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Experimental Study on Reduction of Exhaust Emission from Marine Two-strike Diesel Engine

减少船用二冲程柴油机废气排放的试验研究

基本信息

批准号：
17206085
负责人：
TSUKAMOTO Tatsuro
金额：
$ 17.14万
依托单位：
Tokyo University of Marine Science and Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17206085/
关键词：
Marine Diesel Engine Particulate Matter Exhaust Emission Reduction Cylinder Lubricating Oil Air Pollution Two-stroke Engine 2ストロークディーゼル機関

项目摘要

Experimental investigation was conducted with low speed two-stroke, cross-head type, exhaust turbocharged marine diesel engine (Bore: 370 mm, Stroke: 880 mm, Output: 1105 kW, Engine speed: 188 rpm, Number of cylinder: 3) to know the characteristics of particulate emission and to study particulate and NOx reduction. Filters on which particulate matter collected were analyzed using X-ray fluorescence spectroscopy to examine the origin of particulate. The new lubricating system (high speed feed type lubricator)was equipped on the engine. It enables a precise feed of cylinder oil at an optimum timing by electronic control and can reduce the consumption of cylinder lubricating oil compared with conventional mechanical type lubricator. The following results are obtained.(1) The emission of particulate, SOF (soluble organic fraction) and ISF (insoluble organic fraction) increase with an increase in engine load, and the high rate of SOF were indicated in any load.(2) Particulate emission increases with an increase in cylinder oil feed rate. According to the analysis results of SOF components, cylinder lubrication has a significant effect on SOF emission.(3) The SOF and dry soot emission, as well as sulfate emission, increase with an increase in the sulfur content of fuel. The conversion rate from fuel sulfur into sulfate in particulate matter is nearly independent of the sulfur content in the fuel and increases with an increase in the engine load.(4) When the engine is operated with water emulsified fuel, NOx emission is reduced but specific fuel consumption and PM emission increase

为了解柴油机排气微粒排放特性，研究柴油机排气微粒和NOx的降低问题，在一台内径为370 mm、冲程为880 mm、功率为1105 kW、转速为188 rpm、气缸数为3的低速二冲程十字头式柴油机上进行了试验研究。使用X射线荧光光谱法对收集颗粒物的过滤器进行分析，以检查颗粒物的来源。新的润滑系统（高速进给式润滑器）安装在发动机上。它能够通过电子控制在最佳时刻精确地供给气缸油，并且与传统的机械式润滑器相比，可以减少气缸润滑油的消耗。获得了以下结果。(1)颗粒物、可溶性有机物（SOF）和不溶性有机物（ISF）的排放随负荷的增加而增加，且在任何负荷下SOF的排放率都很高。(2)微粒排放量随气缸供油速率的增加而增加。根据SOF组分分析结果，气缸润滑对SOF排放有显著影响。(3)SOF和干碳烟排放以及硫酸盐排放随着燃料硫含量的增加而增加。从燃料硫到颗粒物中硫酸盐的转化率几乎与燃料中的硫含量无关，并且随着发动机负荷的增加而增加。(4)当发动机燃用水乳化燃料时，NOx排放降低，但燃油消耗率和颗粒物排放增加