiments of the invention, the reinforcing plate is provided with a slot, a plurality of the reinforcing plates are arranged in a crossing manner through the cooperation of the slot, and a crossing line of crossing positions of the plurality of reinforcing plates is positioned at the center position of the retainer.
In some embodiments of the present invention, the reinforcing plate is in a sheet shape, and a plurality of through holes are provided on a surface of the reinforcing plate.
In some embodiments of the invention, the steel wool is fixedly connected to the reinforcing plate and the retainer by welding.
In some embodiments of the invention, the skeleton is an integrally formed structure.
In some embodiments of the invention, the ratio of the height of the steel wool to the height of the cage ranges from 0.9 to 1.0.
A second aspect of the invention proposes a diesel exhaust aftertreatment device comprising a mixing tube and a steel wool mixer as described above, the steel wool mixer being fixed inside the mixing tube.
In some embodiments of the invention, the shape and size of the holder of the steel wool mixer is adapted to the shape and size of the mixing tube.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
fig. 1 schematically shows an overall structure schematic of a steel wool mixer according to an embodiment of the present invention;
FIG. 2 schematically illustrates a schematic top view of a skeletal frame in accordance with an embodiment of the present invention;
fig. 3 schematically shows a structural schematic of a reinforcing plate according to an embodiment of the present invention;
fig. 4 schematically shows a schematic structural view of a steel wool mixer according to an embodiment of the present invention applied in a diesel exhaust aftertreatment device;
the reference numerals are as follows:
10-steel wool mixer;
11-skeleton;
111-a cage;
112-reinforcing plates;
113-a through hole;
114-grooving;
12-steel wool;
20-mixing tube;
21-fins;
30-a cylinder;
40-cover.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For ease of description, spatially relative terms, such as "inner," "outer," "lower," "below," "upper," "above," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.
As shown in fig. 1 to 4, according to an embodiment of the present invention, a steel wool mixer 10 is proposed, the steel wool mixer 10 including a skeleton 11 and steel wool 12;
the frame 11 includes a holder 111 and a reinforcing plate 112; the reinforcing plate is provided inside the holder 111, and both ends of the reinforcing plate 112 are connected to the inner side surface of the holder 111 and divide the inside of the holder into a plurality of spaces;
the steel wool 12 is filled in a plurality of spaces formed by the reinforcing plate 112 and the holder 111, and is fixedly connected with both the reinforcing plate 112 and the holder 111.
According to the steel wool mixer 10 disclosed by the invention, the steel wool 12 is filled in a plurality of spaces formed by the reinforcing plate 112 and the retainer 111, and the steel wool 12 is fixedly connected with the reinforcing plate 112 and the retainer 111.
The number of the reinforcing plates 112 is one, the shape is sheet-like, the number of the steel wool 12 is two, the two steel wool 12 are respectively filled in two spaces separated by the reinforcing plates 112, and the outer periphery of each steel wool 12 is fixedly connected with the side surface of the reinforcing plate 112 and the inner side surface of the retainer 111.
The steel wool 12 in the prior art is an integral body, and when the mixing pipe is a circular pipe, the steel wool 12 is in a circular sheet shape. When the number of the reinforcing plates 112 is one, the steel wool 12 is two semicircular pieces, which are respectively disposed in two spaces formed by the reinforcing plates 112 and the holder 111. The invention arranges the steel wool 12 into two semicircular sheets to increase the area of the fixed area, thereby increasing the strength of the fixation. In addition, as the volume of each steel wool 12 is reduced, the weight is reduced, the rigidity of the steel wool mixer is increased, the reliability is enhanced, and the advantages of strong crystallization resistance and good uniformity of the steel wool mixer can be better exerted.
The number of the reinforcing plates 112 is plural, the plurality of reinforcing plates 112 are disposed in the holder 111 in a crossing manner, and the outer circumference of each steel wool 12 is fixedly connected with the side surface of the reinforcing plate 112 and the inner side surface of the holder 111.
