基于Aspen Plus的煤气化副产物粗酚的分离精制

Separation of Gasification Byproducts Crude Phenol Based on Aspen Plus

针对煤气化副产物粗酚的组分和组成特点,设计了三塔和双塔两条连续减压精馏工艺.借助Aspen Plus软件对构建的分离工艺进行系统的模拟研究,物性方法采用NRTL模型.首先利用DSTWU模块简捷设计计算得到了塔板数、回流比和采出量等操作参数,对比得出适合该系统的分离工艺为双塔精馏.然后利用Rad FRAC模块对设计结果进行严格模拟核算,最终得出双塔B1和B2的塔板数分别为29和31;进料塔板级数分别为15和16;回流比分别为2.87和2.44.在最佳操作条件下,所得产品质量分数分别为苯酚99.0%,对(间)甲酚86.1%,二甲酚96.5%.本研究结果可为粗酚的实际分离工艺设计和操作过程提供参数依据.

In this paper,the three towers and two towers continuous vacuum distillation process were designed preliminarily according to the component characteristics of the coal gasification by-products of crude phenols.The separation process was studied systematically by using aspen pus with the NRTL property method. DSTWU simple design model was used to calculate the required process parameters firstly,and the appropriate process for the separation of the system was determined by comparing the obtained parameters. And then,Rad FRAC model was used to carry out the strict checking of the results of parameters,the process parameters（ i. e.numbers of the column,the feed stage number,and the reflux ratio） of the two towers was obtained eventually,and the main operating parameters and working conditions was also determined. It was designed to establish a foundation for the process development.