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基于对气化火焰结构特征的假设,以Planck辐射定律和计算机层析成像技术为理论基础,建立了一种采用普通面阵CCD测量气化火焰截面温度场的方法。火焰监测系统安装在气化炉顶部以拍摄炉膛火焰。结果表明,四喷嘴撞击火焰较为规则,四股火焰相互抑制,撞击火焰集中在炉膛中心。重建出的火焰温度分布与气化火焰结构很吻合,且呈现为十字型结构,中心温度高,边缘温度低。火焰中心截面温度场的主体范围为1700~2050℃。计算温度与测量温度的相对误差小于±6.4%,符合工程应用的要求。
Based on the hypothesis of the structural characteristics of gasification flames and based on the Planck radiation law and computer tomography, a method of measuring the temperature field of the gasification flame cross section with a conventional area array CCD is established. Flame monitoring system installed in the top of the gasifier to shoot the furnace flame. The results show that the four nozzles collide with the flame is more regular, four flame mutual inhibition, the impact of the flame concentrated in the center of the furnace. Reconstruction of the flame temperature distribution and gasification flame structure is very consistent, and presented as a cross-shaped structure, the center temperature is high, the edge temperature is low. Flame center section temperature field of the main range of 1700 ~ 2050 ℃. The relative error between calculated temperature and measured temperature is less than ± 6.4%, which meets the requirements of engineering application.