超临界锅炉高温受热面屏间热偏差在线优化研究

以锅炉过热器、再热器热偏差计算方法为基础,采用全局寻优方法,根据当前的负荷、磨煤机组合、燃烧器摆角、各层配风方式、末级过热器和再热器热偏差状况,对运行状况进行优化评判,从而降低管壁温度峰值,控制管壁超温幅度和超温时间,进而减缓氧化皮的生成速度,使锅炉运行的安全性和经济性得到双重保证.通过在某600 MW超临界锅炉上的在线优化运行,表明锅炉末级过热器屏间热偏差系数最大约为1.2,比以往的最大热偏差系数下降了10%.

Online Optimization on Thermal Deviation of High-temperature Heat Pipe Panels for a Supercritical Boiler

Based on calculation of thermal deviation of boiler superheater and reheater,and using global optimum seeking method,an evaluation was carried out to working conditions of a supercritical boiler according to its current load,mill operation mode,burner tilt,air distribution mode and actual thermal deviation of the superheater and reheater,so as to reduce the peak temperature of relevant tube walls,control their overheating time and amplitude,slow down the generation of oxide scales,and therefore obtain safe ...