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Engine exhausted gas post-treatment mixing device and post-treatment device and application thereof

A technology of exhaust aftertreatment and mixing device, which is applied in exhaust treatment, exhaust device, engine components, etc., to achieve the effect of facilitating evaporation and pyrolysis, large heat transfer area, and improving anti-crystallization ability

Inactive Publication Date: 2017-08-22
TENNECO SUZHOU EMISSION SYST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, in order to ensure that the perforated plate 1' has sufficient mechanical strength, the material part between the perforated holes 2' is unavoidable

Method used

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  • Engine exhausted gas post-treatment mixing device and post-treatment device and application thereof
  • Engine exhausted gas post-treatment mixing device and post-treatment device and application thereof
  • Engine exhausted gas post-treatment mixing device and post-treatment device and application thereof

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Embodiment Construction

[0032] Please refer to Figure 3 to Figure 13 As shown, the present invention discloses an engine exhaust aftertreatment device 100, which is used in aftertreatment systems such as SCR to treat engine exhaust. The engine exhaust aftertreatment device 100 includes an engine exhaust aftertreatment mixing device 10, a diesel oxidation catalyst (DOC) 20 and a diesel particulate filter located upstream of the engine exhaust aftertreatment mixing device 10 and serially connected in series (DPF) 30 , and a selective catalytic reductant (SCR) 40 downstream of the engine exhaust aftertreatment mixing device 10 .

[0033] The engine exhaust aftertreatment mixing device 10 includes a housing 1, a mixing element 2 installed in the housing 1, and a fine fiber element 3 for further increasing the evaporation and pyrolysis of urea droplets.

[0034] In the illustrated embodiment of the present invention, the housing 1 is cylindrical, and it is provided with a mounting plate 11 recessed into...

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Abstract

An engine exhausted gas post-treatment mixing device comprises an installation base and a mixing element, wherein the installation base is used for installing a urea spray nozzle, and the mixing element is located on the downstream portion of the installation base. The mixing element is used for mixing urea drops with exhausted gas. The engine exhausted gas post-treatment mixing device further comprises a fine fiber element which is located on the downstream portion of the installation base in the exhausted gas flow direction, and the urea drops are further crushed and evaporated. Through the arrangement, the engine exhausted gas post-treatment mixing device has high crystallization resistance. The invention further relates to application of a fine fiber element in the engine exhausted gas post-treatment mixing device and an engine exhausted gas post-treatment device provided with the mixing device.

Description

technical field [0001] The invention relates to an engine exhaust aftertreatment mixing device, the aftertreatment device and its application, and belongs to the technical field of engine exhaust aftertreatment. Background technique [0002] At present, the metal structure of the mixer is used in the industry to achieve the mixing of urea droplets and exhaust gas. Usually, structures such as perforated plates and fins are set in the mixer to allow the urea droplets to collide with the metal-structured mixer so that the urea droplets are broken into smaller droplets to facilitate evaporation and pyrolysis on the metal surface . The status quo is due to the upgrade of emission regulations, which makes the current urea injection strategy more aggressive, such as starting a larger amount of urea injection at lower temperature and smaller exhaust flow. There is a heat conservation relationship here, one is the heat required for the evaporation and pyrolysis of urea droplets, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/20F01N3/28
CPCF01N3/2066F01N3/28F01N2250/02F01N2610/02F01N2610/1486
Inventor 李军良
Owner TENNECO SUZHOU EMISSION SYST
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