440 t/h循环流化床锅炉整体动态模型及仿真

建立循环流化床锅炉的整体动态模型对循环流化床锅炉设计、生产优化、自动控制系统的开发研究等有至关重要的影响.本文在综合分析循环流化床锅炉床温和汽包压力的动态特性的基础上,采用集中参数化的方法,分别建立了燃烧系统模型和汽水系统模型;并通过炉膛传热量,将燃烧系统模型和汽水系统模型结合起来,从而建立了以给煤、一、二给风为输入变量的循环流化床锅炉的整体动态模型.并对所建立的模型方程进行仿真,结果分析证实了该模型的正确性.

Integral Dynamic Model and Simulation of the 440 t/h Circulating Fluidized Bed Boiler

Integral Dynamic Modeling of the Circulating Fluidized Bed Boiler(CFBB) is important for the unit design,online optimizationand development of control system.In this paper,the models of the combustion system and the steam-water system are proposed through lumped method,which are based on the analysis of dynamic characteristics of the bed temperature and drum-steam pressure of CFBB.Through the furnace heat transfer,both of the models are combined to obtain the integral dynamic model,which considered the coal feed,primary air and secondary air as inputs.And the result of the real-time simulation agrees with the actual data well.