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萃取过程模拟优化是化工过程模拟计算的重要组成部分,其模块的开发是必不可缺的。为实现基于CAPE-OPEN标准的萃取塔单元模块,首先明确萃取塔的功能,对流率加和算法进行改进,建立萃取过程的数学模型;然后,采用C++语言与COM组件技术对萃取塔单元模块进行开发。通过测试芳烃抽提实例对所开发模块进行验证,经迭代计算后能够达到收敛精度。将各塔板温度、萃取相及萃余相流量、组成等计算结果同化工模拟软件Aspen Plus进行对比。结果表明,所开发的萃取塔单元模块可以准确计算塔内各平衡级的组成、流量和温度分布,从而验证所开发的萃取塔单元模块的计算结果是可靠的。
Extraction process simulation optimization is an important part of chemical process simulation and the development of its module is indispensable. In order to realize the module of extraction column based on CAPE-OPEN standard, firstly, the function of extraction column is clarified, the algorithm of flow rate addition is improved, and the mathematic model of extraction process is established. Then, the module of extraction column module is implemented by C ++ language and COM component technology Development. The developed module is verified by testing aromatics extraction examples, and the convergence accuracy can be achieved after iterative calculation. The calculation results of temperature, extraction phase, raffinate phase flow and composition of each tray were compared with Aspen Plus, a chemical simulation software. The results show that the developed extraction tower unit module can accurately calculate the composition, flow rate and temperature distribution of each equilibrium tower in the tower, so as to verify the calculation result of the extraction tower unit module developed is reliable.