摘要
本文在分析传统煤粉炉水煤比控制的基础上,针对超临界循环流化床锅炉具有很大的燃烧惯性和床料热惯性的特性,提出了利用风量、氧量构造热量信号,并将构造的热量信号引入给水系统中,作为给水流量指令的前馈信号,再用中间点温度或焓值修正作为给水流量指令。热量信号的引入克服了循环流化床锅炉由于床料热惯性、燃烧惯性、给煤量内部扰动和煤质变化对给水控制的不利影响。设计的水煤比控制系统不仅适用于循环流化床锅炉,同时也适用于煤粉炉。
Heat release signal constructed by air flow and oxy- gen content was proposed to improve water-coal rate control in supercritical circulating fluidized boiler where fuel inertia and bed material heat inertia was severe. Different from the traditional method, heat release signal was used as feedforward signal of feed water setpoint. Then the feedwater setpoint was revised by intermediate point temperature or enthalpy. The introduction of heat release signal lowers the passive influence of bed material heat inertia, fuel inertia, feed fuel disturbance and coal quality changes on feed water control. The water-coal rate control can be applied to circulating fluidized boiler as well as pulverized coal boiler.
出处
《山东电力高等专科学校学报》
2012年第4期42-45,共4页
Journal of Shandong Electric Power College
关键词
循环流化床锅炉
水煤比控制
circulating fluidized boiler
water carbon ratio control
