1. A mixer guide plate structure comprises a guide plate (2), wherein the guide plate (2) is positioned between a DOC (DOC) inclusion component (4) and an SDPF (diesel particulate filter) inclusion component (5),

the upper portion of guide plate (2) has semicircle orifice (201) that runs through, the lower part of guide plate (2) has a plurality of apertures (202) that run through and a plurality of long waist hole (203) that run through, long waist hole (203) ring is located the periphery of aperture (202).

2. A mixer deflector structure according to claim 1, characterized in that the number of small holes (202) is six, the number of long waist holes (203) is four, and the long waist holes (203) are evenly spaced along the central axis of the deflector (2).

3. The mixer baffle structure of claim 1, wherein the DOC enclosure component (4) comprises a DOC enclosure component end face (401), and an inner included angle between a central axis of the DOC enclosure component end face (401) and a central axis of the baffle (2) is 90 °.

4. A mixer baffle structure according to claim 3, wherein the DOC enclosure assembly (4) further comprises a urea injection base (1), and an inner included angle between a central axis of the urea injection base (1) and a central axis of the baffle (2) is 4 °.

5. A mixer baffle structure according to claim 3 wherein the internal included angle between the central axis of the DOC enclosure end face (401) and the SDPF enclosure (5) is 59 °.

6. A mixer baffle structure according to claim 1, wherein the SDPF enclosure assembly (5) comprises a swirl plate (3), the central axis of the swirl plate (3) coinciding with the central axis of the SDPF enclosure assembly (5).

7. A method of operating a mixer deflector structure according to claim 1, comprising the steps of:

step one, when airflow flows into the DOC enclosure component (4), spraying urea into a urea spraying base (1) on the DOC enclosure component (4) to be primarily mixed with the inflow airflow;

secondly, guiding the primarily mixed gas flow by the guide plate (2), so that a part of primarily mixed gas flows to the cyclone plate (3) of the SDPF inclusion component (5) through the semicircular holes (201), and the other part of primarily mixed gas also flows to the cyclone plate (3) under the shunting action of the small holes (202) and the long waist holes (203);

and step three, the swirl plate (3) enables the primary mixed gas flow to rotate, and further mixing the unreacted urea in the primary mixed gas flow with the gas flow.

Background

After the exhaust after-treatment of the Diesel engine is developed to the six-Emission stage of the country or even the six-RDE (Real driving pollutant Emission) stage, the Emission requirement of NOx (nitrogen oxide) is more strict, and the original structure is gradually difficult to meet the regulatory requirement, so the main design idea of the Diesel purifier is changed from the original DOC (Diesel Oxidation Catalyst) + DPF (Diesel Particulate Filter) + mixer + SCR (Selective Catalytic Reduction), to the DOC (Diesel Oxidation Catalyst) + mixer + SDPF (SCR Catalytic Diesel Particulate Filter-Catalytic Particulate Filter) + SCR (Selective Catalytic Reduction).

At present, the structure has the advantages that the reaction temperature is increased in advance, the urea double-spraying design is easier to meet the requirements of regulations, but the new structure has the difficulty that a DOC + mixer + SDPF structure needs to be arranged in a narrow and irregular space of an engine cabin, and the requirements of part forming, processing, welding, mounting, tool positioning, part structure disassembly, durability and other aspects of examination can be met to realize batch production. This makes the design of the new mixer very difficult, and because the space has a great limit to the external shape of the mixer, it presents a great challenge to the uniformity and eccentricity of the air flow in the mixer.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides a mixer guide plate structure, which aims to solve the technical problem of how to ensure the uniformity and eccentricity of air flow in a mixer in a limited space, further improve the uniformity of ammonia mixing and realize the mass production of products.

