简介:摘 要:针对燃煤火力发电站,实时软测量煤质参数,实时计算锅炉受热面清洁因子,按照严格设计的逻辑动作吹灰器,将定时定量的传统吹灰方式,升级为按需适量的智能吹灰方式,确保锅炉长周期安全稳定运行。结果表明,锅炉受热面的污染类型包括炉膛水冷壁区域的高温结渣,屏式过热器、高温过热器、高温再热器区域的高温粘结灰,尾部竖井烟道低温过热器的干松积灰,空气预热器的硫酸氢铵粘结灰。吹灰控制策略的模糊判定规则制定的依据包括吹灰运行经验,运行规程限制,锅炉设计因素,吹灰启动保护,安全经济指标以及受热面污染特性。智能吹灰控制系统基于在线监测参数,实时计算分析锅炉受热面的污染程度,在保证机组经济性和安全性的前提下,通过制定合理的吹灰控制策略,实现变“定时定量”为“按需适量”的智能吹灰闭环控制系统。
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