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Urea duplex double-scroll SCR mixer of diesel vehicle

A double-screw and mixer technology, which is used in machines/engines, exhaust gas treatment, mechanical equipment, etc., can solve the problems of insufficient hydrolysis and large back pressure, and achieve the effects of easy hydrolysis, low back pressure and large cross-sectional area.

Active Publication Date: 2017-01-04
NANJING IKAKAT EMISSIONS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the problems existing in the prior art, the purpose of the present invention is to overcome the shortage of working time of the above-mentioned mixer, solve the defects of large back pressure, compact layout, insufficient hydrolysis, etc.

Method used

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  • Urea duplex double-scroll SCR mixer of diesel vehicle
  • Urea duplex double-scroll SCR mixer of diesel vehicle
  • Urea duplex double-scroll SCR mixer of diesel vehicle

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Embodiment Construction

[0022] Below in conjunction with specific embodiment and accompanying drawing, the best embodiment of the present invention is described in detail: for example: the flow direction of air flow through each channel, and how the injection urea is atomized in the inside of the mixer and other working principles are described in detail.

[0023] The urea double helix double vortex SCR mixer for diesel vehicles in the embodiment of the present invention consists of 2 sets of helical blades, the air flow first passes through the main helical channel, and then the air flow is divided into two groups, which are mixed and passed through the two sets of helical blades to form two sets of double vortex Swirling air flow; the two air streams hit together, the urea is further broken, hydrolyzed, and finally further hydrolyzed and atomized by hitting the cylinder to form ammonia gas, so that the exhaust gas and ammonia gas are evenly mixed together; due to the double helix double vortex SCR T...

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Abstract

The invention discloses a urea duplex double-scroll SCR mixer of a diesel vehicle. The urea duplex double-scroll SCR mixer comprises a barrel (1), a guide column (11), an end cover (2), a front helical blade (6), a rear helical blade (10), a front baffle plate (5), a urea nozzle (8) and a distributing baffle plate (16); the front helical blade (6) and the rear helical blade (10) are installed on the guide column (11); the barrel (1), the front baffle plate (5), the front helical blade (6) and the end cover (2) form a single-direction main passage; the distributing baffle plate (16) is installed between the front helical blade (6) and the rear helical blade (10); and the urea nozzle (8) is arranged on the single-direction main passage. The duplex double-scroll SCR mixer is arranged inside the barrel, so that the back pressure is small, the space is compact, and the urea is uniformly atomized; the contradiction between the back pressure and the urea atomizing can be solved; and the problem of urea atomizing in the compact space can be solved.

Description

technical field [0001] The present invention designs a diesel vehicle urea double-screw double-scroll SCR mixer, which can be applied in the urea SCR after exhaust gas treatment. Background technique [0002] At present, as the country pays more and more attention to environmental protection laws, the diesel vehicle emission regulations of National IV and National V are gradually implemented, and the exhaust post-processor uses urea to reduce NO X More and more attention has been paid to it, and urea can only be combined with NO after being hydrolyzed into ammonia X The reaction occurs, and the hydrolysis of urea is currently mainly realized through a mixer, but the mixer currently used is likely to generate a large back pressure, which affects the engine power; and the hydrolysis of urea is not sufficient; it cannot effectively reduce NO X , and is prone to crystallization. Contents of the invention [0003] Aiming at the problems existing in the prior art, the purpose ...

Claims

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Application Information

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IPC IPC(8): F01N3/28F01N3/20
CPCF01N3/2066F01N3/2892F01N2240/20F01N2610/02Y02A50/20Y02T10/12
Inventor 袁可平闫政
Owner NANJING IKAKAT EMISSIONS TECH CO LTD
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