Abstract: Exhaust pollutants such as SO_x,NO_x and PM emitted by marine diesel engines are harmful to human health and environment,especially near port cities. With growing concerns on environmental protection,regulations become more and more stringent,and marine emissions also receive increasing attention. In this paper,existing ship exhaust control technologies were reviewed,including pre-treatment,in-cylinder cleaning and after-treatment technologies. Single after-treatments are believed to be able to serve the near-term needs. Desulfurization tower,selective catalytic reduction (SCR)and diesel particulate filter(DPF)are more promising to deal with SO_x,NO_x and PM,respectively. Through the analysis of different post-treatment technologies of SO_x,NO_x and PM,it is considered that the integrated treatment technology combining de-SO_x,de-NO_x and PM after-treatment is an important direction in the long run. Some key technologies enabling such a system include sulfur-tolerant catalysts and low temperature catalysts,fine particle removal technology,process optimization,simple and reliable control as well as acceptable space and cost requirement.

Key words: ship emission, pre-treatment, in-cylinder cleaning, after-treatment technologies, integrated treatment

摘要： 船舶柴油机排放的SO_x、NO_x、颗粒物（PM）等尾气污染物给人类生活环境和身体健康带来很大危害，对港口城市而言，这一情况更加严重。随着人们对环保的重视，各项环保法规越来越严格，船舶尾气污染物的排放控制也受到更多关注。本文对现有的船舶尾气控制技术进行了梳理，包括机前处理、机内净化以及后处理技术，提出单一后处理技术有望为近期提供更好的解决方案，其中，脱硫塔、选择性催化还原技术（SCR）和颗粒捕集技术（DPF）分别是比较有前景的应对SO_x、NO_x和PM的单一后处理技术。通过分析SO_x、NO_x、PM的不同后处理技术，认为将脱硫、脱硝和除颗粒物结合的一体化处理技术从长远来看是一个主要方向。一体化系统的研究重点可能包括开发新型耐硫、适应低温的催化剂，细颗粒物去除，优化工艺流程，简便和可靠的运行操作以及可接受的空间和费用要求等。

关键词: 船舶排放, 机前处理, 机内处理, 后处理技术, 一体化技术