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新聞資訊

影響短程蒸餾器分離效果的因素有哪些?

       影響短程蒸餾器分離效果的因素主要有以下幾點:
       1、溫度:選擇適蒸發溫度。
       2、壓強:當蒸餾溫度達相應值時,壓強越小,物料的沸點越低,分子平均自由程越大,輕分子從蒸發面到冷凝面的阻力越小,分離成效越好。
       3、被蒸餾物質的性質:相對揮發度越大,也就是待分離的輕、重組分分子的蒸汽壓之比越大,兩者越易分離。
       4、進料速度:進料時物料流速太快,待分離組分還未蒸發就流到蒸發面底部,起不到分離作用。短程蒸餾器系統物料流速太慢,影響分離效率。
       5、蒸發液膜的覆蓋面積、厚薄和均勻度:蒸發液膜越薄、越均勻、覆蓋面積越大,蒸餾成效越好。
       6、物料中雜質:物料中雜質會影響短程分子蒸餾設備的分離效率,可以用離心機進行預處理。
       7、攜帶劑的使用:攜帶劑要求沸點高,對短程蒸餾器中物料有較好的溶解性,不與物料發生化學反應,且易于分離出去。
2022/10/27 08:39:02 75 次


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