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External mixed type rotary atomizing nozzle

A rotary atomization and hybrid technology, used in exhaust treatment, mechanical equipment, engine components, etc., can solve the problems of high risk of nozzle blockage, poor atomization, and low conversion efficiency, and achieve good air tightness, The effect of convenient disassembly, maintenance and repair, and improvement of NOx conversion efficiency

Inactive Publication Date: 2017-09-19
CHINA NORTH ENGINE INST TIANJIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention aims to propose an external mixing rotary atomizing nozzle to solve the problems of poor atomization degree, low conversion efficiency, ammonia leakage and high risk of nozzle clogging in the existing air-assisted urea injection system

Method used

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Embodiment Construction

[0020] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0021] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be interpreted...

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Abstract

The invention provides an external mixed type rotary atomizing nozzle. The external mixed type rotary atomizing nozzle comprises a nozzle body and an intake pipe. The nozzle body is of a funnel-shaped structure. A hydrocyclone is mounted in the nozzle body. The interior of the nozzle body is isolated into a nozzle upper cavity and a nozzle lower cavity by the hydrocyclone. A nozzle cover is mounted on the top of the nozzle body. A liquid inlet is formed in the nozzle cover. One end of the intake pipe is located above the nozzle cover, the other end of the intake pipe sequentially penetrates the nozzle cover and the nozzle upper cavity, and the hydrocyclone extends to the nozzle lower cavity. According to the external mixed type rotary atomizing nozzle, the hydrocyclone is mounted in the nozzle, a urea solution generates the liquid rotational flow through the hydrocyclone, liquid is broken and atomized by high-pressure air, and finer and more even droplets are achieved; and the risks of the ammonia leakage of an SCR system and the blocking of the nozzle are lowered effectively, and the NOx conversion efficiency can be improved.

Description

technical field [0001] The invention belongs to the technical field of fluid mechanics, in particular to an external mixing rotary atomizing nozzle. Background technique [0002] The existing SCR (Selective Catalytic Reduction Technology) urea injection system mainly has two types according to the form of spray atomization, that is, the air-assisted SCR urea injection system and the non-air-assisted SCR urea injection system. As emission regulations become more and more stringent, exhaust gas treatment technologies become more and more complex, and the requirements for the atomization quality of urea aqueous solution are also getting higher and higher. [0003] The commonly used air-assisted urea injection system generally achieves mixed atomization of gas and liquid at the outlet of the urea metering pump, and then sprays out through a simple nozzle structure. The atomization degree of this structure is not good, and there are problems of ammonia leakage and nozzle blockage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/20
CPCF01N3/2066F01N2610/02F01N2610/1453Y02T10/12
Inventor 王国莹许春光程秀围任庆霜仲蕾
Owner CHINA NORTH ENGINE INST TIANJIN
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