Tail gas after-treatment device

Abstract

A tail gas after-treatment device is suitable for a hydrogen fuel engine and comprises a shell, a mixing pipe, an after-treatment carrier assembly, a gas inlet pipe and a gas outlet pipe. The shell comprises an air inlet cavity, a second cavity and an air outlet cavity. And the air inlet pipe is communicated with the air inlet cavity. One end of the mixing pipe is communicated with the air inlet cavity, and the other end of the mixing pipe is communicated with the second cavity. The post-processing carrier assembly includes a post-processing carrier. And the air outlet pipe is communicated with the air outlet cavity. The tail gas after-treatment device is further provided with a drainage hole located in the bottom of the gas outlet cavity. Compared with the prior art, the tail gas after-treatment device comprises the after-treatment carrier assembly and the mixing pipe, and tail gas of the hydrogen fuel engine can be treated; in addition, effective drainage can be achieved through the drainage hole formed in the bottom of the air outlet cavity.

Description

Technical Field

[0001] The utility model relates to an exhaust gas post-processing device, belonging to the technical field of exhaust gas post-processing. Background Art

[0002] The diesel exhaust aftertreatment device in the related art generally includes a housing, an exhaust aftertreatment carrier encapsulated in the housing, a urea nozzle, an air inlet pipe and an air outlet pipe. In some cases, in order to improve the mixing uniformity of urea droplets and exhaust gas, the diesel exhaust aftertreatment device also includes a mixing device.

[0003] However, as the research on hydrogen fuel engines in related technologies deepens, they can replace diesel engines in many scenarios, but how to design an exhaust gas after-treatment device that can be compatible with hydrogen fuel engines is a technical problem faced by technicians in the relevant technical field. Utility Model Content

[0004] The utility model aims to provide an exhaust gas aftertreatment device suitable for a hydrogen fuel engine.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an exhaust gas after-treatment device, suitable for a hydrogen fuel engine, the exhaust gas after-treatment device comprises a shell, a first baffle fixed in the shell, a second baffle fixed in the shell, a mixing tube at least partially mounted on the first baffle and / or the second baffle, a after-treatment carrier assembly mounted on the first baffle and the second baffle, an intake pipe fixed to the shell, and an exhaust pipe fixed to the shell; the shell is provided with a first end wall and a second end wall opposite to the first end wall; the first end wall, the first baffle, the second baffle and the second end wall are arranged in sequence; the exhaust gas after-treatment device comprises a first end wall and a second end wall opposite to the first end wall; the first end wall, the first baffle, the second baffle and the second end wall are arranged in sequence; the exhaust gas after-treatment device comprises a first end wall and a second end wall; the first end wall, the first baffle, the second baffle and the second end wall are arranged in sequence; the exhaust gas after-treatment device comprises a first end wall and a second end wall; the first end wall, the first baffle, the second baffle and the second end wall are arranged in sequence; the exhaust gas after-treatment device comprises a first end wall and a second end wall; the first end wall and the second end wall are arranged in sequence ... The exhaust gas after-treatment device further comprises a plurality of swirl plates connected to the exhaust gas outlet cavity and a plurality of swirl plates connected to the exhaust gas outlet cavity. The exhaust gas after-treatment device further comprises a plurality of swirl plates connected to the exhaust gas outlet cavity and a plurality of swirl plates connected to the exhaust gas outlet cavity.

[0006] As a further improved technical solution of the utility model, the post-processing carrier assembly includes a packaging shell, and the post-processing carrier is packaged in the packaging shell.

[0007] As a further improved technical solution of the present invention, the packaging shell passes through the second baffle plate, the first baffle plate and the first end wall to be mounted on the second baffle plate, the first baffle plate and the first end wall.

[0008] As a further improved technical solution of the utility model, the air outlet cavity is arranged in the packaging shell.

[0009] As a further improved technical solution of the utility model, the packaging shell is provided with a protruding portion protruding from the first end wall, and the drainage hole is provided at the bottom of the protruding portion.

[0010] As a further improved technical solution of the utility model, the air outlet pipe is provided with a bell mouth located in the air outlet cavity, and the drainage hole is close to the bell mouth and located below the bell mouth.

[0011] As a further improved technical solution of the utility model, the exhaust gas after-treatment device includes an end plate fixed to the packaging shell, the end plate blocks the gas outlet cavity, and the gas outlet pipe passes through the end plate.

[0012] As a further improved technical solution of the utility model, the exhaust gas after-treatment device also includes a fairing located in the second cavity and facing the other end of the mixing pipe.

[0013] As a further improved technical solution of the utility model, the exhaust gas after-treatment device is further provided with a urea nozzle mounting seat located at one end of the mixing tube, the urea nozzle mounting seat is used to install a urea nozzle, and the urea nozzle is used to spray atomized urea droplets into the mixing tube.

