柴油机微粒捕集器臭氧再生法离线再生

Diesel particulate trap offline regeneration by ozone oxidation

由R175型柴油机、微粒捕集器(Φ90 mm×150 mm)、CF-G10型臭氧发生器组成实验系统,进行了臭氧再生法离线再生研究。研究表明,在190℃温度下,再生气从DPF上游侧进气再生时,臭氧可以有效再生DPF,再生效率可达90%以上,再生效率达到65%左右时发生臭氧穿透,臭氧利用率下降;穿透时间点随微粒捕集时的柴油机载荷增大而提前,随微粒捕集时间增加而提前;臭氧供给量不变,再生气流量越大,再生效果越明显;再生气从DPF下游侧进气再生时,臭氧穿透时间点较上游侧进气再生滞后,但发生穿透后DPF几乎不再再生,总再生效率低于70%。结果表明,微粒捕集器臭氧再生法是可行的,对于如何提高臭氧利用率需进一步研究。

The diesel particulate trap regeneration by ozone oxidation was studied experimentally. The test system was consisted by diesel engine （R175）, particle filter （O90 mm × 150 mm） and ozone generator （CF- G10）. The results indicate that the diesel particulate trap could be regenerated effectively at 190℃. The DPF regeneration efficiency could be up to 90% by the regeneration gas come from DPF upstream side, but ozone penetrated when regeneration efficiency was about 65% , and the ozone utilization rate dropped. As the load lar- ger or the particulate traped time longer, the ozone penetrated earlier. Kept the ozone supply, as the flow of re- generation gas larger, the regeneration effect became more obvious. The ozone penetrated later by the regenera- tion gas coming from DPF downstream side, but after the ozone penetrated, the regeneration rate was so slowly that the DPF was hardly to be regenerated, the regeneration efficiency was lower than 70%. The results showed that it was feasible for the DPF offline regeneration by ozone oxidation, and the further study on improving the ozone utilization was needed.