Semipermeable-membrane-based device for reducing NOx emission of supercharged diesel engine

A technology of semi-permeable membrane and diesel engine, which is applied in the direction of exhaust device, noise reduction device, mechanical equipment, etc. It can solve the problem of high NOx emission of marine diesel engine, and achieve the effect of reducing NOx emission and content

Active Publication Date: 2015-03-11
HARBIN ENG UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] The object of the present invention is to provide a device for reducing the NOx emission of a supercharged diesel engine based on a semi-permeable membrane that improves the problem of excessive NOx emission from a marine diesel engine

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  • Semipermeable-membrane-based device for reducing NOx emission of supercharged diesel engine

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Embodiment Construction

[0013] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0014] combine figure 1 , including diesel engine 1, water tank 4, water pump 7, steam generator 8, water circulation pipeline 9, semipermeable membranes 2, 3, EGR pipeline 14, variable semipermeable membrane baffles 12, 13, etc. The water circulation system is composed of a water tank 4, a water pump 7, a steam generator 8, and a variable semi-permeable membrane baffle 12, and is connected to the rear air inlet of the compressor through the semi-permeable membrane 3. , lead it to the rear air inlet of the compressor, and connect with the air inlet 10 through the semi-permeable membrane 2 . When the diesel engine is working, because the air in the intake passage 10 is compressed by the compressor, the concentration of oxygen molecules and nitrogen molecules is high, while the concentration of water molecules in the waterway 9 is high, and the concentration of res...

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Abstract

The invention aims to provide a semipermeable-membrane-based device for reducing NOx emission of supercharged diesel engine. The device comprises the diesel engine, a turbosuperchager, a gas inlet passage, an exhaust passage, a water tank and a water circulating pipeline. The gas inlet passage and the exhaust passage are connected with the diesel engine. A gas compressor of the turbosuperchager is mounted on the gas inlet passage. A turbine of the turbosuperchager is mounted on the exhaust passage. An EGR (Exhuast Gas Recirculation) pipeline is mounted between the gas inlet passage and the exhaust passage. An inlet and an outlet of the water circulating pipeline are communicated with the water tank. The middle part of the water circulating pipeline is communicated with the gas inlet passage. A water circulating pipeline side semipermeable membrane is mounted at a communicating position of the water circulating pipeline and the gas inlet passage. An EGR pipeline side semipermeable membrane is mounted at a communicating position of the EGR pipeline and the gas inlet passage. A water pump and a water steam generator are mounted in the water circulating pipeline. According to the invention, the semipermeable membranes can be directly arranged on the wall of the gas inlet passage, so that mounting nozzles is avoided. The working areas of the semipermeable membranes can be adjusted by adjusting variable semipermeable blocking boards.

Description

technical field [0001] The invention relates to a diesel engine, in particular to an emission reduction device for a marine diesel engine. Background technique [0002] With the deterioration of the environment and the improvement of people's awareness of environmental protection, the pollutants of marine diesel engines have attracted widespread attention all over the world. How to control the harmful emissions of marine diesel engines is an urgent problem to be solved. Among them, NOx is one of the main harmful pollutants. The International Maritime Organization promulgated the Tier III nitrogen oxide emission limit standard in 2008, and it is expected to be implemented in 2016. It requires that the NOx emission value of marine diesel engines should be maintained at 2 -3.8g / Kwh. In marine diesel engines, the formation of NOx is mainly related to the concentration of oxygen molecules and nitrogen molecules, combustion temperature, and the residence time of nitrogen and oxyg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/022F01N13/08F02M25/07F02M26/04F02M26/13F02M26/35
CPCY02T10/12
Inventor 王银燕张超杨传雷王贺春陈德富李俊鹏覃玄
Owner HARBIN ENG UNIV
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