Aspen模拟吸收塔吸收CO2 遇到的问题
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%.
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！ 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？ abcd 发表于 2012-3-23 16:47 static/image/common/back.gif
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
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！ jack2003860 发表于 2012-3-27 15:59 static/image/common/back.gif
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。
如果不需要保密的话，放出你的模拟文件.bkp，大家帮你看看。 ljjt 发表于 2012-3-28 10:04 static/image/common/back.gif
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
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 IN50 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 ...
结果是可用的。Results Available. ljjt 发表于 2012-3-28 19:17 static/image/common/back.gif
结果是可用的。Results Available.
但是并没有收敛啊，而且还是有error的啊
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。 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 ...
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！ jack2003860 发表于 2012-3-27 15:59 static/image/common/back.gif
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 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
结果是可靠的额！ 楼主我是做二乙醇胺的想给你交流下哈461441205 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 感谢楼主分享楼主好人{:1106_362:}{:1106_362:} 都是高手呀，学习。。。。
页:
[1]
2