本文利用 8只火焰图像探测器和相应的计算机图像采集处理系统,在一台 200 MW 四角切圆燃煤锅炉上进行了炉膛三维温度场可视化实验研究。现场实验结果表明,炉膛上部温度分布较低,并且呈典型的单峰形状;燃烧器区域的温度分布较高,能够反应四角切圆燃烧特性。用水冷枪抽气热电偶对温度场可视化结果进行了检验,相对误差在5％之内。三维温度场可视化结果刷新一次的时间不超过5秒,满足在线监测的要求。 In this paper, we use 8 flame image detectors and the corresponding computer image acquisition and processing system to carry out the visualization experiment of 3-D temperature field in a 200 MW tangentially fired boiler. The experimental results show that the temperature distribution in the upper part of the furnace is low and has a typical single peak shape. The temperature distribution in the burner area is high, which can reflect the tangential combustion characteristics at the corners. Water cooled gun exhaust thermocouple temperature field visualization results were tested, the relative error within 5%. Three-dimensional temperature field visualization results refresh time of no more than 5 seconds to meet the online monitoring requirements.