CN213654964U - Box type tail gas aftertreatment packaging - Google Patents

Abstract

A box type tail gas aftertreatment package comprises a first aftertreatment carrier assembly, a second aftertreatment carrier assembly, a first mixing cavity shell, a mixing pipe, a second mixing cavity shell and a third aftertreatment carrier assembly. First mixing chamber casing is equipped with first mixing chamber and urea nozzle mount pad, urea nozzle mount pad is used for installing the urea nozzle, the urea nozzle be used for to spray atomizing urea liquid drop in the hybrid tube. The mixing pipe is provided with an airflow baffle extending into the first mixing cavity and close to the outlet of the second aftertreatment carrier assembly, and airflow inlets located on the periphery of the airflow baffle in the circumferential direction of the mixing pipe, and the airflow inlets are communicated with the cavity of the mixing pipe. So set up, be favorable to improving the mixing homogeneity of urea liquid drop and tail gas and be favorable to reducing the backpressure.

Description

Box type tail gas aftertreatment packaging

Technical Field

The utility model relates to a box formula's tail gas aftertreatment encapsulation belongs to engine exhaust aftertreatment technical field.

Background

With the increasing upgrading of emission regulations, the existing box-type exhaust aftertreatment package generally includes a diesel oxidation catalyst, a diesel particulate trap, a selective catalytic reduction agent, and a mixing pipe assembly installed between the diesel particulate trap and the selective catalytic reduction agent. The box-style exhaust aftertreatment package also includes a urea nozzle for spraying urea droplets into the mixing tube assembly. However, urea sprayed from the urea nozzle is easily impacted by the tail gas flow, so that excessive deflection occurs, and the mixing uniformity of urea liquid drops and tail gas is affected; in addition, how to reduce the back pressure of the box-type exhaust aftertreatment package is also a technical problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a box formula's tail gas aftertreatment encapsulation that urea liquid drop and tail gas mixing uniformity are better and the backpressure is lower.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a box-type tail gas aftertreatment package comprises a first aftertreatment carrier assembly, a second aftertreatment carrier assembly and a third aftertreatment carrier assembly, wherein the first aftertreatment carrier assembly is communicated with and located at the downstream of the first aftertreatment carrier assembly, the second aftertreatment carrier assembly is communicated with and located at the downstream of the second aftertreatment carrier assembly, a first mixing cavity shell, a mixing pipe, a second mixing cavity shell and a third aftertreatment carrier assembly are communicated with each other, the mixing pipe is communicated with the first mixing cavity shell, the second mixing cavity shell is communicated with the mixing pipe, the third aftertreatment carrier assembly is communicated with the second mixing cavity shell, the first mixing cavity shell is provided with a first mixing cavity and a urea nozzle mounting seat, the urea nozzle mounting seat is used for mounting a urea nozzle, the urea nozzle is used for spraying atomized urea liquid drops into the mixing pipe, the mixing pipe is provided with an airflow baffle extending into the first mixing cavity and close to the outlet of the second aftertreatment carrier assembly, and the airflow baffle is arranged on the mixing pipe and extends to the mixing pipe The circumferential direction of the air inlet is positioned at the periphery of the air baffle, and the air inlet is communicated with the cavity of the mixing pipe.

As a further improved technical scheme of the utility model, second aftertreatment carrier subassembly is equipped with first center, the hybrid tube is equipped with the second center, airflow baffle is following first center with be close to on the connecting line at second center second aftertreatment carrier subassembly.

As a further improved technical scheme of the utility model, the hybrid tube is equipped with and extends into ring portion in the first hybrid chamber, airflow baffle certainly ring portion is close to the edge extension of a part of second aftertreatment carrier subassembly forms.

As a further improved aspect of the present invention, the first aftertreatment support assembly includes a diesel oxidation catalyst.

