Aspen模拟吸收塔吸收CO2 遇到的问题

bernice · 发表于 1970-1-1 08:00:00

Aspen模拟吸收塔吸收CO2 遇到这样的问题，请高人帮忙

   INFORMATION WHILE GENERATING REPORT FOR UNIT OPERATIONS BLOCK: "ABSORBER"
   (MODEL: "RADFRAC")
   TPSAR MESSAGE: 334.32%  JET FLOOD IN COLUMN ABSORBER, SECTION 1
                     EXCEEDS 80%.

   INFORMATION WHILE GENERATING REPORT FOR UNIT OPERATIONS BLOCK: "ABSORBER"
   (MODEL: "RADFRAC")
   TPSAR MESSAGE: 827.27%  DC BACKUP IN COLUMN ABSORBER, SECTION 1
                     EXCEEDS 80%.

   INFORMATION WHILE GENERATING REPORT FOR UNIT OPERATIONS BLOCK: "ABSORBER"
   (MODEL: "RADFRAC")
   TPSAR MESSAGE: 810.64%  OF SYSTEM LIMIT IN COLUMN ABSORBER, SECTION 1
                     EXCEEDS 80%.

cdy2001 · 发表于 1970-1-1 08:00:00

遇到困难出绝招：看我马后炮！马后炮，化工利器！马能克敌，炮能制胜！

abcd · 发表于 1970-1-1 08:00:00

反应设置好了吗？

abcd于2012-3-23 16:47补充以下内容：
反应设置好了吗？

bernice · 发表于 1970-1-1 08:00:00

abcd 发表于 2012-3-23 16:47

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反应设置好了吗？

反应没问题，刚刚又检查一下，发现是有些性质参数没设置好。设置好后上面的问题消失啦，但是还有一个问题，就是

Block:ABSORBER Model: RADFRAC

INFORMATION

REACTIVE FLASH FAILURE INSIDE LOOP RMSERR = 8.5083-02 OUTSIDE LOOP

RMSERR = 2.6685D-05 COMPOSITE FEED FLASH FAILED TOCONVERGE; COLUMN

CALCULATIONS CONTINUE

jack2003860 · 发表于 1970-1-1 08:00:00

你的流股类型选用的是CONVERGE，是这个问题，字面意思：是反应闪蒸失败，内循环RMSERR = 8.5083-02 超出循环范围， RMSERR = 2.6685D-05 复合进料闪蒸对于CONVERGE流股类型是无效的。
建议你选用properties的时候把CO2定义为亨利组分试试！

bernice · 发表于 1970-1-1 08:00:00

jack2003860 发表于 2012-3-27 15:59

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你的流股类型选用的是CONVERGE，是这个问题，字面意思：是反应闪蒸失败，内循环RMSERR = 8.5083-02 超出循环 ...

我已经在component--Henry Comps 这里定义了亨利组分，有CO2，还有其余的几种气体，不晓得您说的在properties那里定义，具体是指在什么地方啊。
在properties--specification---的Henry components那里，我也已经选择了在上一步定义的亨利组分。

ljjt · 发表于 1970-1-1 08:00:00

如果不需要保密的话，放出你的模拟文件.bkp，大家帮你看看。

bernice · 发表于 1970-1-1 08:00:00

ljjt 发表于 2012-3-28 10:04

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如果不需要保密的话，放出你的模拟文件.bkp，大家帮你看看。

好，我上传，请各位大侠帮我看看。我的版本是V7.2

ljjt · 发表于 1970-1-1 08:00:00

下面是你的.bkp文件在v7.3下运行的情况：

<< Loading Simulation Engine 16:03:22 Wed Mar 28, 2012>>

->Processing input specifications ...

   INFORMATION
   THERE ARE HENRY COMPONENTS DEFINED IN THIS CASE, THE BINARY DATABANK
   WILL BE SEARCHED AUTOMATICALLY FOR ANY AVAILABLE HENRY CONSTANTS.

   THE PAIR PARAMETERS FOR ELECNRTL OPTION SET HAS BEEN RETRIEVED FROM
   DATABANK ENRTL-RK.

   INFORMATION
   PURE COMPONENT PARAMETERS FOR SOME COMPONENTS ARE RETRIEVED FROM
   DATABANK.  THESE PARAMETERS ARE USED WITH THE ELECNRTL OPTION SET
   UNLESS YOU ENTER YOUR OWN PARAMETERS IN PROP-DATA PARAGRAPHS.
   PARAMETER RKTZRA RETRIEVED FOR COMPONENT MDEA

   PARAMETER THRSWT(ELEMENT/3) RETRIEVED FOR COMPONENT H2O

   PARAMETER VLBROC RETRIEVED FOR COMPONENT H2S

   PARAMETER CPDIEC RETRIEVED FOR COMPONENT MDEA

   PARAMETER VLBROC RETRIEVED FOR COMPONENT CO2

   PARAMETER PLXANT RETRIEVED FOR COMPONENT H2O

  Flowsheet Analysis :

COMPUTATION ORDER FOR THE FLOWSHEET:
ABSORBER

->Calculations begin ...

