柴油机排气微粒旋流净化技术的初步研究

Preliminary Study on Cyclone Filtration Technology for Reducing Diesel Engine Particulate Emissions

根据柴油机排气微粒净化的要求 ,研制了一台柴油机排气微粒轴流直流式旋流净化器 ,并对旋流净化器的净化特性进行了初步的理论分析和试验研究。研究结果表明 ,排气微粒旋流净化技术对净化柴油机排气微粒是有效的 ;柴油机运行工况及旋流子结构参数等对排气微粒净化效率有一定影响 ;排气微粒的凝聚是微粒旋流分离净化的前提。通过对净化器结构的优化设计以及采取必要的微粒凝聚措施 ,相信会显著地提高柴油机排气微粒旋流净化器的净化效率。

In this paper a preliminary investigation on the cyclone filtration technology for controlling the exhaust particulate from a direct injection diesel is conducted.Experimental results show that this technology has the potential to reduce particulate because of its simplicity,reliability and low flow resistance.Although the efficiency of the cyclone used in present experiments is low,the result of theoretical analysis indicates that its design has much space for improvement.Through the improvement of the cyclone design in construction with the use of particulate agglomerator and exhaust gas recirculation,the efficiency of particulate reduction may be much improved.