二次燃烧空气预热器（Secondary Combustion air preheater） ，一般都是用烟气通过交换器设备将热量进行交换给空气，从而达到预热空气的作用。所以，空气预热器就是热交换器得一种 好难。
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These sediments are prone to spontaneous combustion, which is known as the secondary combustion air preheater. The need for air preheater's hot spot detection to prevent them is necessary.
这些沉积物很容易发生自燃，称为空气预热器的二次燃烧，需要对空气预热器进行热点检测来加以预防。
Air preheater a of Unit 5 boiler in Shajiao 'a' Power Plant experienced a secondary combustion during Standby. As a result, the air preheater was damaged seriously.
沙角发电总厂A厂5号炉a空气预热器(以下简称“空预器”)在停炉期间发生二次燃烧，造成该空预器严重损坏。
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