Effects of the secondary oxygen injection on the performance of a staged-entrained flow caol gasifier

摘要：

In a staged entrained flow coal-slurry gasifier,the secondary oxygen was injected into the gasifier in order to protect the refractory in the dome region,to improve the mixing process as well as gasification performance.Based on a proposed 3-D numerical model,simulations were conducted for the staged gasifier at different mass flow rates of the secondary oxidizer.The characteristics of the gasification flames were analyzed as well as the influence of the secondary flow on the flow field of the staged gasifier.As the mass flow rate of the secondary oxidizer decreases,the secondary gasification flame curves up according to the backflow region and wall temperature increases.When the mass flow rate of the secondary oxidizer is less than 10％ of the total oxidizer mass flow rate,there is an obvious change of the turbulent mixing in the staged gasifier.

关键词： Numerical Simulation Staged Entrained Flow Coal Gasifier the secondary oxidizer coal gasification flame

作者: Cai Chunrong WU Yuxin ZHANG Jiansheng YUE Guangxi L(U) Junfu Zhang Hai

作者单位: Key laboratory for Thermal Science and Power Engineering of inistry of Education,Department of Therm Key laboratory for Thermal Science and Power Engineering of Ministry of Education,Department of Ther Key laboratory for Thermal Science and Power Engineering of Ministry of ducation,Department of Therm Key laboratory for Thermal Science and Power ngineering of Ministry of Education,Department of Therm

会议类型: 国际会议

会议名称: The 7th International Symposium on Coal Combustion(第七届国际煤燃烧学术会议)

会议地点: 哈尔滨

会议语种:英文

页码: 495-498

在线出版日期: 2011-07-19（万方平台首次上网日期，不代表论文的发表时间）