As a further improved technical solution of the present invention, the second post-treatment carrier assembly includes a diesel particulate trap, and the second post-treatment carrier assembly is detachably connected to the first post-treatment carrier assembly.

As the utility model discloses further modified technical scheme, second mixing chamber casing be equipped with the second mixing chamber, with the first connecting port that the second mixing chamber is linked together and with the second connector that the second mixing chamber is linked together, wherein first connecting port with third aftertreatment carrier component links to each other, box formula's tail gas aftertreatment encapsulation still include with the fourth aftertreatment carrier component that the second connector links to each other.

As a further improved technical solution of the present invention, the third post-processing carrier assembly is connected in parallel with the fourth post-processing carrier assembly.

As a further improved technical solution of the present invention, the first post-processing carrier assembly extends along the first axial direction, the second post-processing carrier assembly extends along the second axial direction, the third post-processing carrier assembly extends along the third axial direction, the fourth post-processing carrier assembly extends along the fourth axial direction, wherein the first axial direction and the second axial direction are aligned, the second axial direction the third axial direction and the fourth axial direction are parallel to each other.

As a further improvement of the present invention, the third aftertreatment support assembly includes a selective catalytic reduction agent.

As a further improved aspect of the present invention, the fourth aftertreatment support assembly includes a selective catalytic reduction agent.

Compared with the prior art, the utility model discloses a mixing tube is equipped with and extends into in the first hybrid chamber and be close to the airflow baffle and the edge of the export of second aftertreatment carrier subassembly the circumference of mixing tube is upward located the peripheral air inlet of airflow baffle, air inlet with the cavity of mixing tube is linked together. By the arrangement, on one hand, the tail gas flowing out of the second aftertreatment carrier component can be prevented from directly entering the cavity of the mixing pipe in a large amount, so that the urea spray is excessively blown and deflected, and the mixing uniformity of urea liquid drops and the tail gas is improved; on the other hand, the arrangement of the airflow inlet is beneficial to reducing the back pressure.

Drawings

Fig. 1 is a schematic perspective view of the box-type exhaust aftertreatment package according to an embodiment of the present invention.

Fig. 2 is a partially exploded perspective view of fig. 1.

FIG. 3 is a further exploded perspective view of FIG. 2, wherein the first mixing chamber housing is not shown.

Fig. 4 is a further exploded perspective view of fig. 3.

Detailed Description

The present invention will be described in detail with reference to the drawings, wherein if there are several embodiments, the features of these embodiments can be combined with each other without conflict. When the description refers to the accompanying drawings, like numbers or symbols in different drawings represent the same or similar elements unless otherwise specified. The matters described in the following exemplary embodiments do not represent all embodiments of the present invention, but rather they are merely examples of products consistent with the present invention as recited in the claims of the present invention.

The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. It should be understood that the terms "first," "second," and the like as used in the description and in the claims of the present invention do not denote any order, quantity, or importance, but rather are used to distinguish one element from another.

Referring to fig. 1 to 4, the present invention discloses a box-type exhaust aftertreatment package 100, which includes a housing (not shown), a first baffle 21 and a second baffle 22 disposed at two ends of the housing at intervals, an intake cone 1 for the exhaust to enter, a first aftertreatment carrier assembly 31 communicated with the intake cone 1 and located at a downstream of the intake cone 1, a second aftertreatment carrier assembly 32 communicated with the first aftertreatment carrier assembly 31 and located at a downstream of the first aftertreatment carrier assembly 31, a first mixing chamber housing 41 communicated with the second aftertreatment carrier assembly 32 and located at a downstream of the second aftertreatment carrier assembly 32, a mixing pipe 5 communicated with the first mixing chamber housing 41, a second mixing chamber housing 42 communicated with the mixing pipe 5, a third aftertreatment carrier assembly 33 communicated with the second mixing chamber housing 42, and the second mixing chamber housing 42 A fourth aftertreatment carrier assembly 34 in communication. The box-style exhaust aftertreatment package 100 further includes a first tailpipe 61 in communication with the third aftertreatment carrier assembly 33 and a second tailpipe 62 in communication with the fourth aftertreatment carrier assembly 34.

