作者ivy7132000 (ivy)
看板ChemEng
标题[问题] 单元操作
时间Sun Oct 26 11:22:17 2008
研究了很久 这题一直不知该怎麽写 小妹愚笨 麻烦大家帮忙
A vertical cylindrical settler-separator is to be designed for separating a
mixture flowing at 20.0 m3/h and containing equal volumes of a light
petroleum liquid(密度b=875 kg/m3) and a dilute solution of wash water(密度
a=1050
kg/m3).
Laboratory experiments indicate a settling time of 15 min is needed to
adequately separate the two phases.
For design purposes use a 25-min settling time and calculate the size of the
vessel needed, the liquid levels of the light and heavy liquids in the
vessel, and the height hA2 of the heavy-liquid overflow.
Assume that the ends of the vessel are approximately flat, that the vessel
diameter equals its height, and that one-third of the volume is vapor space
vented to the atmosphere.
题目要求hA2的高度 有给答案 hA2=1.537m
是要先算质量流率吗??? 还是要算什麽??? 麻烦各为指点了 感激不尽!!
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1F:推 lightidea:Geankoplis 2.2-8? 我想了10分钟 就放弃解下题了 10/26 11:31
2F:推 bervis:好怀念XD 10/26 14:23