In fig. 2, the number of reinforcing plates 112 is two, in this embodiment, the number of steel wool 12 is four segments, each segment having an angle of 90 degrees, disposed in four spaces formed by the reinforcing plates 112 and the holders 111, respectively. According to the requirement, three reinforcing plates 112 can be provided, at this time, the number of the steel wool 12 is six sector pieces, so that the contact area between the steel wool 12 and the reinforcing plates 112 and the contact area between the steel wool 12 and the retainer 111 are more, and a better fixing effect is achieved. In addition, as the volume of each steel wool 12 is reduced, the weight is reduced, the rigidity of the steel wool mixer is increased, the reliability is enhanced, and the advantages of strong crystallization resistance and good uniformity of the steel wool mixer can be better exerted. Other embodiments are not described here. The shape and size of each steel wool 12 are the same for ease of processing. In practical application, if the reinforcing plates 112 are arranged in other manners, for example, a number of reinforcing plates 112 divide the retainer 111 into two spaces with different sizes, at this time, the shapes and sizes of the two steel wool 12 will be inconsistent, and the corresponding steel wool 12 needs to be specially manufactured according to the shape and size of each space. Similarly, for the reinforcing plates 112 with a plurality of spaces, the steel wool 12 used in each space is also manufactured by a special manufacturing method, which can significantly increase the fixing connection area of the steel wool, so that the fixing effect of the steel wool is more stable.
The reinforcing plate 112 is provided with a slit 114, and a plurality of reinforcing plates 112 are disposed to intersect by the engagement of the slit 114, and the intersection line of the intersection positions of the plurality of reinforcing plates 112 is located at the center position of the holder 111. When the number of the reinforcing plates 112 is two, the two reinforcing plates 112 are connected by adopting an assembled cross arrangement, the cross is realized through the cutting grooves 114, the cutting grooves 114 are arranged along the central position of the length direction of the reinforcing plates 112, the height of the cutting grooves 114 is half of the height of the reinforcing plates 112, and one reinforcing plate 112 passes through the cutting grooves 114 of the other reinforcing plate 112 to realize the cross arrangement. When the number of the reinforcing plates 112 is plural, two slits 114 may be provided at the upper and lower portions of the central position in the longitudinal direction of one reinforcing plate 112, respectively, and the other two reinforcing plates 112 may be processed, respectively, so that the two reinforcing plates 112 pass through the two slits 114, respectively, to achieve the cross arrangement. Such cross-stitching may allow for greater installation efficiency.
The intersecting line when the plurality of reinforcing plates 112 are arranged to intersect is located at the center position of the holder 111. When the cross section of the retainer 111 is circular, the intersecting line passes through the center position of the cross section of the retainer 111, so that the processing is simple and the installation is convenient.
The reinforcing plate 112 has a plurality of through holes 113 formed on its surface. The through holes 113 are circular, oval or rectangular, however, the through holes 113 may also be in other shapes, such as racetrack or other elongated shapes, which are not limited herein, and by providing through holes 113 with various shapes, the waste gas can flow between two adjacent steel wool 12, so that the reliability is enhanced while the crystallization resistance and the mixing uniformity are ensured.
The steel wool 12 is fixedly connected with the reinforcing plate 112 and the retainer 111 by welding. The welding mode can adopt a brazing mode, a spot welding mode or a fusion welding mode, different welding methods and welding processes can be selected according to materials, and the fixing effect can be firmer.
The skeleton 11 is an integrally formed structure. At this time, the slits 114 are removable, and are formed in a staggered manner with respect to the front plurality of reinforcing plates 112, which is easier to manufacture and more stable. The skeleton 11 may be made of metal, and is produced by casting process, and has the advantages of simple production method and low manufacturing cost.
The ratio of the height of the steel wool 12 to the height of the holder 111 ranges from 0.9 to 1.0, such as optionally 0.95 or 0.98. In order to increase the contact area between the steel wool 12 and the retainer 111, the height of the steel wool 12 can be as close to the height of the retainer 111 as possible, and when the steel wool 12 and the retainer 111 are fixed, the steel wool 12 is fixed more firmly, so that the situation that the steel wool 12 falls off is avoided.
