| O_2/CO_2气氛下煤种对燃煤PM_(2.5)形成的影响 |
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| 引用本文： | 屈成锐,赵长遂,周骛,段伦博.O_2/CO_2气氛下煤种对燃煤PM_(2.5)形成的影响[J].中国电机工程学报,2011(2). |
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| 作者姓名： | 屈成锐 赵长遂 周骛 段伦博 |
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| 作者单位： | 东南大学热能工程研究所; |
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| 基金项目： | 国家重点基础研究发展计划项目(973项目)(2006CB705806)~~ |
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| 摘 要： | 采用管式炉和荷电低压撞击器(electrical low pressure-impactor,ELPI)研究了4种煤粉在O2/CO2条件下燃烧后生成的PM2.5排放特性,并对空气和O2/CO2气氛下PM2.5的排放特性进行了比较。结果表明:不同煤粉在O2/CO2气氛下燃烧后,所产生的PM2.5质量浓度均呈双峰分布,峰值分别在0.1和2μm左右;S在亚微米颗粒上明显富集,而在超微米颗粒上含量相对较少;K和Na在亚微米颗粒上含量比在超微米颗粒上高一些;Si和Ca在亚微米颗粒上含量相对较少,而在超微米颗粒上含量相对较多;Fe在亚微米和超微米颗粒上含量相当。分析认为,不同煤粉中组分形式和含量的不同,影响了煤粉燃烧后PM2.5形成的过程,造成PM2.5排放特性的不同。从PM2.5的粒径分布、元素分布和形貌分析可知,和空气气氛相比,O2/CO2气氛不影响PM2.5的生成机制,但影响其粒径分布。
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| 关 键 词： | O2/CO2 煤燃烧 PM2.5 形成机制 煤种 |
Effect of Coal Type on PM_(2.5) Formation in O_2/CO_2 Atmosphere |
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| QU Chengrui,ZHAO Changsui,ZHOU Wu,DUAN Lunbo.Effect of Coal Type on PM_(2.5) Formation in O_2/CO_2 Atmosphere[J].Proceedings of the CSEE,2011(2). |
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| Authors: | QU Chengrui ZHAO Changsui ZHOU Wu DUAN Lunbo |
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| Affiliation: | QU Chengrui,ZHAO Changsui,ZHOU Wu,DUAN Lunbo(Thermoenergy Engineering Research Institute,Southeast University,Nanjing 210096,Jiangsu Province,China) |
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| Abstract: | Four different pulverized coals were burned in a tube furnace under O2/CO2 atmosphere and electrical low pressure-impactor(ELPI)was used to collect the PM2.5 for investigating the emission features of PM2.5.The comparison of PM2.5 emission characteristics was made between O2/CO2 combustion and air combustion.It is shown that a similar bimodal distribution of PM2.5 appeared.The small and large modes were located at 0.1 mm and 2 mm,respectively.S was enriched in submicron-size PM,but its contents were small i... |
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| Keywords: | O2/CO2 coal combustion PM2 5 formation mechanism coal type |
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