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Mixing device

A technology of mixing device and mixing pipe, which is applied in the direction of muffler device, exhaust device, exhaust gas treatment, etc., can solve problems such as crystallization, and achieve the effect of reducing the amount of urea and reducing risks.

Active Publication Date: 2019-03-01
TENNECO SUZHOU EMISSION SYST
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  • Abstract
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Problems solved by technology

However, the urea droplets sprayed from the urea nozzle are likely to directly contact the wall of the mixing tube, resulting in crystallization

Method used

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Embodiment Construction

[0025] Please refer to Figure 1 to Figure 12 As shown, the present invention discloses an engine exhaust aftertreatment system 100, which includes a first aftertreatment assembly 1, a first mixing chamber assembly 2 communicating with the first aftertreatment assembly 1, and a first aftertreatment assembly 2 connected to the first aftertreatment assembly. The processing assembly 1 is arranged side by side with the second post-processing assembly 3 , the second mixing chamber assembly 4 communicating with the second after-processing assembly 3 , and the mixing tube assembly communicating with the first and second mixing chamber assemblies 2 and 4 5. The first post-processing component 1 and the second post-processing component 3 are connected in series through the first and second mixing chamber components 2 , 4 and the mixing tube component 5 .

[0026] In the illustrated embodiment of the present invention, the first aftertreatment assembly 1 includes a first housing 11, an...

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Abstract

The invention discloses a mixing device, and the mixing device is used in an engine exhaust post-processing system. The mixing device comprises a mixing pipe and a connecting pipe which is in communication with the mixing pipe. The mixing pipe comprises a hollow inner cavity, a plurality of fins surrounding the periphery of the inner cavity and distributed in the circumferential direction, and a plurality of grooves corresponding to the fins; the mixing pipe assembly further comprises a flow guide pipe located in the connecting pipe; and the flow guide pipe is fixed on the inner wall of the connecting pipe, a gap is formed between the outer surface of the flow guide pipe and the inner wall of the connecting pipe, and a plurality of penetrating through holes are formed in the outer surfaceof the flow guide pipe. By the arrangement, the amount of urea which is directly contacted with the pipe wall of the connecting pipe is reduced, and the risk of urea crystallization is reduced.

Description

[0001] This application is a divisional application of an application with an application date of June 3, 2016, an application number of 201610388059.1, and an invention title of "Engine Exhaust After-Treatment System". technical field [0002] The invention relates to a mixing device, which belongs to the technical field of engine exhaust aftertreatment. Background technique [0003] Engine exhaust after-treatment systems (such as diesel engine exhaust after-treatment systems) are mainly devices used to treat or evolve toxic and harmful substances in exhaust. Toxic substances in exhaust mainly include hydrocarbons, carbon monoxide, nitrogen oxides and particulate matter. [0004] In the prior art, there has been a combination of a diesel oxidation catalyst (DOC), a diesel particulate filter (DPF) and a selective catalytic reductant (SCR) to improve the efficiency of exhaust gas treatment. In one scheme, the oxidation-type catalytic converter and the particle trap are arran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/28F01N3/20
CPCF01N3/2066F01N3/2073F01N3/28F01N2240/20F01N2610/02F01N2610/1486F01N13/009F01N3/24
Inventor 王聪童毅君陈智毛伟王林
Owner TENNECO SUZHOU EMISSION SYST
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