To study the complex internal flow of rotating packed bed(RPB)with triangular spiral packing,regular triangular model was established to describe the actual triangular spiral packing,pressure drop(dry bed)of a countercurrent rotating packed bed with this packing model was simulated by realizable k-εturbulence model based on the calculation platform of Gambit-Fluent.The result indicates that the positive triangular model is fit for the actual situation of triangular spiral packing of large specific surface area and high pore ratio.Violent turbulent of air happens in the packing surface, mass transfer was greatly strengthen.The Average relative error of pressure drop(dry bed)between CFD simulation and experimental results is about 15.8%,which is under the different gas flux and rotational speed in the RPB with regular triangle packing.

In order to improve the design efficiency of batch distillation with binary nonideal solution,a computer aimed design method of constant distillate composed and reflux ratio was presented.The gas-liquid equilibrium equation deduced by intelligent fitting method was used for calculating the theoretical plate numbers.Gauss-legendre numerical integral method was adopted to solve the relevent integral and the design software was programmed with Visual Basic 6.0.The numerous design and operating parameters of batch distillation with binary nonideal solution were quickly and accurately solved by the design software.The connection of reflux and tank temperature was achieved using this software.Process feed-forward control of batch distillation was realized by tank temperature.A computer aimed design method greatly improved the design efficiency of batch distillation with binary nonideal soltion.