三塔双效精馏分离环氧氯丙烷的模拟与优化OA

The extraction method for the treatment of epichlorohydrin reaction products has problems such as large amount of extractant and low efficiency,a three-tower double-effect distillation process was proposed for the separation of epichlorohydrin.Aspen Plus simulation software was used to simulate the process.On this basis,the process parameters of the pre-separation tower were optimized,followed by the optimization of the process parameters of the low-pressure and high-pressure towers with the objective of minimizing the total annual cost CTA,and further optimized by combining the fully heat-integrated and partially heat-integrated techniques.The results show that the theoretical number of plates for the pre-separation tower,low-pressure tower and high-pressure tower are 48,7 and 8,respectively.The feed plate position are 30th,2nd and 6th,respectively.The mass reflux ratios are 8.82,0.16 and 1.63,respectively.The fully heat-integrated and partially heat-integrated technologies save 15.8%and 19.3%of the CTA of the low and high pressure towers,respectively,while the energy consumption is reduced by about 31.5%in both cases,partial heat integration synthesizes better results.The optimization results can provide a reference for the separation of epichlorohydrin products.