应用插值滤波反投影快速重建300MW电站锅炉准三维温度场

300MW BOILER QUASI-THREE-DIMENSIONAL TEMPERATURE FIELD FAST RECONSTRUCTION BASED ON INTERPOLATED FILTER BACK PROJECTION METHOD

基于辐射传递模型和投影重建技术的图像法温度场测量为研究电站锅炉燃烧工况的变化,进行燃烧诊断提供了新的手段。针对现有温度场重建算法无法满足实时在线监测的要求,提出了基于二元矩形插值公式的滤波反投影重建算法,通过对火焰图像中获取的投影数据进行插值后滤波反投度分布切片,校正后的比色法测温公式被用来计算断面内各点的温度值,最后通过 OpenGL 技术将各断面的温度显示在三维坐标中。该算法降低了温度场重建的时间复杂度,从现场 300WM 电站锅炉的实际测试,达到了现场在线监测的要求。

D temperature field determination of pulverized boiler based on radiative propagation and projection reconstruction model provides a new technique for power plant combustion diagnosis. Filter back projection algorithm was provided to achieve on-line computing of radiative intensity distribution based on two-dimensional rectangle interpolation formula. The radiative intensity projection data got from spectrum-band-emendate flame image was interpolated for filtered back projection to compute intensity distribution, and emendated colorimetry method was used to calculate temperature value in each grid. Finally OpenGL technique was used to demonstrate the three-dimensional temperature field. The 300WMe power plant in-situ experiment results showed this algorithm achieved on-line combustion diagnostic monitor requirement.