CN211448803U - Aftertreatment packaging system with annular efficient mixing and flow disturbing device - Google Patents

Abstract

The utility model discloses a post-processing packaging system with a ring-shaped high-efficiency mixing turbulence device, which comprises a box body, wherein a DOC catalyst, a DPF catalyst, a urea mixer and an SCR catalyst are arranged in the box, and the box body is provided with a DOC catalyst, a DPF catalyst, a urea mixer and an SCR catalyst. The two sides are respectively provided with an intake pipe and an exhaust pipe, and the intake pipe is sequentially connected to the DOC catalyst, the DPF catalyst, the first U-shaped communication pipe, the urea mixer, the second U-shaped communication pipe, the SCR catalyst and the exhaust pipe. At least one annular mixer is arranged in the first U-shaped communicating pipe and the second U-shaped communicating pipe. The utility model arranges an annular mixer between each catalyst and the urea mixer, so that the exhaust gas and the urea are mixed more uniformly, and the mixing effect of the urea mixer and the air flow at the intake end of the SCR catalyst is improved, thereby improving the exhaust gas purification efficiency.

Description

A post-processing packaging system with a ring-shaped high-efficiency hybrid spoiler device

technical field

The utility model belongs to the technical field of engine exhaust systems, in particular to a post-processing packaging system with a ring-shaped high-efficiency mixing turbulence device.

Background technique

There are many types of internal mixers in the existing State VI box package. When the design is unreasonable, the air flow will be unevenly mixed, which will affect the conversion efficiency of the catalyst and lead to substandard emissions.

In addition, the layout design of the existing box-type package in China is unreasonable. The DOC catalyst needs efficient heat dissipation, while the urea mixer needs heat. How to rationally layout the existing box-type package to reduce the volume, improve the efficiency of exhaust gas purification and reduce energy consumption .

Utility model content

The technical problem to be solved by the utility model is to overcome the defects of the prior art, and proposes a post-processing packaging system with a ring-shaped high-efficiency mixing and disturbing device. The exhaust gas and urea are mixed more uniformly, and the mixing effect of the urea mixer and the air flow at the intake end of the SCR catalyst is improved, thereby improving the exhaust gas purification efficiency.

The technical scheme of the present utility model:

A post-processing packaging system with a ring-shaped high-efficiency mixing spoiler device, comprising a box body, the box body is provided with a DOC catalyst, a DPF catalyst, a urea mixer, and an SCR catalyst, and two sides of the box are respectively An intake pipe and an exhaust pipe are provided, and the intake pipe is sequentially connected to the DOC catalytic converter, the DPF catalytic converter, the first U-shaped communication pipe, the urea mixer, the second U-shaped communication pipe, the SCR catalytic converter and the exhaust pipe. At least one annular mixer is arranged in the first U-shaped communication pipe and the second U-shaped communication pipe, and the annular mixer is arranged coaxially with one or more of the DOC catalyst, DPF catalyst, urea mixer, and SCR catalyst. The annular mixer is composed of an annular plate, a through hole arranged on the annular plate, and a flow guide plate arranged on the outer wall of the annular plate at the through hole.

Further, an annular mixer is arranged in the first U-shaped communication pipe coaxially with the urea mixer, and an annular mixer is arranged in the second U-shaped communication pipe coaxially with the SCR catalyst.

Further, the tube body of the DOC catalyst is provided with heat dissipation holes, the heat dissipation holes are multiple rows of circular heat dissipation holes arranged in a matrix, and the heat dissipation holes face the urea mixer.

Further, the intake pipe is provided with a front NOx sensor mounting seat and an exhaust temperature sensor mounting seat.

Further, the DOC catalytic converter is provided with a differential pressure sensor mounting seat and an exhaust temperature sensor mounting seat.

Further, a urea nozzle mounting seat is provided at the center of the first U-shaped communication pipe of the urea mixer.

Further, the second U-shaped communication pipe is provided with an exhaust temperature sensor mounting seat at the center of the SCR catalyst.

Further, the air outlet pipe is provided with a rear NOx sensor mounting seat and a PM sensor mounting seat.

Compared with the prior art, the utility model is provided with an annular mixer at the inlet end of the urea mixer and the inlet end of the SCR catalyst, so that the exhaust gas and the urea are mixed more evenly, and the inlet end of the urea mixer and the SCR catalyst is improved. The mixing effect of air flow, thereby improving the efficiency of exhaust gas purification.

