Engine and double-whirl mixing device thereof

A mixing device and double swirl technology, applied in fluid mixers, engine components, combustion engines, etc., can solve the problems of poor atomization, insufficient decomposition, and uneven mixing of exhaust gas.

Active Publication Date: 2017-02-01
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the operation of the vehicle, due to poor urea atomization, uneven mixing or insufficient decomposition, the sprayed urea droplets cannot be converted into NH3 in real time, but generate by-products, resulting in unstable reduction reactions, which affect the consistency of NOx emis

Method used

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  • Engine and double-whirl mixing device thereof
  • Engine and double-whirl mixing device thereof
  • Engine and double-whirl mixing device thereof

Examples

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Embodiment Construction

[0022] The purpose of this specific embodiment is to provide a double swirl flow mixing device, which can effectively avoid the problems of easy deposition of urea, poor atomization and uneven mixing with exhaust gas. The purpose of this specific embodiment is also to provide an engine comprising the above-mentioned double swirl mixing device.

[0023] Hereinafter, an embodiment will be described with reference to the drawings. In addition, the examples shown below do not limit the content of the invention described in the claims in any way. In addition, all the contents of the configurations shown in the following embodiments are not limited to be essential to the solution of the invention described in the claims.

[0024] Please refer to Figure 1-Figure 5 , the double swirl mixing device provided in this embodiment includes a mixing tube 11 , a conical mixer and a fan blade 14 .

[0025] Wherein, the mixing pipe 11 is used for mixing the exhaust gas and urea together. T...

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PUM

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Abstract

The invention discloses an engine and a double-whirl mixing device thereof. The double-whirl mixing device comprises a mixing tube, a conical mixer and fan-type blades, wherein the mixing tube is used for mixing tail gas with urea; the conical mixer comprises a conical tube, an outlet end of which extends into the mixing tube, and a plurality of conical whirl plates which are arranged on the side wall of the conical tube and are distributed in the circumferential direction; the diameter of the inlet end of the conical tube is smaller than that of the outlet end of the conical tube; and the fan-type blades are arranged at the outlet end of the conical tube. In this way, the double-whirl mixing device provided by the invention can effectively avoid the problems that urea is easily deposited, is atomized poorly and is not mixed uniformly with the tail gas.

Description

technical field [0001] The invention relates to the technical field of tail gas treatment, and more specifically relates to an engine and a double swirl flow mixing device thereof. Background technique [0002] Selective catalytic reduction technology (Selective Catalytic Reduction, SCR) refers to the use of ammonia, ammonia water, urea or hydrocarbons as the reducing agent, under the condition that the oxygen concentration is more than two orders of magnitude higher than the NOx concentration, highly selective and preferential reduction of NOx for N2. The role of catalysis is to reduce the activation energy of the decomposition reaction and lower the reaction temperature to a suitable temperature range. [0003] Because urea is non-toxic, does not have a great impact on the environment and human health, and is convenient for storage and transportation, it is more suitable as a NOx reducing agent in the vehicle SCR system. [0004] Diesel vehicles with SCR systems tend to ...

Claims

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Application Information

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IPC IPC(8): F01N3/28B01F5/00
CPCF01N3/28F01N2610/08F01N2610/02B01F25/10F01N3/2066F01N3/2892Y02T10/12B01F23/2132B01F25/103B01F2025/931B01F25/3131B01D53/9431
Inventor 王意宝张晓丽王奉双王东升张蒿张素英高伟
Owner WEICHAI POWER CO LTD
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