Effect of Oxygen-enriched Condition on Ignition Favorable Region in High-temperature Oxygen-enriched Pulverized Coal Ignition
On the basis of characteristics of high-temperature air oil-free ignition and oxygen-enriched combustion,high-temperature oxygen-enriched ignition was proposed as a new method of pulverized coal ignition for utility boilers,and a device for hightemperature oxygen-enriched ignition was also designed.In order to obtain the law of the effect of oxygen-enriched conditions on pulverized coal ignition in high-temperature oxygen-enriched ignition,the ignition temperatures of design coal for ignition device were obtained in different oxygen concentration conditions by related experiments,and the ignition favorable region was defined.Finally,the effect of oxygen-enriched conditions on the ignition favorable region was obtained by numerical simulation using FLUENT.The results show: temperatures and oxygen concentration of oxygen-enriched gas are two basic factors that affect the size of the ignition favorable region;no larger ignition favorable region appears when the temperature or oxygen concentration is lower;considering the appearance of larger ignition favorable region,the lowest temperature of oxygen-enriched gas decreases with the increase of oxygen concentration;when oxygen concentration is higher than 60％,the temperature of oxygen-enriched gas is the major factor to the size of the ignition favorable region,on the contrary,the oxygen concentration of oxygen-enriched gas becomes the major factor.
high-temperature oxygen-enriched pulverized coal ignition oxygen-enriched condition ignition temperature ignition favorable region oxygen concentration
LIU Guo-wei ZHANG Yan DONG Peng BIE Ru-shan
College of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,Heilongjiang Province,China
国际会议
The 7th International Symposium on Coal Combustion(第七届国际煤燃烧学术会议)
哈尔滨
英文
694-697
2011-07-19（万方平台首次上网日期，不代表论文的发表时间）