The invention also provides a diesel engine exhaust aftertreatment device, which comprises a mixing pipe 20 and the steel wool mixer 10, wherein the steel wool mixer 10 is fixed inside the mixing pipe 20. The fixing mode can be performed by adopting a welding mode. In fig. 4, in order to make it easier to observe the structure of the steel wool mixer 10, the steel wool 12 is not placed in two of the four spaces between the holder 111 and the reinforcing plate 112, at this time, the reinforcing plate 112 and the through holes in the reinforcing plate 112 can be seen, and in the course of actual use, the steel wool 12 is filled in the spaces divided between the holder 111 and the reinforcing plate 112. In fig. 4, steel wool 12 is placed in two opposing spaces, and steel wool 12 is not placed in the other two opposing spaces.
The shape and size of the holder 111 are adapted to the shape and size of the mixing tube 20. The shape of the holder 111 may be selected according to the shape of the inner surface of the mixing tube 20, and when a circular tube is used as the mixing tube, the holder 111 may be a circular tube, and when a square tube is used as the mixing tube, the holder 111 may be adjusted to be square accordingly. The outer surface of the holder 111 and the inner surface of the mixing tube 20 are fixed by welding, and may be fixed by brazing, spot welding, or the like.
The diesel engine exhaust aftertreatment device further comprises a cylinder 30 and a cover body 40, wherein the cover body 40 is arranged at one end of the mixing tube 20, the cylinder 30 is connected with the other end of the mixing tube 20, and fins 21 are arranged on the outer surface of the mixing tube 20.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (9)
1. A steel wool mixer, characterized in that the steel wool mixer comprises:
the framework comprises a retainer and reinforcing plates, wherein the reinforcing plates are arranged in the retainer, and two ends of each reinforcing plate are connected with the inner side surface of the retainer and divide the interior of the retainer into a plurality of spaces; and
the steel wool is filled in the plurality of spaces formed by the reinforcing plate and the retainer, and the steel wool is fixedly connected with the reinforcing plate and the retainer;
the number of the steel wool is larger than one, all the steel wool is respectively arranged in each of the plurality of spaces, and the reinforcing plate is parallel to the height direction of the retainer;
the surface of the reinforcing plate is provided with a plurality of through holes;
the ratio of the height of the steel wool to the height of the retainer ranges from 0.9 to 1.0.
2. A steel wool mixer according to claim 1, characterized in that the number of reinforcing plates is one, the number of steel wool is two, two steel wool are filled in two spaces separated by the reinforcing plates, respectively, and the outer Zhou Jun of each steel wool is fixedly connected with the side of the reinforcing plate and the inner side of the holder.
3. A steel wool mixer according to claim 1, wherein the number of reinforcing plates is plural, a plurality of reinforcing plates are disposed in the holder in a crossing manner, one steel wool is filled in each of a plurality of spaces partitioned by the reinforcing plates, and an outer Zhou Jun of each steel wool is fixedly connected to a side surface of the reinforcing plate and an inner side surface of the holder.
4. A steel wool mixer according to claim 3, wherein the reinforcing plates are provided with slits, a plurality of the reinforcing plates being disposed crosswise by the cooperation of the slits, the crossing line of the crossing positions of the plurality of reinforcing plates being located at the center position of the holder.
5. A steel wool mixer according to claim 1, characterized in that the reinforcing plate is sheet-like.
6. A steel wool mixer according to claim 1, characterized in that the steel wool is fixedly connected to the reinforcing plate and the holder by welding.
7. A steel wool mixer according to claim 1, characterized in that the skeleton is of an integrally formed construction.
8. A diesel exhaust aftertreatment device comprising a mixing tube and a steel wool mixer according to any one of claims 1 to 7, the steel wool mixer being secured inside the mixing tube.
9. The diesel exhaust aftertreatment device of claim 8, wherein the shape and size of the cage of the steel wool mixer is adapted to the shape and size of the mixing tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210153449.6A CN114699944B (en) | 2022-02-18 | 2022-02-18 | Steel wool mixer and diesel engine tail gas aftertreatment device with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210153449.6A CN114699944B (en) | 2022-02-18 | 2022-02-18 | Steel wool mixer and diesel engine tail gas aftertreatment device with same |
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| CN114699944A CN114699944A (en) | 2022-07-05 |
| CN114699944B true CN114699944B (en) | 2023-05-23 |
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| CN114699944A (en) | 2022-07-05 |
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