PVA 醇解尾气吸收的模拟研究

摘要

In the process of PVA production, alcoholysis of tail gas contains a certain amount of methyl acetate and methanol.Nowadays most of the enterprises adopt the mode of condensation recovery, but the effect is not ideal.By using Aspen Plus software, through the TDE thermodynamic engine for obtaining experimental data, the experimental data for the selection of an appropriate thermodynamic model, and the use of Radfrac module in the equilibrium and rate of two kinds of model, the amount of absorbent and absorption tower height of packing degree were calculated.It has certain directive significance on actual production.%在PVA生产过程中，醇解尾气含有一定量的醋酸甲酯和甲醇，现大多数的企业采用冷凝的方式进行回收，效果不理想。本文利用Aspen Plus软件，首先通过TDE热力学引擎获取实验数据，然后根据实验数据选取合适的热力学模型，最后通过采用Radfrac模块中的平衡和速率两种模型，计算出吸收剂用量和吸收塔填料层高度，对实际生产有一定的指导意义。