[0014] As a further improved technical solution of the utility model, the exhaust gas after-treatment device also includes a sensor seat installed on the exhaust pipe, and the sensor seat is used to install a nitrogen oxygen sensor.

[0015] Compared with the prior art, the exhaust gas after-treatment device of the present invention includes an after-treatment carrier assembly and a mixing tube, which can treat the exhaust gas of a hydrogen fuel engine; in addition, since a hydrogen fuel engine produces more water when working, the present invention can achieve effective drainage by providing a drainage hole at the bottom of the air outlet cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of an exhaust gas after-treatment device of the utility model in one embodiment.

[0017] Figure 2 yes Figure 1 main view.

[0018] Figure 3 yes Figure 1 Top view of the .

[0019] Figure 4 yes Figure 1 Right view of .

[0020] Figure 5 is along Figure 4 Schematic diagram of the cross section along line AA.

[0021] Figure 6 yes Figure 5 A partial enlarged view of the circled portion B. DETAILED DESCRIPTION

[0022] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. If there are several specific embodiments, the features of these embodiments can be combined with each other without conflict. When the description involves the drawings, unless otherwise specified, the same numbers or symbols in different drawings represent the same or similar elements. The contents described in the following exemplary embodiments do not represent all embodiments of the present invention. On the contrary, they are only examples of products consistent with the present invention as recorded in the claims of the present invention.

[0023] The terms used in the present invention are only for the purpose of describing specific implementations and are not intended to limit the scope of protection of the present invention. It should be understood that the terms such as "first", "second" and similar terms used in the specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish the names of features.

[0024] Please refer to Figures 1 to 6 As shown, the utility model discloses an exhaust gas after-treatment device 100, which is suitable for a hydrogen fuel engine. The exhaust gas after-treatment device 100 comprises a housing 1, a first baffle 21 fixed in the housing 1, a second baffle 22 fixed in the housing 1, a mixing tube 3 at least partially mounted on the first baffle 21 and / or the second baffle 22, an after-treatment carrier assembly 4 mounted on the first baffle 21 and the second baffle 22, an intake pipe 5 fixed to the housing 1, and an exhaust pipe 6 fixed to the housing 1.

[0025] In the illustrated embodiment of the present invention, the housing 1 is provided with a first end wall 11 and a second end wall 12 opposite to the first end wall 11. The first end wall 11, the first baffle 21, the second baffle 22 and the second end wall 12 are sequentially arranged at intervals.

[0026] The exhaust gas aftertreatment device 100 includes an air inlet cavity 101 located between the first end wall 11 and the first baffle 21 , an intermediate cavity 103 located between the first baffle 21 and the second baffle 22 , a second cavity 103 located between the second baffle 22 and the second end wall 12 , and an air outlet cavity 104 .

[0027] The air intake pipe 5 is connected to the air intake cavity 101; one end of the mixing tube 3 is provided with a plurality of swirl plates 31 connected to the air intake cavity 101, and the other end of the mixing tube 3 is connected to the second cavity 103. The exhaust gas after-treatment device 100 is also provided with a urea nozzle mounting seat 32 located at one end of the mixing tube 3, and the urea nozzle mounting seat 32 is used to install a urea nozzle (not shown), and the urea nozzle is used to spray atomized urea droplets into the mixing tube 3. The exhaust gas after-treatment device 100 also includes a fairing 7 located in the second cavity 103 and facing the other end of the mixing tube 3. The mixed airflow of the exhaust gas and the urea droplets flows into the mixing tube 3 in a spiral shape under the guidance of the plurality of swirl plates 31. When the mixed airflow flows out of the mixing tube 3 from the other end of the mixing tube 3, the mixed airflow is rectified under the action of the fairing 7 with an arc-shaped inner surface 71, so that it can pass through the end surface of the post-processing carrier assembly 4 in a relatively uniform manner to improve the conversion efficiency.

[0028] The post-processing carrier assembly 4 includes a packaging shell 41 and a post-processing carrier 42 packaged in the packaging shell 41. The packaging shell 41 passes through the second baffle 22, the first baffle 21 and the first end wall 11 to be mounted on the second baffle 22, the first baffle 21 and the first end wall 11. One end of the post-processing carrier 42 is connected to the second cavity 103, and the other end of the post-processing carrier 42 is connected to the gas outlet cavity 104; the gas outlet pipe 6 is connected to the gas outlet cavity 104. In the embodiment shown in the figure of the utility model, the gas outlet cavity 104 is arranged in the packaging shell 41.

[0029] The exhaust gas post-treatment device 100 is also provided with a drainage hole 105 located at the bottom of the gas outlet cavity 104. In the illustrated embodiment of the utility model, the encapsulation shell 41 is provided with a protrusion 411 protruding from the first end wall 11, and the drainage hole 105 is provided at the bottom of the protrusion 411. It can be understood by those skilled in the art that by arranging the drainage hole 105 close to the gas outlet pipe 6, it is beneficial to use the flow of airflow to bring the generated water to the position of the drainage hole 105 when the treated exhaust gas is discharged from the exhaust gas post-treatment device 100, thereby facilitating drainage. The drainage hole 105 is arranged outside the shell 1, which is beneficial for inspection, cleaning, etc.

