基于复合氧化还原体系的船舶动力废气多污染物协同处理关键理论及核心技术研究

船舶动力废气对世界环境造成了严重危害，由于单一污染物处理系统联用存在体积大、成本高等缺点，为满足IMO对船舶动力废气污染物的排放限制，航运业迫切需要集多污染物脱除功能于一体的技术。本项目突破传统NOx、SOx协同去除的技术瓶颈，通过构建过硫酸钠/尿素/海水复合氧化还原体系，实现船舶废气多污染物湿式协同高效处理。研究中利用过硫酸钠活性自由基促进NOx、SOx和PM的高效吸收，并通过在湿式体系下利用尿素还原亚硝酸盐抑制硝酸盐生成。同时研究将明确海水离子对吸收体系的影响，利用其强化机制，提高协同去除效率。研究将揭示过硫酸钠/尿素/海水氧化还原体系作用机理，获得基于这一机理设计船舶动力废气协同处理装置的新技术，并将这一技术在船舶柴油机上进行全工况匹配验证。最终，形成一种更为高效、经济的船舶动力废气多污染物协同处理系统，填补技术空白，凝练具有自主知识产权的关键技术。

Exhaust gas from marine diesel engines has caused serious harm to the world environment. Due to the large volume and high cost from the combination of single pollutant treatment system, the use of multi-pollutants treatment system to reduce the ship emissions has become an urgent need for the global shipping industry to meet the current and future restrictions imposed by the International Maritime Organization on the ship's emissions. This project breaks through the technical bottleneck of traditional NOx and SOx synergistic removal techniques and constructs a sodium persulfate/urea/seawater composite redox system to achieve wet and synergistic efficient treatment of ship exhaust multi-contaminants. In this study, sodium persulfate active radicals will be used to promote the high-efficiency absorption of NOx, SOx and PM and nitrate production will be inhibited by reducing nitrite with urea in the wet system. In addition, the influence of seawater ions on the absorption system will be clarified and its strengthening mechanism will be used to improve the synergistic removal efficiency. Moreover, the mechanism of sodium persulfate/urea/seawater redox system will be revealed and a new technology to design a ship's power exhaust gas co-processing device based on this mechanism will be obtained. Furthermore, this technology will be verified on the marine diesel engine under all working conditions. Finally, a more efficient and economical ship-powered exhaust multi-pollutant collaborative processing system will be formed to fill the technical gap and consolidate the key technologies with independent intellectual property rights.