Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Journal of Shanghai Jiaotong University》 2013-09
Add to Favorite Get Latest Update

Mathematical Model of Pulverized Coal Ignition and Combustion Considering Various Pyrolysis Products

QI Yong-feng;ZHANG Ming-chuan;YU Juan;School of Energy and Power Engineering,Yangzhou University;Institute of Thermal Energy Engineering,Shanghai Jiaotong University;  
The transient whole-coupling model in a spherical coordinate system on single pulverized coal pyrolysis and combustion was developed,taking into consideration various pyrolysis product release,heat transfer,mass transfer,and chemical reactions.The igntion and combustion characteristics of Shenmu bituminous coal were simulated.The result shows that the ignition of pulverized coal begins from volatiles,and the volatile flame can move rapidly to a position departing from the center of the coal particle by about29 times radius,due to the limitation of oxygen diffusion;when the coal pyrolysis is completed,the CO generated by surface oxidation reaction has been ignited,the flame returns almost to the coke particle surface,the particle temperature rises abruptly,and the coke combustion is controlled by the surface oxidation reaction;with the combustion rate increasing,the coke combustion begins to be controlled by the surface reducing reaction,and the char flame departs from the particle surface again.
【Fund】: 国家自然科学基金项目(51106133);; 江苏省自然科学基金项目(BK2010314);; 江苏省高校自然科学研究面上项目(10KJB470010 12KJB510032)资助
【CateGory Index】: TK16
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved