采用分布参数的控制循环锅炉水循环系统模型研究  

STUDY ON WATER CIRCULATION SYSTEM MODEL FOR CONTROLLED CIRCULATION BOILER BY USING DISTRIBUTED PARAMETERS

作　　者：李斌[1] 杨冬[1] 陈听宽[1] 

机构地区：[1]西安交通大学,陕西西安710049

出　　处：《热力发电》2005年第7期15-18,共4页Thermal Power Generation

摘　　要：建立了分布参数的控制循环锅炉水循环系统的非线性动态数学模型。水冷壁采用与时间和空间有关的分布参数模型,汽包和下降管采用集总参数模型,可以模拟在空间上的水冷壁受热不均及分布参数的动态特性。模型由质量、能量、动量守恒方程导出,并根据锅炉的实际结构尺寸计算,既可以用于锅炉制造厂分析锅炉的起动过程进行优化设计,也可以用于锅炉动态特性的研究。对一台控制循环锅炉在典型扰动工况下的扰动试验表明,该模型可以正确地反映锅炉的动态特性。A non-linear dynamic mathematic model for water circulation system of controlled circulation boiler has been established by using distributed parameters. For the water-wall, a model with distributed parameters correlated with time and space is adopted; for drum and downcomer, a model with lumped parameters being adopted. The non-uniform heating of the water-wall in respect of space, and dynamic behavior of the distributed parameters can be simulated by using the said model. The model was derived from conservation of mass, energy, and momentum, and calculated on the basis of real construction size of the boiler. The said model not only can be used for analysing the start-up process in the boiler manufacturing factory, but also can be used for studying dynamic behavior of the boiler. A disturbance test under typical disturbance condition of one controlled circulation boiler shows that the said model can correctly express dynamic behavior of the boiler.

关 键 词：控制循环锅炉 水循环系统 分布参数模型 动态特性 汽包 下降管 水冷壁 

分 类 号：TK224[动力工程及工程热物理—动力机械及工程] TM621.2[电气工程—电力系统及自动化]