apsen plus 中做塔的NQ曲线的问题？ 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 查看更多
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