W型火焰锅炉炉膛温度场的可视化试验研究

使用火焰辐射图像探测系统探测炉膛空间发射到镜头各像素的辐射能量，然后从能量传递和平衡的角度，由所得图像重建空间的温度场。在300MW机组W型火焰炉进行了炉膛二维断面温度场可视化重建试验。试验在炉膛壁面布置4个CCD火焰探测器，采用计算机图像采集处理技术获取炉膛火焰辐射图像，通过对火焰辐射图像的处理以厦相关算法，重建炉膛断面温度分布、可动态反映火焰断面温度水平、火焰中心的偏穆和火焰刷墙等燃烧异常工况。断面温度场可视化结果刷新一次的时间不超过5S，满足在线监测的要求。

Experimental Research on the Visualization of Temperature Fields in a Boiler Furnace with a W-shaped Flame

A flame radiation-image detection system is used to detect the radiation energy emitted from a furnace space to the various image elements of a lens.Then,from the standpoint of energy transmission and equilibrium a spatial temperature field is reconstructed from the obtained images.A visualization reconstruction test for a furnace two-dimensional sectional temperature field was conducted on the W-shaped flame furnace of a 300 MW unit.During the test 4 CCD(charge-coupled device) based flame detectors were installed on the furnace walls and furnace flame radiation images obtained by employing computer image acquisition and processing techniques.Through a processing of the flame radiation images and by using relevant algorithms a temperature distribution of the furnace section was reconstructed.It is possible to dynamically reflect the temperature level of the flame section and also abnormal combustion conditions,such as the deviation of a flame center,a flame brushing past a water wall,etc.The time needed for updating the visualization results of furnace-section temperature field will not exceed 5 seconds,thus adequately meeting the requirements of real-time monitoring.