有关换热器翻译? this unit comprises two horizontal u-tube exchanger shells mounted in series, one on top of the other. both shells are cs clad with 304l ss and the tubes which carry src steam are ss. 该单元包括两个串联安装的水平u形管式管壳换热器，一个装在另一个上面。（两台换热器）壳体（材质）是碳钢覆有304l 不锈钢，走src蒸汽的管程为不锈钢 u形管、水平是这种管壳式换热器的外形和安装方位，这俩是串联的，安装的时候一个摞在另一个的上面查看更多
H2S吸收塔不收敛？ 各位老马，小弟在做nahco3/na2co3吸收h2s的模拟，参考了 aspen 自带的k2co3吸收h2s 的例子，但是在流程运行的时候总会出错，错误报告如下： block: b1 model: radfrac convergence iterations: ol ml il err/tol 1 1 1 0.32481e-11 2 1 1 0.18800e-10 3 1 1 0.18186e-10 *** severe error material and energy balances failed to converge: check col-specs or supply better temperature and composition estimates. *** severe error the following stages dried up: 1 4 5 6 8 12 14 a limit of 0.10000e-04 * sum of feeds was imposed on the flow rates. ** error h-loop does not converge in 7 trials. energy balance not satisfied within maximum number of iterations. ** error block b1 is not in mass balance: mass inlet flow = 0.44426642e+03, mass outlet flow = 0.20990861e+03 relative difference = 0.11164755e+01 - 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 12 errors 0 0 17 warnings 1 0 6 * warning h-loop does not converge in 8 trials. energy balance not satisfied within maximum number of iterations. feed flash calculations failed to converge; feed profile in report may be wrong. ** error h-loop does not converge in 7 trials. energy balance not satisfied within maximum number of iterations. 反而是我随便设置的进料条件下运行却能成功，但是一旦用了设定的条件运行就会报错，我 认为错误可能出在进料比例或进料量上，以前没怎么做过吸收塔，不晓得具体原因出在哪， 错误报告也不太能明白，还有，我已经在chemistry里设置了nahco3和na2co3的解离反应， 为什么运行结果吸收液中nahco3和na2co3仍然以分子形式存在的呢，这和错误有关系吗？ 求指导。。小弟这厢多谢了！ps上传了两个附件，不知道哪个形式的能打开，版本是7.2的 查看更多
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