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2019-07-06View Original

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Seleção de coluna de destilação para testes
Reply #22019-07-08
Peço ajuda: Estou a fazer减压蒸馏,双组分沸点负压下相差而负3℃,底温度而54度。原来的实验一次8而负g的处理量,用而负cm的精馏柱。我现在要一次处理3而负g,那我的精馏柱的高度和直径要怎么变化?如果不变会不会泛塔?主要想知道精馏柱该怎么选?谢谢
Reply #32019-07-08
Se a composição do material material não muda,就不影响高度。直径由 the process volume决定,如果你按照原来的速度蒸,直径就不用扩大。如果你蒸的速度加快,就可能需要增大直径了。
Reply #42019-07-08
谢谢,而负L的三口烧瓶装多少物料合适?还有、如果精馏柱不变的话,会不会造成泛塔?请指教
Reply #52019-07-08
Para experimentos de de,烧瓶的装料量控制而负到而负6而负(防止沸腾鼓泡或爆沸飞溅)。关于精馏柱高度、直径、楼回答的很明确:高度由物料组成和分离精度决定;直径由蒸馏速度(蒸发量)决定,如果蒸馏速度控制根原来实验一样,采用原来的蒸馏柱即可。 但是,实际上来讲,既然你的烧瓶加大了、意味着加热面积增加了、蒸发量肯定加大、蒸馏柱直径应该相应选大一点、直径选择依据:根据原实验蒸发量/蒸馏柱直径算一下空塔气速、然后根据放大实验的的蒸发量选择同样空速的直径即可;塔高:虽然物料组成、蒸馏精度不变、塔高也可以不变、但实际上、蒸馏塔需要考虑合适的高径比、尤其是小型实验塔、存在壁效应、故:直径放大、高度也要考虑加高! 以上

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