链条锅炉的动态建模与仿真

The Dynamic Modeling and Simulation of a Chain Grate Boiler

针对10 t/h及以下容量链条锅炉负荷的频繁波动,采用模块化的建模方式建立了一台10 t/h链条锅炉的汽水系统和燃烧系统的动态数学模型,并进行了仿真试验,得到炉排速度和空气量发生变化时锅炉燃烧率、蒸汽流量、过热汽温和汽包水位的实时变化量和趋势。仿真试验结果表明,链条锅炉更好地实现负荷调整应采取同时改变炉排速度和空气量的方式,为实现锅炉的稳定性和经济性运行提供理论指导。

In consideration of the very frequent load fluctuations of chain grate boilers with a steam capacity of 10 t/h and lower a dynamic mathematical model was set up by using a modular modeling method for the steam-water system and combustion system of a 10 t/h chain grate boiler.Through simulation tests obtained were the real-time variation quantity and trend for the boiler combustion rate,steam flow rate,superheated steam temperature and boiler drum water level,all during the changes in chain-grate traveling speed and air feeding rate.The results of the simulation tests indicate that to better implement boiler load adjustments it is necessary to simultaneously change the chain-grate traveling speed and airflow rate.This and other findings can serve as a theoretical guide for the stable and economic operation of chain grate boilers.