伸手触摸阳光 发表于 2024-4-30 18:28:24

aspen plusv12中甲醇精馏模拟

甲醇精馏模拟的原料组分(进料流量92285kg/hr)中有共沸物，在预精馏的收敛选项需要选择共沸吗？丙酮(0.003%)与甲醇是共沸物，异丁醇(0.044%)与水是共沸物，正丁醇(0.048%)与水是共沸物，我选择共沸收敛之后出现了许多问题，



*** SEVERE ERROR
      FLASH CALCULATIONS FAILED TO CONVERGE IN12ITERATIONS.   BUBBLE POINT
      CALCULATION HAS DRIVEN THE TEMPERATURE DOWN TO THE LOWER LIMIT OF
      71.1346 DEGREE K.BUBBLE POINT TEMPERATURE MAY NOT EXIST AT THE
      SPECIFIED PRESSURE.

*   WARNING
      COMPONENT "CO" IS NOT IN PHASE EQUILIBRIUM. RELATIVE ERROR IN VL
      FUGACITY IS 0.9868 . LN FUGACITIES ARE 7.0860 FOR VAPOR AND 14.0782 FOR
      LIQUID. MOLE FRACTIONS ARE 9.1929-03 FOR VAPOR AND 9.1378-03 FOR LIQUID.
      LN FUG COEFFICIENTS ARE 0.0 FOR VAPOR AND 6.9983 FOR LIQUID.

*   WARNING
      COMPONENT "CH4" IS NOT IN PHASE EQUILIBRIUM. RELATIVE ERROR IN VL
      FUGACITY IS 6.9023 . LN FUGACITIES ARE -70.8204 FOR VAPOR AND 11.9987 FOR
      LIQUID. MOLE FRACTIONS ARE 0.0D FOR VAPOR AND 2.0282-02 FOR LIQUID. LN
      FUG COEFFICIENTS ARE 0.0 FOR VAPOR AND 4.0414 FOR LIQUID.

*   WARNING
      COMPONENT "CH4" IS NOT IN PHASE EQUILIBRIUM. RELATIVE ERROR IN VL
      FUGACITY IS 7.5370 . LN FUGACITIES ARE -71.1267 FOR VAPOR AND 10.8806 FOR
      LIQUID. MOLE FRACTIONS ARE 0.0D FOR VAPOR AND 6.8341-03 FOR LIQUID. LN
      FUG COEFFICIENTS ARE 0.0 FOR VAPOR AND 4.0052 FOR LIQUID.

**ERROR
      FLASH CALCULATIONS FAILED TO CONVERGE IN60ITERATIONS.FAILURE TO
      SOLVE 2-PHASE FIXED VFRAC PROBLEM AS TP SUBPROBLEMS. T= 14.8411 P=
      1.4083D+05 VCALC= 1.0003D-13 VSPEC= 0.0


       Convergence iterations:
         Iter   Err/Tol
            0   0.13901E+22
            1   0.13901E+22
*** SEVERE ERROR
      MATERIAL AND ENERGY BALANCES FAILED TO CONVERGE: CHECK COL-SPECS
      OR SUPPLY BETTER TEMPERATURE AND COMPOSITION ESTIMATES.

*** SEVERE ERROR
      THE FOLLOWING STAGES DRIED UP:
      1    2    3    4    5    6    7    8    9   10   25
      A LIMIT OF0.10000E-04 * SUM OF FEEDS WAS IMPOSED ON THE FLOW RATES.


**ERROR
      BLOCK C001 IS NOT IN MASS BALANCE:
      MASS INLET FLOW = 0.25634722E+02, MASS OUTLET FLOW = 0.22944997E+02
      RELATIVE DIFFERENCE = 0.11722492E+00


*** SEVERE ERROR
      MATERIAL AND ENERGY BALANCES FAILED TO CONVERGE: CHECK COL-SPECS
      OR SUPPLY BETTER TEMPERATURE AND COMPOSITION ESTIMATES.


**ERROR
      BLOCK C001 IS NOT IN MASS BALANCE:
      MASS INLET FLOW = 0.26079167E+02, MASS OUTLET FLOW = 0.25913795E+02
      RELATIVE DIFFERENCE = 0.63816208E-02

attach://166072.bkp

伸手触摸阳光 发表于 2024-4-30 18:28:24

attach://166078.bkp

zhenxikan 发表于 2024-4-30 18:28:24

{:1110_553:}

zhanshuimian 发表于 2024-4-30 18:28:24

至少模拟文件要传上来吧，看看有大神能否帮你解决。

wygnei 发表于 2024-4-30 18:28:24

感谢分享！

伸手触摸阳光 发表于 2024-4-30 18:28:24

zhanshuimian 发表于 2024-5-1 08:01
至少模拟文件要传上来吧，看看有大神能否帮你解决。

啊这，我的问题，我昨天只发了个附件链接，没搞好

wmm598 发表于 2024-4-30 18:28:24


我看不错噢 谢谢楼主！马后炮化工越来越好！

amine 发表于 2024-4-30 18:28:24

伸手触摸阳光 发表于 2024-4-30 18:28:24

amine 发表于 2024-5-1 13:44


谢谢大哥，我自己琢磨了几天没搞懂差点给自己搞炸了

zxckkzxc 发表于 2024-4-30 18:28:24

{:1110_553:}

fengyan0425 发表于 2024-4-30 18:28:24

{:1110_550:}
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