In addition, the utility model designs the DOC catalyst, DPF catalyst, urea mixer, and SCR catalyst in the same box, and designs a plurality of heat dissipation holes on the DOC catalyst to dissipate the high temperature heat in the DOC catalyst into the box. In the body, the urea mixer needs to absorb heat when it is working. The setting of the heat dissipation holes on the DOC catalyst can quickly and efficiently transfer the heat of the DOC catalyst to the urea mixer and the box, which fully improves the heat utilization efficiency and improves the exhaust gas. The efficiency of purification, and the heat dissipation holes distributed on the DOC tube body are convenient to provide heat to the entire box body for thermal insulation, eliminating the need for wrapping materials on the outside of the box body, which not only improves the energy utilization rate, but also reduces the overall cost.

Furthermore, the design of the two U-shaped connecting pipes connects the DOC catalyst, DPF catalyst, urea mixer, and SCR catalyst into a continuous U-shaped tube structure designed in the box, which greatly reduces the box type. The volume of the post-processing system; after optimizing the volume of the box-type post-processing system, the position design of each sensor mounting seat is further optimized, and the installation of each sensor and the wiring harness for the connection are further optimized to reduce the volume of the entire post-processing system. .

Description of drawings

Fig. 1 is the front sectional structure schematic diagram of the annular mixer of the present invention;

Fig. 2 is a three-dimensional cross-sectional structural schematic diagram of the annular mixer of the present invention;

FIG. 3 is a schematic diagram of the three-dimensional structure of the multi-ring mixer of the present invention;

4 is a schematic structural diagram of the annular mixer of the present invention;

5 is a schematic diagram of the position of each sensor of the present invention;

FIG. 6 is a schematic structural diagram of the second U-shaped communicating pipe of the present invention.

Detailed ways

The specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

Example 1:

A post-processing packaging system with a ring-shaped high-efficiency mixing spoiler device, as shown in Figures 1-4, includes a box 1, and the box 1 is provided with a DOC catalyst 2, a DPF catalyst 3, and a urea mixer 4. , SCR catalytic converter 5, the two sides of the box are respectively provided with an intake pipe 11 and an exhaust pipe 12, the intake pipe 11 is sequentially connected to the DOC catalytic converter 2, the DPF catalytic converter 3, the first U-shaped communication pipe 6, and the urea The mixer 4 , the second U-shaped communication pipe 7 , the SCR catalyst 5 and the gas outlet pipe 12 , at least one annular mixer 10 is arranged in the first U-shaped communication pipe 6 and the second U-shaped communication pipe 7 . An annular mixer 10 is arranged in the U-shaped communication pipe 6 coaxially with the urea mixer 4 , and an annular mixer 10 is arranged in the second U-shaped communication pipe 7 coaxially with the SCR catalyst 5 . The device 10 is composed of an annular plate 101 , a through hole 102 disposed on the annular plate 101 , and a flow guide plate 103 disposed on the outer wall of the annular plate 101 at the through hole 102 .

Further, the tube body of the DOC catalyst 2 is provided with heat dissipation holes 21 , the heat dissipation holes 21 are multiple rows of circular heat dissipation holes arranged in a matrix, and the heat dissipation holes face the urea mixer 4 .

As shown in FIGS. 1-3 , the tube body of the DOC catalyst 2 is provided with heat dissipation holes 21 . The heat dissipation holes 21 are multi-row circular heat dissipation holes arranged in a matrix, and the heat dissipation holes face the urea mixer 4 . . As shown in FIGS. 5 and 6 , the intake pipe 11 is provided with a front NOx sensor mounting seat 91 and an exhaust temperature sensor mounting seat 92 . The DOC catalyst 2 is provided with a differential pressure sensor mounting seat 93 and an exhaust temperature sensor mounting seat 92 . The first U-shaped communication pipe 6 is located at the center of the urea mixer 4 with a urea nozzle mounting seat 95 . The second U-shaped communication pipe 7 is located at the center of the SCR catalyst 5 with an exhaust temperature sensor mounting seat 92 . The air outlet pipe 12 is provided with a rear NOx sensor mounting seat 97 and a PM sensor mounting seat 98 .

