多喷嘴撞击火焰高度及频率特性  

Characteristic of Multi-Burner Impinging Flame Height and Frequency

作　　者：郭庆华[1] 龚岩[1] 范普兴[1] 周志杰[1] 于广锁[1] 

机构地区：[1]华东理工大学煤气化及能源化工教育部重点试验室,上海200237

出　　处：《燃烧科学与技术》2013年第4期352-358,共7页Journal of Combustion Science and Technology

基　　金：国家重点基础研究发展计划(973计划)资助项目(2010CB227004);国家自然科学基金资助项目(21006026);中央高校基本科研业务费专项资金资助

摘　　要：基于多喷嘴对置式水煤浆气化试验平台,利用高温内窥镜配合使用高速相机,结合火焰图像处理技术,研究了多喷嘴对置式气化炉内水煤浆撞击火焰高度及其脉动频率特征,选用的图像处理方法可实现撞击火焰高度区域图像的有效分割.结果表明,撞击火焰的平均火焰高度和最大火焰高度均随氧碳比的增大不断上升,且撞击火焰稳定性增强.撞击火焰特征频率随着氧碳比的升高而降低,主要频率特征峰的幅值降低,脉动特征频率在1～3Hz处趋于稳定.在水煤浆操作的典型氧碳比条件下,撞击火焰将不会直接冲蚀到拱顶耐火砖.Based on the bench-scale opposed multi-burner （OMB） gasifier, impinging flame height and flame pulsa- tion frequency were investigated by high temperature endoscope combined with industrial high speed camera and flame image processing technology which could effectively distinguish flame region from refractory wall in height. The results show that the average and maximum impinging flame height is increased and the impinging flame stability are improved with the increase of O/C atom ratio. In the laboratory operation conditions, with the increase of O/C atom ratio, the characteristic value of impinging flame pulsation frequency is stabilized between 1--3 Hz, and the amplitude of the characteristic peaks of the main frequency is reduced. At typical operating O/C atom ratios, the im- pinging flame height in a gasifier will not directly erose dome firebrick.

关 键 词：水煤浆 多喷嘴对置 撞击火焰高度 火焰脉动频率 

分 类 号：O643.2[理学—物理化学]