| DOC辅助DPF再生的二次污染研究 |
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| 引用本文： | 张德满,马士虎,王晓东,汪正清,李伟,鲍晓峰,李凯.DOC辅助DPF再生的二次污染研究[J].车用发动机,2012(4):39-42. |
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| 作者姓名： | 张德满 马士虎 王晓东 汪正清 李伟 鲍晓峰 李凯 |
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| 作者单位： | 武汉第二船舶设计研究所;中国环境科学研究院 |
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| 基金项目： | 国家“八六三”高科技项目“机动车尾气后处理装置评价技术研究”(2006AA060302) |
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| 摘 要： | 在氧化型催化转换器(DOC)前端的排气管中喷入柴油,通过提高柴油机尾气温度、燃烧并去除柴油机微粒捕集器(DPF)中的PM,实现了DPF再生。对整个再生过程中尾气成分进行分析和计算,发现碳氢化合物(HC)为主要二次污染物,且排放相对较大。通过试验方法,分别研究喷油流量和喷油时DOC前端排气温度对再生过程中HC排放的影响,并依此提出保温处理、分阶段喷油和低速再生等三项优化措施。优化后再生过程中HC排放降低了68%,且燃油经济性提高了21%。
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| 关 键 词： | 柴油机 微粒捕集器 再生 二次污染 碳氢化合物 |
Study on Secondary Pollution of DPF Regeneration Assisted with DOC |
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| ZHANG De-man,MA Shi-hu,WANG Xiao-dong,WANG Zheng-qing,LI Wei,BAO Xiao-feng,LI Kai.Study on Secondary Pollution of DPF Regeneration Assisted with DOC[J].Vehicle Engine,2012(4):39-42. |
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| Authors: | ZHANG De-man MA Shi-hu WANG Xiao-dong WANG Zheng-qing LI Wei BAO Xiao-feng LI Kai |
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| Institution: | 1.Wuhan Second Ship Design and Research Institute,Wuhan 430064,China; 2.Chinese Research Academy of Environment Sciences,Beijing 100012,China) |
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| Abstract: | Injecting diesel into exhaust pipe before the oxidation catalytic converter(DOC),the exhaust temperature increased,then the particulate matter(PM) could be burned and removed from diesel particulate filter(DPF),and so DPF regeneration realized.The gas composition of whole regeneration process was analyzed and calculated,and hydrocarbon(HC) was found to be the main secondary pollutant and the emission was relatively large.Through the test method,the influences of fuel injection quantity and exhaust temperature before DOC with injection on HC emission in regeneration process were studied respectively and three optimized methods comprised thermal insulation,phased injection and low-speed regeneration were propounded.After the optimization,the HC emission reduced by 68% and the fuel economy improved by 21%. |
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| Keywords: | diesel engine diesel particulate filter regeneration secondary pollution hydrocarbon |
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