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各位前辈，我用PROII的简洁塔模拟精馏后出现问题，求大大帮看下哪里出问题了，附件里面有模拟文件。感谢啊
*** PROBLEM SOLUTION BEGINS
FEED FLASH BEGINS
** WARNING ** The liquid enthalpy of BIPHENYL at temperature 313.15 K is
outside the acceptable range of 342.2 K through 533.37 K.
FEED FLASH COMPLETE
UNIT 1 BEGINS - 'SCD1 '
*** ERROR *** UNIT 1, 'SCD1' - Improvement in the solution is impossible.
FENSKE calculations STOPPED at trial 11 .
UNIT 1 NOT SOLVED
*** PROBLEM SOLUTION NOT REACHED
***
*** GLOBAL DEVIATION 25.41 MOLE PERCENT
*** MAXIMUM DEVIATION ON COMPONENT BIPHENYL OF 100.00 MOLE PERCENT
***
** WARNING ** Unit 'SCD1' DID NOT SOLVE
*** Run completed - Case not solved
*** THIS RUN USED 2.24 PRO/II SIMULATION UNITS
*** RUN STATISTICS
STARTED 10:50:22 07/06/16 1 ERROR
FINISHED 10:50:22 07/06/16 2 WARNINGS
RUN TIMES NO MESSAGES
INTERACTIVE 0 MIN, 0.00 SEC
CALCULATIONS 0 MIN, 0.40 SEC
TOTAL 0 MIN, 0.40 SEC
** WARNING ** PROBLEM SOLUTION NOT REACHED. ** Note- Default Tolerances in
unit specifications, recycle loops and columns are tightened
starting with PRO/II 9.4. If the file is happened to converge
in previous version, probable reason for non-convergence could
be tightened tolerance in current version.
** WARNING ** UNDERWOOD calculations FAILED to converge.
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发表于 1970-1-1 08:00:00
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