Cold modeling experiment of wall tangential-firing combustion

被引：0
|
作者：
Chen J. [1 ]
Qin M. [1 ]
Kong C. [1 ]
Chen L. [1 ]
Wu S. [1 ]
机构：
[1] School of Energy Science and Engineering, Harbin Institute of Technology
来源：
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2010年 / 46卷 / 18期
关键词：
Modeling experiment; Three-dimensional particle dynamic analyzer(PDA); Ultra supercritical boiler; Wall tangential-firing;
D O I：
10.3901/JME.2010.18.162
中图分类号：
学科分类号：
摘要：
The type of wall tangential-firing combustion in supercritical and ultra supercritical technologies is adopted by some factories. To research the flow characteristics in the furnace and the influence of different operation parameters on the changes of flow field, cold experiment is conducted on the modeling test-bed of an ultra supercritical boiler adopting this type of combustion and a three-dimensional particle dynamic analyzer (PDA) is employed in this experiment for measurement of the characteristics of two-phase gas/particle flows in the burner area. The distribution of the gas/particle velocity and particle concentration of the primary air, as well as the velocity attenuation characteristics are obtained. The results show that, the tangential circle decreases with the increase of primary air ratio. Increasing primary air ratio is also helpful to showing the velocity attenuation. A high concentration region can be formed in the center of the furnace, which can lead to low-NOx combustion. Furthermore, the concentration in this region can increase slightly with the increase of primary air ratio. However, due to deflection of shooting flow, another higher concentration region can be formed beside the side wall. © 2010 Journal of Mechanical Engineering.
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页码：162 / 168
页数：6
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