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Marine compact type SCR catalysis silencer

A catalytic muffler, a compact technology, applied in mufflers, machines/engines, engine components, etc., can solve problems such as noise, achieve the effect of improving uniformity, prolonging operating life, and saving installation space

Active Publication Date: 2014-09-03
苏州添蓝动力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the background technology, the purpose of the present invention is to propose a marine compact SCR catalytic muffler, which integrates the SCR and the muffler, and simultaneously solves the noise of marine diesel engines and reduces NO X The problem of emission is avoided, and the wear between the catalyst block and the shell is avoided, the airtightness of the gas is ensured, and the convenience of catalyst installation and maintenance is improved

Method used

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  • Marine compact type SCR catalysis silencer
  • Marine compact type SCR catalysis silencer
  • Marine compact type SCR catalysis silencer

Examples

Experimental program
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Effect test

Embodiment 4

[0036] Example 4, such as Figure 6 As shown, the muffler device 6 includes an inner insertion pipe 17 and a built-in 18 plate located in the diffuser pipe 4; the inlet of the inner insertion pipe 17 is connected with the outlet of the inlet pipe 1, and the inner insertion pipe 17 There is a gap between the outlet and the built-in plate 18, and the built-in plate 18 is perpendicular to the axis of the inner insertion tube 17; hole; the outlet of the inner insertion tube 17 is provided with a sealing plate 16 for sealing the outlet of the inner insertion tube 17; In this way, although the reflection of the sound wave is reduced, the exhaust gas must experience two sudden expansions and contractions, which makes the effect of low-frequency noise better than that in Embodiment 3.

Embodiment 5

[0037] Embodiment 5, such as Figure 7 As shown, the difference between this embodiment and Embodiment 6 is that a plurality of through holes are evenly distributed on the sealing plate 16 . In this way, the total cross-sectional area of ​​the exhaust gas is increased, and the exhaust efficiency is improved. Preferably, the diameter of the upper through hole of the sealing plate 16 is equal to the diameter of the through hole on the tube wall of the inner insertion tube 17 .

[0038] In the above five embodiments of the muffler device, preferably, the cross-sections of the diffuser tube 4 and the shrink tube 5 are both rectangular.

[0039] In the above five embodiments of the muffler device, preferably, the length of the inner insertion pipe 6 is 1 / 4˜1 / 2 of the length of the diffuser pipe 4 .

[0040] In the above five embodiments of the muffler device, preferably, the diameter of the through hole on the inner insertion pipe 6 is 1 / 20-1 / 10 of the inner diameter of the exhau...

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Abstract

The invention discloses a marine compact type SCR catalysis silencer. SCR and the silencer are integrated, so that the problem that the exhaust back pressure of a marine engine is high is solved, SCR and exhaust silencing can be achieved at the same time, the installation space is reduced, the initial assembly cost is saved, and the economic value is high. A catalyst is packaged in a drawer mode, so that the abrasion and blockage problems in the operation process of the catalyst are solved, and the service life is prolonged. Meanwhile, an inner insertion pipe and an internally-arranged plate have the effect of a rectifier so that the distribution uniformity of the air flow at the front end of the catalyst can be improved, urea crystallization can be effectively prevented, solid particles in exhausted gas of the engine can be prevented from depositing, and the purpose of improving the conversion efficiency can be achieved. Two times of sudden expansion and contraction of the exhausted gas are carried out so that most low-frequency noise can be reduced.

Description

technical field [0001] The invention relates to an exhaust aftertreatment technology, in particular to a marine exhaust aftertreatment technology, more precisely a marine compact SCR catalytic muffler. Background technique [0002] NO X It is one of the main harmful emissions from marine diesel engines, causing serious harm to the environment and human health. IMO (International Maritime Organization) passed the 1997 Protocol of the "MARPOL73 / 78 Convention" in September 1997, and added annex VI "Regulations for the Prevention of Air Pollution from Ships", which was issued to my country on August 23, 2006 take effect. In October 2008, IMO formally passed the amendment to Annex VI of MARPOL73 / 78 "NO X Technical Regulations, for NO X Emissions proposed three stages of limit value requirements. Control the NO of the ship engine X Emissions have become an important issue in preventing air pollution from ships. [0003] Generally, marine diesel engines can meet the emission ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/28F01N13/00
Inventor 吕若菁喻洋
Owner 苏州添蓝动力科技有限公司
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