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A urea nozzle seat and nozzle device

A technology of urea nozzles and nozzles, which is applied in the field of exhaust aftertreatment devices and nozzle devices, can solve problems such as crystal formation, and achieve the effect of avoiding the formation of eddy currents and reducing the risk of accumulation of crystals

Active Publication Date: 2018-08-07
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a urea nozzle seat and a nozzle device. Since the urea nozzle seat is provided with a narrow and long inner cavity, it solves the problem that the urea is easy to flow when the nozzle device of the SCR system in the prior art sprays urea. Problems with crystal formation in the cavity of the urea nozzle housing

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  • A urea nozzle seat and nozzle device
  • A urea nozzle seat and nozzle device

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Embodiment Construction

[0026] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

[0027] In the description of the present invention, it should be noted that, unless otherwise specified, the meaning of "several" means one or more than one; The orientation or positional relationship shown in the figure is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a reference to this invention. Invention Limitations.

[0028] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the term...

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Abstract

The invention relates to the technical field of engines, and discloses a urea nozzle seat and a nozzle device. The urea nozzle seat comprises a seat body with a spraying hole in the bottom, a round inner cavity is defined by the side wall of the seat body, and a filling part matched with the inner cavity is arranged in the inner cavity. A long and narrow through hole is formed in the filling part and communicated with the spraying hole, and the width of the long and narrow through hole is smaller than the diameter of the spraying hole. The nozzle device comprises a nozzle and the urea nozzle seat. The urea nozzle seat is used for locating the nozzle and fixed to an SCR box. According to the urea nozzle seat and the nozzle device, due to the fact that the long and narrow inner cavity is formed in the urea nozzle seat, the problem that when urea is sprayed out of a nozzle device of an SCR system in the prior art, the urea is prone to be crystallized in a cavity of a urea nozzle seat is solved.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to an engine exhaust post-treatment device, and more particularly to a urea nozzle seat provided with a long and narrow inner cavity and a nozzle device with the urea nozzle seat. Background technique [0002] The specific principle of selective catalytic reduction technology (English name: Selective Catalytic Reduction, English abbreviation: SCR) is: use 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 , preferentially reduce NOx to N with high selectivity 2 . Among them, 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] The product of selective catalytic reduction technology is NO 2 and H 2 O, all products are non-polluting to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/28
CPCF01N3/2066F01N2610/02
Inventor 李志杰冯佳佳王作峰
Owner WEICHAI POWER CO LTD