基于废气再循环的防爆柴油机清洁燃烧技术

Clean Combustion Technology of Explosion-Proof Diesel Engine Based on Exhaust Gas Recirculation

针对某型煤矿用防爆柴油机NO_(x)排放物污染严重、危害大的问题,分析防爆柴油机的燃烧过程,建立燃烧数学模型。通过流体仿真分析软件对基于废气再循环系统的防爆柴油机的清洁燃烧过程模拟仿真并进行台架试验。试验结果表明:在8种工况下加装废气再循环的系统在优化后的废气再循环开度下防爆柴油机CO排放加权平均值为0.0045%,与未加装废气再循环的系统相比体积分数增加0.0045%;加装废气再循环的系统在优化后的废气再循环开度下防爆柴油机NO_(x)排放加权平均值为93.35×10^(-6),与未加装废气再循环的系统相比降低56.17%,采用废气再循环的系统对降低防爆柴油机的NO_(x)排放效果明显。

In response to the serious pollution and significant harm of NO_(x) emissions from an explosionproof diesel engine used in a coal mine,the combustion process of the explosion-proof diesel engine was analyzed and a combustion mathematical model was established.The clean combustion process of an explosion-proof diesel engine based on exhaust gas recirculation system was simulated and analyzed using fluid simulation analysis software,and then bench tests were conducted.The experimental results show that:With the optimized exhaust gas recirculation opening,the weighted average CO emission of explosion-proof diesel engines with an exhaust gas recirculation system installed under eight operating conditions is 0.0045%,which increases the volume fraction by 0.0045%compared to those without an exhaust gas recirculation system;The weighted average value of NO_(x) emissions of explosion-proof diesel engines with an optimized exhaust gas recirculation system is 93.35×10^(-6),which is 56.17%lower than that without an exhaust gas recirculation system;The use of exhaust gas recirculation system technology has significantly improved the reduction of NO_(x) emissions from explosion-proof diesel engines.