红外测温系统在660MW电厂锅炉应用研究

Application Study of Infrared Temperature Measuring System in 660MW Power Plant Boiler

为解决直接测量电厂锅炉炉膛燃烧层温度困难的问题,开发了炉膛层温红外测温系统,并在国内某660MW超临界机组电厂锅炉上安装并运行。采用该系统可以直接、快速、连续地测量炉膛各燃烧层实时温度,实现了炉膛燃烧状态监测点的前移。基于炉膛各燃烧层温度数据,开展机组超低负荷燃烧适应性测试,最低负荷达到127MW,达到了额定负荷的19. 2%,与未采用该系统的同类电厂相比,每年节省燃油量约60%。

In order to solve the difficult problem of directly measuring the temperature of each combus- tion layer in the boiler furnace of power plant, the infrared temperature measuring system of furnace layer temperature has been developed and installed and operated in a domestic 660 MW supercritical unit boil- er. With this system, the real-time temperature of each combustion layer in the furnace can be measured directly, quickly and continuously, and the forward movement of the monitoring point of the furnace com- bustion state can be realized. Based on the temperature data of various combustion layers in the furnace, the adaptability of ultra-low load combustion of the unitis tested,and the minimum load reaches 127 MW, which is 19.2% of the rated load. It saves about 60 percent of the fuel each year, compared to similar power plants without the proposed system.