Experimental study on the Thermal Regeneration Process of DPF

摘要

Based on the regeneration testing bench with additional heating sources, the thermal regeneration process of DPF and ignition point were investigated. The results show that: in the process of thermal regeneration, the regeneration heat mainly tends to accumulated at the rear central of DPF, which leaded to generate a hot zone, and the heat transfer from rear to front of DPF, gradually expanding the hot zone area and promoted particle regeneration. With the increase of carbon black load, the maximum wall temperature and regeneration efficiency gradually increased first and the gradually stabilized. There are two ignition modes during regeneration: uniform combustion at low carbon loading and multi-point combustion at high carbon load. The number of ignition points shows a similar parabolic trend with the increase of carbon load. With the increase of ash load, the maximum wall temperature and regeneration efficiency gradually increased, while the ignition modes were all multi-point ignition, and the number of ignition points remained unchanged with the increase of ash load.