分离乙酰丙酸，水，甲醇，硫酸

椒盐土豆 · 发表于 1970-1-1 08:00:00

用DSTWU精馏塔分离乙酰丙酸，水，甲酸和硫酸，要求乙酰丙酸的塔釜收率为99.5%，塔顶甲酸收率为96.5%，水为99.8%，用的是NRTL（不知道选啥好）但是回流比，塔板数结果出来有错误，请教各位大神帮忙看看，下面是计算过程<< Problem specifications modified 19:20:38 Sat Apr 13, 2019>>

->Processing input specifications ...

->Finished processing new specifications

->Calculations begin ...

Block: B1    Model: DSTWU
  **  ERROR
   MINIMUM REFLUX RATIO CALCULATED FROM UNDERWOOD EQUATION
   IS -0.35917E-02.  REFLUX RATIO RESET TO 0.1.

->Simulation calculations completed ...

  ***  No Warnings were issued during Input Translation ***

            ***  Summary of Simulation Errors  ***

               Physical
               Property       System       Simulation
  Terminal Errors    0             0             0
Severe Errors    0             0             0
         Errors    0             0             1
      Warnings    0             0             0

xsahh · 发表于 1970-1-1 08:00:00

这个体系不应该用DSWU

椒盐土豆 · 发表于 1970-1-1 08:00:00

谢谢您的回复，不是应该先用dswu简洁计算得出回流比和塔板数，然后复杂计算的么，不用dswu回流比和塔板数怎么知道？我是个初学者请您多多指教