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2、間接式燃氣熱風爐

主要適用于被干燥物料不允許被污染，或應用于溫度較低的熱敏性物料干燥。如：奶粉、制藥、合成樹脂、精細化工等。此種加熱裝置，即是將蒸氣、導熱油、煙道氣等做載體，通過多種形式的熱交換器來加熱空氣。間接式熱風爐的最本質問題就是熱交換。熱交換面積越大，熱轉換率越高，熱風爐的節能效果越好，爐體及換熱器的壽命越長。反之，熱交換面積的大小也可以從煙氣溫度上加以識別。煙溫越低，熱轉換率越高，熱交換面積就越大。

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A week later, she tore down the face of the gauze suddenly screams, frighten sincerity busy ran out from the kitchen: " how? " " Pointing mirror hand shake, Prudential see " face also surprised with his mouth wide open, " face thick black skin all fade, face becomes smooth as. " You pinch me, I is it right? In the dream? " Prudential gently pinch pinch " of the face: " silly girl, not dreaming! Maybe you are too good, God put beautiful skin you. " Will be sincere in her arms ": " I look good! Find a beautiful pig! "

Look in the mirror, embracing, phoenix feather finally stopped sneezing, use can kill fox eyes looked at Sue made: " I know why you let me go. I scolded you, praise! Hum! " Shu Han mask mouth laughs: " be friend husband accused but not comfortable! " Feng Yu curled his lip, " you and the girl what roles? " "Tut-tut, really talk! " Shu Han gently smiled : "it is a conventional story, I was trying to avoid lightning wrath when hiding in the city at the Queen 's under the bed. When the girl but the queen of queen, but that the rough. Dying to hope that the afterlife can get a true man, at the cost of talent exchange to beauty. I was her grace, reserved for her previous beauty, when she found someone to her heart. " " Her and who does the exchange? " " You know the land the judge? " Shu Han waved his hand, " from his take of human skin is also. " Feng Yu was amazed: " who is? " Shu Han hee hee laugh: " of course is a beauty! "
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