ANALYSIS OF INDIVIDUAL PM1 FROM PULVERIZED-COAL COMBUSTION

摘要：

Submicron particles (PM1) generated from a pilot-scale 25 kW down-fired combustor was extensively investigated by using a nitrogen-aspirated, water-cooling isokinetic probe with two-stage dilution. A 13-stage Electric Low Pressure Impactor (ELPI) was used to deposit particles, among which the last eight stages (PM1) are selected for the further analysis by the individual particles analytical technology. As a complement of the bulk analysis, the results of individual particles analysis provided the constituents, morphology and nanostructure of particles. The results show the toxicity of the PM1 and the different formation mechanisms distinguished by the size of 407 nm, the ultrafine particle mode which formation process is significantly affected by the combustion conditions and flue gas cooling rate, while the intermediate mode is controlled by the shedding of molten and coagulated ash particles from the burning char surface.

关键词： pulverized-coal combustion analysis of individual PM1

作者: Jiankun ZHUO Shui-qing LI Qiang SONG Qiang YAO

作者单位: Key Laboratory of Thermal Science and Power Engineering, Department of Thermal Engineering, Tsinghua University, Beijing 100084, China

会议类型: 国际会议

会议名称: 第六届煤燃烧国际会议(The 6th International Symposium on Coal Combustion)

会议地点: 武汉

会议语种:英文

页码: 837-842

在线出版日期: 2007-12-01（万方平台首次上网日期，不代表论文的发表时间）