李鉴松,孟忠伟,陈超,苗垒.再生温度和来流参数对柴油机颗粒过滤器再生和过滤特性影响的试验研究[J].内燃机工程,2020,41(4):27-38.
再生温度和来流参数对柴油机颗粒过滤器再生和过滤特性影响的试验研究
Experimental Study on the Effect of Regeneration Temperature and Input Exhaust Parameters on the Regeneration and Filtration Characteristics of a Diesel Particulate Filter
DOI：10.13949/j.cnki.nrjgc.2020.04.004
关键词:柴油机颗粒过滤器  来流流量  再生温度  颗粒物排放
Key Words:diesel particulate filter（DPF）  flow rate  regeneration temperature  particle emission
基金项目:国家重点研发计划项目（2016YFD0700702）；国家自然科学基金项目（51676167）
作者单位
李鉴松,孟忠伟,陈超,苗垒 1.南充职业技术学院 机电工程系，南充 637131；2.西华大学 汽车与交通学院，成都 610039；3.无锡威孚力达催化净化器有限责任公司，无锡 214177 
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摘要:基于外加热源再生性能测试台架，研究了不同再生温度和不同来流流量对柴油机颗粒过滤器（diesel particulate filter， DPF）出口颗粒排放的影响。试验结果表明：加载量为2.5g/L时，DPF出口颗粒物出现一个颗粒数浓度波峰；加载量为5.0g/L时，DPF出口颗粒物出现两个数量浓度波峰。相同来流流量下，再生效率和总质量浓度随着再生温度的增加而增加；升温阶段出口颗粒物以核模态为主；再生阶段时，内部出现温度波峰且出口颗粒物以50nm以上聚集态颗粒为主。相同再生温度下，加载量为2.5g/L时再生效率和总质量浓度随着来流流量的增加而增加，升温和再生阶段出口颗粒物均以核模态为主；加载量为5.0g/L时再生效率和总质量浓度随来流流量的增加呈现先增加后减少的趋势，升温阶段出口颗粒物以核模态为主，再生阶段在大流量时有部分聚集态颗粒物排出。
Abstract:The effect of different regeneration temperature and input exhaust flow rate on particulate emissions from a diesel particulate filter(DPF) were studied using an externally heated regeneration performance test bench. The test results showed that when the amount of particle loaded for the bench test was 2.5g/L, the number of particle concentration at the DPF outlet appeared one peak, and when the particle loading was 5.0g/L, two peaks appeared. At the same input exhaust flow rate, the regeneration efficiency and the total particle mass concentration increased with the rise of regeneration temperature. At this time, the outlet particles at the heating stage were mainly in the nucleation mode, and during the regeneration stage, a temperature peak appeared in the DPF, and the particles from the DPF outlet were mainly in the accumulation mode with a diameter of 50nm or more. At the same regeneration temperature, when the particle loading was 2.5g/L, the regeneration efficiency and the total particle mass concentration increased with the rise of input exhaust flow rate. At this time, the outlet particles at the heating and regeneration stages were mainly in the nucleation mode. When the particle loading was 5.0g/L, the regeneration efficiency and the total particle mass concentration tended to increase first and then decrease as the input exhaust flow rate increased. At this time, the outlet particles at the heating stage were mainly in the nucleation mode, while at the regeneration stage, some accumulative particles were discharged at high exhaust flow rate.
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