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三里画廊

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[求助] 求助!aspen精馏塔简洁设计

我做的也是一个对二甲苯的精馏分离,主要是分离对二甲苯间、间二甲苯、甲苯和水,亲,关键组分我设置的是水重,关键组分是对二甲苯。收率一个是0.9518,一个是0.001,回流比是4,冷凝器/再沸器是11/13bar,调整了回流比以后,错误依旧是一样的,想问一下大家应该怎么解决呢?然后还想问一下物性方法都可以选什么呢?
error
   calculated minimum number of stages (-0.29813) is less than zero.
   this usually results when it is too easy to separate the light and
   heavy key components.
   minimum reflux ratio calculated from underwood equation
   is -1.7476.  reflux ratio reset to 0.1.
进行简捷设计和和严格计算的时候需要单独拿一个模块还是要放到整个流程进行两次计算呢?
另外一个就是,物性方法选nrtl会出现上述第二个错误 改成SRK后会提示让我换成setam-ta,但是改完后查不到结果,不知道应该怎么设置?
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