Compared with the prior art, the utility model is provided with a multi-blade mixer inside the urea mixer, and an annular mixer is arranged at the inlet end of the urea mixer and the inlet end of the SCR catalyst, so that the mixing of the exhaust gas and the urea is more efficient. It improves the uniformity of the airflow at the intake end of the SCR catalyst, thereby improving the purification efficiency of the exhaust gas.

In addition, the utility model designs the DOC catalyst, DPF catalyst, urea mixer, and SCR catalyst in the same box, and designs a plurality of heat dissipation holes on the DOC catalyst to dissipate the high temperature heat in the DOC catalyst into the box. In the body, the urea mixer needs to absorb heat when it is working. The setting of the heat dissipation holes on the DOC catalyst can quickly and efficiently transfer the heat of the DOC catalyst to the urea mixer and the box, which fully improves the heat utilization efficiency and improves the exhaust gas. The efficiency of purification, and the heat dissipation holes distributed on the DOC tube body are convenient to provide heat to the entire box body for thermal insulation, eliminating the need for wrapping materials on the outside of the box body, which not only improves the energy utilization rate, but also reduces the overall cost.

Furthermore, the design of the two U-shaped connecting pipes connects the DOC catalyst, DPF catalyst, urea mixer, and SCR catalyst into a continuous U-shaped tube structure designed in the box, which greatly reduces the box type. The volume of the post-processing system; after optimizing the volume of the box-type post-processing system, the position design of each sensor mounting seat is further optimized, and the installation of each sensor and the wiring harness for the connection are further optimized to reduce the volume of the entire post-processing system. .

The basic principles, main features and advantages of the present invention have been shown and described above. The present utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principles of the present utility model. The present utility model will have various changes and improvements without departing from the spirit and scope of the present utility model. , these changes and improvements all fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (8)

1. a post-processing packaging system with a ring-shaped high-efficiency mixing spoiler, is characterized in that: the post-processing packaging system comprises a box, and the box is provided with a DOC catalyzer, a DPF catalyzer, a urea mixer, SCR catalytic converter, the two sides of the box are respectively provided with an intake pipe and an exhaust pipe, and the intake pipe is sequentially connected to the DOC catalytic converter, the DPF catalytic converter, the first U-shaped communication pipe, the urea mixer, and the second U-shaped communication pipe. pipe, SCR catalyst and gas outlet pipe, at least one annular mixer is arranged in the first U-shaped communication pipe and the second U-shaped communication pipe, and the annular mixer is connected with DOC catalyst, DPF catalyst, urea mixer, One or more of the SCR catalysts are arranged coaxially, and the annular mixer is composed of an annular plate, a through hole arranged on the annular plate, and a flow guide plate arranged on the outer wall of the annular plate at the through hole. 2. The post-processing packaging system with a ring-shaped high-efficiency mixing turbulence device according to claim 1, characterized in that: an annular mixer is arranged in the first U-shaped communicating pipe coaxially with the urea mixer, An annular mixer is arranged in the second U-shaped communication pipe coaxially with the SCR catalyst. 3 . The post-processing packaging system with a ring-shaped high-efficiency mixing spoiler device according to claim 1 , wherein the tube body of the DOC catalyst is provided with heat dissipation holes, and the heat dissipation holes are arranged in a matrix. 4 . There are multiple rows of circular heat dissipation holes, and the heat dissipation holes face the urea mixer. 4 . The after-treatment packaging system with an annular high-efficiency mixed spoiler device according to claim 1 , wherein the intake pipe is provided with a front NOx sensor mounting seat and an exhaust temperature sensor mounting seat. 5 . 5 . The post-processing packaging system with an annular high-efficiency mixing spoiler device according to claim 1 , wherein the DOC catalyst is provided with a differential pressure sensor mounting seat and an exhaust temperature sensor mounting seat. 6 . 6 . The post-processing packaging system with an annular high-efficiency mixing and turbulence device as claimed in claim 1 , wherein the first U-shaped communicating pipe is located at the center of the urea mixer and is provided with a urea nozzle mounting seat. 7 . 7 . The post-processing packaging system with an annular high-efficiency mixing turbulence device according to claim 1 , wherein the second U-shaped communicating pipe is located at the center of the SCR catalyst and is provided with an exhaust temperature sensor mounting seat. 8 . . 8 . The post-processing packaging system with an annular high-efficiency mixing spoiler device according to claim 1 , wherein the air outlet pipe is provided with a rear NOx sensor mounting seat and a PM sensor mounting seat. 9 .

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