The technical scheme is as follows: in order to achieve the purpose, the invention adopts the technical scheme that:

the invention aims to provide a mixer guide plate structure which comprises a guide plate, wherein the guide plate is positioned between a DOC (document management) enclosure assembly and an SDPF (standard data processor) enclosure assembly, the upper part of the guide plate is provided with a through semicircular hole, the lower part of the guide plate is provided with a plurality of through small holes and a plurality of through long waist holes, and the long waist holes are arranged on the peripheries of the small holes in a surrounding mode.

Optionally, the quantity of aperture is six, the quantity of long waist hole is four, long waist hole is followed the even interval of axis of guide plate sets up.

Optionally, the DOC inclusion subassembly includes DOC inclusion subassembly terminal surface, the axis of DOC inclusion subassembly terminal surface with interior contained angle between the axis of guide plate is 90.

Optionally, the DOC inclusion subassembly still includes urea injection base, urea injection base the axis with interior contained angle between the axis of guide plate is 4.

Optionally, an inner included angle between a central axis of the DOC enclosure assembly end face and a central axis of the SDPF enclosure assembly is 59 °.

Optionally, the SDPF enclosure assembly includes a swirl plate, and a central axis of the swirl plate coincides with a central axis of the SDPF enclosure assembly.

Another object of the present invention is to provide a method of operating a mixer baffle structure, comprising the steps of:

step one, when airflow flows into the DOC enclosure component, urea is sprayed from a urea spraying base on the DOC enclosure component and is primarily mixed with the inflowing airflow;

secondly, guiding the preliminarily mixed airflow by the guide plate, so that one part of the preliminarily mixed airflow flows to the cyclone plate of the SDPF inclusion component through the semicircular holes, and the other part of the preliminarily mixed airflow flows to the cyclone plate under the shunting action of the small holes and the long waist holes;

and step three, the swirl plate enables the primary mixed gas flow to rotate, and further mixing the unreacted urea in the primary mixed gas flow with the gas flow.

Has the advantages that: compared with the prior art, the mixer guide plate structure provided by the invention has the advantages that the uniformity and eccentricity of airflow in the mixer are ensured in a limited space, the ammonia mixing uniformity is improved, the carrier utilization rate is improved, the tail gas purification effect is improved, the mass production of products is realized, the structure is simple, and the practicability is high.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of a mixer guide plate structure according to an exemplary embodiment of the present invention;

FIG. 2 is a schematic view of the mixer deflector structure of FIG. 1 taken along line A-A in accordance with an exemplary embodiment of the present invention;

FIG. 3 is a schematic view of the structure of a mixer guide plate according to an exemplary embodiment of the present invention, taken along the direction B-B in FIG. 2;

FIG. 4 is a schematic view of the mixer deflector structure of FIG. 1 taken along line A-A in accordance with an exemplary embodiment of the present invention;

in the figure: 1. a urea injection base; 2. a baffle; 201. a semicircular hole; 202. a small hole; 203. a long waist hole; 3. a swirl plate; 4. a DOC enclosure component; 401. a DOC enclosure assembly end face; 5. an SDPF enclosure component.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central", "longitudinal", "lateral", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The invention is further described with reference to the following figures and examples.

As shown in fig. 1 and 2, a mixer flow guide plate structure includes a flow guide plate 2, the flow guide plate 2 is located between a DOC enclosure assembly 4 and an SDPF enclosure assembly 5, as shown in fig. 3, the upper part of the flow guide plate 2 has a through semicircular hole 201, the lower part of the flow guide plate 2 has a plurality of through small holes 202 and a plurality of through long waist holes 203, and the long waist holes 203 are annularly arranged on the periphery of the small holes 202.

