Experimental study on CH* chemiluminescence characteristics of impinging flames in an opposed multi‐burner gasifier
Experimental study on CH* chemiluminescence characteristics of impinging flames in an opposed multi‐burner gasifier
复制标题
DOI：
10.1002/aic.15555
复制
发表时间：
2017-06
期刊：
影响因子：
3.7
通讯作者：
Qing Zhang;Yan Gong;Q. Guo;Xudong Song;G. Yu
中科院分区：
文献类型：
--
作者：
Qing Zhang;Yan Gong;Q. Guo;Xudong Song;G. Yu
利用CCD摄像机和高温内窥镜对多喷嘴对置式气化炉内的撞击火焰进行了带通滤波成像。通过使用三个带通滤波器的滤波和图像处理方法被施加到减去烟尘和CO2* 的贡献在CH* 波段，并获得CH* 的碰撞火焰的化学发光。结果表明，四喷嘴撞击火焰在撞击区形成了清晰的反应核。反应核的大小受O/C当量比（[O/C]e）的影响，当[O/C]e较低时，撞击效应相对较强。气化炉中的火焰升离长度由合成气浓度和柴油雾化效果共同控制。撞击效应缩短了火焰的离地长度。合成气浓度与最大CH* 强度之间的关系使得可以从CH* 强度评估合成气浓度。本文受版权保护。All rights reserved.
The bandpass filtered images of impinging flames in an opposed multi-burner (OMB) gasifier was visualized by a CCD camera combined with a high temperature endoscope. A filtering and image processing method by use of three bandpass filters was applied to subtract soot and CO2* contributions in the CH* band and obtain the CH* chemiluminescence of impinging flames. The results show that a clear reaction core is generated in the impinging zone of four-burner impinging flames. The size of the reaction core is affected by the O/C equivalence ratio ([O/C]e) and the impingement effect is relatively stronger at lower [O/C]e. The flame lift-off length in the gasifier is jointly controlled by the syngas concentration and the diesel atomization effect. The impingement effect shortens the flame lift-off length. The relationship between the syngas concentration and the maximum CH* intensity makes it possible to evaluate the syngas concentration from CH* intensity. This article is protected by copyright. All rights reserved.