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近年来,循环流化床燃烧技术已趋成熟,但在实际运行中,由于检修或出现故障,为了满足生产、发电需要,实施锅炉超负荷运行,给循环流化床锅炉的安全经济可靠运行带来很多隐患,问题不容忽视。 1 循环流化床锅炉超负荷运行带来的问题在设计时,根据锅炉的蒸发量、工作压力、燃料特性等数据已考虑到循环流化床锅炉的结构型式,受热面的多少,各处的烟气速度等进行了合理的布置和选取。但因超负荷运行势必带来如下问题。 1.1 烟气速度的提高带来的磨损问题循环流化床锅炉的磨损始终伴随着整个燃烧过程,锅炉超负荷运行时磨损尤为突出。某厂2005年3月使用我公司1台25t/h低倍率循环流化床锅炉,采用
In recent years, circulating fluidized bed combustion technology has matured, but in actual operation, due to overhaul or failure, in order to meet the production and power generation needs, the implementation of boiler overload operation, to the circulating fluidized bed boiler safe and economical operation of the belt To a lot of hidden dangers, the problem can not be ignored. A circulating fluidized bed boiler problems caused by overloading operation In the design, based on the boiler evaporation, working pressure, fuel characteristics and other data have been taken into account the structure of the circulating fluidized bed boiler type, the number of heating surface, everywhere Flue gas velocity and other reasonable arrangements and selection. However, due to overload operation is bound to bring the following questions. 1.1 Fatigue problems caused by the increase of flue gas velocity Circulating fluidized bed boiler wear is always accompanied by the entire combustion process, especially when the boiler is in overloaded operation. A plant in March 2005 to use my company a 25t / h low rate circulating fluidized bed boiler, using