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本文应用CSE仿真平台的JTopmeret模块建立了某600 MW超临界锅炉对流受热面模型,通过嵌入自定义模块建立了锅炉辐射受热面、空气预热器等模型,实现对整个锅炉热力系统建模。通过对模型的校核,验证了模型的准确性,在此基础上仿真研究了锅炉热力系统变工况特性。仿真结果显示,随着负荷降低锅炉各受热面出口烟温均逐渐降低,对流受热面的吸热量减小、辐射受热面的吸热量增大;锅炉效率随负荷降低先略微增大后逐渐减小,且在90%负荷时最高。
In this paper, the convection heating surface model of a 600 MW supercritical boiler is established by using the JTopmeret module of the CSE simulation platform. By embedding custom modules, a model of the heating system of the boiler and the air preheater is established to model the entire boiler heating system. Through the verification of the model, the accuracy of the model is verified. On this basis, the simulation of the variable behavior of the boiler thermal system is carried out. The simulation results show that as the load decreases, the smoke temperature at the outlet of each heating surface of the boiler gradually decreases, the heat absorption of the convection heating surface decreases, and the heat absorption of the radiant heating surface increases. The efficiency of the boiler increases slightly as the load decreases Decreases, and is highest at 90% load.