[0030] In the illustrated embodiment of the utility model, the outlet pipe 6 is provided with a bell mouth 61 located in the outlet cavity 104, and the drain hole 105 is close to the bell mouth 61 and is located below the bell mouth 61. The exhaust gas after-treatment device 100 also includes an end plate 43 fixed to the packaging shell 41, the end plate 43 blocks the outlet cavity 104, and the outlet pipe 6 passes through the end plate 43. The exhaust gas after-treatment device 100 also includes a sensor seat 62 installed on the outlet pipe 6, and the sensor seat 62 is used to install a nitrogen oxygen sensor. Of course, a person skilled in the art can understand that the sensor seat 62 can be multiple, for installing other types of sensors.

[0031] Compared with the prior art, the exhaust gas after-treatment device 100 of the present invention includes an after-treatment carrier assembly 4 and a mixing tube 3, which can treat the exhaust gas of a hydrogen fuel engine; in addition, since the hydrogen fuel engine produces more water when working, the present invention can achieve effective drainage by providing a drainage hole 105 located at the bottom of the air outlet cavity 104.

[0032] The above embodiments are only used to illustrate the present invention but not to limit the technical solutions described in the present invention. The understanding of this specification should be based on the technicians in the relevant technical field. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that technicians in the relevant technical field can still modify or replace the present invention with equivalents, and all technical solutions and improvements that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. An exhaust gas post-treatment device, suitable for a hydrogen fuel engine, characterized in that: The exhaust gas after-treatment device comprises a shell, a first baffle fixed in the shell, a second baffle fixed in the shell, a mixing tube at least partially mounted on the first baffle and / or the second baffle, a post-treatment carrier assembly mounted on the first baffle and the second baffle, an intake pipe fixed to the shell, and an exhaust pipe fixed to the shell; the shell is provided with a first end wall and a second end wall opposite to the first end wall; the first end wall, the first baffle, the second baffle and the second end wall are arranged in sequence; the exhaust gas after-treatment device comprises an intake cavity located between the first end wall and the first baffle, a An intermediate cavity between the first baffle and the second baffle, a second cavity between the second baffle and the second end wall, and an air outlet cavity; wherein the air inlet pipe is connected to the air inlet cavity; one end of the mixing tube is provided with a plurality of swirl plates connected to the air inlet cavity, and the other end of the mixing tube is connected to the second cavity; the after-treatment carrier assembly includes a after-treatment carrier, one end of the after-treatment carrier is connected to the second cavity, and the other end of the after-treatment carrier is connected to the air outlet cavity; the air outlet pipe is connected to the air outlet cavity; the exhaust gas after-treatment device is also provided with a drainage hole located at the bottom of the air outlet cavity.

2. The exhaust gas post-treatment device according to claim 1, characterized in that: The aftertreatment carrier assembly includes a packaging shell in which the aftertreatment carrier is packaged.

3. The exhaust gas post-treatment device according to claim 2, characterized in that: The packaging shell passes through the second baffle plate, the first baffle plate and the first end wall to be mounted on the second baffle plate, the first baffle plate and the first end wall.

4. The exhaust gas post-treatment device according to claim 3, characterized in that: The air outlet cavity is arranged in the packaging shell.

5. The exhaust gas post-treatment device according to claim 4, characterized in that: The packaging shell is provided with a protruding portion protruding from the first end wall, and the drainage hole is provided at the bottom of the protruding portion.

6. The exhaust gas post-treatment device according to claim 4, characterized in that: The air outlet pipe is provided with a bell mouth located in the air outlet cavity, and the drainage hole is close to the bell mouth and located below the bell mouth.

7. The exhaust gas post-treatment device according to claim 2, characterized in that: The exhaust gas after-treatment device comprises an end plate fixed to the packaging shell, the end plate blocks the gas outlet cavity, and the gas outlet pipe passes through the end plate.

8. The exhaust gas post-treatment device according to claim 1, characterized in that: The exhaust gas after-treatment device further includes a fairing located in the second cavity and facing the other end of the mixing tube.

9. The exhaust gas post-treatment device according to claim 1, characterized in that: The exhaust gas aftertreatment device is further provided with a urea nozzle mounting seat located at one end of the mixing tube, the urea nozzle mounting seat is used to mount a urea nozzle, and the urea nozzle is used to spray atomized urea droplets into the mixing tube.

10. The exhaust gas post-treatment device according to claim 1, characterized in that: The exhaust gas post-treatment device also includes a sensor seat installed on the exhaust pipe, and the sensor seat is used to install a nitrogen oxygen sensor.

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