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直接接觸式換熱器的特點

時間：2020-06-17 來源：公司新聞瀏覽次數(shù)：365

直接接觸式換熱器又稱混合式換熱器，是依靠冷、熱流體直接接觸而進行傳熱的，這種傳熱方式避免了傳熱間壁及其兩側(cè)的污垢熱阻，只要流體間的接觸情況良好，就有較大的傳熱速率。故凡允許流體相互混合的場合，都可以采用混合式熱交換器，例如氣體的洗滌與冷卻、循環(huán)水的冷卻、汽-水之間的混合加熱、蒸汽的冷凝等等，具體應用有冷卻塔、氣壓冷凝器、氣體洗滌器等。

采用這種換熱器，熱量能有效地從一種流體傳遞到另一種流體，即傳熱效率高，單位傳熱面上能傳遞的熱量多；其結(jié)構(gòu)能適應所規(guī)定的工藝操作，運轉(zhuǎn)安全可靠，密封性好，清洗、檢修方便，流體阻力小。同時價格便宜，維護容易，可使用時間長。但明顯的缺點就是應用范圍小，僅適用于工藝上允許兩種流體混合的場合。

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