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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