基于gCCS的330MW循环流化床锅炉燃烧系统动态建模

发布时间：2018-10-21 10:36

【摘要】：针对某330 MW循环流化床锅炉燃烧系统,利用机理分析法建立锅炉氧浓度、床料质量、残碳质量以及床温的动态数学模型。首先将循环流化床锅炉燃烧过程简化,建立燃烧系统动态数学模型,用gCCS(gPROMSCarbom Capture and Storage)软件求解仿真;并根据现场试验数据对模型进行动态验证。在此基础上,利用所建模型进行阶跃扰动仿真计算。仿真结果表明,给煤的增加会使密稀相区氧浓度下降,床温升高;一次风的增加使密稀相区氧浓度升高,密相区床温下降,而稀相区床温呈现先上升后下降的规律;二次风的增加使密稀相区床温下降,密相区氧浓度先上升后下降,而稀相区氧浓度增大。所得研究结论可为循环流化床锅炉运行、燃烧控制系统的设计和优化提供理论基础。
[Abstract]:Based on the combustion system of a 330 MW circulating fluidized bed boiler, a dynamic mathematical model of oxygen concentration, quality of bed material, residual carbon mass and bed temperature was established by mechanism analysis. Firstly, the combustion process of circulating fluidized bed boiler is simplified, the dynamic mathematical model of combustion system is established, the simulation is solved by gCCS (gPROMSCarbom Capture and Storage) software, and the model is dynamically verified according to the field test data. On this basis, the model is used to simulate the step disturbance. The simulation results show that the increase of coal feed will decrease the oxygen concentration and increase the bed temperature in the dense and dilute phase region, and the increase of primary air will increase the oxygen concentration in the dense and dilute phase region, and decrease the bed temperature in the dense phase zone, while the bed temperature in the dilute phase region will increase first and then decrease. With the increase of secondary wind, the bed temperature in the dense and dilute phase region decreases, the oxygen concentration in the dense phase region increases first and then decreases, and the oxygen concentration in the dilute phase region increases. The results can provide a theoretical basis for the design and optimization of circulating fluidized bed boiler operation and combustion control system.
【作者单位】：东南大学能源热转换及其过程测控教育部重点实验室能源与环境学院;
【基金】：国家自然科学基金(51306032) 江苏省自然科学基金(BK20130612)
【分类号】：TK229.66

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