引入辐射能信号的锅炉氧量寻优控制研究

火电厂炉内燃烧检测的手段和方法,受制于炉内强烈的燃烧行为。从炉膛燃烧中提取的炉膛辐射能信号能快速地反映入炉燃料量的瞬态变化,也可准确地判断因燃料品质突变造成的燃烧率改变。引入炉膛辐射能信号参与的氧量寻优控制策略,改变了传统的炉膛燃烧调控特性,提高了参数的控制品质。通过在沙角A电厂300MW燃煤机组上的实际运行表明,优化后的氧量值能将辐射能维持在高位水平上,并且准确响应炉内燃烧状况,经济效率和社会效益明显,所提出氧量寻优控制方案有效、可行,具有产业化意义。

Study on Introducing Radiant Energy Signal for Optimized Oxygen Control in Furnace

Test method of combustion is strongly restricted by combustion behavior in coal-fired power plant boiler furnace The alternation of coal quality or quantity can be detected transiently,and the change of burning rate can also be judged by radiant energy signal.Traditional combustion control strategy has been meliorated by inducing radiant energy signal(E)into oxygen control circuit.Through modification and in-situ operation on a 300MW unit of Shajiao A power plant, the control property under the optimized air/coal ratio can always hold the E in high-level and response combustion condition correctly,the new industrial scheme is proved to be practical and economical.