Block: ABSORBER Model: RADFRAC
  * WARNING
   REACTIVE FLASH FAILURE INSIDE LOOP RMSERR = 7.9494-02 OUTSIDE LOOP
   RMSERR = 9.3271D-05

   INFORMATION
   REACTIVE FLASH FAILURE INSIDE LOOP RMSERR = 8.4965-02 OUTSIDE LOOP
   RMSERR = 5.8085D-07 COMPOSITE FEED FLASH FAILED TO CONVERGE; COLUMN
   CALCULATIONS CONTINUE.  IF CALCULATIONS FAIL, SUPPLY T-EST AND OPTIONALLY
   BOTH X-EST AND Y-EST.

   Convergence iterations:
      OL ML IL    Err/Tol
      1 1 10    4341.1
      2 1 10    7415.3
      3 1 4    4629.5
      4 1 4    2394.8
      5 1 3    1170.1
      6 1 6    3604.6
      7 1 7    5077.7
      8 1 5    5555.8
      9 1 5    5492.1
      10 1 3    4152.9
      11 1 3    2575.4
      12 1 5    4006.9
      13 1 7    6814.7
      14 1 4    5974.7
      15 1 3    4318.0
      16 1 5    2680.7
      17 1 10    6313.7
      18 1 7    5524.6
      19 1 3    4589.1
      20 1 5    4619.8
      21 1 4    4415.1
      22 1 4    3613.7
      23 1 6    4980.7
      24 1 6    5754.0
      25 1 10    7235.9
      26 1 10    9042.2
      27 1 6    7131.7
      28 1 5    7187.5
      29 1 5    5875.8
      30 1 3    3328.2
      31 1 5    3144.8
      32 1 7    6163.9
      33 1 5    5922.3
      34 1 3    4465.0
      35 1 5    2972.0
      36 1 8    5093.1
      37 1 5    4594.2
      38 1 5    5200.5
      39 1 3    4126.8
      40 1 5    3709.0
      41 1 5    4255.0
      42 1 6    5047.6
      43 1 9    5547.9
      44 1 8    7432.7
      45 1 6    7033.7
      46 1 5    5861.6
      47 1 3    3522.0
      48 1 4    3046.9
      49 1 7    5694.3
      50 1 5    5433.4
  **  ERROR
   RADFRAC NOT CONVERGED IN  50 OUTSIDE LOOP ITERATIONS.

  * WARNING IN PHYSICAL PROPERTY SYSTEM
   ELECTROLYTE THERMAL CONDUCTIVITY MODEL KL2RDL HAS MISSING PARAMETERS:
   IONRDL (DATA SET 1) MISSING FOR COMPONENT HS-    . VALUE OF ZERO USED

  * WARNING IN PHYSICAL PROPERTY SYSTEM
   IONRDL (DATA SET 1) MISSING FOR COMPONENT S-2    . VALUE OF ZERO USED

  * WARNING IN PHYSICAL PROPERTY SYSTEM
   IONRDL (DATA SET 1) MISSING FOR COMPONENT MDEAH+  . VALUE OF ZERO USED

  * WARNING IN PHYSICAL PROPERTY SYSTEM
   ELECTROLYTE DIFFUSION COEFFICIENT MODEL DL0NST HAS MISSING PARAMETERS:
   IONMOB (DATA SET 1) MISSING FOR COMPONENT HS-    . NOMINAL VALUE USED

  * WARNING IN PHYSICAL PROPERTY SYSTEM
   IONMOB (DATA SET 1) MISSING FOR COMPONENT S-2    . NOMINAL VALUE USED

  * WARNING IN PHYSICAL PROPERTY SYSTEM
   IONMOB (DATA SET 1) MISSING FOR COMPONENT MDEAH+  . NOMINAL VALUE USED

   RateSep convergence iterations: ABSORBER
         Iter    Err/Tol
            0    397.95
            1    205.75
            2    22.054
            3    0.60068
            4    0.29572E-02

->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    6             0             1

->Generating results ...

ljjt · 发表于 1970-1-1 08:00:00

结果是可用的。Results Available.

bernice · 发表于 1970-1-1 08:00:00

ljjt 发表于 2012-3-28 19:17

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结果是可用的。Results Available.

