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基于图像处理的温度检测信息,对超临界W型直流锅炉蒸发系统进行分布参数建模。建立的模型同时考虑了炉内热负荷分布和锅内工质物性分布的不均匀性,以预测对应工况下的壁面热流分布和壁温分布。仿真结果表明各热力参数在水冷壁上呈现明显的分布参数特性,并且其分布特性随着工况的变化而变化。发现W型火焰锅炉前墙存在3个高热流区,左墙最高壁温为459.85℃,且最大壁面温差为94℃。同时,数值计算结果与现场实测值进行了对比,理论推算与电厂实际运行结果相一致。模型既可用于在线预测,也可用于离线分析计算,对超临界W型锅炉的研究有一定的指导意义。
Based on the image processing temperature detection information, the distribution parameters of the evaporation system of the supercritical W boiler were modeled. The established model also considers the distribution of heat load in the furnace and the heterogeneity of the physical properties of the working fluid in the boiler to predict the wall heat flow distribution and the wall temperature distribution under the corresponding operating conditions. The simulation results show that the thermal parameters show obvious distribution parameters on the water wall, and their distribution characteristics change with the working conditions. It is found that there are three high heat flux zones in the front wall of the W flame boiler. The maximum wall temperature of the left wall is 459.85 ℃ and the maximum wall temperature difference is 94 ℃. At the same time, the numerical calculation results are compared with the field measurements, and the theoretical calculation is consistent with the actual operation results of the power plant. The model can be used for both on-line prediction and off-line analysis and calculation, which is of guiding significance for the research of supercritical W boiler.