apsen plus 中做塔的NQ曲线的问题

1149633025 · 发表于 1970-1-1 08:00:00

对两股出口物流做了设计规定后收敛了，在做NQ曲线时不收敛，调节上下限和设计规定的回流比都不行，求大神帮助。
->Processing input specifications ...

  * WARNING IN THE "PROPERTIES" PARAGRAPH WHICH BEGINS ON LINE 55

   FREE-WATER METHOD SHOULD BE STEAMNBS WHEN THE MAIN
   PROPERTY METHOD IS SRK. DEFAULT FREE-WATER METHOD IS STEAM-TA
   PLEASE SPECIFY THE RECOMMENDED FREE-WATER METHOD AND RUN AGAIN.

   INFORMATION
   BINARY PARAMETERS PRKIJ (DATA SET 1) FOR MODEL ESPRSTD
   ARE RETRIEVED FROM SDF TABLE.  TABLE NAME = ESPRSTD

  * WARNING IN PHYSICAL PROPERTY SYSTEM
   NRTL BINARY PARAMETERS FOR ALL COMPONENT PAIRS ARE ZERO,
   YOUR RESULTS MAY NOT BE ACCURATE. PLEASE REVIEW AND PROVIDE BINARY
   PARAMETERS AS APPROPRIATE.

  Flowsheet Analysis :

COMPUTATION ORDER FOR THE FLOWSHEET:
B2 B1 B3

->Calculations begin ...

Block: B2    Model: DUPL

Block: B1    Model: DSTWU

Block: B3    Model: RADFRAC

   Convergence iterations:
      OL ML IL    Err/Tol
      1 1 4    84.332
      2 5 19    32.804
      3 3 8    18.965
      4 3 7    5.2826
      5 2 5    0.44053

->Generating block results ...

Block: B3    Model: RADFRAC

   Convergence iterations:
      OL ML IL    Err/Tol
      1 5 12    0.35285E-01

  *** START GENERATION OF NQ CURVES ***

** Feed tray optimization for the case with NSTAGE = 17 **

   Convergence iterations:
      OL ML IL    Err/Tol
      1 5 19    630.49
      2 3 9    72.545
      3 3 7    18.988
      4 2 4    2.4558
      5 2 4    0.36991
  * WARNING WHILE GENERATING RESULTS FOR UNIT OPERATIONS BLOCK: "B3" (MODEL:
   "RADFRAC")
   OUTSIDE LOOP TOLERANCE WAS SATISFIED BUT DESIGN SPEC ITERATION
   (MIDDLE LOOP) FAILED TO CONVERGE. REACHED AN OPTIMUM VALUE.

   Base case column failed to converge at number of
   stages = 17. NQ curve generation stopped.

   Feed tray optimization failed to converge for NSTAGE = 17
  * WARNING WHILE GENERATING RESULTS FOR UNIT OPERATIONS BLOCK: "B3" (MODEL:
   "RADFRAC")
   NQ CURVE "1" NOT GENERATED SINCE THE COLUMN FAILED TO
   CONVERGE AT THE FIRST CASE WITH 17 STAGES.

** Converging the base case for NSTAGE = 22 **

   Convergence iterations:
      OL ML IL    Err/Tol
      1 4 10    0.16344E-01

  *** END GENERATION OF NQ CURVES ***

->Simulation calculations completed ...

  ***  Warning(s) were issued during Input Translation ***
  ***  Check the Run Status Results for more Information ***

            ***  Summary of Simulation Errors  ***

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

下载地址

Simulation ４.bkp

2016-10-18 23:06 大小：107.13 KB 下载次数：11

wdz000@126.com · 发表于 1970-1-1 08:00:00

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apsen plus 中做塔的NQ曲线的问题

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