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Tail gas post-treatment mixing device

A technology of exhaust after-treatment and mixing device, applied in exhaust treatment, exhaust device, muffler device, etc., can solve the problem of poor urea crystallization and urea distribution uniformity, uneven mixing of exhaust gas and urea, affecting the effect of after-treatment, etc. problem, to achieve the effect of improving the degree of mixing uniformity and reducing the amount of crystallization

Active Publication Date: 2020-05-15
HEBEI YILI RUBBER & PLASTIC GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many problems to be solved in the application, among which the more prominent problems are urea crystallization and poor urea distribution uniformity, resulting in low SCR conversion efficiency, uneven mixing of tail gas and urea, and affecting post-treatment effect

Method used

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  • Tail gas post-treatment mixing device
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  • Tail gas post-treatment mixing device

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Embodiment Construction

[0028] Such as Figure 1-4 As shown, the present invention includes an air inlet chamber 1 and an air outlet chamber 2 that is rotatably connected and communicated with the air inlet chamber 1. The position between the air inlet chamber 1 and the air outlet chamber 2 can be set arbitrarily. 2 can be arranged horizontally, vertically or obliquely. In this embodiment, the air inlet cavity 1 and the air outlet cavity 2 are distributed up and down.

[0029] The air intake chamber 1 and the air outlet chamber 2 are respectively provided with an air inlet deflector 4 and an air outlet deflector 5; The deflector 4 , the space between the intake chamber body and the intake deflector 4 forms a cavity structure for the exhaust gas and urea to fully mix. The air outlet chamber 2 includes an air outlet chamber body and an air outlet deflector 5 covered on the air outlet chamber body, and the space between the air outlet chamber body and the air outlet deflector 5 forms a cavity structur...

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Abstract

The invention relates to a tail gas post-treatment mixing device. The tail gas post-treatment mixing device comprises a gas inlet cavity and a gas outlet cavity. A gas inlet guide plate is arranged onthe gas inlet cavity, and a gas outlet guide plate is arranged on the gas outlet cavity. A plurality of first gas inlets and a plurality of second gas inlets are formed in the gas inlet guide plate.Gas inlet blades are arranged on all or part of the second gas inlets, and the corresponding second gas inlet is formed in the position, corresponding to each gas inlet blade, of the gas inlet guide plate. Gas outlet blades are arranged on the gas outlet guide plate. A blade gas outlet is formed in the position, corresponding to each gas outlet blade, of the gas outlet guide plate. A urea nozzle connecting opening used for being connected with a urea nozzle is formed in the gas inlet cavity. By the adoption of the tail gas post-treatment mixing device, the mixing uniformity of the tail gas andthe urea is improved, and the crystallization amount is reduced.

Description

technical field [0001] The invention relates to the field of automobile exhaust systems, in particular to an exhaust gas post-treatment mixing device. Background technique [0002] The Selective Catalytic Reduction (SCR) post-treatment device is an exhaust gas treatment device that uses a vehicle-mounted urea solution to convert nitrogen oxides (NOX) produced by high-temperature engine combustion in the exhaust pipe into harmless nitrogen and water. With the upgrading of commercial vehicle exhaust emission regulations, selective catalytic reduction (SCR) after-treatment devices have been widely used in commercial vehicles. There are many problems to be solved in the application, among which the more prominent problems are urea crystallization and poor urea distribution uniformity, resulting in low SCR conversion efficiency, uneven mixing of tail gas and urea, and affecting post-treatment effect. Contents of the invention [0003] The technical problem to be solved by the ...

Claims

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Application Information

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IPC IPC(8): F01N3/20F01N3/28
CPCF01N3/2066F01N3/2892F01N2610/02F01N2610/1486
Inventor 薛红娟乔宝英李江飞牛雨飞朱海艳史运帅
Owner HEBEI YILI RUBBER & PLASTIC GROUP
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