循环流化床锅炉床温动态模型  

Dynamic model of bed temperature for circulating fluidized bed boilers

作　　者：高明明[1] 刘伟[1] 严国栋[1] 洪烽 

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206

出　　处：《热力发电》2018年第3期45-50,共6页Thermal Power Generation

基　　金：国家重点基础研究发展计划(973计划)项目(2016YFB0600205);中央高校基本科研业务费专项资金资助(2015ZZD15;2016MS28)~~

摘　　要：循环流化床(CFB)锅炉燃烧技术具有燃料成本低、适应性强、燃烧效率高等优点,但其燃烧模型变量多且关系复杂。床温作为CFB锅炉燃烧过程中特有的参数受多重因素的影响,难以控制。本文分析了CFB锅炉床温的影响因素,并通过机理分析其动态过程,建立了床温动态控制模型,其中CFB锅炉床温模型参数通过电厂试验和运行数据辨识得出。将该床温模型应用于某300 MW机组CFB锅炉,结果表明该床温模型具有很好的适应性,且模型辨识精确度较高,可用于实际工业电厂。The circulating fluidized bed （CFB） boiler has the advantages of low fuel cost, strong adaptability and high combustion efficiency, but its combustion model has multiple variables and complicated relationship. As the unique parameter during combustion process of CFB boiler, bed temperature is affected by several factors and it is difficult to control. To solve this problem, this paper analyzes the factors affecting the bed temperature and the dynamic process by mechanism analysis, and establishes the dynamic control model for bed temperature. The parameters of the model were identified by power plant experiments and operation data. Application of this bed temperature model in a 300 MW unit CFB boiler show that, this bed temperature model has good adaptability and high identification accuracy, which can be applied in the practical power plants.

关 键 词：CFB锅炉 床温控制 动态模型 机理分析 即燃碳 水冷壁 能量守恒 模型辨识 

分 类 号：TK39[动力工程及工程热物理—热能工程]