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System and method for reducing NOx emission of marine diesel engine

A marine diesel engine, diesel engine technology, applied in the direction of charging system, machine/engine, exhaust treatment device electronic control, etc., can solve the problems of high cost of use, limited effect of reduction, large loss of marine diesel engine, etc., to achieve excess air Small coefficient, reduced NOx generation, and large latent heat of vaporization

Inactive Publication Date: 2016-07-20
SHANGHAI MARITIME UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But these two methods are to NO x The effect of reduction is limited, and the loss of marine diesel engines is relatively large, and the use cost is high, so it is difficult to widely apply to marine diesel engines

Method used

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  • System and method for reducing NOx emission of marine diesel engine
  • System and method for reducing NOx emission of marine diesel engine

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Embodiment Construction

[0019] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0020] Such as figure 1 As shown, the reduction of marine diesel engine NO provided by the present invention x The emission system includes the intake air pre-treatment system and the after-treatment selective catalytic reduction system.

[0021] The air intake pre-treatment system includes an alternative fuel supply system and a fuel electronic control system.

[0022] The fuel electronic control system can control the alternative fuel supply system by collecting the working condition information of the cylinder 1 of the diesel engine.

[0023] Alternative fuels include oxygenated fuels and natural gas, among others.

[0024] The alternative fuel supply system is capable of injecting alternative fuel into cylinder 1 of the diesel engine.

[0025] The alternate fuel supply system includes an alternate fuel injection device and an alternate...

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Abstract

The invention discloses a system and method for reducing NOx emission of a marine diesel engine. The system comprises an air inlet pre-treatment system and a posttreatment selective catalytic reduction system. The air inlet pre-treatment system comprises an alternate fuel supply system and a fuel electronic control system. The posttreatment selective catalytic reduction system is arranged on a diesel engine exhaust pipe and can receive tail gas exhausted by a diesel engine air cylinder. The posttreatment selective catalytic reduction system comprises a diesel oxidation catalyst device and a selective catalytic reduction device which are sequentially arranged. The invention further provides the method for reducing NOx emission of the marine diesel engine with the system. According to the system and method for reducing NOx emission of the marine diesel engine, traditional petroleum fuel, namely diesel consumed by the marine diesel engine is replaced, meanwhile, NOx emission of the marine diesel engine can be greatly reduced, NOx emission is maintained at a very low level, and efficient clean combustion of the marine diesel engine is achieved.

Description

technical field [0001] The present invention relates to a system and method for treating exhaust gas from marine diesel engines in the air pollution control technology, in particular, it relates to a selective catalytic reduction system for reducing the NOx of marine diesel engines by combining pre-intake treatment with post-treatment. x Systems and methods for emissions. Background technique [0002] Marine diesel engines are the mainstream power for logistics, passenger transportation and national defense in my country, with high fuel consumption and high harmful emissions. Its emissions of nitrogen oxides (NO x ) is one of the main air pollutants, NO x The hazards of pollution mainly include the following three aspects: produce acid rain and cause ecological damage; damage human health, especially the respiratory tract; destroy the ozone layer and aggravate the greenhouse effect. For ship pollutants, the International Maritime Organization (IMO) has formulated correspo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D19/06F02M21/02F02M37/00F02M37/10F02D41/30F01N3/10F01N3/20F02D41/38F01N3/28F01N11/00F01N9/00
CPCF01N3/106F01N3/2066F01N3/208F01N3/28F01N9/00F01N11/00F01N11/002F01N2560/021F01N2560/026F01N2560/06F01N2560/08F01N2560/14F01N2570/10F01N2570/12F01N2570/14F01N2590/021F01N2610/02F02D19/06F02D19/0647F02D41/0025F02D41/3094F02D41/38F02D41/401F02D2200/02F02D2200/023F02D2200/101F02D2250/36F02M21/0215F02M21/0218F02M21/0245F02M37/00F02M37/10Y02T10/30Y02T10/40
Inventor 耿鹏魏立江曹尔明蒋楷张春辉
Owner SHANGHAI MARITIME UNIVERSITY
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