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发明公开
CN102287847A 减少冷端结垢的再生性空气预热器设计 无效 - 驳回 转让

减少冷端结垢的再生性空气预热器设计
摘要：
本发明涉及减少冷端结垢的再生性空气预热器设计，具体而言，描述了一种空气预热器100，其具有在降低的锅炉负荷的时期期间部分地限制空气入口130的空气节流器组件162以及部分地限制烟道气入口124的烟道气节流器组件152。限制烟道气入口124减小预热器的有效表面面积，从而使更多的热量传到空气预热器100的冷端，从而减少酸冷凝物和结垢。限制气体入口124提高气体速度，从而磨蚀空气预热器100中的积聚物，而且减少结垢。限制空气入口130减小空气预热器的有效传热表面面积，这提高空气预热器的冷端中的气体温度，并且因此减少酸冷凝物和结垢。
摘要（英）：

An air preheater 100 is described having an air damper assembly 162 that partially restricts an air inlet 130 and a flue gas damper assembly 152 that partially restricts flue gas inlet 124 during periods of reduced boiler load. Restricting the flue gas inlet 124 reduces the effective surface area of the preheater causing more heat to pass to the cold end of the air preheater 100, reducing acid condensation and fouling. Restricting the gas inlet 124, increases gas velocity, thereby eroding accumulations in the air preheater 100, also reducing fouling. Restricting the air inlet 130 reduces the effective heat transfer surface area of the air preheater, which raises the gas temperature in the cold end of the air preheater and thereby reduces acid condensation and fouling.

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