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    熱點產品
    非標壓力容器
    新型薄膜蒸發器
    蒸發結晶機組
    mvr蒸發器
    旋轉蒸發器
    有色金屬設備制造
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    地址:遼寧省鐵嶺縣新臺子工業園區
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    壓力容器廠家:薄膜蒸發器與短程蒸餾器的差別

        1、從結構上看, 短程蒸發器是一個具有內置冷凝器的薄膜蒸發器。而通常我們所指的薄膜蒸發器,其內部是沒有冷凝器,冷凝器是外置式的,與薄膜蒸發器的氣相出口相連接。


        2、另外一個結構上的區別是,通常薄膜蒸發器的氣相出口在蒸發器的頂部(特殊情況也有在下部),因為輕組分的蒸汽是自下向上流動的。 


        短程蒸發器的氣相出口是在蒸發器的底部,這是因為在短程蒸發器內蒸發的輕組分要充分地在內置冷凝器上進行冷凝,成為液態從底部排出。因為輕組分充分冷凝,應該不會再有氣相輕組分被抽到真空泵系統中。 


        薄膜蒸發器和短程蒸發器的這種結構上的區別導致了不同的工藝性能表現,即: 短程蒸發器可以達到最低0.1Pa的操作壓力,而薄膜蒸發器可以達到的最低操作壓力為100Pa. 

        這是因為短程蒸發器的內置冷器冷凝了絕大部分的氣態輕組分至液態,能迅速地消除氣態輕組分所產生的蒸汽壓,也就是說,幾乎沒有壓力降。所以短程蒸發器內可以達到極低的操作壓力。 

        而薄膜蒸發器的氣相要經過一個氣相管口進入外冷器,在氣相管口處,會產生較大的壓力降,也就是說薄膜蒸發器內的蒸汽壓力會較高,最低可達到1mbar。 

        所以,短程蒸發器更加適合熱敏性物料或高沸點物料的蒸餾,可以大大降低組分的沸點。 


        但短程蒸發器也有其局限性,由于有內置冷凝器,刮膜轉子沒有辦法加底部軸承,刮膜轉子是從頂部自由懸下來的。顯然,刮膜轉子無法處理粘度非常大的物料,因為轉子的底部會產生較大的震動,影響刮膜的效果,所以短程蒸發器只能處理粘度較低的物料。 


        而薄膜蒸發器恰恰能克服短程蒸發器的這種局限性,薄膜蒸發器的中心是空的,所以刮膜轉子可以加底部軸承,轉子的扭矩更大,穩定性更好,薄膜蒸發器有更多的刮膜轉子形式可供選擇,能處理低粘度到非常高的粘度的范圍更廣的物料。 


        遼寧天實化工機械有限公司始建于1976年,是全國較早專業制造特材設備的公司之一,企業通過ISO9001國際質量體系認證,擁有國家質量監督檢驗檢疫總局頒發的A1(單層高壓)、A2級(第Ⅲ類低、中壓)容器制造許可和A1(單層高壓)、A2級(第Ⅲ類低、中壓)容器設計許可,是中國有色金屬協會鈦鋯鉿分會會員單位、中國氯堿協會會員單位、中國制鹽協會會員單位,注冊資金8100萬人民幣,現有員工300余人。

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