建立一种基于可见光辐射测温方法的炉膛断面温度场在线监测系统。在锅炉最上层燃烧器之上的某一断面安装4个炉膛火焰探测器,通过对火焰辐射图像的处理,计算出该断面的温度分布。系统能在1s之内完成温度场的计算、显示、数据存储等多项功能。系统经过黑体炉标定,有较高的测量精度。在两台300MW四角切圆煤粉炉上的检测结果表明,锅炉最上层燃烧器以上7m的炉膛断面温度分布呈单峰分布,在炉膛四角存在低温区,与锅炉运行特征相符合,与热电偶的检测结果相比误差小于4%。 A temperature monitoring system based on visible light radiation is established. Four burner hearth flame detectors were installed on a section above the uppermost burner of the boiler, and the temperature distribution of the section was calculated by processing the flame radiation image. System can be completed within 1s temperature field calculation, display, data storage and many other features. System through the blackbody furnace calibration, a higher measurement accuracy. The test results on two 300MW tangentially pulverized coal fired furnaces show that the temperature distribution of the furnace section above the uppermost burner of the boiler shows a unimodal distribution with low temperature zones in the four corners of the furnace, which are in accordance with the operating characteristics of the boiler, The test results compared to less than 4% error.