Specifically, in one embodiment of the present invention, the first aftertreatment carrier assembly 31 includes a Diesel Oxidation Catalyst (DOC), the second aftertreatment carrier assembly 32 includes a diesel particulate trap (DPF), the third aftertreatment carrier assembly 33 includes a selective catalytic reduction agent (SCR), and the fourth aftertreatment carrier assembly 34 includes a selective catalytic reduction agent (SCR). The third aftertreatment carrier assembly 33 is connected in parallel with the fourth aftertreatment carrier assembly 34. The second aftertreatment carrier assembly 32 is detachably connected to the first aftertreatment carrier assembly 31. For example, the second aftertreatment carrier assembly 32 may be removably attached to the first aftertreatment carrier assembly 31 by clips. So configured, cleaning and maintenance of the second aftertreatment carrier assembly 32 is facilitated.

The first mixing chamber housing 41 is provided with a first mixing chamber 410 and a urea nozzle mounting seat 411, the urea nozzle mounting seat 411 is used for mounting a urea nozzle (not shown) which is used for spraying atomized urea liquid drops into the mixing pipe 5.

The second mixing chamber housing 42 is provided with a second mixing chamber 420, a first connection port 421 communicated with the second mixing chamber 420, and a second connection port 422 communicated with the second mixing chamber 420, wherein the first connection port 421 is connected with the third post-processing carrier component 33, and the second connection port 422 is connected with the fourth post-processing carrier component 34.

The first aftertreatment carrier assembly 31 extends in a first axial direction a1, the second aftertreatment carrier assembly 32 extends in a second axial direction a2, the third aftertreatment carrier assembly 33 extends in a third axial direction A3, and the fourth aftertreatment carrier assembly 34 extends in a fourth axial direction a4, wherein the first axial direction a1 and the second axial direction a2 are aligned, and the second axial direction a2, the third axial direction A3, and the fourth axial direction a4 are parallel to one another.

The mixing pipe 5 is provided with a circular ring part 51 extending into the first mixing chamber 410, an airflow baffle plate 52 extending from a part of the edge of the circular ring part 51 close to the second aftertreatment carrier assembly 32, and an airflow inlet 53 located at the periphery of the airflow baffle plate 52 along the circumferential direction of the mixing pipe 5. The airflow baffle 52 is provided with a circular arc-shaped outer surface to better disperse the exhaust gas impinging on the outer surface. The gas flow inlet 53 communicates with the chamber 50 of the mixing tube 5. In the illustrated embodiment of the present invention, the airflow inlet 53 has a circular arc shape, and is combined with the airflow baffle 52 to form a circle.

Compared with the prior art, the utility model discloses a set up with first tail pipe 61 that third aftertreatment carrier subassembly 33 is linked together and with second tail pipe 62 that fourth aftertreatment carrier subassembly 34 is linked together make third aftertreatment carrier subassembly 33 with fourth aftertreatment carrier subassembly 34 has respective tail pipe respectively to the backpressure has been reduced.

In addition, by providing the airflow baffle 52, on the one hand, the exhaust gas flowing out of the second aftertreatment carrier assembly 32 can be prevented from directly entering the cavity 50 of the mixing pipe 5 in a large amount; in contrast, the exhaust gas flowing from the second aftertreatment carrier assembly 32 is dispersed circumferentially under the obstruction of the flow baffle 52, thereby facilitating improved uniformity of the gas flow as it enters the mixing tube cavity 50; on the other hand, the arrangement of the airflow baffle 52 can also prevent a large amount of exhaust gas flowing out of the second aftertreatment carrier assembly 32 from blowing urea spray beams off, thereby being beneficial to improving the mixing uniformity of urea liquid drops and the exhaust gas. In addition, by arranging the airflow inlet 53, the inlet area of the tail gas entering the cavity 50 of the mixing pipe 5 is enlarged, which is beneficial to reducing the back pressure.

