作者：乔靖¹, 王铁²

作者单位：1. 太原城市职业技术学院，山西 太原 030027;
2. 太原理工大学，山西 太原 030024

关键词：防爆柴油机;氧化催化器;颗粒捕集器;转化效率

摘要：

在某型防爆柴油机加装DOC+DPF后处理装置上进行台架实验，结果表明，PY03型装置不会增大防爆柴油机系统的排气背压，对CO平均转化效率达96%，对颗粒物有较高的捕集和再生效率，不透光烟度平均转化效率为82.7%；PY02型装置因尺寸较小，热负荷较高，与该排放状况不匹配。为提高装置的利用率和使用寿命，通过对耦合的DOC+DPF孔道进行可燃性气体CO组分输运和颗粒物离散相数值模拟。结果表明：随着废气流速的增大，DOC+DPF出口废气中CO浓度升高，转化效率下降；15 m/s的气流速度是发动机该排放水平下转化效率最高的最大速度；孔道入口速度增大，颗粒物向孔道后端壁面沉积；DOC+DPF装置在防爆柴油机上实用可行。

Application of DOC+DPF in anti-explosion diesel engine
QIAO Jing¹, WANG Tie²
1. Taiyuan City Vocational College, Taiyuan 030027, China;
2. Taiyuan University of Technology, Taiyuan 030024, China
Abstract: The bench test was carried out on a certain explosion-proof diesel engine equipped with DOC+DPF post-processing device. The results show that the PY03 device will not increase the exhaust back pressure of the explosion-proof diesel engine system. The CO average conversion efficiency is as high as 96%, and the particulate matter has a higher capture and regeneration efficiency. The average conversion efficiency of opacity smoke is 82.7%. The PY02 device has a smaller size. The heat load is high, which does not match the emission condition. In order to improve the utilization rate and service life of the device, the numerical simulation of CO component transport and particulate matter dispersion in combustible gas through the coupled DOC+DPF channel is carried out. The results show that with the increase of exhaust gas velocity, CO concentration in exhaust gas of DOC+DPF increases and conversion efficiency decreases; the exhaust gas velocity of 15 m/s is the engine emission. The maximum rate of conversion efficiency at horizontal level. The entrance velocity of the channel increases, and the particles deposit on the wall of the back end of the channel. The feasibility of application of DOC+DPF device in explosion-proof diesel engine is verified.
Keywords: anti-explosion diesel engine;DOC;DPF;conversion efficiency
2021, 47(4):158-164  收稿日期: 2020-06-25;收到修改稿日期: 2020-08-20
基金项目: 山西省煤基重点科技攻关项目(MJ2014-14)
作者简介: 乔靖（1992-），男，山西太原市人，硕士，研究方向为内燃机清洁能源、后处理
参考文献
[1] 中华人民共和国能源部. 煤矿用防爆柴油机械排气中一氧化碳、氮氧化物检测规范：MT220—1990[S].北京：中国标准出版社， 1990.
[2] MATSUMOTO H, ICHIHARA Y, NAGASAKI N. Development of the flameproof diesel vehicle applied new exhaust gas dry type treatment system[J]. Journal of the Mining and Materials Processing Institute of Japan, 2002, 118(2): 129-135
[3] 苏志伟. PODE/甲醇组合燃烧在防爆柴油机中应用研究[D]. 太原: 太原理工大学, 2016: 44-47.
[4] 雷煌. 基于电控单体泵技术的防爆柴油机性能试验研究[J]. 煤炭工程, 2015, 47(10): 100-103
[5] 王登化, 尹小定, 陈根琴. 防爆柴油机废气处理水箱结构优化研究[J]. 煤矿机械, 2019, 40(9): 122-124
[6] 胡乃涛, 张学敏, 林超群, 等. 柴油机用DPF技术及其再生系统的匹配与优化[J]. 环境工程学报, 2015, 9(8): 3902-3908
[7] NING J B, YAN F J. Composite control of DOC out-temperature for DPF regeneration[C]. IFAC-Papers, 2016, 49(11): 20-27.
[8] 张静, 孟忠伟, 刘苗, 等. 柴油机DOC+CDPF系统的过滤与再生性能试验研究[J]. 车用发动机, 2016, 225(4): 62-65
[9] GOTTBERG I, RYDQUIST J E, BACKLUND O, et al. New potential exhaust gas after-treatment technologies for “clean car” legislation[C]//International Congress & Exposition. 1991.