但是并没有收敛啊，而且还是有error的啊

jack2003860 · 发表于 1970-1-1 08:00:00

7.2运行的结果的却不收敛，具体原因可能在于你的初始值的设置及收敛方法的选择，建议更改迭代最大次数为200，增大收敛误差，选用合适的收敛方法，并了解相关工艺数据，修改迭代的初始参数。

ljjt · 发表于 1970-1-1 08:00:00

有点莫名奇妙：

<< Loading Simulation Engine 20:54:54 Thu Mar 29, 2012>>

->Processing input specifications ...

   INFORMATION
   THERE ARE HENRY COMPONENTS DEFINED IN THIS CASE, THE BINARY DATABANK
   WILL BE SEARCHED AUTOMATICALLY FOR ANY AVAILABLE HENRY CONSTANTS.

   THE PAIR PARAMETERS FOR ELECNRTL OPTION SET HAS BEEN RETRIEVED FROM
   DATABANK ENRTL-RK.

   INFORMATION
   PURE COMPONENT PARAMETERS FOR SOME COMPONENTS ARE RETRIEVED FROM
   DATABANK.  THESE PARAMETERS ARE USED WITH THE ELECNRTL OPTION SET
   UNLESS YOU ENTER YOUR OWN PARAMETERS IN PROP-DATA PARAGRAPHS.
   PARAMETER RKTZRA RETRIEVED FOR COMPONENT MDEA

   PARAMETER THRSWT(ELEMENT/3) RETRIEVED FOR COMPONENT H2O

   PARAMETER VLBROC RETRIEVED FOR COMPONENT H2S

   PARAMETER CPDIEC RETRIEVED FOR COMPONENT MDEA

   PARAMETER VLBROC RETRIEVED FOR COMPONENT CO2

   PARAMETER PLXANT RETRIEVED FOR COMPONENT H2O

  Flowsheet Analysis :

COMPUTATION ORDER FOR THE FLOWSHEET:
ABSORBER

->Calculations begin ...

Block: ABSORBER Model: RADFRAC

   Convergence iterations:
      OL ML IL    Err/Tol
      1 1 7    3586.0
      2 1 6    1953.5
      3 1 3    734.39
      4 1 2    306.86
      5 1 2    163.94
      6 1 2    117.60
      7 1 2    90.303
      8 1 2    83.055
      9 1 2    62.849
      10 1 2    58.087
      11 1 2    37.962
      12 1 2    16.425
      13 1 2    11.214
      14 1 1    9.3662
      15 1 2    10.850
      16 1 2    6.4922
      17 1 2    3.9131
      18 1 2    1.9923
      19 1 2    1.4728
      20 1 2    1.2882
      21 1 2    1.0438
      22 1 2    1.1901
      23 1 2    0.89051

   RateSep convergence iterations: ABSORBER
         Iter    Err/Tol
            0    262.12
            1    146.70
            2    21.932
            3    1.4351
            4    0.11733E-01
            5    0.48166E-04

->Simulation calculations completed ...

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

  ***  No Errors or Warnings were issued during Simulation ***

->Generating results ...

wsblataiai · 发表于 1970-1-1 08:00:00

楼主发贴辛苦了，谢谢楼主分享！我觉得马后炮化工论坛是注册对了！

gaoyanxia666 · 发表于 1970-1-1 08:00:00

jack2003860 发表于 2012-3-27 15:59

登录/注册后可看大图

你的流股类型选用的是CONVERGE，是这个问题，字面意思：是反应闪蒸失败，内循环RMSERR = 8.5083-02 超出循环 ...

我想跟你学习一下收敛，我也做CO2吸收，请问您的QQ是多少

北方的狼 · 发表于 1970-1-1 08:00:00

楼主你好，我在做反应时也出现你的问题了，请问你的那个亨利组分在哪里设置的

BORN · 发表于 1970-1-1 08:00:00

结果是可靠的额！

哇喔 · 发表于 1970-1-1 08:00:00

楼主我是做二乙醇胺的想给你交流下哈461441205

哇喔 · 发表于 1970-1-1 08:00:00

楼主我今天看了下你发的哈你的吸收塔的convergence应该把Absorber下的：NO改成yes吧不然怎么会叫吸收塔你这个整的像汽提塔

一步到海底 · 发表于 1970-1-1 08:00:00

感谢楼主分享楼主好人{:1106_362:}{:1106_362:}

原红 · 发表于 1970-1-1 08:00:00

都是高手呀，学习。。。。

Aspen模拟吸收塔吸收CO2 遇到的问题

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