The above embodiments are only used for illustrating the present invention and not for limiting the technical solutions described in the present invention, and the understanding of the present specification should be based on the technical personnel in the technical field, and although the present specification has described the present invention in detail with reference to the above embodiments, the skilled personnel in the art should understand that the technical personnel in the technical field can still modify or substitute the present invention, and all the technical solutions and modifications thereof that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims (10)

1. The utility model provides a box formula tail gas aftertreatment encapsulation which characterized in that: the device comprises a first post-treatment carrier component, a second post-treatment carrier component communicated with the first post-treatment carrier component and positioned at the downstream of the first post-treatment carrier component, a first mixing cavity shell communicated with the second post-treatment carrier component and positioned at the downstream of the second post-treatment carrier component, a mixing pipe communicated with the first mixing cavity shell, a second mixing cavity shell communicated with the mixing pipe and a third post-treatment carrier component communicated with the second mixing cavity shell, wherein the first mixing cavity shell is provided with a first mixing cavity and a urea nozzle mounting seat, the urea nozzle mounting seat is used for mounting a urea nozzle, the urea nozzle is used for spraying atomized urea liquid drops into the mixing pipe, the mixing pipe is provided with an air flow baffle extending into the first mixing cavity and close to the outlet of the second post-treatment carrier component and an air flow baffle positioned at the periphery of the air flow baffle along the circumferential direction of the mixing pipe And the airflow inlet is communicated with the cavity of the mixing pipe.

2. A box-style exhaust aftertreatment package according to claim 1 wherein: the second aftertreatment carrier assembly is provided with a first center, the mixing tube is provided with a second center, and the airflow baffle is close to the second aftertreatment carrier assembly on a connecting line along the first center and the second center.

3. A box-style exhaust aftertreatment package according to claim 1 wherein: the mixing pipe is provided with a circular ring part extending into the first mixing cavity, and the airflow baffle plate extends from a part of the edge of the circular ring part close to the second aftertreatment carrier component.

4. A box-style exhaust aftertreatment package according to claim 1 wherein: the first aftertreatment support assembly includes a diesel oxidation catalyst.

5. A box-style exhaust aftertreatment package according to claim 4 wherein: the second aftertreatment carrier assembly includes a diesel particulate trap, the second aftertreatment carrier assembly being detachably connected to the first aftertreatment carrier assembly.

6. A box-style exhaust aftertreatment package according to claim 1 wherein: the second mixing cavity shell is provided with a second mixing cavity, a first connecting port communicated with the second mixing cavity and a second connecting port communicated with the second mixing cavity, wherein the first connecting port is connected with the third aftertreatment carrier component, and the box-type exhaust aftertreatment package further comprises a fourth aftertreatment carrier component connected with the second connecting port.

7. A box-style exhaust aftertreatment package according to claim 6 wherein: the third aftertreatment carrier assembly is connected in parallel with the fourth aftertreatment carrier assembly.

8. A box-style exhaust aftertreatment package according to claim 7 wherein: the first aftertreatment carrier assembly extends in a first axial direction, the second aftertreatment carrier assembly extends in a second axial direction, the third aftertreatment carrier assembly extends in a third axial direction, and the fourth aftertreatment carrier assembly extends in a fourth axial direction, wherein the first axial direction and the second axial direction are aligned, and the second axial direction, the third axial direction, and the fourth axial direction are parallel to each other.

9. A box-style exhaust aftertreatment package according to claim 1 wherein: the third aftertreatment support assembly includes a selective catalytic reduction agent.

10. A box-style exhaust aftertreatment package according to claim 6 wherein: the fourth aftertreatment support assembly includes a selective catalytic reduction agent.

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