In this embodiment, because the air current mainly flows by top DOC carrier, the air current is mainly concentrated in the blender lower part because of gas viscosity and inertial reason, and the air current homogeneity and the eccentricity that cause to flow through the whirl board are very poor, and this guide plate 2 can guide the air current, improves air current homogeneity and eccentricity, and then improves ammonia and mixes the homogeneity, promotes the carrier utilization ratio and promotes the tail gas clean-up effect. This structure is used for between DOC catalyst and the SDPF catalyst, belongs to the blender inner structure part, and the air current flows from the DOC carrier, flows into the blender like the arrow direction in fig. 2, and the urea on right side sprays the base 1 and spouts the air current mixture that urea and DOC came out and make the air current comparatively even blow to whirl board 3 through guide effect of guide plate 2 on, make the air current rotatory reach the effect of further mixing urea and air current.

In this embodiment, the flow guide plate 2 is fixedly connected with the DOC bag assembly 4 and the SDPF bag assembly 5 by welding; optionally, the size of the airflow guiding degree can be adjusted by controlling the size of the semicircular hole 201; the small holes 202 and long waist holes 203 allow a small portion of the air flow to pass underneath, reducing the system back pressure and dispersing the air flow.

As an alternative embodiment, as shown in fig. 3, the number of the small holes 202 is six, the number of the long waist holes 203 is four, and the long waist holes 203 are uniformly spaced along the central axis of the baffle 2.

In this embodiment, the small holes 202 and the long waist holes 203 allow a small portion of the air flow to pass through from below, reducing the back pressure of the system and dispersing the air flow.

As an alternative embodiment, as shown in fig. 4, the DOC enclosure component 4 includes a DOC enclosure component end face 401, and the inner included angle Y between the central axis of the DOC enclosure component end face 401 and the central axis of the flow guide plate 2 is 90 °. Optionally, the mounting angle can be flexibly adjusted according to specific working conditions.

As an alternative embodiment, as shown in fig. 4, the DOC enclosure assembly 4 further includes a urea injection base 1, and an inner included angle between a central axis of the urea injection base 1 and a central axis of the flow guide plate 2 is 4 °, that is, an inner included angle Z between the central axis of the urea injection base 1 and a central axis of the DOC enclosure assembly end surface 401 is 94 °. Optionally, the mounting angle can be flexibly adjusted according to specific working conditions.

As an alternative embodiment, as shown in fig. 4, the internal included angle X between the central axis of the DOC package end face 401 and the central axis of the SDPF package 5 is 59 °. Optionally, the mounting angle can be flexibly adjusted according to specific working conditions.

As an alternative embodiment, as shown in fig. 4, the SDPF enclosure 5 includes a swirl plate 3, and the central axis of the swirl plate 3 coincides with the central axis of the SDPF enclosure 5.

For a better understanding of the present invention, reference is made to the following description of the invention taken in conjunction with the accompanying drawings and a specific embodiment. It should be noted that the described embodiments are only a part of the embodiments of the present invention, and do not limit the protection scope of the present invention.

In this embodiment, in order to solve the problem how to ensure uniformity and eccentricity of the airflow in the mixer in a limited space, thereby improving uniformity of ammonia mixing and achieving mass production of products, the mixer baffle structure described in any of the above embodiments is used, and the operating method of the mixer baffle structure includes the following steps:

step one, when airflow flows into a DOC (DOC) inclusion component 4, urea is sprayed into a urea spraying base 1 on the DOC inclusion component 4 and is primarily mixed with the flowing airflow;

secondly, guiding the primarily mixed gas flow by the guide plate 2, so that most of the primarily mixed gas flows to the cyclone plate 3 of the SDPF inclusion component 5 through the semicircular holes 201, and a small part of the primarily mixed gas flows to the cyclone plate 3 under the shunting action of the small holes 202 and the long waist holes 203;

and step three, the rotational flow plate 3 enables the primary mixed airflow to rotate, and further mixing the unreacted urea in the primary mixed airflow with the airflow.

In conclusion, the mixer guide plate structure provided by the invention has the advantages that the uniformity and the eccentricity of airflow in the mixer are ensured in a limited space, the ammonia mixing uniformity is improved, the carrier utilization rate is improved, the tail gas purification effect is improved, the mass production of products is realized, the structure is simple, and the practicability is high.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.