微米木纤维DPF冷却器结构设计与试验  

Design and experimental study on the structure of the DPF cooler of micron wood fiber

作　　者：杜丹丰[1] 郭秀荣[1] 亓占丰[1] 刘跃雄[1] 

机构地区：[1]东北林业大学,黑龙江哈尔滨150040

出　　处：《中山大学学报（自然科学版）》2018年第1期143-149,共7页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金(31470611;51378096);黑龙江省自然科学基金(E2015055)

摘　　要：尾气微粒捕集器技术是目前净化柴油机尾气颗粒物最有效的后处理技术之一。微米木纤维作为捕集器滤芯材料,具有过滤效率高、排气背压小和容尘量多等优点,但不能长时间承受尾气300~400℃的高温,需结合冷却装置使用。本研究分析了风冷却器基管内径、管间距、翅片高度和翅片间距对冷却性能的影响;设计了与Lister Petter AA1柴油机相匹配的管翅式冷却器,并搭建了冷却器性能试验台进行实验验证。结果表明,该管翅式冷却器具有良好的冷却效果,在试验工况下能将尾气温度冷却至木纤维滤芯可耐受的220℃以下,同时冷却器的压降也保持在14 k Pa以内。Diesel particulate filter （DPF） is one of the most effective techniques for the purification of diesel particulate matter （PM）. With micro wood fiber as DPF filter material, it has the advantages of high filtration efficiency, low exhaust back pressure and large dust content, but it can not continuous operate under high temperature of 300-400 ℃ and must work with cooling device. In this paper, based on the air cooling design calculation model, the influence of inner diameter, pipe distance, fin height and fin distance on the cooling performance is analyzed to design the tube fin type cooler, which is appropriate to the Lister Petter AA1 diesel engine. Furthermore, the efficiency of the cooling design has been proved by the cooling performance test set up in this research. The results show that the fin tube cooler has good cooling efficiency that the temperature of the exhaust gas can be decreased 220 ℃ and lower）,while the cooler pressure drop is always below 14 kPa.

关 键 词：微米木纤维 柴油机 微粒捕集器 冷却器 

分 类 号：S781[农业科学—木材科学与技术] TS642[农业科学—林学]