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High-pressure SCR system with high efficiency and emission reduction for ships

An SCR system and high-efficiency technology, applied in exhaust gas treatment, exhaust equipment, mechanical equipment, etc., can solve the problem of insufficient urea atomization evaporation and hydrolysis pyrolysis reaction, low nitrogen oxide conversion efficiency and urea utilization rate, and urea Uneven mixing with exhaust gas, etc., to reduce crystallization and corrosion problems, reduce contact, and ensure flow field and uniformity

Pending Publication Date: 2019-10-01
中国船舶重工集团柴油机有限公司
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Problems solved by technology

The inventor found that in the mixer of the existing SCR system, the atomization and evaporation of urea and the hydrolysis and pyrolysis reaction are insufficient, and the mixing of urea and tail gas is uneven, resulting in the conversion efficiency of nitrogen oxides in the SCR reactor and the utilization rate of urea. Low, high ammonia slip rate

Method used

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  • High-pressure SCR system with high efficiency and emission reduction for ships
  • High-pressure SCR system with high efficiency and emission reduction for ships
  • High-pressure SCR system with high efficiency and emission reduction for ships

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Embodiment Construction

[0031] The present disclosure will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

[0033] It should be noted that the terminology used herein is only for describing specific embodiments, and is not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof. I...

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Abstract

The invention discloses a high-pressure SCR (selective catalytic reduction) system with high efficiency and emission reduction for ships. Through arranging a spoiler at the inlet of a mixer, and sequentially arranging a rectifier and a flow equalizing plate at the inlet of a reactor, mixing degree of reducing agents such as urea solution and waste gas to be treated is improved; mixed waste gas isuniformly distributed on the cross section of a flow passage and vertically enters a catalyst hole; abrasion of a catalyst is reduced; ash deposited on the surface of the catalyst is timely and regularly cleaned; blocking of the catalyst is avoided; denitration efficiency of the whole system is improved; ammonia escape rate is reduced; and nitrogen oxide emission is reduced.

Description

technical field [0001] The present disclosure relates to the related technical field of ship exhaust gas treatment technology, and specifically relates to a high-pressure SCR system for high-efficiency emission reduction for ships. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] With the development of economic globalization, the situation of world trade has undergone dramatic changes. The rapid growth of international trade has led to a rapid increase in the world's shipping volume, while the environmental pollution caused by ship exhaust is becoming increasingly serious. Nitrogen oxides are one of the main components of ship exhaust pollutants, and their hazards include: photochemical smog, acid rain, tropospheric ozone, and ozone layer depletion. Since 2016, the International Maritime Organization has formulated stricter emission reg...

Claims

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Application Information

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IPC IPC(8): F01N3/28F01N3/20
CPCF01N3/28F01N3/2892F01N3/2066F01N3/2013F01N3/2839F01N3/2093F01N2590/02F01N2610/02F01N2570/14Y02T10/12
Inventor 张光伟骆素爽刘佃涛齐光高兴家吕律洪维华
Owner 中国船舶重工集团柴油机有限公司
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